ЭЛЕКТРОГИДРАВЛИЧЕСКАЯ ФОРСУНКА АККУМУЛЯТОРНОЙ ТОПЛИВНОЙ СИСТЕМЫ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

Изобретение может быть использовано в системах топливоподачи двигателей внутреннего сгорания. Предложена электрогидравлическая форсунка аккумуляторной топливной системы дизельного двигателя, содержащая корпус 1 с группой корпусных деталей 2, 3, в которых имеются каналы высокого давления, каналы слива, распылитель с распыливающими отверстиями и иглой, размещенной в распылителе, торцевой упор 12 иглы и электроуправляемый клапан 27. Форсунка имеет дополнительный выпускной канал 21 из камеры управления 13, выход которого объединен с выходом основного выпускного канала 16 и каналом 25 клапана 27, а вход открыт при малых подъемах иглы и закрывается при больших. Эффект управляемого байпасирования жиклера основного выпускного канала позволяет начинать процесс подачи быстро, но затем медленно увеличивать расход подаваемого в цилиндр двигателя топлива. Таким образом, обеспечивается ломаный передний фронт характеристики впрыскивания топлива. Техническое решение позволяет добиться выполнения экологических ...

БИРАЗДЕЛЕННАЯ СИСТЕМА ТОПЛИВОПОДАЧИ

Устройство относится к двигателестроению, в частности к производству дизельных двигателей. Полезная модель позволяет снизить расход дизельного топлива и расширить технологические возможности. Полезная модель позволяет повысить качество смесеобразования, установление точности дозирования топлива в зависимости от режимов работы двигателя, повышение качества распыления топлива, упрощение конструкции системы топливоподачи дизельного топлива. Биразделенная система топливоподачи, содержит топливный насос высокого давления с секциями, топливопроводы высокого давления, основные форсунки, установленные в цилиндрах, обратные клапаны, причем, в топливном насосе высокого давления выполнена дополнительная секция низкого давления, связанная посредством топливопровода с аккумулирующей камерой, содержащей технологический газ, причем аккумулирующая камера соединена топливопроводами низкого давления с основными форсунками, каждая из которых жестко соединена с индивидуальным электромагнитным клапаном, управляемыми ...

СИСТЕМА ТОПЛИВОПОДАЧИ ДИЗЕЛЯ

Использование: двигателестроение, в частности дизельная топливная аппаратура. Сущность изобретения: система топливоподачи дизеля содержит топливный насос высокого давления, основные форсунки, установленные в цилиндрах и средство предварительной подачи топлива во впускной коллектор, выполненное в виде дополнительной форсунки. Дополнительная форсунка связана топливопроводами с насосом высокого давления и основными форсунками. Система снабжена дросселирующими вентилями с электромагнитным или ручным приводом, которые установлены между основными форсунками и дополнительной форсункой. 1 з. п. ф-лы, 4 ил.

Топливный насос для двухфазного впрыска

Топливоподающая аппаратура для двухстадийной подачи топлива и способ ее работы

Изобретение относится к двигате- лестроению и позволяет повысить стабильность подачи в основной и запальной дозах в широком диапазоне изменения скоростного и нагрузочного режимов работы. Кулачок привода топливного насоса 1 высокого давления с рейкой и с нагнетательным клапаном (К) с разгрузочным пояском вьшолнен в виде основного и вспомогательного профилей для подачи основной и запальной доз топлива. Подпружиненный обратный К 8 с пружиной 17 и направляющей 14 с (С ...

VERFAHREN ZUR ERHÖHUNG DES WIRKUNGSGRADES EINES KATALYSATORS EINES DIESELMOTORS

EINSPRITZSYSTEM FUER LUFTVERDICHTENDE BRENNKRAFTMASCHINEN

Verfahren und Vorrichtung zur Einstellung der Einspritzstromdauer für jeden Brennstoffschuß in einem mehrfachen Brennstoffeinspritzereignis zur Kompensation der inherenten Einspritzvorrichtungsverzögerung

Ein Brennstoffeinspritzsteuersystem und -verfahren zur Steuerung von mehreren Brennstoffeinspritzungen in einen Zylinder eines Motors während eines Brennstoffeinspritzereignisses, basierend auf den Motorbetriebszuständen, wird offenbart, wobei das Steuersystem eine elektronische Steuervorrichtung aufweist, die mit einer elektronisch gesteuerten Brennstoffeinspritzvorrichtung gekoppelt ist, wobei die Steuervorrichtung betreibbar ist, um ein Brennstoffeinspritzstromsignal an die Brennstoffeinspritzvorrichtung zu bestimmen und zu liefern, um die Dauer von jedem Brennstoffschuß einzustellen, der mit einem speziellen Brennstoffeinspritzereignis assosiiert ist, um die inherente Verzögerung der Brennstoffeinspritzvorrichtung ansprechend auf das Einspritzstromsignal zu kompensieren, d. h. die Verzögerung zwischen dem Beginn des Einspritzstromsignals und dem tatsächlichen Beginn der Brennstoffeinspritzung.

Kraftstoffeinspritzvorrichtung eines Direkteinspritzungsmotors, Direkteinspritzungsmotor, Verfahren zum Steuern eines Motors und Computerprogammprodukt

Eine Kraftstoffeinspritzvorrichtung eines Direkteinspritzungsmotors wird zur Verfügung gestellt. Die Vorrichtung beinhaltet einen Motorkörper, ein Kraftstoffeinspritzventil und eine Regel- bzw. Steuereinrichtung für ein Regeln bzw. Steuern einer Kraftstoffeinspritzung durch das Kraftstoffeinspritzventil. Das Kraftstoffeinspritzventil weist ein Düsenloch, einen Ventilkörper für ein Öffnen und Schließen des Düsenlochs und eine erste und zweite Solenoid- bzw. Magnetspule für ein Anheben des Ventilkörpers um ein erstes bzw. zweites Hubausmaß auf. Die Regel- bzw. Steuereinrichtung führt die Kraftstoffeinspritzung durch die erste Magnetspule in einer Einlasshubperiode innerhalb eines Motorbetriebsbereichs mit einer Motorlast unter einer vorbestimmten Last durch. Die Regel- bzw. Steuereinrichtung führt die Kraftstoffeinspritzung mit einem Kraftstoffdruck von 40 MPa oder darüber durch die zweite Magnetspule in einer Periode zwischen einer späten Stufe eines Verdichtungshubs und einer frühen Stufe ...

Verfahren zur Gemischbildung in einem Brennraum eines Verbrennungsmotors

Steuergerät für die Verbrennung einer Brennkraftmaschine

Fuel-injection control apparatus for internal combustion engine, has injection limiters limiting specific injection side which restrains heat energy released of injector drive circuit when increase of temperature exceeds predetermined value

The apparatus has a controller, which controls an injector which injects fuel according to operational status of an engine. Injection limiters (S205-S210) limit the specific injection on the side, which restrains the heat energy released of an injector drive circuit when increase of temperature in predetermined period exceeds a predetermined value : An ECU temperature detector detects or estimates the temperature of the injector drive circuit. The controller outputs a drive signal to the injector to drive the injector.

Verfahren zum Betrieb eines Gasmotors

Verfahren zur Bildung eines zündfähigen Kraftstoff-Luftgemischs

Verfahren zur Bildung eines zündfähigen Kraftstoff-Luftgemischs in einem Brennraum (2) einer direkteinspritzenden Brennkraftmaschine mit einer einen Verschlusskörper (10) aufweisenden, nach außen öffnenden Einspritzdüse (1), mit der – der Kraftstoff als Kraftstoffkegel (7) eingebracht wird, und der Kraftstoffkegel (7) eine Masseelektrode (3') einer Zündkerze (3) im wesentlichen nicht benetzt, und wobei – am Ende des Kraftstoffkegels (7) im Bereich eines Kolbens (9) mindestens ein Toruswirbel (11) erzeugt wird, durch den ein zündfähiges Kraftstoff-Luftgemisch im Bereich der Zündkerze entsteht, und wobei – während des Kompressionshubs Kraftstoff in einem Einspritzzyklus in mindestens zwei Teilmengen in den Brennraum (2) eingebracht wird, wobei die erste Teilmenge 70 % bis 99 % der gesamten Kraftstoffmenge beträgt, und die zweite Teilmenge nach 0,05 ms bis 0,4 ms oder 1° KW bis 5° KW eingebracht wird, und der Einspritzzyklus zwischen 50° KW und 5° KW vor OT beendet wird.

Dieselmotor

Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Die Kraftstoffeinspritzeinrichtung weist eine Kraftstoffhochdruckpumpe (10) und ein mit dieser verbundenes Kraftstoffeinspritzventil (12) für jeden Zylinder der Brennkraftmaschine auf. Ein Pumpenarbeitsraum (22) der Kraftstoffhochdruckpumpe (10) ist mit einem Druckraum (40) des Kraftstoffeinspritzventils (12) verbindbar, das ein Einspritzventilglied (28) aufweist, durch das wenigstens eine Einspritzöffnung (32) gesteuert wird und das durch den im Druckraum (40) herrschenden Druck gegen eine Schließkraft (44) in einer Öffnungsrichtung (29) bewegbar ist. Durch ein erstes elektrisch betätigtes Steuerventil (60) wird eine Verbindung (59) des Pumpenarbeitsraums (22) mit einem Entlastungsraum (9) gesteuert und durch ein zweites elektrisch betätigtes Steuerventil (68) wird der in einem Steuerdruckraum (52) herrschende Druck gesteuert, durch den das Einspritzventilglied (28) in Schließrichtung beaufschlagt ist. In der Druckraumverbindung (54) des Pumpenarbeitsraums (22) mit dem Druckraum (40) ist ...

Ignition and Fuel Injection Control for an Internal Combustion Engine

... 1,196,378. Fuel injection and ignition systems. DR. ING. h.c.F. PORSCHE K.G. Nov.21, 1968 [Dec.20, 1967 [Dec.20, 1967 No.55221/68. Heading F1B. To ensure good mixing of the fuel and air in a fuel-injection type I.C. engine, particularly at low engine speeds when the air flow is low, the fuel injection for each cycle is divided into a plurality of separate spaced injections to provide additional turbulent rising, and a number of separate spaced ignitions for each cycle are also provided. The quantity of fuel injected is regulated by a device 14, which is preferably a monostable multi-vibrator producing pulses having a duration preferably dependent on the position of the accelerator pedal and on engine operating conditions including speed and temperature, singly or in combination. The output of the device 14 is fed to an electronic switch, preferably an AND gate 17, to which is also fed pulses generated at uniform intervals of, say, 1 ms by an astable multi-vibrator 15. The output pulses ...

Fuel injection valve for internal combustion engines

Device of injection, in particular for engines with lighting by compression.

FUEL INJECTION SYSTEM

DEVICE FOR INJECTING FUEL INTO THE COMBUSTION CHAMBER OF AN INTERNAL-COMBUSTION ENGINE

FUEL INJECTOR WITH SINGLE SOLENOID VALVE WITH BALL BEARING SEAT

PROCEDURE FOR THE ENTERPRISE OF AN DIRECTINJECTING COMBUSTION ENGINE AS WELL AS DIRECTINJECTING COMBUSTION ENGINE

DIESEL ENGINE EMISSION REDUCTION BY MULTIPLE INJECTION WITH INCREASING PRESSURE

FUEL INJECTION SYSTEM WITH COMPRESSED AIR SUPPORT

VERFAHREN ZUM BETREIBEN EINER FREMDGEZÜNDETEN BRENNKRAFTMASCHINE

COMBINED STROKE/PRESSURE CONTROLLED FUEL-INJECT PROCEDURES AND - TO SYSTEM FOR AN INTERNAL-COMBUSTION ENGINE

SYSTEM FOR THE SUPPORT OF THE REGENERATION OF A PARTICLE FILTER CONTAINING IN THE EXHAUST LINE OF A DIESEL ENGINED VEHICLE ENGINE

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

Four-stroke diesel engine with catalytic converter

Compressed air assisted fuel injection system

Dispositif d'injection de moteur à allumage par compression

Dispositif d'injection pour moteur à allumage par compression

Fuel injection control system

DISPOSITIF D'INJECTION DE CARBURANT POUR MOTEURS A COMBUSTION INTERNE A AUTO-ALLUMAGE

Entre la pompe d'injection 1 et la soupape d'injection 3 se trouve un conduit d'alimentation 2 divisé en un tronçon court 6 sur lequel se trouve une soupape de dosage 7 pour mesurer une quantité de carburant préinjecté et en un tronçon long 5 se terminant par un clapet antiretour 8 pour la quantité principale injectée du carburant, de sorte que le volume de préinjection et le décalage dans le temps entre la préinjection et l'injection principale sont constants indépendamment de la vitesse et de la charge du moteur. (CF DESSIN DANS BOPI) ...

PROCEEDED OF COMBUSTION FOR INTERNAL COMBUSTION ENGINE

PROCEEDED OF CONTROL OF THE FUEL INJECTION IN AN INTERNAL COMBUSTION ENGINE HAS DIRECT INJECTION, IN PARTICULAR DIESEL TYPE

La présente invention concerne un procédé de contrôle de l'injection d'un carburant dans un moteur à combustion interne à injection directe, notamment de type Diesel, comportant un cylindre (10) avec une chambre (14) pour la combustion d'un mélange carburé et comprenant des moyens d'injection de carburant (20) dans ladite chambre en au moins un jet (24) comprenant une portion primaire de jet (26) et au moins une portion secondaire de jet (28) succédant à la portion primaire. Selon l'invention, le procédé consiste à injecter dans la chambre de combustion la portion primaire (26) de jet selon au moins une direction (A, B ; E) et à injecter la portion secondaire (28) de jet dans au moins une direction (C, D, F, G, H, I, J, L, M) formant un angle (α, θ) non nul avec la direction de ladite portion primaire de jet.

Device for the ordering of the advance to the injection.

PROCESS AND CONTROL DEVICE WITH COMPENSATION OF the WAVE OF PRESSURE Of a SYSTEM Of INJECTION Of an INTERNAL COMBUSTION ENGINE

Injection nozzle for cylinder head of internal combustion engine, comprises body with internal operating rod which actuates jet closing element having shape of two opposed cones

Buse d'injection pour une tête de cylindre pour un moteur à combustion interne, et procédé pour former un mélange carburant/ air dans un moteur à combustion interne à injection directe Dans une tête de cylindre pour un moteur à combustion interne qui comprend une bougie d'allumage (3) prévue dans une chambre de combustion (2), est agencée une buse d'injection (1) qui présente une face frontale de carter (27) et qui comporte un élément d'obturation (6), avec un corps d'obturation (10), déplaçable au moyen d'un organe de positionnement. La face frontale de carter (27) de la buse d'injection (1) forme avec le corps d'obturation (10) une surface commune plane, dans l'état fermé de la buse d'injection (1).

PROCESS AND DEVICE Of FUEL INJECTION IN an INTERNAL COMBUSTION ENGINE

Internal combustion engine's e.g. diesel engine, fuel injector controlling method for motor vehicle, involves controlling two closing members at cold when temperature of cooling liquid is less than threshold value of cold start of engine

L'invention concerne un procédé de pilotage d'un injecteur de carburant (10) d'un moteur à combustion interne démarrant à froid, l'injecteur comportant, d'une part, au moins deux rangées (14, 15) d'orifices de giclage de carburant régulièrement répartis sur la périphérie de l'injecteur, et, d'autre part, au moins deux organes d'obturation mobiles indépendamment entre une position fermée d'obturation des orifices de giclage de l'une des rangées et une position ouverte de libération des orifices de giclage de cette rangée. Selon l'invention, le procédé comporte une étape de comparaison de la température du moteur avec une valeur seuil, et, si cette température est inférieure à la valeur seuil, une étape de pilotage à froid de l'un des organes d'obturation pour qu'il reste en position fermée et de l'autre des organes d'obturation pour qu'il passe alternativement de la position fermée à la position ouverte.

FEEDING SYSTEM MULTI-INJECTION FOR CONTROL OF UNBURNT HYDROCARBONS.

FEEDING SYSTEM MULTI-INJECTION FOR CONTROL OF UNBURNT HYDROCARBONS.

FEEDING SYSTEM MULTI-INJECTION FOR CONTROL OF UNBURNT HYDROCARBONS.

METHOD FOR FORMING AN IGNITABLE FUEL/AIR MIXTURE

METHOD FOR FORMING AN IGNITABLE FUEL/AIR MIXTURE

CONTROL APPARATUS FOR INTRA-CYLINDER INJECTION TYPE ENGINE

PURPOSE: A control apparatus is provided to achieve an effective refresh performance for NOx catalyst while suppressing deterioration of fuel efficiency. CONSTITUTION: In an intra-cylinder injection type engine having an injector(22) for directly injecting fuel into a combustion chamber, and a lean NOx catalyst, a control apparatus comprises an air fuel ratio control unit for controlling the air fuel ratio ranging from a level higher than the stoichiometric air fuel ratio to a level lower than the stoichiometric ratio, and a control unit(72) for performing catalyst refreshment. The control unit controls the injector to perform a pre-fuel injection during an air suction stroke and a post-fuel injection during a compression stroke, when the air fuel ratio is changed from a level higher than the stoichiometric air fuel ratio to a level lower than the stoichiometric ratio. COPYRIGHT 2000 KIPO ...

Multiple operating mode engine and method of operation

A multi-mode internal combustion engine and method of operating the engine is provided which is capable of operating in a variety of modes based on engine operating conditions to enhance fuel efficiency and reduce emissions. The multi-mode engine include a fuel delivery system and control system for permitting the engine to operate in a diesel mode, a homogeneous charge dual fuel transition mode, a spark ignition or liquid spark ignition mode and/or a premixed charge compression ignition mode. The control system and method permits the engine operation to transfer between the various modes in an effective and efficient manner by controlling one or more fuel delivery devices or other engine components so as to move along a continuous transfer path while maintaining engine torque at a substantially constant level.

Injection device comprising an actuator for controlling the needle stroke

The invention relates to an arrangement for injecting fuel, which is at high pressure, into an internal combustion engine. An injector (25) encloses a pressure chamber (1), from which a high-pressure line (3) discharges into a control chamber (4) of a nozzle needle (5). Also contained in the injector (25) are two control valves (11, 12), which on the outlet side communicate with regions (9) of a lesser pressure level. One of the control valves (11, 12) that form the injection course (20) contains a pressure compensation system (34), by which the injection pressure course (20) can be varied by varying the stroke length (23) of the nozzle needle (5).

A method of operating a gas engine

A method of operating a gas engine, the gas engine comprising a first fuel feed system (2), a second fuel feed system (3) and a third fuel feed system (4), in which method in the first operation mode the engine is run by introducing gaseous fuel into the engine (1) combustion air via the first fuel feed system (2), and the gaseous fuel is ignited by injecting ignition fuel into the mixture of gaseous fuel and combustion air via the second fuel feed system (3). In the second operation mode of the method the engine is run by still introducing gaseous fuel into the engine (1) combustion air via the first fuel feed system (2) and the gaseous fuel is ignited by injecting ignition fuel into the mixture of gaseous fuel and the combustion air via the third fuel feed system (3).

Fuel injection device of an engine

A device provided with a fuel injector and a reservoir for temporarily storing the fuel to be fed to the fuel injector. Fuel is injected at least two times in one engine cycle. Pulsation of fuel occurring in the fuel injector due to a prior fuel injection is propagated to the reservoir, reflected at the reservoir, and returns to the fuel injector. Due to the effects of the returned pulsation, the fuel injection amount in the later fuel injection fluctuates. The opening timing of the fuel injector and the fuel injection pressure are employed as parameters affecting the fuel injection amount in the later fuel injection, the amounts of fluctuation of the parameters due to the pulsation are estimated, and a control value relating to the operation of the fuel injector is controlled based on the estimated amounts of fluctuation of the parameters so that a target amount of fuel is injected from the fuel injector.

