20216 汎用小型ガソリン機関の燃焼特性に関する研究(第二報)(熱工学(3))

概要

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Experiments have been carried out to examine the influence of oxygen concentration in intake air and fuel concentration on flame speed for small gasoline engine. The travel time of flame front is measured using ionization probes located at different positions from the ignition point of cylinder head. Experimental set up consists of a small gasoline engine (HONDA A-C50: single cylinder, 50cc, 4stroke), and a dynamometer (TOKYO METER EA-10-L). The oxygen concentration in intake air can be changeable from 17vol.% to 21vol.% by connecting the portable air bag and fuel concentration is regulated by changing the needle jet in a carburetor (#42-#72). The main conclusions are as follows: 1) Mean increasing rate of pressure is not affected by oxygen concentration in intake air and fuel concentration under without load. 2) The influence of oxygen concentration in intake air on mean increasing rate of pressure is relatively large with load than without load. 3) Smoke concentration increases with decrease of oxygen concentration in intake air under without load.
一般社団法人日本機械学会の論文
2006-03-09