Steel piston with counter-bore design,Steel piston

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Steel piston with counter-bore design

ActiveUS20140076264A1Improve performanceReduce the total massMachines/enginesPistonsEngineeringInternal combustion engine

A piston for an internal combustion engine is provided. The piston includes a piston body which is made of steel. The piston body has a crown portion with an upper combustion surface, a pair of skirts which depend from the crown surface, a pair of pin bosses for receiving a wrist pin and a plurality of pin boss bridges which extend from the pin bosses to the skirts. Each of the pin boss bridges extends axially to a lower end which is opposite of the crown portion and has a rib with an increased thickness at its lower end. At least one of the pin boss bridges has a generally flat counter-bore surface for providing a reference location for machining of the piston body.

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Owner:TENNECO

Steel piston

ActiveUS20210262412A1Improve machinabilityHigh strengthPlungersFurnace typesChemical compositionSulfide compound

An upper member of a steel piston has a chemical composition which consists of, in mass %, C: 0.15 to 0.30%, Si: 0.02 to 1.00%, Mn: 0.20 to 0.80%, P: 0.020% or less, S: 0.028% or less, Cr: 0.80 to 1.50%, Mo: 0.08 to 0.40%, V: 0.10 to 0.40%, Al: 0.005 to 0.060%, N: 0.0150% or less, O: 0.0030% or less, and the balance: Fe and impurities, and satisfies Formula (1) and Formula (2), in which, at a cross section parallel to the axial direction of the upper member, the number of Mn sulfides is 100.0 per mm2 or less, the number of coarse Mn sulfides having an equivalent circular diameter of 3.0 μm or more is within a range of 1.0 to 10.0 per mm2, and the number of oxides is 15.0 per mm2 or less.0.42≤Mo+3V≤1.50 (1)V / Mo≥0.50 (2)

Owner:NIPPON STEEL CORP +1

3 results about "Steel piston" patented technology

Steel piston with counter-bore design

Steel piston

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