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1. Toyota, Honda, Suzuki, Dafa and Nissan gasoline engines adopt the first red oxidation steel ring, outer circle chrome plating, the second alloy, NPR shape big wave or Rik wavelet shape combined oil ring, bronze or black, each ring is sprayed with color code (red, yellow and blue) and type T or n, each ring is sprayed with color code (red, yellow and blue)
2. Mitsubishi, Nissan, Toyota, diesel engines adopt the first red oxidation, outer circle chrome plating, middle bright line, second ductile iron, outer chrome plating, taper angle line, third oil ring, nitriding small hole spiral support ring; Each ring spray color code (red, yellow and blue)
3. Isuzu diesel engine adopts the original process, three side plating or four side plating, surface treatment of oil ring and large hole oil ring, and polytetrafluoroethylene process for spring. Type T or N, each ring spray color code (red, yellow and blue)
Piston ring is a metal ring embedded in the piston groove. There are two kinds of piston rings: compression ring and oil ring. The compression ring can be used to seal the combustible gas mixture in the combustion chamber; The oil ring is used to scrape off the excess oil on the cylinder.
Piston ring is a kind of metal elastic ring with large outward expansion deformation. It is assembled into its corresponding annular groove. The reciprocating and rotary piston ring forms a seal between the outer circular surface of the ring and the cylinder and one side of the ring and ring groove depending on the pressure difference of gas or liquid.