Abstract
Based on a vast amount of actual data, this paper gives the statistical laws of operational fault of typical medium-duty trucks made in China by means of mathematical statistics and the theory of reliability. This paper also gives the fault density function ) (l f ,the fault distribution function ) (l F ,the reliability function ) (l R and the fault rate function ) (l l . At the same time, estimated values of some characteristic volumes of the reliability are calculated, and some conclusions of very important significance are got correspondingly. So the research of this paper provides basis for keeping abreast of the present condition of the medium-duty trucks made in China in depth, and improving their reliability. In addition, the study of this paper will make things convenient for the medium-duty trucksoperation and repair and maintenance units to keep abreast of the technical condition of operation and the use reliability of the trucks in time, and to arrange the repair and maintenance of the trucks reasonably.