The exhaust valve of an automobile engine is one of the key components in the engine. Its function is to control the in and out of the exhaust air flow and ensure the normal operation of the engine. During the working process of the automobile engine, after the gas combustion in the cylinder is completed, the exhaust gas needs to be discharged through the exhaust valve, and at the same time fresh gas enters the cylinder to maintain the normal working rhythm of the engine.

The function of the exhaust valve mainly includes the following aspects:

1. Control the gas in and out of the cylinder: The exhaust valve can control the exhaust gas emission in the cylinder, ensure the smooth exhaust of the exhaust gas, and avoid the residual gas from interfering with the engine operation. At the same time, the exhaust valve can also control the fresh gas into the cylinder to ensure the normal combustion process of the engine.

2. Adjust the pressure in the cylinder: The exhaust valve can adjust the air pressure in the cylinder according to changes in engine speed and load to ensure smooth gas entry and exit. By reasonably controlling the opening and closing time and angle of the exhaust valve, the output power and fuel efficiency of the engine can be effectively improved.

3. Reduce the pollution of exhaust gas to the environment: The normal operation of the exhaust valve can effectively reduce the emission of exhaust gas and reduce the pollution to the environment. Modern automobile engines are usually equipped with exhaust purification devices. Through the control of the exhaust valve, it can better cooperate with the work of the purification device and reduce harmful gas emissions.

In general, the exhaust valve is a very important part of the automobile engine, which directly affects the working efficiency and environmental protection of the engine. A normally working exhaust valve can improve the performance of the engine, extend its service life, and reduce environmental pollution. Therefore, in the process of car maintenance and maintenance, the inspection and adjustment of the exhaust valve is also a very important task.