Methods of determining the correction coefficients of specific norms of spare parts consumption depending on fleet age

Abstract

The article considers changes in requirements for spare parts for maintenance and ongoing repair of urban buses taking into account their mileage from the beginning of operation. The research was carried out with the purpose of development of a technique that would help one to determine coefficients of correction made to specific norms of consumption of spare parts for various age groups of buses on the basis of changes in their failure flow. Correction factors were calculated for the four selected age groups of buses. In addition, the article considers the issue of reducing the annual mileage of the public transit bus while increasing its service lifetime. The methodology was tested on taking LiAZ-529222 and LiAZ-621322 urban buses as an example, operated in Moscow. As a result of the performed calculations, values of coefficients of correcting the consumption of spare parts have been obtained for the considered modifications of buses in each age group.