АДСОРБЕР СИСТЕМЫ УЛАВЛИВАНИЯ ПАРОВ ТОПЛИВА

Изобретение относится к транспортным средствам, оснащенным двигателями внутреннего сгорания (ДВС), в частности к системам питания ДВС, а именно к адсорберам системы улавливания паров топлива, поглощающим топливные испарения из топливного бака. Решение технической задачи направлено на уменьшение токсичности ДВС транспортного средства. Адсорбер содержит корпус 1 с крышкой 2 и днищем 3. Внутри корпуса 1 расположены две перегородки 6 и 7, между которыми находится адсорбирующее вещество 8, от крышки 2 к дну 3 корпуса проходит трубка 12, а пространство между нижней перегородкой и дном образует емкость 10 для сбора конденсата, представляющую собой перевернутый усеченный конус. На дне 3 корпуса 1 на плоскости вершины 4 усеченного конуса выполнен кольцевой выступ 11, направленный внутрь емкости 10, а на трубке 12 имеется расширение 13, доходящее до дна 3 и охватывающее выступ 11, на боковой поверхности которого выполнено по меньшей мере одно сквозное окно 14, причем верхний край окна 14 и расширение ...

СЕПАРАТОР

... 1. Сепаратор, содержащий герметичный полый корпус, имеющий штуцер и горловину, на которой расположен гравитационный клапан, отличающийся тем, что корпус выполнен из пластических масс, имеющий форму параллелепипеда со скругленными углами, а гравитационный клапан и штуцер расположены на торцевой поверхности корпуса на максимально удаленном расстоянии друг от друга.2. Сепаратор по п.1, отличающийся тем, что гравитационный клапан и штуцер расположены соосны.3. Сепаратор по п.1, отличающийся тем, что на одной из стенок корпуса выполнены продольные ребра жесткости и элементы крепления.4. Сепаратор по п.1, отличающийся тем, что штуцер выполнен заедино с корпусом.

СИСТЕМА (ВАРИАНТЫ) И СИСТЕМА ВПУСКА В ДВИГАТЕЛЕ

... 1. Система, содержащая:впускной трубопровод, включающий в себя воздушный проточный канал в сообщении по текучей среде с камерами сгорания двигателя и имеющий углубленный карман; иуловитель углеводородов с пассивным поглощением, расположенный внутри впускного трубопровода, причем часть уловителя углеводородов с пассивным поглощением определяет границу воздушного проточного канала, при этом уловитель углеводородов с пассивным поглощением включает в себя воздухопроницаемый слой, соединенный со слоем подложки, соединенным с впускным трубопроводом, причем слой поглощения углеводородов расположен между воздухопроницаемым слоем и слоем подложки.2. Система по п.1, в которой воздухопроницаемый слой и слой подложки соединены по периферии воздухопроницаемого слоя и слоя подложки.3. Система по п.1, в которой слой поглощения углеводородов включает в себя множество секций, разнесенных друг от друга.4. Система по п.3, в которой воздухопроницаемый слой и слой подложки соединены посредством соединительной ...

ТОПЛИВНАЯ СИСТЕМА ДЛЯ ТРАНСПОРТНОГО СРЕДСТВА

... 1. Топливная система для транспортного средства, содержащая:топливный бак для хранения топлива, используемого двигателем транспортного средства;бачок, присоединенный к топливному баку для приема и накопления паров топливного бака;клапан продувки бачка, присоединенный между бачком и впускным коллектором двигателя для подачи накопленных паров топливного бака из бачка в двигатель;вентиляционный клапан бачка, присоединенный между бачком и атмосферой; иконтроллер с машинно-читаемыми командами дляв ответ на разрежение в топливном баке выше порогового значения при работе двигателяосуществления мониторинга изменения разрежения в топливном баке вслед за последующим понижением тяги двигателя, причем топливный бак изолируется после понижения тяги двигателя; иразличения ухудшения работы клапана продувки бачка от ухудшения работы вентиляционного клапана бачка на основании подвергнутого мониторингу изменения разрежения в топливном баке.2. Система по п. 1, в которой изолирование топливного бака после ...

Устройство для улавливания и нейтрализации паров бензина

I. УСТРОЙСТВО ДЛЯ УЛАВЛИВАНИЯ И НЕЙТРАЛИЗАЦИИ ПАРОВ БЕНЗИНА, содержащее карбюратор, установленный на впускной трубе двигателя, поплавковую камеру с паровым пространством и балансировочным каналом, соединеннь1ми между собой трубопроводом, перекрываемым клапаном, управляемым разреженным во впускной трубе, адсорбер с адсорбентом, прутшной и установочным патроном, соединенный трубопроводами с клапаном карбюратора , воздушным фильтром, впускной трубой и через блок клапанов - с бензобаком , отличающееся тем, что, с целью повышения надежности и долговеччости, адсорбер размещен в установочном патроне, а его днище вьтолнено эластичным, причем между днищем адсорбера и установочным патроном размещена пружина о и 2, Устройство по п. 1, отличающееся тем, что адсорбер снабжен индивидуальным воздушным фильтром.

VERFAHREN UND SYSTEM ZUR KRAFTSTOFFDAMPFSTEUERUNG

Es werden Verfahren und Systeme zum Erzeugen eines ausreichenden Vakuums bereitgestellt, um eine Leckdetektionsroutine zu ermöglichen. Während ein Kraftstofftankdruck innerhalb mechanischer Grenzen liegt, werden Kraftstoffdämpfe bei offenem Absperrventil aus einem Aktivkohlebehälter zu einem Motor gespült, um eine gewünschte Vakuumhöhe in dem Kraftstofftank zu erzeugen. Danach wird der Kraftstofftank isoliert und die Leckdetektion wird gleichzeitig mit dem Spülen durchgeführt.

Verfahren und System zur Kraftstoffsystemsteuerung

Verfahren und Systeme zum Steuern eines Kraftstoffsystems in einem Hybridfahrzeug werden bereitgestellt. Bevor eine Kanisterspülung durch Schließen eines Spülventils gestoppt wird, wird ein Kanisterentlüftungsventil geschlossen, um ein Kraftstofftankvakuum zu halten. Danach wird das Spülventil während einer anschließenden Kanisterspülung geöffnet, bevor das Entlüftungsventil geöffnet wird, sodass die Kanisterspülung unter Kraftstofftankvakuumbedingungen initiiert werden kann.

Improvements in carburetters for internal combustion engines

... 397,778. Spray carburetters. MARKLIN APPARATEBAU GES., 23, Rochlitzerstrasse, Chemnitz, Germany. Feb. 27, 1933, No. 5899. Convention date, May 25, 1932. Addition to 318,644, [Class 7 (iii), Internal-combustion engines, Carburetting- apparatus &c. for]. [Class 7 (iii).] In a spray carburetter of the kind in which a preliminary mixture is fed to the induction passage by way of an atomizing chamber having a downward extension into which unatomized fuel particles drain for return to the atomizing chamber, as described in the parent Specification, the air inlet pipe is disposed concentrically about the fuel nozzle and is itself surrounded by a further concentric casing communicating at its lower end with the extension of the atomizing chamber. Fuel from a supply x is sucked through a calibrated plug n into a nozzle pipe a communicating by orifices c with a concentric tube b, the top of which communicates with the outer air through a casing d having its upper end closed in on the pipe a. A concentric ...

Improvements in Carburetters for Internal Combustion Engines.

... 126,722. Royce, F. H., and Rolls- Royce, Ltd. Feb. 27, 1917. Spray carburettors.- In apparatus of the type in which the throttle valve is on the engine side of the jet and in which the nozzle comprises two concentric annular vertical chambers communicating by a series of orifices, the top of the float tank p and the top of one vertical chamber c, which is in communication with the atmosphere. are in simultaneous communication through a pipe m with the main air intake f at a point remote from the choke tube. The float tank p is connected by a pipe n to an annular chamber m<2> at the base of the nozzle. The top of the chamber c is in communication also with the chamber m<2> through the passage m<3>, and the pipe m leads from the chamber m<2> to the mouth of the main air intake. Oil spilt from the float tank or from the chamber c issues from the pipe m, is collected in the main air intake, and is drained therefrom through the pipe l. When running slowly, the engines draws its fuel through ...

Improvements in or relating to vaporizers for internal combustion engines

... 192,794. Graef, E. W. Nov. 11, 1921. Vaporizers, external.-A vaporizer 2 is secured to or cast upon the outer face of the exhaust manifold 1 and upon the outer face of the vaporizer is secured by bolts another passage 11. The mixture from the carburettor 10 is directed in various proportions by the part 14a of the throttle through the vaporizer 2 or the cooler passage 11.. The parts 14, 14 of the throttle may be relatively adjustable, so that hot mixture only, cold mixture only, or both may be supplied, or they may be in different parts of the pipe and connected by adjustable linkwork. The path of the gases is indicated by the arrows. In a modification the gases after passing through the vaporizer are conveyed to the opposite side of the engine. In this case the chamber 2 surrounds the exhaust pipe. Specifications 5431/10 and 10115/13 are referred to.

Procedure for the production of cyanogen acetic acid esters

COMBUSTION AIR LINE OF AN INTERNAL-COMBUSTION ENGINE

CRANKCASE EMISSION SEPARATOR AND COLLECTOR

CRANKCASE EMISSION SEPARATOR AND COLLECTOR Interposed in a conduit which conducts crankcase emissions to the air fuel intake side of an internal combustion engine is a vessel having means for separating deleterious liquid and solid components from the crankcase emissions and collecting these contaminants in the vessel. Atmospheric air is brought into collision with the emissions to enhance separation. The cleaned gaseous fraction, mixed with atmospheric air is then conducted from the vessel through a positive crankcase ventilation (PCV) valve interposed in the portion of the conduit leading from the separatorcollector to the air-fuel intake side of the engine. The clean gas-air mixture joins the engine's air-fuel mixture in the combustion chamber and increases vehicle mileage. At suitable intervals, the separator-collector vessel is disconnected from the conduit and the collected contaminants are removed.

DRAIN RECYCLE SYSTEM FOR TWO-CYCLE ENGINE

APPARATUS FOR VENTING FUEL VAPORS

MICROCONDENSER DEVICE AND EVAPORATIVE EMISSION CONTROL SYSTEM AND METHOD HAVING MICROCONDENSER DEVICE

A microcondenser device for an evaporative emission control system includes a housing having an inlet for receiving fuel vapor and a condensation outlet for discharging condensed fuel vapor, and a porous element disposed in the housing and fluidly interposed between the inlet and the condensation outlet for absorbing the fuel vapor received through the inlet. The microcondenser device further includes a thermoelectric element in thermal contact with the porous element for removing heat from the fuel vapor absorbed by the porous element to condense the fuel vapor.

IN-LINE FLUID AGITATOR

An in-line agitating device for fluids includes an elongate internally- threaded cylindrical tube, open at each end, with a flow-disturber such as a round ba ll positioned inside the tube so as to substantially but not completely block off the bore of the tube. When a fluid is introduced into one end of the tube, its velocity increases as it is forc ed through the restricted space between the ball and the inner surface of the tube and then rapidly decelerates, causing turbulence which results in vigorous agitation of the fluid. This agitation is intensified by swirling action imparted to the fluid by the internal threading of the tube.

Vorrichtung zum Verdampfen flüssiger Brennstoffteile in dem Ladegemisch von Vergaser aufweisenden Verbrennungskraftmaschinen.

Spritzvergaser für mit schwerflüchtigen Brennstoffen gespeiste Explosionsmotoren.

Verfahren zur Herstellung von Cyanessigsäureestern

Improvements brought to the carburettors for internal combustion engines

Carburettor-mixer with power-controls giving, by an instantaneous adjustment, a suitable proportioning of the mixture, whatever the flow of this last

New process of food and new devices of pipes of aspiration for spark-ignition engines

Improvements brought to the devices of carburation for internal combustion engines

Method and device for preheating the liquid fuel of a diesel engine

METHOD FOR DIAGNOSING SEALING IN A FUEL VAPOUR RECIRCULATION SYSTEM AND RELATED RECIRCULATION SYSTEM

AUTOMATIC EXTRACTION OF ETHANOL FROM AN OIL PAN OF AN ETHANOL COMBUSTION ENGINE

A method is provided for operating a fuel ventilation system of an internal combustion engine. The method may include feeding a blow-by fuel from the internal combustion engine to a vent fluidly coupled therewith. The method may also include separating fuel vapor from the blow-by fuel in the vent and condensing the fuel vapor to a liquid fuel in a fuel collector fluidly coupled with the vent. The method may further include directing the liquid fuel from the fuel collector to an accumulator and discharging the liquid fuel from the accumulator to the internal combustion engine.

Sample tube structure for automotive fuel tank leak detection

A vapor management system (10) includes a sense tube (47) disposed in a fuel tank (12). A differential pressure sensor (17) has one side connected to the sense tube and another side connected to a vapor cavity so that the pressure sensor can measure a differential pressure (DP) between a volume of the vapor cavity and a volume of the sense tube containing liquid fuel. A temperature sensor (26) is in the vapor cavity. A processor 1) receives DP and T measurements at certain time intervals to determine the temperature at time zero (T0), the differential pressure at time zero (DP0), the temperature at a certain time (Tt), and the differential pressure at a certain time (DPt), and 2) when (TtT0) is greater than a certain value, compares DPt to a certain differential pressure value.

Liquid fuel trap device

A liquid fuel trap device for a vehicle fuel system includes a housing forming a confined space and including an outlet port connectable to a fuel vapor recovery system via a fuel vapor passage; and a valve capable of discharging liquid fuel from the confined space into a fuel tank. The housing includes at least two retention devices adapted to impede fuel in the housing from reaching the outlet port in angled positions of the housing.

Connection between an integrated pressure management apparatus and a vapor collection canister

An integrated pressure management system manages pressure and detects leaks in a fuel system. The integrated pressure management system also performs a leak diagnostic for the headspace in a fuel tank, a canister that collects volatile fuel vapors from the headspace, a purge valve, and all associated hoses and connections.

Method and apparatus for fuel recovery in internal combustion engines

Apparatus and method for recovering fuel from the induction system of an internal combustion engine having a carburetor, comprising one or a plurality of collectors along the fuel path between the carburetor throttle valve and the inlet valves of the engine, the collectors being in the form of annular recesses in the walls of the ducts, which recesses act to trap fuel which flows back as a liquid condensed onto the inlet manifold pipes as a reaction to the closure of the associated inlet valve of the engine. Each collector is connected by a drainage systems of conduits via expansion tanks and a pump, to the petrol tank of the engine and/or to the inlet to the carburetor whereby fuel which condenses prior to being drawn into the engine can be recycled for vaporization thereby avoiding its entry into the engine as a liquid.

Method and apparatus for preparing combustible mixtures

Method for fuel vapor canister purging

A method of controlling fuel vapor purging in a hybrid electric vehicle capable of selectively operating an engine is disclosed. In one example, the method includes initiating purging in response to an amount of liquid fuel residing in a fuel tank of the hybrid electric vehicle and a duration since the previous fuel tank filling event.

Tank venting device for a motor vehicle

A tank venting device for a motor vehicle has a fuel tank, a fuel vapor accumulator for storing fuel vapors escaping from the fuel tank and a connection line, via which the fuel vapors may flow from the fuel tank into the fuel vapor accumulator. Furthermore, an overpressure line having an overpressure valve is provided, via which the fuel vapors may flow from the fuel tank into the fuel vapor accumulator when the overpressure valve is open. An attachment of the connection line on the fuel vapor accumulator and an attachment of the overpressure line on the fuel vapor accumulator are situated at different points on the fuel vapor accumulator. The operational reliability of a tank venting procedure may thus be increased and the adsorption capacity of the fuel vapor accumulator may be used better.

Small engine carbon canister with check valve

A power source is provided for a machine. The power source includes an engine and an engine fuel system of the type that generates fuel vapor containing hydrocarbon material.

Emission control devices for air induction systems of internal combustion engines

An emission control device for an air induction system of an internal combustion engine having high adsorption capacity, yet low flow resistance is disclosed. The AIS emission control device comprises a first case including an outlet-opening connected to an intake manifold of the engine; a second case including an inlet-opening for the intake air; and an adsorbent element positioned in a plane across the intake airflow, wherein the adsorbent element has an opening area such that the control device has a pressure drop of less than about 1 inch H2O at the air flow rate of about 300 cfm and % reduction in vapor emission of at least about 75% after one day of the vapor generation rate of about 220 mg/day.

Abnormality detection device for internal combustion engine

An abnormality detection device of an internal combustion engine includes an ECU that is an abnormality detection unit detecting a leakage occurrence of a second pure pipe. When the internal combustion engine is in a supercharging operation state that a supercharger operates and the second purge pipe is closed by a second purge valve, the ECU detects the leakage occurrence of the second purge pipe based on a differential pressure between a pressure in the second purge pipe and an atmospheric pressure. In this case, the valve pressure in the second purge pipe is a pressure in the second purge pipe between the second purge valve and the intake pipe.

Bidirectional adsorbent-canister purging

A method for combusting a vapor of a fuel accumulated in an adsorbent canister in a vehicle, the vehicle having an engine and a fuel tank coupled to the adsorbent canister. The method comprises, during a first operating condition including a higher availability of compressed air, metering the compressed air from a first air source, and flowing the metered, compressed air through the adsorbent canister along a first flow path. The method further comprises, during a second operating condition including a lower availability of compressed air, flowing air from a second air source through the adsorbent canister, and, during the first and second operating conditions, venting the fuel tank to an intake of the engine and flowing effluent enriched in the vapor from the adsorbent canister to the intake of the engine.

Integrated fuel tank and vapor containment system

A fuel tank for an engine that includes an air cleaner assembly and an air-fuel mixing device. The fuel tank includes a first tank portion, a second tank portion connected to the first tank portion to define a fuel chamber, and a canister at least partially formed as part of the first tank portion. A first flow path is at least partially formed as part of the first tank portion. The first flow path provides fluid communication between the fuel chamber and the canister. A second flow path is at least partially formed as part of the first tank portion to provide fluid communication between the canister and at least one of the air-fuel mixing device and the air cleaner assembly.

METHOD FOR SUPPLYING FUEL FOR HIGH-PRESSURE NATURAL GAS INJECTION ENGINE

Provided is a fuel supply method for a marine structure using a high-pressure natural gas injection engine, for example, an ME-GI engine, in which boil-off gas generated in an LNG storage tank is compressed to a medium pressure, reliquefied, compressed to a high pressure, gasified, and then supplied to the high-pressure natural gas injection engine. In the fuel supply method for the high-pressure natural gas injection engine, BOG stored in a stored in the storage tank is compressed to a pressure of 12 to 45 bara (absolute pressure) and then reliquefied. A reliquefaction apparatus includes a cold box configured to exchange heat between a refrigerant and the BOG, a compression unit configured to compress the refrigerant heated by the cold box, an expansion unit configured to expand the compressed refrigerant to drop the temperature thereof, and a plurality of gas-liquid refrigerant separators configured to separate the refrigerant into a gaseous refrigerant and a liquid refrigerant. A gaseous ...

FUEL PUDDLE BLEED SHUT-OFF FOR FUEL INJECTED TWO CYCLE ENGINE

A marine fuel injection system for a two cycle crankcase compression internal combustion engine includes a puddled fuel return line (44) between the crankcase (16) and a vapor separator (33). A shut-off valve (50) in the puddled fuel return line (44) is closed at high engine speed to prevent the flow at a high rate of a substantially gaseous medium to the vapor separator, to prevent fuel foaming otherwise caused thereby in the vapor separator and which would pass through the vapor vent line (41) to the induction manifold (17), causing an over-rich condition at high engine speed. At low engine speed, the shut-off valve (50) is open, permitting flow of puddled fuel to the vapor separator, which flow is substantially more liquidic and at a lower rate.

FUEL SPRAY PROMOTER FOR INTERNAL-COMBUSTION ENGINE

PURPOSE: To atomize and diffuse fuel-air mixture by once separating insufficiently atomized or insufficiently gasified mixture in a suction pipe from the normal suction gas stream while ejecting it again into the suction gas flow through the negative pressure of the suction pipe. CONSTITUTION: A U-shaped pipe 6 is fixed at the bottom of a suction pipe 3' where one end 6a is slightly projected in the shape of obliquely cut in order to receive the dynamic pressure of the suction flow at the under layer section of the suction flow section 5'. The other end 6b is reduced by said one end 6a and projected near to the central portion of the suction flow from the bottom of the suction pipe at the upper stream of the projected section of said one end 6a. A portion of the insufficiently gasified mixture is caught by one end 6a of a pipe while ejected again into the suction flow section 5' on the basis of the principle of atomizer. COPYRIGHT: (C)1983,JPO&Japio ...

АДСОРБЕР СИСТЕМЫ УЛАВЛИВАНИЯ ПАРОВ ТОПЛИВА

Изобретение относится к транспортным средствам, оснащенным двигателем внутреннего сгорания (ДВС), в частности к системе питания ДВС, а именно к адсорберам, поглощающим топливные испарения из топливного бака. Адсорбер содержит корпус 1 цилиндрического типа, ограниченный крышкой 2 и дном 3. Внутри корпуса 1 расположено адсорбирующее вещество, представляющее собой единый блок 4, установленный с зазором по отношению к внутренней боковой стенке корпуса. В крышке 2 имеются три патрубка сообщения блока 4 с атмосферой, топливным баком и системой впуска воздуха в ДВС. На крышке и дне выполнены центрирующие кольцевые выступы 8 и 9, направленные внутрь корпуса, входящие в контакт с блоком и обеспечивающие зазор. Между центрирующим выступом на дне и блоком, а также между крышкой и блоком установлены эластичные прокладки. Технический результат заключается в повышении эффективности работы адсорбера. 2 з.п. ф-лы, 2 ил.

АДСОРБЕР

Изобретение относится к транспортным средствам, оснащенным двигателями внутреннего сгорания, в частности к системам питания ДВС, а именно к адсорберам системы улавливания паров топлива, поглощающим топливные испарения из топливного бака. Изобретение позволяет повысить надежность работы адсорбера. Адсорбер содержит герметичный корпус, состоящий, по крайней мере, из двух частей, внутри которого находится адсорбирующее вещество, при этом на одной из частей корпуса имеются три патрубка: подвода, отвода паров топлива и патрубок, связывающий внутреннюю полость адсорбера с атмосферой, а также, по меньшей мере, одну емкость (ловушку) для сбора жидкого топлива (конденсата). В патрубке подвода паров топлива имеется сужение его проходного сечения, выполненное на горизонтальном участке патрубка, выше его горизонтальной оси. Сужение проходного сечения в патрубке подвода паров топлива выполнено в дополнительной вставке, смонтированной внутри этого патрубка, с возможностью ее свободного монтажа и демонтажа ...

ТОПЛИВНАЯ СИСТЕМА АВТОМОБИЛЯ И СПОСОБ ЕЕ ЭКСПЛУАТАЦИИ

Изобретение относится к топливной системе и способам обнаружения утечек в топливной системе транспортных средств, например автомобилей с гибридным приводом. Способ проведения испытаний на утечку в топливной системе при выключенном двигателе. Контроллер топливной системы может быть переведен в активный режим после определенного времени, прошедшего с момента выключения зажигания, достаточного для того, чтобы давление и температура топливного бака стабилизировались. Если давление и температура топливного бака стабильны, может быть приведен в действие топливный насос, чтобы увеличить давление паров в топливном баке и выявить наличие утечек в топливной системе по скорости последующего спада давления. Технический результат: улучшение показателей проведения и завершения испытания на утечку, благодаря улучшению обнаружения утечек обеспечивается улучшение качества выбросов отработавших газов и повышается вероятность соответствия выбросов предъявляемым к ним требованиям. 3 н. и 17 з.п. ф-лы, 6 ил ...

БАЧОК ДЛЯ ТОПЛИВНЫХ ПАРОВ (ВАРИАНТЫ)

Изобретение может быть использовано в системе улавливания паров топлива для транспортного средства. Система включает в себя бачок для топливных паров, имеющий корпус 202, прижимную пластину 204 внутри корпуса и торцевую заглушку 208, имеющую форму полого усеченного конуса. Торцевая заглушка содержит двухстороннюю поверхность 212 контакта с пружиной 206 и двухстороннюю уплотняющую поверхность 214 для стыковки с корпусом 202, имеющую двухсторонние одинаковые пазы 246 и 248, причем только один из них используется для стыковки с корпусом 202 бачка. Пружина 206 прикрепляется к прижимной пластине 204 и только к одной стороне поверхности контакта с пружиной. Технический результат - создание универсального бачка для топливных паров для использования в различных системах улавливания паров топлива. 3 н. и 21 з.п. ф-лы, 8 ил.

