基于EGR的喷射参数对485柴油机性能与排放的试验研究.pdfVIP

基于EGR 的喷射参数对485 柴油机 性能和排放的试验研究 1 1 1 2 1 1 张珂 ，陈希颖 ，张庆 ，盛伟鹏 , 吴学成 ，李训武 （1.无锡油泵油嘴研究所，无锡 214063 ；2.浙江新柴股份有限公司，新昌 312500 ） 摘要：在一台配有电控高压共轨系统的两气门485 柴油机上，进行了基于EGR 技术的试验研究。在试验工况下，通过EGR 率与喷射参数的调整，控制NOx 比排放在3.5g/(kW.h)附近，研究了喷射压力和喷油定时对柴油机性能和排放的影响。研究 结果表明，随着喷射压力的的升高，所需要的EGR 率增加，碳烟（Soot) 比排放持续下降，比油耗 （BSFC)基本无变化；随 着喷油定时的推迟，所需要的EGR 率减小，碳烟比排放先下降再上升，比油耗持续增加。通过喷射参数与EGR 率的调整， 辅以DOC （+POC ）的后处理措施，柴油机满足国四稳态试验的排放要求。 关键词：EGR ；喷射参数；485 柴油机；国四稳态试验 Experimental Research of 485 Diesel Performance and Emissions on Injection Parameters Based on EGR ZHANG Ke1 ，CHEN Xi-ying1 ，ZHANG Qing1 ，SHENG Wei-peng2 ，WU Xue-cheng1 ，LI Xun-wu1 （1.Wuxi Fuel Injection Equipment Research Institute ，Wuxi 214063 ，China; 2.Zhejiang Xinchai Diesel Engine Co.,Ltd ，Xinchang 312500，China ） Abstract ：An experimental research was invesrigated for a 485 diesel with two value maching electronic high-pressure common rail based on EGR. Under the experimental condition , by adjusting the aperture of EGR rates and the injection parameters to keep the NOx emission about 3.5g/(kW ²h), researchs the influence of injection pressure and injection timing on diesel performance and emissions. Test results show that, the required EGR rates increase with raised the injection pressure. Soot weighted emission decreases and BSFC has little change with the injection pressure raised. Meanwhile, the required EGR rates decrease with retarded the injection timing . Soot weighted emission declines with retarded timing, and it turns to increasing when the injection timing is over retartded, with BSFC increasing. By adjusting the injection parameters and EGR rates, the diesel engine can satisfactory China IV steady test emissi