1. Cylinder cover working conditions and requirements The cylinder cover is subjected to mechanical loads caused by gas strength and fastening cylinder head bolts, while also being subjected to high thermal loads due to contact with high temperature gas. In order to ensure a good seal of the cylinder, the cylinder cover can not be damaged, nor can it be deformed. For this purpose the cylinder head should have sufficient strength and stiffness.
In order to make the temperature distribution of the cylinder cover as uniform as possible, to avoid the occurrence of thermal cracks between the inlet and exhaust doors, the cylinder cover should be well cooled.
2. Cylinder COVER Material
Cylinder cover is generally cast by high-quality gray cast iron or alloy cast iron, car gasoline engine is mostly used aluminum alloy cylinder head.
3. Cylinder COVER Construction Cylinder caps are box-shaped parts with complex structures. It is machined with inlet and exhaust door seat holes, valve catheter holes, spark plug mounting holes (gasoline engines) or injector mounting holes (diesel engines). The cylinder head is also cast as part of a water sleeve, inlet and exhaust channel, and a combustion chamber or combustion chamber.
If the camshaft is mounted on the cylinder cover, the cylinder cover is also machined with a camshaft bearing hole or camshaft seat and its lubricating oil channel. The cylinder cover of water-cooled engine has 3 kinds of structural forms, monolithic, block type and monomer type. In a multi-cylinder engine, where all cylinders share a cylinder cover, the cylinder cover is called a monolithic cylinder cover, and if each two cylinders is covered with one or three cylinders, the cylinder head is a block cylinder cover, and if each cylinder is covered, it is a monolithic cylinder head. Air-cooled engines are monolithic cylinder heads.