• 关键词：实际行驶排放  道路坡度  动力学参数  累计正海拔增量

• 基金项目：重庆市技术创新与应用发展项目（No. cstc2019jscx-msxmX0016）

• 张小奇
• 重庆大学 机械与运载工程学院，重庆 400044

• 李阳
• 重庆大学 机械与运载工程学院，重庆 400044

• 杜宝程
• 重庆大学 机械与运载工程学院，重庆 400044;中国汽车工程研究院股份有限公司，重庆 401122

• 张力
• 重庆大学 机械与运载工程学院，重庆 400044

• 陈凌建
• 重庆大学 机械与运载工程学院，重庆 400044

• 徐划龙
• 中国汽车工程研究院股份有限公司，重庆 401122

• 摘要：为研究丘陵道路特征对实际行驶排放（RDE）试验中污染物排放和动力学特性校验的影响，本文利用一辆轻型汽油车，在重庆地区满足国六排放法规要求的4条不同道路特征的路线上各进行了两次RDE试验.结果表明：CO₂与道路坡度呈显著线性相关，坡度每增加1%，CO₂排放因子平均增加22.4%，CO和PN则与道路坡度呈二次多项式关系，NO_x与坡度无明显相关性.从移动平均窗口层面对比考虑坡度的VSP_pos［95］ （路段中正比功率升序排列的第95个百分位值）和不考虑坡度的v·a_pos［95］（速度与正加速乘积升序排列的第95个百分位值）与PN的关系，发现窗口VSP_pos［95］和v·a_pos［95］与PN的二次拟合R²平均值分别为0.93和0.72，当窗口累计正海拔增量大于600 m/100 km时，VSP_pos［95］与PN的相关性明显优于v·a_pos［95］，建议在累计正海拔增量大于600 m/100 km的丘陵地区使用VSP_pos［95］进行RDE动力学特性校验.该研究可对丘陵地区生态驾驶普及和国六法规中RDE试验行程动力学边界条件在丘陵地区的适应性提供参考.

• Abstract：Vehicle emission and dynamic characteristics are significantly influenced by road conditions. This work investigates the real driving emission （RDE） of a light gasoline vehicle on four different road characteristics in Chongqing according to China VI vehicle emission standards. The results show that there is a strong linear correlation between CO₂ and road slope. When the slope increases by 1%， the CO₂ emission factor increases by 22.4% on average. CO and PN show a quadratic polynomial relationship with road slope， while no clear correlation was observed between NO_x and the slope. The relationship between PN and VSP_pos［95］ （the 95th percentile value of the ascending order of positive vehicle specific power in the road section） considering slope and v·a_pos［95］（the 95th percentile value of the ascending order of the product of speed and positive acceleration） without considering slope was compared from the moving average window level. To be more specific， VSP_pos［95］ and PN shows an average coefficient of 0.93 while v·a_pos［95］ and PN displays an average coefficient of 0.72. Nevertheless， the coefficient differences of aforementioned parameters become remarkable when the cumulative positive elevation incremental window goes beyond 600 m/100 km. Therefore， VSP_pos［95］ is suggested to verify the dynamic characteristics of RDE in hilly areas where the cumulative positive elevation increment is greater than 600 m/100 km. The presented study in this paper light on the popularization of ecological driving in hilly areas and the adaptability of RDE dynamic boundary conditions in hilly areas.

• Key words：real driving emission  road slope  dynamics parameters  cumulative positive elevation increment

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