Abstract: The bypass valve system of a turbo-charged engine includes a compressor coupled between an air intake and a cylinder. The system also includes a bypass valve coupled in a bypass passage between an intake manifold and the air intake. The bypass valve is configured to selectively open and close the bypass passage in response to a change in pressure downstream of the compressor. A throttle position sensor is configured to generate an electric signal that is proportional to a degree of opening of a throttle valve. Also, an electronic control unit (ECU) is configured to output an activating signal when a sudden closure of the throttle valve is detected based on the electric signal. Finally, a solenoid valve is configured to supply pressure downstream of the compressor to the bypass valve when it receives the activating signal.

Abstract: The bypass valve system of a turbo-charged engine includes a compressor coupled between an air intake and a cylinder. The system also includes a bypass valve coupled in a bypass passage between an intake manifold and the air intake. The bypass valve is configured to selectively open and close the bypass passage in response to a change in pressure downstream of the compressor. A throttle position sensor is configured to generate an electric signal that is proportional to a degree of opening of a throttle valve. Also, an electronic control unit (ECU) is configured to output an activating signal when a sudden closure of the throttle valve is detected based on the electric signal. Finally, a solenoid valve is configured to supply pressure downstream of the compressor to the bypass valve when it receives the activating signal.