Control apparatus for direct injection engine

Fuel injection system for internal combustion engine

Fuel injection device for IC engines has second control valves to set high pressure in fuel injection valve pressure chamber and close injection valve member The device has a fuel pump (10) for each cylinder, fuel injection valves (12), and electric control valves (60). A first control valve is located close to the fuel pump, a second control valve (64) is positioned close to the fuel injection valve, and is operated by the pressure in the control pressure chamber (52) of the injection valve, which charges the valve member (28) in closing direction. The second control valve controls a connection (56) between the control pressure chamber and the pump working chamber (22).

METHOD FOR INCREASING THE EFFICIENCY OF A CATALYST IN A DIESEL ENGINE

An injection method applicable to engines featuring a Denox catalyst for reducing the nitric oxide content of exhaust gas. In addition to the main injection phase, the method presents a post-injection phase predominantly performed during the exhaust stroke of the engine, so that the diesel fuel injected does not contribute - or only to a very limited extent - towards combusion, but is supplied directly to the Denox catalyst to increase its efficiency. The method involves no alterations to the injection system, by virtue of post-injection being controlled and optimized by the central unit controlling injection as a whole.

СПОСОБ РАБОТЫ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

Изобретение относится к области двигателестроения и может быть использовано для организации рабочего процесса с двустадийным смесеобразованием в дизельных двигателях внутреннего сгорания. Задачей изобретения является улучшение экономических и экологических показателей двигателя, в частности снижение дымности отработавших газов за счет увеличения полноты сгорания предпочтительно на стабильно высоких нагрузках для малоразмерных дизельных двигателей со стесненной камерой сгорания. Способ работы включает подачу воздуха в цилиндр, сжатие его, подачу одной части топлива в камеру сгорания и другой части в зону впускного клапана со стороны впускного трубопровода с двустадийным смесеобразованием на рабочих режимах с повышенной нагрузкой, воспламенения топливовоздушной смеси от сжатия и последующего сгорания в цилиндре, расширение и выпуск отработавших продуктов сгорания, регулирование подачи топлива по управляющему сигналу органа, связанного с двигателем. Двустадийное смесеобразование дополнительно ...

Verfahren zum Spülen eines Partikelfilters eines Dieselmotors

Verfahren zum Einspritzen von Kraftstoff in die Zylinder (12) eines einen Partikelfilter (48) aufweisenden Dieselmotors, bei dem die Kraftstoffeinspritzung in zumindest einen Zylinder (12) während eines Verbrennungszyklus in mehrere getrennte Teileinspritzvorgänge, die zusammen einen Einspritzzustand bilden, unterteilt wird und bei dem zwischen einem ersten Einspritzzustand, der durch früheres Nachspritzen von Kraftstoff Abgase mit einer hohen Temperatur erzeugt, und einem zweiten Einspritzzustand, der durch späteres Nachspritzen von Kraftstoff Abgase mit einer niedrigeren Temperatur, aber mit einem höheren Kohlenwasserstoffgehalt als der erste Einspritzzustand erzeugt, hin und her gewechselt wird, wobei die ersten und zweiten Einspritzzustände während verschiedener Verbrennungszyklen erzeugt werden, dadurch gekennzeichnet, dass zwischen den ersten und zweiten Einspritzzuständen ausreichend schnell hin und her geschaltet wird, so dass sich die während der verschiedenen Verbrennungszyklen ...

Verfahren zur Abgasnachbehandlung bei einem Verbrennungsmotor

Verfahren zur Abgasnachbehandlung bei einem Verbrennungsmotor mit Kraftstoffdirekteinspritzung, wobei die Kraftstoffeinspritzung als Mehrfacheinspritzung erfolgt und eine Sekundärlufteinblasung vorgenommen wird, dadurch gekennzeichnet, dass der Beginn (w) des Betriebs des Verbrennungsmotors (1) mit Sekundärlufteinblasung (SLE) zeitverzögert zum Beginn (v) des Betriebs des Verbrennungsmotors (1) mit Mehrfacheinspritzung erfolgt.

Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine

Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen

Kraftstoffeinspritzvorrichtung der Akkumulatorgattung

Messen der Absperrbewegung durch einen Druckaufnehmer

Purging a particulate trap of a diesel engine

Fuel-injection device providing a pre-injection and main injection procedure in an internal combustion engine

Accumulator fuel-injection apparatus

Method and control means for controlling operation of an internal combustion engine

Premixed charge compression ignition engine with variable speed soc control and method of operation

EINRICHTUNG ZUR VORÜBERGEHENDEN UNTERBRECHUNG DES DRUCKAUFBAUES BEI EINER KRAFTSTOFFEINSPRITZDÜSE FÜR BRENNKRAFTMASCHINEN

DEVICE TO REGENIERUNG A PARTICLE FILTER IN AN SELFIGNITED INTERNAL-COMBUSTION ENGINE

PROCEDURE FOR GESTEUERUTEN INJECTING OF FLUID INTO AN INTERNAL-COMBUSTION ENGINE

VERFAHREN ZUM BETREIBEN EINER FREMDGEZÜNDETEN BRENNKRAFTMASCHINE

CONTROL PROCEDURE

VERFAHREN ZUM BETREIBEN EINER BRENNKRAFTMASCHINE

Fuel, especially ethanol, is injected in an internal combustion engine via at least one injection device into a combustion chamber, with the injection pressure of the fuel being temporarily increased during the starting phase of the internal combustion engine. The injected fuel quantity is divided among several injections in the intake phase during the start of the internal combustion engine, with at least two injections being performed during the intake phase and with the multiple injections being performed with high injection pressure already in the dragging phase for the first injections. The starting behavior can be improved when the quantity of fuel of the last fuel injection is lower than the quantity of each preceding fuel injection.

BRENNKRAFTMASCHINE, INSBESONDERE DIESEL-BRENNKRAFTMASCHINE

The engine has an injection system (1) with at least one distributing injection pump (2) that feeds fuel to at least one injection valve (4) per cylinder and that has at least one electromagnetic or piezo mechanical actuator (6,6a) for altering the supply quantity and/or start time. The opening and closing times of the injection valve can be controlled independently of the fuel pressure generated by the distributing injection pump.

VERFAHREN ZUM BETREIBEN EINER FREMDGEZÜNDETEN VIERTAKT-BRENNKRAFTMASCHINE

During an idling phase, fuel is repeatedly injected in a cycle. To attain stable combustion in the easiest way possible during idling, a first injection (E1) carried out during an intake cycle in the idling phase begins in a crank angle (KW) area between 0degrees and 70degrees, preferably between 20degrees and 70degrees after top dead center (LOT) for gas exchange.

INJECTION MECHANISM AND PROCEDURE FOR INJECTING FLUID

MECHANISM FOR THE TEMPORARY INTERRUPTION OF THE PRESSURE BUILD-UP WITH A FUEL INJECTION NOZZLE FOR INTERNAL-COMBUSTION ENGINES

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

Method and Device for Operating an Injection Valve

An injection nozzle has a nozzle needle that suppresses metering of fluid in a closed position and otherwise allows the metering of fluid. Furthermore, the injection valve has a solid-state actuator that acts on the nozzle needle. A first operating phase is performed for a closing operation in a first operating mode, during which first operating phase the solid-state actuator is discharged to a predefined part charge. Furthermore, a second operating phase is performed, during which the solid-state actuator is operated as a sensor. An operating duration of the second operating phase is predefined such that the closed position of the nozzle needle is reached during the operating duration. A third operating phase is performed, during which the solid-state actuator is discharged further to a predefined reference state. In a second operating mode, the first and second operating phases are carried out and the third operating phase is omitted. 1. A method for operating an injection valve including a nozzle needle that prevents a metering of fluid when in a closed position and otherwise permits the metering of fluid , a solid-state actuator configured to act on the nozzle needle and influence the position thereof , the method comprises:performing a closing process of the nozzle needle in a first operating mode by:performing a first operating phase during which the solid-state actuator is discharged to a predefined partial charge,performing a second operating phase during which the solid-state actuator is operated as a sensor, the operating duration of which second operating phase is predefined such that the nozzle needle reaches the closed position during the operating duration, andperforming a third operating phase during which the solid-state actuator is discharged further to a predefined reference state, andperforming a closing process of the nozzle needle in a second operating mode by:performing the first operating phase,performing the second operating phase, ...

Fuel Injection System for Diesel Engines with Compression Ignition

In a fuel injection system and method for a diesel engine with compression induced ignition, NOemissions are reduced by providing a supplemental fuel injection from a supplemental injection nozzle, in addition to the primary fuel injection through a primary injection nozzle. The supplemental injection nozzle injects a supplemental quantity of fuel onto a vaporization surface such as an exhaust valve, a flame ring area, or a top surface of the piston, in the combustion chamber, whereupon the supplemental fuel vaporizes and forms a lean air/fuel mixture. Thereafter, the primary injection nozzle injects the main fuel charge into the combustion chamber, to produce a rich air/fuel combustion mixture, which is then ignited and combusts. 1. A diesel engine with compression ignition , comprising:a cylinder with a piston movably arranged therein, defining a combustion chamber bounded by said piston in said cylinder;an inlet valve communicating with said combustion chamber;an exhaust valve communicating with said combustion chamber;a primary fuel injection nozzle arranged in said cylinder to inject a primary charge of diesel fuel into said combustion chamber;a supplemental fuel injection nozzle arranged in said cylinder to inject a supplemental charge of diesel fuel directed onto a hot vaporizing surface in said combustion chamber, wherein said hot vaporizing surface has a temperature above a vaporizing temperature of the diesel fuel during the operation of said diesel engine; anda control arrangement adapted and arranged to control a supplemental injection of the supplemental charge of diesel fuel by said supplemental fuel injection nozzle to occur at a first time and with a first quantity of said supplemental charge to produce in said combustion chamber an initial air/fuel mixture below a self-ignition limit, and to control a primary injection of the primary charge of diesel fuel by said primary fuel injection nozzle to occur at a second time and with a second quantity of ...

Fuel injection control device for internal combustion engine

An object of the present invention is to obtain a merit by intake stroke injection in a wider operation range while efficiently exploiting a merit of compression stroke injection in an internal combustion engine having a cylinder fuel injection device. For this purpose, a fuel injection control device provided by the present invention sets an injection sharing ratio of a quantity of a fuel which is injected in an intake stroke, and a quantity of a fuel which is injected in a compression stroke, in accordance with an operating state or an environmental condition of the internal combustion engine, and manipulates the cylinder fuel injection device so as to inject a part or all of a required fuel in the intake stroke and inject a remaining part in the compression stroke, in accordance with the set injection sharing ratio. The fuel injection control device sets the injection sharing ratio so as to make a proportion of the quantity of the fuel which is injected in the intake stroke larger when a temperature of air which is taken into a cylinder is determined to be higher than a temperature of a fuel which is injected from the cylinder fuel injection device, as compared with a case where the temperature of the air which is taken into the cylinder is determined to be lower than the temperature of the fuel which is injected from the cylinder fuel injection device.

INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A combustion control part of a control device for an internal combustion engine configured to calculate a first vibration level of an engine body at a first judgment frequency band of a second overtone of a specific frequency band based on vibration acceleration detected by a vibration sensor and, when the first vibration level is less than a predetermined first reference vibration level set in advance according to the engine operating state, to correct one or both of a target injection amount and target injection timing so that the first vibration level becomes the first reference vibration level or more. 1. A control device for an internal combustion engine , an engine body;', 'a fuel injector injecting fuel for combustion inside a combustion chamber of the engine body; and', 'a vibration sensor detecting vibration acceleration of the engine body, wherein, 'the internal combustion engine comprising;'}the control device comprises a combustion control part configured to control an injection amount and injection timing of fuel injected from the fuel injector to a target injection amount and target injection timing set based on an engine operating state to cause the fuel to burn by self ignition so as to cause generation of heat in the combustion chamber two times in stages so a pressure waveform showing a change along with time of a rate of rise of cylinder pressure becomes a two-peak shape and so that a peak interval from a first peak value of a first peak of the pressure waveform formed by the first heat generation to a second peak value of a second peak of the pressure waveform formed by the second heat generation becomes a reference peak interval suppressing vibration acceleration of a specific frequency band in vibration acceleration of the engine body, and calculate a first vibration level of the engine body in a first judgment frequency band of a second overtone of the specific frequency based on vibration acceleration detected by the vibration sensor; and,', ...

ENGINE UNIT

An engine unit includes an engine including a cylinder injection valve that sprays fuel into a combustion chamber and an ignition plug that is able to ignite fuel sprayed from the cylinder injection valve. When expansion stroke injection drive of performing final fuel injection from the cylinder injection valve in an expansion stroke and igniting the fuel using the ignition plug in synchronization with the fuel injection in the expansion stroke is performed, upper and lower limits of an ignition timing are guarded such that the ignition timing is in a predetermined range centered on a final fuel injection start timing at a final determination timing of the ignition timing. 1. An engine unit for a vehicle , comprising:an engine including a cylinder injection valve that sprays fuel into a combustion chamber and an ignition plug that is able to ignite fuel sprayed from the cylinder injection valve; anda control device configured to control a plurality of fuel injections using the cylinder injection valve and ignition using the ignition plug,wherein, when expansion stroke injection drive of performing final fuel injection from the cylinder injection valve in an expansion stroke and igniting the fuel using the ignition plug in synchronization with the fuel injection in the expansion stroke is performed, the control device is configured to perform ignition timing adjustment control for guarding upper and lower limits of an ignition timing such that the ignition timing is in a predetermined range centered on a final fuel injection start timing at a final determination timing of the ignition timing.2. The engine unit according to claim 1 , wherein the control device is configured to perform the expansion stroke injection drive and the ignition timing adjustment control at the time of restarting of the engine after idling stop.3. The engine unit according to claim 1 , wherein the final determination timing is a control cycle timing closest to a timing before the compression ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device is configured to perform, when it is estimated that a combustion fluctuation increases, estimation related to an ignition delay for initial flame generated from a discharge spark and an air-fuel mixture containing fuel spray injected by intake stroke injection. When it is estimated that the ignition delay for the initial flame is increased from that before the increase in the combustion fluctuation, an injection amount in expansion stroke injection is reduced in a next time cycle. When it is estimated that the ignition delay for the initial flame is reduced from that before the increase in the combustion fluctuation, the injection amount in expansion stroke injection is increased in a next time cycle. 1. A control device for controlling an internal combustion engine , the internal combustion engine comprising:an injector which is provided in an upper part of a combustion chamber and is configured to inject fuel directly into a cylinder;a spark plug which is configured to ignite an air-fuel mixture in the cylinder using a discharge spark, the spark plug being provided in the upper part of the combustion chamber and on a downstream side of the injector in a flow direction of a tumble flow formed in the combustion chamber, and being located above a contour surface of a fuel spray pattern injected from the injector toward the spark plug; andan exhaust gas cleaning catalyst which is configured to clean an exhaust gas from the combustion chamber,wherein in order to activate the exhaust gas cleaning catalyst, the control device is configured to control the spark plug so as to generate a discharge spark in an ignition period retarded from a compression top dead center, and control the injector so as to perform a first injection at a timing advanced from the compression top dead center and a second injection at a timing retarded from the compression top dead center, the second injection being performed so that an injection period overlaps with at least a ...

Fuel Injection Valve, Control Device for Fuel Injection Valve, and Control Method

The purpose of the present invention is to provide a control means which, with respect to injection control of a fuel injection valve, reduces deviation between an injection quantity of fuel injected by the fuel injection valve and a target value, the deviation being caused due to a pressure in a combustion chamber, as an injection timing in a compression stroke of an engine is retarded. The present invention pertains to a fuel injection valve that performs a plurality of injections in one engine cycle, and performs control in such a manner that injection pulse signals and are transmitted to a drive circuit, and from the drive circuit for the fuel injection valve that outputs drive current waveforms for fuel injection, the injection pulse signal in the compression stroke when the injection timing is retarded is shortened. 1. A control device for a fuel injection valve that performs a plurality of injections in one cycle , the control device comprising:a control unit that controls a time for supplying drive current to the fuel injection valve,wherein the control unit controls so that, when fuel is injected in a compression stroke, a time for supplying drive current for injection at a second injection timing later than a first injection timing is shorter than a time for supplying drive current for injection at the first injection timing.2. A control device for a fuel injection valve that performs a plurality of injections in one cycle , the control device comprising:a control unit that controls a pulse width for supplying drive current to the fuel injection valve,wherein the control unit controls so that, when fuel is injected in a compression stroke, a pulse width for supplying drive current for injection at a second injection timing later than a first injection timing is smaller than a pulse width for supplying drive current for injection at the first injection timing.3. The control device for a fuel injection valve according to claim 1 ,wherein the control unit ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An intake stroke injection and a compression stroke injection are performed during catalyst warm-up control (upper section in FIG. ). During the catalyst warm-up control, a discharge period at an electrode portion is set on a retard side of compression top dead center, and an expansion stroke injection is performed during the discharge period. However, when a distance between a spray contour surface and the electrode portion increases, an additional injection (first injection) is performed in advance of the expansion stroke injection (second injection) (lower section in FIG. ). The additional injection is performed at a timing that is on the retard side of compression top dead center and is on an advance side relative to a start timing of the discharge at the electrode portion. 1. A control device for controlling an internal combustion engine , the internal combustion engine comprising:an injector which is provided in an upper portion of a combustion chamber and is configured to inject fuel directly into a cylinder;a spark plug which is configured to ignite an air-fuel mixture inside a cylinder using a discharge spark that is generated at an electrode portion, and which is provided at a position that is at the upper portion of the combustion chamber and is on a downstream side relative to the injector in a flow direction of a tumble flow that is formed inside the combustion chamber, and is provided so that a position of the electrode portion is above a contour surface of a fuel spray that is injected toward the spark plug from the injector; andan exhaust gas purification catalyst which is configured to purify exhaust gas from the combustion chamber;the control device which is configured to control at least fuel injection by the injector and a discharge at the electrode portion by the spark plug,wherein the control device is further configured to:control the injector so as to perform an intake stroke injection and an expansion stroke injection that activate the ...

SYSTEM AND METHOD OF INJECTOR CONTROL FOR MULTIPULSE FUEL INJECTION

A system, apparatus, and method are disclosed for controlling a fuel injector using multipulse fuel injection. According to at least one aspect of the present disclosure, the system includes a fuel sequence controller configured for use with a fuel injector having an injector configuration modeled by a body pressure characteristic that includes a rail pressure and an injection rate shape, where the fuel sequence controller is structured to determine an estimate of the injected fuel quantity delivered from the fuel injector at the determined body pressure characteristic. 1. An apparatus comprising:a fuel sequence controller configured for use with a fuel injector having an injector configuration modeled by a body pressure characteristic that includes a rail pressure and an injection rate shape, the fuel sequence controller structured to determine the body pressure characteristic corresponding to the injector configuration by operating upon the rail pressure and the injection rate shape, the fuel sequence controller further structured to determine an estimate of the injected fuel quantity delivered from the fuel injector at the determined body pressure characteristic, wherein the body pressure characteristic includes a pressure within a body of the fuel injector.2. The apparatus of claim 1 , wherein the body pressure characteristic further includes one or more of a drain flow shape claim 1 , an injector capacitance claim 1 , a damping ratio claim 1 , and a natural frequency of the body of the fuel injector.3. The apparatus of claim 1 , wherein the injector configuration includes a multipulse injection sequence in which each pulse has a command on-time and off-time.4. The apparatus of claim 3 , wherein the fuel sequence controller is further structured to adjust the command on-time and off-time of one or more pulses of the injector configuration to adjust the injected fuel quantity.5. The apparatus of claim 3 , wherein the fuel sequence controller is further structured ...

