Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1987-04-16
1988-09-27
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
123569, F02M 2506
Patent
active
047733799
ABSTRACT:
An apparatus for controlling the exhaust-gas recirculation cycling of an engine includes an exhaust-gas recirculation passage connected at one end to an intake passage and at the other end to an exhaust passage. An exhaust-gas recirculation valve is provided in the recirculation passage to open and close it. The valve is coupled to an actuator having a pressure chamber and moved in accordance with the pressure within the chamber. The chamber communicates with first and second pressure sources through a solenoid valve. In order to move the recirculation valve to a desired position from the present position, the solenoid valve is controlled by a control device such that the first and second pressure sources are alternately connected to the pressure chamber when the distance between the present and desired positions is small, and such that the first or second pressure source is continuously connected to the pressure chamber when the distance between the present and desired positions is large.
REFERENCES:
patent: 4325347 (1982-04-01), Yamaguchi
patent: 4378776 (1983-04-01), Nishimori
patent: 4428355 (1984-01-01), Yokooku
patent: 4448177 (1984-05-01), Hasegawa et al.
patent: 4528968 (1985-07-01), Otobe
patent: 4534334 (1985-08-01), Murakami et al.
Demizu Akira
Hashimoto Mitsuo
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
Wolfe Willis R.
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