2023年第9期柴油机高原性能及排放标定试验开发顾晨宇(江苏省洪泽中等专业学校,江苏淮安223100)摘要:基于柴油机高原模拟台架进行了增压柴油机高原性能及排放特性的标定试验开发,实验结果表明:除低转速工况外,海拔在1700m时,柴油机基本无降扭;海拔在3000m时,降扭约5.5%,海拔在4500m时,降扭在16.7%到28%之间。相对于海平面,海拔在1700m/3000m/4500m时,最低有效燃油消耗率分别增加1.3%/1.9%/3.5%,上升幅度较小。优化的主喷正时及喷射压力随海拔升高而增大,能够弥补因进气流量降低导致的燃烧速率降低,燃烧重心CA50滞后的问题。开发的高原标定,柴油机增压器转速及涡前排温在机械限值以内。柴油机NOx比排放随海拔升高有所降低,但Soot随海拔升高显著增加,尤其是低转速。关键词:高原;增压柴油机;机械限值;排放特性中图分类号:U464.172文献标识码:A文章编号:1674-957X(2023)09-0006-03CalibrationDevelopmentofAltitudePerformanceandEmissionforDieselEnginesGuChen-yu(JiangsuHongzeSecondaryProfessionalSchool,Huai'an223100,China)Abstract:Basedonthedieselengineplateausimulationplatform,thecalibrationdevelopmentofaltitudeper-formanceandemissioncharacteristicsofdieselenginewascarriedout.Theexperimentalresultsshowthatexceptforlowspeedcondition,theenginealmosthasnotorquederateat1700m;At3000m,torquederateisabout5.5%;andat4500m,thetorquederateisbetween16.7%and28%.Comparetosealevel,altitudewith1700m/3000m/4500m,minimumBSFCincreasingwith1.3%/1.9%/3.5%.Theoptimizedmaininjectiontimingandin-jectionpressureincreasewiththeincreasingofaltitude,whichcanmakeupforcombustionratedecreasingandCA50delayingcausedbythedecreasingofintakeflow.Developedaltitudecalibration,dieselturbospeedandturboinlettemperaturewithinthemechanicallimits.NOxemissionofdieselenginedecreasewithaltitude,butSootincreasedsignificantlywithaltitude,especiallyatlowspeedcondition.Keywords:Altitude;Turbodiesel;Mechanicallimit;Emissioncharacteristics作者简介:顾晨宇(1994—),男,江苏淮安人,助理讲师,研究方向为内燃机燃烧。0引言我国幅员辽阔,地势西高东低,海拔从海平面延伸到5300m[1-2],动力机械运行在高海拔地区,因进气流量减少导致燃烧速率减缓,燃烧持续期延长,燃烧重心后移,缸内燃烧温度增加,柴油机热负荷增加,排气温度...
