火花点火機関の燃焼安定化に及ぼす火花放電特性の影響 : 第4報,燃焼のサイクル変動の研究

概要

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As an initial combustion period involving the growing process of a initial flame kernel, is easily affected by the cycle-to-cycle air-fuel ratio and gas motion, combustion always fluctuates unstably in a spark ignited engine. In this study, by measuring the phenomena of spark ignition and engine combustion simultaneously, it is clarified that a decrease in cycle-to-cycle spark ignition fluctuation is achieved by increasing spark current. The spark ignition, however, is mainly fluctuated by cycle-to cycle gas motion in-cylinder during ignition timing. When a long durational spark which has a high spark current is given to stabilize the engine combustion, a new aspect has been obtained showing that the initial combustion period can be made to shorten and reduce its fluctuation. Especially, this characteristic of spark ignition is effective for a lean burn, which is fundamentally unstable combustion.
一般社団法人日本機械学会の論文
1986-06-25