Patent ID: 7383814
Filing Date: 2008-06-10
Classification: F02D,F02M

Abstract:
1. A multicylinder engine intake system comprising: a plurality of throttle bodies having intake paths communicating with intake ports of a multicylinder engine, and throttle valves for opening and closing the intake paths; a plurality of bypasses provided in the throttle bodies, having upstream ends opened to atmosphere or the intake paths on upstream sides of the throttle valves, and having downstream ends opened to the intake paths on downstream sides of the throttle valves; and a common bypass control valve which opens and closes the bypasses, wherein the plurality of bypasses on the upstream side of the bypass control valve comprise a single common bypass upstream path; among bypass downstream paths, on the downstream side of the bypass control valve, of the plurality of bypasses, the bypass downstream paths on the side of the throttle body on which the bypass control valve is mounted are formed in the same throttle body; some of other bypass downstream paths comprise communication pipes which provide connections between the bypass control valve and the other throttle bodies.