WMTC,which means a worldwide motorcycle testing cycle,is now regarded as the most possible choice for the global motorcycle emission testing cycle,but whether or not it can be used in China is still unknown.In this st...WMTC,which means a worldwide motorcycle testing cycle,is now regarded as the most possible choice for the global motorcycle emission testing cycle,but whether or not it can be used in China is still unknown.In this study,a large number of data on the speed-time trace of motorcycles were sampled from various kinds of roads in 5 cities in China.Based on a series of criterion numbers defined,the driving character of motorcycles in the real-road conditions of China was obtained.With the aid of a specially designed program,an emission testing cycle that can indicate the driving characteristics of motorcycle in the real-road conditions was synthesized,and the exhaust emission tests of 20 motorcycles under the synchronized cycle and WMTC were carried out based on a CVS system and a motorcycle chassis dynamometer.The results show that although there do exist differences in some criterion numbers between the real-road condition and WMTC,such as proportion of idling mode,mean speed,mean running speed and the average acceleration and deceleration rates,the driving behaviors are similar.The results of exhaust emission tests indicate that the emission values of motorcycles under the synchronized cycle and WMTC have a relatively strong correlation.This means that WMTC can be introduced as a standard motorcycle emission test regulation into China.展开更多
为考察WMTC(world-wide motorcycle test cycle)排放测试循环在中国的适应性,利用在天津和济南所采集的摩托车实际行驶的路谱数据,基于自行设计的准则数评价体系,建立了表征中国摩托车道路行驶特征的排放测试循环.研究结果表明,合成循...为考察WMTC(world-wide motorcycle test cycle)排放测试循环在中国的适应性,利用在天津和济南所采集的摩托车实际行驶的路谱数据,基于自行设计的准则数评价体系,建立了表征中国摩托车道路行驶特征的排放测试循环.研究结果表明,合成循环的各种模式比例特征与WMTC比较接近,但各种速度特征,包括最高车速和各种模式的平均速度及总体平均速度则存在明显差异.两种摩托车的测试循环表明合成循环的HC和CO排放因子高于WMTC测试循环,但是其NOx的排放因子却小于WMTC测试循环.同时,为给出WMTC测试循环对中国实际道路行驶特征的适应性的明确结论,大规模的针对不同城市不同实际道路行驶路谱数据的采集分析是必要的.展开更多
基金Supported by Tianjin Municipal Science and Technology Commission(No.05YFJMJC11100and No.07JCYBJC03900)Ministry of Education of China(No.20020056046).
文摘WMTC,which means a worldwide motorcycle testing cycle,is now regarded as the most possible choice for the global motorcycle emission testing cycle,but whether or not it can be used in China is still unknown.In this study,a large number of data on the speed-time trace of motorcycles were sampled from various kinds of roads in 5 cities in China.Based on a series of criterion numbers defined,the driving character of motorcycles in the real-road conditions of China was obtained.With the aid of a specially designed program,an emission testing cycle that can indicate the driving characteristics of motorcycle in the real-road conditions was synthesized,and the exhaust emission tests of 20 motorcycles under the synchronized cycle and WMTC were carried out based on a CVS system and a motorcycle chassis dynamometer.The results show that although there do exist differences in some criterion numbers between the real-road condition and WMTC,such as proportion of idling mode,mean speed,mean running speed and the average acceleration and deceleration rates,the driving behaviors are similar.The results of exhaust emission tests indicate that the emission values of motorcycles under the synchronized cycle and WMTC have a relatively strong correlation.This means that WMTC can be introduced as a standard motorcycle emission test regulation into China.
文摘为考察WMTC(world-wide motorcycle test cycle)排放测试循环在中国的适应性,利用在天津和济南所采集的摩托车实际行驶的路谱数据,基于自行设计的准则数评价体系,建立了表征中国摩托车道路行驶特征的排放测试循环.研究结果表明,合成循环的各种模式比例特征与WMTC比较接近,但各种速度特征,包括最高车速和各种模式的平均速度及总体平均速度则存在明显差异.两种摩托车的测试循环表明合成循环的HC和CO排放因子高于WMTC测试循环,但是其NOx的排放因子却小于WMTC测试循环.同时,为给出WMTC测试循环对中国实际道路行驶特征的适应性的明确结论,大规模的针对不同城市不同实际道路行驶路谱数据的采集分析是必要的.
