Motor vehicle indicating and warning system - employs tachometer and electronic circuits to monitor warning on reaching parameter set limit

摘要

The signal from speedometer and revolution counter is derived from the tachometer driven by a rotating part of the vehicle, and the active part of the transmitting unit T is determined by a timer R. During the active period, unit T converts the received signals with the decoder D and display unit indicates the data in a digital form. The sensed parameters may include the level of fuel in the tank, pressure of oil and other characteristics of the vehicle. The unit can be readily built-in in the existing cars or directly assembled on the engine.