1990-09-01

A Process to Predict Friction in an Automotive Valve Train 901728

A study was conducted using a combination of elastohydrodynamic lubrication (EHD) theory, classical boundary and hydrodynamic lubrication principles, and empirical relationships to characterize the mechanical losses from gasoline engine valve trains. The result was a comprehensive analytical methodology that serves as an excellent design tool when determining a first approximation of valve train friction.

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