Method of determining the injection pattern in the compression stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine

A method to determine the injection pattern in the compression stroke of the combustion cycle of the cylinders of a direct-injection internal combustion engine, comprising the steps of determining the initial quantity of fuel and an objective quantity of fuel to be injected for each partial injection of a maximum number of partial injections; determining an effective quantity of fuel to be injected for each partial injection as a function of the respective initial quantity of fuel and of the respective objective quantity of fuel; and determining an objective pattern of partial injections to be performed in the compression stroke as a function of the value of the end of injection angle and of the effective quantity of fuel to be injected for each partial injection of a maximum number of partial injections to be performed in the compression stroke.

Control device for internal combustion engine

Provided is a control device for an internal combustion engine, the control device enabling the suppression of variations in the amount of fuel injected by injection while the boost voltage is charging, without offsetting the injection timing. A boost circuit ( 211 ) boosts a first voltage supplied from a battery ( 201 ), and supplies a boosted second voltage to a fuel injection device ( 214 ). Switches ( 212, 213 ) switch the second voltage supplied to the fuel injection device from the booster circuit on and off. Computation devices ( 204, 207 ) control the switches. Each computation device comprises: an estimation unit that, before the initial fuel injection in a combustion cycle, estimates the second voltage for all of the fuel injection times in the combustion cycle; and a correction unit that corrects the amount of fuel injected for each fuel injection time depending on the estimated second voltage.

Method of operating an internal combustion engine

A method of operating an internal combustion engine, wherein the engine is operated in an injector learning mode in which an injection parameter associated with a nominal fuel quantity of a pilot injection is learned, includes performing a learning pilot injection based on a candidate value for the injection parameter to influence injection of the nominal fuel quantity and determining a parameter indicative of the actually injected fuel quantity based on the in-cylinder pressure during combustion of the learning pilot injection. The learning pilot injection is operated at an early timing such that combustion thereof complete occurs within a learning window positioned before combustion TDC and before the next combustion starts. The pressure is measured over the learning window, so that the determination of the parameter indicative of the actually injected fuel quantity takes into account essentially the entire combustion event of the learning pilot injection.

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A fuel injector with multiple nozzle holes forms a lean mixture gas inside a combustion chamber, a spark plug ignites to cause the mixture gas to start combustion accompanied by flame propagation, then combust by self-ignition. A first atomized fuel spray injected from a first nozzle hole and a second atomized fuel spray injected from a second nozzle hole separate from each other by a swirl flow, and a third atomized fuel spray injected from a third nozzle hole and a fourth atomized fuel spray from a fourth nozzle hole approach each other by the swirl flow so that a first area and a second area where mixture gas is richer are formed inside the combustion chamber. The fuel injector sequentially performs first, second, and third injections with an injection interval therebetween in an intake stroke. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. An spark plug ignites the lean mixture gas to cause the mixture gas to start combustion accompanied by flame propagation, and then combust by self-ignition. A first atomized fuel spray injected from a first nozzle hole and a second atomized fuel spray injected from a second nozzle hole separate from each other by the swirl flow. The fuel injector sequentially performs first and second injections in an intake stroke. A ratio of an injection amount of the second injection to the entire amount of fuel required per cycle is increased as an engine load increases. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the fuel injector has at least a ...

FUEL INJECTION CONTROL DEVICE AND METHOD FOR INTERNAL COMBUSTION ENGINE

A fuel injection control device divides an amount of fuel corresponding to an injection amount required for a single combustion into portions corresponding to multiple fuel injections, causes the direct injector to inject the fuel in the multiple times, and causes the direct injector to execute a partial-lift injection as a final fuel injection. The device includes a total injection amount calculation section, an individual injection amount calculation section, and an injection amount changing section. The injection amount changing section executes, as a first changing process, a process for increasing the injection amount at the final fuel injection to a value between a partial-lift injection lower limit value and a partial-lift injection upper limit value and reducing the injection amount at a fuel injection other than the final fuel injection by the increased amount of the injection amount at the final fuel injection. 1. A fuel injection control device adapted to an internal combustion engine , whereinthe internal combustion engine is configured to execute a full-lift injection, in which a needle valve of a direct injector that injects fuel is fully opened, and a partial-lift injection, in which the needle valve of the direct injector is not fully opened,the fuel injection control device is configured to divide an amount of fuel corresponding to an injection amount required for a single combustion into portions corresponding to multiple fuel injections, cause the direct injector to inject the fuel in the multiple times, and cause the direct injector to execute the partial-lift injection as a final fuel injection of the multiple fuel injections, a total injection amount calculation section, which is configured to calculate a total amount of injection amounts at the multiple fuel injections as a total injection amount;', 'an individual injection amount calculation section, which is configured to calculate the injection amount at each fuel injection such that a sum ...

CONTROL METHOD AND CONTROL DEVICE OF DIRECT-INJECTION INTERNAL COMBUSTION ENGINE

A direct-injection internal combustion engine is controlled such that an injection count of multiple-stage injection is switched according to an operating region, and the multiple-stage injection is performed. The multiple-stage injection divides fuel into multiple times in one combustion cycle, and injects the fuel. Fuel vapor generated in a fuel tank as evaporated fuel is supplied to the internal combustion engine. An operating region in which the injection count of the multiple-stage injection is large is controlled to be narrower when an amount of the evaporated fuel supplied to the internal combustion engine is large, compared with a case of the amount of the evaporated fuel being not large. 16.-. (canceled)7. A control method of a direct-injection internal combustion engine that switches an injection count of a multiple-stage injection according to an operating region and performs the multiple-stage injection , the multiple-stage injection being configured to divide fuel into multiple times in one combustion cycle and inject the fuel , and the operating region being preliminarily divided into a plurality of regions of different injection counts , the control method comprising:supplying fuel vapor generated in a fuel tank as evaporated fuel to the internal combustion engine;dividing a fuel amount found by subtracting an amount of the evaporated fuel from an amount of fuel injection settled on a basis of an operating state into multiple times and injecting the fuel; andwhen an injection pulse width of each of the injections falls below a minimum injection pulse width, narrowing an operating region in which the injection count of the multiple-stage injection is large compared with the case of the injection pulse width of each of the injections being equal to or larger than the minimum injection pulse width, through reducing each of the injection counts of the plurality of regions or reducing each size of the plurality of regions.8. The control method of the ...

Fuel injection control device and fuel injection control method

A fuel injection control device of an in-cylinder direct injection spark ignition-type internal combustion engine 1 in which fuel injection is carried out once or multiple times from an intake stroke to a compression stroke during homogeneous combustion, wherein a fuel injection timing at which a charging efficiency is improved in accordance with a pressure oscillation is calculated based on a frequency determined based on an in-cylinder volume of pressure oscillation generated in the cylinder in accordance with fuel injection, and one of the fuel injection(s) is carried out at the fuel injection timing.

FUEL INJECTION CONTROL METHOD AND FUEL INJECTION CONTROL SYSTEM FOR DIESEL ENGINE

A fuel injection control system for a diesel engine is configured to, during one combustion cycle, perform multiple fuel injections to induce multiple combustions in a cylinder. The fuel injection control system comprises a PCM for controlling a fuel injection of the diesel engine. The PCM is configured to execute control for: at a first timing during compression stroke, injecting fuel in a first amount; at a second timing after the first timing and during the compression stroke, injecting fuel in a second amount greater than the first amount; and, at a third timing after the second timing and approximately a top dead center of the compression stroke, injecting fuel in a maximum amount greater than the first and second amounts. 1. A fuel injection control method for a diesel engine configured to , during one combustion cycle , perform multiple fuel injections to induce multiple combustions in a cylinder , the method comprising:injecting fuel in a first amount, at a first timing during compression stroke;injecting fuel in a second amount greater than the first amount, at a second timing after the first timing and during the compression stroke; andinjecting fuel in a maximum amount greater than the first and second amounts, at a third timing after the second timing and approximately a top dead center of the compression stroke.2. The fuel injection control method according to claim 1 , further comprising increasing each of the first and second amounts claim 1 , according to an increase in engine load of the diesel engine.3. The fuel injection control method according to claim 1 , further comprising increasing a ratio of each of the first and second amounts to a total injection amount in one combustion cycle claim 1 , according to an increase in engine load of the diesel engine.4. The fuel injection control method according to claim 2 , wherein claim 2 , when a total injection amount in one combustion cycle is increased according to an increase in the engine load of the ...

METHODS AND SYSTEM FOR ENGINE CONTROL

Systems and methods for determining air-fuel error in an engine fueled via direct and port fuel injection. Errors associated with individual fuel injection systems are distinguished from a common error based on trends in the error correction coefficients of the individual fuel injection systems. Adaptive fuel multipliers for each injection system are updated to account for the common error. 1. A method for fueling a cylinder , comprising:injecting fuel to the cylinder via a first fuel injector and a second fuel injector; and distinguishing an error associated with the first fuel injector or the second fuel injector from a common fuel system error as a function of a rate of change of air-fuel ratio error and a fraction of fuel injected via the first fuel injector or the second fuel injector.2. The method of claim 1 , wherein the common fuel system error includes one or more of an airflow error associated with an airflow path delivering air to both the first fuel injector and the second fuel injector claim 1 , and a fuel-type error associated with the fuel injected by both the first fuel injector and the second fuel injector.3. The method of claim 1 , where the distinguishing includes: dividing the rate of change of air-fuel ratio error by the fraction of fuel injected via the first fuel injector to determine a first slope; dividing the rate of change of air-fuel ratio error by the fraction of fuel injected via the second fuel injector to determine a second slope; and if the first slope is within a threshold difference of the second slope claim 1 , and each of the first and second slope is higher than a threshold value claim 1 , learning at least a portion of the air-fuel ratio error as the common error.4. The method of claim 3 , wherein the distinguishing further includes: if the first slope is not within the threshold difference of the second slope claim 3 , learning the air-fuel ratio error as the error associated with the first fuel injector when the first slope ...

METHODS AND SYSTEM FOR ENGINE CONTROL

Systems and methods for determining air-fuel error in an engine fueled via direct and port fuel injection. Errors associated with individual fuel injection systems are distinguished from a common error based on trends in the error correction coefficients of the individual fuel injection systems. Adaptive fuel multipliers for each injection system are updated to account for the common error. 1. A method for fueling a cylinder , comprising: injecting fuel to the cylinder via a first fuel injector and a second fuel injector; and distinguishing an error associated with the first fuel injector or the second fuel injector from a common fuel system error as a function of a rate of change of air-fuel ratio error and a fraction of fuel injected via the first fuel injector or the second fuel injector.2. The method of claim 1 , wherein the common fuel system error includes one or more of an airflow error associated with an airflow path delivering air to both the first fuel injector and the second fuel injector claim 1 , and a fuel-type error associated with the fuel injected by both the first fuel injector and the second fuel injector.3. The method of claim 1 , where estimating as a function of the air-fuel ratio error and the fraction includes: dividing a rate of change of air-fuel ratio error by the fraction of fuel injected via the first fuel injector to determine a first slope; dividing the rate of change of air-fuel ratio error by the fraction of fuel injected via the second fuel injector to determine a second slope; and if the first slope is within a threshold difference of the second slope claim 1 , and each of the first and second slope is higher than a threshold value claim 1 , learning a minimum of the first and second slope as the common error.4. The method of claim 1 , wherein correcting each of the first and second error based on the common error includes: determining a correction factor based on the common error; and reducing each of the first and the second ...

SYSTEM AND METHOD FOR INJECTING FUEL TO AN ENGINE

Methods and systems are provided for accounting for a difference between an expected amount of fuel scheduled to be delivered and an actual amount of fuel delivered to an engine cylinder during a fueling event. In one example, a method may include scheduling a direct injection to a cylinder based on an estimated expected amount of fuel injected to the cylinder during an immediately previous injection event. The expected amount of fuel injected during the immediately previous injection event may be a function of an average fuel rail pressure during the immediately previous injection event. 1. A method for an engine , comprising:adjusting an amount of fuel injected to a cylinder via a direct fuel injector during an injection event based on an estimated expected amount of fuel injected to the cylinder during an immediately previous injection event, the estimated expected amount of fuel injected being determined as a function of an average fuel rail pressure during the immediately previous injection event.2. The method of claim 1 , further comprising claim 1 , sampling a fuel rail pressure a plurality of times while the direct fuel injector is supplying fuel to the cylinder during the immediately previous injection event.3. The method of claim 2 , wherein the average fuel rail pressure is estimated from the sampled fuel rail pressure a plurality of times during the immediately previous injection event.4. The method of claim 2 , wherein the sampling of fuel rail pressure is continued from a pre-determined time prior to initiation of fuel injection to the cylinder during the immediately previous injection event to another pre-determined time after completion of fuel injection to the cylinder during the immediately previous injection event.5. The method of claim 4 , wherein the average fuel rail pressure is estimated as a function of a first fuel rail pressure estimated at the initiation of fuel injection and a second fuel rail pressure estimated at the completion of fuel ...

FUEL INJECTION DEVICE OF ENGINE

A control device of an engine including a cylinder, a piston, a cylinder head, and a combustion chamber, is provided. The device includes intake and exhaust ports, a swirl control valve, a fuel injection valve attached to the cylinder head to be oriented into the combustion chamber and having first and second nozzle ports, and a control unit. The control unit includes a processor configured to execute a swirl opening controlling module to control the swirl control valve to have a given opening at which a swirl ratio inside the combustion chamber becomes 2 or above, and a fuel injection timing controlling module to control the fuel injection valve to inject fuel at a given timing at which the swirl ratio becomes 2 or above and a swirl flow from a lower portion to a higher portion of the combustion chamber in a side view occurs. 1. A control device of an engine including a cylinder , a piston for reciprocating inside the cylinder along a center axis thereof , a cylinder head , and a combustion chamber formed by the cylinder , the piston , and the cylinder head , comprising:an intake port configured to introduce intake air into the combustion chamber;an exhaust port configured to discharge exhaust gas from the combustion chamber;a swirl control valve provided in an intake passage connected to the intake port;a fuel injection valve attached to the cylinder head, disposed to be oriented into the center of the combustion chamber in a plan view thereof, and having a first nozzle port with a nozzle port axis extending to the exhaust port side in the plan view and a second nozzle port with a nozzle port axis extending to the intake port side in the plan view; anda control unit connected to the fuel injection valve and the swirl control valve and configured to output a control signal to the fuel injection valve and the swirl control valve, respectively, the control unit including a processor configured to execute a swirl opening controlling module to output the control signal ...

Controlling Fuel Injection in an Internal Combustion Engine

Various embodiments include a method for controlling an internal combustion engine comprising: determining a speed of the internal combustion engine; determining a cylinder wall temperature of a combustion cylinder of the internal combustion engine; selecting an injection mode based at least in part on the speed and the cylinder wall temperature; and actuating a fuel injector associated with the combustion cylinder based on the selected injection mode.

CONTROL SYSTEM FOR COMPRESSION-IGNITION ENGINE

A control system for a compression-ignition engine is provided, which includes the engine, a spark plug, a fuel injection valve, an air-fuel ratio control valve, and a control unit. A geometric compression ratio of the engine is 14:1 or above. The control unit includes a processor configured to execute an air-fuel ratio controlling module for, when the engine being in a given operating state is detected, controlling the air-fuel ratio control valve to bring the air-fuel ratio of the entire mixture gas to a given lean air-fuel ratio that is larger than a stoichiometric air-fuel ratio, and an spark plug controlling module for, after this control, outputting the control signal to the spark plug to perform the ignition at a given ignition timing so that the mixture gas starts combustion by flame propagation and then unburned mixture gas self-ignites. The given ignition timing is stored in a memory. 1. A control system for a compression-ignition engine , comprising:an engine including a cylinder, a piston for reciprocating inside the cylinder along a center axis thereof, and a cylinder head, and formed with a combustion chamber defined by the cylinder, the piston, and the cylinder head;a spark plug disposed in the combustion chamber;a fuel injection valve disposed to be oriented into the combustion chamber;an air-fuel ratio control valve configured to adjust an air-fuel ratio of mixture gas inside the combustion chamber; anda control unit connected to the spark plug, the fuel injection valve, and the air-fuel ratio control valve and configured to output a control signal to the spark plug, the fuel injection valve, and the air-fuel ratio control valve,wherein a geometric compression ratio of the engine is 14:1 or above, and an air-fuel ratio controlling module to, when the engine being in a given operating state is detected, control the air-fuel ratio control valve to bring the air-fuel ratio of the entire mixture gas inside the combustion chamber to a given lean air-fuel ...

METHOD AND APPARATUS FOR CONTROLLING OPERATION OF AN INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a plasma ignition system having an in-cylinder dielectric barrier-discharge igniter, and a direct-injection fuel injector having an in-cylinder fuel nozzle. The fuel nozzle protrudes into the combustion chamber proximal to the igniter. A controller operatively connects to the internal combustion engine, the plasma ignition system and the fuel injection system. The controller controls the internal combustion engine at an air/fuel ratio that is lean of stoichiometry. The fuel injector injects a first fuel pulse prior to activation of the igniter, and then the igniter initiates a plasma energy pulse. The fuel injector is controlled to inject a second fuel pulse during the plasma energy pulse. 1. An internal combustion engine system , comprising: a plasma ignition system including a barrier-discharge igniter having a tip portion protruding into a combustion chamber of the internal combustion engine, and', 'a fuel injection system including a direct-injection fuel injector including a fuel nozzle protruding into the combustion chamber proximal to the tip port of the igniter; and, 'an internal combustion engine, including control the internal combustion engine to operate at an air/fuel ratio that is lean of stoichiometry,', 'control the fuel injector to inject a first fuel pulse prior to activation of the igniter during each engine cycle,', 'control the igniter to initiate a plasma energy pulse, and', 'control the fuel injector to inject a second fuel pulse during the plasma energy pulse., 'a controller operatively connected to the internal combustion engine, the plasma ignition system and the fuel injection system, the controller including executable code operative to2. The internal combustion engine of claim 1 , wherein the direct-injection fuel injector mounted on the cylinder head and protruding into the combustion chamber proximal to the igniter further comprises:the fuel injector centrally located in the cylinder head, wherein ...

DIESEL ENGINE SYSTEM

A diesel engine system has a piston in which a cavity is formed in a crown surface. The cavity has a bottom part, a peripheral part dented so as to be convex radially outward in a cross-sectional view, and a lip part formed above the peripheral part and protruding so as to be convex radially inward in the cross-sectional view. An injection controller causes an injector to perform, during operation in a given operating range, a main injection in which injected fuel is directed to the lip part, and an after-injection in which a smaller amount of fuel than the main injection is injected at a given period later than the main injection in an expansion stroke. An injection interval period that is a period of time from an end of the main injection to a start of the after-injection is shorter as an injection pressure of fuel increases. 1. A diesel engine system , comprising:a cylinder;a piston reciprocatably accommodated in the cylinder;an injector configured to inject fuel containing diesel fuel into a combustion chamber that is a space above the piston;an injection pressure acquirer configured to acquire an injection pressure of the fuel injected from the injector; andan injection controller configured to control the injector so that the fuel is injected at a plurality of timings set from a compression stroke to an expansion stroke, during operation of the engine system in a given operating range, a bottom part formed so that a height thereof becomes lower while extending radially outward;', 'a curved peripheral part formed radially outward of the bottom part and dented so as to be convex radially outward in a cross-sectional view including a cylinder axis; and', 'a curved lip part formed above the peripheral part and protruding so as to be convex radially inward in the cross-sectional view,, 'wherein the piston has a cavity dented downwardly in a crown surface thereof, the cavity having, as wall surfaces defining the cavitywherein the injector is provided so as to inject ...