СПОСОБ ПРОВЕРКИ СИСТЕМЫ ПРОДУВКИ ПАРОВ ТРАНСПОРТНОГО СРЕДСТВА, ТРАНСПОРТНОЕ СРЕДСТВО С ГИБРИДНЫМ ПРИВОДОМ И СПОСОБ ПРОВЕРКИ СИСТЕМЫ ПРОДУВКИ ПАРОВ НА БОРТУ ТРАНСПОРТНОГО СРЕДСТВА

Изобретение может быть использовано в системе продувки паров, присоединенной к двигателю внутреннего сгорания в транспортном средстве с электрическим гибридным приводом. Способ проверки системы продувки паров транспортного средства с двигателем внутреннего сгорания включает обнаружение команды для отключения транспортного средства, закрытие первого клапана, присоединенного между бачком с активированным углем системы продувки паров и атмосферой. Способ также заключается в приведении в действие двигателя для создания разрежения в системе продувки паров, закрытии второго клапана, присоединенного между бачком с активированным углем и двигателем и контролирование давления в системе продувки паров. Раскрыты транспортное средство с гибридным приводом и способ проверки системы паров транспортного средства. Технический результат заключается в снижении расхода топлива транспортного средства и выбросов. 3 н. и 15 з.п. ф-лы, 7 ил.

ВПУСКНОЙ КОЛЛЕКТОР ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Использование: в машиностроении. Сущность изобретения: впускной коллектор выполнен в виде двух трубопроводов - приемного 1 и подающего 2, вставленных один в другой с небольшим зазором 3 между их стенками. В месте их соединения выполнена наклонная, расширяющаяся книзу сборная кольцевая полость 4, в нижней точке которой выполнено отверстие с отводящей трубкой 5. На концах трубопроводов 1 и 2 имеются фланцы 6 и 7 для крепления. 2 з.п. ф-лы, 2 ил.

ВЫЧИСЛЕНИЕ РАСХОДА НА ЭЖЕКТОРЕ ДЛЯ КОМПЕНСАЦИИ ДАТЧИКА ГАЗОВОЙ СОСТАВЛЯЮЩЕЙ

... 1. Система двигателя, содержащая:эжектор, обводящий впускной компрессор, причем окно всасывания эжектора присоединено ниже по потоку от системы продувки паров топлива, причем любые датчики размещены вне местоположения, находящегося между упомянутым окном и упомянутой системой продувки паров топлива;систему рециркуляции отработавших газов (EGR), соединенную с впускным каналом; идатчик газовой составляющей, расположенный во впускном канале ниже по потоку от системы EGR и выхода эжектора.2. Система по п. 1, дополнительно содержащая:дроссель системы впуска воздуха (AIS), расположенный во впускном канале выше по потоку от компрессора; иосновной дроссель, расположенный во впускном канале ниже по потоку от датчика газовой составляющей и выше по потоку от впускного коллектора.3. Система по п. 2, дополнительно содержащая:первый проток, соединяющий клапан продувки бачка (CPV) системы продувки паров топлива с впускным каналом ниже по потоку от датчика газовой составляющей, когда давление во впускном ...

СИСТЕМА ВПУСКА ВОЗДУХА ДЛЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение может быть использовано в двигателях внутреннего сгорания. Система (100) впуска воздуха для двигателя внутреннего сгорания содержит воздушный фильтр (1), который включает в себя фильтрующий элемент, внутреннюю камеру (3), и всасывающее отверстие (6) для соединения внутренней камеры (3) с всасывающим каналом (7) двигателя внутреннего сгорания. Воздух для горения течет через фильтрующий элемент во внутреннюю камеру (3) и из внутренней камеры (3) через всасывающее отверстие (6) во всасывающий канал (7). Двигатель выполнен с проходом подачи воздуха, который соединяет внутреннюю камеру (3) с передающим каналом двигателя для подачи дополнительного воздуха в передающий канал. Система (100) впуска воздуха дополнительно содержит средство (2) сопротивления потоку. Внутренняя камера (3), всасывающее отверстие (6) и всасывающий канал (7) образуют путь потока воздуха для горения. Средство (2) сопротивления потоку представляет собой пластиковую или резиновую пену, расположенную на пути потока ...

АДСОРБЕР ТОПЛИВНОЙ СИСТЕМЫ АВТОМОБИЛЯ

... 1. Адсорбер топливной системы автомобиля, содержащий цилиндрический корпус с размещенными на его крышке патрубками входа и выхода бензиново-воздушной смеси, слой адсорбирующего материала, расположенный внутри корпуса коаксиально с ним, и резервуар в днище корпуса для сбора жидкой фазы топлива, отличающийся тем, что адсорбирующий материал представляет собой полый цилиндрический блок, состоящий из активного угля и полимерного связующего и ограниченный с торцов кольцами из полимерного материала, при этом соотношение диаметра корпуса, внешнего и внутреннего диаметров блока составляет (5,5-11): (5-10): 1, отношение высоты блока к высоте резервуара равно (7-8) : 1 и отношение диаметра резервуара к диаметру корпуса составляет 1: (1,6-2,0). 2. Адсорбер по п. 1, отличающийся тем, что резервуар заполнен слоями эластичного сорбента.

СПОСОБ И СИСТЕМА ДЛЯ СОЗДАНИЯ РАЗРЕЖЕНИЯ С ПОМОЩЬЮ ДРОССЕЛЯ

СПОСОБ ОПРЕДЕЛЕНИЯ ОПТИМАЛЬНОЙ ПОГЛОЩАЮЩЕЙ СПОСОБНОСТИ АДСОРБЕРА ТРАНСПОРТНОГО СРЕДСТВА И АДСОРБЕР СИСТЕМЫ УЛАВЛИВАНИЯ ПАРОВ БЕНЗИНА

... 1. Способ определения оптимальной поглощающей способности адсорбера транспортного средства, заключающийся в том, что адсорбирующее вещество адсорбера насыщают газообразными углеводородами и, после того как процесс насыщения закончен, о чем свидетельствует регистрация выхода из адсорбера 2 г газообразных углеводородов, не поглощенных адсорбером, определяют их вес (B2,0), транспортное средство, в составе которого находится упомянутый адсорбер, приводят в движение (в частности, на беговых барабанах) согласно ездовым циклам, после чего определяют потерю веса (Вв) адсорбера в результате десорбции, затем определяют суммарное количество газообразных углеводородов при адсорбции (Bshed) за циклы выдержки транспортного средства в герметичной камере, имеющей возможность такой регистрации, отличающийся тем, что перед приведением транспортного средства в движение дополнительно регистрируют количество поглощенных адсорбером газообразных углеводородов (B0,1) в момент выхода не поглощенных газообразных ...

АДСОРБЕР УЛАВЛИВАНИЯ ПАРОВ БЕНЗИНА В ТОПЛИВНОЙ СИСТЕМЕ АВТОМОБИЛЕЙ

... 1. Адсорбер улавливания паров бензина из топливной системы автомобиля, содержащий корпус, а также донную и закрывающую части, адсорбирующий элемент, расположенный внутри корпуса, патрубки входа и выхода бензиновоздушной смеси, двухходовой электромагнитный клапан продувки, а также патрубок продувки, при этом корпус состоит из двух размещенных соосно одна в другой сообщающихся в нижней части емкостей, с внешней из которых сообщается патрубок выхода БВС, с внутренней - патрубок продувки, отличающийся тем, что закрывающая часть состоит из двух крышек с полостями для сбора конденсата, в первой из которых расположен патрубок входа, во второй - патрубок выхода БВС, кроме того клапан продувки интегрирован во вторую крышку, а патрубок входа БВС сообщается с внешней емкостью корпуса, а упомянутые крышки соединены с корпусом неразъемно.2. Адсорбер по п.1, отличающийся тем, что адсорбирующий элемент ограничен с торцов фильтрующими прокладками, выполненными из нетканого термоформованного материала.3 ...

Карбюратор

Адсорбер для улавливания бензиновых паров

CYANOACETIC ACID ESTERS AND THEIR PREPARATION

... 1,222,638. Cyanoacetic esters. PHILIPS' GLOEILAMPENFABRIEKEN N.V. 23 Oct., 1969 [26 Oct., 1968], No. 51928/69. Heading C2C. Cyanoacetic esters NC.CH 2 .COOR, where R is alkyl, alkenyl, cycloalkyl, aralkyl or aryl, are prepared by reacting a corresponding chloro- or bromo-acetic ester with an excess of sodium or potassium cyanide in the presence of acetonitrile. The cyanide, which may be present in up to 100%, preferably 25-50% excess, is employed in granules having a grain size of less than 1 mm., preferably less than 0À5 mm., and water may also be present, advantageously in an amount of 0À75 mole/mole haloacetic ester. The reaction is normally effected at from 40- 60‹ C., and examples detail the preparation of ethyl and tertiary butyl cyanoacetate from the corresponding chloroacetates using sodium cyanide.

FUEL INJECTION SYSTEM FOR COMBUSTION ENGINE

DRAIN RECYCLE SYSTEM FOR TWO-CYCLE ENGINE

Disclosed herein is a two-cycle internal combustion engine including a cylinder having a fuel intake port, an exhaust port, and an inlet port located intermediate the intake port and the exhaust port, a piston reciprocably mounted in the cylinder, a crankcase having a drains collecting area, and a conduit means connected in liquid communication with the drains collecting area and with the inlet port, whereby the drains are recycled or recirculated from the drains collecting area to the cylinder for ultimate combustion therein in response to the cyclical variation of pressure in the crankcase and in the cylinder. In a preferred embodiment, the conduit means includes a first conduit which is connected in liquid communication with the drains collecting area and with an upper bearing rotatably supporting the engine crankshaft and a second conduit which is connected in liquid communication with the upper bearing and with the inlet port such that the recirculating drains contact and lubricate ...

CATALYTIC REACTIVE COMPONENT REDUCTION SYSTEM AND METHODS

In accordance with the present invention, there are provided simplified systems and methods for catalytically deactivating, removing, or reducing the levels of reactive component(s) from the vapor phase of fuel storage tanks. The simple apparatus described herein can be utilized to replace complex OBIGGS systems on the market. Simply stated, in one embodiment of the invention, the vapor phase from the fuel tank is passed over a catalytic bed operated at appropriate temperatures to allow the reaction between free oxygen and the fuel vapor by oxidation of the fuel vapor, thus deactivating reactive component(s) in the gas phase.

CATALYTIC REACTIVE COMPONENT REDUCTION SYSTEM AND METHODS FOR THE USE THEREOF

... ²²²In accordance with the present invention, there are provided simplified ²systems and methods for catalytically deactivating, removing, or reducing the ²levels of reactive component(s) from the vapor phase of fuel storage tanks. ²The simple apparatus described herein can be utilized to replace complex ²OBIGGS systems on the market. Simply stated, in one embodiment of the ²invention, the vapor phase from the fuel tank is passed over a catalytic bed ²operated at appropriate temperatures to allow the reaction between free oxygen ²and the fuel vapor by oxidation of the fuel vapor, thus deactivating reactive ²component(s) in the gas phase.² ...

IN-LINE FLUID AGITATOR

An in-line agitating device for fluids includes an elongate internallythreaded cylindrical tube, open at each end, with a flow-disturber such as a round ball positioned inside the tube so as to substantially but not completely block off the bore of the tube. When a fluid is introduced into one end of the tube, its velocity increases as it is forced through the restricted space between the ball and the inner surface of the tube and then rapidly decelerates, causing turbulence which results in vigorous agitation of the fluid. This agitation is intensified by swirling action imparted to the fluid by the internal threading of the tube.

Round column type magnetic filtering device for separating oil from gas automatically for diesel engine

PROCEDE ET APPAREILLAGE POUR L'ALIMENTATION D'UN MOTEUR A COMBUSTION INTERNE A PARTIR D'UN RESERVOIR DE COMBUSTIBLE LIQUIDE VAPORISABLE DANS LES CONDITIONS D'UTILISATION ET ASSURANT UN MELANGE COMBUSTIBLE/COMBURANT EN PHASE GAZEUSE

L'INVENTION CONCERNE L'ALIMENTATION D'UN MOTEUR A EXPLOSION A PARTIR D'UN RESERVOIR DE COMBUSTIBLE LIQUIDE A POINT D'EBULLITION VOISIN DE LA TEMPERATURE AMBIANTE OU SUPERIEUR A CELLE-CI. SELON L'INVENTION, ON COMPRIME LE COMBUSTIBLE LIQUIDE PROVENANT DU RESERVOIR ET L'ON PROVOQUE ENSUITE SA DETENTE EN VUE DE LE GAZEIFIER EN AMONT DE L'ADMISSION D'AIR DU SYSTEME DE CARBURATION DU MOTEUR. APPLICATION: ALIMENTATION DU MOTEUR D'UN VEHICULE AUTOMOBILE A L'AIDE DE GAZ BUTANE.

aDDITIONAL DEVICE FOR [...] OF fUEL CONDENSATE.

EVAPORATIVE EMISSION CANISTER PURGE ACTUATION MONITORING SYSTEM

An evaporative emission canister purge actuation monitoring system (24, 124) includes an integrated valve body (26, 126) having a main flow passage (36, 136), a first one-way umbrella valve (40, 140) mounted to the valve body that is responsive to predetermined positive pressure in the main flow passage to control flow of fluid from a vapor canister to ambient air as well as a second one-way umbrella valve (42, 142) that is responsive to a predetermined negative pressure in the main flow passage to control the flow of ambient air through a fresh air port (34, 134). A vacuum actuated switch (46, 146) is supported by the integrated valve body and in electrical communication with a control unit. The switch (46, 146) is responsive to negative pressure in the main flow passage (36, 136) to send a signal indicative of the predetermined negative pressure to the control unit. COPYRIGHT KIPO & WIPO 2010 ...

Evaporative fuel emission control system

An evaporative fuel emission control system includes a canister that adsorbs fuel vapor generated in a fuel tank, a canister outgoing gas producing unit that causes a canister outgoing gas to flow out of the canister, a vapor condensing unit that condenses the canister outgoing gas to provide a processed gas containing a higher concentration of fuel vapor than that of the canister outgoing gas, and a processed gas passage through which the processed gas is fed to the fuel tank. A controller of this system is operable to restrict flow of the processed gas into the fuel tank when the fuel vapor concentration in the processed gas is lower than or is expected to be lower than a predetermined level.

Fluid flow through an integrated pressure management apparatus

An integrated pressure management system manages pressure and detects leaks in a fuel system. The integrated pressure management system also performs a leak diagnostic for the headspace in a fuel tank, a canister that collects volatile fuel vapors from the headspace, a purge valve, and all associated hoses and connections.

Integrated fuel tank and vapor containment system

A fuel tank for an engine that includes an air cleaner assembly and an air-fuel mixing device. The fuel tank includes a first tank portion and a second tank portion connected to the first tank portion to define a fuel chamber. A canister is at least partially formed as part of the second tank portion and a first flow path is at least partially formed as part of the first tank portion. The first flow path provides fluid communication between the fuel chamber and the canister. A second flow path is at least partially formed as part of the second tank portion to provide fluid communication between the canister and at least one of the air-fuel mixing device and the air cleaner assembly.

TANK SYSTEM FOR A MOTOR VEHICLE

A tank system (1) for a motor vehicle having an internal combustion engine to which fuel is supplied from a tank (2), wherein the tank (2) is assigned, in a ventilation path to the atmosphere (7), a flushable filter device (6, 6) for being loaded with hydrocarbon vapors of the fuel. The filter device (6, 6) has multiple mutually separate activated carbon filters (6). All of the activated carbon filters (6) are connected permanently in parallel. In this way, the ventilation resistance from the tank in the direction of the atmosphere can be kept low.

METHOD AND DEVICE FOR CHECKING THE OPERABILITY OF A TANK VENTING DEVICE FOR AN INTERNAL COMBUSTION ENGINE

The tank venting device has a fuel vapor reservoir connected to a fuel tank to deliver escaping fuel vapors to the fuel vapor reservoir, and is connected to the internal combustion engine in such a manner that during a tank venting operation the fuel vapors contained in the fuel vapor reservoir are delivered as regeneration gas. To check the operability of the venting device the fuel concentration in the regeneration gas is ascertained at a minimum of two different points in time during the venting operation. The fuel concentration values in the regeneration gas are compared with respective reference values representing the regeneration gas fuel concentration in the situation in which no additional fuel vapors are delivered during the venting operation. The assessment of the venting device operability is carried out by comparison of the values ascertained for the fuel concentration in the regeneration gas with the reference values.

Gravity-controlled constant-pressure and pressure-regulation device

A gravity-controlled constant-pressure and pressure-regulation device includes a canister, a weight block, and a seal head. The canister includes a metal layer, an epoxy resin layer, and a plastic sheet layer. The metal layer serves as an inner lining. The epoxy resin layer surrounds an outer circumference of the metal layer. The plastic sheet layer surrounds an outer circumference of the epoxy resin layer. The weight block is movably received in the canister. The metal layer has an inner surface movably and receivingly engages the seal head. The weight block is mounted to the seal head. The weight block is movable upward and downward inside the canister by being acted upon by a gravity force of weight thereof and a lifting force induced by an internal pressure inside the canister to effect mass storage of air inside the canister and stable supply air at constant pressure.

CANISTER WITH FUEL GAS REDUCING DEVICE

A canister for a motor vehicle is connected to a fuel tank and a throttle pipe to adsorb fuel gas containing noxious constituents, which are generated in a fuel tank. A first space and a second space, through which the fuel gas flows, are defined, the fuel gas flows in opposite directions through the respective first and second spaces, the second space is divided into space parts by a plurality of support filters, a fuel gas reducing device is installed in one space part, which is delimited by two support filters, and air flow through the fuel gas reducing device is perpendicular to air flow through the first and second spaces.

CANISTER ARRANGEMENT IN POWER GENERATING APPARATUS

A power generating apparatus has a frame, an engine disposed inwardly of the frame and configured to drive a generator, a fuel tank for storing fuel to be supplied to the engine, and a canister containing an adsorbent for adsorbing fuel vapor from the fuel tank. The canister includes a communicating tube, which places the canister in communication with the atmosphere. The canister is also in communication with an intake system. The canister is movably positioned in a space S between the frame and the intake system so as to prevent an increase in the size of the power generating apparatus when the canister is added to the power generating apparatus.

LEAK DIAGNOSTIC APPARATUS FOR AN EVAPORATIVE EMISSION CONTROL SYSTEM

A leak diagnostic apparatus is provided for an evaporative emission control system that purges fuel vapor from an inside of a fuel tank to an intake passage of an internal combustion engine. The leak diagnostic apparatus is basically provided with a pressure detecting device and a leak determining device. The pressure detecting device is configured and arranged to detect a pressure inside the evaporative emission control system, which includes the fuel tank. The leak determining device sets a leak determination threshold value in accordance with a deformation amount of the fuel tank, and determines if a leak exists by comparing the pressure inside the evaporative emission control system while the evaporative emission control system is sealed to the leak determination threshold value.

Hydrocarbon fuel vapour filter system

A hydrocarbon vapour filter system for capturing vapour released from a fuel tank. The system contains a vapour line in vapour-tight communication with the fuel tank, having a vapour capture segment for capturing fuel vapour, and in the preferred embodiment a purging stage releasing the fuel vapour. During engine operation captured fuel vapour can be released from the vapour capture line into air drawn into the engine intake manifold.

Hydrocarbon Storage Canister Purge System and Method

A hydrocarbon canister purge system includes a hydrocarbon storage canister, a fuel tank disposed in fluid communication with the hydrocarbon storage canister, an engine disposed in fluid communication with the hydrocarbon storage canister, a hydrocarbon sensor provided in the hydrocarbon storage canister and a controller disposed in signal-receiving communication with the hydrocarbon sensor and in signal-transmitting communication with the engine.

Evaporative Emission Management For Vehicles

Evaporative emissions management for a vehicle having a fuel tank and a low-vacuum internal combustion engine, including hybrid electric vehicles, include first and second canisters with the second canister disposed between the first canister and atmosphere. A refueling valve routes fuel vapors from the fuel storage tank through the first canister, and to the second canister when the first canister becomes saturated, during refueling. Other than during refueling, the refueling valve is closed to route fuel vapors around the first canister and directly into the second canister. First and second purge valves are controlled during canister regeneration or purging so air from atmosphere is routed primarily through the second canister to the engine to purge the second canister before the purge valves are operated to route air from atmosphere through both the second and first canisters to purge the first canister.

Fuel tank valve device and fuel tank ventilation device

A fuel tank valve device equipped with a casing, and a valve mechanism. The valve mechanism has a first valve unit having a first valve connecting hole, and a second valve unit that opens and closes the first valve connecting hole. The first valve unit completely closes the valve flow path by moving by the force in the valve closing direction when the pressure of the second communication path exceeds a preset first pressure value. In a state when the first valve unit is closing the valve flow path, when the pressure of the second communication path exceeds a preset second pressure value that is greater than the first pressure value, the second valve unit receives the pressure from the first valve connecting hole and moves to open the first valve connecting hole, communicating with the valve flow path.

FUEL RECOVERY SYSTEM

A fuel recovery system for a machine is disclosed. The fuel recovery system may have a tank configured to store a liquid fuel. The fuel recovery system may also have an accumulator fluidly connected to the tank and configured to receive gaseous fuel formed in the tank. The fuel recovery system may further have a compressor fluidly connected to the accumulator and configured to compress the gaseous fuel. In addition, the fuel recovery system may have a separator fluidly connected to the compressor and the tank. The separator may be configured to receive the compressed gaseous fuel, and separate the compressed gaseous fuel into a first flow of gaseous fuel at a first temperature and a second flow of gaseous fuel at a second temperature. In addition, the separator may be configured to direct the second flow to the tank.

Filter apparatus for recovering vapour from the fuel in a vehicle

Filter apparatus (1) in which a filter (2) having an outer casing (3) and adapted to condense the fuel vapour to form a mass of liquid fuel is connectable to the vehicle body by a U-shaped bracket (12) having a pair of arms (13) which end in respective elongate bodies (15) snap-engaged in respective seats (7) in the outer casing of the filter (2) itself; the mass of liquid fuel resulting from the vapour is withdrawn from the filter (2) under the control of a solenoid valve (27) which is connected directly to the casing (3) by a snap-attachment device (30) having a guide member (31) integral with the outer casing (3) and a slide member (32) carried by the solenoid valve (27). ...

СПОСОБ РАБОТЫ ТОПЛИВНОЙ СИСТЕМЫ (ВАРИАНТЫ) И ТОПЛИВНАЯ СИСТЕМА ТРАНСПОРТНОГО СРЕДСТВА

Изобретение может быть использовано в системе управления двигателем внутреннего сгорания. Предложены способы и система для создания достаточного разрежения в топливном баке для выявления утечек. В то время как давление в топливном баке 20 находится в его механических пределах, пары топлива продуваются из бачка 22 в двигатель 10 с открытым изолирующим клапаном 110 для создания требуемого уровня разрежения в топливном баке 20. После этого топливный бак изолируется путем закрытия изолирующего клапана 110, и одновременно с продувкой осуществляется выявление утечек. 3 н. и 15 з.п. ф-лы, 5 ил.

СПОСОБ ВЫПУСКА ПАРОВ ТОПЛИВА ИЗ АДСОРБЕРА ВО ВПУСКНОЙ КОЛЛЕКТОР ДВИГАТЕЛЯ (ВАРИАНТЫ)

Изобретение может быть использовано в двигателях внутреннего сгорания. Способ выпуска паров топлива из адсорбера (150) во впускной коллектор (46) двигателя (10) заключается в том, что когда при выпуске паров топлива из адсорбера (150) накопленные пары топлива превышают пороговое значение, уменьшают величину открытия дроссельной заслонки (64) двигателя (10) и увеличивают уровень наддува, создаваемого компрессором (162), соединенным с двигателем (10). Раскрыт вариант способа выпуска паров из адсорбера. Технический результат заключается в увеличении потока паров топлива из адсорбера во впускную систему двигателя. 2 н. и 8 з.п. ф-лы, 5 ил.

СПОСОБ ПОДАЧИ ТОПЛИВОВОЗДУШНОЙ СМЕСИ В ЦИЛИНДРЫ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к области двигателестроения и позволяет повысить экономичность карбюраторного двигателя внутреннего сгорания за счет более полного сгорания топлива в цилиндрах двигателя. Возможность такого сгорания обеспечивается очисткой топливовоздушной смеси перед поступлением в цилиндр от крупных капель топлива, поступающих в поток со стенок впускного трубопровода и присутствующих в нем после смесеобразования. В цилиндры подается топливо либо в парообразном виде, либо в виде аэрозолей, что способствует полному сгоранию топлива в процессе работы двигателя внутреннего сгорания.

