火花点火機関のサイクル変動について

概要

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A series of experiments was performed in order to point out the cause of the cycle fluctuation which is unfavorable for the engine operation. As the quantitative expression of the cycle fluctuation, √<(x-x)^2>^^^-√<x> was calculated from the successive indicator diagrams, where xs are the readings of maximum pressure on the diagrams, and x^^- is their mean value. This quantity was obtained for various operating variables such as mixture ratio, compression ratio, ignition advance, inlet temperature and gap width of the spark plug. By analysing the result of these experiments, we arrived at the following conclusion. There are two important causes of the cycle fluctuation : one is the fluctuation of mixture ratio due to the insufficient vaporization, and the other is the fluctuation of the initial combustion period which is affected by the mixture strength near the electrodes at the moment of spark passing.
一般社団法人日本機械学会の論文
1952-02-11