What causes the piston ring of an off-road forklift engine to break?

Ordinary forklift chassis is low, usually can only work on flat road sections, using rear-wheel drive, ordinary tires are small, and grip is average. Off-road forklifts, however, are all four-wheel drive, with a higher chassis than ordinary forklifts, offering good passability on potholed sections and preventing the chassis from being scraped. Off-road forklifts are larger in size and equipped with high-horsepower engines, providing strong power. When working on rugged roads such as mountain roads and muddy roads, off-road tires have strong grip and are not easy to slip. 1. Too small end gap: During installation, if the end gap is too small, when the piston ring temperature of the off-road forklift rises, the metal at the end gap will expand, and the two ends will butt against each other and bend, thereby breaking near the end gap. 2. Carbon deposit in the ring groove: Overheating of the cylinder wall causes the lubricating oil to oxidize or burn, both of which will cause severe carbon deposit in the cylinder, thereby obstructing the movement of the piston ring; over time, the piston ring will undergo bending fatigue and break. 3. Excessive wear of the ring groove: When the lower end face of the ring groove is severely worn, it will take on a trumpet shape. When the piston is near top dead center, the action of combustion gas pressure makes the piston ring press tightly against the inclined lower end face of the ring groove, thereby undergoing torsional deformation. 4. The piston ring catches on the port: Because the tension at the opening of the piston ring is relatively large and thermal deformation is relatively great, the ribs between the ports on the cylinder liner are prone to deformation when heated. When the piston moves, the ring meets the port, and if the ring opening is slightly caught at the port, the ring will break.