Search Results - "McWatt, Douglas G."

Friction, Wear, and Surface Film Formation Characteristics of Diamond-Like Carbon Thin Coating in Valvetrain Application by GANGOPADHYAY, ARUP, SINHA, KAUSTAV, UY, DAIRENE, MCWATT, DOUGLAS G., ZDRODOWSKI, ROBERT J., SIMKO, STEVEN J.

“…The friction and wear characteristics of thin diamond-like carbon (DLC) coatings have been investigated extensively in recent years mostly in laboratory bench…”
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Valvetrain Friction Reduction through Thin Film Coatings and Polishing by Gangopadhyay, Arup, McWatt, Douglas G., Zdrodowski, Robert J., Simko, Steve J., Matera, Steve, Sheffer, Kirk, Furby, Robert S.

“…In a direct-acting mechanical bucket tappet-type valvetrain, the cam and tappet contact is responsible for about 85% of the total valvetrain frictional losses…”
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The Effect of Novel Surface Textures on Tappet Shims on Valvetrain Friction and Wear by Gangopadhyay, Arup, McWatt, Douglas G.

“…In an engine, the valvetrain contributes about 6-10% of the total frictional loss depending on the architecture. The cam and the tappet contact in a direct…”
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