The piston must fit tightly with the cylinder wall，Inserting a piston ring into the piston is exactly the measure taken to address this problem. Piston ring has gas ring and oil ring, The former prevents combustion mixtures from penetrating into the crankcase, the latter prevents alloy cast iron from being made, Open mouth, Flexible, when put on the piston, It has the characteristics of tightly abutting against the cylinder wall. Leakage if seal is broken, The engine loses some power, Increased fuel and oil losses, Severe carbon deposits on piston and combustion chamber surfaces, And cause environmental pollution.
2 to 3 air rings are usually installed on the piston, 1 to 2 oil rings, Under the requirement of ensuring the seal, The number of rings should be minimized. Although there are several air rings, the requirements for each ring are not the same. Closest to the top is the first air ring, Since it is close to the combustion chamber, Work under the highest temperature and pressure and the most difficult lubrication conditions, So its working surface is usually plated with porous chromium, This not only improves the surface hardness, Can store a small amount of oil to improve lubrication conditions, Increase service life. The other gas rings are usually only tinned or phosphate. Due to the high working temperature of the first air ring, It also has a large incision gap. When each piston ring is mounted on the piston, Their respective cuts must be staggered, This is helpful for the sealing of the cylinder.
Welcome to contact us www.hdpiston.com
piston ring manufacturer supplier cylinder truck parts engine auto automotive china spare