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在异质的交通条件下,汽车车 (3 轮车) 的真实世界尾气排放

Sudheer Kumar Kuppili¹, Anjana K², Dheeraj Alshetty²

¹Environmental and Water Resource Engineering Division, Department of Civil Engineering, Indian Institute of Technology, Chennai, 600 036, India. sudheer.vm001@gmail.com.

Environmental monitoring and assessment

|December 3, 2023

概括

压缩天然气 (CNG) 汽车车的实际排放超过了印度标准 (BS) 的标准,驾驶模式显著影响了污染水平. 加速和减速阶段占总排放量的70%以上.

科学领域:

环境科学环境科学
汽车工程汽车工程
控制污染控制污染控制污染

背景情况:

三轮式汽车车在许多城市地区,特别是印度,是重要的交通方式.
压缩天然气 (CNG) 被推广为更清洁的燃料替代品,但其实际排放需要彻底调查.
现有的研究往往侧重于实验室条件,需要研究实际的道路排放性能.

研究的目的:

为量化CNG驱动的三轮式汽车车的真实废气排放量.
确定影响排放率的关键驾驶参数,包括速度,加速度,空气-燃料比率和每分钟发动机转速 (rpm).
为了将测量的排放量与BS-III和BS-IV车辆的Bharat标准 (BS) 进行比较.

主要方法:

在德里使用便携式废气排放测量系统 (AVL Ditest Gas 1000) 进行了道路排放测量.
测试的车辆包括符合印度标准BS-III和BS-IV的自动车.
与排放测量同时收集速度,加速度,空气-燃料比率和rpm的数据.

主要成果:

碳一氧化物 (CO),碳化合物 (HC) 和氧化物 (NO) 的平均排放率分别为0.015 ± 0.017 g/s,0.003 ± 0.0017 g/s和0.007 ± 0.005 g/s.
对CO (3.98g/km) 和HC+NO (3.93g/km) 的排放因子值是BS-III和BS-IV排放标准的1.4-3.2倍.
受交通影响的驾驶模式,驾驶员行为 (加速/减速) 和车辆特性,显著影响了排放. 空气-燃料比率与排放率有很高的相关性.

结论:

气汽车车,特别是在加速和减速阶段 (占排放量的70%以上),明显超过了监管排放标准.
驾驶行为和交通状况是确定真实世界的排放的关键因素,突出了优化驾驶策略的必要性.
排放率因速度而异,在每小时20-30公里范围内观察到较高的排放量,在每小时40-50公里范围内观察到较低的排放量,这表明减少污染的特定运行窗口.

关键词:

汽车车表演汽车车表演压缩天然气压缩天然气.排放因子排放因子气体污染物气体污染物即时的排放即时的排放.在船上进行测量.现实世界的排放监测.

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