Title: Intake system for an internal combustion engine

Abstract: In an internal combustion engine having at least two separated combustion chambers and at least two separated intake passages respectively connected with said combustion chambers, a communicating passage is provided between the intake passages and shut-off valve means is provided in the intake passages except one intake passage. The shut-off valve means is closed during engine starting and warming up period so that intake air is introduced only through said one intake passage whereby intake flow speed is increased to improve atomization of fuel.

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Inventors: Hirose, Yutaka (Hiroshima, JA)
Isomura, Sadao (Hiroshima, JA)

Application Number: 486823
Filing Date: 1974-07-09
Publication_date: 1976-03-16
Assignee: Toyo Kogyo Co., Ltd. (JA)
Primary Class(es): 123/179.16 123/575, 261/23.2, 261/39.5, 261/41.3
Other Classes:
US Patent Ref:

2053094	Sep, 1936	Markham	123/179.
2193533	Mar, 1940	Kishline et al.	261/23.
2323442	Jul, 1943	Beard	123/127.
3205879	Sep, 1965	Von Seggern et al.	123/127.
3608533	Sep, 1971	Mennesson	123/179.

Other Refs: 1,125,96627,571

Nov, 1956	FR
Jul, 1924	FR

Primary Examiner: Myhre, Charles J.
Assistant Examiner: Liles, James D.
Attorney: Fleit & Jacobson