| 摘要 |
PURPOSE:To prevent a hunting phenomenon or valve opening at unnecessary time, by simultaneously opening and closing an opening, communicated to an intake passage in th upstream side of a throttle valve, and an opening, communicated to the intake passage in the downstream side of the throttle valve, with a valve body. CONSTITUTION:The first passage 31, communicated to an intake passage 2 in the upstream side of a throttle valve 5, and the second passage 32, communicated to the intake passage 2 in the downstream side of the throttle valve 5, are opened to an equal level in the same internal wall of a valve chamber 34, formed in a main unit 33A of a first idle air control valve 33, and an orifice 35, metering a suction air amount enough for preventing a decrease of idle speed at operation of auxiliary equipments, is interposed in the second passage 32. Then said openings are press contacted to an equal level and the both openings can be simultaneously closed through a rubber sheet 36a of a valve body 36 secured to a diaphragm 15. |
