| 摘要 |
PURPOSE: An engine for decreasing blow-by gas is provided to reduce blow-by gas, and to prevent pollution of an intake system by improving sealing efficiency in compressing with forming a ring groove, a blow-by gas shutoff ring and a ring combination groove. CONSTITUTION: An engine has a cylinder head; a cylinder block; a piston(3); a piston ring contacted to the cylinder and fitted to the piston to prevent leak of compressed gas; a ring groove(9) formed on the upper part of the piston ring; a blow-by gas shutoff ring(10) protruded upward and inserted to the ring groove; and a ring combination groove(14) formed in the cylinder head and combined with the blow-by gas shutoff ring protruded on the piston at the top dead center of the piston. Leakage of blow-by gas is prevented with sealing efficiently by buffering through the compression spring.
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