By the adoption of M-combustion process proposed by J. S. Meurer, the low rate of pressure rise and smoother running will be assured, because combusion takes place after gradual evaporation of the fuel from the combusion chamber wall. Also, the combusion behaviour of this process is almost the same as the prograssive combusion of pre-mixed mixture, so the combusion completes quickly and better thermal efficiency will be assured. This paper covers an experiment with regard to the attempt of M-combustion applied to a swirl chamber, to improve the multifuel capability of diesel engine. And the effects on the combustibility of the wall temperature, dimensions of the fuel injection system, and engine operating conditions were discussed, and engine performances on gas oil and gasoline were compared. As the result, smoother combustion was assured by the adoption of M-combustion on swirl chamber, and if gasoline was used as fuel, exhaust smoke was reduced over a wide load renge. If this process was applied to direct injection engine such as M. A. N., there will exist a weak point concerning the formation of the combustion air swirl, but if a swirl chamber is used, this problem will be solved perfectly.
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