具有自动控制功能的柴油机EGR系统的研制

Development of Diesel Engine EGR System with Autocontrolling Function

研究了与柴油机匹配的电控废气再循环系统,进行了电控EGR系统中的部分硬件、硬件电路设计和软件的编写,EGR的实现方式和EGR系统与柴油机匹配的问题。试验用柴油机在使用了自行设计的电控EGR系统后,实现了整个转速、负荷范围内EGR率的自动控制。13工况排放测试结果表明:采用EGR系统,NOx排放降低26.7%、微粒总量和HC排放几乎不变、CO排放上升15.5%。

The electron-controlled exhaust gas recirculation（ECEGR） system for diesel engine,including designs of the partial ECEGR system hardwares and their circuits,software development,EGR implementation mode and matching EGR system with engine,was studied.By using the ECEGR system self-developed,the automatic control of EGR rate in entire speed and load ranges was realized.Through 13 mode cycle test by means of the ECEGR system,it is demonstrated NOx emissions decrease by 26.7 %,total PM and HC emissions are almost the same,but CO emission increases by 15.5 %.