Friction Modelling for Internal Combustion Engines

A friction model of the internal combustion engine has been developed which takes account of the three major tribological components contributing to power loss; the engine bearings, the valve train and the piston assembly. All these components have been analysed in detail in earlier and separate studies, but this initial approach to the synthesis of procedures for friction and power loss prediction in complete engines enables the influence of engine design changes and the selection of alternative lubricants or lubricant modifiers to be assessed. The authors believe that the lubricant should be considered as an engineering material in the engine and component design process.

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