RPA对PFI轻型汽油车RDE高原排放特性试验研究

doi:10.19562/j.chinasae.qcgc.2018.012.004

Abstract

Abstract: To explore the influence of RPA (Relative Positive Acceleration) factor on emission characteristics of PFI (Port Fuel Injection ) gasoline vehicles in the RDE (Real Driving Emission) test, RDE emission tests are carried out on an electronically controlled inlet multi-point injection gasoline vehicle using the AVL-M.O.V.E. PEMS(Portable Emission Measurement System)under gentle, normal and intense driving behaviors in Xining high-altitude region respectively, and the gasoline engine is not modified during the tests. The results show that the driving behaviors of different RPA values which are within a large range according to the national standard directly affect the results of the RDE emission test. The cold starting stage of RDE test has great influence on PN and CO emission, with greater influence on PN than on gas pollutants. The variation of CO and PN emission with RPA value is not obvious; however, NO_x and CO₂ emissions are positively correlated with RPA values. CF (NO_x)>CF (CO)>CF(PN), and the change amplitude of CF (NO_x) is significantly increased with the increase of RPA value, thus NO_x emission should be paid attention to during RDE test under the plateau condition. The RPA affects the distribution of CO₂ emission on the characteristic curve. The larger the RPA value, the closer distribution of CO₂ emission on the characteristics curve to the upper tolerance

Key words: light gasoline vehicle, RPA, real driving emission (RDE), high-altitude region emission characteristics

Cheng Liang, Xu Zhiyin, Wu Jianhua, Qiu Xiaowei, Xie Xijun. An Experimental Study on the Influence of RPA on High-Altitude Region Emission Characteristic of RDE Test for PFI Light Gasoline Vehicle[J]., 2018, 40(12): 1398-1404.

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An Experimental Study on the Influence of RPA on High-Altitude Region Emission Characteristic of RDE Test for PFI Light Gasoline Vehicle

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