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Four Functions Of Piston Ring

Piston ring is widely used in various power machines, such as the steam engine, diesel engine, gasoline engine, compressor, hydraulic machine and so on. And it mainly has four functions including sealing effect, adjusting the oil, heat conduction, and supporting.

Sealing refers to sealing the gas, in order to prevent the leakage of gas from combustion chamber into the crankcase, control the amount of gas leakage to a minimum, and improve thermal efficiency. Because leakage of the gas will not only make the engine power decline, but also lead to the oil deterioration.

Adjusting oil is to scrape the surplus lubricating oil on cylinder wall, and at the same time to make a thin oil film so as to guarantee normal lubrication of cylinder, piston and piston ring. In modern high speed engine, special attention has been paid to the effect of controlling of oil film of piston ring.

The heat conduction is to conduct the heat from the piston to the cylinder sleeve through the piston ring, that is, to receive the cooling effect by the piston ring.

The supporting role means that the piston ring keeps the piston remaining in the cylinder, which can prevent direct contact between the piston and the cylinder wall, ensuring the smooth movement of the piston, reducing the friction resistance, and preventing the piston knocking cylinder.


WUXI SHENG YI TURBO is a professional enterprise producing turbocharger and motorcycle parts. We adopt vanguard technology positively from home and abroad, and have established the long-term technical cooperation with many well-known enterprises. We have passed ISO9001:2000 in September, 2004.

Now we own the floor space 5800 square meters. There are more than 50 workers including more than 10 technical staff who has the senior or intermediate title and more than 30 first-line workers who have rich experience in turbocharger. We have independent import and export rights, over the years, the products of SHENG YI have been sold well at home and abroad and also get the widespread recognition and praise with our honest work style, excellent quality and competitive prices. At the same time, company is committed to R & D of the new product, we can produce the turbocharger according to customer’s sample or mechanical drawings.