| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a structural defect, which is pointed out to be responsible for air pollution because of the exhaust gases containing noncombusted fuel and lubricating oil, that noncombusted fuel leaked from a scavenging port into a cylinder and a part of fresh charge containing the lubricating oil tend to be discharged together with combusted gas from the exhaust port, to solve a problem of a deterioration in thermal efficiency caused by the unnecessary discharge of fuel, and to directly use vegetable oil as part of the fuel. SOLUTION: First, the vegetable oil is sprayed within an engine as lubricating oil for the engine, and the lubricating oil accumulated within a tank is heated by recovering the lubricating oil of high temperature after the lubrication to the tank. Then the high viscosity of the vegetable oil, which exacerbates a machine loss at the time of lubrication and is a challenge for the vegetable oil, is reduced, and the high temperature and oscillation within the engine are utilized. Then the vegetable oil, which becomes combustible steam because the vaporization of the lubricating oil is promoted, is mixed with the fresh charge filling a crank chamber for its lubrication, and shoulders part of the fuel. COPYRIGHT: (C)2006,JPO&NCIPI
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