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首页> 外文会议>自動車技術会大会 >Premixed Diesel Combustion and Emissions Characteristics Controlled by a Variable Valve Timing Mechanism - Study of combustion conditions achieving simultaneous reduction of NO{sub}x and smoke
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Premixed Diesel Combustion and Emissions Characteristics Controlled by a Variable Valve Timing Mechanism - Study of combustion conditions achieving simultaneous reduction of NO{sub}x and smoke

机译：由可变气门正时机构控制的预混合柴油燃烧和排放特性 - 研究燃烧条件，实现NO {SUB} x和烟雾的同时减少

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摘要

Premixed diesel combustion and emissions were controlled at medium speed and load by using a variable valve timing (VVT) mechanism in a light duty diesel engine. Combustion conditions satisfying simultaneous reduction of NO{sub}x and smoke were experimentally verified. The effects of premixing time, excess air ratio, ambient density at fuel injection and combustion temperature were investigated on NO{sub}x and smoke characteristics. The oxygen concentration of the intake gas was a dominant factor for low NO{sub}x combustion. Prolonging the premixing time under high excess air ratio and ambient density under high combustion temperature has a significant potential for reducing smoke.
机译：通过在轻型柴油发动机中使用可变气门正时（VVT）机构，以中速和负载控制预混合的柴油燃烧和排放。实验验证了满足NO {Sub} X和烟雾的同时减少的燃烧条件。在NO {Sub} X和烟雾特性上研究了预混合时间，过量空气比，燃料喷射和燃烧温度的环境密度的影响。进气气体的氧浓度是低NO {} x燃烧的主要因素。在高燃烧温度下在高过量的空气比和环境密度下延长预混合时间具有减少烟雾的显着潜力。

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