What is the function of the turbocharger's bypass valve?

[SanRowan]

At high speeds and loads, the turbocharger bypass valve opens, allowing some exhaust gas to directly enter the exhaust pipe through the bypass valve. This releases a portion of the exhaust gas, reducing the turbo speed and thereby controlling the boost pressure. Here is an introduction to the bypass valve turbocharger: 1. There are two control methods for the bypass valve turbocharger: one is mechanical control, commonly used in truck diesel engines; the other is electronic control, typically applied in passenger cars. 2. The mechanical control bypass valve mainly consists of a control chamber, a linkage rod, and the bypass valve. The left side of the diaphragm in the bypass valve actuator is connected to the boosted gas. 3. The opening and closing of the exhaust bypass valve are controlled by the boost pressure control solenoid valve, which is managed by the ECU. The ECU monitors the engine's operating conditions, compares them with preset internal parameters, and accordingly controls the solenoid valve's opening time. This adjusts the opening degree of the exhaust bypass valve, controls the bypass exhaust volume, and precisely regulates the boost pressure.