DIESEL ENGINE SYSTEM

A diesel engine system is provided, which includes a piston having a cavity dented downwardly in a crown surface thereof and having a bottom part, a peripheral part dented so as to be convex radially outward, and a lip part formed above the peripheral part and protruding so as to be convex radially inward in a cross-sectional view. An injection controller causes an injector to perform, during operation in a given operating range, a main injection in which injected fuel is directed to the lip part, and an after-injection in which a smaller amount of the fuel than the main injection is injected at a given timing later than the main injection in an expansion stroke. An injection interval period from an end of the main injection to a start of the after-injection is shorter as a temperature parameter related to a progress of a warmup of engine increases. 1. A diesel engine system , comprising:a cylinder;a piston reciprocatably accommodated in the cylinder;an injector configured to inject fuel containing diesel fuel into a combustion chamber that is a space above the piston;a temperature sensor configured to detect a given temperature parameter that becomes higher as a warmup of a diesel engine progresses; andan injection controller configured to control the injector so that fuel is injected at a plurality of timings set from a compression stroke to an expansion stroke during operation of the engine system in a given operating range, a bottom part formed so that a height thereof becomes lower while extending radially outward,', 'a curved peripheral part formed radially outward of the bottom part and dented so as to be convex radially outward in a cross-sectional view including a cylinder axis, and', 'a curved lip part formed above the peripheral part and protruding so as to be convex radially inward in the cross-sectional view,, 'wherein the piston has a cavity dented downwardly in a crown surface thereof, the cavity having, as wall surfaces defining the cavity,'}wherein ...

SPLIT DIRECT INJECTION FOR REACTIVATED CYLINDERS OF AN INTERNAL COMBUSTION ENGINE

A vehicle, engine controller and method for coordinating direct split injection of two or more pulses of fuel during a working cycle of a reactivated cylinder which was deactivated in a previous working cycle is described. By using split injection for the reactivated cylinder, the particulate matter and particulate number (“PM/PN”) generated by the reactivated cylinder is reduced. 1. A vehicle , comprising:an internal combustion engine having a cylinder;a direct fuel injector; andan engine controller configured to:(a) deactivate the cylinder during a first working cycle;(b) activate the cylinder during a second working cycle that follows the first working cycle; and(c) direct the fuel injector to inject two or more pulses of fuel into the cylinder during the second working cycle.2. The vehicle of claim 1 , wherein the engine controller makes a decision to direct the fuel injector to inject the two or more pulses at least partially based on a firing history of the cylinder.3. The vehicle of claim 1 , wherein the engine controller makes a decision to direct the fuel injector to inject the two or more pulses during the second working cycle at least partially based on whether a temperature of the cylinder is below a threshold temperature.4. The vehicle of claim 3 , wherein the engine controller is further arranged to direct the fuel injector to inject the two or more pulse into the cylinder during one or more active working cycles claim 3 , following the second working cycle claim 3 , until the temperature of the cylinder exceeds the threshold temperature.5. The vehicle of claim 4 , wherein the engine controller is further arranged to direct the fuel injector to inject only a single pulse into the cylinder during a subsequent active working cycle claim 4 , following the one or more active working cycles claim 4 , when the temperature of the cylinder exceeds the threshold temperature.6. The vehicle of claim 1 , wherein the second working cycle includes an intake stroke ...

SYSTEM AND METHOD FOR COMPENSATING CETANE

Methods and systems for adjusting a plurality of fuel injections supplied to a cylinder during a cycle of the cylinder are described. In one example, fuel amounts are moved between fuel injections in response to combustion phase. Engine feedgas hydrocarbons and/or carbonaceous particulate matter may be reduced when cetane of combusted fuel changes. 1. A method for operating an engine , comprising:injecting fuel in at least two fuel injection events during a cycle of a cylinder; andadjusting fuel amounts and a number of fuel injections between the at least two fuel injection events in response to a combustion phase of the engine, including increasing the number as a cetane of the fuel is lowered.2. The method of claim 1 , where injecting fuel in the at least two fuel injection events comprises injecting fuel to the cylinder in three separate fuel pulses claim 1 , and where timing of an early fuel injection is retarded in response to an advanced combustion phase that is related to the fuel's cetane number.3. The method of claim 1 , where adjusting fuel amounts between the at least two fuel injection events comprises reducing an early fuel injection event by a first fuel amount and adding the first fuel amount to a late fuel injection event.4. The method of claim 1 , where adjusting the fuel amounts between the at least two fuel injection events comprises increasing an early fuel injection event by a first fuel amount and reducing a late fuel injection event by the first fuel amount.5. The method of claim 1 , further comprising adjusting the number of fuel injections to three or more fuel injections.6. The method of claim 1 , where adjusting the number of fuel injections comprises reducing the number of fuel injections from three fuel injections to two fuel injections.7. The method of claim 5 , where adjusting the number of fuel injections comprises increasing the number of fuel injections from three fuel injections to four fuel injections.8. The method of claim 5 , ...

FUEL INJECTION CONTROL DEVICE FOR DIRECT INJECTION ENGINE

Disclosed herein is a fuel injection control device for a direct injection engine including an engine body (engine ) and a fuel injection control unit (engine controller ). The fuel injection control unit injects a fuel in a predetermined injection mode into a combustion chamber () such that while the engine body is warm, an air-fuel mixture layer and a heat-insulating gas layer, surrounding the air-fuel mixture layer, are formed in the combustion chamber at a point in time when an air-fuel mixture ignites, and changes the injection mode of the fuel into the combustion chamber such that while the engine body is cold, the lower the temperature of the engine body is, the thinner the heat-insulating gas layer becomes. 1. A fuel injection control device for a direct injection engine , the control device comprising:an engine body including a combustion chamber defined by a cylinder head ceiling portion, a cylinder provided for a cylinder block, and a piston reciprocating inside the cylinder; anda fuel injection control unit which includes a fuel injection valve, provided inside the combustion chamber to inject a liquid fuel, and which is configured to inject the fuel into the combustion chamber at a predetermined timing, whereinthe fuel injection control unit is configured toinject the fuel in a predetermined injection mode into the combustion chamber such that while the engine body is in a warm state where the temperature of the engine body has reached or exceeded a predetermined temperature, an air-fuel mixture layer and a heat-insulating gas layer, surrounding the air-fuel mixture layer, are formed in the combustion chamber at a point in time when an air-fuel mixture ignites, andchange the injection mode of the fuel into the combustion chamber such that while the engine body is in a cold state where the temperature of the engine body is less than the predetermined temperature, the lower the temperature of the engine body is, the thinner the heat-insulating gas layer ...

ACTUATION OF FUEL INJECTORS FOR MULTIPLE INJECTIONS

A method for actuating a fuel injector having a magnetic coil drive for an internal combustion engine of a motor vehicle is disclosed. The fuel injector has a first terminal and a second terminal, where the first terminal is connectable via a switch element to ground and the second terminal is connected to ground. The method includes the following: actuating the switch element to connect the first terminal to ground, acquiring a time curve of the current strength of a current flowing through the magnetic coil drive, and applying a voltage pulse to the magnetic coil drive to initiate an opening procedure of the fuel injection. A duration of the voltage pulse is established as a function of the acquired time curve of the current strength. Furthermore, an engine controller and a computer program are described. 1. A method for actuating a fuel injector for an internal combustion engine of a motor vehicle , the fuel injector comprising a magnetic coil drive , a first terminal and a second terminal , the first terminal is connectable via a switch element to ground and the second terminal is connected to ground , the method comprising:actuating the switch element to connect the first terminal to ground;acquiring a time curve of the current strength of a current flowing through the magnetic coil drive; andapplying a voltage pulse to the magnetic coil drive to initiate an opening procedure of the fuel injector,wherein a duration of the voltage pulse is established as a function of the acquired time curve of the current strength.2. The method of claim 1 , wherein the second terminal is connected to ground by a diode.3. The method of claim 1 , wherein the voltage pulse is ended at a time at which the current strength of the current flowing through the magnetic coil drive reaches a defined value.4. The method of claim 3 , wherein the defined value is established as a function of the acquired time curve of the current strength.5. The method of claim 1 , wherein the switch ...

Method and system for selecting a cylinder for engine starting

A method and system for improving starting of an engine is presented. In one example, the method selects a first cylinder to receive fuel since engine stop the cylinder's position relative to the cylinder's top-dead-center compression stroke. The method also describes adjusting a number of fuel injections for a first combustion event since engine stop.

METHOD OF CONTROLLING AN INJECTION DWELL TIME BETWEEN TWO INJECTIONS OF A FUEL INJECTOR

A system and method of controlling the hydraulic dwell time between a first injection and a second injection performed by a fuel injector of an internal combustion engine are disclosed, in which the injector is equipped with a needle operated by a control valve. A value of a nominal electric dwell time between the first injection and the second injection is determined. An actual instant of hydraulic closing of the fuel injector after the first injection is also determined. A corrected electric dwell time is calculated as a function of the nominal electric dwell time and the actual instant of hydraulic closing of the fuel injector after the first injection. The fuel injector is operated using the corrected electric dwell time. 112-. (canceled)13. A method of controlling the hydraulic dwell time between a first injection and a second injection performed by a fuel injector of an internal combustion engine , wherein the injector is equipped with a needle operated by a control valve , the method comprising:determining a value of a nominal electric dwell time between the first injection and the second injection;determining an actual instant of hydraulic closing of the fuel injector after the first injection;calculating a corrected electric dwell time as a function of the nominal electric dwell time and the actual instant of hydraulic closing of the fuel injector after the first injection;operating the fuel injector using the corrected electric dwell time.14. The method according to claim 13 , wherein the actual instant of hydraulic closing of the fuel injector after the first injection is determined with an estimation procedure using a map that correlates an energizing time of the injector with a needle closing time of the injector.15. The method according to claim 14 , wherein the map is used to determine a nominal injector needle closing time value as a function of a nominal energizing time of the injector and to determine a corrected needle closing time value as a ...

DRIVE DEVICE FOR FUEL INJECTION DEVICE

Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. 1. A control device of a fuel injection device , comprising:a valve;a coil which generates a magnetic attraction force to attract a movable member which drives the valve; anda voltage source,wherein the fuel injection device applies a voltage to the coil on the basis of an injection pulse, causes a drive current to flow to the coil until the current becomes a maximum current to attract the movable member, and drives the valve to inject fuel,the drive current flowing to the coil or a voltage of the voltage source is detected before the injection pulse is stopped, and, in a case where the detected drive current or the voltage is equal to or less than a setting, a width of the injection pulse or an injection pulse different from the injection pulse is corrected to be long, or a voltage is applied to the coil from another voltage source of which a voltage value is higher than the voltage source.2. The control device of the fuel injection device according to claim 1 , comprising:a low-voltage source which is the voltage source; anda high-voltage source of which a voltage value is higher than the low-voltage source,wherein, after the drive current flowing to the coil reaches the maximum current and before the injection pulse is stopped, the drive current flowing to the coil or a voltage of the low-voltage source is detected, and, in a case where the detected drive current or the voltage is equal to or less than the setting, a width of the injection pulse or an injection pulse different from the injection pulse is corrected to be long.3. The control device of the fuel injection device according to claim 1 , comprising:a low-voltage source; anda high-voltage source which is the voltage source and has a voltage value higher than the low-voltage source,wherein, before the injection ...

FOUR-STROKE INTERNAL COMBUSTION ENGINE AND METHOD OF OPERATING FOUR-STROKE INTERNAL COMBUSTION ENGINE

Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston. 1. A method of operating a four-stroke direct injection internal combustion engine comprising at least one cylinder arrangement , a crankshaft , and a camshaft , the cylinder arrangement comprising a combustion chamber , a fuel injector , an exhaust valve , a cylinder bore , and a piston configured to reciprocate in the cylinder bore and being connected to the crankshaft , wherein the camshaft is configured to control the opening and closing of the exhaust valve , wherein a timing of the camshaft is controllable , and wherein the method comprises:changing the timing of the camshaft to advance a closing of the exhaust valve;performing a first fuel infection during a compression stroke of the piston;performing a second fuel infection during a power stroke of the piston; andperforming a third fuel infection step, after the second fuel infection, during the power stroke of the piston.2. The method according to claim 1 , wherein the first fuel infection step comprises at least two individual fuel infection operations.3. The method according to claim 1 , wherein the third fuel infection step takes place after opening of the exhaust valve during the power stroke.4. The method according to claim 1 , wherein the second fuel infection step comprises at least two individual fuel injection operations (IV claim 1 , V).5. The method according to claim 1 , wherein changing the timing of the camshaft comprises:changing the timing to advance the closing of the exhaust valve at least 60 ...

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE AND ELECTRONIC CONTROL UNIT FOR AN INTERNAL COMBUSTION ENGINE

A method for operating an internal combustion engine is provided in which fuel is withdrawn from a high-pressure accumulator and injected into a combustion chamber of at least one cylinder of the internal combustion engine, the method including the steps of detecting under conditions of angular synchronism a pressure of the fuel in the high-pressure accumulator during a first injection into the at least one cylinder and during a later, second injection into the at least one cylinder; ascertaining a gradient of the detected pressure; ascertaining a frequency-transformed spectrum of the detected pressure and a frequency-transformed spectrum of the ascertained gradient; correcting the frequency-transformed spectrum of the detected pressure by the frequency-transformed spectrum of the ascertained gradient; and ascertaining a cylinder-individual injection quantity of fuel, which was injected into the at least one cylinder, from the corrected frequency-transformed spectrum of the detected pressure. 1. A method for operating an internal combustion engine in which fuel is withdrawn from a high-pressure accumulator and injected into a combustion chamber of at least one cylinder of the internal combustion engine , the method comprising:detecting, under conditions of angular synchronism, a pressure of the fuel in the high-pressure accumulator during a first injection into the at least one cylinder and during a later, second injection into the at least one cylinder;ascertaining a gradient of the detected pressure;ascertaining a frequency-transformed spectrum of the detected pressure and a frequency-transformed spectrum of the ascertained gradient;correcting the frequency-transformed spectrum of the detected pressure by the frequency-transformed spectrum of the ascertained gradient; andascertaining a cylinder-individual injection quantity of the fuel, which was injected into the at least one cylinder, from the corrected frequency-transformed spectrum of the detected pressure.2. ...

SYSTEMS AND METHODS FOR CONTROLLING FLUID INJECTIONS

A vehicle includes a combustion engine having at least one cylinder to burn a fuel, and a fuel injector to supply a fuel mass to the at least one cylinder. The vehicle also includes a controller programmed to cause the fuel injector supply a series of fuel pulses that sum to an aggregate target fuel mass. The controller is also programmed to adjust a commanded duration of a subsequent pulse of the series of pulses from a target pulse duration value based on at least one of a dwell time since a preceding pulse, a fuel mass of the preceding pulse, and an opening delay of the preceding pulse. 1. A vehicle comprising:a combustion engine having at least one cylinder to burn a fuel;a fuel injector to supply an aggregate target fuel mass to the at least one cylinder; and cause the fuel injector to supply a series of fuel pulses that sum to the aggregate target fuel mass, and', 'adjust a commanded duration of a subsequent pulse of the series of pulses from a target pulse duration value based on at least one of dwell time since a preceding pulse, a fuel mass of the preceding pulse, and an opening delay of the preceding pulse., 'a controller programmed to'}2. The vehicle of wherein the controller is further programmed to modify the duration of the subsequent pulse in response to the dwell time since the preceding pulse being less than a dwell threshold.3. The vehicle of wherein the controller is further programmed to modify the subsequent pulse based on an opening delay calculated using a target dwell time since the preceding pulse and a fuel mass of the preceding pulse.4. The vehicle of wherein the controller is further programmed to claim 1 , in response to a target fuel mass of the subsequent pulse being less than a mass threshold claim 1 , apply an adjustment to a parameter of the subsequent pulse based on a fuel mass region that is greater than the mass threshold.5. The vehicle of wherein the controller is further programmed to adjust the commanded duration of the ...

METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE

The disclosure relates to a method for operating an internal combustion engine having a plurality of cylinders, the method comprising, during one working cycle, distributing fuel for each cylinder of the plurality of cylinders among a plurality of injection processes according to settable split factors which respectively define a setpoint fuel mass and/or injection duration and time setting of each respective injection process for the plurality of individual injection processes, wherein random variation is carried out for at least one injection process. 1. A method for operating an internal combustion engine having a plurality of cylinders , the method comprising:during one working cycle, distributing fuel for each cylinder of the plurality of cylinders among a plurality of injection processes according to settable split factors which respectively define a setpoint fuel mass and/or injection duration and time setting of each respective injection process for the plurality of individual injection processes,wherein random variation is carried out for at least one injection process, and wherein the random variation of the setpoint fuel mass takes place for at least two injection processes to reduce pressure waves in comparison with an analogous operation without the random variation.2. The method as claimed in claim 1 , wherein the random variation takes place in the time setting for at least one injection process.3. The method as claimed in claim 1 , wherein the random variation of the setpoint fuel mass takes place for at least two injection processes in a predefined tolerance range.4. The method as claimed in claim 1 , wherein the random variation of the setpoint fuel mass takes place for each of the cylinders in such a way that a sum of the setpoint fuel masses which are to be injected in all the injection processes remains unchanged for the respective cylinder.5. The method as claimed in claim 1 , wherein said method also includes generating a fault message as a ...

INTERNAL COMBUSTION ENGINE CONTROL DEVICE, INTERNAL COMBUSTION ENGINE CONTROL METHOD, AND VEHICLE

An internal combustion engine control device includes a combustion degree of stoppage determination unit which determines whether stoppage of combustion of an internal combustion engine has reached a threshold degree, and an internal combustion engine control unit which performs a normal control in the case that the combustion of the engine is resumed in a state where stoppage of combustion has not reached the threshold degree, and performs a soot suppression control in the case that the engine combustion is resumed in a state where stoppage of combustion has reached the threshold degree. In the soot suppression control, the split injection or the single injection is carried out within the predetermined stroke, and the engine control unit causes a fuel injection timing in the single injection of the soot suppression control to be delayed with respect to the fuel injection timing in the single injection of the normal control. 1. An internal combustion engine control device configured to control an internal combustion engine which is configured to selectively perform a single injection in which fuel is injected into a combustion chamber a single time within a predetermined stroke , and a split injection in which the fuel is injected into the combustion chamber a plurality of times within the predetermined stroke , the internal combustion engine control device comprising:a combustion degree of stoppage determination unit configured to determine whether or not stoppage of combustion of the internal combustion engine has reached a threshold degree; andan internal combustion engine control unit configured to perform a normal control in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of combustion has not reached the threshold degree, and to perform a soot suppression control to suppress generation of soot in a case that the combustion of the internal combustion engine is resumed in a state in which the stoppage of ...

Controller for internal combustion engine and method for controlling internal combustion engine

A controller for controlling an internal combustion engine includes an injection amount calculation portion that calculates a base injection amount, an injection amount correction portion that corrects the base injection amount to calculate first and second corrected injection amounts, and an injection count determination portion that determines first and second fuel injection counts, which are respectively a number of times fuel is injected from first and second fuel injection valves. When the first and second corrected injection amounts are respectively calculated using the same base injection amount, the injection count determination portion sets the first fuel injection count corresponding to the first corrected injection amount to be equal to the second fuel injection count corresponding to the second corrected injection amount.

