Powertrain component with amorphous hydrogenated carbon film
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United States of America Patent
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Aug 24, 1993
Grant Date -
N/A
app pub date -
Jan 8, 1993
filing date -
Jan 8, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A powertrain component such as a valve lifter (10) for use in an internal combustion engine (12), the valve lifter (10) being positioned between a cam (14) and a valve stem (16). An amorphous hydrogenated carbon film (28) is formed on the component, the film (28) imparting the characteristics of low friction and wear resistance. Also disclosed is an interlayer which improves adherence by imparting the properties of improved absorption of mechanical stresses and chemical compatibility between the film (28) and the substrate (10). Methods for forming the film (28) and interlayer are also disclosed.
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