Title: Rotary piston engine exhaust gas recycling means

Abstract: Exhaust gas recycling means by which exhaust gas is recycled and introduced, via a port which is formed in the peripheral wall of a rotary piston engine and which port may also serve for introduction of air or an air-fuel mixture required for low-speed operation of the engine, into a leading zone of an intake chamber. Since the port formed in the peripheral wall is so disposed that the air or air-fuel mixture introduced therethrough tend to be stratified at the leading zone of the intake chamber, the recycled exhaust gas also tends to be stratified at the same leading zone so that the recycled exhaust gas tends to exist in vicinity of the spark plug, whereby less exhaust gas is required to be recycled since a given amount of exhaust gas is more effective in preventing production of nitrogen oxides, and there is correspondingly less engine wear and attendant production of hydrocarbons or similar compounds.

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Inventors: Satow, Haruhiko (Hiroshima, JA)

Application Number: 668513
Filing Date: 1976-03-19
Publication_date: 1978-04-18
Assignee: Toyo Kogyo Co., Ltd. (JA)
Primary Class(es): 123/217 60/901
Other Classes:
US Patent Ref:

3507261	Apr, 1970	Myers	60/901.
3780707	Dec, 1973	Cole	123/8.
3791145	Feb, 1974	Yamamoto	123/901.
3795228	Mar, 1974	Shimizu	60/901.
3867910	Feb, 1975	Galonska	123/119.
3905337	Sep, 1975	Shimoji	123/8.
4009689	Mar, 1977	Walters	123/8.

Other Refs:
Primary Examiner: Gordon, Clarence R.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack