Abstract
For the utilization of alcohol fuels in automotive engines, it is interesting to note the studies of the use of alcohol for conventional gasoline engines without any design changes, and of supplying gasous fuels for insufficient fuel against the intake air quantity. This paper reports a comparison of the engine performances of methanol plus gasous fuels such as propane, for a compression ratio of 12:1, against those of the base gasoline engine, for a compression ratio of 8.5:1. The test results obtained are as follows: The maximum engine output is higher by about 13%: maximum brake thermal efficiency is higher by approximately 21% at wide open throttle; and engine emissions are lower, especially for NOx and THC, than those of the base gasoline engine.
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