異種燃料を用いた汎・農業用小形２サイクル機関の研究

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  • Study of a small two-stroke cycle engine for industrial and farm use using dual fuels.
  • イシュ ネンリョウ オ モチイタ ハン ノウギョウヨウ コガタ 2サイクル キ

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This paper deals with the use of methanol, propane and methane which are got easy as the substitutive fuels of internal combustion engine in the small two-strok cycle engine for industrial and farm use.<br>In this study, the above mentioned fuels were compared with gasoline in the respects of combustion characteristic, power performance, specific fuel consumption, scavenging performance such as delivery ratio, trapping efficiency or charging efficiency in the gas exchange process and emission gases such as carbon monoxide or nitrogen oxide, etc..<br>As the results, characteristics of each fuel were found. For example, a power performance (indicated mean effective pressure) in using methanol is best and it in using other fuels is lower in order of gasoline, propane and methane. Heat release rate or maximum pressure in a cylinder is also in the same order.<br>The concentration of poisonous carbon monoxide emission gas, which is produced in rich mixing, is affected remarkably by the excess air ratio. The concentration of nitrogen oxide is in the heighest level for gasoline and is nearly half for other fuels.

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