电动补气策略对废气涡轮增压柴油机加速烟度影响的试验研究

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1400r/min,50N·m加速加载到2500r/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0.602 m-1降至0.420 m-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.

Effect of Electric-controlled Air Supplement Strategy on Smoke of Turbocharged Diesel Engine during Accelerating Process

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 1400 r/min and 50 N · m to 2500 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 .