Method of controlling an exhaust gas recirculating valve in an i

Details Method of controlling an exhaust gas recirculating valve in an i Method of controlling an exhaust gas recirculating valve in an i

1984-06-26

1985-09-17

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F02M 2506

Patent

active

045413983

ABSTRACT:
A method of controlling an exhaust gas recirculation quantity in an internal combustion engine. The method is adapted to detect, by means of valve opening detecting means, the actual valve opening of an exhaust gas recirculating valve arranged across an exhaust gas recirculating passageway communicating the exhaust passage of the engine with the intake passage thereof, determine the difference between the detected actual valve opening value and a desired valve opening value calculated in response to operating conditions of the engine, and operate a valve actuator means to close or open the exhaust gas recirculating valve so as to minimize the above difference. When the calculated desired valve opening value exceeds a maximum possible valve opening value, the desired valve opening value is set to the maximum possible valve opening value. Preferably, an absolute value of the above difference is compared with a predetermined value, and when the absolute value has continued to exceed the predetermined value over a predetermined period of time, it is determined that an abnormality has occurred in the valve opening detecting means. Preferably, the above valve actuator means is a pressure responsive type.

REFERENCES:
patent: 4378776 (1983-04-01), Nishimori
patent: 4378777 (1983-04-01), Iida et al.
patent: 4409948 (1983-10-01), Hasegawa et al.
patent: 4428355 (1984-01-01), Yokooku
patent: 4442820 (1984-04-01), Ina et al.
patent: 4448178 (1984-05-01), Yamato et al.

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