Patent ID: 6418900
Filing Date: 2002-07-16
Classification: F02B,Y02T

Abstract:
An air induction system for a multi-cylinder engine, comprising:a plurality of independent air intake passages in communication with respective cylinders of the engine for supplying induction air thereto; a surge tank connected to the independent air intake passages for supplying the induction air to the air intake passages; an air induction passage having first and second branch passages each exposed to the atmosphere at one end thereof and connected to the surge tank at another end thereof for inducing the induction air into the surge tank; a volumetric chamber disposed between the branch passages; a first switching valve disposed in the surge tank for selectively interrupting and establishing fluid communication between first and second sections the surge tank; a second switching valve separating the volumetric chamber from the first and second branch passages for selectively interrupting and establishing fluid communication between the volumetric chamber and the first and second branch passages; and a drive mechanism common to the first and second switching valves for operating the first and second switching valves in response to the magnitude of engine speed.