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Study on the effect of idle start-stop technology on fuel consumption and particle number emission of GDI vehicle |
HU Zhi-yuan1, FU Jia-ming1, HAN Wei-wei2, QUAN Yi-feng2 |
1. School of Automotive Studies, Tongji University, Shanghai 201804, China;
2. Shanghai Motor Vehicle Inspection Certification & Tech Innovation Center Co., Ltd, Shanghai, 201805, China |
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Abstract In this paper, a gasoline direct injection (GDI) vehicle certified to meet China V emission standard equipped with idle start-stop system was taken as the research object. By using the chassis dynamometer test system, the full-flow dilution sampling system and the particle number measurement system, the paper aimed to study the effect of idle start-stop system on fuel consumption and particle number emission of GDI vehicles, as well as the effect of start temperature and testing cycles. The results showed that the fuel consumption of the test GDI vehicle with idle start-stop system on decreased by 5.1% and the emission of particles number increased by 16.7% under the NEDC cold-start condition. In the case of warm-start, the fuel consumption decreased by 7.3% and the emission of particles number increased by 9.3%. Under WLTC warm-start condition, the fuel-saving effect of idle start-stop system was less notable, when fuel consumption only decreased by 1.7% and the emission of particles number also just increased by 6.2%. The idle start-stop system was beneficial to lower fuel consumption, while it was not conducive to the control of the particle number emission.
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Received: 02 August 2019
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