초록 ▼

This invention relates to an automatic stopping device for stopping a diesel engine through cutting off the fuel supply to the latter upon detect of an accidental reversing of the diesel engine. The reversing of automobile diesel engines is rather easy to occur. In the event of an accidental reversi

This invention relates to an automatic stopping device for stopping a diesel engine through cutting off the fuel supply to the latter upon detect of an accidental reversing of the diesel engine. The reversing of automobile diesel engines is rather easy to occur. In the event of an accidental reversing of the diesel engine, it is necessary to stop the engine immediately, for otherwise the engine may be damaged seriously. According to the invention, the reversing of the diesel engine is detected through the detection of change of phase relation between two phases of output voltage derived from a multi-phase alternator connected to the engine and for charging up the batteries, the change of phase relation occuring when the engine is accidentally reversed. More specifically, the device includes a delay-type flip flop having a data input terminal for receiving the output voltage of one of the phases of the alternator and a clock input terminal adapted to receive the output voltage of another phase, such that an output voltage of a high voltage and low voltage are generated at the output terminal of the flip-flop when the engine is running in the forward and backward direction. The device further includes an engine stopping actuator adapted to stop the diesel engine upon receipt of the low level signal.

대표청구항 ▼

An automatic stopping device for diesel engines comprising: a multi-phase alternator connected to the output shaft of a diesel engine and having a plurality of output coils; a delay-type flip-flop having a data input terminal connected to the output coil of one of the phases of said multi-phase alte

An automatic stopping device for diesel engines comprising: a multi-phase alternator connected to the output shaft of a diesel engine and having a plurality of output coils; a delay-type flip-flop having a data input terminal connected to the output coil of one of the phases of said multi-phase alternator and adapted to receive an input signal having forms of low and high levels, and a clock input terminal connected to the output coil of another phase of said multi-phase alternator and adapted to receive an input signal having the forms of low and high levels, said flip-flop being adapted to memorize the form of the input signal at said data input terminal when the form of input signal at said clock input terminal is changed from one to the other; and an engine stopping actuator having an input terminal connected to the output terminal of said delay-type flip-flop; the phase relation of said input signals to said data input terminal and said clock input terminal being so selected that, when said engine is operating in the forward direction, a high level signal representing the forward operation is generated at said output terminal of said delay-type flip-flop while, when said engine operates in the backward direction, a low level signal representing the backward operation is generated at said output terminal of said delay-type flip-flop, said engine stopping actuator being adapted to stop said diesel engine in response to said low level signal.