汽油/柴油双燃料HPCC高负荷研究:转速影响与优化

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"汽油/柴油双燃料HPCC在不同转速下的高负荷研究" 在当前的环保与能源需求背景下,汽油/柴油双燃料技术因其能有效降低排放和提高燃油效率而受到广泛关注。高比例预混合低温燃烧(HPCC)模式是一种创新的燃烧方式,旨在减少氮氧化物(NOx)、烟炱(Soot)等有害排放,并优化发动机性能。马帅营、郑尊清和尧命发的研究深入探讨了这一技术在不同转速下的应用。 该研究在一台经过改造的单缸柴油机上进行,采用汽油进气道喷射与柴油缸内直喷相结合的方式,以实现双燃料的预混合。在1600r/min的转速下,研究人员分析了影响负荷扩展的各种运行参数,通过逐步增加油量和调整运行条件,以满足严格的排放和性能标准:NOx不超过0.4g/(kW•h),Soot不高于0.01g/(kW•h),最大压升率(MPRR)限制在1MPa/°CA以内,循环波动系数(COVIMEP)保持在10%以下。 研究发现,在900至2500r/min的转速范围内,可以找到高负荷优化点。在这个点上,瞬时平均有效压力(IMEP)会受到NOx排放、最大压升率和极限缸压的共同影响,随着转速的增加而增加,于2300r/min时达到最大值1.2MPa。同时,指示比油耗在1900r/min时最低,为168.6g/(kW•h),显示了良好的燃油经济性。 然而,值得注意的是,采用这种燃烧模式时,氢碳化合物(HC)和一氧化碳(CO)排放可能偏高。为解决这个问题,研究建议可采用氧化催化剂后处理系统来进一步降低这些排放物。 该研究的关键词包括汽油、柴油、双燃料、HPCC和高负荷,表明其核心关注点在于多燃料策略如何在不同工况下实现高效且低排放的燃烧。中图分类号TK442则将此研究归类于内燃机工程领域。 这项工作为汽油/柴油双燃料HPCC模式在不同转速下的应用提供了宝贵的数据和见解,有助于推动更清洁、更高效的发动机设计。通过优化燃烧过程,未来可能实现更广泛的应用,同时减少对环境的影响。

feScore - EPA Fuel Economy Score (负1 = Not available) fuelCost08 - annual fuel cost for fuelType1 ($) (7) fuelCostA08 - annual fuel cost for fuelType2 ($) (7) fuelType - fuel type with fuelType1 and fuelType2 (if applicable) fuelType1 - fuel type 1. For single fuel vehicles, this will be the only fuel. For dual fuel vehicles, this will be the conventional fuel. fuelType2 - fuel type 2. For dual fuel vehicles, this will be the alternative fuel (e.g. E85, Electricity, CNG, LPG). For single fuel vehicles, this field is not used ghgScore - EPA GHG score (负1 = Not available) ghgScoreA - EPA GHG score for dual fuel vehicle running on the alternative fuel (负1 = Not available) guzzler- if G or T, this vehicle is subject to the gas guzzler tax highway08 - highway MPG for fuelType1 (2) highway08U - unrounded highway MPG for fuelType1 (2), (3) highwayA08 - highway MPG for fuelType2 (2) highwayA08U - unrounded highway MPG for fuelType2 (2),(3) highwayCD - highway gasoline consumption (gallons/100miles) in charge depleting mode (4) highwayE - highway electricity consumption in kwhrs/100 miles highwayUF - EPA highway utility factor (share of electricity) for PHEV hlv - hatchback luggage volume (cubic feet) (8) hpv - hatchback passenger volume (cubic feet) (8) id - vehicle record id lv2 - 2 door luggage volume (cubic feet) (8) lv4 - 4 door luggage volume (cubic feet) (8) make - manufacturer (division) mfrCode - 3character manufacturer code model - model name (carline) mpgData - has Your MPG data; see yourMpgVehicle and yourMpgDriverVehicle phevBlended - if true, this vehicle operates on a blend of gasoline and electricity in charge depleting mode pv2 - 2door passenger volume (cubic feet) (8) pv4 - 4door passenger volume (cubic feet) (8) rangeA - EPA range for fuelType2 rangeCityA - EPA city range for fuelType2 rangeHwyA - EPA highway range for fuelType2 trans_dscr - transmission descriptor; see http://www.fueleconomy.gov/feg/findacarhelp.shtml#trany trany - transmission UCity - unadjusted city MPG for fuelType1; see the description of the EPA test procedures UCityA - unadjusted city MPG for fuelType2; see the description of the EPA test procedures UHighway - unadjusted highway MPG for fuelType1; see the description of the EPA test procedures UHighwayA - unadjusted highway MPG for fuelType2; see the description of the EPA test procedures VClass - EPA vehicle size class year - model year youSaveSpend - you save/spend over 5 years compared to an average car ($). Savings are positive; a greater amount spent yields a negative number. For dual fuel vehicles, this is the cost savings for gasoline. sCharger - if S, this vehicle is supercharged tCharger - if T, this vehicle is turbocharged翻译

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