Intake vacuum control device for internal combustion engine

摘要

An internal combustion engine is provided with an intake vacuum control device through which the upstream and downstream sides of an intake passageway with respect to a throttle valve are communicable with each other, so that additional air is supplied to the intake passageway downstream of the throttle valve during engine deceleration. The intake vacuum control device is composed of a valve member which is normally biased to be closed by a coil spring which is guided by a cylindrical guide member.