进入21世纪以来,中国汽车的保有量迅速增长,到2000年汽车保有量已达1 580万辆,2002年汽车保有量近2 053万辆,中国汽车保有量将以不低于16%的速度增长,而其中营运性运输车辆占42%以上。这些车辆的性能好坏直接影响到交通的安全性、经济性,关系到公路运输效率,因此,车辆的性能即车辆的技术状况是不可忽视的问题。1 车辆技术状况下降导致的问题(1) 能源问题。石油,是工业的动脉 Since the beginning of the 21st century, the number of cars in China has increased rapidly. By the year 2000, the number of cars reached 15.8 million. In 2002, the number of vehicles held was nearly 20.53 million. The number of vehicles in China will be no less than 16% Growth, of which more than 42% of transport vehicles. The performance of these vehicles has a direct impact on traffic safety, economy, related to the efficiency of road transport, therefore, the performance of vehicles that is the technical status of the vehicle can not be ignored problem. 1 vehicle technical conditions caused by the decline of (1) energy issues. Oil is the artery of industry