Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Patent
1988-04-12
1989-10-24
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
123315, 60324, F02M 2506, F01L 126, F02B 7540
Patent
active
048754552
ABSTRACT:
An exhaust gas recirculating system for a combustion engine has at least one cylinder communicating with a source of combustible air-fuel mixture through at least one intake port adapted to be selectively closed and opened for effecting the interruption and admission of the supply of the combustible mixture into the combustion chamber, the cylinder also communicating with an exhaust system through first and second exhaust ports both adapted to be selectively opened and closed. The exhaust gas recirculating system includes an intake valve for selectively opening and closing the intake port, first and second exhaust valves each for selectively closing and opening the associated first and second exhaust ports, wherein the first exhaust valve is operable to completely close the associated first exhaust port subsequent to the complete closure of the second exhaust port by the associated second exhaust valve, an exhaust shutter valve for selectively opening and closing a passage extending between the first exhaust port and the exhaust system, and a control unit for controlling the shutter valve according to an engine operating condition to adjust the amount of a portion of the exhaust gases allowed to substantially remain within the cylinder.
REFERENCES:
patent: 3166057 (1965-01-01), Konrad et al.
patent: 3941113 (1976-03-01), Baguelin
patent: 4426986 (1984-01-01), Muller et al.
patent: 4651684 (1987-03-01), Masuda et al.
patent: 4690110 (1987-09-01), Nishimura et al.
Hashimoto Noboru
Hitomi Mitsuo
Hotate Makoto
Nobumoto Hidetoshi
Onishi Koji
Mazda Motor Corporation
Wolfe Willis R.
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