Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 2618. Отображено 100.
07-06-2012 дата публикации

Hydrocarbon Retaining System Configuration for Combustion Engine

Номер: US20120137659A1
Автор: James Michael Kerns, Jason Aaron Lupescu, Michael James Uhrich, Shane Elwart
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Systems, methods, and computer readable storage media are described in which exhaust gas is routed to a hydrocarbon retaining device during starting, and purged to the engine intake manifold. Various alternative approaches are described for controlling operation and diagnosing degradation. Further, various interrelated configurations are described.

Подробнее
Номер записи: 1
14-06-2012 дата публикации

Engine assembly including camshaft with multimode lobe

Номер: US20120145097A1
Автор: Alan W. Hayman, Robert S. McAlpine
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An engine assembly may include an engine structure, a first valve, a first valve lift mechanism and a first camshaft. The engine structure may define a first combustion chamber and a first port in communication with the first combustion chamber. The first valve may be located in the first port and the first valve lift mechanism may be engaged with the first valve. The first camshaft may be rotationally supported on the engine structure and may include a first double lobe engaged with the first valve lift mechanism. The first double lobe may define a first valve opening region including a first peak and a second valve opening region including a second peak rotationally offset from the first peak.

Подробнее
Номер записи: 2
16-05-2013 дата публикации

Methods and systems for engine starting

Номер: US20130124067A1
Автор: Alex O'Connor Gibson, Donald James Lewis, Gopichandra Surnilla, John D. Russell, Joseph N. Ulrey, Ross Pursifull
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions and selectively reactivated during engine restart conditions. One example method comprises, during an engine restart from an idle stop, performing a first combustion event in a cylinder with a piston at an engine crankshaft position that is after a crankshaft position at which said cylinder's exhaust valve opens, and before a crankshaft position at which the cylinder's intake valve closes, during a cycle of said cylinder. In this way, inaccuracies in cylinder aircharge estimation may be reduced, thereby also reducing air-fuel ratio errors and improving the quality and repeatability of engine restarts.

Подробнее
Номер записи: 3
23-05-2013 дата публикации

COMBUSTION MODE SWITCHING WITH A TURBOCHARGED/SUPERCHARGED ENGINE

Номер: US20130125544A1
Автор: JIANG LI, Mond Alan
Принадлежит: ROBERT BOSCH GMBH

A method for switching between low- and high-dilution combustion modes in an internal combustion engine having an intake passage with an exhaust-driven turbocharger, a crankshaft-driven positive displacement supercharger downstream of the turbocharger and having variable boost controllable with a supercharger bypass valve, and a throttle valve downstream of the supercharger. The current combustion mode and mass air flow are determined. A switch to the target combustion mode is commanded when an operating condition falls within a range of predetermined operating conditions. A target mass air flow to achieve a target air-fuel ratio corresponding to the current operating condition and the target combustion mode is determined. The degree of opening of the supercharger bypass valve and the throttle valve are controlled to achieve the target mass air flow. The amount of residual exhaust gas is manipulated. 1. A method for switching from a current combustion mode , which is either of a low-dilution combustion mode and a high-dilution combustion mode , to a target combustion mode , which is the other of the low-dilution and high-dilution combustion modes in an internal combustion engine having an intake passage with an exhaust-driven turbocharger , a crankshaft-driven positive displacement supercharger downstream of the turbocharger and having variable boost output controllable with a supercharger bypass valve , and a throttle valve downstream of the supercharger , the method comprising:determining the current combustion mode;determining current mass air flow;commanding a combustion mode switch to the target combustion mode when a current operating condition falls within a range of predetermined operating conditions;determining a target mass air flow amount to achieve a target air-fuel ratio corresponding to the current operating condition and the target combustion mode;controlling the degree of opening of both the supercharger bypass valve and the throttle valve to achieve ...

Подробнее
Номер записи: 4
06-06-2013 дата публикации

Method and system for pre-ignition control

Номер: US20130139786A1
Автор: Chris Paul Glugla, Paul Charles Mingo, Robert Sarow Baskins, Sue Kay Wagers
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for addressing pre-ignition that may be induced in response to actions taken to mitigate a cylinder misfire. An amount of engine load limiting applied may be adjusted to reduce the likelihood pre-ignition while also addressing component over-temperature issues. By limiting an engine load while shutting off fuel in a misfiring cylinder, and while combusting a lean air-fuel mixture in the remaining cylinders, pre-ignition induced by the misfire-mitigating lean combustion conditions can be reduced.

Подробнее
Номер записи: 5
18-07-2013 дата публикации

Method and Control Unit for Controlling an Internal Combustion Engine

Номер: US20130180506A1
Автор: Harry Schüle, Markus Stutika
Принадлежит: Continental Automotive GmbH

A method and a control unit are disclosed for controlling a single-cylinder or multiple-cylinder internal combustion engine having at least one fuel injector per cylinder, at least one camshaft for actuating inlet valves and/or outlet valves, and having a control unit which controls the fuel injectors in such a way that they inject in each case one fuel pre-injection per cylinder during a starting phase of the internal combustion engine. In order to make an improved pre-injection strategy possible during the starting phase, according to the invention at least one cylinder pressure signal which is supplied by a cylinder pressure sensor for measuring the pressure in a cylinder is evaluated with regard to interference signals, and the evaluation result is taken into consideration at least during the starting phase in a determination of the camshaft angle.

Подробнее
Номер записи: 6
30-01-2014 дата публикации

Variable valve timing for egr control

Номер: US20140026872A1
Автор: Adam Nathan Banker, James Michael Kerns, Michael James Uhrich, Stephen B. Smith
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits.

Подробнее
Номер записи: 7
06-03-2014 дата публикации

Spark-ignition direct injection engine

Номер: US20140060489A1
Автор: Kazuhiro Nagatsu, Kouhei Iwai, Masahisa Yamakawa, Takashi YOUSO
Принадлежит: Mazda Motor Corp

A spark-ignition direct injection engine is provided. The engine includes an engine body, a fuel injection valve, a fuel pressure setting mechanism, an ignition plug, and a controller. The controller operates the engine to perform compression-ignition combustion within a first operating range, and controls the ignition plug to operate the engine to perform spark-ignition combustion within a second operating range. Within a specific part of the first range, the controller sets the fuel pressure to 30 MPa or above, and retards the compression ignition to after a compression top dead center by controlling the injection valve to inject fuel into a cylinder in a period from a late stage of compression stroke to an early stage of expansion stroke. Below the specific part, the controller controls the fuel injection valve to inject the fuel into the cylinder in a period from intake stroke to a mid-stage of the compression stroke.

Подробнее
Номер записи: 8
13-03-2014 дата публикации

Catalyst heating with exhaust back-pressure

Номер: US20140069080A1
Автор: Peter C. Moilanen, Thomas G. Leone
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, and adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR). In this way, combustion stability may be maintained while the exhaust back-pressure valve is closed.

Подробнее
Номер записи: 9
03-04-2014 дата публикации

Method and Device for Controlling a Variable Valve Train of an Internal Combustion Engine

Номер: US20140090614A1
Автор: Gerhard Eser, Simon MESSAGE, Steffer Gessner, Torsten GEISS
Принадлежит: Continental Automotive GmbH

A method is disclosed for controlling a variable valve timing mechanism of an internal combustion engine having a plurality of cylinders, wherein, at a first operating point of the internal combustion engine, the fuel quantity which is fed in in each case is reduced successively for each cylinder until a predetermined unsmooth-running limiting value is reached. The variable valve timing mechanism is controlled with consideration of the cylinder-individual values for the fuel-quantity reduction at the first operating point.

Подробнее
Номер записи: 10
10-04-2014 дата публикации

Approach for controlling exhaust gas recirculation

Номер: US20140100760A1
Автор: Brad Alan VanDerWege, Jianwen James Yi, Shiyou Yang, Steven Wooldridge, Thomas A. McCarthy
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Various embodiments related to controlling EGR in an engine are disclosed. In one embodiment, a first EGR amount is supplied to a cylinder at a first temperature and a first engine speed and load. Further, at the first engine speed and load, as engine temperature increases from the first temperature to a second temperature, a first fuel amount is injected after exhaust valve closing and before intake valve opening while a second EGR amount is supplied to the cylinder that is greater than the first EGR amount.

Подробнее
Номер записи: 11
05-01-2017 дата публикации

VALVE TRAIN ASSEMBLY

Номер: US20170002698A1
Автор: Cecur Majo
Принадлежит:

A valve train assembly includes a rocker arm, comprising: a first roller, configured to engage a first rotatable cam surface; and a further roller, configured to engage a further rotatable cam surface, wherein at least part of the rocker arm can be pivoted by at least the first rotatable cam surface to move a valve to cause a first valve event, and wherein at least part of the rocker arm can be pivoted by the further rotatable cam surface to move the valve to cause a second valve event. 1. A valve train assembly comprising:a rocker arm comprising:a first body supporting a first axle on which is mounted a first roller configured to engage a first rotatable cam surface, wherein at least part of the rocker arm can be pivoted by at least the first rotatable cam surface to move a valve to cause a first valve event;a second body supporting a second axle on which is mounted a further roller configured to engage a further rotatable cam surface, wherein at least part of the rocker arm can be pivoted by the further rotatable cam surface to move the valve to cause a second valve event, wherein one of the first and second bodies is pivotally mounted with respect to the other of the first and second bodies;wherein the rocker arm is configurable in a first mode of operation in which one of the first and second valve events occurs and a second mode of operation in which both the first and second valve events occur or the other of the first and second valve events occurs;wherein the rocker arm further comprises a latch configured to latch and unlatch the first and second bodies together and wherein which of the first and second modes the rocker arm is configured in depends upon whether the first and second bodies are latched or are unlatched;wherein the latch comprises a latch member moveable between a latched position whereby the latch member latches the first and second bodies together and an unlatched position in which the first and second bodies are unlatched; andwherein the ...

Подробнее
Номер записи: 12
05-01-2017 дата публикации

Park Positions for Variable Camshaft Phasing Systems and Methods

Номер: US20170002751A1
Автор: Stewart Etsuko Muraji, TATAVARTHI RAMAKRISHNA, York Gregory J., Yurgil James R.
Принадлежит:

An engine control system for a vehicle includes a shutdown control module that generates a command to shut down an engine of the vehicle when at least one of: a driver requests the shutdown of the engine via an ignition system; and when one or more predetermined conditions are satisfied for shutting down the engine without the driver requesting shutdown of the engine via the ignition system. A valve control module, when the command to shut down the engine is generated, advances an exhaust camshaft phaser based on a predetermined exhaust park position. When the exhaust camshaft phaser is in the predetermined exhaust park position, an exhaust valve of a cylinder is fully closed during an exhaust stroke of the cylinder before a piston of the cylinder reaches a topmost position for a next intake stroke of the cylinder. 1. An engine control system for a vehicle , comprising: a driver requests the shutdown of the engine via an ignition system; and', 'when one or more predetermined conditions are satisfied for shutting down the engine without the driver requesting shutdown of the engine via the ignition system; and, 'a shutdown control module that generates a command to shut down an engine of the vehicle when at least one ofa valve control module that, when the command to shut down the engine is generated, advances an exhaust camshaft phaser based on a predetermined exhaust park position,wherein when the exhaust camshaft phaser is in the predetermined exhaust park position, an exhaust valve of a cylinder is fully closed during an exhaust stroke of the cylinder before a piston of the cylinder reaches a topmost position for a next intake stroke of the cylinder.2. The engine control system of further comprising a park pin that extends into an aperture in the camshaft phaser when the exhaust camshaft phaser is in the predetermined exhaust park position and that claim 1 , when extended into the aperture claim 1 , prevents advancement or retardation of the exhaust camshaft ...

Подробнее
Номер записи: 13
04-01-2018 дата публикации

CONTINUOUSLY VARIABLE VALVE DURATION SYSTEM AND OPERATING METHOD THEREOF

Номер: US20180003113A1
Автор: Baek Jin Wook, Kim Lae Kyeom
Принадлежит:

A continuously variable valve duration (CVVD) system includes an electronic control unit (ECU) configured to output a command for adjusting an actuator and a controller configured to determine a operation range of a control shaft of the actuator and adjust the control shaft in the determined operation range based on the command of the ECU. The controller positions the control shaft at a predetermined target phase and determines a control state of each target phase based on a target phase value transmitted from the actuator when the control shaft is positioned at the target phase. 1. A continuously variable valve duration (CVVD) system configured to operate a CVVD by adjusting an actuator configured to control the CVVD comprising:an electronic control unit (ECU) configured to output a command for adjusting the actuator; anda controller configured to determine a operation range of a control shaft of the actuator and adjust the control shaft in the operation range based on the command of the ECU, whereinthe controller is configured to position the control shaft at a predetermined target phase and determines a control state of each target phase on the basis of a target phase value transmitted by the actuator when the control shaft is positioned at the target phase.2. The CVVD system of claim 1 , wherein the actuator comprises:a first stopper disposed at a first position to restrict movement of the control shaft in a first direction;a second stopper disposed at a second position to restrict movement of the control shaft in a second direction; anda sensor configured to output a value corresponding to a phase at which the control shaft is positioned to the controller.3. The CVVD system of claim 2 , wherein the sensor outputs a first restricted phase value claim 2 , which corresponds to a phase of the control shaft when the movement thereof is restricted by the first stopper claim 2 , and a second restricted phase value claim 2 , which corresponds to a phase of the control ...

Подробнее
Номер записи: 14
07-01-2021 дата публикации

A METHOD FOR ESTIMATING CYLINDER PRESSURE

Номер: US20210003082A1
Автор: Carlson David, LUNDGREN Staffan
Принадлежит: VOLVO TRUCK CORPORATION

The invention relates to a method () for estimating a cylinder pressure (CP) in an internal combustion engine arrangement (), the method comprising the steps of: initiating () an opening of a valve by an actuator during an expansion stroke; monitoring () the valve to determine a point in time (Tp) when the valve opens; determining () a differential pressure (DP) between the combustion cylinder and a position in a fluid medium exhaust passage () downstream said valve at the point in time (Tp); receiving () data being indicative of a pressure (EP) in the fluid medium passage at the point in time (Tp); and determining () the cylinder pressure (CP) at the point in time (Tp) based on the determined differential pressure (DP) and the data indicative of the pressure in said fluid medium passage. 1. A method for estimating a cylinder pressure (CP) in an internal combustion engine arrangement , said internal combustion engine arrangement comprising an internal combustion engine having a combustion cylinder and a reciprocating piston movable within said combustion cylinder between a bottom dead center (BDC) and a top dead center (TDC) , and further a flow control valve assembly adapted to regulate the flow of a fluid medium passing through the flow control valve in fluid communication with the combustion cylinder and comprising a valve operable between an open position and a closed position and an actuator operable to provide an opening force for opening the valve ,characterized by the method comprising the steps of:initiating an opening of said valve by said actuator during an expansion stroke;monitoring said valve to determine a point in time (Tp) when said valve opens;determining a differential pressure (DP) between a gas pressure level of the fluid medium in said combustion cylinder and a pressure level of the combustion gas in a fluid medium passage downstream said valve at said point in time (Tp);receiving data being indicative of a pressure (EP) in said fluid medium ...

Подробнее
Номер записи: 15
07-01-2021 дата публикации

Adaptive any-fuel camless reciprocating engine

Номер: US20210003087A1
Автор: Peter Sinsheimer, Raymond Mitchell Spearrin, Tsu-Chin Tsao
Принадлежит: UNIVERSITY OF CALIFORNIA

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine.

Подробнее
Номер записи: 16
03-01-2019 дата публикации

SYSTEMS AND METHODS FOR A SPLIT EXHAUST ENGINE SYSTEM

Номер: US20190003412A1
Автор: Surnilla Gopichandra, Ulrey Joseph Norman
Принадлежит:

Methods and systems are provided for operating a split exhaust engine system that provides blowthrough air and exhaust gas recirculation to an intake passage via a first exhaust manifold and exhaust gas to an exhaust passage via a second exhaust manifold. In one example, an amount of opening overlap between a plurality of intake valves and a first set of exhaust valves coupled to the first exhaust manifold may be adjusted responsive to a transition from an estimated combustion air-fuel content to a leaner air-fuel content of the blowthrough air on a cylinder to cylinder basis. As one example, the transition may be determined from an output of an oxygen sensor positioned within the first exhaust manifold or an exhaust runner of each of the first set of exhaust valves. 1. A method , comprising:flowing boosted blowthrough air from a plurality of intake valves to a first exhaust manifold coupled to an intake passage via a first set of exhaust valves;flowing combusted gases to an exhaust passage via a second set of exhaust valves; andadjusting an amount of opening overlap between the plurality of intake valves and the first set of exhaust valves responsive to a measured oxygen content in the first exhaust manifold and a desired exhaust gas recirculation (EGR) flow rate of combusted gases from the first set of exhaust valves to the intake passage.2. The method of claim 1 , wherein each cylinder includes one exhaust valve of the first set of exhaust valves claim 1 , one exhaust valve of the second set of exhaust valves claim 1 , and one intake valve of the plurality of intake valves and wherein each exhaust valve of the first set of exhaust valves opens at a different time in an engine cycle.3. The method of claim 2 , wherein the measured oxygen content is obtained from an oxygen sensor positioned in the first exhaust manifold while the one exhaust valve of the first set of exhaust valves for a corresponding cylinder is open.4. The method of claim 2 , wherein the measured ...

Подробнее
Номер записи: 17
14-01-2016 дата публикации

SELECTIVELY DEACTIVATABLE ENGINE CYLINDER

Номер: US20160010568A1
Автор: Haynes Neil, Whiston Phil John
Принадлежит:

An engine comprising: one or more multi-valve cylinders, each multi-valve cylinder having a plurality of intake valves and/or a plurality of exhaust valves; and one or more further cylinders, each further cylinder having fewer intake valves and/or fewer exhaust valves than each multi-valve cylinder, wherein a cylinder deactivation system of the engine is configured to selectively deactivate at least one further cylinder. 1. An engine comprising:one or more multi-valve cylinders each having a plurality of intake valves and/or a plurality of exhaust valves; andone or more further cylinders each having fewer intake valves and/or fewer exhaust valves than each multi-valve cylinder, wherein a cylinder deactivation system of the engine is configured to selectively deactivate at least one of each further cylinder.2. The engine according to claim 1 , wherein a valve lift height of at least one intake valve and/or at least one exhaust valve of at least one of each further cylinder is greater than that of the plurality of intake valves and/or the plurality of exhaust valves of the one or more multi-valve cylinders.3. The engine according to claim 1 , wherein at least one intake valve and/or at least one exhaust valve of the or at least one of each further cylinder is larger than the plurality of intake valves and/or the plurality of exhaust valves of the one or more multi-valve cylinders.4. The engine according to claim 1 , wherein the cylinder deactivation system is configured to selectively deactivate at least one of the one or more multi-valve cylinders.5. The engine according to claim 1 , wherein the cylinder deactivation system comprises one or more switchable roller finger followers or one or more collapsible lash adjusters.6. The engine according to claim 1 , wherein each multi-valve cylinder comprises two intake valves.7. The engine according to claim 1 , wherein each multi-valve cylinder comprises two exhaust valves.8. The engine according to claim 1 , wherein each ...

