Why Is The Micro Exhaust Valve Damaged?

In the process of using the micro exhaust valve, the micro exhaust valve will be damaged, so what is the cause of this situation? Let's take a look together below.

1. Poor combustion will not only increase the exhaust temperature, but also form carbon deposits in the combustion chamber. The increase in exhaust temperature makes the working environment of the exhaust valve worse. When other conditions are added, the combustion loss of the exhaust valve increases.

2. Some carbon deposits in the combustion chamber will be discharged with the exhaust gas, and will stick to the sealing surface of the exhaust valve and valve seat like the above-mentioned particles. In particular, the heating temperature of heavy oil is not well controlled, the viscosity is too high, it is difficult to atomize the fuel injected into the cylinder, and the high pressure oil pump plunger wears and other reasons cause the combustion to regress, which will cause the exhaust valve and the sealing surface of the valve seat to be contaminated by carbon deposits . In addition, after various complicated heat treatments in the combustion chamber, the impurities contained in the fuel are deposited on the surface of the exhaust valve flap and the sealing cone of the valve seat into a layer of glass-like hard and brittle material mixed with carbon particles, including sodium sulfate and calcium sulfate. , Iron oxide and other substances are mixed together.

3. When the deposition thickness of this layer of glassy deposit is too large, cracks will appear under the action of impact force when the valve is closed. After repeated impacts, it will develop into a sheet shape, thereby forming a high-temperature gas jet channel combustion valve.