REDUCED HEAT REMOVAL INTERNAL COMBUSTION ENGINE AND METHOD OF ITS MANUFACTURE Russian patent published in 2001 - IPC

FIELD: power engineering. SUBSTANCE: proposed engine has combustion chamber by parts with two-layer heat insulating coating. First layer of coating is made of multiphase crystal porous material. Second layer of coating pointed to combustion chamber is made in form of refractory solid film. First layer of coating, whose thickness is 0.1 - 0.3 mm, has hard inclusions of phase α-Al₂O₃, dispersed in matrix of phase γ-Al₂O₃ and compounds of mullite 3•Al₂O₃•2SiO₂. Thickness of walls between adjacent pores in layer is equal to 0.18-0.22 of pore radius. Second layer of coating made in form of film has thickness of 2-20 mcm, blackness degree of material being not less than 0.8 within working temperature range. Method of manufacture of engine comes to the following: prior to assembling the engine, first layer of coating is applied to surfaces of engine parts forming combustion chamber, and then second layer is applied. First layer is applied by anode-cathode-microarc oxidation method, and second layer is applied by ion deposition method. EFFECT: reduced heat removal, increased engine efficiency and service life. 5 cl, 2 dwg