Patent ID: 6415765
Filing Date: 2002-07-09
Classification: F02B,F02D,F02M

Abstract:
A throttle unit for a multiple-cylinder engine, comprising:a plurality of suction passages, said plurality of suction passages being extendable from an air cleaner to respective combustion chambers of the multiple-cylinder engine; a plurality of throttle valves, each of said plurality of throttle valves being disposed in said plurality of suction passages, respectively; and a bypass passage for bypassing said plurality of throttle valves, said bypass passage comprising: an inlet, said inlet being in communication with an upstream side of said plurality of throttle valves; a valve body receiving chamber, said valve body receiving chamber being coaxial with said inlet; a plurality of upstream side branch passages, each of said plurality of upstream side branch passages extending from said valve body receiving chamber; a plurality of downstream side branch passages, each of said downstream side branch passages extending from end portions of said plurality of upstream side branch passages, respectively, each of said downstream side branch passages being in communication with a downstream side of said plurality of throttle valves; and a valve body movably received in said valve body receiving chamber for opening and closing said bypass passage, said valve body being movable in a direction away from said inlet to open said plurality of upstream side branch passages at the same opening quantity when said bypass passage is in an open condition.