Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque.

Method and system for engine control

During a short duration injection, a triangular geometry is drawn in terms of the injection rate with respect to time, while a trapezoidal geometry is drawn during a long duration injection The ON timing of the drive pulse is determined to be at a valve opening pressure achieving time before the start point of formation in time of the geometry An injection pulse duration is determined from "the valve opening pressure achieving time+a needle rise time-a valve closing pressure achieving time," and then the OFF timing of the drive pulse is determined

Fuel injection system

Exhaust emission control is exercised to restrict the exhaust amounts [g] of HC, CO, NOx, and the like However, since the intake air amount for startup unduly increases due to an engine speed overshoot for startup, the exhaust amounts of HC, CO, and NOx increase excessively Therefore, there is a need for optimizing the intake air amount for startup The present invention proposes an engine startup control method that assures excellent startability and low exhaust emissions (small gas amount) Disclosed is an engine control device for starting an engine (from its stop state) The engine control device includes a section for setting a target engine operating state of each combustion; a section for detecting an actual engine operating state of each combustion; and a section for computing a control parameter for each subsequent combustion in accordance with the target engine operating state of each combustion and the actual engine operating state of each combustion

Engine control device

A fuel injection system for an internal combustion engine is provided which includes a fuel injector equipped with an actuator and a nozzle needle. The actuator works to lift the nozzle needle to inject fuel into an internal combustion engine. A controller controls an operation of the actuator to change an amount of lift of the nozzle needle a given number of times for a target injection duration, thereby ensuring the uniformity of size of atomized particles of the fuel sprayed from the fuel injector.

Fuel injection system designed to enhance uniformity of size of atomized particles of fuel

An automotive fuel injector leakage tester (10) comprising a mount (22) for such an injector (32) and a flowmeter (66). An injector (32) contains a first liquid when under test to supply such liquid to the injector nozzle (34) so that such liquid can leak therethrough finto an interface passageway (58). The interface passageway (58) contains a second liquid which is immiscible with the first liquid, the tester (10) being so constructed that the interface between the first and second liquide remains within the interface passageway (58) whilst the flowmeter (66) provides a measure of the leakage of the first liquid through the nozzle (34) of such an injector (32). The invention extends to a method of testing an automotive fuel injector for leakage, a tester with a heat transfer detection flowmeter (in which the saure liquid can flow through the injector as flows through the flowmeter), apparatus and a method of bringing two componente together along a slanting imaginary line in a bath of liquid, and a master leak for calibrating an automotive fuel injector tester.

An automotive fuel injector leakage tester

A method for operating an internal combustion engine (12) having at least two cylinders (14; 16), wherein fuel from a pressure accumulator (22) in the at least two cylinders (14; 16) associated with combustion chambers is injected. The method is characterized by the following steps: - setting a into a combustion chamber of a first cylinder (16) injected in a first injection amount of fuel (54) to a target value; - determining a first change (52a, 52b) of a fuel pressure (26) in the pressure accumulator (22) which arises as a result of the first injection of fuel from the pressure accumulator (22) into the combustion chamber of the first cylinder (16); - determining a second change (52a, 52b) of a fuel pressure (26) in the pressure accumulator (22) which arises as a result of a second injection of fuel from the pressure accumulator (22) into a combustion chamber of a second cylinder (14); - performing another injection of fuel into the combustion chamber of the second cylinder (14) in response to the first change (52a, 52b) of the fuel pressure (26) and / or second change (52a, 52b) of the fuel pressure (26), in particular for - approaching or equal points of the second change of the fuel pressure at the first change of the fuel pressure.

Method and device for operating an internal combustion engine

The method involves determining a correction value for partial fuel injection in a cylinder of an internal combustion engine by stimulating an injection pattern and by changing drive vibration in the internal combustion engine. The drive vibration is caused by the injection pattern. Amplitude of the drive vibration is minimized or adjusted to minimum. The drive vibration is changed based on the amplitude or a phase position of the drive vibration. The effect of the drive vibration is determined by amount and/or phase of speed information. An independent claim is also included for a device for calibrating injection amount of partial fuel injection into a fuel injection system of an internal combustion engine of a motor vehicle.

Method for calibrating amount of partial fuel injection into fuel injection system of internal combustion engine of motor vehicle, involves determining correction value for fuel injection by stimulating pattern and by changing vibration

The invention relates to a method and device for leak-proofing a fuel injection valve for an internal combustion engine, wherein the inventive method consists in determining a temperature quantity characterising the temperature of at least one part of said fuel injection valve and in concluding the presence of a leakage on the basis of said temperature quantity.

Method and device for leak proofing a fuel injecting valve for an internal combustion engine

A device and a method for determining a fuel pressure and/or an injected amount of fuel are described. A fuel injection unit meters the fuel to an internal combustion engine as a function of a first and a second trigger signal. The first trigger signal controls the start and end of fuel metering, and the second trigger signal controls the pressure buildup. The variation of pressure is determined on the basis of at least the first trigger signal and the second trigger signal.

Method and device for controlling fuel metering into an internal combustion engine

A fuel injection system for an internal combustion engine in which pressurized fuel is made available in a pressure accumulator and a fuel pressure prevailing in the pressure accumulator is ascertained with the aid of a pressure sensor and in which the fuel enters a combustion chamber of the internal combustion engine through at least one fuel injection device. A slope of a curve, which links a pressure difference in the pressure accumulator during a fuel injection to an injected fuel quantity, is ascertained and the fuel pressure prevailing in the pressure accumulator is inferred from the slope.

Method for operating a fuel injection system

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