Characteristics of Dynamic Parameter and Validation Rationality of RDE Test for LightDuty Vehicle

MA Zhilei; HE Chao; LI Jiaqiang; LIU Xueyuan

Vehicle Engine ›› 2022, Vol. 0 ›› Issue (1) : 78-85.

MA Zhilei¹^,2,HE Chao¹,LI Jiaqiang¹,LIU Xueyuan^1,2

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Abstract

In order to study the characteristics of dynamic parameters and the influence of different altitudes on window normality verification, RDE test was carried out 12 times according to the China Ⅵ emission legislation of lightduty vehicle. The results show that v·a_pos_［95］ increases and RPA decreases with the increase of vehicle speed. v·a_pos_［95］ is acquired according to the 95th percentile, which cannot represent the overall law of v·a_pos for each speed group. The percentile for value obtaining hence should move forward. WLTC cycle is more intense than RDE test according to dynamic parameters. Using 1.2 coefficient to calculate P1 point for normal verification of urban window will make the baseline so high as to decrease the pass rate of verification. In the verification of suburban and highspeed windows at high altitude, the coefficient used in calculating P2 and P3 points should decrease.

Key words

light-duty vehicle / real driving emission / dynamic parameter / altitude / window normality verification

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MA Zhilei,HE Chao,LI Jiaqiang,LIU Xueyuan. Characteristics of Dynamic Parameter and Validation Rationality of RDE Test for LightDuty Vehicle[J]. Vehicle Engine. 2022, 0(1): 78-85