What happens if the supercharger bypass valve rod is shortened?
1 Answers
Shortening the supercharger bypass valve rod will increase the turbo pressure. The control methods for the turbocharger wastegate bypass valve are as follows: 1. Solenoid valve + diaphragm spring actuator: The solenoid valve is a three-way valve, with one pipe connected to the compressor outlet, another pipe connected to the compressor inlet after the air filter, and the third pipe connected to the diaphragm spring chamber. By adjusting the pressure inside the diaphragm chamber, the opening of the bypass valve can be controlled. The engine control unit (ECU) controls the three-way solenoid valve, alternately connecting the diaphragm chamber to high-pressure air and atmospheric air, using duty cycle modulation. The pressure inside the diaphragm chamber is not a fixed value; the ECU collects boost pressure and adjusts the duty cycle signal of the solenoid valve based on the feedback value of the boost pressure, thereby controlling the bypass valve opening. 2. Motor-controlled actuator: The ECU sends signals to directly control a DC motor, which drives the lever mechanism of the bypass valve to control its opening. This actuator integrates a bypass valve position sensor, allowing the ECU to monitor the opening of the bypass valve. With the bypass valve position signal, engineers can preset the bypass valve opening for various engine operating conditions and combine it with feedback control of boost pressure, making boost pressure control more flexible, accurate, and responsive.
