The influence of the thermal state of lubricating oil for friction in combustion engine

Abstract

The results resistance of loss motion diesel engine for different temperatures of lubricating oil is presented in the paper. Tests were performed to evaluate the effect of lubricating oil temperature of friction losses in engine. In addition to friction losses in the bearings of the crankshaft and a group of piston ringspistoncylinder, the friction loss due to charge exchange in the cylinder drive system and oil pump were measured also. The research results shows the progress resistance of loss motion engine.

The impact of microgeometry pistons with a stepped bearing surface for the friction loss of the internal combustion engine

“…7. A detailed description of the position of the model is in the literature [18][19]. Wing type product of ZF, driven by an electric motor with a power of 0,4 kW Coolant pump…”

Test bench measurement of friction loss in combustion engine

“…Reducing friction losses has the effect of decreasing fuel consumption and increasing mechanical efficiency [1,7]. One of the friction loss reduction method is the use of lubricating oils with reduced viscosity [3,7]. This solution has a certain limitation.…”

“…Engine block coolant temperature determines the temperature of the cylinder and wall oil film covering the cylinder wall. It has a significant impact on the processes of friction occuring in the main engine friction nodes [5,7]. Besides the node-piston rings and cylinder to total engine friction losses compared to the main part of the bearing and make the crank shaft of the engine.…”