| 摘要 |
PURPOSE: Structure for operating a waste gate valve is provided to prevent wear of a bush rotating and supporting the waste gate valve, and to improve the durability of a turbocharger by installing an additional check valve in the middle of an air line connecting a solenoid valve and an actuator. CONSTITUTION: Pneumatic pressure from an air compressor is decompressed through a regulator, and supplied to an actuator(16) to open and close a waste gate according to operation of a solenoid valve(17). In a turbocharger of a CNG(Compressed Natural Gas) engine for controlling boost pressure of a compressor, the solenoid valve regulates pneumatic pressure supplied to the actuator. A check valve(30) is formed in an air line connecting the actuator and the solenoid valve to close a waste gate valve(20) slowly in shutting the solenoid valve. The check valve includes an inlet, an outlet, a body, a ball elastically supported in a chamber between the inlet and the outlet by a spring, and a valve seat opened and closed by the ball.
|
