Electronic governor interface module

Details Electronic governor interface module Electronic governor interface module

1988-07-14

1990-04-10

Miller, Carl Stuart

Internal-combustion engines

Engine speed regulator

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

123494, 73119A, F02M 3900

Patent

active

049150723

ABSTRACT:
An electronic module interfaces a microcomputer with the fuel injection equipment of a diesel engine so that the microcomputer, acting through the module, exercises control over the fuel injected into the engine. A pulse width modulated fuel deliver control signal issued by the microcomputer is transmitted through the module to energize a proportional solenoid actuator that positions the fuel rack. Rack position is sensed by an eddy current sensor that provides feedback through the module to the microcomputer so that the rack position is closed-loop controlled. The sensor has a measurement coil for measuring rack position and a reference coil for temperature compensation. The two coils are connected in a circuit of the module that produces a pulse width modulated feedback signal which is supplied to the microcomputer in synchronism with the fuel deliver control signal. This latter circuit comprises an L/R monostable for each coil and pulse stretchers that stretch the output pulses from the monostables. The pulse stretchers' outputs are supplied to a gate that develops the feedback signal to the microcomputer.

REFERENCES:
patent: 3718123 (1973-02-01), Eckert
patent: 4531491 (1985-07-01), Iiyama
patent: 4538571 (1985-09-01), Buck
patent: 4559816 (1985-12-01), Ebert
patent: 4700143 (1987-10-01), Anthony
patent: 4708112 (1987-11-01), Nanjyo
patent: 4766863 (1988-08-01), Fujimori
patent: 4798084 (1989-01-01), Takahashi

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