Switching control circuit, especially for motor vehicle engines

Details Switching control circuit, especially for motor vehicle engines Switching control circuit, especially for motor vehicle engines

1977-05-09

1981-03-31

Cangialosi, S. A.

Internal-combustion engines

Engine speed regulator

Engine speed reduction by fuel cutoff

123198DB, F02D 3300

Patent

active

042586828

ABSTRACT:
The actuation of electromagnetic devices, especially fuel or mixture shut-off solenoid valves in internal combustion engines is controlled on the basis of two engine variables, namely engine speed (rpm) and induction tube vacuum, for the purpose of suppressing fuel or mixture admission to the engine when the engine is being operated at higher than normal idling speed and while the throttle is closed (engine vacuum high). These twin conditions indicate that the engine is used for braking, i.e., it is being overrun. The position of the throttle is sensed by a vacuum switch which responds to induction tube vacuum and releases the actuation of the solenoid valve. The solenoid valve is further engaged by an rpm-dependent circuit in which a capacitor is periodically discharged by rpm related pulses.

REFERENCES:
patent: 2084426 (1937-06-01), Berry
patent: 3430616 (1969-03-01), Glockler et al.
patent: 3570460 (1971-03-01), Rabus
patent: 3596640 (1971-08-01), Bloomfield
patent: 3612013 (1971-10-01), Gambill
patent: 3794003 (1974-02-01), Reddy
patent: 3796197 (1974-03-01), Locher et al.
patent: 3809028 (1974-05-01), Luchaco
patent: 3916170 (1975-10-01), Norimatsu et al.
patent: 3916865 (1975-10-01), Kiencke et al.
patent: 4064844 (1977-12-01), Matsumoto et al.

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