利用缸压信息的柴油机并联混合动力控制  

Study on the control of diesel parallel hybrid power system with in-cylinder pressure information

作　　者：方成[1] 杨福源[1] 欧阳明高[1] 陈林[2] 

机构地区：[1]清华大学安全与节能国家重点实验室,北京100084 [2]上海汽车集团股份有限公司技术中心,上海201206

出　　处：《哈尔滨工程大学学报》2013年第6期696-702,共7页Journal of Harbin Engineering University

基　　金：国际科技合作计划专项基金资助项目(2010DFA72760)

摘　　要：为了优化柴油机并联混合动力控制,使用自主的燃烧状态分析单元,对一台2.5 L高压共轨柴油机各缸缸内压力进行采集,并计算出平均指示压力、平均泵气压力和最大缸压等燃烧状态指标;发动机控制单元使用这些指标预估发动机输出的有效扭矩并进行扭矩闭环控制;利用该发动机、自动离合器、超级电容和ISG电机构建了并联式混合动力系统,用以改善原机的动力性和经济性.在发动机台架上的实验结果表明,扭矩预估和扭矩闭环控制效果良好;使用ISG电机快速起动改善了起动阶段的排放和经济性;在等效NEDC工况下,并联混合动力系统比原单一动力发动机油耗下降11.9%,NOx排放下降15.2%,碳烟排放下降9.5%.In order to optimize the control of diesel parallel hybrid power system, an self-developed combustion state analysis unit was used to collect every cylinder＇s in？cylinder pressure of a 2.5 L common rail diesel engine, and calculate indicated mean effective pressure, pumping mean effective pressure, and peak cylinder pressure, etc. With these indicators, the engine control unit may preestimate effective torque outputted by the engine and control the torque in a closed loop. A parallel hybrid power system was set up using this engine, an automated clutch, an ISG motor and an ultra？capacitor, so as to improve the transient performance of former engine and make it more e？conomical. Experimental results on the engine pedestal proves that the torque preestimation and closed？loop control work well, and there＇s a good potential for the reduction of fuel consumption and pollutant emissions. Under an e？quivalent NEDC cycle, when compared to the original diesel engine, the hybrid power system was able to reduce a？bout 15.2% NOxemission and 9.5% soot emission while fuel consumption was also 11.9% lower.

关 键 词：并联混合动力系统 燃烧状态分析单元 平均指示压力 扭矩预估 扭矩闭环控制 

分 类 号：U464[机械工程—车辆工程]