摘要
为了降低小负荷工况特别是怠速工况燃油消耗和排放,开发了随机停缸算法,并进行了随机停缸策略的试验研究。试验结果表明:在怠速工况下,相同的停缸数时随机停缸比固定停缸转速波动小且稳定性好;随着停缸数的增加,工作缸的喷油量相应增大,工作缸燃烧持续期和放热率峰值增大,燃烧热损失率越低,降低了燃烧过程的传热损失,从而提高了热效率,起到了很好的节油效果,同时未燃HC、不完全燃烧产物CO和碳烟的排放减少。
In order to reduce the fuel consumption and emissions under low load, especially at idling condition, a random cylinder deactivation algorithm is developed and a relevant experiment is also conducted. The results show that with the same number of cylinders in deactivation, random cylinder deactivation has more stability with less speed fluctuation compared with fixed cylinder deactivation. With the increase in the number of cylinders in deactivation, the fuel injection quantity of working cylinder increases correspondingly so that combustion duration is longer, heat release rate peak also higher and combustion heat loss rate smaller, resulting in lower heat loss, which improves the thermal efficiency and lowers the fuel consumption. Emissions of unburned HC, incompletely burned CO and soot also are reduced obviously.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2016年第5期205-210,共6页
Chinese Internal Combustion Engine Engineering
基金
国家"八六三"高技术研究发展计划项目(2012AA111714)
关键词
内燃机
怠速
随机停缸
转速波动
节油
排放
IC engine
idle
random cylinder deactivation
speed fluctuations fuel-saving
emission