摘要
采用短行程随机组合、短行程状态转移、驾驶模式片段状态转移和速度状态转移法分别建立和比较城市特征驾驶工况。以成都市为例,设计实验测量车辆实际运行参数。测量在选定的起终点间的5条行驶路线上进行。利用引擎扫描仪和GPS采集汽车行驶数据,并对其数据进行处理。特征驾驶工况选择依据是所建候选工况与实测工况在评价参数间的最小差异而定。特征驾驶工况按速度分布、速度-加速度频率分布(SAFD)、汽车比功率(VSP)分布比例及排放预测进行比较。4个特征驾驶工况与实际工况的平均相对误差如下:速度分布分别为17.4%、11.3%、13.9%、25.5%;SAFD在50%左右;VSP分布分别为19.1%、18.5%、23.4%、29.4%;而排放预测均在3%以内。结果表明采用短行程状态转移建立的特征驾驶工况较其它3种方法更接近实际测量。
Random selection of micro-trips, micro-trips clustering change based approach, driving mode of time series change based approach and speed change based approach were used to develop a city-specific driving cycle and then compare the results. Taking Chengdu, Sichuan Province as an example, experiments were designed and carried out to measure the vehicle operational parameters during real-world driving duties. Five routes for a given origin/destination （O/D） pair were selected for real-world measurements using a passenger car equipped with an engine scanner and a global positioning system（ GPS ）. A data post-processing procedure was developed for error-checking and manipulation of collected data. The representative driving cycle was selected from a candidate pool of driving cycles based on the minimum sum of the absolute value of relative differences （RD） of several preselected evaluation parameters between the developed cycles and the real-world measurements. Percentages for speed bins, speed acceleration frequency distribution （SAFD）, vehicle specific power （VSP） bins and emissions were compared among 4 selected city-specific driving cycles. Average RD between developed driving cycles and real-world measurements for speed bins under 4 driving cycles were 17.4%, 11.3%, 13.9%, 25.5% respectively; SAFD were all around 50%; VSP bins were 19.1%, 18.5% ,23.4% ,29.4% respectively, and emissions were all less than 3%. Results indicated that the micro-trips change based approach performs better than the other approaches in terms of preselected evaluation parameters.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第1期148-154,共7页
Environmental Science & Technology
基金
四川大学人才引进启动基金(JS20100324507093)
教育部新世纪人才支持计划(2011SCU-NCET-10-0578)
关键词
驾驶工况
特征驾驶工况
短行程
驾驶模式
driving cycle
city-specific driving cycle
micro-trips
driving mode
