| 摘要 |
PROBLEM TO BE SOLVED: To obtain a method of adopting a longer effective stroke than an effective compression stroke when using a piston valve or a rotary valve for 4-cycle engines or 6-cycle engines. SOLUTION: A valve (a piston valve) or a port (a rotary valve) which opens at the top dead center and closes at the bottom dead center during the intake stroke (the first intake stroke in the 6-cylinder engine), or the valve or the port which closes at the bottom dead center or opens just before the top dead center during the compression stroke is provided in the 4-cycle engines or the 6-cycle engines, and empty space (where fuel-air mixture or air temporarily stagnates) is attached. Due to relationship that the compression ratio is larger than the expansion ratio (required in the empty space), in consuming the same quantity of fuel, it enables to transmit energy (power torque) generated by explosion to the piston and a crankshaft as much as possible compared with when the piston valve or rotary valve are used for conventional 4-cycle engine or 6-cycle engine. COPYRIGHT: (C)2005,JPO&NCIPI
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