汽油机过量空气系数的参数特性试验研究.pdf

第39卷第4期 小型内燃机与摩托车 V01．39No．4 2010年8月 SMALLINTERNALCOMBUSTIONENGINEANDMOTORCYCI。EAug．2010 汽油机过量空气系数的参数特性试验研究 李茂月徐雳贾冬开 (哈尔滨理工大学机械动力工程学院黑龙江哈尔滨 150080) 摘要：为了充分发挥发动机的动力性和经济性，研究了定负荷和定转速下汽油机过量空气系数的进气 和燃油消耗特性。研究发现，大中负荷及中高转速下过量空气系数与进气量、燃油消耗量间均呈抛物线 关系；小负荷下过量空气系数与进气量、燃油消耗量间呈反比例关系。定转速时过量空气系数达到最大 (小)值对应的进气管真空度远远高于定负荷下过量空气系数达到最大(小)值对应的进气管真空度。 关键词：过量空气系数进气燃油消耗台架试验 中图分类号：TK411．12文献标识码：A 7 ResearchonExcessAirRatioSParameter Experimental ofGasoline Characteristics Engine Li Li。Jia Maoyue，XuDongkai MechanicalandPower ofScienceand EngineeringCollege，HarbinUniversity 50080，China) Technology(Harbin，Heilongjiang，1 fulluseof and Abstract：Tomake the characteristicsoftheairintakeandfuelcon- auto·powereconomy，tlle for airratiohavebeenstudiedwhichareinthefixedloadand re— sumptiongasolineengine§excess speed．The suitsfoundthatthe betweenexcessairratioandtheothertwo airintake relationship parametersincluding qual— andfuel is for andmediumloads．Howeverforsmall are ity consumptionparabolichigh loads，theyinversely theother vacuumatfixed ismuch thanthatinthefixedload proportional．Onhand，manifold speeds higher formaximumexcessairratio． air test ratio，Airintake，Fuel Keywords：Excess