PRE-REGULATOR FOR AN LDO

An electronic device includes a voltage regulator circuit having a power NFET coupled between an upper supply voltage and a pre-regulator output node and a current source coupled in series with a diode element between the upper supply voltage and a lower supply voltage. A gate of the power NFET is coupled to a first node between the current source and a diode element. A bypass circuit includes a power PFET coupled between the upper supply voltage and the pre-regulator output node. A comparison circuit is coupled to turn the bypass circuit off when the upper supply voltage is greater than a regulation threshold voltage. 1. A voltage regulator circuit comprising:(a) a voltage input, a regulated output, and a ground plane;(b) a first power transistor having a first drain, a first gate, and a first source, the first drain and the first source being coupled between the voltage input and the regulated output;(c) a second power transistor having a second drain, a second gate, and a second source, the second source and the second drain being coupled between the voltage input and the regulated output;(d) a diode element coupled between the first gate and the ground plane; and(e) a comparison circuit having an input coupled to the voltage input, having a reference voltage input, and having a first output coupled to the second gate.2. The voltage regulator circuit of :in which the comparison circuit has a second output; andincluding a pullup circuit having an input coupled to the voltage input, having an input coupled to the second output, and having an output coupled to the output of the comparison circuit and to the second gate.3. The voltage regulator circuit of including a current source and a first capacitor coupled in series between the voltage input and the ground plane and including a first node between the current source and the capacitor that is coupled to the diode element and the first gate.4. The voltage regulator circuit of including a second capacitor coupled ...

NATIVE FUEL MODULE FOR SPARK IGNITION FUEL INJECTED ENGINES

Some embodiments of the present disclosure include a system for allowing spark ignition fuel injected engines to function on a plurality of fuels. The system may include an engine system including an engine control module operatively attached to a fuel injector, and a fuel tank attached to the fuel injector, a fuel content sensor configured to sense a content of a fuel in the engine system before combustion of the fuel, and a fuel control module placed inline with the fuel injector and the fuel content sensor, the fuel control module configured to receive fuel content information from the fuel content sensor and make a change to the fuel injector pulse width based on the fuel content information, if necessary. 1. A system for engagement with a spark ignition fuel injection system , the spark ignition fuel injection system including an engine system comprising an engine control module operatively attached to a fuel injector , and a fuel tank attached to the fuel injector , the system comprising:a fuel content sensor positioned externally of the fuel tank and configured to sense a content of fuel in the engine system before combustion of the fuel; anda fuel control module placed inline with the fuel injector and the fuel content sensor, the fuel control module configured to receive fuel content information from the fuel content sensor and make a change to the fuel injector pulse width based on the fuel content information.2. The system of claim 1 , wherein the fuel content sensor is communicatively coupled to the fuel control module by a signal channel.3. The system of claim 1 , wherein the fuel control module is communicatively coupled with the engine control module.4. The system of claim 1 , wherein the fuel control module is communicatively disposed between the engine control module and the fuel injector.5. The system of claim 4 , wherein the fuel control module is adapted to derive a measurement value from an instance of a fuel content information received from ...

INTERNAL-COMBUSTION ENGINE

An internal-combustion engine includes: a direct fuel injector directly injecting fuel into a combustion chamber; and a control device. The control device performs: presumption processing that presumes, based on an operating condition of the internal-combustion engine, that a thermoplastic deposit is formed on an injection hole portion of the direct fuel injector; temperature control processing that increases a temperature of the injection hole portion when the thermoplastic deposit is presumed to be formed; and first removal processing that injects the fuel from the direct fuel injector after the temperature control processing. 1. An internal-combustion engine comprising:a direct fuel injector directly injecting fuel into a combustion chamber; anda control device, whereinthe control device performs:presumption processing that presumes, based on an operating condition of the internal-combustion engine, that a thermoplastic deposit is formed on an injection hole portion of the direct fuel injector;temperature control processing that increases a temperature of the injection hole portion when the thermoplastic deposit is presumed to be formed; andfirst removal processing that injects the fuel from the direct fuel injector after the temperature control processing.2. The internal-combustion engine according to claim 1 ,wherein during a normal operation of the internal-combustion engine, the control device performs normal fuel injection control to control fuel injection from the direct fuel injector, andwherein in the first removal processing, the control device performs the normal fuel injection control.3. The internal-combustion engine according to claim 1 , further comprising a port fuel injector injecting fuel into an intake port claim 1 ,wherein in the temperature control processing, the control device decreases an amount of fuel injection from the direct fuel injector while increases an amount of fuel injection from the port fuel injector.4. The internal-combustion ...

METHOD TO CONTROL IN ANY POSSIBLE OPERATING POINT THE COMBUSTION OF A COMPRESSION IGNITION INTERNAL COMBUSTION ENGINE WITH REACTIVITY CONTROL THROUGH THE FUEL INJECTION TEMPERATURE

A method to control the combustion of a compression ignition engine having the steps of: establishing, for each combustion cycle, a fuel quantity to be injected into the cylinder; injecting a first fraction of the fuel quantity; heating a second fraction of the fuel quantity, which is equal to the remaining fraction of the fuel quantity, to an injection temperature higher than 100° C.; injecting the second fraction of the fuel quantity heated to the injection temperature into the cylinder at the end of the compression stroke and at no more than 60° from the top dead centre; and decreasing the injection temperature and the ratio between the second fraction and the first fraction as the internal combustion engine increases and as the rotation speed of the internal combustion engine increases. 11172. A method to control in any possible operating point the combustion of a compression ignition internal combustion engine (); the internal combustion engine () is provided with at least one piston () , which slides , with a reciprocating motion , on the inside of a cylinder () , so as to carry out a succession of combustion cycles , each comprising at least an intake stroke and a compression stroke; the control method comprises the steps of:{'b': '1', 'determining the operating point constituted by a load and by a rotation speed of the internal combustion engine ();'}{'b': '2', 'establishing, for each combustion cycle, a fuel quantity (Q) to be injected into the cylinder ();'}{'b': 9', '11', '1, 'injecting a first fraction of the fuel quantity (Q) at least partially during the intake and/or compression stroke by means of a first fuel injector (; ), which receives the fuel from a first supplying system without active heating devices, so that the first fraction (F) of the fuel quantity (Q) has a temperature that is lower than an injection temperature (T) higher than 100° C.;'}{'b': '2', 'heating a second fraction (F) of the fuel quantity (Q), which is equal to the remaining ...

CONTROL DEVICE FOR COMPRESSION SELF-IGNITION ENGINE

A control device for a compression self-ignition engine includes a fuel injection system and an injection controller. While the engine is operated by CI combustion under a given first condition, a first injection is carried out in which fuel is injected at a first timing in a compression stroke and at which the fuel goes toward a part radially outward of a cavity formed in a crown surface of a piston, and a second injection is suspended. While the engine is operated by the CI combustion under a second condition in which a temperature inside a combustion chamber at a close timing of an intake valve becomes lower than the first condition, at least the second injection is carried out in which the fuel is injected at a second timing later than the first timing in the compression stroke and at which the fuel goes toward the cavity. 1. A control device for a compression self-ignition engine including a cylinder , a piston fitted in the cylinder and having a concave cavity formed in a crown surface thereof , and an intake valve configured to open and close an intake port configured to introduce intake air into a combustion chamber defined by the cylinder and the piston , the engine being configured to execute compression self-ignition (CI) combustion in which a mixture gas of fuel and air combusts inside the combustion chamber by self-ignition , the control device comprising:a fuel injection system configured to inject fuel from a ceiling surface of the combustion chamber into the combustion chamber; andan injection controller configured to cause the fuel injection system to carry out a first injection to inject fuel at a first timing in a compression stroke, and a second injection to inject fuel at a second timing later than the first timing in the compression stroke, while executing the CI combustion,wherein the first timing is set at a timing when the fuel injected from the fuel injection system goes toward a part radially outward of the cavity, and the second timing is ...

Fuel injection control apparatus for internal combustion engine

In an in-cylinder injection spark-ignition internal combustion engine, in which fuel is injected toward a cavity formed in a crown surface of a piston, when split injection for dividing and injecting the fuel for plural times is performed during a compression stroke, an arrival lift amount that is a maximum value of displacement of a valve body of a fuel injection valve during fuel injection is set as a larger value at least in a first period as a crank angle of the internal combustion engine approaches compression top dead center.

Methods and systems for adjusting a direct fuel injector

Systems and methods for improving fuel injection of an engine that includes a cylinder receiving fuel from two different fuel injectors is disclosed. In one example, a transfer function or gain of a direct fuel injector is adjusted in response to an exhaust lambda value and a first pulse width of two pulse widths provided to an injector of a cylinder during a cylinder cycle.

METHODS AND SYSTEMS FOR LEARNING VARIABILITY OF A DIRECT FUEL INJECTOR

Systems and methods for improving fuel injection of an engine that includes a cylinder receiving fuel from a direct fuel injector are disclosed. In one example, a transfer function or gain of a direct fuel injector is adjusted in response to an exhaust lambda value and a pulse width of a plurality of split fuel injections provided to an injector of the cylinder during a cylinder cycle. 1. A method for a cylinder , comprising:splitting injection of a fuel amount into a plurality of injections during a cylinder cycle in response to a request to characterize a control parameter of a fuel injector delivering fuel to the cylinder;adjusting the control parameter based on an exhaust lambda value; andoperating the fuel injector based on the adjusted control parameter.2. The method of claim 1 , wherein each pulse width supplied to the injector for delivering each of the plurality of injections operates the injector in a non-linear operating region.3. The method of claim 2 , wherein the non-linear operating region is an operating region where fuel flow through the fuel injector is non-linear.4. The method of claim 3 , wherein splitting the fuel amount is based on delivering an equal split fuel amount during each of the plurality of injections.5. The method of claim 1 , wherein the control parameter is a fuel injector gain or a fuel injector transfer function.6. The method of claim 1 , wherein the adjusted control parameter is stored to memory.7. The method of claim 1 , wherein the fuel injector is a direct fuel injector claim 1 , and wherein the plurality of injections are based on providing an engine lambda value of one.8. The method of claim 1 , wherein in response to the request to characterize the control parameter of the injector claim 1 , the fuel injector is operated at a constant rail pressure and an engine including the cylinder is operated at a constant speed and air mass.9. A method for a cylinder claim 1 , comprising:operating an engine including the cylinder at a ...

METHODS AND SYSTEMS FOR ADJUSTING A DIRECT FUEL INJECTOR

Systems and methods for improving fuel injection of an engine that includes a cylinder receiving fuel from a direct fuel injector are disclosed. In one example, a transfer function or gain of a direct fuel injector is adjusted in response to an exhaust lambda value and a first pulse width of two pulse widths provided to an injector of a cylinder during a cylinder cycle. 1. A method for a cylinder , comprising: delivering a first pulse width and a second pulse width to a fuel injector supplying fuel to the cylinder during a cylinder cycle;', 'varying a ratio of the first pulse width to the second pulse width; and', 'determining an injector transfer function based on the ratio and an engine lambda value; and, 'during a learning condition,'}adjusting a control parameter of the injector based on the transfer function.2. The method of claim 1 , wherein the control parameter of the fuel injector is a fuel injector gain.3. The method of claim 2 , wherein varying the ratio includes decreasing the first pulse width and increasing the second pulse width.4. The method of claim 3 , wherein the second pulse width is greater than the first pulse width claim 3 , and wherein the first pulse width is supplied to the injector for delivering a first fuel injection claim 3 , and the second pulse width is supplied to the injector for delivering a second fuel injection.5. The method of claim 4 , wherein the first pulse width operates the injector in a ballistic region where flow through the injector is non-linear claim 4 , and wherein the second pulse width operates the injector in a non-ballistic region.6. The method of claim 5 , wherein the fuel injector is a direct fuel injector claim 5 , and wherein the first and the second pulse widths are based on obtaining a stoichiometric engine lambda value of one.7. The method of claim 1 , wherein the first fuel injection is delivered prior to the second fuel injection claim 1 , and wherein the first and the second fuel injections are separated ...

Drive control device for internal combustion engine

An internal combustion engine includes: a fuel injection valve injecting fuel; an intake timing varying mechanism controlling the opening/closing of an intake valve provided at an intake port; and an exhaust timing varying mechanism controlling the opening/closing of an exhaust valve provided at an exhaust port. When a request has been made to reduce a fuel wet amount, which is a quantity of fuel adhering to a wall surface of the internal combustion engine facing to an injection field where fuel is injected, in the startup of the internal combustion engine, the control device executes wet reduction control. In the wet reduction control, at least one of the intake timing varying mechanism or the exhaust timing varying mechanism is controlled so as to reduce the fuel wet amount by a counterflow blowing back toward the intake port.

Controller for internal combustion engine and method for controlling internal combustion engine

A controller for an internal combustion engine includes processing circuitry. The processing circuitry performs a dither control process and a multi-injection process. Multiple injections in the multi-injection process includes a first injection and a second injection performed at a timing retarded from the first injection. The dither control process includes at least one of a process performed on a cylinder changed to a lean combustion cylinder so that a reduction amount of fuel injected through the first injection is greater than a reduction amount of fuel injected through the second injection and a process performed on a cylinder changed to a rich combustion cylinder so that an increase amount of fuel injected through the first injection is greater than an increase amount of fuel injected through the second injection.

FUEL AMOUNT DISTRIBUTION METHOD FOR AN ENGINE WITH A DUAL INJECTOR

A fuel amount distribution method is provided to distribute fuel to a plurality of injectors on each of multiple cylinders of an engine with a dual injector. The fuel amount distribution method includes performing, by a controller, a single injection operation in which a single injector of the plurality of injectors constituting the dual injector injects fuel into a corresponding cylinder when a required fuel injection time of the dual injector of at least one cylinder of the multiple cylinders is less than a minimum injection time of each injector of the plurality of injectors of the dual injector. Thereby, precise air-fuel control in a low fuel rate section is achieved. 1. A fuel amount distribution method for distributing fuel to a plurality of injectors provided on each of multiple cylinders of an engine with a dual injector , the method comprising:performing, by a controller, a single injection operation in which a single injector of the plurality of injectors constituting a dual injector injects fuel into a corresponding cylinder when a required fuel injection time of the dual injector of at least one cylinder of the multiple cylinders is less than a minimum injection time of each injector of the plurality of injectors of the dual injector.2. The fuel amount distribution method of claim 1 , further comprising:setting the minimum injection time of each of the injectors as a fuel injection time when determined that a total required injection time obtained by adding the injection times of each of the injectors of the corresponding cylinder is equal to or less than the minimum injection time of each of the injectors constituting the dual injector.3. The fuel amount distribution method of claim 2 , further comprising:compensating for the set fuel injection time utilizing a preset compensation map, when a fuel injector operation is converted from a dual injection operation of injecting fuel from the plurality of injectors into the single injector operation using the ...

FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION CONTROL METHOD

The present invention provides a high-efficiency and highly-reliable fuel injection control device that controls a fuel injection valve of an internal combustion engine and can perform injection amount control in accordance with a deterioration degree of the fuel injection valve. A fuel injection control device controlling a fuel injection valve of an internal combustion engine includes a deterioration determination unit that determines a deterioration state of the fuel injection valve, an injection amount learning unit that learns the injection amount of the fuel injection valve, and a learning frequency change unit that changes the learning frequency of the injection amount learning unit in accordance with the deterioration state of the fuel injection valve. 1. A fuel injection control device controlling a fuel injection valve of an internal combustion engine , the device comprising:a deterioration determination unit that determines a deterioration state of the fuel injection valve;an injection amount learning unit that learns the injection amount of the fuel injection valve; anda learning frequency change unit that changes the learning frequency of the injection amount learning unit in accordance with the deterioration state of the fuel injection valve.2. The fuel injection control device according to claim 1 ,wherein in the case where the integrated value of injection count numbers of the fuel injection valve is smaller than a predetermined threshold value, the deterioration determination unit determines as a running-in period of the fuel injection valve, andwherein the learning frequency change unit increases the learning frequency of the injection amount learning unit.3. The fuel injection control device according to claim 1 ,wherein in the case where the integrated value of injection count numbers of the fuel injection valve falls within a predetermined range, the deterioration determination unit determines that the fuel injection valve is not deteriorated, ...

METHOD AND DEVICE FOR CALIBRATING POST-INJECTIONS OF AN INTERNAL COMBUSTION ENGINE

A method for calibrating post-injections in a fuel injection system, including a fuel accumulator, of an internal combustion engine, in particular of a motor vehicle, in which it is provided in particular that the calibration of at least one post-injection takes place based on the pressure drop in the fuel accumulator caused by the fuel injection. 115-. (canceled)16. A method for calibrating post-injections in a fuel injection system , including a fuel accumulator , of an internal combustion engine of a motor vehicle , the method comprising:calibrating at least one post-injection based on a pressure drop in the fuel accumulator caused by the fuel injection.17. The method as recited in claim 16 , wherein the calibration is carried out individually for each cylinder of the internal combustion engine.18. The method as recited in claim 16 , wherein the pressure drop is evaluated based on differential pressure values that are ascertained within two temporal evaluation windows.19. The method as recited in claim 18 , wherein arithmetic averaging takes place within the evaluation windows.20. The method as recited in claim 16 , wherein the pressure drop is carried out based on a calibration claim 16 , which has already taken place claim 16 , of at least one pre-injection.21. The method as recited in claim 16 , wherein the pressure drop which occurs for the at least one calibrated pre-injection is compared to the pressure drop which results for a post-injection that is calibrated corresponding to the pre-injection claim 16 , the at least one calibrated pre-injection being used as a reference.22. The method as recited in claim 21 , wherein the post-injection which is corrected based on the calibration of the at least one pre-injection is used as a control variable of a controller claim 21 , and the difference in the pressure drops which results from the comparison is corrected by adjusting the control duration of the post-injection as a manipulated variable of the controller. ...

Method and Motor Controller for Multiple Injections with Quantity Correction for an Internal Combustion Engine

A method for injecting a predetermined total fuel quantity via multiple injections using a fuel injector having a solenoid drive for an internal combustion engine of a motor vehicle is disclosed. The method includes determining a first target injection quantity to be injected per injection to inject the total fuel quantity throughout a series of consecutive injections; and performing a first subseries of consecutive injections, where the fuel injector is actuated according to the first target injection quantity. The method also includes determining a first fuel quantity injected during the first subseries of injections; determining a second target injection quantity to be injected per injection in a second subseries of consecutive injections, to inject the total fuel quantity throughout the first subseries and the second subseries of consecutive injections; and performing the second subseries of injections. The fuel injector is actuated according to the second target injection quantity. 1. A method for injecting a predetermined total fuel quantity via multiple injections using a fuel injector having a solenoid drive for an internal combustion engine of a motor vehicle , the method comprising:determining a first target injection quantity to be injected per injection to inject the total fuel quantity throughout a series of consecutive injections;carrying out a first subseries of consecutive injections, wherein the fuel injector is actuated according to the first target injection quantity;determining a first fuel quantity injected during the first subseries of injections;determining a second target injection quantity to be injected per injection in a second subseries of consecutive injections, to inject the total fuel quantity throughout the first subseries and the second subseries of consecutive injections; andcarrying out the second subseries of injections, wherein the fuel injector is actuated according to the second target injection quantity.2. The method of claim ...

CONTROLLER OF INTERNAL COMBUSTION ENGINE AND LEARNING METHOD OF LEARNING VALUE IN INTERNAL COMBUSTION ENGINE

A controller includes a P/L learning unit that performs P/L learning, a purge learning unit that performs purge learning, an air-fuel ratio learning unit that performs air-fuel ratio learning, and a storage unit that stores learning result. When the learning result of each learning process is not stored in the storage unit at the time of engine start, the P/L learning unit learns an injection characteristic of an in-cylinder injection valve through the P/L learning process whenever the in-cylinder injection valve performs the P/L injection and interrupts the P/L learning process before the P/L learning process is completed. The purge learning unit performs the purge learning process, and the air-fuel ratio learning unit starts the air-fuel ratio learning process provided that the P/L learning process is interrupted. The P/L learning unit then resumes the P/L learning process provided that the purge learning process is completed. 1. An internal combustion engine controller applied to an internal combustion engine including an in-cylinder injection valve that injects fuel into a cylinder , the controller comprisingan injection control unit that controls driving of the in-cylinder injection valve based on a requested injection amount of the in-cylinder injection valve;a partial lift learning unit that, when partial lift injection terminating fuel injection before a valve body reaches a fully open position is performed in the in-cylinder injection valve, performs a partial lift learning process of learning an injection characteristic of the in-cylinder injection valve so that a divergence of a correlation value of the requested injection amount and a correlation value of an actual injection amount is decreased based on the present correlation value of the requested injection amount of the in-cylinder injection valve and the correlation value of the actual injection amount of the in-cylinder injection valve when the partial lift injection is performed, wherein the ...

