采用电控直列泵+冷却EGR技术的国Ⅲ柴油机排放性能的研究  

A Study on the Emission Performance of National-Ⅲ Diesel Engine Using the Technologies of Electronically Controlled In-line Fuel Pump+Cooled EGR

作　　者：邢居真[1] 包俊江[2] 钟绍华[1] 高俊华[2] 

机构地区：[1]武汉理工大学汽车工程学院,武汉430070 [2]中国汽车技术研究中心,天津300162

出　　处：《汽车工程》2010年第1期37-40,共4页Automotive Engineering

摘　　要：研究了采用电控直列泵+冷却EGR技术的国Ⅲ柴油机强制关闭EGR阀对ESC、ETC和ELR循环排放的影响。分析了在调整喷油提前角后的ESC循环试验结果。比较了满足国Ⅲ排放法规的直列泵、电控单体泵和高压共轨3种技术的ESC循环的油耗率。研究结果表明,国Ⅲ柴油机在关闭EGR阀后NOx大幅上升,超过了法规限值;虽通过调整喷油提前角可达到国Ⅲ排放的要求,但油耗率上升,动力性下降;与其它技术相比,采用电控直列泵+冷却EGR技术时国Ⅲ柴油机ESC循环油耗率最低。The effects of closing EGR control valve on the emissions with ESC, ETC and ELR cycles in a national-Ⅲ diesel engine adopting the technologies of electronically controlled in-line fuel pump and cooled EGR are studied, the ESC cycle test results with adjustment on fuel injection advance angle are analyzed, and the ESC cycle specific fuel consumption of national-Ⅲ diesel engines adopting different technologies （in-line fuel pump, unit pump and high pressure common rail） are compared. The results of study show that NOx emission rises greatly and exceeds the regulation limit when EGR control valve is closed; though national-Ⅲ regulation can be met by adjusting fuel injection advance angle but it leads to higher fuel consumption and lower power performance. Compared with other technologies adopted, the national-Ⅲ diesel engine with electronically controlled in-line fuel pump and cooled EGR has lowest specific fuel consumption.

关 键 词：柴油机 排放 燃油系统 直列泵 EGR 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]