АДСОРБЕР УЛАВЛИВАНИЯ ПАРОВ БЕНЗИНА

Изобретение относится к области экологии автомобильного транспорта и может быть использовано для улавливания паров бензина, испаряющихся из топливной системы автомобилей бензобака, карбюратора, камеры впрыскивания. Изобретение позволяет повысить степень десорбции паров бензина при эксплуатации адсорбера на 40-50% и упростить его конструкцию. Предложен адсорбер, содержащий цилиндрический корпус с размещенными на его крышке патрубками входа и выхода бензино-воздушной смеси и воздуха, полый сорбирующий блок, расположенный внутри корпуса коаксиально с ним и снабженный с торцов кольцами с бортиками, резервуар для сбора жидкой фазы и герметизирующую прокладку, причем нижнее и верхнее кольца блока снабжены выступами, входящими в полость блока, патрубок воздуха входит в полость через выступ верхнего кольца и уплотнен прокладкой кольцевой формы. Патрубки входа и выхода бензино-воздушной смеси разделены. 4 з.п. ф-лы, 2 ил.

АДСОРБЕР

Изобретение может быть использовано в автомобилестроении и обеспечивает поглощение паров топлива из топливного бака. Адсорбер содержит герметичный корпус, ограниченный верхней и нижней частями, внутри которого находится адсорбирующее вещество. В верхней части имеются три патрубка: подвода, отвода паров топлива и патрубок, связывающий внутреннюю часть адсорбера с атмосферой. В нижней части находится емкость (ловушка) для сбора жидкого топлива (конденсата). В патрубке топливных паров имеется сужение его проходного сечения. Сужение выполнено на горизонтальном участке патрубка и выше его горизонтальной оси. Площадь проходного сечения сужения S1=(0,03-0,08)S, где S - площадь проходного сечения патрубка подвода паров топлива. Технический результат - повышение эффективности адсорбера, уменьшение токсичности за счет уменьшения количества топлива, попадаемого в емкость (ловушку). 1 з.п. ф-лы, 4 ил.

Видоизменение охарактеризованного в патенте № 15873 приспособления для подачи топлива к карбюраторам двигателей внутреннего горения под постоянным напором

Адсорбер для улавливания паров топлива

Изобретение позволяет повысить эффективность работы путем равномерного распределения паров по объему адсорбента (А). Адсорбер содержит полый корпус (К) 1 с донным элементом 2 и герметично закрепленной на нем вертикальной перегородкой 3, делящей внутреннюю полость К 1 на две камеры 4 и 5, заполненные А 6 и сообщенные между собой через окно, образованное перегородкой 3 и К 1. В камере 4 расположен выходной участок подводящего патрубка 7, выполненный в виде змеевика 8 с перфорацией 9, расположенного в К 1 не выше верхнего края вертикальной перегородки 3, а в нижней части камеры 5 имеется вентиляционное отверстие 10 с фильтрующим элементом 11. При выключении из работы прогретого двигателя внутреннего сгорания образующаяся во впускном тракте смесь из испаряющегося жидкого топлива и воздуха попадает в камеру 4 и равномерно распределяется по А 6, причем пары топлива не выходят в атмосферу, так как отверстие 10 расположено внизу. При пуске двигателя через последнее всасывается атмосферный воздух ...

Система питания для двигателя внутреннего сгорания

Изобретение позволяет исключить попадание паров топлива в атмосферу. Система питания для двигателя содержит воздухоочиститель 1 с заборным патрубком 2, карбюратор 3 на впускном трубопроводе 5, адсорбер 6 с вентиляционным отверстием 7, поворотную заслонку 8 с приводом 9, подводящую магистраль 11 с вакуумным устройством (У) 14 и запорным клапаном (К) 10 и отводящую магистраль 12 с обратным К 20. Цепь 15 управления У 14, имеющая термодатчик 16 и переключатель 17, сблокирована через провода 19 с приводом К 10, а привод 9 через провода 21 подключен к переключателю 17. При выключении требуемого двигателя цепь 15 управления через термодатчик 16 и переключатель 17 соединяется с источником 18 питания. Заслонка 8 перекрывает патрубок 2, К 10 открывается, а работающее У 14 отсасывает пары топлива из полости 13, поступающие вследствие испарения его жидкой фазы со стенок карбюратора 3, впускного трубопровода 5 и поплавковой камеры 4. У 14 направляет пары в адсорбер, уменьшая давление во впускном тракте ...

Vorrichtung zur Verminderung der schaedlichen Abgas-Emission von Brennkraftmaschinen

Kraftstoffdampfsteuerungssystem für einen Verbrennungsmotor

Kraftstoffdampfsteuerungssystem für einen Verbrennungsmotor, umfassend: einen Kanister zur Absorption von in einem Kraftstofftank entstandenem Kraftstoffdampf, wobei besagter Kanister auf einem Kraftstoffdampfsteuerungsdurchgang angeordnet ist, der mit einem Ansaugdurchgang für den Motor und dem Kraftstofftank in Verbindung steht; einen zur Atmosphäre offenen Durchgang, welcher den Kanister mit der Atmosphäre verbindet; ein Abführventil, das zwischen dem Ansaugdurchgang für den Motor und dem Kanister angeordnet ist; eine Abführsteuerungseinheit, die dazu konfiguriert ist, das Abführventil selektiv zu steuern, so dass der absorbierte Kraftstoffdampf von dem Kanister abgeführt und dem Ansaugdurchgang für den Motor zugeführt wird; und ein Leckprüfungssystem zur Untersuchung von Leckage in dem Kraftstoffdampfsteuerungssystem durch Erzeugung eines Unterdrucks in dem Kraftstoffdampfsteuerungssystem, wenn der Motor stillsteht; dadurch gekennzeichnet, dass das Leckprüfungssystem in einem Werktestmodus ...

Steuerung eines Fahrzeugmotors mit einer elektrischen Vorverdichtungsvorrichtung

Die Erfindung betrifft ein Verfahren zum Betreiben eines Fahrzeugs beim Kaltstart eines Motors. Der Motor kann wenigstens einen Zylinder, eine Vorverdichtungsvorrichtung, um Einlassluft zu dem wenigstens einen Zylinder vorzuverdichten, einen Kraftstofftank, einen Kraftstoffdampfbehälter, um vom Kraftstofftank abgegebene Kraftstoffdämpfe zu speichern, und eine Emissionssteuervorrichtung, um Abgas von dem Motor zu behandeln, enthalten. Die Vorverdichtungsvorrichtung enthält einen Kompressor, der wenigstens teilweise durch einen Elektromotor angetrieben wird. Das Verfahren enthält während einer Motorkaltstartbedingung das Betreiben des Elektromotors der Vorverdichtungsvorrichtung, um Einlassluft vorzuverdichten, das Leiten der vorverdichteten Einlassluft durch den Kraftstoffdampfbehälter, um im Kraftstoffdampfbehälter gespeicherten Kraftstoffdampf abzugeben, das Leiten des Kraftstoffdampfs von dem Kraftstoffdampfbehälter zu dem Motor und das Ausführen einer Verbrennung in dem wenigstens einen ...

Drei-Wege-Ventil

Ein Ventil (20, 20'), aufweisend: einen Ventilkörper (40), der einen ersten Anschluss (1), einen zweiten Anschluss (2) und einen dritten Anschluss (3) aufweist, wobei der erste Anschluss (1) eine erste Ventilöffnung (48) und der zweite Anschluss (2) eine zweite Ventilöffnung (50) aufweist; ein erstes Ventilverschlusselement (44) zur selektiven Abdichtung einer ersten Ventilöffnung (48) und ein zweites Ventilverschlusselement (46) zur selektiven Abdichtung einer zweiten Ventilöffnung (50); ein Solenoid (42), das eine erste Spule (52) und eine zweite Spule (54) aufweist, wobei zumindest eine Spule der ersten Spule (52) und der zweiten Spule (54) zumindest ein Ventilverschlusselement des ersten Ventilverschlusselements (44) und des zweiten Ventilverschlusselements (46) betätigt, wenn diese mit Strom versorgt wird; eine elektrische Verbindung zur selektiven und einzelnen Versorgung der ersten Spule (52) und der zweiten Spule (54) mit Strom; wobei das Ventil (20, 20') für den Betrieb von zumindest ...

Improved means for clearing the inlet pipe of a carburettor

... 190,453. Rateau, A. Dec. 19, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Spray carburettors. -Petrol which accumulates on the walls or is ejected in excess from the nozzles of carburettors to which air is supplied under pressure, is collected and discharged by pro. viding in the lowest part of the air passage a cup containing a float valve. The air passage a of carburettor b has at the lowest part of its bend a cup c containing a float d actuating a valve e on a discharge pipe f. One cup may serve several carburettors.

Improvements in Carburetters for Internal Combustion Engines.

... 118,946. Inglis, F. G. Nov. 20, 1917 Spray carburettors.- Air enters at 2, passes downwardly through a movable valve 4 and over a conical nozzle 10, and the mixture escapes at 3. The valve 4 has a lateral inlet aperture 6, or it may have apertures in its upper end, and its interior surface is so shaped as to provide, during its adjustment, a varying passage or choke adjacent the fuel delivery orifices 16. The fuel is supplied through a pipe 11 from a float chamber which maintains the level just below the orifices 16, and the quantity flowing is regulated by a needle valve 13 screwed through the cover 18 and the spindle 5 of which serves as a guide for the valve 4. The lower end of the valve 4, in its closed position, rests on a seating 9 formed in a well 21 in which fuel may be made to collect and from which it is drawn to the engine at starting together with air admitted through holes 22. A drain 23 discharges into a sealed tank 25 which may be formed integral with the carburettor. An ...

Improvements in Carburettors for Internal Combustion Engines.

... 18,138. Delieuvin, P. A. M. Aug. 12, 1910, [Convention date]. Spray carburettors.-Paraffin &c. drawn up a pipe f is sprayed by air or exhaust gases from a pipe a; the central part of the mixture jet passes into the induction pipe j, but the surrounding parts of the jet containing unatomized fuel is arrested by a cowl i. As shown, a taneously controlled. A sleeve q is used to regulate the supplementary-air inlets.

ATOMIZATION DEVICE.

Vapor processing apparatus

A vapor processing apparatus includes a tank-inner-pressure detector, an atmospheric-pressure detector, a canister, a control valve and a controller. The tank-inner-pressure detector is configured to detect tank inner pressure of a fuel tank retaining fuel to be supplied to an engine. The atmospheric-pressure detector is configured to detect atmospheric pressure. The canister is configured to adsorb and collect vapor generated in the fuel tank. The control valve is disposed in a vapor channel connected to the fuel tank. The controller is configured to control opening and closing of the control valve based on a value detected by the tank-inner-pressure detector, a value detected by the atmospheric-pressure detector, and a correction value learned in advance, when in a predetermined state.

Apparatus having a canister and a component associated with the canister

An apparatus including a canister and an accessory component associated with the canister. The canister may be filled with an adsorption material for adsorbing fuel vapor generated within a fuel tank. A communicating pipe extends downwardly from a housing of the accessory component for communication with the canister. An engaging protrusion is provided on an outer peripheral surface of the housing. An outer peripheral portion of an upper portion of the canister includes a wall portion for engagement with the engaging protrusion.

Evaporative fuel treatment device

A purge valve and an atmosphere opening valve are closed at a timing for stopping purge, so that a canister is sealed from an atmosphere. Thus, even when purge is stopped, the interior of the canister can be held in a negative pressure state. Therefore, adsorbed fuel does not return to inner depths of pores of an adsorbent, thus maintaining a state where the fuel is present on a surface side of the adsorbent. Thus, when purge is resumed, fuel vapors are swiftly discharged to an intake passage of an internal combustion engine via a purge passage. Thereafter as well, fuel vapors continue to be discharged due to the fuel rising to the surface from the inner depths of the pores of the adsorbent. When purge is thus resumed, fuel vapors are immediately discharged from the canister with no time lag.

Solenoid valve

First and second valve members are received in a valve receiving chamber, which is connected to an inlet passage and an outlet passage. First and second valve seats are annular and are formed at a connection of the valve receiving chamber to the outlet passage. The second valve member is lifted away from the second valve seat synchronously with lift movement of the first valve member upon energization of an electromagnetic drive arrangement when a force, which is determined based on an applied pressure force applied to the second valve member by a differential pressure between a pressure of the inlet passage and a pressure of the outlet passage and urging forces of the first and second urging members, is smaller than an electromagnetic attractive force.

Hydrocarbon storage canister

A system for a vehicle is provided herein. The system includes a fuel vapor canister comprising a shell, a compression plate within the shell and an end cap. The end cap includes a double sided spring interface and a double sided shell sealing surface having double sided identical grooves, only one of which is sealed to the shell. The system further includes a spring coupled to the compression plate and only one spring interface.

Purging Device for Fuel Vapors During Idling Stop of Internal Combustion Engine

Disclosed is an engine control unit intended to prevent fuel vapors from a fuel tank from being released to the atmosphere and causing degradation of gas emission performance. In order to fulfill the object, a control unit according to an aspect of this invention includes means for discharging the fuel from a purging device constructed to adsorb the fuel vapors that rise from the fuel tank, and discharge the adsorbed fuel vapors into an air intake pipe, to an upstream side of a catalyst provided in an exhaust pipe, and when the control unit stops the engine that is running idle, the unit drives the discharge means to accelerate purification of the fuel vapors by sending the vapors to the catalyst under an active state immediately after the engine stop. 12.-. (canceled)3. A control unit for an internal combustion engine of a vehicle equipped with a purging device to adsorb , into an adsorption tank , fuel vapors that have occurred in a fuel tank , and discharge the fuel vapors according to conditions of the engine ,wherein the vehicle further includes fuel discharge means to forcibly discharge the fuel vapors to an upstream side of a catalyst provided in an exhaust pipe of the vehicle;wherein the control unit controls the fuel discharge means after the internal combustion engine is stopped but while the catalyst is active so that the fuel vapors may be discharged; andwherein the vehicle further includes an electrically driven supercharger as the fuel discharge means, and a passageway extending from the purging device and communicating with an upstream side of the supercharger, thereby driving the supercharger discharges to discharge the fuel.4. The control unit for an internal combustion engine according to claim 3 ,wherein, when the control unit conducts the discharge control, the unit estimates the quantity of oxygen occluded in the catalyst and determines whether to execute fuel discharge control from the estimated quantity of occlusion.5. The control unit for an ...

Method and system for fuel vapor control

Methods and systems are provided for generating sufficient vacuum to enable a leak detection routine. While a fuel tank pressure is within mechanical limits, fuel vapors are purged from a canister to an engine with an isolation valve open to generate a desired level of vacuum in the fuel tank. Thereafter, the fuel tank is isolated and leak detection is performed concurrent to the purging.

OPTIMIZATION OF TANK VENTING OF A FUEL TANK

A system () for optimizing tank venting of a fuel tank () is presented. The system () has a temperature sensor (), a closed-loop control unit () and a tank venting unit (). The temperature sensor () is arranged directly in the fuel tank () and is designed to determine a current fuel temperature of a fuel () present in the fuel tank (). The closed-loop control unit () is connected to the temperature sensor () and to the tank venting unit () and is designed to read out the current fuel temperature from the temperature sensor (). The closed-loop control unit () is furthermore designed to control the tank venting unit () in accordance with the loading of the activated carbon filter, which in turn depends on the time profile of the fuel temperature. 1131. A system () for optimizing tank venting of a fuel tank () , the system () comprising:{'b': 7', '5', '3, 'a temperature sensor (), which is designed to determine a current fuel temperature of a fuel () present in the fuel tank ();'}{'b': 9', '7, 'a closed-loop control unit (), which is designed to read out the current fuel temperature from the temperature sensor () and to determine a time profile of the fuel temperature; and'}{'b': 11', '7', '11', '9, 'a tank venting unit (), wherein the temperature sensor () and the tank venting unit () are connected to the closed-loop control unit ();'}{'b': 7', '3', '9', '11, 'wherein the temperature sensor () is arranged in the fuel tank () and the closed-loop control unit () is designed to control the tank venting unit () in accordance with the time profile of the fuel temperature.'}211353. The system () according to claim 1 , further comprising a filling level measuring unit () claim 1 , which is designed to determine a filling level of the fuel () in the fuel tank ();{'b': 13', '9', '15, 'wherein the filling level measuring unit () is connected to the closed-loop control unit () by a digital or analog interface (); and'}{'b': 7', '13, 'wherein the temperature sensor () is ...

MICROCONDENSER DEVICE AND EVAPORATIVE EMISSION CONTROL SYSTEM AND METHOD HAVING MICROCONDENSER DEVICE

A microcondenser device for an evaporative emission control system includes a housing having an inlet for receiving fuel vapor and a condensation outlet for discharging condensed fuel vapor, and a porous element disposed in the housing and fluidly interposed between the inlet and the condensation outlet for absorbing the fuel vapor received through the inlet. The microcondenser device further includes a thermoelectric element in thermal contact with the porous element for removing heat from the fuel vapor absorbed by the porous element to condense the fuel vapor. 1. A microcondenser device for an evaporative emission control system , comprising:a housing having an inlet for receiving fuel vapor and a condensation outlet for discharging condensed fuel vapor;a porous element disposed in the housing and fluidly interposed between the inlet and the condensation outlet for absorbing the fuel vapor received through the inlet;a thermoelectric element in thermal contact with the porous element for removing heat from the fuel vapor absorbed by the porous element to condense the fuel vapor.28-. (canceled)9. The microcondenser device of wherein the porous element is a porous metal claim 1 , a porous metal alloy claim 1 , or a carbon foam.10. The microcondenser device of wherein the porous element is a microporous aluminum foam.11. The microcondenser device of wherein the porous element has a varying porosity including an increased porosity adjacent the inlet relative to a porosity adjacent the condensation outlet.1218-. (canceled)19. The microcondenser device of wherein the housing is formed of aluminum which facilitates higher heat transfer from the fuel vapor to the thermoelectric element.20. The microcondenser device of wherein the porous element includes at least one chamber therein.21. The microcondenser device of wherein the porous element is provided with a first side and a second side opposite the first side claim 20 , the second opposite side having an opening to the ...

FUEL TANK

The present invention enables a canister in a fuel tank with the canister to be separately subjected to a product inspection and enables the canister to be replaced. 15-. (canceled)6. A fuel tank comprising:a tank body configured by joining a plurality of shells to each other; anda canister configured to enable adsorption of fuel vapor generated in the tank body,wherein, on an inner wall surface of one of the shells that constitute the tank body, an engaging portion formed to be integrated with the shell is provided, andthe canister is configured to be mounted to an inside of the tank body by engaging an engaged portion of the canister with the engaging portion.7. The fuel tank according to claim 6 ,wherein a vapor passage which guides the fuel vapor generated in the tank body to the canister in the tank body, and an inflow regulating valve which is provided in the vapor passage and prevents liquid fuel in the tank body from flowing into the canister are integrated with the canister.8. The fuel tank according to claim 6 ,wherein, when the engaged portion of the canister is engaged with the engaging portion formed on the inner wall surface of the shell, an atmosphere port and a purge port of the canister are configured to be respectively inserted into an atmosphere port connection portion and a purge port connection portion which are formed in the shell so as to be connected.9. The fuel tank according to claim 6 ,wherein the plurality of shells include an upper shell that constitutes an upper portion of the tank body and a lower shell that forms a lower portion of the tank body, andthe canister is mounted to an inside of the upper shell at a position higher than an upper limit position of a liquid level of the fuel. The present invention relates to a fuel tank which includes a task body configured by joining a plurality of shells to each other, and a canister configured to enable adsorption of fuel vapor generated is the tank body.A technique related to the tank ...

SADDLE-TYPE VEHICLE

A saddle-type vehicle is provided with: a seat on which a driver sits; a fuel tank positioned in front of the seat; an engine positioned below the fuel tank and having a crankcase and a cylinder projecting upward from a front of the crankcase; and a fuel vapor passage that is connected to the fuel tank and emits evaporated fuel in the fuel tank to an outside of the fuel tank. At least a part of the fuel vapor passage passes behind the cylinder. The fuel vapor passage is connected to the crankcase at a portion in a rear side of the cylinder and opens toward oil in the engine. 1. A saddle-type vehicle comprising:a seat on which a driver is seated;a fuel tank disposed in front of the seat;an engine disposed below the fuel tank and including a crankcase and a cylinder protruding upward from a front portion of the crankcase; anda fuel vapor passage connected to the fuel tank and configured to discharge evaporated fuel in the fuel tank to an outside of the fuel tank,wherein at least a part of the fuel vapor passage passes behind the cylinder, and the fuel vapor passage is connected to the crankcase at a portion in a rear side of the cylinder and opens toward oil in the engine.2. The saddle-type vehicle according to claim 1 , further comprising:an intake device extending rearward from the cylinder and including an inlet pipe, a throttle body, a connecting tube, and an air cleaner box; andan air introduction passage connecting part provided in a middle of the fuel vapor passage and connected to an air introduction passage for introducing air into the fuel vapor passage,wherein the air introduction passage connecting part is placed below the fuel tank and also in front of the air cleaner box.3. The saddle-type vehicle according to claim 2 , further comprising:a first check valve provided in a middle of the fuel vapor passage and configured to stop a flow from the engine side toward the fuel tank side,wherein the air introduction passage connecting part and the first check ...

TRAP CANISTER FOR ADSORBING FUEL VAPOR

Embodiments of the invention are directed towards a trap canister for adsorbing fuel vapor contained in breakthrough gas discharged from a main adsorbent canister. The main adsorbent canister is connected to a fuel tank has a case defining an adsorption chamber therein and an adsorbent filled in the adsorption chamber. The case has a first end open to the atmosphere and a second end for introducing breakthrough gas into the adsorption chamber. The adsorbent filled in the adsorption chamber adsorbs the fuel vapor contained in the breakthrough gas. The trap canister further has a bypass path for bypassing the adsorption chamber and a valve configured to block the bypass path and to allow for opening during refueling. This prevents the fuel vapor from flowing into the atmosphere during normal operation while also decreasing pressure loss during refueling. 1. A trap canister for adsorbing fuel vapor contained in a breakthrough gas discharged from a main adsorbent canister which is connected to a fuel tank , comprising:a case defining an adsorption chamber therein and having a first end open to the atmosphere and a second end for introducing the breakthrough gas into the adsorption chamber;an adsorbent filled in the adsorption chamber and being capable of adsorbing and desorbing the fuel vapor contained in the breakthrough gas;a bypass path for bypassing the adsorption chamber; anda valve configured to block the bypass path and which can open during refueling.2. The trap canister according to claim 1 , further comprisinga negative pressure generator configured to generate negative pressure by using gas Flow in the bypass path during refueling;wherein the valve is composed of a diaphragm valve configured to be opened by pressure of the gas flowing through the bypass path and wherein the negative pressure generator communicates with the diaphragm valve in order to cause the negative pressure to act on the diaphragm valve.3. The trap canister according to claim 1 , wherein ...

SENSING DEVICE FOR CANISTERS

Sensing device for canister has canister sensor that detects state of activated carbon filling an inside of casing of the canister. Peripheries of temperature sensing element and current application unit of the canister sensor which are arranged in the casing are covered in non-conductive thick insulating material Root portion which is covered in the insulating material of heat transfer plate having high heat conductivity is arranged with the root portion being adjacent to the temperature sensing element in order to increase sensor sensitivity by increasing heat transfer. Top end portion which protrudes from the insulating material of the heat transfer plate is exposed to the inside of the casing Insulating layer is formed at least on surface of the root portion of the heat transfer plate by surface treatment. 18-. (canceled)9. A sensing device for a canister whose casing is filled with an adsorbent to adsorb an evaporated fuel , the sensing device comprising:a canister sensor that detects a state of the adsorbent filling an inside of the casing of the canister, the canister sensor havinga temperature sensing element;a current application unit that applies current to the temperature sensing element;a non-conductive insulating material that covers peripheries of the temperature sensing element and the current application unit which are arranged in the casing; anda heat transfer plate having a heat conductivity that is higher than at least that of the insulating material, and whereina root portion, which is covered in the insulating material, of one end side of the heat transfer plate is arranged with the root portion being adjacent to the temperature sensing element, anda top end portion, which protrudes from the insulating material, of the other end side of the heat transfer plate is exposed to the inside of the casing filled with the adsorbent.10. The sensing device for the canister as claimed in claim 9 , wherein:a pair of the heat transfer plates are provided so ...

