Robert Boschgmbh

Hans Deichsel

Helmut Rembold

Klaus Joos

Heinz Stutzenberger

Uwe Mueller

Gottlob Haag

Norbert Miller

Ralf Klein

Harald Pietsch

Bernhard Erb

In a process for determining the amount of time elapsed between stopping a motor vehicle engine and restarting the engine, when the engine is restarted, the time information representing the time when the engine was stopped is subtracted from the time information representing the time when the engine was restarted. The time information representing the respective times is obtained from an on-board clock that serves to display the time in the motor vehicle.

Process for determining the time elapsed between stopping a motor vehicle engine and restarting the engine.

A fuel supply system with two series-connected pumps and fuel injection valves that inject fuel directly into a combustion chamber of an engine. The system includes a relief device. In a simple embodiment, the relief device can assure that the pressure in the pressure line can drop when the engine has been shutoff. The relief line may, however, also be embodied such that during the entire time of engine operation, the pressure in the pressure line can be lowered at any time as needed. The apparatus and the method are intended for an internal combustion engine of a vehicle.

Fuel supply system and method for operating an internal combustion engine

A fuel supply systems with two series-connected pumps and with fuel injection valves that inject fuel directly into a combustion chamber of an engine in which a starting process takes less time because of the small feed quantity of the second fuel pump. The system includes a valve device which assures that during the starting process the first fuel pump furnishes the fuel to the fuel valves at elevated feed pressure. In many cases, this elevated feed pressure suffices to start the engine in the quickest possible time. The apparatus and the method are intended for an internal combustion engine of a vehicle.

Fuel supply and method for operating an internal combustion engine

A method of proportioning fuel in an air/fuel mixture to be fed to an internal combustion engine upon starting, which method ensures reliable starting, even when fuel-injection settings which have been determined for good fuel, are used with poor fuel. As long as a test-end condition has not been satisfied, the engine's speed of rotation is checked to determine whether an increase in speed of rotation is present within a predetermined range. If not, a stored correction value for correcting the amount of fuel injected, which is determined as a function of the state of operation of the engine, is changed in such a manner so as to yield an air/fuel mixture which is ignitable in a desired manner, which mixture leads, upon combustion, to an increase in the speed of rotation within the predetermined range.

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Murr, Germany

Hans Deichsel