Bitzer 4TC piston supplier tells you: the piston ring installed on the engine piston is divided into two types: air ring and oil ring. The gas ring is located on the upper part of the piston, and each piston of the engine is equipped with 2 to 3 gas rings to seal the combustion chamber and prevent high-temperature gas from leaking, resulting in insufficient compression pressure of the engine due to gas leakage. The oil ring plays the role of oil distribution and oil scraping, which not only lubricates the surface of the cylinder, but also prevents the oil from entering the combustion chamber.

     When the engine is working, if the crankcase is filled with oil, there will be a lot of smoky hot gas discharged, and at the same time, the engine exhaust pipe will emit blue or black smoke. For a multi-cylinder diesel engine, the engine runs at a medium speed, disconnect the high-pressure oil circuit of one cylinder, and stop the fuel supply to this cylinder. Observe the reduction or disappearance of the smoke from the crankcase vent and the oil filling port, and the blue smoke and black smoke from the exhaust pipe, indicating that the cylinder has gas and oil leakage, and the piston ring has worn out and failed.
     Bitzer 4TC piston supplier will introduce to you: the wear parts of the piston ring are the outer circular surface and the upper and lower end faces. The oil ring and the first air ring are the most severely worn. After the piston ring is worn out, it will not be repaired, but all or part of it will be replaced with a new one. , to restore the matching relationship with the cylinder liner and piston. In order to ensure the quality, the old rings that continue to be used (during maintenance, the old rings with a well-run-in surface can be transferred to the first and second use, and the new rings can be transferred to the lower ring groove to reduce the wear and tear of the cylinder liner. wear) and replaced new rings, the size class should be the same as the cylinder liner piston repair size class, and the end clearance, side clearance, elasticity and roundness should meet the requirements.