Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...
Patent
1982-08-13
1984-07-17
Nelli, Raymond A.
Internal-combustion engines
Engine speed regulator
Having condition responsive means with engine being part of...
123352, F02M 2506, G05D 1362, F02D 1110
Patent
active
044599544
ABSTRACT:
An engine governor is disclosed which includes a tachometer circuit, a control signal generator responsive to the tachometer circuit and to a threshold generating circuit, a pressure/temperature fault detector, and a logic circuit responsive to the control signal generating circuit and the fault detector. A driver circuit is responsive to the signal passed by the logic circuit. The driver circuit controls a proportional solenoid which in turn controls engine speed. The tachometer circuit of this invention utilizes a gated sample and hold circuit which is triggered in phase with the AC component of a voltage on an integrating capacitor in order to provide particularly fast response times. The disclosed governor is arranged in a modular fashion such that removable tachometer circuits can be plugged into a common driver circuit. The disclosed governor also includes an over/under speed detector circuit which operates first to reduce engine speed to idle when an over speed or under speed condition is sensed, and then to interrupt the operation of the ignition system of the engine after a selected time period.
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Slavik William H.
Swanberg Roger A.
Hoof Products Co.
Nelli Raymond A.
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