Engine overspeed control circuit with defeat detection

Details Engine overspeed control circuit with defeat detection Engine overspeed control circuit with defeat detection

1987-07-23

1988-03-29

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

123335, F02D 4500

Patent

active

047336447

ABSTRACT:
Engine overspeed control circuitry (200) includes a comparator (206) comparing tachometer voltage against a reference voltage, and disabling the engine above a given speed. The overspeed protection is defeated by blowing a fuse (222) in circuit with a comparator input (212) changing the impedance thereat, which leaves a permanent record of the defeat for subsequent detection.

REFERENCES:
patent: 971334 (1910-09-01), Whalen
patent: 3182648 (1965-05-01), Schneider et al.
patent: 3281783 (1966-10-01), Adams

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