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Cold Start Emission Characteristics and Its Effects on Real Driving Emission Test

  • Xiaowei WangEmail author
  • Xiaojun Jing
  • Jingyuan Li
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 929)

Abstract

Worldwide harmonized light vehicles test cycle (WLTC) and real driving emission (RDE) tests were conducted for a light duty vehicles equipped with a gasoline direct injection (GDI) engine in accordance with the China 6 emission regulation of light-duty vehicles. Results show that compared to the cold WLTC test, the emissions of CO, NMHC, THC, PM, PN and NOx from a hot WLTC test are reduced by 91%, 71%, 61%, 39%, 37% and 27%, respectively. For RDE test, when calculating the cold start phase, the emissions of CO, PN and NOx are 24.2%, 2.2 and 3.4% higher than the emissions when excluding the cold start phase. CO2 emission from a hot WLTC is lower than that from a cold WLTC. Especially in the low speed phase, CO2 emission from a hot WLTC is 14% lower than that from a cold WLTC. When using CO2 emission from a cold WLTC and a hot WLTC respectively for move average window (MAW) calculation, the result shows that CO2 value has little effect on the conformity factor of each emission, but has a significant effect on verification of trip completeness and normality.

Keywords

Light-duty vehicle Cold start Real driving emissions Emission characteristics Move average window 

Notes

Acknowledgement

Supported by China Ministry of Science and Technology’s Air Pollution Cause Control Technology Special Project (2016YFC0208002).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.China Automotive Technology and Research Center Co., Ltd.TianjinChina

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