Used for sealing and cylinder combustion. Lateral valve type engine cylinder head, with water, into the hole, ChuShuiKong, spark plug hole, bolt hole, combustion, etc. Valve type engine cylinder head, besides cooling jacket, intake and exhaust valve devices, such as. The cylinder cylinder combustion in effect to belong to the main cylinder is closed, the combustion chamber. And as the camshaft and axial and radial support. The main pipe into the air cylinder is internal, the spark plug into explosive mixture of gases, piston, lit from the exhaust gas from work.