EVAPORATED FUEL TREATING APPARATUS

An evaporated fuel treating apparatus, comprising a passage allowing circulation of fluid inside, a tank port and a purge port at one end of the passage, and an atmospheric port at the other end of the passage, and provided with a plurality of adsorption chambers each filled with granular activated carbon or crushed activated carbon in the passage, and a support member set between a first adsorption chamber located closest to the atmospheric port in the plurality of adsorption chambers and a second adsorption chamber located on the tank port side of the first adsorption chamber in the plurality of adsorption chambers, to space the first and second adsorption chambers apart from each other, and at least a part of the support member can adsorb evaporated fuel components. With this configuration, evaporated fuel components escaping to the outside through the atmospheric port are reduced. 1. An evaporated fuel treating apparatus whereina passage is formed to circulate fluid inside, a tank port and a purge port are formed at one end of said passage, and an atmospheric port is formed at another end of said passage;a plurality of adsorption chambers which are each filled with one of granular activated carbon and crushed activated carbon are provided in said passage;a support member is set between a first adsorption chamber, which is located closest to the atmospheric port, of said plurality of adsorption chambers and a second adsorption chamber, which is located on the tank port side of said first adsorption chamber, of said plurality of adsorption chambers, to space said first and second adsorption chambers apart from each other; and,at least one part of said support member can adsorb an evaporated fuel component.2. The evaporated fuel treating apparatus according to claim 1 , wherein an amount of evaporated fuel component adsorbed per unit space volume of a part having adsorption capability of said support member is smaller than an amount of evaporated fuel component ...

CANISTER EQUIPPED WITH HEATER

The invention provides a canister for reducing emissions of fuel gas. Fuel gas absorbed onto active carbon inside a canister can be easily desorbed from the active carbon and then flow into canister in the engine. The canister, which is combined with fuel tank and throttle pipe for absorption and desorption of fuel gas generated in fuel tank, has following components: a fuel tank port and an air inlet formed at the upper end of one side; a junction pipe arranged in upper parts of this side; a canister body with a plurality of convex is formed; a junction configured to fit the junction pipe on the canister body formed at upper end of the canister body and a plurality of hooks connected with a plurality of convexes on the canister body are provided; air inlet set on an upper side, a heater with a heater module is set inside. 1. A canister for use with a fuel tank and a throttle pipe to absorb fuel gas from the fuel tank , comprising:a fuel tank port and an air inlet disposed at an upper end of one side of the canister;a junction pipe and a canister body with a plurality of junction convexes are arranged on the one side;a junction configure to fit the junction pipe is formed at an upper end of the canister body, wherein the junction is configured with a plurality of hooks for connection with a plurality of junction convexes on the canister body;an air inlet is deployed at the upper end of the canister body; anda heater connected with a heater module is set inside the canister.2. The canister of claim 1 , further comprising a groove on an outer side of junction pipe for inserting a gland strip.3. The canister of claim 1 , wherein the heater comprises an opening set on a lower side of the heater and a heater body with junction holes to hold the heater module claim 1 , wherein the heater module is horizontally inserted into a junction hole in an upper part on one side of the heater body.4. The canister of claim 3 , wherein the heater module comprises a junction plate ...

EVAPORATED FUEL TREATMENT APPARATUS

In an evaporated fuel treatment apparatus mounted laterally, in order to effectively utilize adsorbent of an upper portion in an adsorption chamber of the evaporated fuel treatment apparatus, the evaporated fuel treatment apparatus comprises: one or more adsorption chambers filled with the adsorbent that adsorbs and desorbs evaporated fuel generated in a fuel tank; a tank port; a purge port; and an atmosphere port, and in the evaporated fuel treatment apparatus, a first filter is provided in a boundary portion between the adsorption chamber located closest to the tank port and the tank port, and an amount of gas, having flowed in the adsorption chamber from the tank port, passing through an upper portion of the first filter is made larger than that of the gas passing through a lower portion thereof. 1. An evaporated fuel treatment apparatus comprising: at least one adsorption chamber filled with adsorbent that adsorbs and desorbs evaporated fuel generated in a fuel tank; a tank port; a purge port; and an atmosphere port , said evaporated fuel treatment apparatus being laterally mounted so that the evaporated fuel moves in a lateral direction in said adsorption chamber ,wherein a first filter is provided in a boundary portion between an adsorption chamber located closest to the tank port in said adsorption chambers and said tank port, and an amount of gas, having flowed in the adsorption chamber from the tank port, passing through an upper portion of the first filter is larger than that of as passing through a lower portion thereof.2. The evaporated fuel treatment apparatus according to claim 1 , wherein an air-flow resistance of an upper portion of said first filter is made smaller than that of a lower portion thereof claim 1 , and the amount of the gas claim 1 , having flowed in the adsorption chamber from the tank port claim 1 , passing through the upper portion of the first filter is made larger than that of the gas passing through the lower portion thereof.3. ...

EVAPORATED FUEL TREATMENT APPARATUS

In an evaporated fuel treatment apparatus, for achieving common use of a casing, having a simple structure, the evaporated fuel treatment apparatus comprising: a casing having one or more adsorption chambers filled with an adsorbent that adsorbs and desorbs evaporated fuel generated in a fuel tank or the like; a tank port; a purge port; and an atmosphere port, and the casing is configured by directly connecting a first member that constitutes one end of the casing, and is provided with at least the tank port and the purge port, a second member that constitutes the other end thereof, and one or more cylindrical members provided between the first member and the second member. 1. An evaporated fuel treatment apparatus comprising: a casing having at least one adsorption chamber filled with an adsorbent that adsorbs and desorbs evaporated fuel generated in a fuel tank or the like; a tank port; a purge port; and an atmosphere port , whereinsaid casing is configured by directly connecting a first member that constitutes one end of said casing and includes at least the tank port and the purge port, a second member that constitutes the other end thereof, and at least one cylindrical member provided between the first member and the second member.2. The evaporated fuel treatment apparatus according to claim 1 , wherein a rib is formed on an inner peripheral surface of the cylindrical member in a peripheral direction thereof.3. The evaporated fuel treatment apparatus according to claim 1 , whereina flow path through which the evaporated fuel flows is formed in said casing, anda partition wall that constitutes said flow path is integrally formed in said cylindrical member.4. The evaporated fuel treatment apparatus according to claim 1 , whereina flow path through which the evaporated fuel flows is formed in said casing, andan engagement portion is provided in said cylindrical member, and a partition wall that constitutes said flow path is provided to be engaged with said ...

EVAPORATED FUEL TREATMENT DEVICE

An evaporated fuel treatment device including a cylindrical casing body, a granular adsorbent filled in the casing body, an air permeable member stacked on the granular adsorbent, a retainer member stacked on the air permeable member, and a tJooth-shaped positioning retention mechanism disposed between an inner circumferential surface of the casing body and an outer circumferential surface of the retainer member. The tooth-shaped positioning retention mechanism allows the retainer member to hold the air permeable member in a compressively deformed state, enables positioning and retention of the retainer member in an optional position relative to the casing body in a pushing direction of the retainer member, and inhibits displacement of the retainer member in a removal direction of the retainer member. 1. An evaporated fuel treatment device comprising:a cylindrical casing body having one open end;a granular adsorbent filled in the casing body, the granular adsorbent serving to adsorb and desorb evaporated fuel,an air permeable member disposed on a side of the one open end of the casing body in a stacked relation to the granular adsorbent, the air permeable member being made of an elastic molding material,a retainer member disposed on the side of the one open end of the casing body in a stacked relation to the air permeable member, the retainer member being in the form of a grid or a porous plate,a cover member mounted to the one open end of the casing body to close the one open end of the casing body; anda tooth-shaped positioning retention mechanism disposed between an inner circumferential surface of the casing body and an outer circumferential surface of the retainer member,wherein the tooth-shaped positioning retention mechanism allows the retainer member to hold the air permeable member in a compressively deformed state and enables positioning and retention of the retainer member in an optional position relative to the casing body in a pushing direction in which ...

FUEL TANK SYSTEM

A fuel tank system capable of purging a canister without relying on the action of negative pressure from the engine, thereby giving excellent energy efficiency. Gases in the fuel tank move to a canister when filling up, and any fuel vapor is adsorbed in the canister. Air components are separated from the gases in the fuel tank using a gas separator and discharged and a negative pressure can be induced inside the fuel tank. This negative pressure acts on the canister and purges the canister. 1. A fuel tank system comprising:a fuel tank for holding fuel;a canister capable of adsorbing fuel vapor inside the fuel tank and releasing the fuel vapor;a gas separator that separates air components from gases in the fuel tank and discharges the separated air components externally to the fuel tank;an internal pressure detecting device for detecting internal pressure of the fuel tank; anda switching device for switching between a first state in which the internal pressure of the fuel tank is in a negative pressure state of a negative pressure of a first specific value or lower and it is possible to use the negative pressure to suck fuel vapor that has been adsorbed by the canister into the fuel tank, and a second state in which the internal pressure of the fuel tank is in a positive pressure state of a positive pressure of a second specific value or higher and it is possible to use the positive pressure to cause gas of a gas layer to pass through the gas separator and air components in the gas layer to be externally discharged from the gas separator.2. The fuel tank system of wherein the switching device comprises:a communication pipe with one end connected to the fuel tank, an intermediate section that branches at a branching section, and the other ends respectively connected to the canister and the gas separator;a discharge pipe for externally discharging air components from the gas separator;a three-way valve provided to the branching section of the communication pipe and ...

FUEL VAPOR PURGE DEVICE

A fuel vapor purge device includes a canister connected to an internal combustion engine and a fuel tank via a purge passage to adsorb and hold a part of fuel vapor, a switch valve connected to the canister and to an atmosphere, and a pump connected to the switch valve via a pump passage and to the atmosphere via an atmosphere passage. The pump is capable of depressurizing or pressurizing an interior of the fuel tank, and the switch valve switches connection of the canister between with the atmosphere and with the pump. The fuel vapor purge device further includes a seal valve provided in the pump passage to open or close the pump passage depending on a pressure in the atmosphere passage. 1. A fuel vapor purge device which purges fuel vapor generated in a fuel tank by introducing the fuel vapor into an internal combustion engine , the fuel vapor purge device comprising:a purge passage connecting the fuel tank and an intake passage through which intake air is introduced into the internal combustion engine;a first canister provided in the purge passage to adsorb and hold a part of the fuel vapor flowing in the purge passage;a purge valve provided in the purge passage near the intake passage to open or close the purge passage;a first pump passage having a first end connected to the first canister;a second pump passage having a first end capable of being connected to a second end of the first pump passage;a third pump passage having a first end capable of being connected to a second end of the second pump passage;a pump connected to a second end of the third pump passage, wherein the pump is capable of depressurizing or pressurizing an interior of the fuel tank through the third pump passage, the second pump passage, the first pump passage, the first canister and the purge passage;a first atmosphere passage having a first end connected to the pump, and a second end open to an atmosphere;a second atmosphere passage having a first end connected to the first atmosphere ...

Fuel system diagnostics

An emissions control system is provided that comprises a fuel tank, a hydrocarbon filter element, and a three-way valve coupled between the hydrocarbon filter element and the atmosphere. The three-way valve is comprised of three ports, a purge port, a reference port, and a sealed port, and enables identification of degradation of the emissions control system. The arrangement of the ports on the valve enables a simplified testing method that reduces background errors caused by transitioning between various operating positions.

Canister

A canister is provided with a plurality of adsorbent chambers filled with adsorbent, and the adsorbent chambers are connected together so as to form a U-turn-shaped passage. The canister has a communication chamber through which both end portions of adjacent two adsorbent chambers communicate with each other; a middle chamber formed at the end portion of one of the adjacent two adsorbent chambers, which is positioned at a downstream side of the communication chamber, and connected to the communication chamber through a communication hole; a baffle plate set in the middle chamber with the baffle plate facing to the communication hole so that an incoming air flow from the communication hole strikes against the baffle plate and diffuses in the middle chamber; and a tubular portion protruding in the communication chamber from an opening edge of the communication hole along a longitudinal direction of the one adsorbent chamber.

Evaporation fuel processing device

An evaporation fuel processing device is provide including: a passage; a tank port and a purge port on one end side of the passage; an atmospheric air port on the other end side of the passage; and adsorbent layers filled with adsorbent for evaporation fuel components, provided in the passage; a region provided on an atmospheric air port side of the passage, being constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, in which a volume of the adsorbent layer is smaller in the adsorbent layer closer to the atmospheric air port, a volume of the separating part is larger closer to the atmospheric air port, and the volume of the separating part located farthest on a tank port side is larger than that of the adsorbent layer located farthest on the atmospheric air port side.

EVAPORATION FUEL PROCESSING DEVICE

The present invention provides an evaporation fuel processing device including: a passage formed inside so as to allow a fluid to flow through the passage; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side of the passage; and adsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage, wherein a region which is constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on an atmospheric air port side of the passage. 1. An evaporation fuel processing device , comprising:a passage formed inside so as to allow a fluid to flow through the passage;a tank port and a purge port formed on one end side of the passage;an atmospheric air port formed on the other end side of the passage; andadsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage;wherein a region, which comprises three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on a side of an atmospheric air port of the passage.2. The evaporation fuel processing device according to claim 1 , wherein claim 1 , in the region claim 1 , a total of distances between both end surfaces of the adsorbent layers is set shorter than a total of separation distances between the adjacent adsorbent layers.3. The evaporation fuel processing device according to claim 1 , wherein claim 1 , in the region claim 1 , the separation distance between the adjacent adsorbent layers is set longer in the separating part closer to the atmospheric air port.4. The evaporation fuel processing ...

CANISTER ARRANGEMENT STRUCTURE OF STRADDLE TYPE VEHICLE

An engine supported on a main frame with an air cleaner disposed above a cylinder head. Air is supplied from an upper direction via an intake passage. A canister is supported above a crankcase and on the side surface of the main frame. A purge pipe connects between a front end portion of the canister and the intake passage. The purge pipe has a short length and includes a purge control valve in an intermediate portion and includes a first purge pipe for connecting the purge control valve with the canister, and a second purge pipe for connecting the purge control valve with the intake passage. Evaporated fuel from a fuel tank is supplied to the canister via a discharge pipe. A drain tube is connected at the rear end of the canister and at the lower position relative to the connecting portion of the first purge pipe. 1. A canister arrangement structure of a straddle vehicle having a body frame including a main frame extending rearwardly from a head pipe , comprising:an engine supported on a lower portion of said main frame, said engine including a crankcase;a cylinder extending substantially horizontally in a forward direction from the front portion of the crankcase and a cylinder head attached to the front portion of the cylinder;a fuel tank supported on an upper portion of said main frame;an intake passage for connecting between an air cleaner supported by said main frame and an intake port of said cylinder head;a canister for storing evaporated fuel within said fuel tank via a discharge pipe and for supplying said evaporated fuel to said intake passage via a purge pipe;said canister being disposed above said engine as well as behind said intake passage; anda pipe connecting portion wherein said purge pipe is connected and is disposed in a front portion of said canister.2. The canister arrangement structure of the straddle vehicle according to claim 1 , wherein said main frame is inclined obliquely downwardly in a rearward direction along a vehicle body center from ...

GRID AND CANISTER USING THE GRID

A grid that includes a plurality of holes perforated therein such that an aperture ratio of the grid increases from the center toward the periphery of the grid. The grid holds absorbents filled inside a filling chamber of a canister having an opening, and keeps the absorbents inside the filling chamber. 1. A grid comprising:a plurality of holes perforated therein such that an aperture ratio of the grid increases from a center toward a periphery of the grid,wherein the grid holds absorbents filled inside a filling chamber of a canister having an opening, and keeps the absorbents inside the filling chamber.2. The grid according to wherein the plurality of holes comprises:a plurality of small holes perforated around the center, anda plurality of large holes perforated along a peripheral edge outside an area where the plurality of small holes is perforated.3. The grid according to wherein the plurality of holes comprises:holes that are arranged radially from the center, wherein the closer the holes are to the center, the smaller the holes are.4. The grid according to claim 1 , wherein the aperture ratio at the center is zero.5. A canister that holds the absorbents inside the filling chamber by using the grid according to .6. The canister according to claim 5 , wherein the absorbents comprise granular activated carbon.7. The canister according to claim 5 , further comprising a spring configured to bias the grid within the canister.8. The canister according to claim 6 , being configured for receiving evaporated fuel from an internal combustion engine.9. The grid according to claim 1 , wherein the grid comprises a metal member in which the plurality of holes is perforated.10. The grid according to claim 9 , wherein the metal member comprises a disc shape.11. The grid according to claim 9 , wherein the metal member comprises a square shape.12. The grid according to claim 9 , wherein the plurality of holes is defined in the metal member by punching.13. The grid according to ...

Fuel Control Systems And Methods For Preventing Over Fueling

A fuel control system for an engine includes a closing module and a purge control module. The closing module commands closing of a purge valve in response an engine speed transitioning from greater than a predetermined speed to less than the predetermined speed while the purge valve is in an open state. The predetermined speed is less than a predetermined target speed of the engine and is greater than zero. The purge control module transitions the purge valve from the open state to a closed state in response to the command. 1. A fuel control system for an engine , comprising:a closing module that commands closing of a purge valve in response an engine speed transitioning from greater than a predetermined speed to less than the predetermined speed while the purge valve is in an open state,wherein the predetermined speed is less than a predetermined target speed of the engine and is greater than zero; anda purge control module that transitions the purge valve from the open state to a closed state in response to the command.2. The fuel control system of wherein the predetermined target speed is a predetermined idle engine speed.3. The fuel control system of wherein the predetermined speed is at least five percent less than the predetermined idle engine speed.4. The fuel control system of wherein the closing module commands the closing of the purge valve in response to the engine speed transitioning from greater than the predetermined speed to less than the predetermined speed while both (i) the purge valve is in an open state that the purge valve is in the open state and (ii) that an output of an exhaust gas oxygen sensor indicates that an air/fuel mixture supplied to the engine is fuel rich relative to a target air/fuel mixture.5. The fuel control system of further comprising a fuel control module that periodically toggles the target air/fuel mixture between fuel rich and fuel lean and that controls fueling of the engine based on the target air/fuel mixture.6. The ...

FUEL VAPOR PROCESSING APPARATUS

A fuel vapor processing apparatus may include a first adsorption chamber, a second adsorption chamber and a third adsorption chamber that are arranged in series with respect to a flow of gas. A ratio of a length to a diameter of the second adsorption chamber may be larger than a ratio of a length to a diameter of the first adsorption chamber. A filling ratio of an adsorbent within the second adsorption chamber may be smaller than a filling ratio of an adsorbent within the first adsorption chamber. 1. A fuel vapor processing apparatus , comprising:a main adsorption chamber communicating with a tank port and a purge port and containing a first adsorbent;an adsorption region disposed on a side of an atmospheric port with respect to the main adsorption chamber; the adsorption region includes a low filling-ratio adsorption chamber containing a second adsorbent, and an atmosphere-side adsorption chamber containing a third adsorbent, the atmosphere-side adsorption chamber communicating with the atmospheric port, and the low filling-ratio adsorption chamber being disposed between the atmosphere-side adsorption chamber and the main adsorption chamber;', 'a volumetric capacity of the adsorption region is smaller than a volumetric capacity of the main adsorption chamber;', 'a ratio of a length of the low filling-ratio adsorption chamber in a direction of flow of fuel vapor to a diameter of a circle having an area equivalent to a cross sectional area of the low filling-ratio adsorption chamber perpendicular to the direction of flow of the fuel vapor is larger than a ratio of a length of the main adsorption chamber in a direction of flow of the fuel vapor to a diameter of a circle having an area equivalent to a cross sectional area of the main adsorption chamber perpendicular to the direction of flow of the fuel vapor;', 'a filling ratio of the second adsorbent within the low filling-ratio adsorption chamber is smaller than a filling ratio of the first adsorbent within the main ...

Fuel vapor processing apparatus

A fuel vapor processing apparatus may include a first adsorption chamber, a second adsorption chamber and a third adsorption chamber that are connected in series with respect to a flow of gas. A ratio of a length to a diameter of the second adsorption chamber may be larger than that of the first adsorption chamber. A cross sectional area of each of the second and third adsorption chambers may be smaller than a cross sectional area of the first adsorption chamber.

ENGINE STARTING SYSTEM WITH PURGE PUMP

A starting system for an internal combustion engine that includes: a pump device in communication with a purging and priming circuit of a carburetor; a driven member coupled to the pump device; and a drive member rotatably carried by a recoil starter pulley of an engine. The drive member may positively drive the driven member in two directions, and the driving of the driven member may actuate the pump device. 1. A starting system for an internal combustion engine , comprising:a pump device in communication with a purging and priming circuit of a carburetor;a driven member coupled to the pump device; anda drive member rotatably carried by a recoil starter pulley of an engine, wherein the drive member positively drives the driven member in two directions, wherein driving the driven member actuates the pump device.2. The starting system of claim 1 , wherein the driven member has a first cam surface and a second cam surface and the drive member engages the first cam surface of the driven member to drive the driven member in a first direction and the drive member engages the second cam surface of the driven member to drive the driven member in a second direction.3. The starting system of claim 2 , wherein at least a portion of the drive member is defined by a peg extending from the pulley claim 2 , wherein the peg rotates with the pulley and engages the first and second cam surfaces of the driven member as the peg rotatably passes the driven member.4. The starting system of claim 1 , wherein the drive member has a first cam surface and a second cam surface and during rotation of the drive member claim 1 , the first cam surface engages the driven member to drive the driven member in a first direction and the second cam surface engages the driven member to drive the driven member in a second direction.5. The starting system of claim 4 , wherein the drive member is defined by one of a flange or a rail having one or more radial deviations for positive mechanical engagement ...

Purge system

A purge system of a vehicle for purging C—H-gas of a tank system to an induction line of a combustion engine of the vehicle. The purge system includes a purge unit, a control unit for operating the purge unit and gas connection lines, wherein a first line end of the gas connection lines is configured for connecting the purge unit with the tank system and a second line end of the gas connection lines is configured for connecting the purge unit with the induction line. The purge system also includes a C—H-sensor for measuring a C—H-gas concentration of a fluid volume flow that flows from the first line end towards the second line end. A vehicle and a method for operating a combustion engine system of a vehicle with a purge system is also provided.

EVAPORATED FUEL TREATMENT APPARATUS

An evaporated fuel treatment apparatus includes a passage circulating fluid being formed therein, a tank port and a purge port being formed at one end side of the passage, and an atmosphere port being formed at another end side of the passage. At least four adsorbent layers in which adsorbent adsorbing fuel components is filled are provided in the passage. The evaporated fuel treatment apparatus has a main adsorbent layer and a region provided on an atmosphere port side of the main adsorbent layer. At least three adsorbent layers that are different from the main adsorbent layer, and separating portions that separate the adsorbent layers which are adjacent to each other are provided in the region. The volume of at least one separating portion in the region is made larger than a total of the volumes of adsorbent layers that sandwich the separating portion therebetween. 1. An evaporated fuel treatment apparatus in which a passage circulating fluid inside is formed , a tank port and a purge port are formed at one end of the passage , an atmosphere port is formed at the other end of the passage , and at least four adsorbent layers in which adsorbent adsorbing fuel components is filled are provided in the passage ,the evaporated fuel treatment apparatus characterized of having a main adsorbent layer and a region that is provided on an atmosphere port side of the main adsorbent layer,wherein:at least three adsorbent layers that are different from the main adsorbent layer, and separating portions separating adjacent ones in the adsorbent layers are provided in the region; anda volume of at least one separating portion in the region is made larger than a total of volumes of the adsorbent layers that sandwich the separating portion therebetween.2. The evaporated fuel treatment apparatus according to claim 1 , wherein claim 1 , with respect to two adsorbent layers that sandwich therebetween a separating portion that has a volume that is made larger than a total of the volumes ...

Evap system with valve to improve canister purging

Systems and methods are provided for an evaporative emissions control system. In one example, a system for an engine may comprise a fuel vapor canister, a mixing valve positioned in a fresh air line upstream of the vapor canister, and an actuator physically coupled to the mixing valve for adjusting a position of the mixing valve to increase turbulence in air entering the vapor canister. The position of the mixing valve may be adjusted to increase an amount of turbulence in air entering the fuel vapor canister.

FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

A fuel supply system for use with an internal combustion engine has a check valve and a purge valve disposed in a purge passage that extends from a canister to connect with an intake passage of the internal combustion engine. A controller regulates the purge valve open with a first opening degree or a first duty ratio during a purge operation. The controller may also regulate the purge valve to open with a second opening degree larger than the first opening degree or a second duty ratio larger than the first duty ratio a predetermined time after initiating the purge operation. 1. A fuel vapor supply system configured to supply fuel vapor to an internal combustion engine having an intake passage and a fuel injector , the fuel vapor supply system comprising:a canister configured to store the fuel vapor;a purge passage extending from the canister to connect to the intake passage of the internal combustion engine wherein the purge passage allows the fuel vapor stored in the canister to flow to the internal combustion engine through the purge passage;a purge valve disposed in the purge passage wherein the purge valve is configured to regulate a flow rate of the fuel vapor flowing from the canister to the intake passage;a check valve disposed in the purge passage between the purge valve and the intake passage wherein the check valve is configured to permit the flow of the fuel vapor from the canister to the intake passage and further wherein the check valve is configured to prevent the flow of air from the intake passage to the canister;wherein the purge passage has an intermediate purge passage that extends from the purge valve to the check valve; and control a degree of opening of the purge valve or control a duty ratio wherein the duty ratio is defined as a ratio of a valve opening time to a predetermined frequency period and further wherein control of the degree of opening of the purge valve or control of the duty ratio regulates the flow rate of the fuel vapor ...

FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

A fuel supply system adapted to supply fuel to an internal combustion engine has both a check valve and a purge valve disposed in a purge passage that extends from a canister to connect with an intake passage of the internal combustion engine. A controller estimates a pressure within an intermediate purge passage of the purge passage located between the check valve and the purge valve without relying on the use of a separate pressure detection device to provide information regarding the same. 1. A fuel vapor supply system configured to supply fuel vapor to an internal combustion engine having an intake passage , the fuel vapor supply system comprising:a canister configured to store the fuel vapor;a purge passage extending from the canister to connect to the intake passage of the internal combustion engine wherein the purge passage allows the fuel vapor stored in the canister to flow to the internal combustion engine through the purge passage;a purge valve disposed in the purge passage wherein the purge valve is configured to regulate a flow rate of the fuel vapor flowing from the canister to the intake passage is controlled;a check valve disposed in the purge passage between the purge valve and the intake passage wherein the check valve is configured to permit the flow of the fuel vapor from the canister to the intake passage and further wherein the check valve is configured to prevent the flow of air from the intake passage to the canister;wherein the purge passage has an intermediate purge passage that extends from the purge valve to the check valve; andwherein the check valve is configured to open when an intermediate purge passage pressure within the intermediate purge passage exceeds an intake passage pressure within the intake passage and the check valve is configured to close when the intermediate purge passage pressure does not exceed the intake passage pressure;a pressure detection device configured to detect the intake passage pressure; control a degree of ...

FUEL EVAPORATIVE GAS TREATMENT DEVICE FOR FUEL TANK

A fuel evaporative gas treatment device for a fuel tank is used in a motorcycle including a combustion engine with a supercharger. The fuel evaporative gas treatment device includes a canister which contains an adsorbent for adsorbing fuel evaporative gas from the fuel tank, a communication passage which communicates between an air intake passage for the combustion engine and the canister, and a check valve provided on the communication passage. The check valve blocks fluid flow from the air intake passage to the canister and permits fluid flow from the canister to the air intake passage. 1. A fuel evaporative gas treatment device for a fuel tank , the fuel evaporative gas treatment device being used in a vehicle including a combustion engine with a supercharger , the fuel evaporative gas treatment device comprising:a canister containing an adsorbent which adsorbs fuel evaporative gas from the fuel tank;a communication passage configured to communicate between an air intake passage for the combustion engine and the canister; anda check valve provided on the communication passage, the check valve being configured to block fluid flow from the air intake passage to the canister and permit fluid flow from the canister to the air intake passage.2. The fuel evaporative gas treatment device as claimed in claim 1 , wherein an air intake side communication hole communicating with the air intake passage;', 'a canister side communication hole communicating with the canister;', 'a partition wall separating between the air intake side and the canister side communication holes, the partition wall being provided with a valve port configured to communicate between the air intake side and the canister side communication holes; and', 'a valve body configured to open and close the valve port, and, 'the check valve includesthe valve body is movable between a seated position at which the valve port is closed and a non-seated position at which the valve port is opened, and moves from the ...

Fuel Vapor Processing Apparatus

A fuel vapor processing apparatus includes a casing, an adsorbent, and a mixer. The casing includes an atmospheric port and a purge port. In addition, the casing forms an atmospheric port-side adsorption chamber, an agitation chamber, and a purge port-side adsorption chamber therein. The atmospheric port-side adsorption chamber, the agitation chamber, and the purge port-side adsorption chamber are continuously arranged in a gas flow direction from the atmospheric port through the casing to the purge port. The adsorbent fills the atmospheric port-side adsorption chamber and the purge port-side adsorption chamber. The adsorbent is configured to adsorb and desorb fuel vapor. The mixer is disposed in the agitation chamber and includes a spiral flow forming part configured to spirally guide gas flowing through the agitation chamber. 1. A fuel vapor processing apparatus , comprising:a casing including an atmospheric port and a purge port, wherein the casing forms an atmospheric port-side adsorption chamber, an agitation chamber, and a purge port-side adsorption chamber therein, wherein the atmospheric port-side adsorption chamber, the agitation chamber, and the purge port-side adsorption chamber are continuously arranged in a gas flow direction from the atmospheric port through the casing to the purge port;an adsorbent filling the atmospheric port-side adsorption chamber and the purge port-side adsorption chamber, wherein the adsorbent is configured to adsorb and desorb fuel vapor; anda mixer disposed in the agitation chamber and including a spiral flow forming part, wherein the spiral flow forming part is configured to spirally guide gas flowing through the agitation chamber.2. The fuel vapor processing apparatus according to claim 1 ,wherein the spiral flow forming part is disposed at an upstream end or a downstream end of the agitation chamber in the gas flow direction.3. The fuel vapor processing apparatus according to claim 1 ,wherein the spiral flow forming part ...

ABNORMALITY SENSING DEVICE FOR EVAPORATION FUEL PURGE SYSTEM

An abnormality sensing device for an evaporation fuel purge system is equipped with a purge passage that connects a canister to an intake passage of an internal combustion engine, a purge pump, a purge control valve, and a valve component that closes and opens the purge passage at a target passage including at least a first purge passage defined between the purge control valve and the intake passage. An abnormality determining portion detects a physical quantity relevant to a pressure change in the target passage in a determination possible state where the purge control valve allows the evaporation fuel to flow through the first purge passage and where the valve component prohibits the evaporation fuel from being supplied to the intake passage.

SYSTEMS AND METHODS FOR INFERRING BAROMETRIC PRESSURE

Methods and systems are provided for determining barometric pressure. In one example, an onboard vacuum pump is utilized to draw a vacuum at a constant flow rate across a reference orifice, and the resulting vacuum level is converted to a barometric pressure. In this way, other sensors for determining barometric pressure in a vehicle may be rationalized without the use of engine operation, and in an example where the other sensors for determining barometric pressure are not functioning as desired, barometric pressure as inferred from the onboard pump may be utilized to adjust engine operation. 1. A method comprising:delivering fuel from a fuel system to an engine propelling a vehicle;storing fuel vapors from the fuel system in an evaporative emissions control system;determining an estimate of barometric pressure as a function of an efficiency of a vacuum pump configured to evacuate or pressurize the fuel system and evaporative emissions control system; andadjusting a vehicle operating parameter responsive to the estimate.2. The method of claim 1 , further comprising:turning on the vacuum pump and drawing a vacuum across a reference orifice of fixed diameter.3. The method of claim 2 , wherein drawing the vacuum across the reference orifice of fixed diameter includes configuring a changeover valve coupled to the vacuum pump in a first position; and whereinpressurizing or evacuating the vehicle fuel system and evaporative emissions control system includes configuring the changeover valve in a second position.4. The method of claim 2 , wherein the efficiency of the vacuum pump is a function of a vacuum level achieved by the vacuum pump when drawing the vacuum across the reference orifice of fixed diameter.5. The method of claim 1 , wherein efficiency of the vacuum pump decreases as barometric pressure decreases; and whereinthe efficiency of the vacuum pump increases as barometric pressure increases.6. The method of claim 1 , further comprising:correlating barometric ...

FUEL SYSTEM HAVING VENT POINT VALVE

A fuel tank system includes a fuel tank, a liquid trap and a tank venting assembly. The fuel tank defines a first vapor space and a second vapor space. The tank venting assembly includes a vent valve, a first vent line, a second vent line and a third vent line. The vent valve can have a movable member that is configured to move between a first open position wherein a front vent point is open and a second closed position wherein the front vent point is closed. The first vent line can be fluidly connected between the liquid trap and the vent valve. The second vent line can be fluidly connected between the vent valve and an auxiliary vent point. The third vent line can connect to an upper vent point. In a closed position, the auxiliary vent point and the upper vent point remain open and vented. 1. A fuel tank system comprising:a fuel tank configured as a reservoir for holding fuel to be supplied to an internal combustion engine, the fuel tank defining a first vapor space and a second vapor space at an area distinct from the first vapor space;a liquid trap; a vent valve having a movable member that is configured to move between a first open position wherein a front vent point is open and a second closed position wherein the front vent point is closed;', 'a first vent line fluidly connected between the liquid trap and the vent valve;', 'a second vent line fluidly connected between the vent valve and an auxiliary vent point at the first vapor space; and', 'a third vent line fluidly connected between the liquid trap and an upper vent point at the second vapor space; and, 'a tank venting assembly comprisingwherein the vent valve is configured to move to the closed position upon a fuel level reaching a predetermined level, wherein in the closed position, the auxiliary vent point and the upper vent point remain open and vented to the liquid trap.2. The fuel tank system of wherein the fuel tank further defines a third vapor space at the vent valve claim 1 , the third vapor ...

Canister

A canister includes a main casing, a first port formed in a wall of the main casing, and a first adsorbent section within the main casing. The first adsorbent section and the wall of the main casing define a space section therebetween. The first adsorbent section includes a first adsorbent and a first retainer holding the first adsorbent. The canister also includes a first elastic element disposed in the space section. The first elastic element urges the first retainer to elastically hold the first adsorbent. In addition, the canister includes a subcasing integral to the wall of the main casing. The subcasing is positioned within the space section. Further, the canister includes a second adsorbent section in communication with the first port. The second adsorbent section includes a second adsorbent disposed within the subcasing. Still further, the canister includes a second retainer holding the second adsorbent. 1. A canister comprising:a main casing;a first port formed in a wall of the main casing; a first adsorbent; and', 'a first retainer holding the first adsorbent;, 'a first adsorbent section within the main casing, wherein the first adsorbent section and the wall of the main casing defining a space section therebetween, and wherein the first adsorbent section comprisesa first elastic element disposed in the space section, wherein the first elastic element biases the first retainer to elastically hold the first adsorbent of the first adsorbent section,a subcasing integral with the wall of the main casing, wherein the subcasing is positioned within the space section; and a second adsorbent disposed within the subcasing; and', 'a second retainer holding the second adsorbent., 'a second adsorbent section in fluid communication with the first port, wherein the second adsorbent section comprises2. The canister according to claim 1 , wherein the main casing comprises:a main casing body having an open top and a bottom; anda closure closing the open top opening of the ...

FUEL VAPOR LEAKAGE DETECTION METHOD

A fuel vapor leakage detection device performs a fuel vapor leakage detection method to detect a clogging of passages in an evaporated fuel processing system by (i) switching a switching valve after measuring a first reference pressure, (ii) determining whether a detected pressure equals atmospheric pressure after opening a purge valve, (iii) recording the detected pressure after closing the purge valve, and (iv) switching the switching valve to depressurize an atmospheric system and to determine whether a current detection value of the pressure sensor is the same as the first reference pressure. Then, a second reference pressure is measured for comparison with the first reference pressure, to determine whether the evaporation system is clogged. In such manner, leakage and the clogging of the passages in an evaporated fuel processing system may be detected. 1. A fuel vapor leakage detection method for a fuel vapor leakage detection device that includesa canister connection passage connected to a canister that absorbs a fuel vapor in a fuel tank,an air passage for allowing fluid communication between the canister connection passage and atmosphere,a pressure detection passage for allowing fluid communication with the canister connection passage,a switching valve selectively switching fluid communication of the canister connection passage with one of the pressure detection passage or the air passage,a bypass passage for bypassing the switching valve that provides fluid communication between the canister connection passage and a pressure detection passage,a pressure-depressure unit (i) pressurizing or depressurizing the fuel tank and the canister when the switching valve establishes fluid communication between the canister connection passage and the pressure detection passage and (ii) pressurizing or depressurizing the air passage when the switching valve establishes fluid communication between the canister connection passage and the air passage,a throttle positioned ...

DEVICE AND METHOD FOR DIAGNOSING EVAPORATED FUEL PROCESSING DEVICE

An evaporated fuel processing apparatus includes a blocking valve configured to selectively allow and shut off communication between a canister and a fuel tank, and adsorbs evaporated fuel by the canister by opening the blocking valve during fuel filling, wherein the evaporated fuel occurs in the fuel tank, and performs a purge operation of introducing purge gas into an intake air line of an internal combustion engine with the blocking valve closed while the internal combustion engine is operating, wherein the purge gas contains a fuel component released from the canister. A diagnostic apparatus is configured to diagnose whether or not the blocking valve is abnormal, based on sensing of evaporated fuel flowing through the blocking valve while the purge operation is being performed. 1. A diagnostic apparatus for an evaporated fuel processing apparatus , wherein the evaporated fuel processing apparatus includes a blocking valve configured to selectively allow and shut off communication between a canister and a fuel tank , and adsorbs evaporated fuel by the canister by opening the blocking valve during fuel filling , wherein the evaporated fuel occurs in the fuel tank , and performs a purge operation of introducing purge gas into an intake air line of an internal combustion engine with the blocking valve closed while the internal combustion engine is operating , wherein the purge gas contains a fuel component released from the canister ,wherein the diagnostic apparatus is configured to diagnose whether or not the blocking valve is abnormal, based on sensing of evaporated fuel flowing through the blocking valve while the purge operation is being performed.2. The diagnostic apparatus as claimed in claim 1 , wherein:the canister includes a first end and a second end in a flow direction, wherein a charge port and a purge port is arranged at the first end, and a drain port is disposed at the second end;the charge port is connected to the fuel tank via the blocking valve; ...

Vaporized-fuel treating apparatus

A vaporized-fuel treating apparatus includes a pump part for controlling a flow of purge gas and a heating part for controlling driving of the pump part and for generating heat. At least a part of the heating part is placed to be exposed in an atmosphere passage. The pump part is either placed in the purge passage or arranged connecting to the purge passage.

CANISTER DESIGN FOR EVAPORATIVE EMISSION CONTROL

Methods and systems are provided for purging a fuel vapor canister into an engine intake. A method comprises flowing fuel vapors from a fuel tank through a full length of the fuel vapor canister from a first input to a first output on a first opposite side from the first input. The adsorbed fuel vapors may be purged from the fuel vapor canister through a full width in the fuel vapor canister from a second input to a second output on a second opposite side from the second input. 1. A method , comprising:flowing fuel vapors from a fuel tank through a full length of a fuel vapor canister from a first input to a first output on a first opposite side from the first input; andpurging the fuel vapors from the fuel vapor canister through a full width in the fuel vapor canister from a second input to a second output on a second opposite side from the second input.2. The method of claim 1 , wherein the first input and the first output are positioned directly across from each other claim 1 , the first output being arranged on the first opposite side claim 1 , and wherein the first input and the first output include the full length therebetween.3. The method of claim 1 , wherein the second input and the second output are arranged directly across from each other claim 1 , the second output being positioned on the second opposite side and wherein the second input and the second output include the full width therebetween.4. The method of claim 1 , wherein the purging of the fuel vapors occurs in a substantially perpendicular direction relative to the flowing of fuel vapors from the fuel tank through the full length of the fuel vapor canister.5. The method of claim 1 , wherein the full width of the fuel vapor canister is shorter than the full length of the fuel vapor canister.6. The method of claim 1 , wherein purging the fuel vapors includes flowing air simultaneously through a plurality of check valves into an adsorptive material arranged within the fuel vapor canister claim 1 , ...

METHOD AND SYSTEM FOR SENSOR RATIONALITY CHECK

Methods and systems are provided for performing rationality check of a hydrocarbon sensor in an evaporative emission control system. In one example, a method may include sensing fuel vapors vented from a fuel vapor canister to atmosphere via the sensor, and performing sensor rationality check by flowing desorbed hydrocarbons from the fuel vapor canister to an engine via the sensor during purging of the fuel vapor canister. 1. A method for an engine comprising:sensing fuel vapor vented from a fuel vapor canister to atmosphere via a sensor; andduring purging of the fuel vapor canister,actuating valves to flow desorbed hydrocarbons from the fuel vapor canister to the engine,sensing desorbed hydrocarbons with the sensor positioned in the flow path of the desorbed hydrocarbons, anddetermining sensor degradation based on the sensed desorbed hydrocarbons.2. The method of claim 1 , wherein sensor degradation is determined if the sensed desorbed hydrocarbons are lower than a non-zero threshold.3. The method of claim 1 , further comprising flowing desorbed hydrocarbons to the engine bypassing the sensor during purging of the fuel vapor canister.4. The method of claim 3 , wherein the sensor is bypassed after determining sensor degradation.5. The method of claim 1 , wherein the valves are actuated by activating two valves claim 1 , and each valve in direct fluid communication with the fuel vapor canister.6. The method of claim 5 , wherein the valves are two three way valves.7. The method of claim 1 , wherein the purging of the fuel vapor canister is performed in response to an estimated load of the fuel vapor canister higher than a threshold.8. The method of claim 1 , wherein the purging of the fuel vapor canister is performed in response to an engine start after refueling.9. A method for an engine claim 1 , comprising:in a first condition, flowing air to a vent port of the fuel vapor canister, and then flowing the desorbed hydrocarbons from a purge port of the fuel vapor ...

DEVICE HAVING AN ACTIVATED CARBON CANISTER AND MOTOR VEHICLE HAVING SUCH A DEVICE

A device having activated carbon canisters. A fuel tank used to supply fuel is vented into the activated carbon canisters that have, as activated carbon filters, carbon granules having large surfaces for temporarily adsorbing the hydrocarbon gases contained in the fuel tank emissions. The regeneration occurs cyclically by backflushing where fresh air is sucked in through an outlet and conducted through the activated carbon canisters to lead the hydrocarbon gases back into the region of the combustion apparatus. The device has structurally identical activated carbon canisters arranged in the same plane and connected in series by connecting lines, whereby an outlet opening of a first activated carbon canister is connected to an inlet opening of a further activated carbon canister. The outlet opening of the activated carbon canister is arranged above the inlet opening with respect to gravity. 1. A device is assigned to a fuel tank of a motor vehicle , the device comprising:a plurality of activated carbon canisters, each enclosing an activated carbon filter; andconnecting lines connected to the plurality of activated carbon canisters so that an outlet opening of a first activated carbon canister is, in each case, connected to an inlet opening of a further activated carbon canister,wherein the respective outlet opening is arranged below the inlet opening in the direction of the force of gravity.2. The device of claim 1 , wherein at least one connecting line the connecting lines has a collecting point arranged in a region of the connecting line below the inlet opening of one of the plurality of activated carbon canisters.3. The device of claim 2 , wherein the collecting point has a pipe bend.4. The device of claim 1 , wherein the plurality of activated carbon canisters have substantially corresponding volumes.5. The device of claim 1 , wherein the outlet openings and/or the inlet openings of the plurality of activated carbon canisters are claim 1 , in each case claim 1 , ...

FILTER ARRANGEMENT FOR A TANK VENTILATION SYSTEM OF A FUEL TANK

A tank ventilation system of a fuel tank () has at least one housing () with a tank-side fuel vapor inlet opening (), an engine-side fuel vapor outlet opening () and an atmosphere opening (). The housing () has at least one first adsorption region () and a second adsorption region () upstream of the fuel vapor outlet opening (). The second adsorption region () has a substantially lower absorption capacity than the first adsorption region (), which is placed in a direction of flow toward the atmosphere opening (). 1. A filter arrangement for a tank ventilation system of a fuel tank , comprising at least one housing with at least a tank-side fuel vapor inlet opening , an engine-side fuel vapor outlet opening and an atmosphere opening , the filter arrangement having at least one first adsorption region and at least a second adsorption region upstream of the fuel vapor outlet opening , said second adsorption region having a substantially lower absorption capacity than the first adsorption region which is placed in a direction of flow toward the atmosphere opening.2. The filter arrangement of claim 1 , wherein the second adsorption region takes up between 5% and 15% of an entire volume of the housing.3. The filter arrangement of claim 2 , wherein the second adsorption region also is upstream of the fuel vapor inlet opening claim 2 , wherein the volume/area ratio assigned to the fuel vapor outlet opening is greater than the volume/area ratio assigned to the fuel vapor inlet opening.4. The filter arrangement of claim 3 , wherein the volume/area ratio assigned to the fuel vapor outlet opening is approximately twice the volume/area ratio assigned to the fuel vapor inlet opening.5. The filter arrangement of claim 1 , wherein activated carbon is the adsorbent for all of the adsorption regions claim 1 , and wherein the adsorbent of the second adsorption region has a substantially smaller specific working capacity than the adsorbent of the first adsorption region.6. The filter ...

INTERNAL COMBUSTION ENGINE WITH A VENTURI NOZZLE DISPOSED IN A FLUID-CARRYING COMPONENT IN FLUID CONNECTION WITH A TANK VENTILATION LINE

The invention relates to an internal combustion engine having a fuel tank (), a tank ventilation line () and a Venturi nozzle () disposed in a fluid-carrying component (), wherein the Venturi nozzle () has an inflow channel (), an opening point () adjoining downstream of the inflow channel () with a fluid connection to the tank ventilation line (), and an outflow channel () adjoining downstream of the opening point (). In this case, an outflow section () of the Venturi nozzle downstream of the opening point () is surrounded by the component () in such a manner that a detection space () is formed around the outflow section (), wherein the detection space () has at least one inlet opening () via which the detection space () can be pressurized and wherein at least one pressure sensor () for monitoring the pressure in the detection space () is provided. 1. An internal combustion engine comprising:a tank ventilation line;a Venturi nozzle disposed in a fluid-carrying component, the Venturi nozzle comprising an inflow channel, an opening point adjoining downstream of the inflow channel, which is in fluid connection with the tank ventilation line, and an outflow channel adjoining downstream of the opening point; andan outflow section of the Venturi nozzle downstream of the opening point being surrounded by the fluid-carrying component such that a detection space is formed around the outflow section,wherein the detection space has at least one inlet opening via which the detection space is pressurized, andwherein at least one pressure sensor monitors a pressure in the detection chamber.2. The internal combustion engine according to claim 1 , wherein the inflow channel and/or a port to the tank ventilation line are at least partially surrounded by the fluid-carrying component.3. The internal combustion engine according to claim 1 , wherein the fluid-carrying component is an intake hood or an exhaust gas turbocharger.4. The internal combustion engine according to claim 1 , ...

Evaporated Fuel Processing Device

An evaporated fuel processing device includes a casing having a passage through which gasses flow. The casing includes a pair of adsorbing chambers arranged in series relative to a flow direction of the gasses in the passage. The casing also includes a diffusion chamber positioned between the pair of adsorbing chambers. A first diffusing element and a second diffusing element are disposed in the diffusion chamber. The first diffusing element is a frustum-shaped member having a large-diameter opening portion opening into one of the pair adsorbing chambers and a small-diameter opening portion opening into the diffusion chamber. The second diffusing element is a frustum-shaped member having a large-diameter opening portion opening into the other of the pair of adsorbing chambers and a small-diameter opening portion opening into the diffusion chamber. 1. An evaporated fuel processing device , comprising:a casing including a passage configured to flow gasses therethrough, a tank port in fluid communication with a first end of the passage, a purge port in fluid communication with the first end of the passage, an atmosphere port in fluid communication with a second end of the passage, a pair of adsorbing chambers filled with adsorbing materials configured to adsorb evaporated fuel and arranged in series relative to a flow direction of gasses through the passage, and a diffusion chamber positioned between the pair of adsorbing chambers, wherein the diffusion chamber is not filled with any adsorbing materials;a first diffusing element and a second diffusing element disposed in the diffusion chamber, wherein the first diffusing element is a frustum-shaped member having a large-diameter opening portion opening into one of the pair of adsorbing chambers and a small-diameter opening portion opening into the diffusion chamber, and wherein the second diffusing element is a frustum-shaped member having a large-diameter opening portion opening into the other of the pair of adsorbing ...

METHOD FOR ASCERTAINING THE CHARGING OF A STORE FOR HYDROCARBONS

A method for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle is characterized in that the charging of the store is determined from a variable characterizing the fuel outgassing with the aid of a model which maps the vapor pressure curve of the fuel. 1. A method for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle , comprising:determining the charging of the store from a variable characterizing fuel outgassing with the aid of a model which maps a vapor pressure curve of the fuel.2. The method as recited in claim 1 , wherein at least one of: a variable characterizing a fuel temperature claim 1 , and a variable characterizing a change in the fuel temperature over time claim 1 , is determined claim 1 , and is taken into account in ascertaining the variable characterizing the fuel outgassing.3. The method as recited in claim 2 , wherein at least one of: the variable characterizing the fuel temperature claim 2 , and the variable characterizing the change in the fuel temperature over time claim 2 , is determined from at least one of a measured ambient temperature and a temperature model.4. The method as recited in claim 1 , wherein an ambient pressure is ascertained and used for correcting the model which maps the vapor pressure curve of the fuel.5. The method as recited in claim 1 , wherein an acceleration of the fuel tank is ascertained and used for correcting the model which maps the vapor pressure curve of the fuel.6. The method as recited in claim 1 , wherein at least one of: a filling level of the fuel tank claim 1 , and changes in the filling level of the fuel take claim 1 , is ascertained claim 1 , and the variable characterizing the fuel outgassing is ascertained as a function of the at least one of the filling level and the changes in the filling level.7. A machine-readable memory medium on which is stored a computer program for ascertaining the charging of a store for ...