Подробнее
Номер записи: 18
10-01-2019 дата публикации

CAM-SWITCHING DEVICE AND METHOD OF CONTROLLING CAM-SWITCHING DEVICE

Номер: US20190010839A1
Автор: TSUNODA Hiroshi
Принадлежит: Isuzu Motors Limited

A cam-switching device switches between first and second cams provided so as to correspond to intake exhaust valves of an engine. In a case of switching from the first cam to the second cam, a cylinder resting unit stops the opening and closing operations of the intake and exhaust valves in the same combustion cycle, and a cam shaft moving unit starts sliding the cam shaft in a first cam angle range. In a case of switching from the second cam to the first cam, the cylinder resting unit stops the opening and closing operations of the intake and exhaust valves in the same combustion cycle, and the cam shaft moving unit starts sliding the cam shaft in a second cam angle range. 1. A cam-switching device that selectively switches between a first cam and a second cam to make valve characteristics of intake and exhaust valves of an engine variable ,the first cam and the second cam being provided corresponding to each of the intake and exhaust valves and having different cam profiles,each of the cam profiles being determined such that a first cam angle range where a valve lift amount of the first cam is greater than a valve lift amount of the second cam and a second cam angle range where a valve lift amount of the second cam is greater than a valve lift amount of the first cam are formed, andthe cam-switching device comprising:a cam shaft configured to rotate in conjunction with a crank shaft of the engine and provided such that the first cam and the second cam are rotatable together;a cam shaft moving unit configured to slide the cam shaft in an axis direction to selectively switch between the first cam and the second cam;a cylinder resting unit configured to stop opening and closing operations of the intake and exhaust valves to make a cylinder restable; anda cam shaft moving control unit configured to control the cylinder resting unit to stop the opening and closing operations of the intake and exhaust valves in the same combustion cycle and control the cam shaft moving ...

Подробнее
Номер записи: 19
14-01-2021 дата публикации

METHOD OF TWO-STEP VVL LIFT MALFUNCTION AVOIDANCE LEARNING CONTROL AND ELECTRIC TWO-STEP VVL SYSTEM THEREOF

Номер: US20210010431A1
Автор: SONG Jae-Hyeok
Принадлежит:

A method of two-step variable valve lift (VVL) malfunction avoidance learning control may include: in a two-step VVL system which is operated with a main lift and a secondary lift, verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower ; performing VVL operation learning, in which a failure of occurrence of the second lift is determined on the basis of a locking failure of the cam follower due to an initially set value of the operation avoidance area; and reflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning. 1. A method of two-step variable valve lift (VVL) malfunction avoidance learning control , the method comprising:providing a two-step VVL system operated with a main lift and a secondary lift;verifying, by an electronic control unit (ECU), an operation avoidance area based on locking of a lock pin of a cam follower;performing VVL operation learning, in which a failure of occurrence of the second lift is determined based on a locking failure of the cam follower due to an initially set value of the operation avoidance area; andreflecting the operation avoidance area to the two-step VVL system with a corrected set value which is obtained through the VVL operation learning.2. The method of claim 1 , wherein the initially set value and the corrected set value are response times claim 1 , and each of the response times is an elapsed time from a VVL operation signal to the occurrence of the secondary lift.3. The method of claim 1 , wherein the operation avoidance area is represented by an operation avoidance area curve in which a cam angle is matched to an engine speed.4. The method of claim 1 , wherein: the reflecting operation avoidance area to the two-step VVL system is implemented by a system application control claim 1 , and a VVL operation learning execution control of determining a vehicle condition ...

Подробнее
Номер записи: 20
17-04-2014 дата публикации

Condensate accumulation model for an engine heat exchanger

Номер: US20140102428A1
Автор: Brien Lloyd Fulton, Daniel Joseph Styles
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Embodiments for controlling condensate in an engine heat exchanger are disclosed. In one example, a method for an engine comprises increasing exhaust gas recirculation (EGR) flow responsive to condensation in an EGR cooler. In this way, condensate in the EGR cooler may be controlled via modulation of EGR flow.

Подробнее
Номер записи: 21
10-02-2022 дата публикации

METHODS AND SYSTEMS FOR HEATING AN AFTER TREATMENT DEVICE VIA AN INTERNAL COMBUSTION ENGINE

Номер: US20220042471A1
Автор: Van Nieuwstadt Michiel J.
Принадлежит:

Systems and methods for heating an exhaust after treatment device and producing smooth engine torque output are described. In one example, exhaust valve opening time is adjusted to compensate for additional torque that may be generated via combusting rich air-fuel mixtures in cylinders. In addition, intake valve lift may be adjusted to compensate for additional torque that may be generated via combusting rich air-fuel mixtures in cylinders. 1. An engine operating method , comprising:combusting rich air-fuel mixtures in a first group of cylinders and combusting lean air-fuel mixtures in a second group of cylinders via a controller in response to a request to heat an exhaust after treatment device; andadvancing exhaust valve opening time in the first group of cylinders and retarding exhaust valve closing timing in the second group of cylinders via the controller to equalize torque production between the first group of cylinders and the second group of cylinders.2. The method of claim 1 , where the exhaust valve opening timing in the first group of cylinders is advanced to reduce torque production of the first group of cylinders such that torque produced by the first group of cylinders combusting the rich air-fuel mixtures at a first engine speed and driver demand torque is equivalent torque produced by the first group of cylinders combusting stoichiometric air-fuel mixtures at the first engine speed and driver demand torque with nominal exhaust valve opening timing.3. The method of claim 1 , where the exhaust valve opening timing in the second group of cylinders is retarded to increase torque production of the second group of cylinders such that torque produced by the second group of cylinders combusting the lean air-fuel mixtures at a first engine speed and driver demand torque is equivalent torque produced by the second group of cylinders combusting stoichiometric air-fuel mixtures at the first engine speed and driver demand torque with nominal exhaust valve opening ...

Подробнее
Номер записи: 22
24-01-2019 дата публикации

Valve Train and Engine Assembly

Номер: US20190024593A1
Автор: SALLMANN Michael, SCHENK Martin, WABBALS Din
Принадлежит:

A valve train for an engine of a motor vehicle and an engine assembly with such a valve train is provided. The valve train includes at least two inlet and/or outlet valves, and at least two motorized actuating units configured to independently control the maximum valve lifts of respective ones of the valves. A first actuating unit of the at least two actuating units is associated with a first valve of the at least two valves, and a second actuating unit is associated with a second valve of the at least two valves. 1. A valve train for an engine , comprising:at least two valves, the at least two valves being at least one of inlet valves and outlet valves;at least two motorized adjustment units which are independent of each other, a first adjustment unit of the at least two motorized adjustment units is associated with a first valve of the at least two valves and a second adjustment unit of the at least two adjustment units is associated with a second valve of the at least two valves, and', 'the first and second adjustment units are configured to adjust maximum valve strokes of the first and second valves independently of each other., 'wherein'}2. The valve train as claimed in claim 1 , whereinthe first and second adjustment units are configured to adjust the maximum valve stroke of the respective first and second valves in a stepless manner.3. The valve train as claimed in claim 2 , whereinthe first and second adjustment units each include a motorized adjustment drive and at least one adjustment mechanism configured to change a position of the respective first and second valves with respect to respective valve seats.4. The valve train as claimed in claim 3 , whereinthe first and second adjustment mechanisms each include at least one adjustment shaft having at least one adjustment cam rotatable by the adjustment drive.5. The valve train as claimed in claim 4 , whereineach of the at least one adjustment cams is configured to engage a respective intermediate lever ...

Подробнее
Номер записи: 23
04-02-2016 дата публикации

Six Stroke Internal-Combustion Engine

Номер: US20160032821A1
Автор: Dahlstrom Karl Louis
Принадлежит: Americar Engine Company

A method for modification and improvement in internal combustion engine systems utilizing six strokes (1. an intake stroke, 2. a compression stroke, 3. a power stroke, 4. an exhaust stroke, 5. an intake-cooling stroke and 6. an exhaust-cooling stroke) and incorporating changes to the camshaft lobes and valve train timing providing for a 3:1 camshaft to crankshaft ratio allowing for higher revolutions per minute, lower idling speeds, reduced valve float and smoother operation. The system provides for more efficient fuel combustion during the power stroke, which extends past bottom dead center thus increasing power, fuel efficiency, and greatly reduces harmful emissions. The additional fifth and sixth strokes provide for intake and exhaust cooling. The system demonstrates increased reliability, efficiency, and a cooler operating environment while operating with various fuels. 1. A six-stroke internal combustion engine as herein illustrated and described. This application claims the benefit of U.S. Provisional Application No. 61/958,783, filed Aug. 6, 2013, the disclosure of which is incorporated herein by reference.It has long been desirable to reduce emissions, increase reliability, increase efficiency, operate with various fuels, and increase power of internal-combustion engines, particularly engines utilized, for example, in industrial, automotive, aviation, marine, utility, recreation and racing industries. The conventional four-stroke internal-combustion engine utilizes a fuel/air intake stroke, a compression stroke, a power stroke, and an exhaust stroke. There are many design limitations with the four-stroke engine such as, for example, valve float at higher crankshaft speeds, exhaust valve overheating, fuel/air detonation at higher compression ratios, contaminating the fuel/air intake with exhaust gases, premature quenching of the combustion stroke, required intake and exhaust valve overlap, higher octane fuels and high peak combustion temperatures and ...

Подробнее
Номер записи: 24
04-02-2016 дата публикации

METHOD AND SYSTEM FOR DIAGONAL BLOW-THROUGH EXHAUST GAS SCAVENGING

Номер: US20160032843A1
Автор: Boyer Brad Alan, Ulrey Joseph Norman, VanDerWege Brad Alan
Принадлежит:

Methods and systems are provided for operating an engine in a two-valve diagonal blow-through mode during which a majority of blow-through is directed via a first intake valve positioned diagonally across a first exhaust valve in order to increase a distance of flow path from the intake valve to the exhaust valve. 1. A method for an engine including one or more four-valve cylinder , comprising:during a first positive valve overlap mode, flowing more blow-through from an intake manifold to an exhaust manifold through a first intake valve and a first exhaust valve than through a second intake valve and a second exhaust valve of the cylinder.2. The method of claim 1 , wherein the first intake valve is positioned diagonally across the first exhaust valve in a cylinder head of the cylinder claim 1 , and the second intake valve is positioned diagonally across the second exhaust valve.3. The method of claim 2 , further comprising during a second positive valve overlap mode claim 2 , flowing blow-through through the first intake valve claim 2 , the second intake valve claim 2 , the first exhaust valve claim 2 , and the second exhaust valve.4. The method of claim 3 , wherein during the first positive valve overlap mode claim 3 , a duration of first intake valve lift is greater than a duration of second intake valve lift claim 3 , and a duration of first exhaust valve lift is greater than a duration of second exhaust valve lift.5. The method of claim 3 , wherein during the second positive valve overlap mode claim 3 , a duration of first intake valve lift is equal to a duration of second intake valve lift claim 3 , and a duration of first exhaust valve lift is equal to a duration of second exhaust valve lift.6. The method of claim 3 , further comprising claim 3 , during the first overlap mode claim 3 , not providing positive overlap between the second intake valve and the second exhaust valve when providing positive overlap between the first intake valve and the second intake ...

Подробнее
Номер записи: 25
30-01-2020 дата публикации

Variable valve drive of an internal combustion engine

Номер: US20200032718A1
Автор: Adrian Bilan, Frank Himsel
Принадлежит: Schaeffler Technologies AG and Co KG

A variable valve drive of an internal combustion engine is provided that includes at least one gas exchange valve, the valve stroke of said gas exchange valve predefined by cams of a camshaft, and by at least one switchable rocker arm. The switchable rocker arm, having a first lever and a second lever, selectively transmits cam lift to the gas exchange valve. The second lever is selectively coupled to the first lever by a coupling. The coupling is activatable by an elongated activation arm on which one leaf spring is disposed for the coupling of the switchable rocker arm. The elongated activation arm is longitudinally displaceable from a locking position to an unlocking position by a linear actuator. A damper mass is disposed or configured to be capable of oscillating on the elongated activation arm and/or on the leaf spring of the elongated activation arm.

Подробнее
Номер записи: 26
30-01-2020 дата публикации

CONTROL DEVICE FOR COMPRESSION IGNITION ENGINE

Номер: US20200032720A1
Автор: Higashio Masayoshi, Ito Michio, MASUDA Yuta, Matsushima Yuto, Sunagare Yugou, Ujihara Kenko
Принадлежит:

A control system for a compression ignition engine is provided, which includes a sensor and a cylinder count control module which changes between all-cylinder and reduced-cylinder operations when the compression ignition combustion is performed at a given lean air-fuel ratio. The cylinder count control module executes a preparation control to change from the all-cylinder operation to the reduced-cylinder operation when the change is demanded. In the preparation control, the cylinder count control module outputs a signal to a throttle valve to execute an air amount increase processing, outputs a signal to a fuel injection valve to execute a fuel amount increase processing, and outputs a signal to an ignition plug to execute a retard processing. The cylinder count control module ends the fuel amount increase processing and the retard processing when it is determined that an air-fuel ratio is in a given air-fuel ratio state, and starts the reduced-cylinder operation. 1. A control device for a compression ignition engine , the engine comprising:a plurality of cylinders;pistons configured to reciprocate inside the plurality of cylinders, respectively;a plurality of combustion chambers, each defined in the cylinder so that displacement of the combustion chamber changes according to the reciprocation of the piston;a throttle valve configured to adjust an amount of air supplied into each of the combustion chambers;ignition plugs disposed so as to be oriented to the respective combustion chambers; andfuel injection valves configured to inject fuel into the respective combustion chambers,the control device comprising circuitry and a sensor configured to measure a parameter relevant to operation of the engine,wherein the control device is configured to execute a cylinder count control module connected with the throttle valve, the ignition plugs, the fuel injection valves, and the sensor, to output signals to the throttle valve, the ignition plug, and the fuel injection valve ...

Подробнее
Номер записи: 27
11-02-2016 дата публикации

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20160040606A1
Автор: Itou Eri, Katori Yuto, KOSAKA Yusuke, UENO Masaki
Принадлежит:

A control apparatus for an internal combustion engine, which is capable of, when controlling a variable intake cam phase mechanism and a variable exhaust cam phase mechanism, ensuring a stable combustion of a mixture and improving the drivability, even when one of the two is in a failure state. The control apparatus includes an ECU. The ECU calculates an intake cam phase and an exhaust cam phase, determines, based on the calculated intake cam phase and exhaust cam phase, whether or not there has occurred a failure state of one of the mechanisms, in which the valve overlap period becomes longer than during a normal time, and controls, when it is determined that there has occurred the failure state of the one mechanism, the other mechanism such that the valve overlap period becomes shorter. 1. A control apparatus for an internal combustion engine that includes a variable intake cam phase mechanism for changing an intake cam phase which is a phase of an intake cam for opening and closing an intake valve with respect to a crankshaft , and a variable exhaust cam phase mechanism for changing an exhaust cam phase which is a phase of an exhaust cam for opening and closing an exhaust valve with respect to the crankshaft , and is capable of changing a valve overlap period of the intake valve and the exhaust valve by changing one or more of the intake cam phase and the exhaust cam phase , the control apparatus controlling one or more of the variable intake cam phase mechanism and the variable exhaust cam phase mechanism , comprising:intake cam phase acquisition means for acquiring the intake cam phase;exhaust cam phase acquisition means for acquiring the exhaust cam phase;first failure determination means for determining, based on the acquired intake cam phase and the acquired exhaust cam phase, whether or not there has occurred a first failure state which is a failure state of one mechanism of the variable intake cam phase mechanism and the variable exhaust cam phase ...

Подробнее
Номер записи: 28
08-02-2018 дата публикации

LEARNING AN INTAKE OXYGEN CONCENTRATION OF AN ENGINE

Номер: US20180038305A1
Автор: Allen Justin
Принадлежит:

System and method for learning an intake oxygen concentration of an engine. In one embodiment, the system includes an intake oxygen sensor and an electronic control unit. The intake oxygen sensor is configured to measure an oxygen concentration of intake air and output a signal indicative of an intake oxygen concentration value. The electronic control unit is configured to receive the signal indicative of the intake oxygen concentration value, determine whether fuel is being injected into an engine, determine whether the engine is operating in an over-run condition, control a valve to sweep an air pressure of an intake path of the engine across a plurality of air pressures, and store information indicative of intake oxygen concentration values across the plurality of air pressures to learn the intake oxygen concentration of the engine. 1. A system for learning an intake oxygen concentration of an engine , the system comprising: measure an oxygen concentration of intake air, and', 'output a signal indicative of an intake oxygen concentration value; and, 'an intake oxygen sensor configured to'} receive the signal indicative of the intake oxygen concentration value,', 'determine whether fuel is being injected into an engine,', 'determine whether the engine is operating in an over-run condition based at least in part on a determination that the fuel is not being injected into the engine,', 'responsive to determining that the engine is operating in the over-run condition, control a valve to sweep an air pressure of an intake path of the engine across a plurality of air pressures, and', 'responsive to controlling the valve to sweep the air pressure of the intake path across the plurality of air pressures, store information indicative of intake oxygen concentration values across the plurality of air pressures to learn the intake oxygen concentration of the engine., 'an electronic control unit communicatively connected to the intake oxygen sensor and configured to'}2. The ...

