CAJ | 학술논문

为研究进气温度、过量空气系数和发动机转速对甲醇HCCI燃烧循环变动和燃烧稳定性的影响，在1台改造的试验发动机上进行相关的试验。试验结果表明：随着进气温度的升高，循环变动变大，最高燃烧压力的分布较为集中；循环变动系数对过量空气系数较为敏感，随着过量空气系数的增大，循环变动变大，最高燃烧压力的分布较为分散；随着转速的增大，循环变动变小，最高燃烧压力的平均值变大，最高燃烧压力分布集中，对于甲醇而言，进气温度为160℃，过量空气系数为2时，n＝1300 r/min是较优的转速。
위연구진기온도、과량공기계수화발동궤전속대갑순HCCI연소순배변동화연소은정성적영향，재1태개조적시험발동궤상진행상관적시험。시험결과표명：수착진기온도적승고，순배변동변대，최고연소압력적분포교위집중；순배변동계수대과량공기계수교위민감，수착과량공기계수적증대，순배변동변대，최고연소압력적분포교위분산；수착전속적증대，순배변동변소，최고연소압력적평균치변대，최고연소압력분포집중，대우갑순이언，진기온도위160℃，과량공기계수위2시，n＝1300 r/min시교우적전속。
In order to study the influences of intake temperature ,excess air coefficient and engine speed on methanol HCCI combustion stability and cycle-to-cycle variation ,the relevant tests were carried out on a retrofit engine .The results show that the cycle-to-cycle variation increases and the distribution of maximum combustion pressure concentrates with the increase of in-take temperature .The excess air coefficient is more sensitive to the coefficient of cycle-to-cycle variation .With the increase of excess air coefficient , the cycle-to-cycle variation decreases and the distribution of maximum combustion pressure scatters . With the increase of engine speed ,the cycle-to-cycle variation decreases ,the mean value of maximum combustion pressure in-creases and its distribution concentrates .For the methanol fuel ,1 300 r/min is the optimal speed at 160 ℃ of intake tempera-ture and when the excess air coefficient is 2 .