INTERNAL COMBUSTION ENGINE CONTROL DEVICE AND INTERNAL COMBUSTION ENGINE CONTROL METHOD

An internal combustion engine control device controls an in-cylinder direct injection type spark ignition internal combustion engine including a fuel injection valve for injecting fuel into a cylinder and an ignition plug for igniting an air-fuel mixture in the cylinder and configured to inject the fuel in an expansion stroke and ignite the fuel after injection in the expansion stroke under a specific operating condition. The internal combustion engine control device shortens an interval between a fuel injection timing in the expansion stroke and an ignition timing as the ignition timing is retarded. 1. An internal combustion engine control device for controlling an in-cylinder direct injection type spark ignition internal combustion engine including a fuel injection valve for injecting fuel into a cylinder and an ignition plug for igniting an air-fuel mixture in the cylinder and configured to inject the fuel in an expansion stroke and ignite the injected fuel in the expansion stroke under a specific operating condition , wherein:an interval between a fuel injection timing and an ignition timing in the expansion stroke is shortened as the ignition timing is retarded.2. The internal combustion engine control device according to claim 1 , wherein:a fuel injection amount in the expansion stroke is increased as the ignition timing is retarded.3. The internal combustion engine control device according to claim 1 , wherein:the fuel is injected also in an intake stroke besides the expansion stroke under the specific operating condition; anda fuel injection amount in the intake stroke is increases so that an air-fuel ratio of a homogeneous air-fuel mixture formed in the entire cylinder by the fuel injected in the intake stroke is richer than a stoichiometric air-fuel ratio when the ignition timing is later than a predetermined timing.4. An internal combustion engine control method for controlling an in-cylinder direct injection type spark ignition internal combustion engine ...

METHOD FOR ENGINE DRIVABILITY ROBUSTNESS BY VARIABLE INDEXING AND VEHICLE THEREOF

A method for engine drivability robustness includes: dividing, by an engine controller, an engine state into a starting condition, a stop condition, and a deceleration condition; dividing an injection mode index of a fuel injection into a suction compression injection of the starting condition, a suction split injection of the stop condition, and a suction compression split injection of the deceleration condition, respectively, depending on a low volatile fuel condition; and performing a variable indexing mode to prevent an engine off by applying a lambda control factor for a rich lambda control by an increase in fuel amount to the deceleration condition. 1. A method for engine drivability robustness , the method comprising:dividing, by an engine controller, an engine state into a starting condition, a stop condition, and a deceleration condition;dividing an injection mode index of a fuel injection into a suction compression injection of the starting condition, a suction split injection of the stop condition, and a suction compression split injection of the deceleration condition, respectively, depending on a low volatile fuel condition; andperforming a variable indexing mode to prevent an engine off by applying a lambda control factor for a rich lambda control by an increase in fuel amount to the deceleration condition.2. The method of claim 1 , wherein the variable indexing mode uses an oxygen sensor detection value claim 1 , an open value of a throttle valve claim 1 , and a vehicle speed as index variables while using an elapsed starting time claim 1 , an engine coolant temperature claim 1 , and an engine torque as basic variables together with the engine state to detect determination variables of the low volatile fuel condition claim 1 , determines the low volatile fuel condition by the basic variables and the index variables claim 1 , performs an index classification mode in which the injection mode index is calculated and the lambda control factor is ...

FUEL INJECTION CONTROLLER FOR INTERNAL COMBUSTION ENGINE

A fuel injection controller for an internal combustion engine is provided. The fuel injection controller includes an electronic control unit configured to (a) execute main fuel injection and auxiliary fuel injection in one engine cycle; and (b) execute the auxiliary fuel injection at least once in a particular period that includes timing at which a intake valve starts opening, so that fuel injected in the auxiliary fuel injection is carried by a reverse tumble stream, the reverse tumble stream being an air stream that flows from a intake port into a combustion chamber, flows along a bore wall surface on the intake valve side that is on an opposite side from a exhaust valve toward a piston crown surface, and then flows from the piston crown surface toward a cylinder head lower surface. 1. A fuel injection controller for an internal combustion engine , the internal combustion engine including a combustion chamber , an intake valve , an exhaust valve , and a fuel injection valve , the combustion chamber being defined by a piston crown surface , a cylinder head lower surface that faces the piston crown surface , and a cylinder bore , the intake valve configured to open or close a intake communicating section between the combustion chamber and an intake port , the intake communicating section arranged below the cylinder head lower surface , the exhaust valve configured to open or close a exhaust communicating section between the combustion chamber and an exhaust port , the exhaust communicating section arranged below the cylinder head lower surface , the fuel injection valve configured to inject fuel from a specified position in a region near a wall surface of the cylinder bore on the intake valve side to a region between the exhaust valve and the piston crown surface in the combustion chamber , the intake port configured to generate a normal tumble stream and a reverse tumble stream in an opening period of the intake valve , the normal tumble stream being an air stream ...

FUEL INJECTION CONTROL DEVICE

A fuel injection control device includes a reference interval calculation section that calculates a reference interval between an end time of a decrease interval where the pressure decreases as a fuel injection rate increases and a start time of an increase interval where the pressure increases as the fuel injection rate decreases on a pressure waveform detected by the pressure sensor, an integration interval setting section that sets, in the reference interval, an integration interval where an influence of a disturbance on the fuel pressure decrease due to a target injection is suppressible, and a decrease amount calculation section that calculates a corresponding pressure decrease amount, which is a fuel pressure decrease amount corresponding to a maximum injection rate of fuel of the target injection, based on an integral value obtained by integrating the fuel pressure decrease amount due to the target injection in the integration interval. 1. A fuel injection control device applied to a fuel injection system including a pressure sensor that detects a pressure of fuel supplied to a fuel injection valve , the device comprising:a reference interval calculation section configured to calculate a reference interval between an end time of a decrease interval where the pressure decreases as a fuel injection rate increases and a start time of an increase interval where the pressure increases as the fuel injection rate decreases on a pressure waveform detected by the pressure sensor;an integration interval setting section configured to set, in the reference interval, an integration interval where an influence of a disturbance on the fuel pressure decrease due to a target injection is suppressible; anda decrease amount calculation section configured to calculate a corresponding pressure decrease amount, which is an amount of the fuel pressure decrease corresponding to a maximum injection rate of fuel of the target injection, based on an integral value obtained by ...

ENGINE CONTROL DEVICE

A control device for an engine is provided. A cavity formed in a crown surface of a piston of the engine includes a first cavity part disposed in a radially center area, a second cavity part disposed radially outward of the first cavity part, and a connecting part connecting these two parts. The control device causes a fuel injection valve to perform a first injection in which fuel is injected at a timing when the piston is located at an advancing side of CTDC and an injection axis thereof intersects with the connecting part, a second injection in which fuel is injected toward the first cavity part at a retarding side of the first injection, and a middle injection in which fuel is injected at a timing between the first and second injections, for a period shorter than each of the first and second injections. 1. A control device for an engine including a combustion chamber formed by a cylinder , a crown surface of a piston , and a ceiling surface , and a fuel injection valve disposed in a radially center part of the ceiling surface and configured to inject fuel into the combustion chamber , a cavity being formed in the crown surface of the piston , the cavity including a first cavity part disposed in a radially center area of the crown surface and provided with a first bottom part having a first depth in a cylinder axis direction; a second cavity part disposed in the crown surface at a location radially outward of the first cavity part and provided with a second bottom part having a second depth shallower than the first depth in the cylinder axis direction; and a connecting part connecting the first cavity part with the second cavity part , the control device comprising:a processor configured to execute a fuel injection controlling module to control operation of the fuel injection valve, a first injection in which fuel is injected at a timing when the piston is located at an advancing side of a compression top dead center, and an injection axis of the fuel injection ...

FUEL INJECTION CONTROL METHOD AND FUEL INJECTION CONTROL DEVICE FOR COMPRESSION SELF-IGNITION ENGINE

The compression self-ignition engine fuel injection control device is configured to, during one combustion stroke, perform multiple fuel injections to induce multiple combustions in a cylinder. The fuel injection control device comprises a PCM () configured to set an interval between temporally-adjacent two of the multiple fuel injections, so as to allow valley regions of a curve indicative of a frequency characteristic of a combustion pressure wave generated by the multiple combustions to fall within respective ranges of a plurality of resonant frequency bands of a structure of an engine body of the engine, wherein the PCM is operable to increase the interval between the temporally-adjacent multiple fuel injections to 1.7±0.1 msec. 1. A fuel injection control method for a compression self-ignition engine configured to , during one combustion stroke , perform multiple fuel injections to induce multiple combustions in a cylinder , comprisinga step of setting an interval between temporally-adjacent two of the multiple fuel injections, so as to allow valley regions of a curve indicative of a frequency characteristic of a combustion pressure wave generated by the multiple combustions to fall within respective ranges of a plurality of resonant frequency bands of a structure of an engine body of the engine,wherein the step of setting an interval between temporally-adjacent two of the multiple fuel injections includes a sub-step of setting the interval between the temporally-adjacent fuel injections to 1.7±0.1 msec.2. The fuel injection control method as recited in claim 1 , wherein the multiple fuel injections comprise a pre-injection claim 1 , a main injection claim 1 , and an after-injection claim 1 , and wherein the fuel injection control method further comprises a step of: setting an injection timing of the main injection to a timing corresponding to a given crank angle; setting an injection timing of at least one of the pre-injection and the after-injection claim 1 , ...

Device for Controlling Fuel Injection Device

Provided is a device for controlling a fuel injection device capable of suppressing deterioration of exhaust performance while ensuring driving performance when acceleration of a vehicle is requested during an intake stroke. Therefore, when the acceleration of a vehicle is requested during an intake stroke in one combustion cycle, an engine control unit estimates an increase (acceleration intake air amount Qad) of the amount of air taken in a combustion chamber of an internal combustion engine associated with the acceleration of the vehicle after the acceleration of the vehicle is requested in one combustion cycle based on a lift amount of an intake valve . The engine control unit controls a fuel injection valve so as to increase a fuel injection amount in one combustion cycle according to the acceleration intake air amount Qad. 1. A device for controlling a fuel injection device , comprising:an estimation unit configured to estimate, when acceleration of a vehicle is requested during an intake stroke in one combustion cycle, based on a lift amount of an intake valve, an increase in the amount of air taken in a combustion chamber of an internal combustion engine associated with the acceleration of the vehicle after the acceleration of the vehicle is requested in the one combustion cycle; anda control unit configured to control the fuel injection device so as to increase a fuel injection amount in the one combustion cycle according to the increase in the air amount estimated in the estimation unit.2. The device for controlling the fuel injection device according to claim 1 , comprising:a storage unit configured to store an air amount ratio indicating a ratio of the amount of air taken in the combustion chamber of the internal combustion engine from a timing at which the acceleration of the vehicle is requested to a valve closing completion timing of the intake valve with respect to the amount of air taken in the combustion chamber of the internal combustion engine ...

FUEL INJECTION VALVE AND ENGINE SYSTEM

A fuel injection valve includes: a movable arrangement that is coupled to a movable core and a needle while a movable flow passage, which forms a part of a flow passage of the fuel injection valve, is formed at an inside of the movable arrangement; and a valve main body that receives the movable arrangement. The movable arrangement has: a first flow-restricting portion that reduces a cross-sectional area of a portion of the movable flow passage; and a second flow-restricting portion that is spaced away from the first flow-restricting portion and reduces a cross-sectional area of another portion of the movable flow passage to a cross-sectional area that is equal to or larger than a cross-sectional area of the first flow-restricting portion. A distance between the first flow-restricting portion and the second flow-restricting portion is larger than an equivalent diameter of the cross-sectional area of the second flow-restricting portion. 1. A fuel injection valve including an injection hole for injecting fuel and a flow passage for conducting the fuel to the injection hole , the fuel injection valve comprising:a coil that is configured to generate a magnetic flux when the coil is energized;a stationary core that is configured to form a passage of the magnetic flux and generate a magnetic force;a movable arrangement that is coupled to a movable core configured to be moved by the magnetic force and a needle configured to be driven by the movable core to open and close the injection hole, wherein a movable flow passage, which forms a part of the flow passage, is formed at an inside of the movable arrangement; anda valve main body that receives the movable arrangement in a movable state where the movable arrangement is movable along an axis of the fuel injection valve while the valve main body forms another part of the flow passage at an inside of the valve main body, wherein: a first flow-restricting portion that reduces a cross-sectional area of a portion of the movable ...

INTERNAL COMBUSTION ENGINE

A controller is provided that performs first injection that executes fuel injection with lower injection rate and subsequently performs second injection with higher injection rate. The controller configured to determine a target value for fuel pressure drop amount or difference between pressure of fuel within a fuel injection valve at starting point of the first injection and pressure of fuel within the fuel injection valve while the first injection is performed, and stop supply of command signal to the fuel injection valve once fuel pressure drop amount in the first injection becomes greater than target value for the fuel pressure drop amount, and supply command signal once the fuel pressure drop amount in the first injection becomes smaller than the target value for the fuel pressure drop amount. 1. An internal combustion engine comprising:a fuel injection valve in which, in response to supply of command signal, a needle is urged in a valve-opening direction and thereby cross-sectional area of a fuel passage is expanded and injection rate of fuel is increased according to amount of lift of the needle, the fuel injection valve having a sensor for detecting pressure of fuel within the fuel injection valve;a controller comprising at least one processor configured to supply the command signal to the fuel injection valve, the controller comprising at least one processor configured to perform first injection that executes fuel injection from the fuel injection valve and subsequently comprising at least one processor configured to perform second injection that executes fuel injection from the fuel injection valve with injection rate higher than that in the first injection;an operational state detector configured to detect operational state of the internal combustion engine,wherein the controller comprising at least one processor configured to determine, based on the operational state of the internal combustion engine detected by the operational state detector, a target ...

METHOD OF INJECTION MANAGEMENT IN AN INTERNAL COMBUSTION ENGINE

This method of injection management in a direct-injection engine involves shifting from a so-called single-injection mode (Init 1 pulse), in which the major portion of the quantity of fuel injected during a combustion cycle is injected in one go, to a so-called multi-injection mode (MPL active), in which several successive injections are carried out in order to inject fuel during a combustion cycle, and vice versa. The multi-injection mode is chosen when a condition based on one or more parameter(s) of the engine is fulfilled (MPL cdn ok). The multi-injection mode is limited to a predefined time interval (Tact_MPL_max) even if, at the end of the interval, the condition for adopting the multi-injection mode is still fulfilled. 1. A method for managing injection in a direct injection engine , in which method provision is made to pass from what is referred to as a single-shot injection regime in which the quantity of fuel injected during a combustion cycle is injected in a single shot to what is referred to as a multi-shot injection regime in which several successive shots are injected in order to inject the fuel during a combustion cycle , and vice versa , and in which the multi-shot injection regime is chosen when a condition based on one or more engine parameter(s) is met ,wherein the management method plans for the multi-shot injection regime to be limited to a predetermined time interval even if, at the end of this interval, the condition for adopting the multi-shot injection regime is still met.2. The engine injection management method as claimed in claim 1 , wherein the length of the time interval is defined as a function of engine parameters.3. The engine injection management method as claimed in claim 2 , wherein the length of the multi-shot injection regime is defined as a function of parameters connected with temperatures inside the engine.4. The engine injection management method as claimed in claim 3 , wherein the length of the multi-shot injection regime ...

Control apparatus and control method for internal combustion engine

A control apparatus for an internal combustion engine, wherein the internal combustion engine includes a fuel injection valve injecting fuel directly into a cylinder. The control apparatus includes an ECU. The ECU is configured to execute a divided injection control to inject fuel from the fuel injection valve by a plurality of partial lift injections. The ECU is configured to execute a division number reduction control when the value of a spray shape parameter representing spray shape fluctuation is greater than a division number reduction determination value. The division number reduction control is control to reduce the number of partial lift injections in one engine cycle and to lengthen an injection time of each of the partial lift injections.

CONTROL METHOD AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

As a control method for internal combustion engine, a part of a low-medium revolution speed/low-medium load region of an internal combustion engine is set as a lean combustion region, homogeneous combustion is performed in an operating region within the lean combustion region where a load is relatively low, by injecting fuel at least once between an intake stroke and the first half of a compression stroke to form a homogeneous air-fuel mixture in a combustion chamber, and stratified combustion is performed in an operating region within the lean combustion region where the load is relatively high, by injecting the fuel at least once, respectively, between the intake stroke and the first half of the compression stroke as well as in the second half of the compression stroke to form a stratified air-fuel mixture in the combustion chamber. In this control method, ignition energy supplied to an ignition plug when the stratified combustion is performed is controlled to be smaller than ignition energy supplied to the ignition plug when the homogeneous combustion is performed. 1. A control method for internal combustion engine , comprising:setting a part of a low-medium revolution speed/low-medium load region of an internal combustion engine as a lean combustion region;setting a high revolution speed region and high load region outside the lean combustion region of an internal combustion engine as a homogeneous stoichiometric combustion region;performing homogeneous lean combustion in an operating region within the lean combustion region where a load is relatively low, by injecting fuel at least once between an intake stroke and the first half of a compression stroke to form a homogeneous air-fuel mixture in a combustion chamber; andperforming stratified lean combustion in an operating region within the lean combustion region where the load is relatively high, by injecting the fuel at least once, respectively, between the intake stroke and the first half of the compression ...

CONTROL DEVICE FOR COMPRESSION IGNITION ENGINE

A control device for a compression ignition engine is provided, which causes an injector to perform a pre-injection and a main injection, sets fuel injection timings of these injections so that an interval between a first peak of a heat release rate resulting from the combustion of fuel injected by the pre-injection and a second peak of the heat release rate resulting from the combustion of fuel injected by the main injection becomes an interval to make pressure waves caused by these combustions cancel each other out, and when an increase of an oxygen concentration of intake air supplied to a combustion chamber is detected, controls the injector to reduce the injection amount and retard the injection timing of the pre-injection compared with a case where the concentration increase is not detected under a condition that engine load and speed are the same. 1. A control device for a compression ignition engine causing fuel injected into a combustion chamber from an injector to combust by compression ignition , comprising:{'sub': '2', 'an intake Osensor configured to acquire an oxygen concentration of intake air supplied to the combustion chamber; and'}a processor configured to execute a fuel injection controlling module to control an injection amount and an injection timing of the fuel by the injector,wherein the fuel injection controlling module causes the injector to perform a pre-injection in which fuel is injected at an advancing side of a compression top dead center, and a main injection in which fuel is injected during combustion of the fuel injected by the pre-injection,wherein the fuel injection controlling module sets the fuel injection timings of the pre-injection and the main injection so that an interval between a first peak of a heat release rate resulting from the combustion of the fuel injected by the pre-injection and a second peak of the heat release rate resulting from the combustion of the fuel injected by the main injection becomes an interval to ...