Подробнее
Номер записи: 29
06-02-2020 дата публикации

FOUR-STROKE INTERNAL COMBUSTION ENGINE THERETO RELATED VEHICLE AND METHOD

Номер: US20200040774A1
Автор: DAHL Andreas, OLOFSSON Eric
Принадлежит: SCANIA CV AB

A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronized to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent the motion of the intake valve head. 1. A four-stroke internal combustion engine comprising:a crankshaft;at least one cylinder arrangement forming a combustion chamber and comprising a cylinder bore, a piston arranged to reciprocate in the cylinder bore, a connecting rod connecting the piston with the crankshaft;an exhaust arrangement for outflow of exhaust gas from the cylinder bore, wherein the exhaust arrangement comprises an exhaust valve, an exhaust opening, and an exhaust valve head configured to seal against an exhaust valve seat of the exhaust opening;an intake arrangement for intake of fresh gas into the cylinder bore, wherein the piston performs four-strokes in the cylinder bore, corresponding to an intake stroke, a compression stroke, a power stroke, and an exhaust stroke, wherein the intake arrangement comprises an intake valve and an intake opening, the intake valve comprising an intake valve head configured to seal against an intake valve seat of the intake opening;at last one camshaft comprises a first lobe configured to cause a motion of the exhaust valve head for opening and closing the exhaust opening, and a second lobe configured to cause a motion of the intake valve head for opening and closing the intake opening, wherein the at least one camshaft is synchronized with the crankshaft to rotate at a same rotational speed as the crankshaft,wherein the exhaust arrangement comprises a first linkage arrangement configured ...

Подробнее
Номер записи: 30
26-02-2015 дата публикации

CONTROL DEVICE OF MULTI-CYLINDER ENGINE

Номер: US20150053174A1
Автор: HASHIMOTO Masanori, Nishimoto Toshiaki, Okazawa Hisashi, SASAKI Junsou
Принадлежит:

A control device of a multi-cylinder engine is provided. The control device includes an auxiliary component and a valve stopping device having a locking mechanism for stopping an operation of at least one of intake and exhaust valves of a specific cylinder of the multi-cylinder engine according to an engine operating state. The control device includes an angular speed variation detecting device for detecting an angular speed variation of a crankshaft, an auxiliary component control device for controlling a drive load of the auxiliary component. In an all-cylinder operation, when an engine load is lower than a predetermined value and the detected angular speed variation exceeds a predetermined threshold, the auxiliary component control device performs an auxiliary component drive load increase control in which the drive load of the auxiliary component is increased to reduce the angular speed variation to be lower than the predetermined threshold. 1. A control device of a multi-cylinder engine , the control device including an auxiliary component driven by the engine and a valve stopping device having a locking mechanism for stopping an operation of at least one of intake and exhaust valves of a specific cylinder of the multi-cylinder engine according to an operating state of the engine , the control device of the multi-cylinder engine comprising:an angular speed variation detecting device for detecting an angular speed variation of a crankshaft of the engine; andan auxiliary component control device for controlling a drive load of the auxiliary component,wherein, in an all-cylinder operation in which the operation of the at least one of the valves is not stopped by the locking mechanism, when an engine load is lower than a predetermined value and the angular speed variation detected by the angular speed variation detecting device exceeds a predetermined threshold, the auxiliary component control device performs an auxiliary component drive load increase control in ...

Подробнее
Номер записи: 31
14-02-2019 дата публикации

METHOD TO PERFORM INTAKE CAM LIFT STATE TRANSITIONS

Номер: US20190048806A1
Автор: HAYDEN David N., Whitney Christopher E.
Принадлежит:

A method of transitioning between two intake valve lift states while providing constant engine torque output comprehends the steps of receiving a lift change request from an engine control device, determining the current phase angles of the camshafts, and determining whether the intake and exhaust camshafts are at transition positions. The transition positions are experimentally or empirically determined combinations of operating conditions that result in constant engine torque output before and after the intake valve lift transition. If they are, an appropriate, i.e., low to high or high to low cam lift state transition of the intake valves occurs. If they are not, the cam phasers move the intake and exhaust camshafts to transition positions. When the cam phasers have moved the intake and exhaust camshafts to the transition positions, i.e., positions of constant engine torque output, the intake valve lift transitions from high to low or low to high. 1. A method of transitioning between two intake valve lift states in an internal combustion engine , comprising the steps of:providing an instruction to shift an intake valve lift state from a first state to a second state,determining current angular positions of an intake cam and an exhaust cam,determining if an intake cam and an exhaust cam are in angular positions wherein the instructed shift will result in constant engine torque output before and after the commanded shift,adjusting a phase of the intake cam and the exhaust cam to provide constant torque before and after the instructed shift.commanding an intake cam transition from a first lift state to a second lift state.2. The method of transitioning between two intake valve lift states of wherein the instruction to shift the intake valve lift state is generated in an engine control module.3. The method of transitioning between two intake valve lift states of further including the step of retarding engine spark when commanding the intake cam transition.4. The ...

Подробнее
Номер записи: 32
25-02-2021 дата публикации

INTERNAL COMBUSTION ENGINE ARRANGEMENT

Номер: US20210054792A1
Автор: Andersson Arne
Принадлежит: VOLVO TRUCK CORPORATION

The present invention relates to an internal combustion engine arrangement () comprising: a combustion cylinder provided with a reciprocating piston movable between a top dead center (TDC) and a bottom dead center (BDC) within the combustion cylinder; a first outlet valve () connected to the combustion cylinder for controllably directing exhaust gas from the combustion cylinder to a first exhaust gas manifold of the internal combustion engine arrangement; a second outlet valve (′) connected to the combustion cylinder for controllably directing exhaust gas from the combustion cylinder to a second exhaust gas manifold of the internal combustion engine arrangement; a turbocharger arrangement () comprising a turbine () and a compressor (), wherein the turbine () is arranged in fluid communication with the first exhaust gas manifold; and an exhaust emission control device () arranged in fluid communication with the second exhaust gas manifold, wherein the exhaust emission control device and the turbine are arranged in parallel with each other. 120-. (canceled)21. An internal combustion engine arrangement comprising:a combustion cylinder provided with a reciprocating piston movable between a top dead center and a bottom dead center within the combustion cylinder;a first outlet valve connected to the combustion cylinder for controllably directing exhaust gas from the combustion cylinder to a first exhaust gas manifold of the internal combustion engine arrangement;a second outlet valve connected to the combustion cylinder for controllably directing exhaust gas from the combustion cylinder to a second exhaust gas manifold of the internal combustion engine arrangement, the second exhaust gas manifold comprising a heat insulating layer, wherein the first and second outlet valves each comprises a respective first and second flow controllable actuator, the flow controllable actuators being arranged to controllably operate the respective outlet valve between an open position and ...

Подробнее
Номер записи: 33
13-02-2020 дата публикации

SYSTEMS AND METHODS FOR IN-CYLINDER FUEL DOSING FOR EXHAUST AFTERTREATMENT SYSTEM THERMAL MANAGEMENT

Номер: US20200049084A1
Автор: HENDERSON Foy C., HOEHNE John L., LINEN E. Nathan, MAHADEVAN Boopathi S., MAHATO Chandan, MISHRA Shounak
Принадлежит: Cummins Inc.

An apparatus comprises a first circuit and a second circuit. The first circuit is structured to determine that a combustion cylinder is operating in a transition period between an exhaust stroke and an intake stroke of the combustion cylinder. The second circuit is structured to provide an injection command during the transition period to a fuel injector associated with the combustion cylinder, the injection command being to inject fuel into a combustion chamber of the combustion cylinder such that at least a portion of the fuel escapes from the combustion chamber through an exhaust port of the combustion cylinder. 1. An apparatus , comprising:a first circuit structured to determine when a combustion cylinder is operating in a transition period between an exhaust stroke and an intake stroke of the combustion cylinder; anda second circuit structured to provide an injection command during the transition period to a fuel injector associated with the combustion cylinder, the injection command being to inject fuel into a combustion chamber of the combustion cylinder such that at least a portion of the fuel escapes from the combustion chamber through an exhaust port of the combustion cylinder.2. The apparatus of claim 1 , wherein an exhaust valve associated with the combustion cylinder is in an open position during the transition period between the exhaust stroke and the intake stroke.3. The apparatus of claim 2 , further comprising a valve circuit structured to selectively actuate the exhaust valve between the open position and a closed position claim 2 ,4. The apparatus of claim 2 , wherein the exhaust valve is actuated between the open position and a closed position by a camshaft of the engine.5. The apparatus of claim 1 , wherein the transition period between the exhaust stroke and the intake stroke is within a range of crank angles of a piston of the combustion cylinder between a first crank angle of about 270 degrees after top-dead-center (ATDC) of the exhaust ...

Подробнее
Номер записи: 34
13-02-2020 дата публикации

CONTROLLER FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING INTERNAL COMBUSTION ENGINE

Номер: US20200049097A1
Автор: IDOGAWA Masanao, KURODA Ryusuke, OZEKI Masahiro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A controller for an internal combustion engine includes processing circuitry. The processing circuitry is configured to execute an estimation process that estimates a density parameter of fuel in an upper layer portion of a delivery pipe and a density parameter of fuel in a lower layer portion of the delivery pipe and an operation process that includes acquiring a density parameter of the fuel injected from a fuel injection valve and operating an operation unit of the internal combustion engine based on the acquired density parameter. The estimation process includes a process that assumes that when the density of the fuel flowing into the delivery pipe is high, a greater proportion of the fuel flowing into the delivery pipe flows into the lower layer portion than when the density of the fuel flowing into the delivery pipe is low. 1. A controller for an internal combustion engine , the internal combustion engine being mounted on a vehicle and including a fuel injection valve configured to inject fuel so that the fuel is supplied to a combustion chamber of the internal combustion engine , a delivery pipe configured to supply fuel to the fuel injection valve , and a sensor provided at an upstream side of the delivery pipe and configured to detect a physical quantity correlated with a density of the fuel , whereinthe delivery pipe includes a supply area and is configured to supply the fuel from the supply area to the fuel injection valve,when a posture of the vehicle is horizontal, the supply area is located at a position biased toward one of an upper side or a lower side of the delivery pipe in a vertical direction, and an estimation process that estimates a density parameter of fuel in an upper layer portion of the delivery pipe and a density parameter of fuel in a lower layer portion of the delivery pipe in the vertical direction based on a detection value of the sensor, and', 'an operation process that includes acquiring a density parameter of the fuel injected from ...

Подробнее
Номер записи: 35
13-02-2020 дата публикации

AIR INTAKE SYSTEM FOR MULTI-CYLINDER ENGINE

Номер: US20200049110A1
Автор: Ashikaga Kensuke, EBESU Hidesaku, Higashio Masayoshi, HIRATA Toshihiko, Kato Jiro, Koga Tatsuya, KOJIMA Yuji, Nakamura Kazuhiro, Wasada Mitsunori
Принадлежит:

Intake ports include a second port configured such that a flow rate of flowing gas is adjusted via a swirl control valve. When a surge tank is viewed in a cylinder axis direction, first and second branched passages are connected with a space being interposed therebetween in a cylinder array direction, and are connected to the surge tank on extension lines, each of which extends from an upstream end portion of an independent passage connected to the second port to an opposite side of each cylinder. 1. An air intake passage structure for an engine comprising:at least three or more of a plurality of cylinders that are arranged in an array;a plurality of intake ports that respectively communicate with the plurality of cylinders; andan air intake passage that is connected to each of the plurality of intake ports, whereinfor each of the plurality of cylinders, the plurality of intake ports include a swirl control valve (SCV) port that is configured to reduce a flow rate of flowing gas via a swirl control valve, a plurality of independent passages that are respectively connected to the plurality of intake ports;', 'a surge tank, to which upstream end portions of the plurality of independent passages arranged in an array according to an alignment order of the corresponding cylinders are connected; and', 'a plurality of upstream passages, a downstream end portion of each of which is connected to the surge tank, and each of which introduces the gas into the surge tank, and, 'the air intake passage hasthe plurality of upstream passages are arranged with a space being interposed therebetween in a cylinder array direction, and, when the surge tank is viewed in a cylinder axis direction, the plurality of upstream passages are connected to the surge tank on extension lines, each of which extends from the upstream end portion of one of the independent passages connected to one of the SCV ports to an opposite side of the plurality of cylinders.2. The air intake system for the multi- ...

Подробнее
Номер записи: 36
22-02-2018 дата публикации

VARIABLE VALVE DURATION APPARATUS

Номер: US20180051602A1
Автор: KIM Jaechun, SEOK Donghoon
Принадлежит: HYUNDAI MOTOR COMPANY

A variable valve duration apparatus may include a first cam rotating with a camshaft; a second cam rotating with the camshaft; a first operation device that is operated by the first cam to generate a valve lift; a second operation device that is operated by the second cam to generate the valve lift; and a controller controlling the first operation device or the second operation device to generate the valve lift according to an operation state of an engine. 1. A variable valve duration apparatus , comprising:a first cam rotating with a camshaft;a second cam rotating with the camshaft;a first operation device that is configured to be operated by the first cam to generate a valve lift;a second operation device that is configured to be operated by the second cam to generate the valve lift; anda controller controlling the first operation device or the second operation device to generate the valve lift according to an operation state of an engine.2. The variable valve duration apparatus of claim 1 , whereinthe controller is configured to control the first operation device to generate the valve lift when a rotation speed of the engine is smaller than a first predetermined value or greater than a second predetermined value.3. The variable valve duration apparatus of claim 1 , whereinthe controller is configured to control the second operation device to generate the valve lift when a rotation speed of the engine is between a first predetermined value and a second predetermined value.4. The variable valve duration apparatus of claim 1 , further including:a latching device variably operating a valve by fixing or releasing the first operation device and the second operation device.5. The variable valve duration apparatus of claim 4 , whereinthe controller is configured to control the latching device to fix the first operation device and the second operation device when a rotation speed of the engine is between a first predetermined value and a second predetermined value, and ...

Подробнее
Номер записи: 37
20-02-2020 дата публикации

Hybrid valve train system

Номер: US20200056514A1
Автор: Darren Yaoshun Ting, David M. Barnes
Принадлежит: Cummins Inc

For a given cylinder in the engine having two intake valves and two exhaust valves, one of the intake valves is driven by a bucket tappet, while the other intake valve is actuated via a roller finger follower. Similarly, one of the exhaust valves is driven by a bucket tappet, while the other exhaust valve is actuated via a roller finger follower. The intake valves read inputs form an intake camshaft, and the exhaust valves read inputs from an exhaust camshaft.

Подробнее
Номер записи: 38
04-03-2021 дата публикации

METHODS AND SYSTEMS FOR A VEHICLE

Номер: US20210062738A1
Автор: Breuer Albert, Lorenz Thomas, Ruhland Helmut
Принадлежит:

Methods and systems are provided for a hydrogen combustion engine. In one example, a method may include operating the hydrogen combustion engine at one of two combustion air ratios, wherein a combustion air ratio between the two is avoided via adjusting one or more operating parameters. 1. A method for operating a hydrogen combustion engine configured to burn a hydrogen-containing fuel in a combustion chamber of the hydrogen combustion engine , the method comprising:{'sub': 'A', 'operating the hydrogen combustion engine with a first combustion air ratio with a λ≤1 during conditions of higher torque demand;'}{'sub': 'B', 'operating the hydrogen combustion engine with a second combustion air ratio with a λ≥2 during conditions of lower torque demand; and'}switching from the second combustion air ratio to the first combustion air ratio in response to a torque demand increasing, wherein switching comprises advancing an intake valve opening to increase EGR flow to the combustion chamber as a fuel injection amount is increased.2. The method of claim 1 , wherein the hydrogen combustion engine is operated with only the first combustion air ratio or with the second combustion air ratio.3. The method of claim 1 , wherein the torque demand is based on an accelerator pedal position claim 1 , and wherein the torque demand increasing comprises the accelerator pedal position being depressed.4. The method of claim 1 , wherein advancing the intake valve opening comprises overlapping the intake valve opening with an exhaust valve opening.5. The method of claim 1 , wherein advancing the intake valve opening includes adjusting the intake valve opening to a boot lift profile claim 1 , wherein the boot lift profile comprises opening the intake valve at a crank angle of 270°.6. The method of claim 1 , wherein advancing the intake valve opening includes adjusting the intake valve opening to a multi-lift profile claim 1 , wherein the multi-lift profile comprises opening the intake valve at a ...

Подробнее
Номер записи: 39
28-02-2019 дата публикации

VALVETRAIN WITH VARIABLE VALVE ACTUATION

Номер: US20190063273A1
Автор: JR. James E., McCarthy, Yankovic Eric
Принадлежит: EATON CORPORATION

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 1. A method of providing a rocker arm set for a valvetrain , the method comprising:providing a first intake rocker arm configured as a switching rocker arm for a first intake valve on a first cylinder;providing a second intake rocker arm for a second intake valve on a second cylinder, the second rocker arm configured to operate in a normal Otto cycle mode;providing a first exhaust rocker arm for a first exhaust valve on the second cylinder; andwherein (i) the first intake rocker arm operates in one of a late intake valve closing mode (LIVC) and an early intake valve closing mode (EIVC), where the first intake rocker arm is configured to one of open and close at a different time compared to the second intake valve, and (ii) the first exhaust rocker arm operates in a cylinder deactivation mode.2. The method of wherein the first intake rocker arm operates in added motion and wherein the first intake rocker arm operates in LIVC wherein the first intake rocker arm closes the first intake valve later than the second intake valve.3. The method of where the first intake rocker arm operates in EIVC wherein the first intake rocker arm opens the first intake valve earlier than the second intake valve.4. The ...

Подробнее
Номер записи: 40
10-03-2016 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20160069279A1
Автор: Nakashima Toyokazu, YAMAMOTO Shunsuke
Принадлежит:

A control device for an internal combustion engine includes a controller. The controller controls the relative rotation phase of the exhaust camshaft in accordance with the relative rotation phase of the intake camshaft. When a request for locking the relative rotation phase of the intake camshaft at an intermediate phase is generated, the controller controls the relative rotation phase of the exhaust camshaft such that the relative rotation phase of the exhaust camshaft is changed to a phase corresponding to the intermediate phase independently from the relative rotation phase of the intake camshaft. 1. A control device for an internal combustion engine , wherein the engine includes:an intake-side hydraulic drive variable valve timing mechanism configured to change a valve timing of an intake valve by changing a rotation phase of an intake camshaft relative to a crankshaft;an exhaust-side hydraulic drive variable valve timing mechanism configured to change a valve timing of an exhaust valve by changing a rotation phase of an exhaust camshaft relative to the crankshaft; anda lock mechanism configured to mechanically lock the relative rotation phase of the intake camshaft at an intermediate phase between a most retarded phase and a most advanced phase, whereinthe lock mechanism is provided only in the intake-side variable valve timing mechanism,the control device comprises a controller,when no request for locking the relative rotation phase of the intake camshaft at the intermediate phase is generated, the controller controls the relative rotation phase of the exhaust camshaft in accordance with the relative rotation phase of the intake camshaft, andwhen a request for locking the relative rotation phase of the intake camshaft at the intermediate phase is generated, the controller controls the relative rotation phase of the exhaust camshaft such that the relative rotation phase of the exhaust camshaft is changed to a phase corresponding to the intermediate phase ...

