Electronic governor for injection-type internal combustion engines

Claim 1

An electronic governor for an injection-type internal combustion system comprising: a DC voltage generating circuit for generating a DC voltage proportional to the speed of rotation of the engine; a bridge circuit including a variable inductance coil located in one arm thereof, an oscillator circuit connected across the input of said bridge, the impedance of said coil being a function of the position of the fuel supply lever of the engine and the unbalance output voltage of said bridge circuit correspondingly being a function of the position of the said fuel supply lever; a voltage comparator circuit for comparing the output voltage of said DC voltage generating circuit with the unbalance output voltage of said bridge circuit; a variable amplification amplifier circuit for amplifying the output of said voltage comparator circuit and including means for varying the amplification of said amplifier in accordance with a desired rate of automatic decrease in the quantity of fuel injected corresponding to the Decrease in air-intake efficiency of the engine cylinders with rising engine speed under full load conditions; and an electromagnetic fuel control mechanism for controlling a fuel control rod responsive to the output of said amplifier circuit.