| 摘要 |
PROBLEM TO BE SOLVED: To improve productivity and save labor by simplifying a structure which has been normally provided at a cylinder upper part for charging air and exhausting gas in a conventional engine, and includes a tappet, a spring, a cam, and a camshaft in concrete, and requires complicated and delicate adjustment. SOLUTION: This invention does not require the structure at all and comprises only shafts 2, 5 having two slits. Intake and exhaust are controlled by rotating the shafts 2, 3 and changing slit positions. In this method, assembly and adjustment are simplified and improvement of productivity is expected. In a case of a multiple cylinder structure engine, two shafts having a slit for each cylinder can coped with cylinders arranged in series. It is ideal to accurately work the slit, since timing slippage of each cylinder is not theoretically generated. COPYRIGHT: (C)2009,JPO&INPIT
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