Подробнее
Номер записи: 41
10-03-2016 дата публикации

SOLENOID ACTUATOR

Номер: US20160071640A1
Автор: Kato Ichiro
Принадлежит:

A plunger is formed of a soft magnetic material to have one end connected a regulation pin. A permanent magnet is affixed to a stationary portion, which is stationary relative to the plunger, to attract the plunger in a retreated direction. A coil generates a magnetic flux in an opposite direction of the permanent magnet to reduce a magneto attraction force, which attracts the plunger. A spring biases the regulation pin in an advanced direction. The spring applies a biasing force to the regulation pin to move the regulation pin in the advanced direction when electricity is supplied to the coil to reduce the magneto attraction force of the permanent magnet. A magnetism detection unit is located on a magnetic circuit, which conducts a magnetic flux generated by the permanent magnet and the coil, to detect a magnetic flux density. 1. A solenoid actuator for a valve lift control device , the valve lift control device being configured to control a lift of an intake valve or a lift of an exhaust valve of an internal combustion engine , the valve lift control device having a slider , which is rotatable with a camshaft and is movable in an axial direction relative to the camshaft , the solenoid actuator configured to advance a regulation pin when fitting a tip end of the regulation pin to a fitting groove of the slider , the solenoid actuator further configured to cause the regulation pin pushed back by application of a torque of the camshaft when retreating the tip end of the regulation pin from the fitting groove , the solenoid actuator comprising:the regulation pin configured to advance to the fitting groove;a plunger formed of a soft magnetic material, the plunger having one end connected with the regulation pin;a permanent magnet affixed to a stationary portion, which is stationary relative to the plunger, and configured to attract the plunger in a retreated direction;a coil configured to generate a magnetic flux in an opposite direction of the permanent magnet to ...

Подробнее
Номер записи: 42
11-03-2021 дата публикации

Sensor assembly for a sliding camshaft of a motor vehicle

Номер: US20210071549A1
Автор: Daniele Ciola, Davide DI NUNNO
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A sensor assembly for a sliding camshaft of a motor vehicle is provided. The sliding camshaft includes a base shaft that extends along a longitudinal axis and rotates about the longitudinal axis. The sliding camshaft further includes lobe banks rotationally fixed to the base shaft. Each lobe bank is axially movable between first and second positions relative to the base shaft. The sensor assembly includes a detection element rotationally fixed relative to the base shaft and axially movable between first and second positions relative to the base shaft. The sensor assembly further includes a sensor operably coupled to the detection element and configured to generate a signal indicative of an axial position of the detection element relative to the base shaft and at least one of an angular speed of the base shaft and an angular position of the base shaft about the longitudinal axis.

Подробнее
Номер записи: 43
11-03-2021 дата публикации

CONTROL METHOD FOR CYLINDER DEACTIVATION AND ENGINE TO WHICH THE SAME IS APPLIED

Номер: US20210071604A1
Автор: HA Kyoung Pyo, KIM Hyeon Woo
Принадлежит:

An engine includes: a duration apparatus for adjusting an opening duration of an intake valve, a Cylinder De-Activation (CDA) apparatus for controlling deactivation of an exhaust valve, an igniter, an injector for injecting a fuel, an operation state signal unit for measuring an operation state of a vehicle, and a controller for controlling the operations of the duration apparatus, the CDA apparatus, the igniter, and the injector based on an output signal from the operation state signal unit. A control method for this engine includes: determining, by the controller, whether the operation state of the vehicle corresponds to a CDA operation mode; and when the CDA operation mode is determined, operating the CDA apparatus so as to stop the operations of the igniter and the injector, increase an opening duration of the intake valve, and deactivate the exhaust valve by controlling the CDA apparatus. 1. A control method of an engine , where the engine includes a duration apparatus for adjusting an opening duration of an intake valve , a Cylinder De-Activation (CDA) apparatus for controlling deactivation of an exhaust valve , an igniter , an injector for injecting a fuel , an operation state signal unit for measuring an operation state of a vehicle and outputting a corresponding signal , and a controller for controlling the duration apparatus , the CDA apparatus , the igniter , and the injector based on the output signal from the operation state signal unit , the control method comprising:determining, by the controller, whether the operation state of the vehicle corresponds to a CDA operation mode based on the output signal from the operation state signal unit; andwhen the CDA operation mode is determined, operating, by the controller, the CDA apparatus, stop operations of the igniter and the injector,', 'increase an opening duration of the intake valve by controlling the duration apparatus, and', 'stop the operation of the exhaust valve by controlling the CDA apparatus., ' ...

Подробнее
Номер записи: 44
15-03-2018 дата публикации

BLOW-BY GAS SUPPLY DEVICE FOR ENGINE

Номер: US20180073451A1
Автор: OZAWA Tomoya
Принадлежит: SUBARU CORPORATION

A blow-by gas supply device includes an upstream-side passage, a downstream-side passage, a gas passage, a bypass passage, a valve mechanism, and a valve control unit. The device is provided in an engine including a compressor, and recirculates blow-by gas upstream of the compressor. The upstream-side passage is coupled to an input port of the compressor. The downstream-side passage is coupled to an output port of the compressor. The gas passage is coupled to the upstream-side passage and guides the blow-by gas from inside of the engine to the upstream-side passage. The bypass passage is coupled to the upstream-side passage and the downstream-side passage and guides the intake air from the downstream side passage to the upstream side passage. The valve mechanism is provided in the bypass passage and switched between communication and cutoff states. The valve control unit controls the valve mechanism in the communication or cutoff state. 1. A blow-by gas supply device for an engine , the engine including a compressor that is configured to compress intake air , the blow-by gas supply device being configured to be provided in the engine and to recirculate blow-by gas to an upstream side of the compressor , the blow-by gas supply device comprising:an upstream-side passage configured to be coupled to an input port of the compressor and guide the intake air to be suctioned into the input port;a downstream-side passage configured to be coupled to an output port of the compressor and guide the intake air discharged from the output port;a gas passage coupled to the upstream-side passage and configured to guide the blow-by gas from inside of the engine to the upstream-side passage;a bypass passage coupled to the upstream-side passage and the downstream-side passage and configured to guide the intake air from the downstream side passage to the upstream. side passage;a valve mechanism provided in the bypass passage and configured to be switched between a communication state ...

Подробнее
Номер записи: 45
05-03-2020 дата публикации

METHOD FOR VERIFYING CVVD LOCATION LEARNING RESULT AND CVVD SYSTEM THEREOF

Номер: US20200072097A1
Автор: KOO Bon-Chang
Принадлежит:

A method for verifying a CVVD location learning result may include performing a learning value verification control by confirming a position of a control shaft connected to a motor with a signal value of an auxiliary cam sensor for a rotation of a camshaft if a controller determines that a learning value acquired in a short duration and a long duration of a CVVD system is desired to be verified. 1. A method for verifying a CVVD location learning result , comprising the steps of:determining by a controller whether a learning value acquired in a short duration and a long duration of a CVVD system is required to be verified; andperforming a learning value verification control by comparing a position of a control shaft connected to a motor with a signal value of an auxiliary cam sensor that detects rotation of a cam shaft.2. The method of claim 1 , wherein the auxiliary cam sensor is positioned at a middle portion of the cam shaft.3. The method of claim 1 , wherein the step of determining whether a learning value is required to be verified is based on conditions of each of a CVVD system hardware abnormality claim 1 , a learning value abnormality claim 1 , and a motor voltage abnormality claim 1 , and wherein the learning value verification control is performed when all the conditions are not satisfied claim 1 , and wherein it is determined that learning is abnormal when any one of the conditions is satisfied claim 1 , and upon determining a learning abnormality further comprising the step of switching from the learning value verification control to the re-learning control for learning each of the long duration and the short duration.4. The method of claim 3 , wherein the learning value verification control is divided into a long position verification control and a short position verification control claim 3 , and wherein in the long position verification control a signal value of the auxiliary cam sensor is applied to a threshold claim 3 , and wherein in the short ...

Подробнее
Номер записи: 46
05-03-2020 дата публикации

METHOD OF CONTINUOUSLY VARIABLE VALVE DURATION POSITION LEARNING BASED ON CONDITIONAL APPLICATION AND CONTINUOUSLY VARIABLE VALVE DURATION SYSTEM THEREFOR

Номер: US20200072132A1
Автор: BYUN Jung-Sup, Woo Hee-Nam
Принадлежит:

A method of continuously variable valve duration (CVVD) location learning may include when a controller determines necessity of position learning for short duration and long duration of a CVVD system, performing conditional application re-learning control in which the position learning is performed in a situation in which validity determination of system environment condition for CVVD hardware and validity determination of vehicle environment condition for engine operation information of an engine are satisfied. 1. A method of continuously variable valve duration (CVVD) location learning , comprising:when a controller determines a need for position learning for short duration and long duration of a CVVD system, performing conditional application re-learning control in which the position learning is performed only in a situation in which validity determination of a system environment condition for CVVD hardware and validity determination of a vehicle environment condition for engine operation information of an engine are satisfied.2. The method of claim 1 , wherein the position learning is performed by determining necessity of a situation in which an existing learning value is not applicable due to replacement of the CVVD hardware.3. The method of claim 2 , wherein the replacement is a motor of the CVVD hardware.4. The method of claim 1 , wherein the position learning is performed by setting a Hall sensor claim 1 , a motor claim 1 , and a controller area network (CAN) claim 1 , which are applied as the CVVD hardware claim 1 , as a system environment condition factor and determining system environment condition validity according to a normal operation state of the system environment condition factor.5. The method of claim 4 , wherein the determination of the system environment condition validity is satisfied by setting a state of the hall sensor claim 4 , a state of the motor claim 4 , and a state of the CAN as selection conditions.6. The method of claim 5 , further ...

Подробнее
Номер записи: 47
23-03-2017 дата публикации

Hybrid power supply system and method of supplying power from engine

Номер: US20170082050A1
Автор: Bryan G. Lammers
Принадлежит: Caterpillar Inc

A hybrid power supply system for an engine is disclosed. The hybrid power supply system includes a sensing unit to generate a signal indicative of a speed of the engine and a controller to determine the speed of the engine based on the signal received from the sensing unit. The controller compares the speed of the engine with a predefined maximum idle speed, and cuts off a supply of fuel to the engine, when the speed of the engine is greater than or equal to the predefined maximum idle speed. The controller shuts off an inlet valve and an exhaust valve associated with a cylinder of the engine. The closure of the inlet valve and the exhaust valve allow compression and expansion of air within the cylinder during supply of a rotational power by a flywheel.

Подробнее
Номер записи: 48
21-03-2019 дата публикации

Switching rocker arm

Номер: US20190085732A1
Автор: James E. McCarthy, Jr., Matthew Vance
Принадлежит: Eaton Corp

A rocker arm assembly includes an outer arm having first and second low lift lobe contacting surfaces, an inner arm, and a latch assembly. The inner arm includes first and second opposed sidewalls extending between a first end and a second end, and a high lift lobe contacting surface disposed between the first and second opposed sidewalls. The first end is pivotably secured to the outer arm and operably associated with an engine valve, and the second end is operably associated with a lash adjuster and defining a latch bore. The latch assembly is movable between a first configuration and a second configuration. In the first configuration, the latch assembly engages the outer arm such that the outer arm rotates with the inner arm, and in the second configuration, the latch assembly disengages the outer arm such that the outer arm rotates independently from the inner arm.

Подробнее
Номер записи: 49
30-03-2017 дата публикации

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE CONTINUOUS VARIABLE VALVE DURATION APPARATUS

Номер: US20170089229A1
Автор: KIM Kyung Mo
Принадлежит:

A continuous variable valve duration system includes a camshaft, a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable, an inner bracket for transmitting rotation of the camshaft to the first cam portion, a slider housing into which the inner bracket is rotatably inserted, on which a control slot is formed, and the slider housing being rotatable around a pivot shaft, a first rocker arm of which a first end contacts with the first cam and of which a second end is connected to a first valve, a rocker shaft of which the first rocker arm is rotatably connected thereto and of which an eccentric shaft inserted into the control slot is formed thereto, and a control portion for rotating the rocker shaft for the slider housing to be moved with respect to the camshaft. 1. A continuous variable valve duration system comprising:a camshaft;a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable;an inner bracket for transmitting rotation of the camshaft to the first cam portion;a slider housing into which the inner bracket is rotatably inserted, on which a control slot is formed, and the slider housing being rotatable around a pivot shaft;a first rocker arm of which a first end contacts with the first cam and of which a second end is connected to a first valve;a rocker shaft of which the first rocker arm is rotatably connected thereto and of which an eccentric shaft inserted into the control slot is formed thereto; anda control portion for rotating the rocker shaft for the slider housing to be moved with respect to the camshaft.2. The continuous variable valve duration system of claim 1 , wherein a first and a second slot are formed in the inner bracket claim 1 , andthe first cam portion comprises a first wheel on which a first wheel key is formed ...

Подробнее
Номер записи: 50
19-03-2020 дата публикации

CONTROL SYSTEM AND CONTROL METHOD FOR HYDRAULIC VARIABLE VALVE

Номер: US20200088072A1
Автор: Choi Myung Sik
Принадлежит:

A control system for a hydraulic variable valve. The control system may include an OCV configured with a housing, a flow passage defined in the housing, a main port, first and second drain ports, a spool, and a relief valve; a main line connecting the main port and the oil pump to each other; a control line connecting the control port and the lash adjuster to each other; an orifice provided between the main line and the control line; and a controller controlling the OCV to allow at least one combination of the main port and the first drain port, the control port and the second drain port, and the main port and the control port to communicate with each other. 1. A control system for a hydraulic variable valve , the control system comprising:an oil control valve (OCV) configured with a housing having a flow passage defined therein, a main port provided on an outer circumferential surface of the housing and allowing the flow passage and an oil pump to communicate with each other, first and second drain ports provided on the outer circumferential surface of the housing and allowing the flow passage and a lash adjuster to communicate with each other, a spool moved along the flow passage by a solenoid to open and close the main port, a control port, and the first and second drain ports, and a relief valve provided in the flow passage at a section where the control port and the second drain port are connected to each other and allowing pressure on a control port side to be maintained at a predetermined pressure;a main line connecting the main port and the oil pump to each other;a control line connecting the control port and the lash adjuster to each other;an orifice provided between the main line and the control line; anda controller controlling the OCV to allow at least one combination of the main port and the first drain port, the control port and the second drain port, and the main port and the control port to communicate with each other.2. The control system of claim 1 ...

Подробнее
Номер записи: 51
19-03-2020 дата публикации

METHOD FOR COMPENSATING A GAS SPRING EFFECT DURING CYLINDER SHUT-OFF WITH EXHAUST GAS TRAPPING

Номер: US20200088115A1
Автор: GESSENHARDT Christopher, THALER Tim
Принадлежит: VOLKSWAGEN AKTIENGESELLSCHAFT

A method for controlling a multi-cylinder combustion engine, wherein the combustion engine has a first operating state in which all cylinders are active, and a second operating state in which one of the multiple cylinders is active and one of the multiple cylinders is deactivated. The method comprises switching the combustion engine from the first to the second operating state, wherein, in the cylinder to be deactivated, an exhaust valve is deactivated after a combustion stroke and an intake valve is deactivated before an intake stroke following the combustion stroke in the closed state, and changing an ignition angle of the cylinder to be deactivated to an earlier ignition time and an optional change of the air/fuel mixture leads to a reduction in a temperature of an exhaust gas arising during the combustion stroke. 1. A method for controlling a multi-cylinder combustion engine that comprises a first operating state in which all cylinders are active and a second operating state in which one of the multiple cylinders is active and one of the multiple cylinders is deactivated , the method comprisingswitching the combustion engine from the first to the second operating state, wherein, in the cylinder to be deactivated, an exhaust valve is deactivated after a combustion stroke and an intake valve is deactivated before an intake stroke following the combustion stroke in the closed state; andchanging an ignition angle of the cylinder to be deactivated to an earlier ignition time in order to reduce a temperature of an exhaust gas resulting during the combustion stroke.2. The method according to claim 1 , further comprising: leaning an air/fuel mixture in the cylinder to be deactivated.3. The method according to claim 1 , further comprising: increasing a torque contribution that can be generated by the active cylinder as a function of a gas spring effect that is caused by the exhaust gas trapped in the deactivated cylinder.4. The method according to claim 3 , wherein ...

Подробнее
Номер записи: 52
19-03-2020 дата публикации

AFTERTREATMENT TEMPERATURE MANAGEMENT VIA BOOT-SHAPED VALVE LIFT PROFILES

Номер: US20200088116A1
Автор: JR. James E., McCarthy, Vance Matthew A.
Принадлежит: Eaton Intelligent Power Limited

A method for advancing valve actuation during low load or idle diesel engine conditions to promote aftertreatment heat up comprises switching a cam phaser from a nominal lift position to an advance lift position to open an affiliated valve before nominal. Valve lift is actuated via the cam phaser. The valve is lowered towards nominal closure, and valve closure is interrupted by actuating a latch phaser. Valve closure is extended beyond nominal valve closure. 125-. (canceled)26. A method for advancing valve actuation during low load or idle diesel engine conditions to promote aftertreatment heat up , comprising:switching a cam phaser from a nominal lift position to an advance lift position to open an affiliated valve before nominal;actuating valve lift via the cam phaser;lowering the valve towards nominal closure;interrupting valve closure by actuating a latch phaser; andextending valve closure beyond nominal valve closure.27. A method for exhaust thermal management on a cylinder of a diesel combustion engine , comprising:implementing late exhaust valve closing on a first exhaust valve of a pair of exhaust valves;implementing one of a normal exhaust valve closing and an early exhaust valve opening on a second exhaust valve of the pair of exhaust valves;opening an intake valve to provide negative valve overlap with the late exhaust valve closing of the first exhaust valve, where both the intake valve and the first exhaust valve are open at the same time;implementing internal exhaust gas recirculation via the negative valve overlap; andincreasing the exhaust temperature of an affiliated exhaust stream via the internal exhaust gas recirculation.28. The method of claim 27 , comprising: implementing the late exhaust valve closing via cam phasing.29. The method of claim 27 , comprising lifting the first exhaust valve at the late exhaust valve closing a lower lift than the second exhaust valve of the pair of exhaust valves.30. The method of claim 27 , comprising switching ...