FUEL EVAPORATIVE EMISSION PROCESSING SYSTEM

A fuel evaporative emission processing system suitable for a hybrid vehicle includes a fuel vapor passage, a shut-off valve, a purge passage, a first purge control valve, and a second purge control valve. The shut-off valve selectively opens and closes the fuel vapor passage communicating between a fuel tank and a canister. The first purge control valve opens and closes the purge passage communicating between the canister and an intake air passage of an internal combustion engine. The second purge control valve selectively opens or closes the tank opening passage communicating between the purge passage on an upstream side of the first purge control valve and the fuel tank. When purging the canister, by opening the second purge control valve, the evaporative fuel inside the fuel tank is directly processed by the internal combustion engine, so that increase in the amount of adsorption in the canister can be suppressed. 1. A fuel evaporative emission processing system for an internal combustion engine , comprising:a fuel vapor passage communicating a fuel tank and a canister;a shut-off valve interposed in the fuel vapor passage and configured to selectively open and close the fuel vapor passage,a purge passage communicating the canister and an intake passage of the internal combustion engine;a first purge control valve interposed in the purge passage and configured to selectively open and close the purge passage;a tank opening passage communicating the purge passage in an upstream side position of the first purge control valve and the fuel tank;a second purge control valve interposed in the tank opening passage and configured to selectively open and close the tank opening passage; anda purge control mechanism configured to purge the canister by controlling the first purge control valve during operation of the internal combustion engine, wherein the purge control mechanism is configured to process the evaporative fuel emission in the fuel tank by the internal combustion ...

FUEL EVAPORATIVE EMISSION PROCESSING SYSTEM

A fuel evaporative emission processing system suitable for a hybrid vehicle includes a shut-off valve, a first purge control valve and a second purge control valve. The shut-off valve is selectively opens and closes a fuel vapor passage between a fuel tank and a canister. The first purge control valve selectively opens and closes a purge passage between the canister and the intake passage of an internal combustion engine. The second purge control valve selectively opens and closes a tank opening passage between the canister and the fuel tank. When releasing a pressure for refueling, the second purge control valve with a small diameter opens prior to opening of the shut-off valve so that blow-by of gas associated with opening of the shutoff valve is prevented. 1. A fuel evaporative emission processing system for an internal combustion engine , comprising:a fuel vapor passage communicating a fuel tank and a charge port of a canister;a shut-off valve interposed in the fuel vapor passage and configured to selectively open and close the fuel vapor passage, the shut-off valve being a solenoid valve that is configured to open during refueling;a tank opening passage communicating the fuel tank and the canister;a second control valve interposed in the tank opening passage and configured to open prior to opening of the shut-off valve when releasing a pressure for refueling;a tank pressure sensor configured to detect a pressure in the fuel tank; anda diagnosis mechanism configured to diagnose the second control valve based on a pressure change in the fuel tank developed after opening of the second control valve from a state in which the pressure in the fuel tank is positive with the shut-off valve and the second control valve closed.2. The fuel evaporative emission processing system according to claim 1 , whereinthe second purge control valve is formed with a passage area smaller than a passage area of the shut-off valve.3. The fuel evaporative emission processing system ...

FUEL TANK STRUCTURE

A fuel tank structure comprising a fuel tank; a canister; a first pipe that joins together a holding portion of the fuel tank and the canister; a first shut-off valve provided at the first pipe; a filler pipe; a second pipe that joins together the filler pipe and the canister; a second shut-off valve provided at the second pipe; a pressure sensor that detects the pressure inside the holding portion; a fuel pump that feeds the fuel to an engine; and a control unit. The control unit opens the first shut-off valve during refueling such that evaporative fuel is permitted to move from the holding portion to the canister, and closes the first shut-off valve after refueling. The control unit opens the second shut-off valve when the pressure inside the holding portion detected by the pressure sensor drops below a predetermined pressure which is lower than the atmospheric pressure. 1. A fuel tank structure comprising:a fuel tank that is mounted in a vehicle and that is provided with a holding portion that holds fuel;a canister that communicates with the outside atmosphere;a first pipe that joins together the holding portion and the canister;a first shut-off valve that opens and closes the first pipe:a filler pipe that is connected to the holding portion, and that is provided with a refueling aperture into which a nozzle of a fueling gun is inserted and that remains closed other than during refueling;a second pipe that joins together the filler pipe and the canister;a second shut-off valve that opens and closes the second pipe:a pressure sensor that detects the pressure inside the holding portion;a fuel pump that feeds the fuel inside the holding portion to an engine; anda control unit that opens the first shut-off valve during refueling such that evaporative fuel is permitted to move from the holding portion to the canister, and that closes the first shut-off valve after refueling, and that also opens the second shut-off valve when the pressure inside the holding portion ...

EVAPORATIVE FUEL VAPOR EMISSION CONTROL SYSTEMS

An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of between 2 grams and 6 grams. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr butane loading step. 1. An evaporative emission control canister system for a hybrid vehicle , including one or more canisters and comprising:a fuel-side adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane; andat least one vent-side subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, a butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of ≦6 grams,wherein the fuel-side adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and the at least one subsequent adsorbent volume are located within a single canister, or in separate canisters that are connected to permit sequential contact by fuel vapor.2. The canister system of claim 1 , wherein the canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg as determined by the 2012 California Bleed Emissions Test Procedure (BETP).3. The canister system of claim 2 , ...

EVAPORATED FUEL TREATMENT DEVICE

The objective of the present invention is to provide an evaporated fuel treatment device capable of performing a function diagnosis of a sealing valve with high accuracy even if an internal combustion engine is in operation. The evaporated fuel treatment device includes a sealing valve that blocks a fuel tank from the atmosphere, a canister, a canister internal pressure detection unit, a control part that performs an instruction for opening or closing the sealing valve and controls a purge, and a diagnostic part that performs a function diagnosis of an evaporated fuel sealing system including the fuel tank, the canister, and the sealing valve. The diagnostic part performs the function diagnosis of the sealing valve based on whether or not a canister internal pressure detected by the canister internal pressure sensor varies beyond a predetermined range. 1. An evaporated fuel treatment device , comprising:a sealing valve that is provided on a communication passage between an atmosphere and a fuel tank mounted on a vehicle having an internal combustion engine, and blocks the fuel tank from the atmosphere;a canister that is provided between the atmosphere and the sealing valve on the communication passage, and recovers evaporated fuel discharged through the communication passage from the fuel tank;a canister internal pressure detection unit that is provided on the canister side relative to the sealing valve on the communication passage, and detects a canister internal pressure in the canister;a control part that performs an instruction for opening or closing the sealing valve, and controls a purge; anda diagnostic part that performs a function diagnosis of an evaporated fuel sealing system including the fuel tank, the canister, and the sealing valve, whereinthe diagnostic part performs the function diagnosis of the sealing valve based on whether or not the canister internal pressure detected by the canister internal pressure detection unit varies beyond a predetermined ...

EVAPORATED-FUEL PROCESSING APPARATUS

An evaporated-fuel processing apparatus including: a sealing valve which is arranged in a communication path between the atmosphere and a fuel tank mounted on a vehicle having an internal combustion engine, and shuts an internal space of the fuel tank off from the atmosphere; an open/close member which covers a fuel filling port of the fuel tank; a refueling-intention-information acquisition unit which acquires information indicating an intention of refueling; and a control unit which issues an opening command for opening the sealing valve when the refueling-intention-information acquisition unit acquires the information indicating an intention of refueling, and allows the open/close member to open when a time elapsed from the moment at which the opening command is issued exceeds a first predetermined time. 1. An evaporated-fuel processing apparatus comprising:a sealing valve which is arranged in a communication path between atmosphere and a fuel tank mounted on a vehicle having an internal combustion engine, and shuts an internal space of the fuel tank off from the atmosphere;an open/close member which covers a fuel filling port of the fuel tank;a refueling-intention-information acquisition unit which acquires information indicating an intention of refueling; anda control unit which issues an opening command for opening the sealing valve when the refueling-intention-information acquisition unit acquires the information indicating an intention of refueling, and allows the open/close member to open when a time elapsed from a moment at which the opening command is issued exceeds a first predetermined time.2. The evaporated-fuel processing apparatus according to claim 1 , further comprising a tank-internal-pressure detection unit which detects internal pressure of the fuel tank claim 1 , wherein the control unit allows the open/close member to open when the internal pressure of the fuel tank converges in a predetermined pressure range and the time elapsed from the ...

EVAPORATIVE EMISSION CONTROL SYSTEM FOR A VEHICLE

An evaporative emission control system for a vehicle includes an engine, a fuel tank connected to the engine and a reversible purge pump connected between the fuel tank and the engine. Fuel vapor generated in the fuel tank is supplied to the engine. The purge pump is operable in a first direction to supply the fuel vapor from the fuel tank to the engine and a second direction to supply air to the fuel tank. A purge control valve is connected between the reversible purge pump and the engine to control a flow of the fuel vapor to the engine. 1. An evaporative emission control system for a vehicle , comprising:an engine;a fuel tank connected to the engine, fuel vapor generated in the fuel tank being supplied to the engine;a reversible purge pump connected between the fuel tank and the engine, the reversible purge pump being operable in a first direction to supply the fuel vapor from the fuel tank to the engine and a second direction to supply air to the fuel tank;a purge control valve connected between the reversible purge pump and the engine to control a flow of the fuel vapor to the engine; anda mass air flow sensor disposed in an engine intake, a fault with the reversible purge pump or the purge control valve being detected when the mass air flow sensor does not detect air flow when the reversible purge pump is operated in the second direction.2. The evaporative emission control system according to claim 1 , whereina canister is disposed between the fuel tank and the reversible purge pump to store the fuel vapor exhausted from the fuel tank.3. The evaporative emission control system according to claim 2 , whereina controller connected to the purge control valve is configured to open the purge control valve to supply the fuel vapor from the canister to the engine.4. The evaporative emission control system according to claim 2 , whereina pressure sensor is connected to the canister to determine a pressure of the evaporative emission control system.5. The evaporative ...

VAPORIZED FUEL PROCESSING APPARATUS

A vaporized fuel processing apparatus for a vehicle having a fuel tank has a casing filled with an adsorbent and having a first outer surface. The casing has first ribs protruding from the first outer surface and extending without intersecting with each other. The casing has at least one second rib protruding from the first outer surface. At least one pair of the first ribs adjacent to each other are connected with each other via one of the second ribs only. The other pairs of the first ribs adjacent to each other are connected with each other via one of the second ribs only or are not connected with each other via any one of the second ribs. 1. A vaporized fuel processing apparatus for a vehicle having a fuel tank , the vaporized fuel processing apparatus comprising:a casing filled with an adsorbent and having a first outer surface;wherein the casing has first ribs protruding from the first outer surface and extending without intersecting with each other;wherein the casing has at least one second rib protruding from the first outer surface,wherein at least one pair of the first ribs adjacent to each other are connected with each other via one of the second ribs; andwherein the other pairs of the first ribs adjacent to each other are connected with each other via one of the second ribs only or are not connected with each other via any one of the second ribs.2. The vaporized fuel processing apparatus according to claim 1 ,wherein all of the first ribs are connected via one of the second ribs only.3. The vaporized fuel processing apparatus according to claim 1 ,wherein the casing is configured that when the vaporized fuel processing apparatus is mounted on the vehicle, the first outer surface is directed upward.4. The vaporized fuel processing apparatus according to claim 3 ,wherein the casing has a second outer surface opposite to the first outer surface and has a lattice shaped rib protruding from the second outer surface.5. The vaporized fuel processing apparatus ...

METHOD OF SWITCHING FROM A PRESSURIZED TO NON-PRESSURIZED FUEL SYSTEM WHEN AN EVAPORATIVE EMISSIONS LEAK IS DETECTED

A method of operating a fuel tank system in a non-hybrid vehicle is provided. The fuel tank system has a fuel tank, a carbon canister, a canister vent valve, a vapor management valve and an isolation valve fluidly connected between the fuel tank and the carbon canister. The fuel tank system is operated in a pressurized mode wherein the fuel tank is pressurized and the isolation valve is closed. The method determines whether a leak has been detected. The fuel tank system is operated in a non-pressurized mode based on the leak being detected. 1. A method of operating a fuel tank system in a non-hybrid vehicle , the fuel tank system having a fuel tank , a carbon canister , a canister vent valve , a vapor management valve and an isolation valve fluidly connected between the fuel tank and the carbon canister , the method comprising:operating the fuel tank system in a pressurized mode wherein a fuel tank of the fuel tank system is pressurized and the isolation valve is closed;determining whether a leak has been detected; andoperating the fuel tank system in a non-pressurized mode based on the leak being detected.2. The method of wherein operating the fuel tank system in the non-pressurized mode comprises:opening the isolation valve based on a leak being detected.3. The method of wherein operating the fuel tank system in the non-pressurized mode comprises:opening the canister vent valve permitting vapor to flow out of the carbon canister and through the canister vent valve.4. The method of wherein operating the fuel tank system in the non-pressurized mode comprises:opening the vapor management valve wherein vapor is permitted to flow out of the carbon canister and through the vapor management valve to an engine.5. The method of wherein operating the fuel tank system in the non-pressurized mode further includes illuminating a malfunction indicator lamp.6. The method of wherein operating the fuel tank system in the non-pressurized mode further includes changing an engine ...

MULTI-STAGE CHECK VALVE FOR VAPOR RECIRCULATION LINE OF LIQUID CONTAINMENT SYSTEM

Disclosed herein are liquid containment systems, methods for making such systems, and vehicle fuel storage systems having vapor recirculation capabilities. Presented is a liquid containment system for stowing hydrocarbon-based liquids. This system includes a vapor canister coupled to a liquid container to receive hydrocarbon vapor from the container. A fill conduit coupled to the container has an opening for receiving a fill nozzle. A vapor recirculation transmits vapor from the container to the fill conduit. A multi-stage check valve, which is coupled to the container and recirculation conduit, has a housing and a plunger with a bleed hole. The plunger seats against the housing such that vapor passes from the container through the bleed hole to the fill conduit via the recirculation conduit. Responsive to increased in-tank pressure, the plunger unseats from the housing such that vapor passes through the bleed hole and around the plunger to the fill conduit. 1. A liquid containment system for stowing a hydrocarbon-based liquid discharged from a fill nozzle , the liquid containment system comprising:a liquid container configured to stow therein the hydrocarbon-based liquid;a vapor canister fluidly coupled to the liquid container and configured to receive and store hydrocarbon vapor from the hydrocarbon-based liquid stowed in the liquid container;a fill conduit fluidly coupled to the liquid container, the fill conduit having an open end configured to receive the hydrocarbon-based liquid from the fill nozzle;a vapor recirculation conduit fluidly coupled to the liquid container and to the fill conduit proximate the open end thereof, the vapor recirculation conduit being configured to transmit hydrocarbon vapor from the liquid container to the fill conduit; anda multi-stage check valve assembly fluidly coupled to the liquid container and the vapor recirculation conduit, the check valve assembly having a housing and a plunger with a bleed hole, the plunger being movable ...

METHOD AND SYSTEM FOR HIGH FUEL VAPOR CANISTER PURGE FLOW

Methods and systems are provided for managing fuel vapors in a vehicle fuel system. In one example, a method includes commanding or maintaining closed a vapor blocking valve during a purging operation such that vapor flow is directed from a fuel tank to a fresh air side of a vapor canister via a first restricted vapor line, thereby enabling high purge flow rates and deep vapor canister vacuum while avoiding fuel tank vacuum. In this way, canister purge operation may be made more efficient, thereby reducing hydrocarbon bleed emissions. 1. A method for an engine , comprising:during a first condition, closing a vacuum blocking valve (VBV) and directing vapor flow from a fuel tank to a fresh air side of a vapor canister via a first vapor line; andduring a second condition, opening the VBV and directing vapor flow from the fuel tank to a load/purge side of the vapor canister via a second vapor line.2. The method of claim 1 , wherein directing vapor flow via the first vapor line comprises directing vapor flow through a restriction in the first vapor line.3. The method of claim 2 , wherein the restriction is comprised of an orifice or a sonic choke.4. The method of claim 2 , wherein an overall vapor line bifurcates upstream of the restriction into the first vapor line and second vapor line claim 2 , wherein the VBV is positioned in the second vapor line.5. The method of claim 1 , wherein the first condition comprises engine operation.6. The method of claim 1 , wherein the first vapor line does not couple the fuel tank to the load/purge side of the vapor canister.7. The method of claim 1 , wherein the first condition comprises a canister purge event.8. The method of claim 7 , wherein the vapor canister is divided into the fresh air side and the load/purge side by a partition housed within the canister claim 7 , the fresh air side further including a vent line connected to fresh air via a canister vent valve (CVV) claim 7 , the load/purge side connected to an intake manifold ...

SYSTEM AND METHODS FOR REGULATING FUEL VAPOR FLOW IN A FUEL VAPOR RECIRCULATION LINE

Methods and systems are provided for regulating the flow of fuel vapors exiting a fuel tank. In one example, a method for an engine may include adjusting an amount of fuel vapors flowing through a fuel vapor recirculation line, where the recirculation line may be coupled on a first end to a fuel tank and on an opposite second end to a fuel fill inlet. The valve may be adjusted to a more open position to increase fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from a fuel vapor canister, and to a more closed position to reduce fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from the fuel fill inlet. 1. A method for an engine comprising:adjusting an amount of fuel vapors flowing through a fuel vapor recirculation line, the line coupled on a first end to a fuel tank and on an opposite second end to a fuel fill inlet, by adjusting a position of a variable orifice valve positioned within the recirculation line, via an electronic controller.2. The method of claim 1 , wherein the adjusting is based on one or more of a fuel tank pressure claim 1 , canister loading claim 1 , fuel dispense rate claim 1 , a first hydrocarbon emission level from a fresh air vent coupled to a fuel vapor canister claim 1 , and a second hydrocarbon emissions level from the fuel fill inlet.3. The method of claim 2 , wherein the fuel tank pressure claim 2 , fuel dispense rate claim 2 , and fuel level are estimated based on outputs from a pressure sensor coupled between the fuel tank and the canister claim 2 , and configured to measure a pressure in said fuel tank.4. The method of claim 2 , where the first hydrocarbon emission level is estimated based on outputs from a first hydrocarbon sensor positioned in the fresh air vent claim 2 , and where the second hydrocarbon emission level is estimated based on outputs from a second hydrocarbon sensor positioned in the fuel fill inlet.51. The method of claim 2 ...

Fuel vapor processing system

The present disclosure provides a fuel vapor processing system. The system includes a tank passage, a canister, a purge passage, an air passage, a purge valve, a controller, a fuel vapor processing portion, a pressure sensor, a fuel refill detecting portion, and an abnormality detecting portion. The fuel refill detecting portion detects that fuel refill to the fuel tank is started or fuel refill to the fuel tank is being performed by executing a fuel refill detecting process. An abnormality detecting portion detects, by executing an abnormality detecting process, a clogged situation where the tank passage is clogged based on a signal from the pressure sensor received after the fuel refill detecting portion detected that the fuel refill to the fuel tank was started.

METHOD AND SYSTEM FOR FUEL VAPOR MANAGEMENT

Methods and systems are provided for improving the efficiency of canister purge completion. Based on engine operating conditions, a canister is purged to a compressor inlet or a throttle outlet. During purging conditions, as canister loads change, a purge flow through the canister is varied so that a fixed preselected portion of total engine fueling is delivered as fuel vapors. 1. A method of canister purging comprising:controlling an air flow rate into an engine to achieve an operator demand for power, the air flow rate provided from a compressor or from induction by the engine through a throttle; and controlling flow of a purge mixture when said fuel vapor flow rate reaches a preselected proportion of fuel flow rate and fuel vapor flow rate, including maintaining a fuel vapor fraction of the total engine fuel as engine fueling changes with load even if a higher purge flow rate is possible.2. The method of claim 1 , further comprising claim 1 , purging a mixture of fuel vapors and ambient air from a fuel vapor storage canister claim 1 , and dependent upon engine operating conditions claim 1 , routing said purged mixture into a position upstream of said air compressor.3. The method of claim 1 , further comprising claim 1 , purging a mixture of fuel vapors and ambient air from a fuel vapor storage canister claim 1 , and dependent upon engine operating conditions claim 1 , routing said purged mixture into a position downstream of said compressor.4. The method of claim 1 , further comprising claim 1 , determining fuel vapor flow rates downstream or upstream of said compressor from an indication of flow rate of said purge mixture and an indication of fuel vapor content of said purge mixture; and delivering the fuel to the engine at a rate to achieve a substantially stoichiometric air-fuel ratio of a total of said controlled air flow entering said engine and said ambient air in said purge mixture entering said engine to a total of said liquid fuel and said fuel vapor ...

METHODS AND SYSTEMS FOR EVAPORATIVE EMISSIONS CONTROL

Methods and systems are provided for reducing evaporative emissions from a vehicle by performing a fine leak test at a vehicle assembly plant. Fuel tank pressure generated after a green tank fueling event is monitored as the vehicle moves along an assembly line. A leak is determined based on a rate of pressure bleed-up over the duration, and accordingly the vehicle is directed to a repair station. 1. A method , comprising:on only a first initial fuel tank filling event while a vehicle is on an assembly line, with no prior fuel filling event,filling the fuel tank to a threshold level; andsealing the fuel tank; andindicating degradation of a fuel system based on a change in fuel tank pressure while the vehicle moves along the assembly line.2. The method of claim 1 , wherein the first initial fuel tank filling event is a first filling event from an initial assembly of the vehicle claim 1 , and wherein the threshold level is based on a target fuel tank pressure at the sealing.3. The method of claim 1 , wherein sealing the fuel tank includes sealing the fuel tank from atmosphere by closing a vent valve of the fuel system claim 1 , and sealing the fuel tank from an engine by closing a purge valve of the fuel system.4. The method of claim 3 , wherein the engine is maintained shutdown during the fuel tank filling event and while the vehicle moves along the assembly line.5. The method of claim 4 , wherein filling the fuel tank is performed at a first station of the assembly line claim 4 , the method further comprising claim 4 , in response to the vehicle arriving at a second claim 4 , different station of the assembly line claim 4 , unsealing the fuel tank by opening the purge valve and the vent valve claim 4 , and performing a first combustion event in the engine since the initial assembly of the vehicle.6. The method of claim 5 , wherein the indicating includes:in response to a rate of pressure bleed-down between the first station and the second station being higher than a ...

LEAKAGE DIAGNOSTIC DEVICE FOR EVAPORATED FUEL TREATMENT APPARATUS

An evaporated fuel treatment apparatus includes: a canister; a purge passage; a purge pump provided in the purge passage; and an atmosphere passage communicating with the canister. A leakage diagnostic device includes: two bypass passages provided between the purge passage on the upstream side of the purge pump and the atmosphere passage; a reference orifice; two three-way valves; a pressure sensor; and an ECU. When operating the purge pump under a predetermined condition, the ECU controls the two three-way valves to set a mode in which atmospheric air is pressure-fed into an air intake passage through the reference orifice and the purge pump, and a mode in which vapors in the canister are pressure-fed into the air intake passage through the reference orifice and the purge pump, and determines leakage by comparing a reference pressure and a leakage pressure that are measured when these modes are set.

CANISTER

A canister includes a first chamber and a second chamber, an inner wall, a charge port, a purge port, an atmosphere port, and an insulator. An adsorbent is placed in the first chamber and the second chamber. The inner wall is located adjacent to the first chamber and the second chamber, and partitions the first chamber and the second chamber. The insulator is provided to at least one of the first chamber or the second chamber. The insulator is arranged between the adsorbent and the inner wall so as to insulate the adsorbent that is placed in the first chamber or the second chamber, to which the insulator is provided, from the inner wall. 1. A canister including a casing in which an adsorbent to adsorb evaporated fuel generated in a fuel tank of a vehicle is placed , the canister comprising:a first chamber and a second chamber provided in the casing, the adsorbent being placed in the first chamber and the second chamber;an inner wall formed as a part of the casing and located adjacent to the first chamber and the second chamber, the inner wall partitioning the first chamber and the second chamber;a charge port configured to allow the evaporated fuel to flow into the casing, the charge port being provided to the first chamber;a purge port configured to discharge the evaporated fuel adsorbed by the adsorbent out of the casing, the purge port being provided to the first chamber;an atmosphere port configured to allow an atmosphere to flow into the casing, the atmosphere port being provided to the second chamber; andan insulator provided to at least one of the first chamber or the second chamber,wherein the insulator is arranged between the adsorbent and the inner wall so as to insulate the adsorbent that is placed in the first chamber or the second chamber, to which the insulator is provided, from the inner wall.2. The canister according to claim 1 ,wherein the insulator forms a space between the inner wall and the adsorbent placed in the first chamber or the second ...

