How to Adjust a Turbo Bypass Valve?

[LaBarrett]

Turbo bypass valve adjustment method: The most common approach is to adjust the position of the valve stem nut. First, remove the rubber hose on the valve body, then use other equipment to apply a rated pressure for adjustment. The turbo bypass valve mechanically regulates the speed of the turbocharger to reduce boost pressure. The working principle of the turbo bypass valve is as follows: The right side of the diaphragm in the bypass valve is connected to the boost pressure Pk. When Pk exceeds the specified value, Pk lifts the diaphragm of the relief valve, causing the bypass valve to open immediately. As a result, a portion of the exhaust gas bypasses the turbocharger and is directly discharged into the atmosphere, reducing the flow rate at the turbine inlet, lowering the pressure PT, decreasing the turbocharger speed, and bringing the compressor outlet pressure Pk below the specified value. The bypass valve then closes, thereby overcoming the phenomenon of excessive Pk boost pressure.