Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-04-28
1976-09-21
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123 32EA, 123140MC, 60285, F02M 104, F01N 300
Patent
active
039812880
ABSTRACT:
A fuel supply and metering valve assembly used for injection of fuel to an internal combustion engine includes a control pressure circuit which determines the restoring force on the movable member of the fuel metering valve. The magnitude of the control pressure, and hence the fuel quantity metered out by the valve assembly can be altered by the intermittent actuation of a pressure relief valve which controls a fluid bypass. The duty cycle of the intermittently acting bypass valve is controlled by a regulating device which responds to the indications of measuring transducers, for example an oxygen probe located in the exhaust line of the engine. The transducer signal is superimposed on a sawtooth voltage at the input of a differential amplifier which interacts with other control circuitry so as to vary the length of time during which the electromagnetic bypass valve is energized.
REFERENCES:
patent: 3796200 (1974-03-01), Knapp
patent: 3827237 (1974-08-01), Linden et al.
patent: 3868819 (1975-03-01), Knapp
patent: 3874171 (1975-04-01), Schmidt et al.
Devinsky Paul
Greigg Edwin E.
Myhre Charles J.
Robert Bosch G.m.b.H.
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