FRESH AIR PATH HYDROCARBON TRAP SYSTEM

A system for minimizing hydrocarbon vapor emissions includes a fuel vapor adsorption canister and a fresh air vent line from the fuel adsorption canister to an ambient environment to vent the fuel vapor adsorption canister. The fresh air vent line includes one or more hydrocarbon trap sections. The one or more hydrocarbon trap sections of the fresh air vent line adsorb hydrocarbon emissions from the fuel vapor adsorption canister to minimize hydrocarbon emissions to the ambient environment. 1. An automotive vehicle , comprising:an engine;a fuel supply coupled to the engine such that a fluid travels between the fuel supply to the engine;a fuel vapor adsorption canister;a first passage from the fuel supply to the fuel vapor adsorption canister;a second passage from the fuel vapor adsorption canister for venting the canister, the second passage comprising at least one hydrocarbon trap section; anda third passage from the fuel vapor adsorption canister to the engine;wherein the at least one hydrocarbon trap section of the second passage adsorbs hydrocarbon emissions from the fuel vapor adsorption canister to minimize hydrocarbon emissions to an ambient environment.2. The automotive vehicle of claim 1 , wherein the at least one hydrocarbon trap section comprises at least one trough formed in the second passage and wherein at least a portion of the trough comprises a hydrocarbon adsorbent material.3. The automotive vehicle of claim 1 , wherein the second passage is a flexible line comprising at least one hydrocarbon trap section formed on a portion of an interior surface of the flexible line.4. The automotive vehicle of claim 1 , wherein the second passage is a flexible line comprising a hydrocarbon adsorbent material formed on an entirety of an interior surface of the flexible line.5. The automotive vehicle of further comprising an air filter claim 1 , wherein the second passage connects the fuel vapor adsorption canister to the air filter.6. A system for minimizing ...

CONDUIT MOUNTING DEVICE

A device for mounting a conduit of a vapor canister on a vehicle includes a base having a first side and an opposing second side. The base includes fastener openings for receiving fasteners to attach the base to a frame. A connector extends from the first side of the base between the fastener openings for connecting the device to a conduit of a vapor canister. A pipe having an inlet extends from the second side of the base and forms an air passage from the inlet to the connector. The device may also include supports on the second side of the base for supporting the device on frame members with rounded or flat surfaces. The conduit mounting device can be installed by attaching the device on a frame member without the need for tools. 1. A conduit mounting device comprising:a base having a first side and an opposing second side, the base comprising a pair of fastener openings for receiving fasteners to attach the base to a tubular frame of a vehicle;a connector extending from the first side of the base between the pair of fastener openings for connecting to a conduit;a pipe extending from the second side of the base, the pipe having an inlet and forming a passage from the connector to the inlet.2. The conduit mounting device of further comprising a cap on an end of the pipe.3. The conduit mounting device of wherein the inlet is positioned on a side of the pipe.4. The conduit mounting device of further comprising a plurality of supports projecting from the second side of the base.5. The conduit mounting device of wherein the supports are spaced apart to receive a frame member having a rounded surface claim 4 , and wherein the supports are further configured to define a planar surface for contacting a frame member having a corresponding planar surface.6. The conduit mounting device of wherein the supports have a sloped side wall.7. The conduit mounting device of wherein the supports have a planar upper surface.8. The conduit mounting device of wherein the mounting device ...

FUEL PUMP CONTROLLER INTEGRATED WITH AIR FILTER

A fuel pump controller having an integrated air filter includes: a mounting plate fixed to a fuel tank; a motor driver provided on the mounting plate; an air filter having a filter sheet disposed inside a filter case to remove a foreign substance from air and having an air inlet port for air introduction; and an air outlet port for discharging the air, which has passed through the filter sheet. The filter case is integrally disposed on the mounting plate to enable heat exchange between the air passing therethrough and the motor driver. 1. A fuel pump controller comprising:a mounting plate fixed to a fuel tank; a filter sheet inside a filter case to remove a foreign substance from air;', 'an air inlet port for introduction of the air into the filter case; and', 'an air outlet port for discharge of the air, which has passed through the filter sheet in the filter case to remove the foreign substance,, 'a motor driver, which is configured to drive a fuel pump, disposed on the mounting plate; and an air filter includingwherein the mounting plate includes an accommodating portion in which the motor driver is accommodated,wherein at least a portion of the mounting plate includes a boundary which separates an inner space of the filter case from an inner space of the accommodating portion, andwherein the filter case is integrally disposed on the mounting plate to enable heat exchange between the air passing through the filter case and the motor driver through the boundary of the mounting plate.2. The fuel pump controller of claim 1 , wherein the fuel tank is a liquefied petroleum gas (LPG) bombe claim 1 , and the fuel pump is an LPG fuel pump of the LPG bombe.3. The fuel pump controller of claim 1 , wherein the mounting plate hermetically seals an opening of the fuel tank claim 1 ,wherein the accommodating portion is disposed in an inner surface of the mounting plate that faces an inside of the fuel tank, andwherein the filter case is integrally disposed on an outer surface ...

Evaporative emissions system and method for a stop/start vehicle

Systems and methods for diagnosing individual components of an evaporative emissions system are presented. In one example, fuel vapor flow may be a basis for determining whether or not selected emission system components may be degraded. Further, fuel tank pressure may be another basis for determining component whether or not selected emissions system components may be degraded.

CANISTER STRUCTURE

A canister structure comprising: a canister in which activated carbon is accommodated, the activated carbon being for adsorbing evaporated fuel produced in a fuel tank; an atmosphere vent tube connected to the canister the atmosphere vent tube introducing air into the canister and causing evaporated fuel adsorbed by the activated carbon to be desorbed when a negative pressure acts in the canister and a fuel pump controller disposed in the canister the fuel pump controller controlling flow rates of fuel being supplied from the fuel tank to an engine, and the fuel pump controller generating heat due to being operated. 1. A canister structure comprising:a canister in which activated carbon is accommodated, the activated carbon being for adsorbing evaporated fuel produced in a fuel tank;an atmosphere vent tube connected to the canister, the atmosphere vent tube introducing air into the canister and causing evaporated fuel adsorbed by the activated carbon to be desorbed when a negative pressure acts in the canister; anda fuel pump controller disposed in the canister, the fuel pump controller controlling flow rates of fuel being supplied from the fuel tank to an engine, and the fuel pump controller generating heat due to being operated.2. The canister structure according to claim 1 , wherein dividing walls having thermal conductivity are plurally arranged in the canister claim 1 , and the activated carbon is packed in between neighboring dividing walls.3. The canister structure according to claim 2 , wherein the fuel pump controller comprises a circuit board and an accommodation portion claim 2 , the accommodation portion accommodating the circuit board and having thermal conductivity claim 2 , and wherein the accommodation portion is in contact with at least a portion of the dividing walls.4. The canister structure according to claim 1 , wherein at least a portion of a canister case that structures an outer shell of the canister is formed of a material having thermal ...

FUEL SYSTEM DIAGNOSTICS

Methods and system are provided for distinguishing fuel tank vacuum generation due to canister purge valve degradation from vacuum generation due to canister vent valve degradation. A fuel tank vacuum level is monitored after sealing the fuel tank from the atmosphere following an engine pull-down. If there is an ensuing change in fuel tank vacuum, canister purge valve degradation is determined, else, canister vent valve degradation is determined. 1. A method for an engine , comprising:sealing a fuel system after an engine pull-down; anddistinguishing degradation of a canister vent valve from degradation of a canister purge valve based on a change in fuel system vacuum following the sealing.2. The method of claim 1 , wherein sealing the fuel vapor system includes closing the canister vent valve to seal the fuel system from atmosphere claim 1 , and closing the canister purge valve to seal the fuel system from engine intake.3. The method of claim 2 , wherein the distinguishing includes claim 2 , in response to fuel system vacuum being higher than a threshold before the sealing and being lower than the threshold after the sealing claim 2 , indicating canister purge valve degradation and not indicating canister vent valve degradation.4. The method of claim 3 , wherein indicating canister purge valve degradation includes indicating that the canister purge valve is stuck open.5. The method of claim 3 , further comprising claim 3 , in response to fuel system vacuum being higher than the threshold before the sealing and after the sealing claim 3 , actuating the canister purge valve closed while actuating the canister vent valve open claim 3 , and indicating canister vent valve degradation but not canister purge valve degradation in response to the fuel system vacuum remaining higher than the threshold after the actuating.6. The method of claim 5 , wherein indicating canister vent valve degradation includes indicating that a canister vent valve solenoid is stuck closed.7. The ...

CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

The control device of an internal combustion engine of the present invention is a control device of an internal combustion engine in which a bypass channel () for bypassing a throttle valve () of an engine intake system () via an evaporated fuel adsorption device is provided as a fuel emission path to an evaporated fuel adsorption device () for adsorbing evaporated fuel in a fuel tank (), and exhaust gas recirculation is implemented for recirculating exhaust gas via an exhaust gas recirculation passage () connected upstream of the entrance of the bypass channel of the engine intake system. An exhaust control valve () is disposed in the exhaust gas recirculation passage, intake control valves () are disposed in the bypass channel, and when the opening degree of the exhaust control valve is greater than a set opening degree, either the intake control valve is fully closed or the opening degree of the intake control valve is reduced in comparison with times when the opening degree of the exhaust control valve is equal to or less than the set opening degree. 1. A control system of an internal combustion engine where an evaporated fuel adsorption device which adsorbs evaporated fuel in a fuel tank is provided , a bypass passage which bypasses a throttle valve of an engine intake system through said evaporated fuel adsorption device is provided at said evaporated fuel adsorption device as a fuel discharge path , and exhaust gas is made to recirculate through an exhaust gas recirculation passage which is connected to an upstream side from an inlet of said bypass passage of said engine intake system for exhaust gas recirculation , whereinan exhaust control valve is arranged at said exhaust gas recirculation passage,an intake control valve is arranged at said bypass passage, andwhen an opening degree of said exhaust control valve is larger than a set opening degree, said intake control valve is fully closed or an opening degree of said intake control valve is made smaller ...

Fuel tank system

A first pressure sensor capable of detecting pressure in a narrow pressure range with a high accuracy to detect internal pressure in the fuel tank is arranged in the fuel tank, and a second pressure sensor that is capable of detecting pressure in a wide pressure range with a low accuracy with respect to the first pressure sensor, and is capable of detecting internal pressure of the fuel tank, is arranged in vapor piping between the fuel tank and a tank blocking valve. When a filler lid switch is operated to release internal pressure of the fuel tank, the first pressure sensor detects internal pressure of the fuel tank so that an operation of the tank blocking valve is controlled on the basis of the detection result, and then a filler lid is opened when the internal pressure of the fuel tank becomes the atmospheric pressure.

FUEL TANK SYSTEM

A first pressure sensor that detects pressure in a narrow pressure range with a high accuracy is provided in a fuel tank, and a second pressure sensor that detects pressure in a wide pressure range with a low accuracy with respect to the first pressure sensor is provided in vapor piping between the fuel tank and a tank blocking valve. Until internal pressure of the fuel tank becomes a second predetermined pressure, meter indication is performed on a display on the basis of a second tank internal pressure P2 calculated by the second pressure sensor and an atmospheric pressure sensor, and when internal pressure of the fuel tank becomes less than the second predetermined pressure, the meter indication is performed on the display on the basis of a first tank internal pressure P1 obtained by the first pressure sensor until internal pressure of the fuel tank becomes a fifth predetermined pressure. 1. A fuel tank system comprising:a fuel tank mounted on a vehicle;a canister that absorbs a fuel evaporative emission released from the fuel tank;piping that connects the canister and the fuel tank;a blocking valve that is provided in the piping to block the fuel tank;a filling starting part that instructs a start of filling to the fuel tank;a first pressure detector arranged in the fuel tank to detect pressure in the fuel tank;a second pressure detector that detects the pressure in the fuel tank with an accuracy different from an accuracy of the first pressure detector;a pressure reduction control part that reduces the pressure in the fuel tank to a predetermined pressure by opening the blocking valve when a start of filling is instructed by the filling starting part;a filling permission part that permits filling when the pressure in the fuel tank becomes the predetermined pressure or less with the pressure reduction control part; andan indication part that indicates a progress degree of reduction of the pressure in the fuel tank during a period from the instruction of the ...

VAPOR RETURN SYSTEM OF A FUEL VAPOR COLLECTING TANK

A vapor return system of a fuel vapor collecting tank includes a vapor outlet line with a first stop valve, which is arranged in the vapor outlet line of the fuel vapor collecting tank. A first vapor return branch is arranged between the vapor outlet line of the fuel vapor collecting tank and a charge air duct of a compressor in a turbocharger. A second vapor return branch is arranged between the vapor outlet line of the fuel vapor collecting tank and a fresh air suction duct of the compressor of the turbocharger. The first vapor return branch is connected by a first check valve to the charge air duct. The second vapor return branch is connected by a second check valve to a suction inlet of a venturi nozzle situated in a bypass line between the charge air duct and fresh air suction duct via a second stop valve. 112-. (canceled)13. A vapor return system comprising:a fuel vapor collecting tank having a vapor outlet line;a first stop valve arranged in the vapor outlet line;a first vapor return branch between the vapor outlet line and a charge air duct of a compressor of a turbocharger;a second vapor return eh between the vapor outlet line and a fresh air suction duct of the compressor;wherein the first vapor return branch is connected by a first check valve to the charge air duct; andwherein the second vapor return branch is connected by a second check valve to a suction inlet of a Venturi nozzle situated in a bypass line between the charge air duct and fresh air suction duct via a second stop valve.14. The vapor return system according to claim 13 , further comprising a throttle flap arranged in the charge air duct claim 13 , and wherein the first vapor return branch is connected with the charge air duct downstream from the throttle flap.15. The vapor return system according to claim 13 , further comprising an engine control module operably coupled to the first and second stop valves by way of control lines.16. The vapor return system according to claim 13 , further ...

SYSTEM AND METHOD FOR DIAGNOSING A DUAL PATH PURGE SYSTEM USING A HYDROCARBON SENSOR AND FOR DIAGNOSING A HYDROCARBON SENSOR IN A SINGLE PATH PURGE SYSTEM OR A DUAL PATH PURGE SYSTEM

A system according to the present disclosure includes a valve control module, a purge fraction module, and a diagnostic module. The valve control module opens a purge valve in an evaporative emissions system to allow purge vapor to flow to an intake system of an engine. The purge fraction module determines first and second fractions of purge vapor delivered to the engine relative to a total amount of air and purge vapor delivered to the engine based on first and second inputs, respectively. The first input is from a hydrocarbon sensor disposed in the evaporative emissions system of the engine. The second input is from an oxygen sensor disposed in an exhaust system of the engine. The diagnostic module selectively diagnoses a fault in at least one of the evaporative emissions system and the hydrocarbon sensor based on the first and second purge fractions when the purge valve is open. 1. A system comprising:a valve control module that selectively opens a purge valve in an evaporative emissions system to allow purge vapor to flow to an intake system of an engine; determines a first fraction of purge vapor delivered to the engine relative to a total amount of air and purge vapor delivered to the engine based on a first input from a hydrocarbon sensor disposed in the evaporative emissions system of the engine; and', 'determines a second fraction of purge vapor delivered to the engine relative to the total amount of air and purge vapor delivered to the engine based on a second input from an oxygen sensor disposed in an exhaust system of the engine; and, 'a purge fraction module thata diagnostic module that selectively diagnoses a fault in at least one of the evaporative emissions system and the hydrocarbon sensor based on the first and second purge fractions when the purge valve is open.2. The system of wherein the diagnostic module selectively diagnoses a fault in the at least one of the evaporative emissions system and the hydrocarbon sensor based on a difference between ...

PURGE VALVE DETACHMENT DIAGNOSTIC SYSTEMS AND METHODS

A diagnostic system for a vehicle includes a purge valve control module that closes a purge valve. The purge valve regulates fuel vapor flow from a fuel vapor canister to an intake system of an engine. A pump control module, after the closing of the purge valve, turns on a pump that pumps fuel vapor toward the purge valve. A first pressure module, after the purge valve is closed, determines a first pressure measured using a pressure sensor located between the pump and the purge valve. A second pressure module, after the determination of the first pressure and while the pump is on, determines a second pressure measured using the pressure sensor located between the pump and the purge valve. A diagnostic module selectively diagnoses detachment of the purge valve from the intake system based on the first and second pressures. 1. A diagnostic system for a vehicle , comprising:a purge valve control module that closes a purge valve that regulates fuel vapor flow from a fuel vapor canister to an intake system of an engine;a pump control module that, after the closing of the purge valve, turns on a pump that pumps fuel vapor toward the purge valve;a first pressure module that, after the purge valve is closed, determines a first pressure measured using a pressure sensor located between the pump and the purge valve;a second pressure module that, after the determination of the first pressure and while the pump is on, determines a second pressure measured using the pressure sensor located between the pump and the purge valve; anda diagnostic module that selectively diagnoses detachment of the purge valve from the intake system based on the first and second pressures.2. The diagnostic system of further comprising a difference module that determines a pressure difference based on the second pressure minus the first pressure claim 1 ,wherein the diagnostic module diagnoses the detachment of the purge valve when the pressure difference is less than a predetermined pressure.3. The ...

SYSTEMS AND METHODS FOR DIAGNOSING COMPONENTS IN A VEHICLE EVAPORATIVE EMISSIONS SYSTEM

Methods and systems are provided for conducting a canister purging operation and for rationalizing components of a vehicle evaporative emission system. In one example, after completion of a refueling event, a first fuel vapor canister purge operation is conducted to desorb hydrocarbon light ends from the fuel vapor canister, and subsequently the canister is heated to desorb hydrocarbon heavy ends from the canister, which are routed to a hydrocarbon sensor to rationalize the hydrocarbon sensor, before being purged to engine intake in a second purging operation. In this way, a fuel vapor storage canister may be thoroughly cleaned of hydrocarbon light ends and hydrocarbon heavy ends, while additionally indicating whether a canister heating element, and a hydrocarbon sensor positioned between the canister and atmosphere, are functioning as desired. 1. A method comprising:capturing and storing fuel vapors in a fuel vapor storage canister positioned in a vehicle evaporative emission system, the fuel vapor canister removably coupled to a fuel tank that provides fuel to an engine that propels the vehicle;actively routing fuel vapors from the fuel vapor canister into a vent line coupling the fuel vapor canister to atmosphere; anddiagnosing one or more evaporative emission system components responsive to the routing.2. The method of claim 1 , wherein actively routing fuel vapors from the fuel vapor canister into the vent line includes activation of a canister heating element coupled to and/or within the fuel vapor canister to promote desorption of fuel vapors stored in the fuel vapor canister.3. The method of claim 2 , wherein actively routing fuel vapors from the fuel vapor canister further comprises:sealing the fuel vapor canister from atmosphere, from an intake manifold of the engine, and from the fuel tank during activation of the canister heating element; andresponsive to the canister heating element being activated for a predetermined duration of time or until a ...

FUEL VAPOR PURGE SYSTEM

A fuel vapor purge system may include a recirculation line that is branched from an intake line that supplies intake air to an engine to join to the intake line of the rear end portion of a compressor of a turbocharger; an ejector that is integrally formed with a recirculation valve housing that is disposed at a point in which the recirculation line and the intake line join; a first purge line that connects a canister and the intake line; and a second purge line that connects the canister and the ejector. 1. A fuel vapor purge system , comprising:a recirculation line that is branched from an intake line that supplies intake air to an engine to join to the intake line of the rear end portion of a compressor of a turbocharger;an ejector that is integrally formed with a recirculation valve housing that is positioned at a point in which the recirculation line and the intake line join;a first purge line that connects a canister and the intake line; anda second purge line that connects the canister and the ejector.2. The fuel vapor purge system of claim 1 , wherein the ejector includes:a trunk portion having a flow channel therein;a first inlet that fluidically-communicates with the flow channel and that fluidically-communicates with the intake line of the rear end portion of the compressor;a second inlet that fluidically-communicates with the flow channel and that fluidically-communicates with the second purge line; andan outlet that fluidically-communicates with the flow channel and that fluidically-communicates with the recirculation line.3. The fuel vapor purge system of claim 2 , wherein the first inlet and the outlet are located on a same axis along the flow channel claim 2 , andthe second inlet is located vertically to the flow channel.4. The fuel vapor purge system of claim 2 , wherein a cross-section of the fluid path increases as advancing to the outlet while decreasing from the first inlet according to fluid flow.5. The fuel vapor purge system of claim 1 , ...

SYSTEM AND METHODS FOR FUEL VAPOR CANISTER FLOW

Methods and systems are provided for regulating the flow of fuel vapor in an evaporative emissions system. In one example, a method may include re-routing fuel tank vapors responsive to an indication of a leaky canister purge valve such that fuel tank vapors may be efficiently adsorbed by a fuel vapor canister during engine-off conditions, rather than bypassing the fuel vapor canister and being released to the atmosphere. In this way, evaporative emissions may be prevented during the duration of time following an indication of a leaky canister purge valve and servicing the vehicle. 1. A method comprising:when an engine is operating, routing vapors from a fuel tank through a purge valve, and routing desorbed vapors from a vapor adsorbent through said purge valve, into said engine for combustion; andwhen said purge valve is detected as leaking and said engine is not operating, changing said routing so that said fuel tank vapors are first routed through said vapor adsorbent for adsorption and then to said purge valve.2. The method recited in claim 1 , wherein said vapors from said fuel tank are routed through a buffer adsorbent before said routing through said purge valve claim 1 , and said desorbed vapors from said vapor adsorbent are routed through said buffer adsorbent before said routing through said purge valve claim 1 , said buffer adsorbent is substantially smaller than said vapor adsorbent.3. The method recited in claim 1 , further comprising closing said purge valve and routing said fuel tank vapors across said vapor adsorbent to atmosphere when said engine is turned off and said purge valve is not detected as leaking.4. The method recited in claim 1 , wherein said vapor adsorbent is housed in a canister and further comprising: venting said canister to atmosphere when said purge valve is not detected as leaking; and isolating said canister from atmosphere when said purge valve is detected as leaking and said engine is turned off.5. The method recited in claim ...

METHOD TO DETERMINE CANISTER LOAD

Methods and systems are provided for determining a load of a canister included in an evaporative emissions system of a vehicle. One example method comprises flowing each of purge vapors, refueling vapors, and breakthrough vapors through a common hydrocarbon sensor and using output from the hydrocarbon sensor based on the flowing of different vapors to estimate the load of the canister. 1. A method for an evaporative emissions system in a vehicle , comprising:routing each of a purge flow from a fuel vapor canister, a loading flow into the fuel vapor canister, and a breakthrough flow from the fuel vapor canister through a hydrocarbon sensor; anddetermining a load of the fuel vapor canister based on output from the hydrocarbon sensor during each of the routings.2. The method of claim 1 , wherein the purge flow from the fuel vapor canister is delivered to an intake manifold of an engine of the vehicle claim 1 , the loading flow into the fuel vapor canister is received from a fuel tank coupled in the vehicle claim 1 , and the breakthrough flow is directed to atmosphere from the fuel vapor canister.3. The method of claim 2 , wherein the purge flow from the fuel vapor canister includes purge vapors claim 2 , and breakthrough flow includes breakthrough vapors.4. The method of claim 3 , wherein the loading flow into the fuel vapor canister from the fuel tank includes one or more of refueling vapors claim 3 , diurnal vapors claim 3 , and running loss vapors.5. The method of claim 4 , wherein output from the hydrocarbon sensor includes a first amount of fuel vapors in the loading flow claim 4 , a second amount of fuel vapors in the purge flow claim 4 , and a third amount of breakthrough vapors in the breakthrough flow.6. The method of claim 5 , wherein determining the load of the fuel vapor canister based on output from the hydrocarbon sensor includes subtracting each of the second amount of fuel vapors in the purge flow and the third amount of fuel vapors in the breakthrough ...

