摘要:
A combustion engine with at least one injector for the injection of liquid fuel into at least one combustion chamber is provided. The injector can be regulated by means of a regulating device through an actuator triggering signal, wherein the at least one injector has an outlet opening that can be closed by means of a needle. An algorithm is contained in the regulating device, which receives as an input value at least the actuator trigger signal, and which calculates via an injector model the mass of liquid fuel transferred via the outlet opening of the injector. The regulating device compares by means of the injector model, the calculated mass with a required target value ref of the mass of liquid fuel, to correct the actuator trigger signal.
摘要:
An engine control device controls a cylinder direct fuel injection type spark ignition engine provided with a fuel injection valve configured to directly inject fuel into a cylinder and an ignition plug configured to perform spark ignition for a gas mixture inside the cylinder. The engine control device executes a catalyst warm-up operation for retarding an ignition timing, during a compression stroke of the fuel injection timing, in a case where it is necessary to warm up an exhaust gas purifying catalyst inserted into an exhaust passage. In addition, the engine control device increases a valve overlap period as a piston crown surface temperature increases during execution of the catalyst warm-up operation.
摘要:
Brennkraftmaschine, mit: - einer Regeleinrichtung - wenigstens einem Injektor für flüssigen Kraftstoff, wobei der wenigstens eine Injektor über eine Ausbringöffnung für den flüssigen Kraftstoff verfügt - wobei der wenigstens eine Injektor über eine Leitung für flüssigen Kraftstoff mit einem Sammelvolumen verbunden ist, über welche flüssiger Kraftstoff vom wenigstens einen Injektor zum Sammelvolumen strömen kann, wobei ein durch die Regeleinrichtung mittels eines Steuersignals einstellbares Stellglied (8) vorgesehen ist, über welches zum Einstellen der über die Ausbringöffnung des Injektors ausgebrachten Masse an flüssigem Kraftstoff der Gegendruck (p) in der Leitung einstellbar ist, sowie ein Verfahren zum Betreiben einer solchen Brennkraftmaschine und eines Injektors einer solchen Brennkraftmaschine.
摘要:
A method is disclosed to determine the opening degree of injectors in cylinders of a combustion engine, where the combustion engine has at least three cylinders. The injectors are connected to a fuel accumulator in a common rail fuel injection system; the fuel supply to the fuel accumulator is interrupted; and subsequently a test injection of fuel is carried out into at least two and, at most, all but for one cylinder at a time, in different combinations, at such a time that the injection does not cause any combustion in the cylinders. The pressure decreases caused in connection with the different test injections are measured, and the pressure decrease that is attributable to at least one specific injector is calculated based thereupon, which is, in turn, used in the determination of the injector's opening degree.
摘要:
L'invention concerne un procédé d'estimation de la température (T3) des gaz d'échappement produits par un moteur à combustion interne comprenant une chambre de combustion dans laquelle est injectée une quantité totale de carburant, le procédé comprenant les étapes de : - détermination (21) de la température d'admission (T2) des gaz entrant dans la chambre de combustion, - détermination (20) de la quantité totale de carburant injectée dans la chambre de combustion, - estimation (22) de la température des gaz d'échappement à partir de la température d'admission (T2) et de la quantité totale de carburant injectée,
caractérisé en ce que la température (T3) des gaz d'échappement est estimée à partir d'une relation logarithmique entre le ratio de la température (T3) des gaz d'échappement par la température d'admission (T2) et la quantité totale de carburant injectée.
摘要:
Method for determining a relationship between the opening time for an injector (9) of a cylinder (8) in a combustion engine (1) and the amount of fuel injected by the injector, according to which method: - during a succession of power strokes in which the same opening time is applied to the injector at each of them, the injector is caused to inject fuel in the form of late injections so this fuel undergoes no combustion in the cylinder and this unburnt fuel accompanies the engine's exhaust gases to a fuel oxidation device (4) in order to be oxidised therein and cause a increase in the temperature of the exhaust gases, - a temperature increase value which represents said increase in the temperature of the exhaust gases is determined, - a calculation value which represents the mass flow of said fuel is determined on the basis of the temperature increase value, a fuel mass flow value representing the mass flow of fuel injected into and burnt in the engine and an air mass flow representing the mass flow of air in the engine's air intake, and - said relationship is determined on the basis of the calculation value.
摘要:
A method of operating an internal combustion engine with a direct injection system controlled by an engine control unit (ECU) is described. The ECU comprises a flow curve table storing data indicative of fuel quantities vs. injector pulse widths. The method comprises an injector learning event during which actual fuel values related to a fuel injector are determined, said injector learning event being enabled during an idle or deceleration condition of said engine and comprising the steps of: operating the engine into a homogeneous combustion mode; and concurrently degrading the combustion and/or splitting the injection pulses while monitoring the combustion performance to determine learned fuel data.
摘要:
A fuel injection device 1A which includes a common rail 4 for accumulating fuel delivered by a high pressure pump 3B in a pressure-accumulated state, an injector for injecting in a cylinder of the diesel engine fuel supplied through a high pressure fuel supply passage 21 branched from the common rail 4, and an ECU 80A for outputting an injection command signal for injecting the fuel from the injector 5A. The fuel injection device 1A further includes an orifice 75 in the high pressure fuel supply passage 21 on the side of the common rail 4, and a differential pressure sensor S dP for detecting the pressure difference of the pressures on the upstream and downstream sides of the orifice 75. The ECU 80A calculates an actual fuel supply amount that passes the orifice 75 based on a signal from the differential pressure sensor S dP .