Подробнее
Номер записи: 53
30-03-2017 дата публикации

SOLENOID ACTUATOR

Номер: US20170092407A1
Автор: Kato Ichiro
Принадлежит: Denso Corporation

A plunger is formed of a soft magnetic material to have one end connected a regulation pin. A permanent magnet is affixed to a stationary portion to attract the plunger in a retreated direction. A coil generates a magnetic flux in an opposite direction of the permanent magnet to reduce a magneto attraction force, which attracts the plunger. A spring biases the regulation pin in an advanced direction. The spring applies a biasing force to the regulation pin to move the regulation pin in the advanced direction when electricity is supplied to the coil to reduce the magneto attraction force of the permanent magnet. A molded portion defines a magnet accommodation hole and a cover member covers the permanent magnet housed in the magnet accommodation hole. A magnetism detection unit is disposed on an opposite side of an inner surface of the cover from the permanent magnet. 1. A solenoid actuator for a valve lift control device , the valve lift control device being configured to control a lift of an intake valve or a lift of an exhaust valve of an internal combustion engine , the valve lift control device having a slider , which is rotatable with a camshaft and is movable in an axial direction relative to the camshaft , the solenoid actuator configured to advance a regulation pin when fitting a tip end of the regulation pin to a fitting groove of the slider , the solenoid actuator further configured to cause the regulation pin pushed back by application of a torque of the camshaft when retreating the tip end of the regulation pin from the fitting groove , the solenoid actuator comprising:the regulation pin configured to advance to the fitting groove;a plunger formed of a soft magnetic material, the plunger being movable along a direction and having one end connected with the regulation pin;a permanent magnet affixed to a stationary portion, which is stationary relative to the plunger, and configured to attract the plunger in a retreated direction;a coil configured to ...

Подробнее
Номер записи: 54
07-04-2016 дата публикации

METHOD FOR OPERATING A COMPRESSION IGNITION ENGINE

Номер: US20160097316A1
Автор: CHRISTINER Peter, GRUBER Friedrich, MUSU Ettore, SPYRA Nikolaus, TINSCHMANN Georg, TRAPP Christian
Принадлежит:

A method for operating a compression ignition engine includes forming a combustible mixture by mixing generally homogeneously a first fuel and air and introducing this mixture into the at least one cylinder, compressing the combustible mixture with the piston in a compression stroke, injecting a second fuel to the combustible mixture at an injection-time of the second fuel during the compression stroke but before start of combustion, and continuing the compression stroke until combustion starts at those locations in the at least one cylinder where concentration of the second fuel is highest and/or the temperature of the mixture is the highest. Emission of the cylinder and/or mechanical stress of the cylinder caused by the combustion are monitored, and if emissions and/or mechanical stress are above respective predetermined thresholds, individually for the cylinder, the amount and/or the timing of the second fuel injected, and/or temperature of the cylinder charge is changed. 2. Method according to claim 1 , wherein the first fuel is natural gas or a mixture of natural gas and CO2 such that the amount of CO2 and CH4 ist higher than 80%.3. Method according to claim 1 , wherein the second fuel has a cetane number between 30 and 70 claim 1 , preferably between 40 and 60.4. A method according to claim 1 , wherein monitoring emission of the at least one cylinder and/or mechanical stress of the at least one cylinder caused by the combustion is being carried out by measuring signals characteristic for the combustion event in the at least one cylinder.5. A method according to claim 4 , wherein the step of measuring signals characteristic for the combustion event in the at least one cylinder comprises determining a characteristic position in time of the combustion event and/or duration of the combustion event.6. A method according to claim 1 , wherein the step of changing the amount of the second fuel injected comprises reducing the amount of the second fuel if the mechanical ...

Подробнее
Номер записи: 55
01-04-2021 дата публикации

CONTROL METHOD OF VARIABLE STROKE ENGINE FOR REFORMING HIGH-OCTANE FUEL UNDER THE FLEXIBLE CYLINDER ENGINE (FCE) MODE

Номер: US20210095604A1
Автор: Liu Haifeng, MI Shan, Wang Hu, Wang Yang, YAO Mingfa, ZHENG Zunqing
Принадлежит:

The present invention discloses a control method of variable stroke engine for reforming high-octane fuel under the FCE mode, the ECU connected to the engine controls the amount of fuel injected from the flexible cylinder injector to the flexible cylinder and controls the switch state of inlet valve and exhaust valve of the flexible cylinder, so that the flexible cylinder can be switched between two-stroke mode and four-stroke mode according to the actual engine operating conditions; when the engine is at a small load and needs to promote combustion stability, the flexible cylinder injector injects a rich fuel with equivalence ratio greater than 1 into the flexible cylinder, the flexible cylinder is at two-stroke mode; when the engine is at a large load and needs sufficient power output, the flexible cylinder injector injects a conventional fuel into the flexible cylinder, said flexible cylinder is at four-stroke mode. 1. A control method of variable stroke engine for reforming high-octane fuel under a flexible cylinder engine (FCE) mode , wherein{'b': 7', '8, 'the variable stroke engine comprises an air inlet system, a plurality of working cylinders () and at least one combustion flexible cylinder ();'}{'b': 13', '12', '9', '12', '21', '9, 'the air inlet system comprises a turbine (), a supercharger (), a main air inlet pipe () connected to the supercharger (), and a three-way air inlet valve () provided on the main air inlet pipe ();'}{'b': 9', '21', '2', '1', '9', '2', '2', '1, 'the main air inlet pipe () is divided into two ways via the three-way air inlet valve (), one is a working cylinder air inlet pipe (), the other is a flexible cylinder air inlet pipe (), a working loop is arranged between the main air inlet pipe () and the working cylinder air inlet pipe (), and a fuel reforming loop is arranged between the working cylinder air inlet pipe () and the flexible cylinder air inlet pipe ();'}{'b': 1', '19', '8', '17', '8', '18', '20', '3', '18', '20', '8', '3, ...

Подробнее
Номер записи: 56
05-04-2018 дата публикации

Internal combustion engine

Номер: US20180094592A1
Автор: Hirotaka Kawatsu, Hiroyuki Natsui, Kenji Nishida, Masaki Cho, Ryota Takahashi, Tomiyuki Sasaki
Принадлежит: Honda Motor Co Ltd

An internal combustion engine is configured to satisfy the relation expressed by 0<Rv<0.000438×θ 2 −0.0407×0+1.55 in a range of an intake valve overlap amount θ(°) from 20° to 45°, where Rv denotes an intake port volume ratio obtained by dividing an intake port internal volume Vp by a cylinder stroke volume Vc, and the intake valve overlap amount θ(°) is a crank angle from an intake valve opening timing when the intake valve starts opening to an intake top dead center of the piston. The engine improves output performance as well as both combustion performance and emission performance by suppressing reverse flow of the combustion gas into the intake system.

Подробнее
Номер записи: 57
12-05-2022 дата публикации

Systems and methods for hot air injection into exhaust ports

Номер: US20220145790A1
Автор: Brad Alan VanDerWege, Peter C. Moilanen, Thomas Leone, Xiaogang Zhang
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for reducing emissions during an engine cold start. In one example, a method may include, during emission control device heating, injecting heated air into an exhaust runner of each cylinder of the engine during an exhaust stroke of the corresponding cylinder, after a blowdown exhaust pulse. In this way, an amount of hydrocarbons in feedgas provided to the emission control device prior to the emission control device reaching its light-off temperature may be reduced.

Подробнее
Номер записи: 58
28-03-2019 дата публикации

Variable displacement engine including different cam lobe profiles

Номер: US20190093525A1
Автор: Danny Nakhle, Kevin Shinners, Robert Stephen Furby
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for an engine including cams having different lobe profiles. In one example, cams of a first cam group drive a plurality of deactivatable cylinder valves and cams of a second cam group drive a plurality of non-deactivatable cylinder valves. The cams of the first cam group include a different lobe profile relative to cams of the second cam group.

Подробнее
Номер записи: 59
12-04-2018 дата публикации

MULTI-STEP SLIDING CAM ACTUATORS FOR INTERNAL COMBUSTION ENGINE ASSEMBLY

Номер: US20180100414A1
Автор: Gallon Robert J.
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Disclosed are sliding cam actuators, methods for making and using such actuators, and motor vehicles with internal combustion engines employing sliding cam actuators. A sliding cam actuator is disclosed with two actuator pins projecting from an actuator housing. These pins move from retracted to extended positions and engage a shift barrel on a sliding camshaft. An actuator assembly moves each actuator pin to its extended position into engagement with the shift barrel to thereby slide the camshaft to a different location. An actuator shank is attached to the actuator housing and engaged with the actuator pins. Moving the first actuator pin to its extended position moves the actuator shank in one direction, which moves the second actuator pin towards its retracted position. Moving the second actuator pin to its extended position causes the actuator shank to move in another direction, which moves the first actuator pin towards its retracted position. 1. A sliding cam actuator for an internal combustion engine (ICE) assembly , the ICE assembly including multiple engine valves operatively engaged with a sliding camshaft , the sliding camshaft bearing a shift barrel and multiple cams , the sliding cam actuator comprising:an actuator housing;first and second actuator pins projecting from the actuator housing, the actuator pins being configured to selectively move from respective first and second retracted to respective first and second extended positions and engage the shift barrel to thereby slide the camshaft;a pin actuator assembly attached to the actuator housing and operable in first and second activated states, wherein the pin actuator, when in the first activated state, moves the first actuator pin to the first extended position into engagement with the shift barrel to thereby slide the camshaft to a first cam location, wherein the pin actuator, when in the second activated state, moves the second actuator pin to the second extended position into engagement with ...

Подробнее
Номер записи: 60
12-04-2018 дата публикации

Continuous Variable Duration System and Engine Provided with the Same

Номер: US20180100443A1
Автор: KIM Kyung Mo
Принадлежит:

A continuous variable valve duration system may include a camshaft, and a first cam portion including a first cam. The camshaft is inserted in the first cam portion. A relative phase angle of the first cam with respect to the camshaft is variable. The system may further include an inner bracket transmitting rotation of the cam shaft to the first cam portion, a slider housing in which the inner bracket is rotatably inserted and movable along a predetermined first direction, a rocker shaft, a first rocker arm rotatably disposed to the rocker shaft of which a first end contacts with the first cam and of which a second end is connected to a first valve, an upper housing connected with the slider housing and relatively movable with respect to the slider housing along a second direction vertical to the first direction and a control portion selectively moving the upper housing. 1. A continuous variable valve duration system comprising:a camshaft;a first cam portion including a first cam, wherein the camshaft is inserted in the first cam portion, and wherein a relative phase angle of the first cam with respect to the camshaft is variable;an inner bracket transmitting rotation of the camshaft to the first cam portion;a slider housing in which the inner bracket is rotatably inserted and movable along a predetermined first direction;a rocker shaft;a first rocker arm rotatably disposed to the rocker shaft, a first end of the first rocker arm contacting with the first cam and a second end of the first rocker arm being connected to a first valve;an upper housing connected with the slider housing and relatively movable with respect to the slider housing along a second direction vertical to the first direction; anda control portion selectively moving the upper housing.2. The continuous variable valve duration system of claim 1 , wherein a control slot is formed to the upper housing; andwherein the control portion comprises a control shaft, and an eccentric shaft inserted into the ...

Подробнее
Номер записи: 61
12-04-2018 дата публикации

SYSTEM AND METHOD FOR CONTROLLING VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20180100444A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит:

A method for controlling intake and exhaust valves of an engine includes: controlling, by an intake continuous variable valve timing (CVVT) device, opening and closing timings of the intake valve; controlling, by an exhaust CVVT device, opening and closing timing of the exhaust valve; determining, by a controller, a target opening duration of the intake valve and target opening or target closing timings of the intake valve based on an engine load and an engine speed; modifying, by an intake continuous variable valve duration (CVVD) device, current opening and closing timings of the intake valve based on the target opening duration; and advancing or retarding, by the intake CVVD device, the current opening timing of the intake valve while simultaneously retarding or advancing the current closing timing of the intake valve by a predetermined value based on the target opening duration of the intake valve. 1. A method for controlling intake and exhaust valves of an engine , the method comprising:controlling, by an intake continuous variable valve timing (CVVT) device, opening and closing timings of the intake valve;controlling, by an exhaust CVVT device, opening and closing timing of the exhaust valve;determining, by a controller, a target opening duration of the intake valve and at least one of a target opening timing or a target closing timing of the intake valve and the exhaust valve, based on an engine load and an engine speed;modifying, by an intake continuous variable valve duration (CVVD) device, current opening and closing timings of the intake valve based on the target opening duration of the intake valve; andadvancing, by the intake CVVD device, the current opening timing of the intake valve while simultaneously retarding the current closing timing of the intake valve by a predetermined value, or retarding the current opening timing of the intake valve while simultaneously advancing the current closing timing of the intake valve by a predetermined value, based ...

Подробнее
Номер записи: 62
12-04-2018 дата публикации

METHOD FOR CONTROLLING OF VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20180100445A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит:

A method for controlling intake and exhaust valves of an engine includes: controlling, by an intake continuous variable valve timing (CVVT) device and an exhaust CVVT device, opening and closing timings of the intake valve and exhaust valves; determining, by a controller, a target opening duration of the intake and exhaust valves based on an engine load and an engine speed; modifying, by an intake continuous variable valve duration (CVVD) device and by an exhaust two-stage variable valve duration device, current opening and closing timings of the intake valve and exhaust valve based on the target opening durations. In particular, the exhaust two-stage VVD device switches a current opening duration of the exhaust valve to a first exhaust opening duration or a second exhaust opening duration which is shorter than the first opening duration based on the target opening duration of the exhaust valve. 1. A method for controlling intake and exhaust valves of an engine , the method comprising:controlling, by an intake continuous variable valve timing (CVVT) device, opening and closing timings of the intake valve;controlling, by an exhaust CVVT device, opening and closing timing of the exhaust valve;determining, by a controller, a target opening duration of the intake valve, a target opening duration of the exhaust valve, and at least one of a target opening timing or a target closing timing of the intake valve and the exhaust valve, based on an engine load and an engine speed;modifying, by an intake continuous variable valve duration (CVVD) device, current opening and closing timings of the intake valve based on the target opening duration of the intake valve;modifying, by an exhaust two-stage variable valve duration (VVD) device, current opening and closing timings of the exhaust valve based on the target opening duration of the exhaust valve;advancing, by the intake CVVD device, the current opening timing of the intake valve while simultaneously retarding the current ...

Подробнее
Номер записи: 63
12-04-2018 дата публикации

SYSTEM AND METHOD FOR CONTROLLING VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20180100446A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит:

A method for controlling intake and exhaust valves of an engine includes: controlling, by an intake continuous variable valve timing (CVVT) device and an exhaust CVVT device, opening and closing timings of the intake valve and exhaust valves; determining, by a controller, a target opening duration of the intake and exhaust valves based on an engine load and an engine speed; modifying, by an intake continuous variable valve duration (CVVD) device and by an exhaust CVVD device, current opening and closing timings of the intake valve and/or exhaust valve based on the target opening duration; and advancing or retarding, by the intake and/or exhaust CVVD devices, the current opening timing of the intake and exhaust valves while simultaneously retarding or advancing the current closing timing of the intake and exhaust valve by a predetermined value based on the target opening duration. 1. A method for controlling intake and exhaust valves of an engine , the method comprising:controlling, by an intake continuous variable valve timing (CVVT) device, opening and closing timings of the intake valve;controlling, by an exhaust CVVT device, opening and closing timing of the exhaust valve;determining, by a controller, a target opening duration of the intake valve, a target opening duration of the exhaust valve, and at least one of a target opening timing or a target closing timing of the intake valve and the exhaust valve, based on an engine load and an engine speed;modifying, by an intake continuous variable valve duration (CVVD) device, current opening and closing timings of the intake valve based on the target opening duration of the intake valve;modifying, by an exhaust CVVD device, current opening and closing timings of the exhaust valve based on the target opening duration of the exhaust valve;advancing, by the intake CVVD device, the current opening timing of the intake valve while simultaneously retarding the current closing timing of the intake valve by a predetermined ...

Подробнее
Номер записи: 64
12-04-2018 дата публикации

SYSTEM AND METHOD FOR CONTROLLING VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20180100447A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит:

A method for controlling intake and exhaust valves of an engine may include: determining, by a controller, a target opening duration of the intake and exhaust valves based on an engine load and an engine speed; modifying, by an intake continuous variable valve duration (CVVD) device and by an exhaust CVVD device, current opening and closing timings of the intake valve and/or exhaust valve based on the target opening duration of the valves; and advancing or retarding, by the intake and/or exhaust CVVD devices, the current opening timing of the intake and exhaust valves while simultaneously retarding or advancing the current closing timing of the intake and exhaust valve by a predetermined value based on the target opening duration. 1. A method for controlling intake and exhaust valves of an engine , the method comprising:determining, by a controller, a target opening duration of the intake valve, a target opening duration of the exhaust valve based on an engine load and an engine speed;modifying, by an intake continuous variable valve duration (CVVD) device, current opening and closing timings of the intake valve based on the target opening duration of the intake valve;modifying, by an exhaust CVVD device, current opening and closing timings of the exhaust valve based on the target opening duration of the exhaust valve;advancing, by the intake CVVD device, the current opening timing of the intake valve while simultaneously retarding the current closing timing of the intake valve by a predetermined value, or retarding the current opening timing of the intake valve while simultaneously advancing the current closing timing of the intake valve by a predetermined value, based on the target opening duration of the intake valve; andadvancing, by the exhaust CVVD device, the current opening timing of the exhaust valve while simultaneously retarding the current closing timing of the exhaust valve by a predetermined value, or retarding the current opening timing of the exhaust ...

Подробнее
Номер записи: 65
12-04-2018 дата публикации

METHOD FOR CONTROLLING OF VALVE TIMING OF CONTINUOUS VARIABLE VALVE DURATION ENGINE

Номер: US20180100448A1
Автор: HA Kyoung Pyo, Kwon Kiyoung, RYU In Sang, SON You Sang
Принадлежит:

A method for controlling intake and exhaust valves of an engine may include: determining, by a controller, a target opening duration of the intake and exhaust valves according to a control region determined based on an engine load and an engine speed; modifying, by an intake continuous variable valve duration (CVVD) device and by an exhaust CVVD device, opening and closing timings of the intake valve and exhaust valve based on the target opening duration of the valves; and advancing or retarding, by the intake and/or exhaust CVVD devices, the opening timing of the intake and exhaust valves while simultaneously retarding or advancing the closing timing of the intake and exhaust valve by a predetermined value based on the target opening durations. In particular, the controller classifies five control regions based on the engine load and speed. 1. A method for controlling intake and exhaust valves of an engine , the method comprising:determining, by a controller, a target intake opening duration of the intake valve, a target exhaust opening duration of the exhaust valve based on an engine load and an engine speed;modifying, by an intake continuous variable valve duration (CVVD) device, opening and closing timings of the intake valve based on the target intake opening duration of the intake valve;modifying, by an exhaust CVVD device, opening and closing timings of the exhaust valve based on the target exhaust opening duration of the exhaust valve;advancing, by the intake CVVD device, the opening timing of the intake valve while simultaneously retarding the closing timing of the intake valve by a predetermined value, or retarding the opening timing of the intake valve while simultaneously advancing the closing timing of the intake valve by a predetermined value, based on the target intake opening duration of the intake valve; andadvancing, by the exhaust CVVD device, the opening timing of the exhaust valve while simultaneously retarding the closing timing of the exhaust ...

