二サイクルガソリン噴射機関の噴射時期と性能

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  • Injection Timing and Performance of a Two-Stroke-Cycle Gasoline Injection Engine
  • ニ サイクルガソリン フンシャ キカン ノ フンシャ ジキ ト セイノウ

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Compression ratio of Otto engine can be increased by injecting fuel into the combustion chamber shortly before the spark occurs. However, if the fuel is injected too late, it can not be evaporated and mixed with air rapidly enough to make it undergo perfect combustion. The performances with the testing engine -the uniflow type, crankcase compression, two-stroke-cyc1e gasoline injection engine-were measured at the various injection timing without throttling air just like a Diesel engine. At the retarded injection with 51 octane gasoline, the maximum mean effective pressure was 5.4 kg/cm2 and the minimum fuel consumption was 240 g/〓/h. However, at the advanced injection knock occured under heavy loads, and at an intermediate timing of the two, the ignition failed to take place at light loads.

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