| 摘要 |
PCT No. PCT/JP97/01814 Sec. 371 Date Nov. 23, 1998 Sec. 102(e) Date Nov. 23, 1998 PCT Filed May 28, 1997 PCT Pub. No. WO97/45629 PCT Pub. Date Dec. 4, 1997An energy conservation cycle engine which protects environmental pollution by reducing NOx gases, unburned materials and increases the specific output power per weight by reducing friction-loss and vibration, by reducing the wall thickness of the main combustion chamber, and by raising the maximum combustion pressure thereby reducing CO2 in the exhaust gas. A piston has a cup-like recess at its top and a small diameter piston protrudes therefrom. A cylinder head conforms with the shape of the piston to accept the protruded portion so as to form two combustion chambers, a main chamber and a sub-chamber, and the lower end of the sub-chamber is tapered to accelerate the movement of the combustion gas between the two chambers.
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