1. The engine head
In the above cylinder head is mounted, and the upper seal cylinder defining the combustion chamber. It is often in contact with high pressure gas, thus subjected to high thermal and mechanical loads. The cylinder head is made of water-cooled engine with a cooling water jacket, cooling water hole and a cooling water hole of a cylinder head in communication with the end face. Use of recycled water to cool the high temperature portion of the combustion chamber and the like.
The cylinder head is generally gray cast iron or alloy cast using cast, good thermal conductivity of aluminum, help to improve the compression ratio, the aluminum cylinder head is adopted in recent years more and more.
further provided with a cylinder head intake and exhaust valve seat, valve guide holes for mounting intake and exhaust valves, and intake and exhaust passages and the like. Gasoline engine cylinder head machined with the spark plug mounting hole, and machining the cylinder head of the diesel engine injector mounting hole. The overhead camshaft engine cylinder head is also machined with camshaft bearing bore for mounting the camshaft.
is an integral part of the cylinder head of the combustion chamber, combustion chamber shape greatly influence the work of the engine, due to the different combustion gasoline and diesel engines, the cylinder head portion of a larger difference in composition of the combustion chamber. Gasoline main combustion chamber in the cylinder head, a combustion chamber of the diesel engine and the main pits top of the piston.