摘要
通过改变柴油机的加速时间及负荷进行试验,对比电动补气不同策略对加速烟度的影响。结果表明:由1 400r/min,50N·m加速加载到2 500r/min,100N·m,加速时间为12s,通过采用电动增压器并改变相关补气策略,使原机的最大峰值烟度由0.602m^(-1)降至0.420m^(-1),降幅30.2%;上述加速加载过程中,在无初始补气量的情况下,电动增压器的最终频率越高越好,且采用直线型响应曲线比采用S型响应曲线的烟度低;在有一定初始补气量的情况下,电动增压器理想补气方式为先缓后急。
The effects of different electric-controlled air supplement strategies on smoke during acceleration were compared through the experiment by changing acceleration time and bearing load of diesel engine. The results show that it costs 12 s when the engine switches from the conditions of 1 400 r/min and 50 N · m to 2 500 r/min and 100 N ·m, and the peak smoke of original engine decreases to 0. 420 m^-1 from 0. 602 m^-1 (about 30. 2% decrease) by adjusting the related air supplement strategy with the electric supercharger. Under the condition of initial air non-supplement, the high final frequency of electric supercharger was helpful to reduce the soot and the linear type response curve was easier to lead to a low smoke than S-typed response curve. While under the condition of certain initial air supplement, the ideal air supplement strategy should be slow first and then fast.
出处
《车用发动机》
北大核心
2016年第4期33-37,共5页
Vehicle Engine
基金
西南交通大学大学生科研训练计划国家创新训练项目(201510613033)
关键词
电动增压器
涡轮增压器
柴油机
瞬态
烟度
electric supercharger
turbocharger
diesel engine
transient
smoke