Title: Exhaust gas recirculation means

Abstract: An exhaust gas recirculation device in which exhaust gas from the engine of a vehicle, for example, may be recirculated via two separate lines to portions of a carburetor which are upstream and downstream of a throttle valve, to permit a suitably large amount of exhaust gas to be recirculated when necessary and which includes control means which stops the flow of gas in both lines when the engine is being warmed up, and stops the flow of gas in the upstream recirculation line only when engine load, engine speed, or vehicle speed is high, or when there is a risk of icing in the carburetor, whereby the disadvantages of recirculated exhaust gas during particular engine operating conditions are avoided.

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Inventors: Okitsu, Kingo (Hiroshima, JP)
Asanomi, Koji (Hiroshima, JP)
Harada, Setsuo (Hiroshima, JP)
Takemoto, Yasunori (Hiroshima, JP)

Application Number: 808354
Filing Date: 1977-06-20
Publication_date: 1979-08-14
Assignee: Toyo Kogyo Co., Ltd. (Hiroshima, JP)
Primary Class(es): 123/568.2
Other Classes:
US Patent Ref:

3872845	Mar, 1975	Schultz	123/119.
4041913	Aug, 1977	Nohira	123/119.
4047509	Sep, 1977	Arnund	123/119.

Other Refs:
Primary Examiner: Burns, Wendell E.
Assistant Examiner:
Attorney: Wenderoth, Lind & Ponack