Apparatus for producing an engine-speed signal for an electronic fuel injection system

摘要

Apparatus for producing a signal representative of engine speed (RPM) for use in an electronically controlled fuel injection system. The apparatus includes means for producing a first train of pulses in which the pulse intervals are dependent upon engine speed, and a signal processor for receiving the first train of pulses and producing a second train of pulses in which the pulse intervals correspond, at least approximately, to the mean value of the pulse intervals in the first pulse train.