FRICTION LOSSES AT CRANK MECHANISM BEARINGS OF A DIESEL ENGINE

Anna Krzymień
unpublished
From the point of user it is important to minimize engine friction losses because it means the reduction in fuel consumption and emissions. Among all losses encountered during energy transformation a significant part relate to the friction in crank mechanism, in particular in bearing nodes. This paper presents results of calculation of averaged friction losses generated at the main and crank bearings of a diesel operating in a wide range of rotational speeds. A main bearing served as an example
more » ... erved as an example for demonstration of utilization of obtained results to an analysis of friction losses from the perspective of their relation against engine certain constructional (dimensions, clearances, lubricating oil viscosity) and operational (speed, load, oil properties) parameters. Total power required for overcoming friction resistance at main and crank bearings has been presented in relation to the variable rotational speed.
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