Подробнее
Номер записи: 66
13-04-2017 дата публикации

SYSTEM AND METHOD FOR VARIABLE ACTUATION OF A VALVE OF AN INTERNAL-COMBUSTION ENGINE, WITH A DEVICE FOR DAMPENING PRESSURE OSCILLATIONS

Номер: US20170101903A1
Автор: DE MICHELE Onofrio, GARGANO Marcello, Mazzarella Carlo, RICCO Raffaele, STUCCHI Sergio
Принадлежит: C.R.F. Societa Consortile per Azioni

A system for variable actuation of an engine valve of an internal-combustion engine includes a master piston and a slave piston, driven by the master piston. A control valve controls a communication of a volume of a pressurized fluid with a lower pressure environment, which is connected to a fluid accumulator, and an electronic control unit controls the electrically operated control valve. A device for dampening pressure oscillations is connected to the volume of pressurized fluid and includes an additional volume adapted for receiving fluid from the volume of pressurized fluid only when, following upon oscillations of the pressure in the volume of pressurized fluid, the pressure exceeds a maximum threshold value, which is higher than a mean pressure value that is set up in the volume of pressurized fluid when the master piston drives the slave piston in normal operating conditions. 1. A system for variable actuation of an engine valve of an internal-combustion engine , comprising:a master piston driven directly or indirectly by a cam of a camshaft of the internal-combustion engine;a slave piston, which drives said engine valve and is hydraulically driven by said master piston, by means of a volume of pressurized fluid interposed between the master piston and the slave piston;an electrically operated control valve, which controls a communication of said volume of pressurized fluid with a lower pressure environment, said lower pressure environment being connected to a fluid accumulator; andan electronic control unit for controlling said electrically operated control valve on the basis of one or more parameters indicating the operating conditions of the engine and/or of the system for variable actuation of the engine valve,wherein a device for dampening pressure oscillations in the volume of pressurized fluid is connected to said volume of pressurized fluid, andsaid oscillation dampening device comprising an additional volume adapted for receiving fluid from said ...

Подробнее
Номер записи: 67
04-04-2019 дата публикации

CONTROL DEVICE FOR MULTI-CYLINDER ENGINE

Номер: US20190101064A1
Автор: EZUMI Keitaro, Hasegawa Tomohiro, HASHIGUCHI Tadasu, Hidaka Masatoshi, INOUE Atsushi, KUMAKURA Kazufumi, KUSUNOKI Tomokuni, Matsumoto Kota, NISHIDA Masami, Sueoka Masanari, TAKAGI Akitomo, Takahashi Toshiaki, TAKEMOTO Kazuhiro
Принадлежит: MAZDA MOTOR CORPORATION

Disclosed is a control device for a multi-cylinder engine having a combustion chamber () to which an intake port () and an exhaust port () are connected. The control device comprises: an intake-side variable valve operating mechanism () for controlling a lift timing of two intake valves () of the intake port (); an exhaust-side variable valve operating mechanism () for controlling a lift timing of an exhaust valve (); and an exhaust-side valve operating mechanism () for driving an exhaust valve () at a fixed timing. The control device is operable, when executing cylinder deactivation in a low engine load and low engine speed operating range, to cause the exhaust-side variable valve operating mechanism () to open the exhaust valve () during downward movement of a piston () in a cylinder () being subjected to the cylinder deactivation. 1. A control device for a multi-cylinder engine , comprising:an intake port;an intake valve provided correspondingly to the intake port;an exhaust port;an exhaust valve provided correspondingly to the exhaust port; anda combustion chamber to which the intake port and the exhaust port are connected,wherein the control device is operable to be able to execute a cylinder deactivation in which a fuel injection is stopped in at least one specific cylinder in the multi-cylinder engine, andwherein, when the cylinder deactivation of the at least one specific cylinder is executed, the control device is operable to suppress a lift of the intake valve of the said cylinder in an intake stroke, and to open the exhaust valve of the said cylinder.2. A control device for a multi-cylinder engine , comprising:a plurality of intake ports;a plurality of intake valves each provided correspondingly to a respective one of the plurality of intake ports;a plurality of exhaust ports;a plurality of exhaust valves each provided correspondingly to a respective one of the plurality of exhaust ports;a combustion chamber to which the plurality of intake ports and the ...

Подробнее
Номер записи: 68
04-04-2019 дата публикации

SYSTEM AND METHOD FOR ENGINE OIL TEMPERATURE ESTIMATION

Номер: US20190101458A1
Автор: Sumer Erol Dogan, Wang Yan
Принадлежит:

Methods and systems are provided for estimating engine oil temperature during conditions when sensors used for engine oil temperature measurement are not functional or not reliable. A null duty cycle of a solenoid spool valve of a variable cam timing mechanism is estimated. Then, a calibrated relationship between the duty cycle, an angular velocity of the associated cam, and the engine oil temperature is used to estimate an engine oil temperature when existing sensors used in the calculation of engine oil temperature calculation become unreliable. 1. An engine method , comprising:adjusting an engine torque actuator based on engine oil temperature estimated by applying an excitation signal, including one of a pulse-width modulated duty cycle, a voltage, and an electrical current, to a solenoid valve of a variable camshaft timing device, and using a mapped relationship, stored in non-volatile memory, relating camshaft solenoid duty cycle and camshaft angular velocity of the device to the engine oil temperature.2. The method of claim 1 , wherein the adjusting is responsive to one of degradation of a sensor used to directly or indirectly measure the engine oil temperature claim 1 , and corruption of the non-volatile memory claim 1 , the non-volatile memory including a keep-alive memory of an engine controller claim 1 , the sensor including one or more of an engine oil temperature sensor coupled to an oil sump claim 1 , an engine coolant temperature sensor claim 1 , an air-charge temperature sensor claim 1 , and a mass air flow sensor.3. The method of claim 1 , wherein the adjusting is responsive to an engine warm start condition.4. The method of claim 1 , wherein the applied duty cycle moves the one of the intake and exhaust cam outside of a hard-stop position.5. The method of claim 1 , wherein estimating engine oil temperature further includes:estimating a null duty cycle of the solenoid of the spool valve via low-pass or Kalman filtering of the applied duty cycle, ...

Подробнее
Номер записи: 69
02-06-2022 дата публикации

ADAPTIVE ANY-FUEL CAMLESS RECIPROCATING ENGINE

Номер: US20220170423A1
Автор: Sinsheimer Peter, Spearrin Raymond Mitchell, Tsao Tsu-Chin
Принадлежит: The Regents of the University of California

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine. 1. An adaptive camless reciprocating engine , the engine comprising:a cylinder housing a reciprocating piston;a valve coupled to the cylinder;at least one electronically-controllable actuator coupled to the valve, the actuator configured to control operation of the valve;a plurality of optical sensors disposed at or near the cylinder and configured to acquire optical data within the cylinder or at a location upstream or downstream from the cylinder; anda controller coupled to the one or more optical sensors and electronically-controllable actuator in a closed control loop;wherein the controller is configured to receive data from the one or more optical sensors and process said data to actively manage actuation of the electronically-controllable actuator according to one or more parameters calculated from the acquired optical data.2. The engine of claim 1 , further comprising:a plurality of electronically-controllable actuators coupled to the controller and one or more corresponding engine components;wherein the engine components are selected from the group consisting of: an intake valve, exhaust valve, spark plug, fuel injector, and variable compression mechanism; andwherein the controller is configured to manage one or more parameters selected from the group consisting of cylinder intake/exhaust valve timing, compression ratio, spark ignition, and fuel injection.3. The engine of claim 1 , wherein the one or more optical sensors are disposed at locations for measurement of a fluid property within a cavity comprising one or more of the cylinder claim 1 , an intake ...

Подробнее
Номер записи: 70
19-04-2018 дата публикации

VARIABLE VALVE TRAIN FOR ENGINE

Номер: US20180106198A1
Автор: Goto Tsuyoshi, Kamoyama Yoshiyuki
Принадлежит:

A variable valve train for an engine is provided that includes a plurality of electric variable valve mechanisms, a single drive circuit used to drive at least two of the plurality of electric variable valve mechanisms, and a controller provided separately from the drive circuit and configured to control the drive circuit. The drive circuit is integrated with at least one of the at least two electric variable valve mechanisms. 1. A variable valve train for an engine , comprising:a plurality of electric variable valve mechanisms;a single drive circuit used to drive at least two of the plurality of electric variable valve mechanisms; anda controller provided separately from the drive circuit and configured to control the drive circuit,wherein the drive circuit is integrated with at least one of the at least two electric variable valve mechanisms.2. The valve train of claim 1 , whereinthe at least two electric variable valve mechanisms include an intake variable valve mechanism that is used to open and close an intake valve, and an exhaust variable valve mechanism that is used to open and close an exhaust valve, andthe drive circuit is integrated with the intake variable valve mechanism.3. The valve train of claim 1 , whereineach of the at least two electric variable valve mechanisms includes a motor and a case accommodating the motor, andthe drive circuit is accommodated inside the case of one of the at least two electric variable valve mechanisms.4. The valve train of claim 1 , whereineach of the at least two electric variable valve mechanisms includes a motor, andthe drive circuit is accommodated inside a common case accommodating all the motors of the at least two electric variable valve mechanisms.5. The valve train of claim 1 , wherein each of the at least two electric variable valve mechanisms changes at least one of (a) opening and/or closing timings and (b) lift of a valve. The present disclosure relates to a variable valve train for an engine, which includes ...

Подробнее
Номер записи: 71
30-04-2015 дата публикации

METHOD FOR CONTROLLING VARIABLE VALVE LIFT APPARATUS AND VARIABLE VALVE LIFT SYSTEM

Номер: US20150114375A1
Автор: KIM Keun Sang, Lee Hyeungwoo, LEE Jang Su, YU Jun
Принадлежит: HYUNDAI MOTOR COMPANY

A method for controlling a variable valve lift apparatus includes: measuring an operation mode switching condition; determining whether the variable valve lift apparatus is in a normal operation condition; controlling the operation of the variable valve lift apparatus depending on a predetermined normal valve lift switching map; determining whether the variable valve lift apparatus is in a mode switching delay or switching disable condition from a high lift mode to a low lift mode or whether the variable valve lift apparatus is in the mode switching delay or switching disable condition from the low lift mode to the high lift mode; controlling the operation of the variable valve lift apparatus depending on a predetermined low oil temperature valve lift switching map; and controlling the operation of the variable valve lift apparatus depending on a predetermined high oil temperature valve lift switching map. 1. A method for controlling a variable valve lift apparatus , comprising:measuring an operation mode switching condition of the variable valve lift apparatus;determining, by a controller, whether the variable valve lift apparatus is in a normal operation condition based on the measured operation mode switching condition;controlling, by the controller, operation of the variable valve lift apparatus based on a predetermined normal valve lift switching map if it is determined that the variable valve lift apparatus satisfies the normal operation condition;determining, by the controller, whether the variable valve lift apparatus is in a mode switching delay or switching disable condition from a high lift mode to a low lift mode or whether the variable valve lift apparatus is in the mode switching delay or switching disable condition from the low lift mode to the high lift mode, if it is determined that the variable valve lift apparatus does not satisfy the normal operation condition;controlling, by the controller, the operation of the variable valve lift apparatus ...

Подробнее
Номер записи: 72
20-04-2017 дата публикации

VARIABLE VALVE DURATION/VARIABLE VALVE LIFT SYSTEM AND ENGINE PROVIDED WITH THE SAME

Номер: US20170107871A1
Автор: KIM Kyung Mo
Принадлежит:

A variable valve duration/variable valve lift system may include a camshaft, a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable, an inner bracket transmitting rotation of the camshaft to the first cam portion, a slider housing into which the inner bracket is rotatably inserted, a first rocker arm having a first end contacting the first cam, a rocker shaft to which the first rocker arm is rotatably connected, a solenoid valve configured to selectively supply hydraulic pressure, a position controller configured to selectively change a position of the slider housing, a first bridge connected to a second end of the first rocker arm and to which a first valve is connected, and a valve lift disposed within the first bridge. 1. A variable valve duration/variable valve lift system , comprising:a camshaft;a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable;an inner bracket transmitting rotation of the camshaft to the first cam portion;a slider housing into which the inner bracket is rotatably inserted;a first rocker arm having a first end contacting the first cam;a rocker shaft to which the first rocker arm is rotatably connected;a solenoid valve configured to selectively supply hydraulic pressure;a position controller configured to selectively change a position of the slider housing according to the selective supplying of the hydraulic pressure from the solenoid valve;a first bridge connected to a second end of the first rocker arm and to which a first valve is connected; anda valve lift disposed within the first bridge for changing valve lift of the first valve according to supplying of the hydraulic pressure from the solenoid valve.2. The variable valve duration/variable valve lift system of claim 1 , whereina control hydraulic line ...

Подробнее
Номер записи: 73
11-04-2019 дата публикации

CONTROL APPARATUS FOR ENGINE

Номер: US20190107061A1
Автор: INOUE Atsushi, Matsumoto Kota, Sueoka Masanari, Urushihara Tomonori
Принадлежит: MAZDA MOTOR CORPORATION

This control apparatus for an engine includes an engine, an injector, a spark plug, an intake electric S-VT, an exhaust electric S-VT, and a controller. The controller outputs a control signal to at least one of the intake electric S-VT and the exhaust electric S-VT so as to perform valve control of opening an intake valve when an exhaust valve is open, and then outputs a control signal to the spark plug at predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition. 1. A control apparatus for an engine , the control apparatus comprising:an engine having a combustion chamber;an injector mounted to the engine, the injector configured to inject fuel;a spark plug disposed so as to face an inside of the combustion chamber;a variable valve mechanism configured to change valve timing of at least one of an intake valve and an exhaust valve; anda controller connected to each of the injector, the spark plug, and the variable valve mechanism, the controller configured to output control signals to the injector, the spark plug, and the variable valve mechanism, whereinthe controller outputs a control signal to the variable valve mechanism so as to perform valve control of opening the intake valve when the exhaust valve is open, and then outputs a control signal to the spark plug at predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition.2. The control apparatus for the engine of claim 1 , whereinwhen performing the valve control, the controller outputs a control signal to the variable valve mechanism such that an overlap period in which the intake valve and the exhaust valve are both open is changed according to load on the engine.3. The control apparatus for the engine of claim 2 , whereinthe controller makes the overlap period longer when load on the engine is high, than that when ...

Подробнее
Номер записи: 74
11-04-2019 дата публикации

STRATEGIES FOR RESONANCE MANAGEMENT

Номер: US20190107065A1
Автор: Stretch Dale A.
Принадлежит: Eaton Intelligent Power Limited

Methods are provided for managing forcing function frequency profiles during operation of a multi-cylinder engine. A first stroke mode for a first cylinder is selected and comprises at least a sequential deactive operation of the opening and the closing of a first intake valve and a first exhaust valve during at least two reciprocations of a first reciprocating piston. The first stroke mode is operated on the first cylinder, a second stroke mode is operated on a second cylinder, and a third stroke mode is operated on the remaining cylinders to meet or exceed a required torque output and to form a first aggregate of forcing function frequency profiles that comprises primary forcing function frequency profiles that are less than or approximate in amplitude and less than or approximate in frequency value to one of the respective baseline of primary forcing function frequency profiles. 1. A method for managing forcing function frequency profiles during operation of a multi-cylinder engine , each cylinder of the engine comprising a respective variable cylinder torque output which provides a corresponding forcing function frequency profile , the engine comprising a variable aggregate torque output comprising the sum of the cylinder torque outputs of each of the cylinders and comprising the sum of the forcing function frequency profiles of each of the cylinders , and the engine comprising a respective baseline aggregate torque output for each nonzero reciprocation speed of a reciprocating piston assembly coupled to the cylinders , wherein each respective baseline aggregate torque output provides a respective baseline of primary forcing function frequency profiles , and wherein the respective baseline aggregate torque output corresponds to active operation modes for each cylinder , where active operation modes comprise sequential actuation of an intake valve , a fuel injector , and an exhaust valve for each cylinder , the method comprising:selecting a first stroke mode for ...

Подробнее
Номер записи: 75
28-04-2016 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20160115876A1
Автор: Hoshi Koichi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An internal combustion engine includes a piston, a plurality of intake valves, an exhaust valve, a valve drive unit, an intake valve halting unit, an injector, and an ECU. The ECU configured to: (a) control the valve drive unit so as to close the exhaust valve on an advance side of the exhaust top-dead-center of the piston, when an engine temperature is lower than a prescribed value; (b) control the intake valve halting unit so as to halt the operation of the portion of intake valves in a closed state, when the engine temperature is lower than the prescribed value; and (c) control the valve control unit so as to form a negative overlap between the exhaust valve and the intake valve other than the portion of intake valves, among the plurality of intake valves, when the engine temperature is lower than the prescribed value. 1. An internal combustion engine , comprising:a piston configured to be adjacent to a combustion chamber of the internal combustion engine;a plurality of intake valves configured to independently open and close a plurality of intake passages communicating with the combustion chamber;an exhaust valve configured to open and close an exhaust passage communicating with the combustion chamber;a valve drive unit configured to change at least a valve closing time of the exhaust valve, of valve characteristics of the plurality of intake valves and the exhaust valve;an intake valve halting unit configured to halt operation of a portion of intake valves, among the plurality of intake valves, in a closed state;an injector configured to inject fuel into at least an intake passage, other than the intake passages opened and closed by the portion of intake valves, among the plurality of intake passages; andan ECU configured to:(a) control the valve drive unit so as to close the exhaust valve on an advance side of an exhaust top-dead-center of the piston, when an engine temperature is lower than a prescribed value;(b) control the intake valve halting unit so as to ...

