基于耐久老化车辆的实际道路行驶NO x 排放控制方法研究

doi:10.19562/j.chinasae.qcgc.2023.04.015

Abstract

Abstract:

In order to meet the RDE （real driving emission） sampling requirements of 160，000 km in-use vehicles stipulated in China 6 emission regulations， the aggressive RDE test cycle on test bench is carried out on two durable aging vehicles under the critical environment of 1 ℃. By adjusting the engine control strategies， the operation parameters of two extreme working conditions with high NO _x emission are optimized： rapid acceleration after cold start and rapid acceleration to super high vehicle speed after hot start， then the comparative verification tests between the new and old strategies in variable emission combinations include roller cycles and RDE are carried out. The results show that the VVT， excess scavenging coefficient， lambda target value and aging catalyst window control have great impact on NO _x emission of durable aging vehicle under cold and hot engine’s high load conditions. Appropriate control strategies can reduce the total NO _x emission by more than 40%. It is an effective RDE development method to firstly carry out the emission development based on durable aging vehicles under aggressive RDE cycle， and then validate it on the real road.

Key words: RDE, NO _x emission control, durable aging, PEMS, catalyst window

Shenglong Xu,Jun Song,Wei Yuan. Research on NO _x Emission Control Method of Real Driving Based on Durable Aging Vehicle[J].Automotive Engineering, 2023, 45(4): 663-671.

Figures/Tables 27

References 15

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车型	发动机			变速器	整备质量/kg
车型	类型	功率/kW	转矩/（N·m）	变速器	整备质量/kg
A	1.4TSI	110	250	DCT	1 380
B	1.4TSI	110	250	DCT	1 565

催化器			颗粒捕集器（GPF）
目数	载体	贵金属	目数
600	堇青石	Pt， Pd， Rh	300

序号	设备名称	型号	生产厂
1	耐久试验底盘测功机	EMS-CD48L 2WD	HORIBA
2	排放试验底盘测功机	EMS-CD48L 2WD COLD	HORIBA
3	排放采样分析仪	i60	AVL
4	车载排放测试系统	M.O.V.E	AVL

曲线	时长/s	最高车速/（km·h^-1）	平均车速/（km·h^-1）	最大正/负向加速度/（m·s^-2）
1	2 712	145	36	2.2/-2.5
2	5 716	142	50	3.2/-2.9
3	5 540	132	49	2.8/-3.4

曲线	参数	v·apos/（m²·s^-3）
曲线	参数	市区	郊区	高速
1	法规限值	17.95	24.58	27.75
	95%分位	18.05	36.3	30.61
	100%分位	39.74	42.05	33.89
2	法规限值	19.16	24.54	27.59
	95%分位	16.19	23.23	27.07
	100%分位	31.88	40.15	40.91
3	法规限值	18.94	24.77	26.53
	95%分位	13.58	21.65	20.67
	100%分位	23.16	40.51	42.82

Research on NO _x Emission Control Method of Real Driving Based on Durable Aging Vehicle

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Research on NO x Emission Control Method of Real Driving Based on Durable Aging Vehicle

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Research on NO _x Emission Control Method of Real Driving Based on Durable Aging Vehicle