10PC1T 12PC1T Diesel Engine Cylinder Liner 1-11261-076-0 1-11561-111-0 For ISUZU

Causes and Prevention

Diesel engine cylinder pulling refers to the phenomenon of excessive wear, burrs, scratches, scratches, cracks, or bites on the working surface caused by the intense interaction between the piston components and the cylinder mating working surface (caused by friction). Cylinder pulling is the adhesive wear to varying degrees under lubrication conditions. When cylinder pulling is light, it causes damage to the cylinder liner and piston components, and in severe cases, it can cause a vicious engine damage accident of cylinder biting. When pulling the piston or connecting rod, it can damage the machine, Therefore, it is of great significance to analyze the formation mechanism of the diesel engine cylinder pulling fault, find out the early prediction and correct countermeasures, correctly manage and use the diesel engine, improve the reliability and extend the service life, and improve the management personnel's strain energy for troubleshooting. Reasonable use and attention to maintenance (regular inspection) can also reduce the diesel engine cylinder pulling fault

1. Cylinder pulling phenomenon:

The mechanism of cylinder pulling damage is mostly due to local damage to the lubricating oil film at the sliding part. At this time, two relatively moving surface protrusions first come into contact with metal, and then a small "melting" phenomenon occurs locally. The melting part is torn apart due to the relative movement of the components. During this process, the metal surface forms a hardened layer, and when the hardened layer is damaged, The metal abrasive particles generated will become the abrasive material that intensifies surface wear. In a short period of time during the so-called "melting wear", uneven wear marks parallel to the centerline of the cylinder appear on the surface of the piston and cylinder liner, which is the phenomenon of cylinder pulling. In severe cases, the sliding parts are completely adhered or stuck, and even cracks may occur in the weak parts of the two surfaces, causing damage to the parts, namely cylinder biting. Therefore, the fundamental cause of cylinder pulling is melting wear.

2. Reasons for cylinder pulling:

The reasons for cylinder pulling are very complex, with design factors such as material selection, determination of gap size, appropriateness of device installation, reasonable structural layout, surface roughness, and perfect lubrication and cooling arrangements. From a management perspective, it may be caused by the following reasons:

(1) Poor cylinder lubrication:

The cylinder is not lubricated enough or the oil supply is interrupted, and the cylinder is pulled due to direct metal contact. The reasons for poor cylinder lubrication include: too little oil in the oil pan or poor oil quality, too high temperature of the diesel engine, or damage or failure of the piston ring (mainly the oil ring).