Patent ID: 7267099
Filing Date: 2007-09-11
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 bypass control valve is mounted on any of the plurality of throttle bodies; downstream ends of the bypasses opened in the throttle bodies are formed as throttle holes; and the diameter of the throttle hole on a side of the throttle body on which the bypass control valve is mounted is smaller than diameters of the throttle holes on other throttle bodies.