Effect of Dimensions of Prechamber on Lean Burn Gas Engine

概要

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The effect of the dimensions of a prechamber was researched using a medium-sized single-cylinder engine. The air-fuel ratio, A/F, in the prechamber changed quickly, when only gas was supplied to the prechamber. The amount of gas supplied, ignition timing, and A/F in the main chamber were affected by A/F in the prechamber at ignition timing. A larger volume ratio of the prechamber results in a higher level of NO_x emission and lower level of heat consumption. However, optimizing the dimensions of the hole results in improvement in the heat consumption level while maintaining the same level of NO_x emission. Suitable A/F in the prechamber allows the engine to function, but this is also the source of NO_x. The volume of the prechamber must be small and the dimensions of the hole must be optimized.
一般社団法人日本機械学会の論文
1994-11-15