Piston ring

  • 31-Aug-2010 09:21 EDT


Federal-Mogul offers a two-piece oil ring design for direct-injection gasoline engines previously developed for high-demanding diesel applications. According to the company, the LKZ oil control ring reduces oil consumption by up to 50% and friction by up to 15% compared to the best conventional two-piece oil rings. The LKZ oil ring combines a stepped surface and taper on its contacting edge, which provides a well-defined pressure to the cylinder wall on the downstroke and a significantly lesser effect on the upstroke. The downstroke pressure more effectively returns the oil that lubricates the cylinder to the oil pan, as opposed to allowing oil to enter the combustion chamber where it may create carbon on the spark plug or on the cylinder head and increase oil consumption.

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