Remote engine starter system

摘要

A tachometer apparatus of a remote vehicle starting system for providing tachometric information. The apparatus includes an antenna disposed proximate to the engine compartment of the vehicle and adapted to pick up an RF signal generated by the firing of the spark plugs in the engine compartment. The apparatus also includes an RF detector having the antenna coupled to the input thereof and providing at its output a tachometer signal for coupling to a controller and providing a signal indicative of the running status of the vehicle engine and of the tach speed of the engine.