What is the function of the bypass valve on the turbocharger?

The bypass valve connects the coarse filter and the fine filter to remove excess impurities. In addition, the bypass valve can prevent engine oil from entering the fuel system, thus ensuring the normal lubrication of the whole engine.

Bypass valve is the most common pressure relief device in turbocharging system, which is also commonly known as linkage exhaust pressure relief valve. The built-in exhaust bypass valve is directly installed on the turbine, and the connecting rod is used to control the valve in the exhaust of the turbine. Once the pressurization value at the compressed air end of the turbine reaches the set level, the intake pressure will push the connecting rod with the built-in exhaust bypass valve.

The bypass valve on the exhaust side of the turbine is opened, and part of the exhaust gas is directly discharged to the exhaust pipe without passing through the turbine impeller. In this way, the flow rate of exhaust gas blown to the turbine impeller is reduced, and the rotation speed of the turbine impeller is reduced, and at the same time, the rotation speed of the compressor impeller is reduced. Therefore, the built-in exhaust bypass valve is not only a device to limit the maximum speed of the turbine, but also a device to keep the boost pressure at the inlet of the turbine at a stable value (that is, it will not be too high for a long time).

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Performance characteristics of bypass valve:

The advantage of the bypass valve is that it does not need external power, and works by the pressure of the system itself, which effectively improves the operating safety factor, is safer and more reliable than the traditional electric differential pressure control valve, and solves the probability that the electric differential pressure control valve relies on electricity and circuit problems to cause unit damage. In addition, the invention is convenient to install and saves cost.

Self-operated self-operated differential pressure control valve is used for protection of cold (heat) source units. Installed on the bypass pipe between the water collector and the water separator, when the user runs partially or with variable capacity, the system flow decreases, resulting in an increase in pressure difference. When the pressure difference exceeds the set value, the valve will automatically open and part of the flow will pass, ensuring that the unit flow is not less than the limit.

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