VERFAHREN UND ANORDNDUNG ZUM NACHWEIS DER ROTATIONSRICHTUNG BEI DIESELMOTOREN.

摘要

A diesel engine has a pulse generator (10) on the crankshaft producing reference signals (BM) and an inductive transducer (11) giving a signal (FB) initiated by fuel injection commencement The reference mark (BM) and injection commencement (FB) signals are respectively applied to the start and stop inputs of a counter (12) which is fed a counting pulse train (n) indicative of engine speed, thus the counter (12) represents the actual angle between reference and injection signals (BM,FB) and feeds to a comparator (14) which checks the angle against a threshold value. With normal diesel running the counter (12) has less than 20 deg.C between signals but with reverse rotation will have at least 40 deg.C between signals and if this is detected the comparator sends a stop engine signal.