Temperature analysis of oxide coating of aluminum alloy piston used in diesel engine

Abstract

The task of increasing in the efficiency (lowering of fuel consumption) of diesel engines is considered. The distribution of temperatures and stresses on the surface of oxide-coated piston coated by galvanic plasma modification is analized. The basic equations are obtained using the finite element method and solved using the ANSYS Workbench 18.1 and Solidworks 17. It is found thatthe surface temperature increases with increasing of coating thickness due to decrease in thermal outflow. The increase in maximum temperature relative to the uncoated piston is 64.3 % for 0.13 mm thickness coating. The temperature curves obtained for different thicknesses of the bottom are similar to each other and approximately equidistant. The numerical modeling showed that higher temperature in the combustion chamber is provided by thermal barrier coatings, which increases the efficiency of the engine. Lowering the surface temperature of the piston (substrate) creates favorable conditions for the piston to work.