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The internal structure of the engine

2023-06-01

 The modern automobile engine block group is mainly composed of the body, cylinder head, cylinder head cover, cylinder liner, main bearing cover and oil pan. The engine body assembly is the bracket of the engine, which is the assembly matrix of the crank connecting rod mechanism, valve distribution mechanism, and main components of the engine system. The cylinder head is used to seal the top of the cylinder and form a combustion chamber together with the piston crown and cylinder wall.

The cylinder head is used to seal the cylinder and form the combustion chamber. The cylinder head is cast with water jacket, inlet hole, outlet hole, spark plug hole, bolt hole, combustion chamber, etc.

The cylinder block is the main body of the engine, connecting each cylinder and the crankcase as a whole. It is the supporting framework for installing pistons, crankshafts, and other parts and accessories.

The cylinder gasket is located between the cylinder head and cylinder block, and its function is to fill the micro pores between the cylinder block and cylinder head, ensuring good sealing at the joint surface, thereby ensuring the sealing of the combustion chamber and preventing cylinder leakage and water jacket leakage.

The piston connecting rod group is the transmission component of the engine, which transmits the pressure of combustion gas to the crankshaft, causing it to rotate and output power. The piston connecting rod group is mainly composed of piston, piston ring, piston pin and connecting rod.

The main function of the piston is to withstand the pressure of combustion gas and transmit this force to the connecting rod through the piston pin to drive the crankshaft to rotate. In addition, the top of the piston, cylinder head, and cylinder wall together form a combustion chamber. The piston is the most severe component in an engine under operating conditions, with gas and reciprocating inertia forces acting on it.

The function of the crankshaft is to convert the gas force transmitted by the piston and connecting rod into torque, which is used to drive the transmission system of the car, the valve distribution mechanism of the engine, and other auxiliary devices. The crankshaft operates under the combined action of periodic changes in gas force, inertia force, and torque, and bears alternating bending and torsion loads.