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针对用于城市道路交通的单一燃料稀燃天然气发动机进行了深入研究.通过多维燃烧数值模拟计算,设计出直口碗型燃烧室;通过一维燃烧数值模拟设计计算,设计出0°CA气门重叠角的配气相位;通过气道稳流试验设计出较原柴油机涡流比低15%的进气道.通过对进气空气量的控制设计、燃气供气量的控制设计和点火控制设计进行了满足高排放要求的控制系统设计.通过对适应火花点火天然气发动机燃烧过程的燃烧系统设计、燃烧系统的试验研究、工作过程的优化研究、发动机控制策略的研究,开发出了满足国家第Ⅳ阶段(国Ⅳ)排放标准的火花点火稀燃天然气发动机.
Aiming at the single fuel lean-burn natural gas engine used in urban road traffic, the direct-fired bowl combustion chamber was designed through the multi-dimensional combustion numerical simulation calculation, and the 0 ° CA valve overlap was designed by one-dimensional combustion numerical simulation design calculation Angle of the gas phase.According to the airway steady flow test, the intake passage with 15% lower than the original diesel engine was designed.Through the control design of the intake air quantity, the control design of the gas supply quantity and the ignition control design To meet the high emission requirements of the control system design.Through the adaptation of spark ignition natural gas engine combustion process combustion system design, combustion system test research, optimization of work processes, engine control strategy research, developed to meet the national Ⅳ stage Ⅳ) emission standard spark ignition natural gas engine.