Internal-combustion engines – Noncompression
Patent
1977-09-16
1980-05-20
Konick, Bernard
Internal-combustion engines
Noncompression
122102, 123 32EG, 123 32EH, 123 32EL, F02D 104
Patent
active
042033950
ABSTRACT:
A closed loop idle speed controller for a fuel injection system operates to control an air valve which controls an air passage bypassing the main air flow. The air valve is positioned by an actuator whose output position is controlled by fuel pressure operating against a spring. The fuel pressure is controlled by a pair of solenoid-operated on-off valves, one of which responds to electrical signals representing engine speeds below a speed reference to direct fuel to the actuator and the other of which responds to signals representing speeds above the reference to permit fuel to be withdrawn from the actuator and returned to its source. Each of the solenoid on-off valves is supplied from a pulse width modulator. The engine-driven distributor provides pulses responsive to engine speed which are connected to a sample and hold circuit. The sample and hold circuit provides d.c. voltage levels proportional to engine rpm, modified with changes in engine coolant temperature, to a pair of summing amplifiers which compare the modified speed voltage with an idle speed reference voltage to produce speed error signals. Underspeed signals are connected to the pulse width modulator connected to the supply solenoid on-off valve and overspeed signals to the modulator connected to the return solenoid on-off valve. Certain auxiliary circuits provide for modified operation during starting, during hot starts, during closed throttle operation, or during deceleration with a manual transmission car.
REFERENCES:
patent: 3643635 (1972-02-01), Milam
patent: 3664311 (1972-05-01), Endo
patent: 3750632 (1973-08-01), Zechnall
patent: 3822679 (1974-07-01), Hobo
patent: 3858561 (1975-01-01), Aono
patent: 3863054 (1975-01-01), Monpetit
patent: 3868933 (1975-03-01), Bigalke
patent: 3889647 (1975-06-01), Rachel
patent: 3960130 (1976-06-01), Peterson
patent: 3964457 (1976-06-01), Coscia
Cromas Joseph C.
Green Thomas P.
Faber Alan
Konick Bernard
Smith Robert C.
The Bendix Corporation
Thornton William F.
LandOfFree
Closed-loop idle speed control system for fuel-injected engines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Closed-loop idle speed control system for fuel-injected engines , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed-loop idle speed control system for fuel-injected engines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-445681