Robert Boschgmbh

Gerd Auracher

Winfried Moser

Rolf Daumer

Albrecht Clement

Thomas Wilfert

Helmut Schwarz

Joerg Lange

Gustav Virgilio

Wilfried Venzke

Thomas Theml

Bernhard Weichel

A method and apparatus for injecting fuel into the cylinders of an engine which has an injection valve for each cylinder that is positioned so that it can injection fuel into an open inlet port. The method and apparatus provide for fuel to be partially injected into a suction pipe leading to the cylinder before the corresponding intake-valve arrangement opens, so that it is stored in advance. Fuel is also partially injected into the open inlet port. A value which is a measure of the temperature in the suction pipe also is acquired. On the basis of this acquired value, the total required fuel quantity to be stored in advance is determined and to what extent this fuel quantity will be injected after the injection-valve arrangement opens. The method and apparatus avoid the formation of wall film in the suction pipe as a result of storing too much injected fuel in advance.

Method and apparatus for injecting fuel into the cylinders of an engine

An electronic control system for internal combustion engines which has signal generator circuits for the fuel metering and for the ignition. During starting, especially in the case of cold starting, three different phases are provided for controlling the injected fuel quantity and for regulating the fuel quantity downward; furthermore, the ignition angle is adjusted in accordance with temperature and rpm. In terms of the fuel metering, the boundary between the first and second phase is dependent on the rpm or on a maximum total number of revolution cycles, and the end of the second phase is predetermined by a minimum metering signal which is dependent on temperature. In the ignition system, there is an increasing adjustment toward 'early' approximately in the rpm range between 200 and 600 revolutions per minute as well as an increasing adjustment toward 'late' as the temperature increases.

Electronic control system for internal combustion engines

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Beilstein, Germany

Gerd Auracher