To provide a wire for a taper-faced compression ring, which can be provided with a running-in surface (contact surface) uniformly and rapidly in the production process of the taper-faced compression ring, a surface of the wire corresponding to an outer peripheral surface of the ring is provided with adjacent outward inclined first and second tapered portions, the inclination angle θ2 of the second tapered portion being larger than the inclination angle θ1 of the first tapered portion, and an outer end of the second tapered portion being located radially outward than an outer end of the first tapered portion by 0.005-0.05 mm. A long-life taper-faced compression ring with reduced friction and improved fuel efficiency is formed by the above wire, the second tapered portion having a lapped surface located radially outward than an outer end of the first tapered portion by 0.001-0.048 mm.
Taper-faced compression ring and wire therefor
2017-12-26
Patent
Elektronische Ressource
Englisch
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