Performance of a Two-Stroke-Cycle Gasoline Injection Engine

概要

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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 the air rapidly enough to make it undergo perfect combustion. The performances with the testing engine-the uniflow type crankcase compression, twostroke-cycle gasoline injection engine-were measured at the various injection timings without throttling air just as a Diesel engine. At the retarded injection with 51 octane gasoline, the maximum mean effective pressure was 5.4kg/cm^2 and the minimum specific fuel consumption was 240 g/HP/hr. However, at the advanced injection, knock occurred under heavy loads, and at an intermediate timing between the two, the ignition failed to take place at light loads.
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