SYSTEM AND METHOD FOR OPERATING A FUEL INJECTOR

Methods and systems for operating a direct fuel injector of an internal combustion engine are described. In one example, a nozzle needle is moved in two directions to maintain fuel flow through the direct fuel injector and to reduce the possibility of the nozzle needle impacting a piezoelectric actuator. The method and system may permit long fuel injection times without causing undesirable impacts between components of a fuel injector. 1. A fuel injector operating method , comprising:commanding a fuel injector open a plurality of times before contacting a nozzle needle with a nozzle needle seat during a cycle of a cylinder.2. The fuel injector method of claim 1 , further comprising commanding the fuel injector closed a plurality of times before contacting the nozzle needle with the nozzle needle seat.3. The fuel injector method of claim 2 , where the nozzle needle is commanded closed each of the plurality of times before the nozzle needle impacts a piezoelectric device or device that is between the nozzle needle and the piezoelectric actuator.4. The fuel injector method of claim 2 , where the fuel injector is commanded closed via flowing a first current in a first direction between a controller and a piezoelectric actuator of the fuel injector.5. The fuel injector method of claim 4 , where the fuel injector is commanded open via supplying flowing a second current in a second direction between the controller and the piezoelectric actuator of the fuel injector.6. The fuel injector method of claim 1 , where the nozzle needle is in an open state and not contacting the nozzle needle seat.7. The fuel injector method of claim 1 , where contacting the nozzle needle with the nozzle needle seat substantially stops fuel flow through the fuel injector claim 1 , and further comprising:adjusting timing of commanding the fuel injector in response to output of a position sensor.8. The fuel injector method of claim 1 , where commanding the fuel injector open the plurality of times ...

COLD START SPLIT INJECTION CONTROL METHOD AND ENGINE SYSTEM

A cold start split injection control method is provided. The method includes a split injection controller which determines cold start conditions of an engine system, an injection mode control which performs a cold start split injection by an operation of an injector and an injection malfunction diagnostic control which performs an injection malfunction diagnostic with any one or more among an injector opening angle, an injector operating time, and the number of injector operation times which are measured through the fuel injection of the injector. 1. A cold start split injection control method , comprising:performing, by a split injection controller, an injection mode control which performs a cold start split injection by an operation of an injector, wherein the split injection controller determines cold start conditions of an engine system; andperforming, by the split injection controller, an injection malfunction diagnostic control which performs an injection malfunction diagnostic with any one or more among an injector opening angle, an injector operating time, and the number of injector operation times measured using the fuel injection of the injector.2. The method of claim 1 , wherein the cold start conditions apply a coolant temperature and an engine revolution per minute (RPM) claim 1 , and wherein the cold start condition determination is performed based on the coolant temperature initially followed by the engine RPM.3. The method of claim 2 , wherein the coolant temperature is applied as a determination condition by setting a setting coolant temperature to about 56° C.4. The method of claim 2 , wherein the engine RPM is applied as a determination condition by setting a setting engine RPM region to about 700 to 960 revolutions per minute (RPM).5. The method of claim 1 , wherein the injection mode control includes generating claim 1 , as injection operation detection values claim 1 , any one or more among an injector opening angle claim 1 , an injector ...

CATALYST DETERIORATION DETERMINATION SYSTEM

A catalyst deterioration determination system effectively prevents erroneous determination caused by increase of the H2 component in exhaust gas and improves accuracy of determination. A LAF sensor and an O2 sensor are provided on the upstream side and downstream side of a three-way catalyst. Deterioration of the three-way catalyst is determined on the basis of an output of the O2 sensor, which is detected during air-fuel ratio switching control in which an air-fuel ratio is alternately switched to the rich side and lean side of the stoichiometric air-fuel ratio according to a detected equivalent ratio detected by the LAF sensor, on the basis of a result of comparison between an oxygen inflow into the three-way catalyst and a lean side-limiting value and a rich side-limiting value which are target values of the oxygen inflow. Fuel injection timing retardation control and/or divided fuel injection control are prohibited during the deterioration determination. 1. A catalyst deterioration determination system configured to determine deterioration of a catalyst , the catalyst being provided in an exhaust system of an internal combustion engine , having an oxygen storing capacity , and purifying exhaust gas , the system comprising:a first oxygen concentration sensor that is provided on the upstream side of said catalyst;a second oxygen concentration sensor that is provided on the downstream side of said catalyst;an oxygen inflow calculation controller configured to calculate an amount of oxygen flowing into said catalyst as an oxygen inflow;air-fuel ratio switching controller configured to perform air-fuel ratio switching control in which control is performed to alternately switch an air-fuel ratio of an air-fuel mixture supplied to said internal combustion engine between a rich side and a lean side of a stoichiometric air-fuel ratio, according to an oxygen concentration detected by said first oxygen concentration sensor, on the basis of a result of comparison between ...

METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE

An apparatus and method for controlling a fuel injection system of an internal combustion engine is disclosed. Each fuel injector in the system is operated to perform a predetermined injection pattern per engine cycle. A signal representative of a fuel pressure within the fuel rail during the operation of the fuel injectors is sampled. A Fourier analysis of the fuel rail pressure signal is performed to determine one or more harmonic components thereof. The determined harmonic components of the fuel rail pressure signal are used to calculate a dynamic fuel quantity that flows through a fuel injector during an injection pulse of the injection pattern. A fuel quantity actually injected by the fuel injector during the injection pulse as a function of the dynamic fuel quantity is calculated. 114-. (canceled)15. A method of operating an internal combustion engine having a fuel rail in fluid communication with the fuel pump and a plurality of fuel injectors in fluid communication with the fuel rail , wherein the method comprises:operating each fuel injector to perform a predetermined injection pattern per engine cycle;sampling a fuel rail pressure signal representative of a fuel pressure within the fuel rail during the operation of the fuel injectors;performing a Fourier analysis of the fuel rail pressure signal to determine at least one harmonic components thereof;calculating a dynamic fuel quantity that flows through a fuel injector during an injection pulse of the injection pattern using the at least one harmonic components of the fuel rail pressure signal; anddetermining a fuel quantity actually injected by the fuel injector during the injection pulse as a function of the dynamic fuel quantity.16. The method according to further comprising adjusting an energizing time actually needed for each of the plurality of fuel injectors to inject a desired quantity of fuel with each of the plurality of fuel injectors claim 15 , wherein the calculate fuel quantity actually ...

Control For Overrun Cutoff Of Internal Combustion Engine

A method for controlling an internal combustion engine operated with direct fuel injection may include, during a transition phase after the end of an overrun cut-off with resumption of fuel injection and normal operation of the internal combustion engine, shifting an injection start time (SOI) by an adaptation value (ΔSOI) in relation to an injection start time (SOI) which lies later than an injection start time (SOI_Norm) determined during normal operation of the internal combustion engine. 1. A method for controlling an internal combustion engine operated with direct fuel injection , the method comprising:during a transition phase after the end of an overrun cut-off with resumption of fuel injection and normal operation of the internal combustion engine, shifting an injection start time (SOI) by an adaptation value (ΔSOI) in relation to an injection start time (SOI) which lies later than an injection start time (SOI_Norm) determined during normal operation of the internal combustion engine.2. The method as claimed in claim 1 , characterized in that the adaptation value (ΔSOI) is set in a manner dependent on a time duration of the overrun cut-off.3. The method as claimed in claim 1 , wherein:at the start of the overrun cut-off, a time counter is started, and during a time duration of the overrun cut-off, a counter status (ZS) of the time counter is incremented in predefined steps by a first value (ΔZS1),upon ending of the overrun cut-off, the counter status (ZS) of the time counter is decremented in predefined steps by a second value (ΔZS2), andwhen a counter status (ZS) of equal to zero is reached, the shift of the injection start time (SOI) is ended, and the injection start time (SOI_Norm) determined during normal operation of the internal combustion engine is used.4. The method as claimed in claim 3 , wherein the adaptation value (ΔSOI) is selected in a manner dependent on the counter status (ZS) of the time counter.5. The method as claimed in claim 4 , wherein ...

Control device of internal combustion engine

In control device of an internal combustion engine, for each first period, a calculation unit calculates number of fuel injections within one combustion cycle and fuel injection rate. For first period, a first storage unit stores number of fuel injections and fuel injection rate of calculation unit. For each second period, a reference unit refers to the number of fuel injections and fuel injection rate stored by the first storage unit. A second storage unit stores for an interval, from the start time of the first fuel injection until start of the last fuel injection of at least one combustion cycle, the number of fuel injections and fuel injection rate referred to by reference unit. A control unit controls a fuel injection valve so that fuel is injected in accordance with the number of fuel injections fuel injection rate stored by second storage unit.

CONTROL DEVICE FOR DIRECT INJECTION GASOLINE ENGINE

An engine has an engine body, an injector, and a control section which controls a fuel injection amount and an injection state of the injector. The control section predicts a state of temperature in the combustion chamber, and controls the injector such that a volume of an air-fuel mixture layer formed in the combustion chamber is larger when the predicted temperature is high, than when the predicted temperature is low, even when same fuel amounts are injected. 1. A device for controlling a direct injection gasoline engine , comprising:an engine body which has a piston in a cylinder and of which a combustion chamber is defined by the cylinder and the piston;an injector configured to inject a fuel containing at least gasoline into the combustion chamber through a nozzle hole; anda control section configured to control a fuel injection amount to be injected into the combustion chamber, and an injection state of the injector, according to an operational state of the engine body, whereinthe control section predicts a state of temperature in the combustion chamber, and controls the injection state of the injector such that a volume of an air-fuel mixture layer formed in the combustion chamber is larger when the predicted temperature is high, than when the predicted temperature is low, even when same fuel amounts are injected.2. The device of claim 1 , whereinthe control section controls the injection state of the injector to increase the volume of the air-fuel mixture layer by increasing a width, which extends in a radial direction and intersects with a central axis of the cylinder, of the air-fuel mixture layer formed in the combustion chamber, while keeping a same length of the air-fuel mixture layer along the central axis of the cylinder.3. The device of claim 1 , whereinthe injector has a nozzle body provided with the nozzle hole, and a valve element which opens and closes the nozzle hole, and the injector is configured such that an effective cross-sectional area of ...

Internal Combustion Engine Control Device, and Fuel Injection Valve

Emission of unburned hydrocarbons and soot is reduced while ensuring startability (ignitability) in a cold start mode of an internal combustion engine. Thus, fuel is injected with a first injection rate as an injection rate of a fuel injection valve in a warm state in which a temperature of an engine is equal to or higher than a set temperature, and the fuel is injected with a second injection rate lower than the first injection rate as the injection rate of the fuel injection valve in a cold state in which the temperature of the engine is lower than the set temperature at the same fuel pressure as that in the warm state. 1. A control device comprisinga CPU that controls a fuel injection valve which injects fuel into a cylinder of an internal combustion engine,wherein the CPU includes a fuel injection control unit that injects the fuel with a first injection rate as an injection rate of the fuel injection valve in a warm state in which a temperature of the internal combustion engine is equal to or higher than a set temperature, and injects the fuel with a second injection rate lower than the first injection rate as the injection rate of the fuel injection valve in a cold state in which the temperature of the internal combustion engine is lower than the set temperature at the same fuel pressure as a fuel pressure in the warm state.2. The control device according to claim 1 , wherein the fuel injection control unit of the CPU injects the fuel with the second injection rate as the injection rate of the fuel injection valve at least in a latter half of a compression stroke in the cold state at the same fuel pressure as the fuel pressure in the warm state.3. The control device according to claim 1 , wherein the fuel injection control unit of the CPU injects the fuel with the second injection rate as the injection rate of the fuel injection valve in a range in which at least a crank angle is from 90° to 0° before a compression top dead center in the cold state at the same ...

FUEL INJECTION CONTROLLER AND FUEL INJECTION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

A fuel injection controller for an internal combustion engine selects as the injection mode either single injection or split injection, counts, based on a drive current detection signal, which indicates that a drive current is generated to be fed to the direct injector, the number of occurrences of the drive current in one combustion cycle as a number-of-injections count value, and determines, based on the number-of-injections count value, whether the combustion state in the cylinder is satisfactory. The fuel injection controller determines that the combustion state in the cylinder is unsatisfactory if the number-of-injections count value in one combustion cycle is one when catalyst warm-up control is being performed with the temperature of the engine being lower than or equal to a predetermined temperature. 1. A fuel injection controller for an internal combustion engine , wherein the internal combustion engine includes an electromagnetic direct injector , which is configured to inject fuel into a cylinder , and an exhaust purification catalyst , which is located in an exhaust passage to purify exhaust , the fuel injection controller comprising:a number-of-injections determination section configured to select, as an injection mode, either single injection, in which an amount of fuel required for each combustion is injected in one injection, or split injection, in which the amount of fuel required for each combustion is divided and injected in a plurality of fuel injections, in accordance with an operation state of the internal combustion engine;a count section configured to count, based on a drive current detection signal, which indicates that a drive current is generated to be fed to the direct injector, a number of occurrences of the drive current in one combustion cycle as a number-of-injections count value; anda determination section configured to determine, based on the number-of-injections count value, whether a combustion state in the cylinder is ...

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

An internal combustion engine control apparatus including a microprocessor. The microprocessor is configured to perform determining whether a warm-up of an exhaust catalyst device disposed on an exhaust passage of an internal combustion engine is complete; acquiring an information on a temperature inside a cylinder of the internal combustion engine; switching an injection mode to a first injection mode or a second injection mode in accordance with an information on a temperature inside the cylinder when it is determined that a warm-up of the exhaust catalyst device is complete; and controlling a fuel injector so as to inject the fuel in accordance with an injection mode.

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

An internal combustion engine control apparatus including a microprocessor. The microprocessor is configured to perform controlling a fuel injector so as to inject a fuel of a target injection amount by dividing into a plurality of times at a predetermined time interval in an area from a first crank angle at which an intake stroke is started to a second crank angle at which a compression stroke is ended, and setting the predetermined time interval. The microprocessor is configured to perform the setting including setting the predetermined time interval so that a spray length from a tip of the fuel injector to a tip of a spray of the fuel injected from the fuel injector becomes shorter than the spray length when the fuel of the target injection amount is injected at once in the area by a predetermined rate. 1. A control apparatus for an internal combustion engine , the internal combustion engine including a piston reciprocating in a cylinder and a fuel injector arranged to inject a fuel toward a crown surface of the piston into a combustion chamber facing the piston in the cylinder ,the apparatus comprisingan electronic control unit having a microprocessor and a memory, wherein controlling the fuel injector so as to inject the fuel of a target injection amount by dividing into a plurality of times at a predetermined time interval in an area from a first crank angle at which an intake stroke is started to a second crank angle at which a compression stroke is ended; and', 'setting the predetermined time interval, and wherein, 'the microprocessor is configured to performthe microprocessor is configured to performthe setting including setting the predetermined time interval so that a spray length from a tip of the fuel injector to a tip of a spray of the fuel injected from the fuel injector becomes shorter than the spray length when the fuel of the target injection amount is injected at once in the area by a predetermined rate.2. The apparatus according to claim 1 , ...

FUEL INJECTION CONTROL DEVICE AND FUEL INJECTION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a port injector that injects fuel into an intake port and a direct injection injector that injects fuel directly into a combustion chamber. When the internal combustion engine is in a low load condition while requiring fuel injection, a controller stops fuel injection through the port injector so that an entire required fuel injection amount is injected through the direct injection injector. As a result of this processing, the fuel pressure of the direct injection injector is reduced quickly in the low load condition.

PREDICTIVE CORRECTION IN INTERNAL COMBUSTION ENGINES

A method and system for reducing cycle to cycle variation of an engine is provided. The system may determine fuel injection characteristics and predict a gas burning rate or flame speed based on the fuel injection characteristics. The system may adjust an ignition timing in response to the predicted gas burning rate within the same engine cycle. 1. A method for predicting knock in an engine , the method comprising:sensing combustion at multiple locations inside a cylinder including sensing a first combustion signal;sensing a second combustion signal;comparing a timing of the first combustion signal to a timing of the second combustion signal; andadjusting engine operating parameters in response to the comparison of the timing of the first combustion signal to the timing of the second combustion signal.2. The method according to claim 1 , wherein the first combustion signal comprises a first ion current signal.3. The method according to claim 2 , wherein the second combustion signal comprises a second ion current signal.4. The method according to claim 1 , wherein adjusting the engine controlling parameters include at least one of retarding a spark for a few crank angle degrees claim 1 , performing a double injection claim 1 , and adjusting a valve timing.5. A method for predicting pre-ignition of an engine claim 1 , the method comprising:determining fuel injection characteristics;predicting a first gas burning rate signal based on the fuel injection characteristics; andcomparing the first gas burning rate signal to at least one of an ignition timing or a characteristic of a second gas burning rate signal.6. The method according to claim 5 , wherein the fuel injection characteristics are determined by a hall-effect signal.7. The method according to claim 5 , wherein the fuel injection characteristics include at least one or a combination of an amplitude claim 5 , length claim 5 , slope claim 5 , timing claim 5 , peak claim 5 , and profile.8. The method according to ...

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR THE OPENLOOP AND CLOSED-LOOP CONTROL OF AN INTERNAL COMBUSTION ENGINE, INJECTION SYSTEM, AND INTERNAL COMBUSTION ENGINE

A method for operating an internal combustion engine having a motor with cylinder and an injection system having a common rail and injectors for the cylinders. Each injector has an accumulator for holding fuel from the common rail. A multiple injection of fuel is performed during each working cycle of a cylinder, including injecting a first amount in a first injection and injecting a second amount in a second injection, and determining fuel pressure for the common rail and/or the accumulator. A fuel injection amount parameter is determined for the first injection; an individual accumulator pressure and/or a common rail pressure is determined for the second injection; and a fuel injection amount parameter is determined for the second injection. The individual accumulator pressure and/or the common rail pressure are/is considered for determining the injection amount parameter of the fuel for the second injection. 117-. (canceled)18. A method for operating an internal combustion engine having a motor with a number of cylinders and an injection system having a common rail and a number of injectors assigned to the cylinders , wherein an injector is assigned an individual accumulator that holds fuel from the common rail available for the injector , wherein the method comprises the steps of:injecting fuel by an injector into a cylinder, wherein a multiple injection is performed during each working cycle of a cylinder, having the steps:injecting a first injection quantity of fuel in a first, preceding injection and injecting a second injection quantity of fuel in a second, subsequent injection, anddetermining a fuel pressure for the common rail and/or the individual accumulator,determining an injection quantity parameter for the first, preceding injection;determining an individual-accumulator pressure and/or a common rail pressure for the second, subsequent injection, anddetermining an injection quantity parameter for the second, subsequent injection, by selecting and ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

When it is determined that the igniting environment is out of the desired range, the variable valve mechanism is controlled so that the swirl ratio is increased. When the swirl ratio becomes high, the discharge spark and the initial flame move largely in the flow direction of the swirl flow SW and approach the closest fuel spray. Therefore, the discharge spark and the initial flame are attracted to the closest fuel spray and the initial flame enlarges by involving the closest fuel spray (middle stage of FIG. ). Further, the initial flame enlarges further by involving surrounded fuel spray (lower stage of FIG. ). 1. A control device for an internal combustion engine which is configured to control an engine ,wherein the engine comprising:an injector which is provided in an upper portion of a combustion chamber and is configured to inject fuel from multiple injection holes into a cylinder directly;a spark plug which is provided at the upper portion of the combustion chamber and is configured to ignite an air-fuel mixture inside the cylinder by using a discharge spark, the spark plug is also provided on a downstream side relative to the closest fuel spray to the spark plug among the fuel sprays injected from the multiple injection holes, the spark plug is also provided on an upper side of the combustion chamber relative to a contour surface of the closest fuel spray;a first intake valve and a second intake valve, each of which is configured to open and close the combustion chamber;a variable valve mechanism which is configured to increase or decrease lift amount of any one of the first intake valve and the second intake valve; andan exhaust cleaning catalyst which is configured to clean exhaust gas from the combustion chamber,wherein the control device is configured to control the spark plug and the injector as an activation control of the exhaust cleaning catalyst, the spark plug is controlled so as to generate a discharge spark over an ignition period on a retard side ...

