基于欧-Ⅵ柴油机排气热量管理主动控制措施研究  

Study on Active Control Measures of Exhaust Thermal Management for Euro-Ⅵ Diesel Engine

作　　者：唐蛟 李国祥[1] 孙少军 王意宝 冯海浩 王堃 

机构地区：[1]山东大学能源与动力工程学院,济南250061 [2]潍柴动力股份有限公司技术中心,潍坊261205

出　　处：《内燃机工程》2015年第2期120-125,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家“八六三”高技术研究发展计划项目(2012AA111706)

摘　　要：利用发动机台架试验研究了中低负荷稳态工况下进气节流阀、喷油提前角、喷射压力和后喷等排气热量管理主动控制措施对排气温度的影响，并基于欧一Ⅵ排放法规要求的瞬态测试循环（world harmonized transient cycle，WHTC）验证排气温度提升的效果。稳态试验结果表明：与进气节流阀不工作时相比，在进气节流阀开度约15％～20％时排气温度提高了140℃左右，NOx排放减小，PM排放和燃油消耗率均增大；喷油提前角和喷射压力的改变对排气温度影响较小，对NOx排放、PM排放和燃油消耗率影响较大；后喷角度和后喷油量的合理匹配，可以提高排气温度约70℃。wHTC测试循环试验结果表明：排气温度在整个循环内均得到有效提升，怠速工况和低负荷工况提升尤为明显。Control of exhaust thermal management is the premise of achieving DPF regeneration. The effects of active control of exhaust thermal management including intake throttle valve, injection advance angle, injection pressure and post injection on exhaust temperature in medium and low load steady conditions were studied by bench test. The WHTC for Euro-VI diesel engine was used to evaluate the effectiveness of exhaust temperature improvement. The steady experiment results demonstrate that the exhaust temperature is increased by about 140℃ with 15% to 20% opening of intake throttle valve compared with the full opening, and NOx emission decreases, but PM emission and fuel consumption all increase. The change of injection advance angle and injection pressure has little effect on the exhaust temperature, hut has a great effect on NOx emission, PM emission and fuel consumption. Appropriate combination of the angle and quantity of post injection may raise the exhaust temperature by about 70℃. The WHTC transient cycle experiment results show that the exhaust temperature is effectively increased within whole cycle, especially at idle and low load conditions.

关 键 词：内燃机 排气热量管理 主动再生 WHTC测试循环 排气温度控制 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]