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To improve the power and fuel and economic performance of a gasoline internal combustion engine, it has been proposed to improve the insulating properties of the piston by forming a heat-insulating coating on the working surfaces of the piston head with a thickness of 25...30 μm using the microarc oxidation method. Comparative results of engine tests are carried out, which showed that an engine equipped with pistons with a heat-insulating coating on the working surfaces of the head increasesdoi:10.1051/bioconf/20201700078 fatcat:xns44mexlba7pkpui2dmuexvh4