Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1993-01-08
1993-10-05
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
1231883, 1231974, 1231935, 1231936, 428408, 428446, 428698, 428469, F01L 114, F01L 300
Patent
active
052495540
ABSTRACT:
A powertrain component (10) for use in an internal combustion engine, the powertrain component comprising a coating system including a film (30) selected from the group consisting of amorphous hydrogenated carbon, silicon-doped amorphous hydrogenated carbon, boron-, nitrogen-, boron nitride-, or metal-doped amorphous hydrogenated carbon, and mixtures thereof. The film (30) is formed on the powertrain component (10), and imparts the characteristics of low friction and wear resistance to the component. The powertrain component (10) also includes an interlayer (42) formed between the film and the component. The interlayer (42) accommodates stresses engendered by formation of the film (30), and thereby improves adherence of the film (30) to the substrate (10). To enable engineering of desired surface properties, the film (30), the interlayer (42), or both may be provided with a graded composition.
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Gangopadhyay Arup K.
Tamor Michael A.
Vassell William C.
Willermet Pierre A.
Ford Motor Company
Lo Weilun
Malleck Joseph W.
May Roger L.
Wolfe Willis R.
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