四サイクル機関の吸込効率に関する研究 : (第6報発火運転について)

概要

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To apply some conclusions obtained from the motoring tests in the previous reports to the case of firing operation, the effects of firing on the volumetric efficiency should be investigated. In the preliminary motoring experiments, it is verifiled that an inserting of a carburetor in the intake-system not only reduces the values of volumetric efficiency but causes a considerable shift of the engine speed where the maximum efficiency takes place to the lower speed. This fact is also proved theoretically. From the experimental and theoretical results in firing, the following are concluded : 1) Pressure-change of the residual gas has some effects upon the efficiency but no influences upon the inertiasupercharging or the conditions giving the maxumum efficiency. 2) Temperature-change of an intaken air in the cylinder makes the efficiency a little low and the speed of the maximum value slide fairly to the higher speed. As regards the latter phenomenon it is shown that considering a correction for the temperature-change in an acoustic velocity contained in the characteristic number ζ, the case of firing may be identical with that of motoring.
一般社団法人日本機械学会の論文
1953-08-10