Title: Internal combustion engine having a dual induction type intake system

Abstract: Internal combustion engine having an intake port formed in cylinder head and first and second intake passages both connected with the intake port. The intake passages are respectively provided with throttle valves and the throttle valve in the second intake passage is opened only under a heavy load operation. The ignition timing is advanced or an additional supply of fuel is provided in the transient period wherein the throttle valve in the first intake passage has reached substantially fully open position and the throttle valve in the second intake passage has started to open so as to supplement any decrease in the engine output in this period.

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Inventors: Asanomi, Koji (Hiroshima, JP)
Takemoto, Yasunori (Hiroshima, JP)
Kobayashi, Kazuo (Hiroshima, JP)

Application Number: 857515
Filing Date: 1977-12-05
Publication_date: 1979-08-14
Assignee: Toyo Kogyo Co., Ltd. (Hiroshima, JP)
Primary Class(es): 123/406.73 123/184.52
Other Classes:
US Patent Ref:

2621911	Dec, 1952	Lindsteadt	261/41.
3353524	Nov, 1967	Sarto	123/117.
3408992	Nov, 1968	Von Seggern et al.	123/75.
3418981	Dec, 1968	Von Seggern et al.	123/75.
3554173	Jan, 1971	Masaki et al.	123/119.
3561410	Feb, 1971	Soeters	123/117.
3678905	Jul, 1972	Diehl	123/52.
3704702	Dec, 1972	Aono	123/179.
3788291	Jan, 1974	Wu	123/117.
3852379	Dec, 1974	Shishido et al.	123/32.

Other Refs:
Primary Examiner: Geoghegan, Edgar W.
Assistant Examiner:
Attorney: Fleit & Jacobson