The invention relates to an apparatus for a diesel engine. In particular, the invention relates to a diesel engine with a distributor injection pump with which is associated an electronically regulated fuel feed control mechanism with a rotary magnet which operates a control valve of the injection pump. Circuits for electronically controlled diesel engines have become known by which the engine speed is prevented from exceeding a certain limit. In the case of a disturbance of the electronic shut-off the rotatory speed could continue to increase to the point of mechanical destruction.
Consequently, an additional protective circuit is usually provided which prevents the engine from overspeeding if a defect occurs, for example, in the electronic controller. Such a circuit is the subject matter of DE-AS 19 62 573.
In diesel engines a larger amount of fuel must be injected for starting, which is greater than the full load fuel feed rate. In electronically controlled diesel engines which assist in driving a motor vehicle, an error in the electronics can abruptly shift the fuel control mechanism to the starting feed rate, resulting in a acceleration of the vehicle. The known overspeed safety devices are in this case ineffectual since they do not become active until the excess engine speed is reached.
USPTO Backgrounds
USPTO Backgrounds