燃焼室内水噴射による副室式ディーゼル機関のNO_x低減効果

概要

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The effect of water injection on NO_x reduction in a high-speed IDI diesel engine was investigated. The results showed that water injection directly into the divided chamber just prior to fuel injection could reduce NO_x emission significantly, without causing deterioration in BSFC and other exhaust emissions including the soluble organic fraction and total particulate matter. The NO_x decreased with an increase in the amount of water injected, and stable combustion was maintained even above a 0.8 water to fuel weight ratio. However, excessive water injection resulted in saturated NO_x reduction and a slight increase in THC. The combustion characteristics with water injection were also examined by means of high-speed photography and in-chamber gas sampling.
一般社団法人日本機械学会の論文
1994-05-25