Подробнее
Номер записи: 76
09-06-2022 дата публикации

METHODS AND SYSTEMS FOR ENGINE BRAKING WITH REDUCED NOISE, VIBRATION, AND HARSHNESS

Номер: US20220178314A1
Автор: Martin Douglas
Принадлежит:

Methods and systems are provided for engine braking in a vehicle. In one example, a method may include, in response to an engine braking request: deactivating fueling to at least one engine cylinder, decreasing an effective flow area of a turbine inlet of a variable geometry turbocharger (VGT), and adjusting an intake valve of the at least one engine cylinder based on a requested braking torque of the engine braking request and the effective flow area of the turbine inlet. In this way, increased exhaust backpressure may be generated to increase engine pumping losses while the intake valve adjustment increases in-cylinder pumping losses, thereby increasing an amount of engine braking torque. 1. A method , comprising:responsive to an engine braking request:deactivating fueling to at least one cylinder of an engine;decreasing an effective flow area of a turbine inlet of a variable geometry turbocharger (VGT); andadjusting an intake valve of the at least one cylinder based on a requested braking torque of the engine braking request and the effective flow area of the turbine inlet, including determining an amount of braking torque generated by decreasing the effective flow area of the turbine inlet, and further closing the intake valve as a difference between the determined amount of braking torque generated by decreasing the effective flow area of the turbine inlet and the requested braking torque of the engine braking request increases.2. The method of claim 1 , wherein adjusting the intake valve of the at least one cylinder based on the requested braking torque of the engine braking request and the effective flow area of the turbine inlet comprises further closing the intake valve of the at least one cylinder as the requested braking torque of the engine braking request increases.3. The method of claim 2 , wherein further closing the intake valve comprises decreasing a hydraulic pressure in a continuously variable valve lift mechanism hydraulically coupled to the ...

Подробнее
Номер записи: 77
18-04-2019 дата публикации

CONTROL APPARATUS FOR ENGINE

Номер: US20190112988A1
Автор: INOUE Atsushi, Matsumoto Kota, Sueoka Masanari, Urushihara Tomonori
Принадлежит:

This control apparatus of an engine includes an engine, a state quantity setting device, an injector, a spark plug, and a controller. The controller outputs a control signal to the spark plug at a predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition, and the controller advances an ignition timing when the temperature before start of compression in a combustion chamber is to be reduced. 1. A control apparatus for an engine , the control apparatus comprising:an engine having a combustion chamber;a state quantity setting device mounted to the engine, the state quantity setting device configured to adjust introduction of fresh air and burned gas into the combustion chamber;an injector mounted to the engine, the injector configured to inject fuel;a spark plug disposed so as to face an inside of the combustion chamber; anda controller connected to each of the state quantity setting device, the injector, and the spark plug, the controller configured to output control signals to the state quantity setting device, the injector, and the spark plug, whereinthe controller outputs a control signal to the spark plug at predetermined ignition timing such that, after air-fuel mixture is ignited and combustion is started, unburned air-fuel mixture is combusted by autoignition, andwhen a control amount regarding a temperature before start of compression in the combustion chamber is to be changed such that the temperature is reduced by the controller outputting a control signal to the state quantity setting device, the controller advances the ignition timing as compared to that when the temperature is not reduced.2. The control apparatus for the engine of claim 1 , whereinwhen load on the engine is high, the controller changes the control amount such that the temperature is reduced as compared to that when the load is low, by the controller outputting a control signal to the state ...

Подробнее
Номер записи: 78
24-07-2014 дата публикации

CONTROLLING CYLINDER USAGE DURING REDUCED LOAD ON AN INTERNAL COMBUSTION PROPULSION ENGINE

Номер: US20140202422A1
Автор: Cattani Luis Carlos, Ricart-Ugaz Laura M, Xin Qianfan
Принадлежит: International Engine Intellectual Property Company, LLC

While an engine is miming with all engine cylinders being fueled, a historical record of engine output torque and engine speed is compiled. When the historical record discloses a change in engine operation from a relatively greater output torque and engine speed to a relatively lesser output torque and speed, fueling of at least one engine cylinder ceases while engine output torque and engine speed remain substantially unchanged at the relatively lesser output torque and speed by continuing fueling of other engine cylinders and by causing at least one mechanism to control the timing of operation of cylinder intake and exhaust valves of the at least one engine cylinder to substantially minimize pumping loss attributable to the at least one engine cylinder. 1. An internal combustion engine which comprises:engine structure forming multiple engine cylinders;an intake system for conveying air to an intake manifold which serves at least one engine cylinder;one or more cylinder intake valves for controlling admission of air from the intake manifold into a respective engine cylinder served by the intake manifold;a fueling system for introducing fuel into the engine cylinders for combustion with air in the engine cylinders to operate the engine;one or more cylinder exhaust valves for controlling admission of exhaust created by combustion in a respective engine cylinder from a respective engine cylinder into an exhaust manifold serving at least one engine cylinder;at least one mechanism for varying timing of operation of at least some of the cylinder valves in a group of cylinder valves comprising the one or more cylinder intake valves and the one or more cylinder exhaust valves during engine cycles;and a controller which, when the engine is miming with all engine cylinders being fueled, compiles a historical record of engine output torque and engine speed, and which, when the historical record discloses a change in engine operation from a relatively greater output torque and ...

Подробнее
Номер записи: 79
07-05-2015 дата публикации

ENGINE RESPONSE ADJUSTMENT

Номер: US20150127241A1
Автор: Hodorek Craig Thomas, Szwabowski Steven Joseph
Принадлежит:

Methods and systems are provided for adjusting an engine output delivered in response to an operator pedal actuation based at least on a grade of vehicle travel. During uphill travel, in the presence of headwinds, and/or in the presence of a vehicle payload, the output may be increased while during downhill travel or in the presence of tailwinds, the output may be decreased. In this way, driver fatigue during travel over varying elevations, varying ambient conditions, and varying loads can be reduced. 1. A method for controlling a vehicle engine , comprisingdetermining a grade of vehicle travel and a wind amount; andduring non-slipping and non-cruise vehicle conditions, adjusting a relationship between an operator accelerator pedal depression amount and an engine output torque based on the determined grade of vehicle travel and the wind amount.2. The method of wherein the relationship is adjusted based on whether the wind amount is a headwind or a tailwind.3. The method of wherein the relationship is adjusted based on a wind speed.4. The method of wherein a gain of the relationship is adjusted based on the wind speed.5. The method of claim 4 , further comprising adjusting engine output torque based on the adjusted relationship claim 4 , wherein the adjusting includes varying the relationship to have a larger gain between operator accelerator pedal depression amount and engine output torque during an uphill travel claim 4 , and a smaller gain between operator pedal depression amount and engine output torque during a downhill travel.6. The method of claim 5 , wherein the gain is increased as an uphill grade increases claim 5 , and wherein the gain is decreased as a downhill grade of travel increases.7. The method of claim 1 , wherein the adjusting includes claim 1 ,increasing the engine output torque at a lower rate when an operator pedal is depressed at a lower elevation; andincreasing the engine output torque at a higher rate when the operator pedal is depressed at ...

Подробнее
Номер записи: 80
14-05-2015 дата публикации

Method and apparatus for controlling operation of an internal combustion engine operating in hcci combustion mode

Номер: US20150128909A1
Автор: Chen-Fang Chang, Hanho Yun, Jun-Mo Kang, Orgun A. Guralp, Paul M. Najt, Sal S.V. Rajagopalan, Yongjie Zhu
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine is configured to operate in a homogeneous-charge compression-ignition combustion mode. A method for operating the internal combustion engine includes determining a desired effective charge dilution for a cylinder charge for a cylinder firing event. A desired air/fuel ratio, a desired intake air mass and a desired intake oxygen are determined to achieve the desired effective charge dilution for a combustion event. The desired air/fuel ratio is adjusted based upon a difference between the desired intake oxygen and the actual intake oxygen, and engine operation is controlled to achieve the adjusted desired air/fuel ratio.

Подробнее
Номер записи: 81
04-05-2017 дата публикации

METHOD AND DEVICE FOR ADAPTING A VALVE ACTUATING VARIABLE FOR AN INTAKE AND/OR EXHAUST VALVE OF AN INTERNAL COMBUSTION ENGINE

Номер: US20170122223A1
Автор: Heinkele Matthias, Kaisser Alexander
Принадлежит:

A method for adapting a valve actuating variable for controlling an intake and/or an exhaust valve of an internal combustion engine, including setting a predetermined operating state of the internal combustion engine; determining a charge specification, which specifies an instantaneous air charge in one of the cylinders of the internal combustion engine, in the predetermined operating state; and adapting the valve actuating variable as a function of the charge specification. 1. A method for adapting a valve actuating variable for controlling an intake and/or exhaust valve of an internal combustion engine , the method comprising:setting a predetermined operating state of the internal combustion engine;determining a charge specification, which specifies an instantaneous air charge in one of the cylinders of the internal combustion engine, in the predetermined operating state; andadapting the valve actuating variable as a function of the charge specification.2. The method as recited in claim 1 , wherein one of: i) an intake manifold pressure in an intake manifold of the internal combustion engine situated upstream from the intake valve claim 1 , or ii) a combustion chamber pressure in a combustion chamber of one of the cylinders of the internal combustion engine is determined as a charge specification.3. The method as recited in claim 1 , wherein the adaptation of the valve actuating variable is carried out as a function of a difference between the charge specification and a reference charge specification dependent on the predetermined operating state.4. The method as recited in claim 1 , wherein the adaptation of the valve actuating variable is carried out as a function of a charge specification difference as the difference between a first charge specification detected in a first operating state and a second charge specification detected in a second operating state.5. The method as recited in claim 4 , wherein the adaptation of the valve actuating variable is carried ...

Подробнее
Номер записи: 82
25-08-2022 дата публикации

VALVETRAIN WITH VARIABLE VALVE ACTUATION

Номер: US20220268182A1
Автор: JR. James E., McCarthy, Yankovic Eric
Принадлежит: Eaton Intelligent Power Limited

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 146-. (canceled)47. A method of providing a rocker arm set for a valvetrain having a plurality of cylinders , the method comprising:providing a first intake rocker arm for a first intake valve on a first cylinder of the plurality of cylinders;providing a second intake rocker arm configured as a switching rocker arm for a second intake valve on the first cylinder, the second intake rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode;providing a first exhaust rocker arm configured as a switching rocker arm for a first exhaust valve on a second cylinder of the plurality of cylinders, the first exhaust rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode; andproviding a second exhaust rocker arm for a second exhaust valve on the second cylinder.48. The method of claim 47 , wherein the first intake rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.49. The method of claim 48 , wherein the second exhaust rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.50. The method of claim 47 , wherein the added motion mode of the second intake rocker arm is one of a late ...

Подробнее
Номер записи: 83
25-08-2022 дата публикации

A CONTROLLER AND A METHOD FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE

Номер: US20220268226A1
Автор: Hill James
Принадлежит:

Aspects of the present invention relate to a controller for controlling operation of an internal combustion engine, a control system, an internal combustion engine, a vehicle, a method and a non-transitory computer readable medium. The controller is configured to, during fuel cut, cause opening of an intake valve of a cylinder of the internal combustion engine to enable air having a mass to enter the cylinder. The mass is below a first range of masses which enable the internal combustion engine to provide combustion torque. 115-. (canceled)16. A controller for controlling operation of an internal combustion engine , the controller being configured to:during fuel cut, cause opening of an intake valve of a cylinder of the internal combustion engine to enable air having a mass to enter the cylinder; whereinthe mass is below a first range of masses which enable the internal combustion engine to provide combustion torque.17. The controller according to claim 16 , comprisingan electronic processor having an electrical input for receiving a request signal; andan electronic memory device electrically coupled to the electronic processor and having instructions stored therein,the processor being configured to access the memory device and execute the instructions stored therein.18. The controller according to claim 16 , wherein the controller is configured to cause opening of the intake valve to enable a mass of air in the first range of masses to enter the cylinder during all intake strokes of the cylinder in which fuel is combusted during a next power stroke of the cylinder.19. The controller according to claim 16 , whereinduring fuel cut, the controller is configured to cause opening of the intake valve during each intake stroke of the cylinder to enable a mass of air in a second range of masses to enter the cylinder during each intake stroke; anda largest mass in the second range of masses is smaller than a smallest mass in the first range of masses.20. The controller ...

Подробнее
Номер записи: 84
10-05-2018 дата публикации

METHOD FOR SWITCHING, IN AN EFFICIENCY-OPTIMIZED MANNER, A FOUR-STROKE INTERNAL COMBUSTION ENGINE INCLUDING A PLURALITY OF CYLINDERS AND A FULLY VARIABLE VALVE TRAIN BETWEEN A FULL CYLINDER OPERATION AND A PARTIAL CYLINDER OPERATION

Номер: US20180128190A1
Автор: Grajewski Volker, Heins Sebastian
Принадлежит:

A method for operating a four-stroke internal combustion engine is provided. The internal combustion engine can be switched over between a full cylinder operation and a partial cylinder operation. The valve lift of the inlet valves of all cylinders are set temporarily to a maximum lift during the switchover between full cylinder operation and partial cylinder operation, wherein, during the switchover, in a step a), in an early switchover phase, the valve lift is increased at all cylinders and, at the same time, the time of the maximum valve lift is adjusted in the early direction by means of a phase adjuster and/or, in a step b), in a late switchover phase, the valve lift is reduced at least at the cylinders which are to continue to run after the switchover and, at the same time, the time of the maximum valve lift is adjusted in the late direction. 1. A method for operating an internal combustion engine , the method comprising:providing a four-stroke internal combustion engine having a plurality of cylinders, a fully variable valve train, and at least one phase adjuster for changing a time of a maximum valve lift of inlet valves, wherein the four-stroke internal combustion engine is configured so as to be capable of being switched over between a full cylinder operation and a partial cylinder operation, wherein at least one of the cylinders is switched off in the partial cylinder operation and, to this end, valves of the at least one cylinder are moved into a zero lift position and remaining ones of the cylinders continue to run;setting a valve lift of the inlet valves of all of the cylinders temporarily to a maximum lift during a switchover between the full cylinder operation and the partial cylinder operation; andperforming at least one of step a) and step b) during the switchover of the four-stroke internal combustion engine between the full cylinder operation and the partial cylinder operation, wherein in step a), in an early switchover phase, the valve lift is ...

Подробнее
Номер записи: 85
10-05-2018 дата публикации

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20180128192A1
Автор: Sugiyama Satoshi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An internal combustion engine includes a throttle valve, an EGR passage, an EGR valve, a valve mechanism that adjusts opening and closing characteristics of an intake valve or an exhaust valve of the internal combustion engine, and a controller that controls the throttle valve, the EGR valve and the valve mechanism, based on request torque that is requested of the internal combustion engine. The controller is configured to execute evacuation traveling control that operates the throttle valve to fully open, calculates a target intake air flow amount for achieving the request torque based on an effective opening area of the EGR valve which is stuck, and operates the valve mechanism in accordance with the target intake air flow amount, in at least one time period while the request torque is reducing when the EGR valve is stuck in an open state. 1. A control apparatus for an internal combustion engine , comprising:a throttle valve installed in an intake passage of an internal combustion engine;an EGR passage that connects an exhaust passage of the internal combustion engine, and an intake downstream side of the throttle valve in the intake passage;an EGR valve that is installed in a middle of the EGR passage, and adjusts an effective opening area of the EGR passage;a valve mechanism that adjusts opening and closing characteristics of an intake valve or an exhaust valve of the internal combustion engine; anda controller that controls the throttle valve and the valve mechanism, based on request torque that is requested of the internal combustion engine,wherein the controlleris configured to execute evacuation traveling control that operates the throttle valve to fully open, calculates a target intake air flow amount that is a target value of an intake air flow amount for achieving the request torque based on the effective opening area in a case of the EGR valve being stuck in an open state, and operates the valve mechanism in accordance with the target intake air flow ...

Подробнее
Номер записи: 86
23-04-2020 дата публикации

SYSTEMS AND METHODS FOR REDUCING ENGINE COMPRESSION TORQUE

Номер: US20200122709A1
Автор: Boyer Brad, Cole William Cary, Cunningham Ralph Wayne, Pursifull Ross Dykstra, Ulrey Joseph
Принадлежит:

Methods and systems are provided for reducing engine compression torque when an engine having a split exhaust system is spun unfueled. In one example, a method may include maintaining closed a blowdown exhaust valve of a cylinder, the blowdown exhaust valve coupled to a first exhaust manifold that directs gases from the cylinder to a catalyst, and opening a scavenge exhaust valve of the cylinder, the scavenge exhaust valve coupled to a second exhaust manifold that directs gases from the cylinder to an exhaust gas recirculation system. In this way, compression of gases within they cylinder is reduced while gas flow to the catalyst is prevented. 1. A method , comprising:while rotating an engine unfueled at a non-zero speed, maintaining closed a first exhaust valve of a cylinder, the first exhaust valve coupled to a blowdown exhaust manifold coupled to an exhaust passage, and increasing an open duration of a second exhaust valve of the cylinder, the second exhaust valve coupled to a scavenge manifold coupled to an intake passage.2. The method of claim 1 , wherein increasing the open duration of the second exhaust valve includes maintaining open the second exhaust valve while intake valves of the cylinder are closed.3. The method of claim 1 , wherein increasing the open duration of the second exhaust valve includes maintaining open the second exhaust valve throughout an entire engine cycle.4. The method of claim 1 , wherein increasing the open duration of the second exhaust valve includes opening the second exhaust valve during at least a compression stroke and an exhaust stroke of the cylinder.5. The method of claim 1 , wherein the engine is included in a powertrain claim 1 , and the engine is mechanically coupled to vehicle wheels via a transmission while rotating the engine unfueled at the non-zero speed.6. The method of claim 5 , wherein the engine is rotationally coupled to an electric machine and the engine and the electric machine are not mechanically decouplable ...

Подробнее
Номер записи: 87
07-08-2014 дата публикации

Control unit for internal combustion engine

Номер: US20140216414A1
Автор: Fumiaki Hiraishi, Kiyotaka Hosono, Takashi Kawabe
Принадлежит: Mitsubishi Motors Corp

A control unit for an internal combustion engine includes a load detector to detect a load on the engine, an injection volume calculator to calculate a cylinder injection volume indicating a volume of fuel injected from a direct injector, a first controller to perform a first control for increasing the frequency of the injection by the direct injector upon a reduction in the cylinder injection volume, a second controller to perform a second control for increasing a port injection volume indicating a volume of fuel injected from a port injector upon a reduction in the cylinder injection volume, and a switching controller to switch between the first control with the first controller and the second control with the second controller depending on the load.

