Valve guide

The valve guide refers to the connecting pipe between the valve of the internal combustion engine and the cylinder head, and is mainly used to control the opening and closing of the valve. During the working process of the internal combustion engine, the valve guide bears important functions and roles.

First of all, the valve guide is used to guide the work of the intake and exhaust valves. In a four-stroke internal combustion engine, the valve guide and the valves work together to control the opening and closing time of the intake and exhaust valves and the sequence of intake and exhaust. The opening of the intake valve allows the air-fuel mixture to enter the combustion chamber, and the opening of the exhaust valve discharges the burned exhaust gas. The reasonable design and layout of the valve guide can make the intake and exhaust process smoother, and improve the combustion efficiency and output power of the engine.

Secondly, the valve guide also acts as a cooling valve. Because the valve will be affected by high temperature and high pressure during the working process, it needs to be cooled to reduce its working temperature to ensure its normal operation. The valve guide is connected with the cooling water channel, so that the cooling water can flow through the valve guide to take away the heat, thereby reducing the temperature of the valve, reducing the influence of thermal expansion on the valve, and prolonging the service life of the valve.

In addition, the valve guide also has the effect of reducing vibration and noise. When the internal combustion engine is working, the opening and closing of the valve will cause vibration and noise, which will affect the running stability and driving comfort of the engine. By providing a good guide channel, the valve guide can reduce the vibration and noise when the valve moves, and reduce the driver's experience and the working noise of the engine.

Finally, the valve guide also has the effect of reducing fuel consumption and emissions. Through reasonable design and layout, the valve guide can make the process of intake and exhaust more fully, improve combustion efficiency and reduce fuel consumption. At the same time, the valve guide can also help reduce the residue of exhaust gas, improve the quality of exhaust gas, reduce the emission of harmful gases, and have positive significance for environmental protection.

To sum up, valve guides play an important role in internal combustion engines. It is not only used to guide the work of the intake and exhaust valves, but also has multiple functions such as cooling the valves, reducing vibration and noise, reducing fuel consumption and emissions. Therefore, when designing and manufacturing internal combustion engines, it is necessary to pay attention to the design and material selection of valve guides in order to improve the performance and reliability of the engine. At the same time, the maintenance of the valve guide is also very important. Regular inspection and cleaning of the valve guide can prolong its service life and ensure the normal operation of the engine.