Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1978-12-20
1980-07-01
Burns, Wendell E.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
F02M 2506
Patent
active
042101123
ABSTRACT:
An exhaust gas recirculation (EGR) system comprises a vacuum operated EGR control valve, a differential pressure modulator to produce a control negative pressure for operating the control valve by modulating engine intake vacuum with air, sensors to sense certain parameters of the engine operating condition and an electronic controller which memorizes an optimum control pattern with respect to engine operating conditions to provide a control signal representing an optimum EGR rate to an electromagnetic valve, which regulates the magnitude of a signal negative pressure to be applied to the pressure modulator, so that EGR can be effected exactly at an optimum rate under every operating condition of the engine.
REFERENCES:
patent: 4071003 (1978-01-01), Aono
patent: 4114577 (1978-09-01), Aoyama
patent: 4137874 (1979-02-01), Otsubo et al.
patent: 4142495 (1979-03-01), Lahiff
patent: 4147143 (1979-04-01), Harada
patent: 4161929 (1979-07-01), Nohira et al.
patent: 4164032 (1979-08-01), Nohira et al.
patent: 4165722 (1979-08-01), Aoyama
patent: 4168683 (1979-09-01), Hata et al.
Nagaishi Hastuo
Nakamura Koyo
Burns Wendell E.
Nissan Motor Company Limited
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