The cylinder head is mounted on top of the cylinder block, sealing the cylinder from the top and forming the combustion chamber. It is often in contact with high temperature and high pressure gas, so it bears a large thermal load and mechanical load. A cooling water jacket is made inside the cylinder head of the water-cooled engine, and the cooling water hole at the lower end of the cylinder head is communicated with the cooling water hole of the cylinder body. Circulating water is used to cool high-temperature parts such as the combustion chamber.





