摘要
利用农林废弃物可控热裂解产生的生物质气作为火花点火发动机的燃料,测录了发动机的示功图。通过对峰值压力变动系数、峰值压力出现位置、峰值压力和峰值平均压力的差值及出现位置进行数学统计,研究了影响发动机燃烧循环变动的因素。统计数据表明:热裂解火花点火生物质气发动机中等负荷时的燃烧循环变动系数较大,高负荷时燃烧循环变动系数较小;峰值压力差值及出现位置的波动性均随点火提前角的增大及压缩比的提高而变大,燃烧循环变动亦随之增强;在整个功率范围内发动机的燃烧稳定性较好。
The biogas that was produced through controllable thermal cracking of farming and forestry disposables was used as fuel of a spark-ignition biogas engine, and the indicator diagram of the engine was measured. The factors influencing the cycle-to-cycle combustion variation were studied through the statistical analysis of peak pressure variation coefficient, appearance phase angle of peak pressure, difference between peak pressure and peak average pressure as well as its corresponding appearance phase angle. The statistical datas show that the cycle-to-cycle combustion variation coefficient of the spark-ignition biogas engine is larger at medium load, but it is less at high load. The peak pressure difference and the fluctuation of its corresponding appearance phase angle increase and the cycle-to-cycle combustion variation aggravates with the increase of the spark ignition advanced angle and compression ratio. The biogas engine has a better combustion stability in the range of whole power output.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2009年第4期19-23,共5页
Chinese Internal Combustion Engine Engineering
基金
国家"八六三"高技术研究发展计划项目(2006AA11A1A8)
山东省自然科学基金(2006ZRB02354)
关键词
内燃机
热裂解
火花点火
生物质气发动机
燃烧循环变动
IC engine
thermal cracking
spark-ignition
biogas engine
cycle-to-cycle combustion variation
