柴油机相继增压系统瞬态切换策略试验研究  

Investigation on transient switching strategy of diesel engine sequential turbocharging system

作　　者：李昕光[1,2] 王银燕[2] 何清林[2] 

机构地区：[1]东北林业大学交通学院,黑龙江哈尔滨150040 [2]哈尔滨工程大学动力与能源学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2013年第8期972-977,共6页Journal of Harbin Engineering University

基　　金：船舶柴油机关键系统绿色制造技术与集成应用研究资助项目(2012BAF01B01);中央高校基本科研业务费专项资金资助项目(DL11BB38)

摘　　要：以降低瞬态切换过程碳烟排放为目标,对柴油机相继增压系统瞬态切换的优化控制问题进行了研究.应用搭建的瞬态试验系统测量了受控增压器切入过程中,空气阀迟于燃气阀开启时间分别为0 s,0.5 s,1.5 s和2.5 s的发动机性能参数和烟度排放等数据.试验数据显示,当受控增压器的空气阀和燃气阀同时打开时,发动机转速波动很大并且碳烟排放恶化;而如果切换延迟时间过大,则发动机转速波动频繁,主增压器进气压力下降较多,瞬态切换过程的烟度排放也相应增加.通过对瞬态试验数据的综合分析,得到了柴油机相继增压系统的最优控制策略.For reducing soot emission in transient state, the optimal transient switching strategy of the diesel engine sequential turbocharging ( STC) system was investigated. In the transient switching experiments, the diesel engine performance parameters and soot emission were measured when the delay time between the air valve open and the gas valve open is 0 s,0.5 s,1.5 s and 2.5 s, respectively, during the controlled turbocharger switch-in process. The experiment results showed that the engine speed waved evidently and the soot emission deteriorated when the air valve and gas valve opened simultaneously;However, the longer the switching delay time was, the more the engine speed waved, the more the main turbocharger pressure dropped and the more the transient soot emission increased. The optimal transient switching strategy is obtained based on the analysis of the engine performance parameters and soot emission at switching condition.

关 键 词：相继增压 柴油机 切换策略 碳烟排放 试验研究 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]