| 摘要 |
PURPOSE:To prevent the engine stop at an abnormal time by driving a diaphragm type actuator for opening and closing a throttle valve by intake negative pressure or atmospheric pressure switched by a pressure switching device, and controlling the pressure switching device according to engine rotating speed and water temperature. CONSTITUTION:A bypass passage 33 is connected to an inlet passage 30 in such a manner as to bypass a throttle valve 32, and on its air inlet port side 34, an actuator 35 for controlling the idle air quantity in which the opening of the air inlet port 34 is regulated by a solenoid valve 38 is disposed. The throttle valve 32 is constituted in such a manner as to be opened and closed through a throttle lever 45 by a diaphragm type throttle opener 40 generating an output corresponding to a pressure signal (intake negative pressure or atmospheric pressure) through a pressure switching device 50 including a solenoid valve 53. Each solenoid valve 38, 53 is controlled by ECU 36, based on the outputs of an engine speed detecting means and a water temperature detecting means. |
