Control system

Details Control system Control system

1985-02-13

1986-12-16

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

361152, F02M 5100

Patent

active

046288856

ABSTRACT:
An electronic control system for a solenoid based actuator for a fuel system of an engine includes a switchable transistor connected in a series circuit with a current sensing resistor and the solenoid of the actuator. A power circuit supplies switching pulses to the transistor through an AND gate. A control circuit supplies a control signal to the power circuit and also a trigger signal to a monostable circuit. The monostable circuit supplies an enable signal to the AND gate. The control circuit receives a feedback signal from the sensing resistor and as long as this lies within prescribed limits the control circuit will supply the control signal and the trigger signal. If the feedback signal lies outside the prescribed limits at least the trigger signal will be halted so that after the time period of the monostable circuit has lapsed the transistor will receive no further switching pulses. A fuse is connected in series with the solenoid which will blow in the event that the solenoid remains energized for longer than a prescribed time.

REFERENCES:
patent: 4051817 (1977-10-01), Hattori et al.
patent: 4358812 (1982-11-01), Lo Cascio et al.
patent: 4377144 (1983-03-01), Takahashi
patent: 4438496 (1984-03-01), Ohie
patent: 4452210 (1984-06-01), Sasayama et al.
patent: 4492913 (1985-01-01), Arnold et al.
patent: 4511945 (1985-04-01), Nielson

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