| 摘要 |
PURPOSE:To improve the heat resistance and thermal insulation of combustion chamber thus to improve the thermal efficiency and to reduce the size by applying ceramic onto the inner face of cylinder head facing against the combution chamber, the bore inner face of cylinder block and the outer face of piston. CONSTITUTION:When applying in multi-cylinder engine for vehicle, alumina system ceramic coating layer 3 is formed on the bore inner face of aluminum alloy cylinder block 1 arranged on the crank case 2. While alumina system ceramic coating layers 7, 10 are formed respectively on the outercircumferential face and the upper face of aluminum alloy piston 5 and the inner face facing against the, the combustion chamber 9 of cylinder head 8. Consequently, water jacket is not required for the cylinder block 1 thereby the pitch between the cylinders can be set to the minimum resulting in shortening of the overall length of cylinder block 1. |