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

A control apparatus for an internal combustion engine is configured, during a slightly stratified-charge lean-burn operation, to: calculate a basic total fuel injection amount based on a required torque; calculate a compression stroke injection amount based on an ignition delay index value; calculate, as a basic main injection amount, a value obtained by subtracting a compression stroke injection amount from the basic total fuel injection amount; calculate, based on an output value of an in-cylinder pressure sensor, an actual specified combustion index value that represents a main combustion speed or a combustion fluctuation rate; calculate a main injection correction term based on a result of a comparison between a target specified combustion index value or a tolerable specified combustion index value, and the actual specified combustion index value; and calculate a main injection amount by adding the main injection correction term to the basic main injection amount. 1. A control apparatus for an internal combustion engine that includes:an ignition device configured to ignite an air-fuel mixture in a cylinder;a fuel injection device that includes at least an in-cylinder injection valve configured to directly inject fuel into the cylinder; andan in-cylinder pressure sensor configured to detect in-cylinder pressure,wherein the control apparatus is configured to cause the fuel injection device to execute a main injection of fuel in or before an intake stroke and a compression stroke injection of the fuel in a compression stroke to perform a slightly stratified-charge lean-burn operation with a lean air-fuel ratio leaner than a stoichiometric air-fuel ratio, andwherein the control apparatus is configured, during the slightly stratified-charge lean-burn operation, to:(a) calculate, based on a required torque of the internal combustion engine, a basic total fuel injection amount that should be supplied in a cylinder during one combustion cycle;(b) calculate, based on an ...

MACHINE SYSTEM AND OPERATING STRATEGY USING AUTO-POPULATION OF TRIM FILES

Operating a machine system includes triggering, based on activation of an on-board electronic control system, interrogation of electronically controlled components installed in a machine to read a plurality of electronic trim files each resident on a different one of the electronically controlled components. A data structure on an electronic storage medium in the control system is populated with the electronic trim files each time the control system is activated, such as by turning on an ignition switch. Operating the machine system also includes outputting control signals based on the electronic trim files to run the machine system based on operation of the electronically controlled components responsive to the outputted control signals. 1. A method of operating a machine system comprising:activating an on-board electronic control system of a machine;triggering, based on the activating of the on-board electronic control system, interrogation of a plurality of electronically controlled components installed in the machine by a computer of the on-board electronic control system;machine reading, during the interrogation, a plurality of electronic trim files each resident on a different one of the plurality of electronically controlled components;populating a data structure on a machine readable storage medium in the on-board electronic control system with the plurality of electronic trim files;outputting control signals each based on the corresponding one of the plurality of electronic trim files to each of the plurality of electronically controlled components; andrunning the machine system after the populating of the data structure based on operation of the plurality of electronically controlled components responsive to the outputted control signals.2. The method of further comprising machine reading claim 1 , during the interrogation claim 1 , a plurality of component identifiers each resident on a different one of the plurality of electronically controlled ...

METHOD AND SYSTEM FOR CONTROLLING INJECTION OF MIXTURE FUEL IN AN INTERNAL COMBUSTION ENGINE

For controlling injection of a mixture fuel of ethanol and gasoline in an internal combustion engine, ethanol concentration of the mixture fuel supplied to the engine is detected, target operation information related to the engine is obtained, a division scheme of a plurality of injection regions is determined based on the ethanol concentration, an injection region corresponding to the target operation information is determined in the determined division scheme of injection regions corresponding to the ethanol concentration, and while performing injection of the mixture fuel corresponding to the determined injection region, at least one of injection timing and injection duration of the mixture fuel is varied according to the ethanol concentration. 1. A method for controlling injection of a mixture fuel of ethanol and gasoline in an engine , the method comprising:detecting ethanol concentration of the mixture fuel supplied to the engine;obtaining target operation information related to the engine;determining a division scheme of a plurality of injection regions based on the ethanol concentration and determining an injection region corresponding to the target operation information in the determined division scheme of injection regions corresponding to the ethanol concentration; andwhile performing injection of the mixture fuel corresponding to the determined injection region, varying at least one of injection timing and injection duration of the mixture fuel according to the ethanol concentration.2. The method of claim 1 , whereinwhen the ethanol concentration is less than or equal to a predetermined concentration, the plurality of injection regions includes a single injection region and a double injection region; andwhen the ethanol concentration is above the predetermined concentration, the plurality of injection regions includes a single injection region, a double injection region, and a triple injection region.3. The method of claim 2 , whereinthe target operation ...

METHODS AND SYSTEMS FOR ADJUSTING A DIRECT FUEL INJECTOR

Methods and systems are provided for reducing direct injector fueling errors due to injection variability in a transition region of a direct injector map. Fuel injection, including usage of one or more direct and port injected fuel pulses, may be planned based on engine operating conditions including engine temperature and driver demand. Responsive to any of the direct injected fuel pulses having a pulse-width that lies in a high variability transition region of the direct injector, the fuel injection may be adjusted via adjustments to a number and/or split ratio of the injections so as to not operate in the transition region. 1. A method for an engine , comprising:estimating an initial ratio of port injected fuel relative to direct injected fuel on a combustion cycle based on engine operating conditions; andresponsive to a direct fuel injection at the initial ratio being in a transition region of a direct injector map, updating the initial ratio to move the direct fuel injection out of the transition region.2. The method of claim 1 , wherein the transition region is positioned between a ballistic region and a lift region of the direct injector map claim 1 , and wherein direct injector variability in the transition region is higher than each of the ballistic region and the lift region.3. The method of claim 2 , wherein the updating is based on a pulse-width of the direct fuel injection relative to each of a ballistic-to-transition border and a lift-to-transition border of the direct injector map.4. The method of claim 3 , wherein the updating includes claim 3 , responsive to a distance of the direct fuel injection pulse-width from the ballistic-to-transition border of the direct injector map being smaller than the distance of the direct fuel injection pulse-width from the lift-to-transition border of the direct injector map claim 3 , decreasing a direct injected fuel mass to move from the pulse-width from the transition region into the ballistic region of the direct ...

METHODS AND SYSTEMS FOR ADJUSTING A DIRECT FUEL INJECTOR

Methods and systems are provided for reducing direct injector fueling errors due to injection variability in a transition region of a direct injector map. Fuel injection, including usage of one or more direct and port injected fuel pulses, may be planned based on engine operating conditions including engine temperature and driver demand. Responsive to any of the direct injected fuel pulses having a pulse-width that lies in a high variability transition region of the direct injector, the fuel injection may be adjusted via adjustments to a number and/or split ratio of the injections so as to not operate in the transition region. 1. A method for an engine , comprising a controller with computer readable instructions stored in non-transitory memory , for:delivering fuel to a cylinder on a combustion cycle as multiple direct injections; andresponsive to a fuel mass of one of the multiple direct injections being in a transition region of a direct injector map, updating one or more of a ratio of fuel delivered in each of the multiple direct injections and a number of the multiple injections to move the fuel mass of the one of the multiple direct injections out of the transition region.2. The method of claim 1 , wherein the transition region is positioned between a ballistic region and a lift region of the direct injector map claim 1 , and wherein direct injector variability in the transition region is higher than each of the ballistic region and the lift region.3. The method of claim 2 , wherein the updating is based on a position of the fuel mass relative to each of a ballistic-to-transition border and a lift-to-transition border of the direct injector map.4. The method of claim 3 , wherein the updating includes claim 3 , responsive to a distance of the fuel mass from the ballistic-to-transition border of the direct injector map being smaller than the distance of the fuel mass from the lift-to-transition border of the direct injector map claim 3 , decreasing the fuel mass ...

METHOD FOR ASCERTAINING A CORRECTION VALUE FOR FUEL METERING OF A FUEL INJECTOR

A method for ascertaining a correction value for fuel metering of a fuel injector of an internal combustion engine, in which fuel is injected from a high-pressure accumulator into a combustion chamber with the aid of the fuel injector, the fuel being injected into the combustion chamber in multiple separate injection procedures during one work cycle, a value representative of a static flow rate through the fuel injector being ascertained by ascertaining, for at least one of the multiple separate injection procedures, a ratio of a pressure change caused in the high-pressure accumulator by the at least one of the multiple separate injection procedures and an associated duration characteristic for the at least one of the multiple separate injection procedures being ascertained, and the correction value being ascertained based on a comparison of the representative value to a comparison value.

Method for Operating an Internal Combustion Engine, in Particular of a Motor Vehicle

A method for operating an internal combustion engine, which has at least one combustion chamber, at least one intake valve associated with the combustion chamber, and at least one injector associated with the combustion chamber, includes injecting fuel directly into the combustion chamber by the injector in order to operate the internal combustion chamber, where at least one partial stroke of the injector is performed while the intake valve is open. 19.-. (canceled)10. A method for operating an internal combustion engine , wherein the internal combustion engine comprises a combustion chamber , an intake valve associated with the combustion chamber , and an injector associated with the combustion chamber , comprising the steps of:injecting fuel directly into the combustion chamber by strokes of the injector during precisely one inlet stroke of the internal combustion engine and during a warm-up period for heating up the internal combustion engine, wherein a number of the strokes is four or five, wherein the strokes include a first partial stroke while the intake valve is open, and wherein at least one of the strokes is performed while the intake valve is closed.11. The method according to claim 10 , wherein the strokes include a second partial stroke.12. The method according to claim 10 , wherein each of the strokes is a partial stroke.13. The method according to claim 10 , wherein at least one of the strokes is a full stroke.14. The method according to claim 10 , wherein at least two of the strokes differ from one another with regard to a respective injection time.15. An internal combustion engine which performs the method according to . The invention relates to a method for operating an internal combustion engine, in particular of a motor vehicle, according to the preamble of claim .A method of this kind for operating an internal combustion engine, in particular of a motor vehicle, has long been known from the general prior art and particularly from the field of ...

Controller for internal combustion engine and method for controlling internal combustion engine

A controller for an internal combustion engine includes a processing circuit configured to execute a calculating process that calculates a returned air amount and an operating process that operates a fuel injection valve so that an air-fuel ratio of a mixture that is burned in a combustion chamber is controlled to a target value. The operating process includes under a condition in which the returned air amount is increased, having the fuel injection valve inject fuel increased in amount from a constant fuel amount, which is an amount of fuel injected when the returned air amount is unchanged, and under a condition in which the returned air amount is decreased, having the fuel injection valve inject fuel decreased in amount from the constant fuel amount.

Fuel injection device

A fuel injection device is used in an internal combustion engine having a combustion chamber partitioned by a cylinder head, a cylinder, and a piston crown surface so that at least one of the amount of NOx, Pmax, and a thermal efficiency η is maintained at a predetermined value. The fuel injection device includes a fuel injection change unit. The fuel injection change unit virtually divides the combustion chamber into N number of combustion zones where N is a natural number of 2 or more, and can change a fuel injection method according to the respective combustion zones. The fuel injection change unit divides the combustion chamber into the N number of combustion zones, thereby being capable of eliminating a difference of heat in the respective combustion zones, and precisely controlling an in-cylinder pressure P in the combustion chamber. As a result, the amount of NOx and the thermal efficiency can be optimized. Therefore, both of a reduction in the amount of NOx and the high thermal efficiency can be achieved.

FUEL ESTIMATION APPARATUS

A fuel estimation apparatus includes a combustion characteristic acquisition portion and a mixing ratio estimation portion. The combustion characteristic acquisition portion acquiring a combustion characteristic value indicating a physical amount relating to a combustion of an internal combustion engine acquires the combustion characteristic values of the combustions executed in different combustion conditions. The mixing ratio estimation portion estimates the mixing ratios of various components included in a fuel, based on the combustion characteristic values acquired by the combustion characteristic acquisition portion. 1. A fuel estimation apparatus comprising:a combustion characteristic acquisition portion acquiring a combustion characteristic value indicating a physical amount relating to a combustion of an internal combustion engine, the combustion characteristic acquisition portion acquiring the combustion characteristic values of the combustions executed in different combustion conditions; anda mixing ratio estimation portion estimating mixing ratios of various components included in a fuel, based on the combustion characteristic values acquired by the combustion characteristic acquisition portion.2. The fuel estimation apparatus according to claim 1 , whereinthe component that is an estimation object of the mixing ratio is a component that is divided by types of a molecular structure.3. The fuel estimation apparatus according to claim 2 , whereinthe types of the molecular structure include at least one of a normal paraffin type, an isoparaffin type, a naphthenic type, or an aromatic type.4. The fuel estimation apparatus according to claim 1 , whereinthe combustion condition is a condition specified by a combination of parameters of plural types.5. The fuel estimation apparatus according to claim 4 , whereinthe parameters of plural types include at least one of a cylinder pressure, a cylinder temperature, an intake-gas oxygen concentration, or an injection ...

CONTROL SYSTEM FOR COMPRESSION-IGNITION ENGINE

A compression-ignition engine control system is provided, which includes an intake phase-variable mechanism and a controller. The controller controls the intake phase-variable mechanism to form a gas-fuel ratio (G/F) lean environment in which burnt gas remains inside a cylinder and an air-fuel ratio is near a stoichiometric air-fuel ratio, and controls the spark plug to spark-ignite the mixture gas to combust in a partial compression-ignition combustion. The controller controls the intake phase-variable mechanism to retard, as an engine speed increases at a constant engine load, an intake valve close timing on a retarding side of BDC of intake stroke and an intake valve open timing on an advancing side of TDC of exhaust stroke, and controls the intake phase-variable mechanism so that a change rate in the intake valve open timing according to the engine speed becomes larger in a high engine speed range. 1. A control system for a compression-ignition engine including a cylinder , an intake passage , an exhaust passage , an intake port communicating the intake passage to the cylinder , an intake valve configured to open and close the intake port , an exhaust port communicating the exhaust passage to the cylinder , an exhaust valve configured to open and close the exhaust port , an injector configured to inject fuel into the cylinder , and a spark plug configured to ignite a mixture gas containing the fuel injected by the injector and air , the engine executing partial compression-ignition combustion in which the mixture gas is spark-ignited with the spark plug to be partially combusted by spark ignition (SI) combustion and the remaining mixture gas self-ignites to be combusted by compression ignition (CI) combustion , comprising:an intake phase-variable mechanism configured to simultaneously change an open timing and a close timing of the intake valve; anda controller including a processor configured to control parts of the engine, including the intake phase-variable ...

FUEL INJECTION CONTROL DEVICE

A timing setting section sets a fuel injection timing in a second half of a compression stroke of an internal combustion engine, at a predetermined computation timing, which is set for each combustion cycle of the internal combustion engine, when an amount of a reduction target component in exhaust gas detected by an exhaust gas sensor is greater than or equal to a predetermined value, on condition that the internal combustion engine satisfies a predetermined high temperature condition. The fuel injection control device further includes an injection control unit to compute a fuel injection period based on the injection timing set by the timing set unit and to control the fuel injection valve based on the injection timing and the injection period. 1. A fuel injection control device configured to control a fuel injection system , the fuel injection system including an accumulator configured to store high-pressure fuel , a fuel injection valve for direct injection configured to directly inject high-pressure fuel in the pressure accumulator into a combustion chamber of an internal combustion engine , and an exhaust gas sensor configured to detect a component in exhaust gas from the internal combustion engine , the fuel injection control device comprising:a timing set unit configured to set a fuel injection timing in a second half of a compression stroke of the internal combustion engine, when a component amount of a reduction target component in exhaust gas detected by the exhaust gas sensor is greater than or equal to a predetermined value, on condition that the internal combustion engine satisfies a predetermined high temperature condition at a predetermined computation timing that is set for each combustion cycle of the internal combustion engine; and to compute an injection period of fuel based on the injection timing that is set by the timing set unit and', 'to control the fuel injection valve based on the injection timing and the injection period., 'an injection ...

COMBUSTION CONTROL DEVICE

A timing computation unit determines whether to execute compression latter-half injection to inject fuel in a latter half of a compression stroke of an internal combustion engine based on an operation state of the engine and computes an injection timing and an ignition timing of fuel. A timing correction unit corrects the computed injection timing to an advance side and corrects the computed ignition timing to a retard side, in a case where a detected fuel pressure is lower than a target fuel pressure. The timing correction unit corrects the computed injection timing to the retard side and corrects the computed ignition timing to the advance side, in a case where the detected fuel pressure is higher than the target fuel pressure. A combustion control unit controls a fuel injection device and an ignition device based on the injection timing and the ignition timing. 1. A combustion control device for a combustion system , the combustion system including a fuel injection device to inject high-pressure fuel in a pressure accumulator into a combustion chamber of an internal combustion engine , an ignition device to ignite fuel in the combustion chamber , and a fuel pressure sensor to detect pressure of fuel to be injected into the combustion chamber , the combustion control device comprising:a target set unit configured to set a target fuel pressure based on an operation state of the internal combustion engine; to determine whether to execute compression latter-half injection to inject fuel in a latter half of a compression stroke of the internal combustion engine based on the operation state of the internal combustion engine and', 'to compute an injection timing and an ignition timing of fuel;, 'a timing computation unit configured'} to correct the injection timing of the compression latter-half injection, which is computed by the timing computation unit, to an advance side and to correct the ignition timing, which is computed by the timing computation unit, to a retard ...

Method for controlling and regulating an internal combustion engine

Vorgeschlagen wird ein Verfahren zur Steuerung und Regelung einer Brennkraftmaschine (1), bei dem ein Einzelspeicherdruck (pE) eines Common-Railsystems in einem Messintervall erfasst und abgespeichert wird, bei dem für den gespeicherten Einzelspeicherdruck (pE) ein Bewertungsfenster bestimmt wird, innerhalb dessen eine Einspritzung veranlasst wurde, bei dem in einem ersten Schritt in diesem Bewertungsfenster sowohl ein repräsentativer Spritzbeginn als auch ein Prüfspritzende in Abhängigkeit der erfassten Druckwerte bestimmt werden, in einem zweiten Schritt in diesem Bewertungsfenster sowohl ein Prüfspritzbeginn als auch ein repräsentatives Spritzende in Abhängigkeit der erfassten Druckwerte bestimmt werden, bei dem der repräsentative Spritzbeginn gegen den Prüfspritzbeginn plausibilisiert wird und bei dem das repräsentative Spritzende gegen das Prüfspritzende plausibilisiert wird. A method is proposed for controlling and regulating an internal combustion engine (1), in which an individual accumulator pressure (pE) of a common rail system is detected and stored in a measuring interval in which an evaluation window is determined for the stored individual accumulator pressure (pE), within which one Injection was initiated, in which in a first step in this evaluation window both a representative injection start and a test injection end are determined in dependence of the detected pressure values, determined in a second step in this evaluation window both a test injection start and a representative injection end depending on the detected pressure values in which the representative start of injection is made plausible against the beginning of the test injection and in which the representative injection end is plausibilized against the test injection end.

In-cylinder injection engine

用于内燃发动机中的喷射管理方法

直接喷射式发动机喷射管理方法包括，计划从所谓的单次喷射方案（初始1个脉冲）切换成所谓的多次喷射方案（MPL激活），在单次喷射方案中，在一次喷射中喷射在燃烧循环期间所喷射的大部分燃料量，在多次喷射方案中，执行连续多次喷射以喷射燃烧循环期间的燃料，以及进行相反的切换。当基于一个或更多个发动机参数的条件得到满足（MPL cdn ok）时，选择多次喷射方案。多次喷射方案被限制在预定时间间隔（Tact_MPL_max）内，即使在该间隔结束时仍然满足采用多次喷射方案的条件。