电增压促进废气再循环对发动机性能的影响
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1.安徽工贸职业技术学院机械与汽车工程系, 安徽 淮南 232007;2.奇瑞汽车股份有限公司汽车工程技术研发总院, 安徽 芜湖 241006;3.铜陵职业技术学院机械工程系,安徽 铜陵 244000

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安徽省教育厅自然科学研究重点项目(2022AH053025、KJ2021A1343)。


Effect of Electric Supercharging Promotion of Exhaust Gas Recirculation on Engine Performance
Author:
Affiliation:

1.Department of Mechanical and Automotive Engineering, Anhui Vocational & Technical College of Industry & Trade, Huainan, Anhui 232007, China;2.Chery Automotive Co. Ltd., Wuhu, Anhui 241006, China;3.Tongling Polytechnic, Tongling, Anhui 244000, China

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    摘要:

    在一台1.5 L带废气涡轮增压的直喷汽油机上进行了电动增压和废气再循环(exhaust gas recirculation, EGR)协同对发动机动力性和经济性的影响规律试验研究。结果表明:全负荷下电动增压促进最高废气再循环率随转速的上升而下降,在4个试验转速下分别提升了17.7%、15.2%、13.84%和0;部分负荷下电动增压促进最高废气再循环率随负荷的提高与转速下降,在6个试验工况下最高废气再循环率分别被提高了23.63%、30.31%、0、14.09%、19.74%和0。全负荷与较低的3个转速下电动增压介入后有效燃油消耗率(brake specific fuel consumption, BSFC)降低近10%,最高转速下废气涡轮增压完全取代电动增压;部分负荷下的两组工况内,电动增压介入后,最高BSFC降低了10.8%和8.4%。结论表明合理应用电增压促进最高废气再循环率可以提升发动机的燃油经济性并保持较高的动力性。

    Abstract:

    An experimental study was carried out on the synergistic effect of electric supercharging and exhaust gas recirculation (EGR) on engine power and economy on a 1.5 L direct injection gasoline engine with exhaust gas turbocharging. The results show that under full load, the maximum EGR rate promoted by electric supercharging decreases with the increase of rotational speed, and increases by 17.7%, 15.2%, 13.84% and 0 respectively under the four experimental rotational speeds. Under partial load, the maximum EGR rate promoted with electric supercharging decreases with the increase of load and rotational speed. Under six experimental conditions, the maximum EGR rate is increased by 23.63%, 30.31%, 0, 14.09%, 19.74% and 0 respectively. Under full load and at three lower rotational speeds after the intervention of electric supercharging, the brake specific fuel consumption (BSFC) is reduced by nearly 10%. At the highest speed, exhaust gas turbocharging completely replaces electric supercharging. In two groups of working conditions under partial load and after the intervention of electric supercharging, the maximum BSFC is reduced by 10.8% and 8.4%. It is concluded that the reasonable application of electric supercharging to promote the highest EGR rate can improve the fuel economy and maintain higher power performance of the engine.

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周颖,潘金元,尹爱勇.电增压促进废气再循环对发动机性能的影响[J].西昌学院学报(自然科学版),2023,37(3):46-51.

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  • 收稿日期:2022-04-24
  • 最后修改日期:2022-07-01
  • 录用日期:2023-09-03
  • 在线发布日期: 2023-11-06