Parameter relationship between exhaust emissions and driving behaviors for commercial heavy-duty vehicles

doi:10.3969/j.issn.1674-8484.2023.03.012

Abstract

Abstract:

The exhaust emissions were analyzed for commercial heavy-duty vehicles to reduce exhaust emissions with ecological driving behavior. Five exhaust emissions, namely CO₂, CO, NO_x (nitrogen oxides), THC (total hydrocarbon), and PM (particulate matter), were measured at different speeds and operating conditions; The influence of abnormal driving on emissions were also analysed. The cumulative average value of the data clustered according to the speed was used to divide the model construction interval. The speed, acceleration and Vehicle Specific Power (VSP) were selected as the independent variables of the emission model. Ternary linear regression equations were constructed to reflect the relationship between driving behavior and emissions. The results show that the multiple decision coefficients of the prediction equations are more than 0.5, and the prediction data passes the paired T test; In emission prediction equations, the acceleration has a significant impact on five exhaust emissions. Suggestions on reducing pollutant emissions, optimizing driving behaviors, and ecological driving behaviors are put forward.

Key words: vehicle exhaust emissions, ecological driving behaviors, heavy-duty vehicles, regression analysis, vehicle specific power (VSP)

CLC Number:

XU Ting, CHEN Shuyi, PENG Chong, CHEN Yixin, LIANG Zekai, ZHAO Lei. Parameter relationship between exhaust emissions and driving behaviors for commercial heavy-duty vehicles[J]. Journal of Automotive Safety and Energy, 2023, 14(3): 365-374.

Figures/Tables 17

References 21

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参数配置	试验车辆	验证车辆
最大功率/ kW	180	221
对应转速/ (r·min^-1)	2 300	1 900
最大扭矩/ kNm	0.950	1.390
对应转速/ (r·min^-1)	1 400	1 200~1 500
排量/ L	6.700	9.726
整备质量/ t	9.00	12.20
总质量/ t	25.00	31.00
整车长度/ m	9.24	11.97
整车宽度/ m	2.50	2.55
整车高度/ m	3.03, 3.60, 3.69	3.95

参数配置	试验车辆	验证车辆
最大功率/ kW	180	221
对应转速/ (r·min^-1)	2 300	1 900
最大扭矩/ kNm	0.950	1.390
对应转速/ (r·min^-1)	1 400	1 200~1 500
排量/ L	6.700	9.726
整备质量/ t	9.00	12.20
总质量/ t	25.00	31.00
整车长度/ m	9.24	11.97
整车宽度/ m	2.50	2.55
整车高度/ m	3.03, 3.60, 3.69	3.95

工况类型	工况定义
怠速	v < 0.5 km/h，\|a\| < 0.15 m/s²。
匀速	v > 0.5 km/h，△v < 1 km/h，\|a\| < 0.15 m/s²。
加速	整体为加速，区间内允许不大于1 s的匀速。
减速	整体为减速，区间内允许不大于1 s的匀速。

工况类型	工况定义
怠速	v < 0.5 km/h，\|a\| < 0.15 m/s²。
匀速	v > 0.5 km/h，△v < 1 km/h，\|a\| < 0.15 m/s²。
加速	整体为加速，区间内允许不大于1 s的匀速。
减速	整体为减速，区间内允许不大于1 s的匀速。

速度分类	v /（km·h^-1）
速度分类	聚类中心值	区间值
低速	14	[0，28)
中速	55	[28，80)
高速	105	[80，130)