论文部分内容阅读
以纯氢为燃料的点燃式发动机排气中含有一氧化碳(CO)、二氧化碳(Col)和未燃碳氢化合物(UHC)。这些含碳化合物是由润滑油氧化产生的,它们可以看作是天然的示踪剂,能用来指示因燃烧引起的润滑油消耗。因此,可以用这种新颖的方法来研究影响发动机机油耗的因素,而无需采用更复杂的方法。介绍了通过测定以纯氮为燃料的可变压缩比单缸CFR发动机排气中的CO和CO:浓度得到的燃烧机油耗的试验结果。研究了改变当量比、压缩比(CR>、点火定时(ST)和发生爆震等关键运转变量对机油燃烧的影响。结果表明,机油耗随当量比(即负荷)的增加而增大,而在无爆震情况下运转时,改变压缩比的影响相对较小,一旦出现爆震,机油耗会突然迅速增加。机油的燃烧速率还与燃烧持续期的平均值、总淬冷距离和燃烧产物的计算最高平均温度的变化密切相关。
Pure hydrogen-fueled ignition engines contain carbon monoxide (CO), carbon dioxide (CO 2) and unburned hydrocarbons (UHC) in the exhaust. These carbon compounds are produced by the oxidation of lubricating oils and can be considered as natural tracers and can be used to indicate the consumption of lubricating oil due to combustion. Therefore, this novel method can be used to study the factors that affect engine oil consumption without using more complicated methods. The test results of the fuel consumption of the combustion engine obtained by measuring the concentrations of CO and CO in the exhaust of a variable compression ratio single cylinder CFR engine using pure nitrogen as fuel are presented. The effects of changing the equivalent ratio, compression ratio (CR), ignition timing (ST) and knocking on the engine combustion were studied.The results show that the fuel consumption increases with the equivalence ratio (load) In the absence of knocking operation, change the compression ratio is relatively small, in the event of detonation, fuel consumption will suddenly increase rapidly.The oil burning rate and the average duration of the combustion, the total quenching distance and combustion products The calculation of the highest average temperature changes are closely related.