Cover Ass’y,Cylinder Head

The main function of the cylinder head assembly in an excavator engine is to seal the cylinder holes of the engine block and, together with the cylinder liners, form the combustion chamber.

The cylinder head is a critical component of the engine, featuring numerous passages, including water passages, oil passages, and air passages. The water passages are responsible for distributing coolant to each cylinder, playing a cooling role; the oil passages serve as the primary channels for lubricating the upper components of the engine; and the air passages include intake and exhaust ports for the entry of fuel and the exit of exhaust gases.

During the design and manufacturing of the cylinder head, it is essential to distribute these passages effectively, pay attention to stress concentration, and perform aging treatment to withstand the enormous recoil forces generated during the piston’s power stroke. Therefore, the condition of the cylinder head assembly directly affects the engine’s performance and longevity. Proper maintenance and monitoring of the cylinder head are crucial to ensure the overall efficiency and durability of the excavator engine.