PURGE CONTROL VALVE DEVICE

In a purge control valve device, a purge valve includes a first electromagnetic valve and a second electromagnetic valve which are provided inside a housing. The first electromagnetic valve has a first valve body that controls a flow rate of evaporative fuel flowing in the housing. The second electromagnetic valve has a second valve body that controls a flow rate of evaporative fuel flowing in the housing. The upstream passage and the downstream passage are arranged in series. The first electromagnetic valve switches a seated state and an unseated state of the first valve body. The purge valve has a narrowed passage in which a flow rate of the evaporative fuel is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state. 1. A purge control valve device comprising:an inflow port into which the evaporative fuel flowing out of a canister flows;an outlet port through which the evaporative fuel flows out toward an engine;a housing having an in-housing passage connecting the inflow port and the outflow port;a first electromagnetic valve provided inside the housing and having a first valve body opening and closing a first internal passage included in the in-housing passage to control a flow rate of the evaporative fuel; anda second electromagnetic valve provided inside the housing and having a second valve body opening and closing a second internal passage included in the in-housing passage to control a flow rate of the evaporative fuel, whereinthe first internal passage and the second internal passage are arranged in series in the in-housing passage,the first electromagnetic valve and the second electromagnetic valve are controlled to operate individually, andthe first electromagnetic valve is switched between a seated state in which the first valve body contacts a first valve seat and an unseated state in which the first valve body is separated from the first valve seat,the purge control valve device further ...

TANK VENTING DEVICE FOR A FUEL TANK, AND VEHICLE

A tank venting device for a fuel tank that supplies an internal combustion engine with a fuel includes a fuel vapor sorption system that is configured for reversibly storing fuel vapor in, and removing it from, the fuel tank, wherein the tank venting device includes at least one purge device, which is operable independently of the internal combustion engine, for applying a motive flow to the fuel vapor sorption system in the direction opposite from the fuel tank, so that the fuel vapor sorption system can be purged via a purge line, wherein the purge device includes at least one control device for controlling the motive flow. 1. A tank venting device for a fuel tank that supplies an internal combustion engine with a fuel , the tank venting device comprising:a fuel vapor sorption system that is configured for reversibly storing fuel vapor in, and removing it from, the fuel tank,at least one purge device, which is operable independently of the internal combustion engine, for applying a motive flow to the fuel vapor sorption system in the direction opposite from the fuel tank, so that the fuel vapor sorption system can be purged via a purge line,wherein the purge device includes at least one control device for controlling the motive flow.2. The tank venting device according to claim 1 , wherein the control device includes at least one control valve.3. The tank venting device according to claim 2 , wherein the at least one control valve is situated downstream from the purge device claim 2 , relative to the applied motive flow.4. The tank venting device according to claim 1 ,wherein the fuel vapor sorption system includes at least one tank vent valve, andwherein the at least one tank vent valve is situated upstream from the purge device and/or upstream from the internal combustion engine, relative to the applied motive flow.5. The tank venting device according to claim 1 , further comprising at least one Venturi nozzle in parallel to the purge device claim 1 , so that ...

EVAPORATED FUEL TREATMENT APPARATUS

An evaporated fuel treatment apparatus includes a partition wall for dividing the inside of a canister into a first region located close to a purge passage and a fuel tank and a second region located close to an atmosphere passage, an electromagnetic valve provided in the partition wall and configured to open and close between the first and second regions, a small hole provided in the partition wall to release the pressure between the first and second regions, and a determination unit for performing a leak determination of the apparatus and a failure determination of a purge valve and the electromagnetic valve based on behaviors of the internal pressure of the canister according to opening and closing operations of the electromagnetic valve. 1. An evaporated fuel treatment apparatus comprising:a canister connected to a fuel tank and provided with a plurality of adsorption layers for adsorbing evaporated fuel generated in the fuel tank;a purge passage configured to allow purge gas containing the evaporated fuel to flow from the canister to an engine;a purge valve configured to open and close the purge passage;an atmosphere passage configured to take atmospheric air into the canister;a controller configured to perform purge control by placing the purge valve in an open state to introduce the purge gas from the canister into the engine through the purge passage;a partition wall dividing an inside of the canister into a first region located close to the purge passage and the fuel tank and a second region located close to the atmosphere passage;an electromagnetic valve provided in the partition wall and configured to open and close between the first region and the second region;a relief part provided in the partition wall and configured to release pressure between the first region and the second region; anda determination unit configured to perform a leak determination of the apparatus and a failure determination of the purge valve and the electromagnetic valve based on ...

EVAPORATED FUEL PROCESSING DEVICE

An evaporated fuel processing device configured to supply purge gas into an intake passage through which air to be suctioned into an engine passes. The evaporated fuel processing device may include a canister in which the purge gas including evaporated fuel is generated; a purge pump configured to discharge the purge gas toward the intake passage from the canister; a measurement unit configured to measure a temperature of the purge gas discharged from the purge pump; an estimation unit configured to estimate a temperature of the purge gas to be discharged from the purge pump based on an index other than the temperature measured by the measurement unit; and a controller. The controller may be configured to compare the measured temperature measured by the measurement unit with a reference temperature that is higher by a predetermined degree than the temperature estimated by the estimation unit. 1. An evaporated fuel processing device configured to supply purge gas into an intake passage through which air to be suctioned into an engine passes , the evaporated fuel processing device comprising:a canister in which the purge gas including evaporated fuel is generated;a purge pump configured to discharge the purge gas toward the intake passage from the canister;a measurement unit configured to measure a temperature of the purge gas discharged from the purge pump;an estimation unit configured to estimate a temperature of the purge gas to be discharged from the purge pump based on an index other than the measured temperature measured by the measurement unit; anda controller,whereinthe controller is configured to compare the measured temperature measured by the measurement unit with a reference temperature that is higher by a predetermined degree than the estimated temperature estimated by the estimation unit.2. The evaporated fuel processing device according to claim 1 , further comprising a notification unit claim 1 , whereinwhen the measured temperature is higher than or ...

Device for Mounting a Canister

A device for mounting a canister includes an externally threaded element, a rod element, a canister, and an internally threaded element screwed. The externally threaded element is located on a vehicle body member. The rod element is also located on the vehicle body member and extends parallel to the externally threaded element. The canister includes a casing. The casing includes a mounting portion and a retaining portion. The mounting portion defines an insertion hole configured to allow the externally threaded element to be inserted thereinto. The retaining portion includes a retention area. The retaining portion is configured to hold onto the rod element when the rod element has been inserted through the retention area. The internally threaded element is screwed on the externally threaded element after the externally threaded element has been inserted through the insertion hole. 1. A canister mounting device , comprising:an externally threaded element on a vehicle body member;a rod element on the vehicle body member extending substantially parallel to the externally threaded element; a mounting portion, wherein the mounting portion defines an insertion hole through which the externally threaded element is inserted; and', 'a retaining portion, wherein the retaining portion has an retention area, and the retaining portion holds onto the rod element inserted through the retention area; and, 'a canister comprising a casing, the casing comprisingan internally threaded element screwed on the externally threaded element that is inserted through the insertion hole.2. The device according to claim 1 , wherein:the rod element comprises a threaded shaft; andthe retaining portion comprises a first locking tab, wherein the first locking tab is locked by the threaded shaft.3. The device according to claim 2 , wherein the first locking tab comprises a gradually thinning claw edge.4. The device according to claim 2 , wherein the retaining portion further comprises a second ...

SYSTEMS AND METHODS FOR A TWO-VALVE NON-INTEGRATED REFUELING CANISTER ONLY SYSTEM

A system for a vehicle, comprising: a tank pressure control valve coupled in a first conduit between a fuel tank and a fuel vapor canister; a refueling valve coupled in a second, different, conduit between the fuel tank and the fuel vapor canister, the second conduit in parallel to the first conduit. In this way, two smaller, less complex valves may be utilized to control fuel tank vapor purging and fuel tank depressurization during refueling. This in turn may lower system cost and increase system functionality. 1. A system for a vehicle , comprising:a tank pressure control valve coupled in a first conduit between a fuel tank and a fuel vapor canister;a refueling valve coupled in a second, different, conduit between the fuel tank and the fuel vapor canister, the second conduit in parallel to the first conduit.2. The system of claim 1 , where the vehicle does not include a fuel tank isolation valve positioned between the fuel tank and the fuel vapor canister claim 1 , the fuel tank isolation valve configured to isolate the fuel tank from the fuel vapor canister when closed.3. The system of claim 1 , where the tank pressure control valve has a smaller orifice diameter than an orifice diameter of the refueling valve.4. The system of claim 1 , where the tank pressure control valve and refueling valve are solenoid valves.5. The system of claim 4 , where the tank pressure control valve includes an armature having a smaller volume than an armature of the refueling valve.6. The system of claim 1 , further comprising a tank pressure control buffer canister coupled in a purge conduit between the fuel vapor canister and a canister purge valve.7. The system of claim 1 , further comprising a refueling lock.8. A method for a hybrid-electric vehicle claim 1 , comprising: opening a tank pressure control valve while maintaining a refueling valve closed;', 'allowing a fuel tank pressure to decrease below a first threshold; and', 'opening the refueling valve., 'in response to a ...

FUEL APPARATUS FOR VEHICLE

A fuel apparatus includes a vapor passage for guiding evaporation gas in a fuel tank to a canister, a sealing valve for closing the vapor passage in normal condition to keep the interior of the fuel tank in a sealed state, a leak detection portion for detecting leak of the evaporation gas from the closed space of the fuel tank in the sealed state to outside, and an opening control portion for opening the sealing valve when leak of the evaporation gas from within the fuel tank is detected. Alternatively, the fuel apparatus includes a bypass passage connecting an upstream portion of the vapor passage located upstream of the sealing valve and a downstream portion of the vapor passage located downstream of the sealing valve to each other to bypass the sealing valve, and a bypass valve provided in the bypass passage, for opening the bypass passage in the closed state when leak of the evaporation gas from within the fuel tank is detected. 1. A fuel apparatus for a vehicle , comprising:a fuel tank storing fuel;a canister capable of adsorbing evaporation gas of the fuel produced in an interior of the fuel tank;a vapor passage connecting the interior of the fuel tank and the canister to each other to guide the evaporation gas in the fuel tank to the canister;a sealing valve provided in the vapor passage and, in normal condition, closing the vapor passage to keep the interior of the fuel tank in a sealed state;a leak detection portion which detects leak of the evaporation gas from a closed space of the fuel tank in the sealed state to outside; andan opening control portion which opens the sealing valve when leak of the evaporation gas from within the fuel tank is detected by the leak detection portion.2. The fuel apparatus according to claim 1 , wherein:the opening control portion includesa valve member capable of opening and closing the vapor passage,an electromagnetic on-off valve including a solenoid which moves the valve member to an open position to open the vapor ...

VAPORIZED FUEL TREATMENT DEVICE AND LEARNING METHOD OF VALVE OPENING START POSITION OF SEALING VALVE IN VAPORIZED FUEL TREATMENT DEVICE

A vaporized fuel treatment device includes a sealing valve disposed in a vapor passage between a fuel tank and a canister and is configured to include a valve element moves forward and backward in an axial direction to a valve seat, a cut-off valve configured to cut off a communication between the canister and an atmosphere, a tank internal pressure sensor detects an internal pressure of the fuel tank, and a canister internal pressure sensor that detects an internal pressure of the canister, a controller programmed to change an axial distance between the valve element and the valve seat in a state where the cut-off valve cuts off the communication between the canister and the atmosphere and to learn a valve opening start position of the sealing valve based on changes in the internal pressures of the fuel tank and the canister depending on a change in the axial distance. 1. A vaporized fuel treatment device configured to include a sealing valve that is disposed in a vapor passage between a fuel tank and a canister and is configured to include a valve element that moves forward and backward in an axial direction with respect to a valve seat , a cut-off valve configured to cut off a communication between the canister and an atmosphere , a tank internal pressure sensor that detects an internal pressure of the fuel tank , and a canister internal pressure sensor that detects an internal pressure of the canister , the vaporized fuel treatment device comprising:a controller that controls the sealing valve and the cut-off valve, the controller programmed to change an axial distance between the valve element and the valve seat in a state where the cut-off valve cuts off the communication between the canister and the atmosphere, the controller programmed to learn a valve opening start position of the sealing valve based on changes in the internal pressures of the fuel tank and the canister depending on a change in the axial distance.2. The vaporized fuel treatment device ...

DEVICE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE

An engine control device includes processing circuitry configured to perform a base injection amount calculation process, a feedback process for correcting a base injection amount based on an output value of an integral element obtained using a difference of detection and target values of an air-fuel ratio as an input value, an injection valve operation process for operating a fuel injection valve based on the corrected base injection amount, a purge control process for operating an adjustment device to control a fluid flow rate from a canister to an intake passage, and a correction limiting process for limiting the output value of the integral element so that a decreasing correction rate of the base injection amount has a decreasing tendency when a charged air amount is decreased if the fluid flow rate is larger than zero. 1. A control device for an internal combustion engine , wherein the internal combustion engine includes a fuel injection valve , a canister configured to collect fuel vapor generated in a fuel tank storing fuel supplied to the fuel injection valve , and an adjustment device configured to adjust a flow rate of fluid flowing from the canister to an intake passage , the control device comprising processing circuitry configured to perform:a base injection amount calculation process for calculating a base injection amount based on a charged air amount in a combustion chamber of the internal combustion engine;a feedback process for correcting the base injection amount based on an output value of an integral element obtained by using a difference between a detection value of an air-fuel ratio and a target value of the air-fuel ratio as an input value to adjust the detection value to the target value through feedback control;an injection valve operation process for operating the fuel injection valve based on the base injection amount corrected by the feedback process;a purge control process for operating the adjustment device to control the flow rate of ...

METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE

The internal combustion engine includes at least one cylinder, an exhaust gas tract having a measuring device, and a tank ventilation system having a purge air line, which provides pneumatic communication between the tank ventilation system and the cylinder. The purge air line has a sensor for ascertaining a hydrocarbon content of a gas flow from the tank ventilation system to the at least one cylinder. Fuel metering into the cylinder is controlled dependent on the ascertained hydrocarbon content. An exhaust gas characteristic of an exhaust gas flow that flows in the exhaust gas tract is detected by the measuring device and compared with a specified target value. If the ascertained difference between the detected exhaust gas characteristic and the specified target value exceeds a specified threshold, a test is carried out to determine whether the sensor has a malfunction. 15.-. (canceled)6. A method for operating an internal combustion engine having at least one cylinder , an exhaust gas train having a measuring device , a tank ventilation system having a purge air line configured to provide pneumatic communication between the tank ventilation system and the at least one cylinder , and at least one sensor for ascertaining a hydrocarbon content of a gas flow , the method comprising:ascertaining a hydrocarbon content of a gas flow flowing from the tank ventilation system to the at least one cylinder based at least in part on a measurement signal of the at least one sensor;controlling metering of fuel into the at least one cylinder based at least in part on the ascertained hydrocarbon content;detecting an exhaust gas characteristic variable of an exhaust gas flow that flows in the exhaust gas train by the measuring device;comparing the exhaust gas characteristic variable with a predefined setpoint value; andchecking whether the at least one sensor has a malfunction when an ascertained absolute difference between the detected exhaust gas characteristic variable and the ...

METHODS AND SYSTEMS FOR FUEL VAPOR METERING VIA VOLTAGE-DEPENDENT SOLENOID VALVE ON DURATION COMPENSATION

Methods and systems are provided for compensating a pulse width of a signal applied to a solenoid purge valve based on an input voltage, and delays in opening and/or closing the solenoid valve. 1. A method for an engine comprising:during fuel vapor purging, applying a signal to an electronically controllable solenoid valve coupling a fuel vapor canister and an intake manifold of the engine in synchronization with a crankshaft position;a pulse width of the signal based on an offset duration determined based on an instantaneous system voltage, an opening response time of the solenoid valve and a closing response time of the solenoid valve.2. The method of claim 1 , wherein the pulse width is further based on a solenoid effective ON duration determined based on a desired purge volume and a purge flow rate.3. The method of claim 2 , wherein the opening response time is a duration for the solenoid valve to move from a closed position to an open position claim 2 , and the closing response time is a duration for the solenoid valve to move from the open position to the closed position.4. The method of claim 3 , further comprising claim 3 , when an absolute value of a difference between the opening response time and the closing response time is greater than a threshold difference claim 3 , if the opening response time is greater than the closing response time claim 3 , adding the offset duration to the effective ON duration.5. The method of claim 4 , further comprising claim 4 , when the absolute value of the difference between the opening response time and the closing response time is greater than a threshold difference claim 4 , if the opening response time is less than the closing response time claim 4 , subtracting the offset duration from the effective ON duration.6. The method of claim 5 , further comprising claim 5 , when the absolute value of the difference between the opening response time and the closing response time is less than a threshold difference claim 5 , ...

DIAGNOSTIC APPARATUS FOR EVAPORATIVE FUEL PROCESSING SYSTEM

A diagnostic apparatus for an evaporative fuel processing system includes a fuel tank retaining fuel to be fed to a pressure-charger-equipped engine, a canister communicating with the fuel tank and adsorbing evaporative fuel generated therein, an upstream purge line allowing the canister and an engine intake system to communicate at an upstream side of the pressure charger, an upstream purge valve that opens and closes the upstream purge line, a pressure detector detecting pressure in the upstream purge line; a valve controller that opens and closes the upstream purge valve during pressure-charging and non-pressure-charging, respectively, a first timekeeper measuring an accumulative time in which a diagnosis execution condition is satisfied after a purge-flow diagnosis is started, and a determiner determining that the system operates normally or abnormally depending on whether the pressure decreases or not by a predetermined pressure or more from the start of the diagnosis. 1. A diagnostic apparatus for an evaporative fuel processing system , the apparatus comprising:a fuel tank configured to retain fuel to be fed to an engine equipped with a pressure charger;a canister configured to communicate with the fuel tank and capable of adsorbing evaporative fuel generated in the fuel tank;an upstream purge line configured to allow the canister and an intake system of the engine to communicate with each other at an upstream side of the pressure charger;an upstream purge valve disposed in the upstream purge line and configured to open and close the upstream purge line;a pressure detector configured to detect pressure in the upstream purge line;a valve controller configured to open the upstream purge valve when pressure-charging is performed by the pressure charger and to close the upstream purge valve during non-pressure-charging;a first timekeeper configured to accumulatively measure a time in which a diagnosis execution condition, including an amount of air taken into the ...

ACTIVATED CARBON MOLDED ARTICLE

To provide an activated carbon molded article which can satisfactorily adsorb an evaporated fuel emitted from an automobile and can achieve low evaporated fuel emission performance during the long-time parking of an automobile. 1. An activated carbon molded article having a specific surface area per volume , which is calculated from a specific surface area determined by the BET multipoint method and a packing density determined in accordance with JIS K 1474 , of 290 to 520 m/mL , and also having an outer surface area per volume of 1.4 m/L or more.2. The activated carbon molded article according to claim 1 , wherein the activated carbon molded article has a pillar structure claim 1 , andthe pillar structure comprises:a pillar peripheral wall having, in an inside thereof, a hollow part opening at both ends in a pillar axis direction; andone or more partition walls which extend from one of openings of the hollow part to the other of the openings and divide the hollow part into two or more compartments.3. The activated carbon molded article according to claim 2 , wherein the one or more partition walls are connected to the pillar peripheral wall and are not connected to each other.4. The activated carbon molded article according to claim 2 , wherein claim 2 , when a pillar cross section that is orthogonal to the pillar axis is observed claim 2 , the number of the one or more partition walls is one claim 2 , two or three claim 2 , andeach of the one or more partition walls is connected, at both ends thereof, to the pillar peripheral wall.5. The activated carbon molded article according to claim 2 , wherein claim 2 , when a pillar cross section that is orthogonal to the pillar axis is observed claim 2 , at least two of the partition walls are connected to each other at a position other than the gravity center of the pillar cross section.6. The activated carbon molded article according to claim 2 , wherein claim 2 , when a pillar cross section that is orthogonal to the ...

SYSTEMS AND METHODS FOR EVAPORATIVE EMISSIONS TESTING

Methods and systems are provided for diagnosing degradation of an evaporative emissions system in a vehicle. One example method comprises following a vehicle-off event, waking an electronic controller to indicate an absence of a leak in the evaporative emissions system responsive to vacuum in the evaporative emissions system attaining a vacuum threshold, the vacuum threshold based on ambient conditions and fuel conditions at the vehicle-off event. The vacuum threshold may vary based on existing conditions and may enable a more reliable diagnosis of a status of the evaporative emissions system. 1. A method , comprising:following a vehicle-off event, waking an electronic controller to indicate an absence of a vapor leak in an evaporative emissions system responsive to vacuum in the evaporative emissions system attaining a vacuum threshold, the vacuum threshold determined at the vehicle-off event by the electronic controller and the vacuum threshold based on ambient conditions and fuel conditions.2. The method of claim 1 , further comprising sealing the evaporative emissions system following the vehicle-off event and determining of the vacuum threshold.3. The method of claim 1 , wherein the electronic controller sleeps after determining the vacuum threshold.4. The method of claim 1 , further comprising enabling a sleep mode of the electronic controller after indicating the absence of the vapor leak.5. The method of claim 1 , wherein the ambient conditions include one or more of ambient temperature claim 1 , ambient pressure claim 1 , and ambient humidity claim 1 , and wherein fuel conditions include one or more of fuel level claim 1 , fuel volatility claim 1 , and fuel type.6. The method of claim 1 , further comprising maintaining a comparator circuit awake following the vehicle-off event.7. The method of claim 6 , wherein the comparator circuit yields a voltage based on a comparison of the vacuum threshold and an output of a pressure sensor.8. The method of claim 7 , ...

Hydrocarbon Trap Assembly with Thermoformed Hydrocarbon-Adsorbing Sleeve

A hydrocarbon trap assembly for use in an intake system of a motor vehicle engine includes a first duct having an interior recess adjacent an end thereof, the recess having a blind end; a second duct overlapping the first duct's end and closing off a second end of the recess; and a thermoformed hydrocarbon-adsorbing sleeve inside the recess and having a first edge adjacent the blind end and a second edge adjacent the second end of the recess. One or both ends of the sleeve may engage a hook formed on the respective first and/or second ducts. The second end of the sleeve may have a flange that fits into a gap between the ducts. 1. A hydrocarbon trap assembly , comprising:a first duct having an interior recess adjacent an end thereof, the recess having a blind end;a second duct overlapping the end of the first duct and closing off a second end of the recess; anda thermoformed hydrocarbon-adsorbing sleeve inside the recess and having a first edge adjacent the blind end and a second edge adjacent the second end of the recess.2. The assembly according to wherein the sleeve further comprises a thermoformed stiffening feature.3. The assembly according to wherein the stiffening feature comprises a flange adjacent the second edge claim 2 , the flange fitting into a gap between ends of the duct.4. The assembly according to wherein overlapping portions of the first duct and the second duct adjacent to the gap are welded together.5. The assembly according to wherein the stiffening feature comprises a depression formed in at least one of an outer and inner surface of the sleeve.6. The assembly according to wherein the depression is formed in an outer surface and matingly engages a feature projecting from an inner surface of the first duct.7. The assembly according to wherein the feature projecting from the inner surface of the first duct is a clearance feature for an obstruction exterior to the first duct.8. The assembly according to wherein the stiffening feature protrudes from ...

FUEL TANK PRESSURE SENSOR RATIONALITY TEST FOR A PHEV

A method for verifying the reliable operation of a fuel tank pressure transducer positioned within a fuel tank of a PHEV. The method detects the initiation of a refueling cycle, which leads to opening a system vent valve positioned between a carbon canister and a system vent, and opening a fuel tank isolation valve. A controller monitors fuel system pressure within the fuel tank and at the vent valve, and that device determines rates of change of the fuel system pressure within the fuel tank and at the outlet vent. Reliable operation of the fuel tank pressure transducer is indicated upon a determination that the rates of change of the fuel system pressure in the fuel tank and at the outlet vent are uniform within a predetermined range. 1. A method for verifying the reliable operation of a fuel tank pressure transducer positioned within a fuel tank of a PHEV , comprising:detecting the initiation of a refueling cycle;opening a system vent valve positioned between a carbon canister and a system vent;opening a fuel tank isolation valve to depressurize the fuel system;monitoring fuel system pressure within the fuel tank and at the vent valve, the monitoring being performed by a controller;determining the rates of change of the fuel system pressure within the fuel tank and at the outlet vent;indicating reliable operation of the fuel tank pressure transducer upon a determination that fuel system pressure at the outlet vent rises to the level of fuel system pressure indicated in the fuel tank, and that the rates of change of the fuel system pressure in the fuel tank and at the outlet vent are uniform within a predetermined range.2. The method of claim 1 , further comprising claim 1 , concluding that the fuel tank isolation valve is stuck closed where the fuel system pressure at the outlet vent does not change with time.3. The method of claim 1 , further comprising claim 1 , providing a pressure sensor in the vicinity of the fuel system outlet vent claim 1 , to monitor the ...