Cylinder block

The main body of the engine, which integrates the individual cylinders and the crankcase, is the support frame for the piston, crankshaft and other parts and accessories.

Cooling method

In order to ensure that the cylinder surface can work normally at high temperatures, the cylinder and cylinder head must be cooled at any time. There are two cooling methods: one with cooling liquid (water cooling) and the other with air cooling (air cooling).

More water is used on the car engine. When the engine is cooled by water, there is a cavity filled with coolant in the cylinder and in the cylinder head, called the water jacket, and the water jacket on the cylinder block and the cylinder head are connected to each other.

When the engine is cooled by air, a number of fins are cast on the outer surface of the cylinder block and the cylinder head to increase the heat dissipation area and ensure sufficient heat dissipation. Generally, the cylinder of the air-cooled engine is separately cast from the crankcase.

Cylinder head

The function of the cylinder head is to seal the cylinder, which together with the piston forms a combustion space and is subjected to the action of high temperature and high pressure gas. The cylinder head is subjected to mechanical forces and mechanical loads caused by the tightening of the cylinder bolts, and is also subjected to high thermal loads due to contact with high temperature gas. In order to ensure a good seal of the cylinder, the cylinder head can neither be damaged nor deformed. To this end, the cylinder head should have sufficient strength and rigidity.

Cylinder head Working Condition

The function of the cylinder head is to seal the gas, form a combustion space together with the piston, and withstand the action of high temperature and high pressure gas. The working condition of the cylinder head is:

(1) The cylinder head is subjected to high temperature and high pressure gas, and it is subjected to a large bolt preload, resulting in large mechanical stress.

(2) The structure of the cylinder head is complicated, the temperature field is seriously uneven, resulting in large thermal stress. In severe cases, the cylinder head may be cracked and deformed.

Therefore, the design requirements for the cylinder head are

(1) It has sufficient rigidity and strength, and the work deformation is small to ensure sealing.

(2) Reasonably arrange the combustion chamber, valve and air passage to ensure the working performance of the engine.

(3) The process is good, the temperature field is as uniform as possible, the thermal stress is reduced, and the thermal cracking phenomenon is avoided.

The engine parts brand that we have as following:

Cummins, Perkins, Mitsubishi, Caterpillar,VOLVO, Komatsu,Isuzu, Yanmar,Hitachi, DEUTZ, Yuchai, Shangchai, Weichai and so on.