摘要
推导了由测量得到的燃烧产物中CO2、CO、O2、NOx和HC的体积分数计算燃料空气混合气空燃比的计算公式.推导的公式考虑了燃料中碳、氢、氧3种组成成分,可用于常见的各种燃料的混合比计算.推导的公式还考虑了空气中氩和水蒸气的含量,因而更适合精确计算混合比的场合.推导的公式还被用于分析空燃比精度的影响参数和点燃式发动机空燃比的计算,结果表明,公式的计算值与其它公式的计算值及仪器指示值的变化趋势是一致的,燃料组成的H/C比、O/C比及空气中水蒸气含量对空燃比的测量结果有较大影响.
The theoretical equation of calculating air-fuel ratio according to the volume fraction of CO2, CO, O2, NOx, HC of combustion products is deduced. The elements H, C, and O in the fuel, the elements N, O, and Ar in the air and water vapor in the air are considered when the equation is deduced. The equation can be used to calculate air-fuel ratio of normal fuels. The equation is used to analyze errors in calculating the air-fuel ratio. The analysis results show that the ratios of fuel H/C, O/C and water vapor in the air have great influence on the measuring results of the air-fuel ratio.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2004年第1期32-36,共5页
Journal of Combustion Science and Technology
关键词
燃烧
化学反应
空燃比
点燃式发动机
排气组成
汽油
Air
Calculations
Chemical reactions
Composition
Exhaust gases
Fuels
Gasoline
Ignition
