汽车工程 ›› 2021, Vol. 43 ›› Issue (5): 667-674.doi: 10.19562/j.chinasae.qcgc.2021.05.004

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电量保持阶段增程器的排放与工作特性的试验研究

王长卉1,2,刘泽民2,李雁飞2(),帅石金2,邵慧芳3,王银辉3   

  1. 1.烟台大学机电汽车工程学院,烟台 264005
    2.清华大学,汽车安全与节能国家重点实验室,北京 100084
    3.雅富顿化工(苏州)有限公司,苏州 215000
  • 收稿日期:2020-08-21 修回日期:2020-11-15 出版日期:2021-05-25 发布日期:2021-05-18
  • 通讯作者: 李雁飞 E-mail:liyf2018@tsinghua.edu.cn

An Experimental Study on Emissions and Operation Characteristics of a Range Extender Under Charge Sustaining Mode

Changhui Wang1,2,Zemin Liu2,Yanfei Li2(),Shijin Shuai2,Huifang Shao3,Yinhui Wang3   

  1. 1.School of Electromechanical and Automotive Engineering,Yantai University,Yantai 264005
    2.Tsinghua University,State Key Laboratory of Automotive Safety and Energy,Beijing 100084
    3.Afton Chemical (Suzhou) Co. ,Ltd. ,Suzhou 215000
  • Received:2020-08-21 Revised:2020-11-15 Online:2021-05-25 Published:2021-05-18
  • Contact: Yanfei Li E-mail:liyf2018@tsinghua.edu.cn

摘要:

利用转鼓试验台测试了某款处于电量保持阶段的增程式混合动力汽车在WLTC循环下的排放特性和排气温度、转速、负荷、冷却水温度与机油温度等特性参数的变化。结果表明:与传统发动机相比,该增程器暖机速度和机油温升明显偏快;增程器启动以及负荷和速度骤变时,气体排放物会明显增多;增程器的首次启动和后续重启会恶化PN排放,且颗粒物粒径呈现核态向积聚态变化的特点;在车辆减速断油工况下,增程器会产生高浓度颗粒物,其浓度比启动时高一个数量级;启动和减速时的颗粒物排放恶化与机油温度和增程器热状态密切相关;在WLTC循环下,该款增程器工作转速主要集中在低转速区域(2 250~2 400 r/min),而负荷则相对集中在40%~60%和90%~100%范围;增程器转速和负荷呈现出随车速(中速、高速和超高速阶段)而变的有一定规律性的运行轨迹。

关键词: 增程式混合动力汽车, 电量保持, 排放, 工作特性

Abstract:

The changes of emission characteristics and operation parameters including exhaust temperature, rotational speed, load, coolant temperature and oil temperature of a range?extended hybrid electric vehicle under the charge sustaining mode are tested over the WLTC cycle on a chassis dynamometer. The results show that the warm up and the oil temperature rise of range extender are much faster than those in traditional engine. In the conditions of start and abrupt change in load and speed, the gaseous emissions of range extender increase, and in the first start and the subsequent restarts, the PN emissions of range extender may deteriorate with a trend of its particle size moving from nucleation mode to accumulation mode. During vehicle deceleration by fuel cut?off, the range extender may generate particulates with a concentration of one?order higher of magnitude, and the deterioration of particulate emission in start and deceleration stage is closely related to the oil temperature and thermal state of range extender. Under WLTC cycle, the range extender mostly works on the low speed areas (2 250~2 400 r/min) and a load ranges of 40-60% and 90%-100%. The speed and load of range extender follow a moving trajectory changing with speed range (medium, high and extra?high speed) with certain rule.

Key words: extended?range hybrid electric vehicle, charge sustaining, emissions, operation characteristics