Подробнее
Номер записи: 88
17-05-2018 дата публикации

METHOD AND APPARATUS FOR CONTROLLING ENGINE SYSTEM

Номер: US20180135537A1
Автор: Kim Seungbum
Принадлежит:

A method of and an apparatus for controlling an engine system having a continuous variable valve duration (CVVD) apparatus and an exhaust gas recirculation (EGR) apparatus may include: determining whether an EGR valve of the EGR apparatus is opened; determining an amount of an external EGR gas according to opening of the EGR valve and an amount of an internal EGR gas according to operation of the CVVD apparatus when the EGR valve is opened; comparing a value obtained by summing the amount of the external EGR gas and the amount of the internal EGR gas with an EGR limit value; and decreasing a duration of an intake valve when the value obtained by summing the amount of the external EGR gas and the amount of the internal EGR gas is greater than the EGR limit value. 1. A method of controlling an engine system including a continuous variable valve duration (CVVD) apparatus and an exhaust gas recirculation (EGR) apparatus , the method comprising:determining whether an EGR valve of the EGR apparatus is open;determining an amount of an external EGR gas according to opening of the EGR valve and an amount of an internal EGR gas according to operation of the CVVD apparatus when the EGR valve is open;comparing a value obtained by summing the amount of the external EGR gas and the amount of the internal EGR gas with an EGR limit value; anddecreasing a duration of an intake valve when the value obtained by summing the amount of the external EGR gas and the amount of the internal EGR gas is greater than the EGR limit value.2. The method of claim 1 , wherein the amount of the external EGR gas is determined based on a pressure difference between a front end portion and a rear end portion of the EGR valve and an opening amount of the EGR valve.3. The method of claim 1 , wherein the internal EGR gas is determined based on a difference between an intake pressure and an exhaust pressure and a valve overlap between the intake valve and an exhaust valve.4. The method of claim 1 , further ...

Подробнее
Номер записи: 89
17-05-2018 дата публикации

SPARK IGNITION ENGINE CONTROL WITH EXHAUST MANIFOLD PRESSURE SENSOR

Номер: US20180135541A1
Автор: Booth Richard A., HSIEH MING-FENG, Kitchen Andrew G., Sun Jisang, Thomas Robert J., Zhong Jinghua, zu Loye Axel Otto
Принадлежит:

Control of a spark ignited internal combustion in response to an exhaust manifold pressure measurement of an engine is disclosed. An engine out NOx amount for at least one cylinder is determined at least in part in response to the exhaust manifold pressure measurement and a brake mean effective pressure of the at least one cylinder. An operating condition of the engine is adjusted in response to the engine out NOx amount. 1. A method , comprising:operating an internal combustion engine system including an intake system connected to an engine with a plurality of cylinders and at least one fuel source operably connected to the internal combustion engine system to provide a flow of fuel to each of the plurality of cylinders, wherein the intake system is coupled to each of the plurality of cylinders to provide a charge flow from the intake system to a combustion chamber of the respective cylinder, the internal combustion engine system further including an exhaust system including an exhaust manifold;determining a pressure in the exhaust manifold during a combustion cycle associated with at least one of the plurality of cylinders;determining a brake mean effective pressure (BMEP) in the exhaust manifold during the combustion cycle of the at least one of the plurality of cylinders;determining an engine out NOx amount for the at least one cylinder in response to the pressure in the exhaust manifold and the BMEP; andadjusting an operating condition of the at least one engine in response to the engine out NOx amount.2. The method of claim 1 , further comprising:determining a gross indicated mean effective pressure (GIMEP) of the at least one of the plurality of cylinders in response to the pressure in the exhaust manifold and the BMEP of the at least one cylinder; anddetermining the engine out NOx amount for the at least one cylinder in response to the GIMEP.3. The method of claim 2 , wherein the GIMEP is determined in response to a sum of a pumping mean effective pressure ( ...

Подробнее
Номер записи: 90
08-09-2022 дата публикации

METHOD FOR VERIFYING CVVD LOCATION LEARNING RESULT AND CVVD SYSTEM THEREOF

Номер: US20220282646A1
Автор: KOO Bon-Chang
Принадлежит:

A continuously variable valve duration (CVVD) system includes a controller configured to determine whether a learning value existing in the CVVD system is required to be verified during one of a hardware abnormality, a learning value abnormality, and a motor voltage abnormality. In particular, the controller performs a learning value verification control using a rotation detection value and switches from a learning value verification control to a re-learning control when re-learning is required. 1. A continuously variable valve duration (CVVD) system , comprising: a controller configured to determine whether a learning value existing in the CVVD system is required to be verified during one of a hardware abnormality , a learning value abnormality , and a motor voltage abnormality; and to perform a learning value verification control using a rotation detection value; and to switch from a learning value verification control to a re-learning control when re-learning is required.2. The CVVD system of claim 1 , comprising an auxiliary cam sensor and a cam sensor claim 1 , the cam sensor being provided at an end portion of the cam shaft claim 1 , and the auxiliary cam sensor being positioned at a middle portion of the cam shaft.3. The CVVD system of claim 2 , wherein the auxiliary cam sensor generates a rotation detection value of the cam shaft by an A protrusion and a B protrusion of an auxiliary target wheel provided at a middle portion of the cam shaft.4. The CVVD system of claim 1 , wherein the controller includes a CVVD learning verification map claim 1 , the CVVD learning map being configured to provide a signal indicating whether a hardware abnormality claim 1 , a learning value abnormality claim 1 , or a motor voltage abnormality is present in the CVVD system.5. The CVVD system of claim 1 , wherein the controller controls a continuously variable valve timing (CVVT) system to directly control the cam shaft. This application is a divisional application of non- ...

Подробнее
Номер записи: 91
08-09-2022 дата публикации

Engine

Номер: US20220282674A1
Автор: Mitsunori Wasada, Naohiro Yamaguchi, Satoshi Imamura, Toshimasa KOTANI
Принадлежит: Mazda Motor Corp

An engine is provided, which includes an engine body including a cylinder provided with intake and exhaust ports and intake and exhaust valves, intake and exhaust passages, a turbocharger including a turbine provided to the exhaust passage and a compressor provided to the intake passage, and a variable phase mechanism configured to change open/close timings of the intake valve while maintaining an open period of the intake valve at a 270° C.A or larger. A geometric compression ratio of the cylinder is 11:1 or higher. In a high-load range, the variable phase mechanism sets the intake valve close timing to be after an intake BDC and to make a ratio of a retarded amount of the intake closing to the geometric compression ratio be 4.58 or above and 6.67 or below, and sets the intake valve open timing to be before a close timing of the exhaust valve.

Подробнее
Номер записи: 92
30-04-2020 дата публикации

ROCKER ARM FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20200131946A1
Автор: Persson Per
Принадлежит: VOLVO TRUCK CORPORATION

The present invention relates to a rocker arm () for an internal combustion engine (). The rocker arm () comprises a cavity () with a cavity wall () at least partially accommodating a lash adjustment piston () for hydraulic lash adjustment. The rocker arm () further comprises a lash stop surface (). At least a portion of the lash adjustment piston () is adapted to abut the lash stop surface () during at least one operating condition of the rocker arm (). The cavity () comprises a lash adjustment chamber () at least partially delimited by the lash adjustment piston (). The rocker arm () further comprising a control fluid conduit () and a valve assembly () located between the lash adjustment chamber () and the control fluid conduit (), as seen in an intended direction of flow from the control fluid conduit () to the lash adjustment chamber (). 116121641424416464446164150441652545052525054. A rocker arm () for an internal combustion engine () , said rocker arm () comprising a cavity () with a cavity wall () at least partially accommodating a lash adjustment piston () for hydraulic lash adjustment , said rocker arm () further comprising a lash stop surface () , at least a portion of said lash adjustment piston () being adapted to abut said lash stop surface () during at least one operating condition of said rocker arm () , said cavity () comprising a lash adjustment chamber () at least partially delimited by said lash adjustment piston () , said rocker arm () further comprising a control fluid conduit () and a valve assembly () located between said lash adjustment chamber () and said control fluid conduit () , as seen in an intended direction of flow from said control fluid conduit () to said lash adjustment chamber () , said valve assembly () being such that:{'sub': 1', '1, 'b': 52', '44', '42', '46, 'for a first fluid pressure range (ΔP) wherein a fluid pressure in said control fluid conduit () is equal to or lower than a first predetermined threshold pressure level ( ...

Подробнее
Номер записи: 93
30-04-2020 дата публикации

DEVICE AND METHOD FOR CONTROLLING ENGINE

Номер: US20200132001A1
Автор: HASHIMOTO Masanori, Nishimoto Toshiaki, Nishio Takafumi, Yamamoto Takahiro
Принадлежит: MAZDA MOTOR CORPORATION

A controller increases an actual oil pressure up to a transient oil pressure (an actuating oil pressure) and then supplies oil adjusted to have the transient oil pressure (the actuating oil pressure) to valve stopping mechanisms to actuate the valve stopping mechanisms. The controller, when actuating the valve stopping mechanisms, starts increase in an intake filling amount when the actual oil pressure increases up to a predetermined determination value set at the transient oil pressure (the actuating oil pressure) or lower. 1. A device for controlling an engine including a plurality of cylinders and switching between all-cylinder operation , in which all the cylinders are operated , and deactivated cylinder operation , in which some of the cylinders are deactivated , the device comprising:a valve stopping mechanism configured to actuate to switch the engine from the all-cylinder operation to the deactivated cylinder operation when oil pressurized up to a predetermined actuating oil pressure is supplied;an oil supply device configured to discharge oil to a hydraulic passage connected to the valve stopping mechanism and to adjust an oil pressure of the oil;a control valve configured to supply oil from the hydraulic passage to the valve stopping mechanism;a filling amount adjusting device configured to adjust an intake filling amount indicating an amount of gas to be supplied to each of the cylinders;a controller connected to the oil supply device, the control valve, and the filling amount adjusting device and configured to output a control signal to each of the oil supply device, the control valve, and the filling amount adjusting device to operate the engine; andan oil pressure sensor connected to the controller, and configured to detect an oil pressure of oil flowing through the hydraulic passage and to output a signal indicating a detection result to the controller,the controller outputting a control signal to the oil supply device to increase the oil pressure ...

Подробнее
Номер записи: 94
30-04-2020 дата публикации

INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING SUCH AN INTERNAL COMBUSTION ENGINE

Номер: US20200132003A1
Автор: CARLSON Urban, Höglund Anders
Принадлежит:

An internal combustion engine includes combustion chambers, each having a first intake port, and first and second exhaust ports. An intake manifold is connected to the first intake port of each combustion chamber, a main pressure booster upstream of the intake manifold. An exhaust discharge arrangement includes a main exhaust manifold connected to the first exhaust port of each combustion chamber, the exhaust discharge arrangement connected to the second exhaust port of a first subset combustion chambers, and an exhaust recirculation manifold connected to the second exhaust port of a second subset combustion chambers and connected to an upstream side of the main pressure booster. The engine operates in high load and low load modes, which vary how the engine evacuates the exhaust gas of the second subset combustion chambers to the exhaust recirculation manifold. A related method is also disclosed. 1122. An internal combustion engine () comprising a set of combustion chambers () , each combustion chamber () being provided with:{'b': 4', '5, 'a first controllable intake valve () configured for opening and closing a first intake port (),'}{'b': 6', '7, 'a first controllable exhaust valve () configured for opening and closing a first exhaust port (), and'}{'b': 8', '9', '1, 'a second controllable exhaust valve () configured for opening and closing a second exhaust port (), the internal combustion engine () further comprising{'b': 14', '5', '2, 'an intake manifold () connected to the first intake port () of each combustion chamber of said set of combustion chambers (),'}{'b': 15', '14', '14, 'a main pressure booster () arranged upstream said intake manifold () for providing gas to the intake manifold (),'}{'b': 17', '7', '2', '9, 'an exhaust discharge arrangement comprising a main exhaust manifold () connected to the first exhaust port () of each combustion chamber of said set of combustion chambers (), the exhaust discharge arrangement being connected to the second ...

Подробнее
Номер записи: 95
04-06-2015 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20150152793A1
Автор: Fujiwara Takahiko, Matsuda Kazuhisa, Morita Kouji, Tsukagoshi Takahiro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An engine includes variable valve mechanisms and a variable compression ratio mechanism. An ECU executes temperature balance control when a fuel-cut operation is executed. In the temperature balance control, valve opening characteristics of an exhaust valve are controlled based on a magnitude relation between an actual catalyst temperature and a target catalyst temperature and a magnitude relation between a water temperature and a required cylinder wall temperature. When executing a fuel-cut operation, it is thereby possible to control both the actual catalyst temperature and the water temperature in a well-balanced manner so that the actual catalyst temperature falls within a temperature range suitable for operation of the catalysts, and the water temperature becomes close to the required cylinder wall temperature. 1. A control device for an internal combustion engine , comprising:an exhaust purification catalyst that purifies exhaust gas that is discharged from a cylinder of the internal combustion engine;an exhaust valve timing varying mechanism for variably setting valve opening characteristics of an exhaust valve;catalyst temperature acquisition unit for detecting or estimating a temperature of the exhaust purification catalyst as an actual catalyst temperature;target catalyst temperature setting unit for setting a catalyst temperature that is suitable for operation of the exhaust purification catalyst as a target catalyst temperature;cylinder wall temperature detection unit for detecting a cylinder wall temperature that is a wall surface temperature of the cylinder;required cylinder wall temperature calculation unit for calculating a cylinder wall temperature that is required when reverting from a fuel-cut operation as a required cylinder wall temperature; andtemperature balance control unit for controlling the valve opening characteristics of the exhaust valve by means of the exhaust valve timing varying mechanism based on a magnitude relation between the ...

Подробнее
Номер записи: 96
25-05-2017 дата публикации

Variable valve train with a rocker arm

Номер: US20170145876A1
Автор: Hai-Son Pham
Принадлежит: MAN Truck and Bus SE

A variable valve train for gas exchange lifting valve of an internal combustion engine. The valve can be moved between open and closed positions periodically by way of a cam via a rocker arm. The variable valve train includes a camshaft having at least first and second cams which are arranged offset in the longitudinal direction of the camshaft. The first and second cams having cam contours. The valve train includes a rocker arm mounted which pivots about a rocker arm axis and is assigned to the at least one first cam via a pressure roller at its camshaft-side end and is connected to at least one lifting valve at its valve-side end, and a roller lever which is assigned to the at least one second cam at its camshaft-side end and is articulated at its other end on the rocker arm and pivots about the rocker arm axis.

Подробнее
Номер записи: 97
16-05-2019 дата публикации

System and method for mitigating wet-fouling of spark plugs

Номер: US20190145331A1
Автор: Aed M. Dudar
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for mitigating spark plug wet-fouling in an engine system. In one example, a method may include, after spark plug wet-fouling has been detected prior to an engine start, selecting between drying one or more of the wet-fouled spark plugs by routing a heated gas through one or more engine cylinders and by routing a compressed gas through the one or more engine cylinders. In this way, on-demand airflow may be provided to expedite spark plug drying.

Подробнее
Номер записи: 98
07-05-2020 дата публикации

COMBINED ENGINE BRAKING AND POSITIVE POWER ENGINE LOST MOTION VALVE ACTUATION SYSTEM

Номер: US20200141335A1
Автор: Ernest Steven N., Fuchs Neil E., Groth Kevin P., Huang Shengqiang, Lester John J., Paturzo Joseph, Ruggiero Brian L.
Принадлежит:

A system for actuating one or more engine valves for positive power operation and engine braking operation is disclosed. In a preferred embodiment, an exhaust valve bridge and intake valve bridge each receive valve actuations from two sets of rocker arms. Each valve bridge includes a sliding pin for actuating a single engine valve and an outer plunger disposed in the center of the valve bridge to actuate two engine valves through the bridge. The outer plunger of each valve bridge may be selectively locked to its valve bridge to provide positive power valve actuation. During engine braking, application of hydraulic pressure to the outer plungers may cause the respective valve bridges and outer plungers to unlock so that all engine braking valve actuations are provided from a rocker arm acting on one engine valve through the sliding pin. 1. A valve bridge for use in an internal combustion engine comprising a plurality of cylinders , the valve bridge comprising:a valve bridge body configured to extend between two valves for a cylinder of the plurality of cylinders, the valve bridge body having a central opening extending through a thickness of the valve bridge body at a location between the two valves; anda first lost motion assembly disposed within the central opening,wherein the valve bridge body further comprises a slide opening having a sliding pin disposed therein, the side opening and sliding pin configured to align with a first valve of the two valves,wherein engine braking events are imparted to the first valve of the two valves via the sliding pin and a second lost motion assembly.2. The valve bridge of claim 1 , wherein the engine braking events imparted to the first valve of the two valves via second lost motion assembly comprise at least two compression release events for every four engine strokes.3. The valve bridge of claim 1 , wherein the second lost motion assembly comprise a hydraulic lost motion assembly.4. The valve bridge of claim 1 , wherein the ...

Подробнее
Номер записи: 99
01-06-2017 дата публикации

MULTIPLE VARIABLE VALVE LIFT APPARATUS

Номер: US20170152772A1
Автор: Choi Byong Young, Han Seung Kook, Kim Wootae, Woo Soo Hyung
Принадлежит: HYUNDAI MOTOR COMPANY

A multiple variable valve lift apparatus may include a first moving cam provided to rotate together with a camshaft and move in an axial direction of the camshaft, and configured to form a first cam guide protrusion and a plurality of cams realizing different valve lifts from each other, a second moving cam provided to rotate together with a second camshaft and move in an axial direction of the second camshaft, and configured to form a second cam guide protrusion and a plurality of cams realizing different valve lifts from each other, a first operating device operated to move the first moving cam in a first direction, a second operating device operated to move the second moving cam in a second direction, a controller configured to control operations of the first operating device and the second operating device, and a valve opening/closing device. 1. A multiple variable valve lift apparatus comprising:a first moving cam formed in a hollow cylindrical shape in which a camshaft inserted into the hollow cylindrical shape, provided to rotate together with the camshaft and move in an axial direction of the camshaft, and configured to form a first cam guide protrusion and a plurality of cams realizing different valve lifts from each other;a second moving cam formed in a second hollow cylindrical shape in which a second camshaft inserted into the second hollow cylindrical shape, provided to rotate together with the second camshaft and move in an axial direction of the second camshaft, and configured to form a second cam guide protrusion and a plurality of cams realizing different valve lifts from each other;a first operating device configured with a plurality of pins for guiding the first cam guide protrusion disposed thereon and operated to move the first moving cam in a first direction;a second operating device configured with a plurality of pins for guiding the second cam guide protrusion disposed thereon and operated to move the second moving cam in a second direction;a ...

Подробнее
Номер записи: 100