The article presents the results of analysis of failures of low-floor urban buses LiAZ-529221, LiAZ-529222, LiAZ-621321 and LiAZ-621322 in the conditions of operation in Moscow. The research was based on the statistical data collected on failures of the bus modifications under consideration for the period from 01.08.2017 to 31.12.2018. As a result, the causes of failures of systems, assemblies and units, their seasonality, development of recommendations to improve the maintenance and repair system of LiAZ buses were identified. The research was carried out on the base of the branch of SUE “Mosgortrans”.

The issue of maintenance and repair management of fleet in a bus transit agency consisting of several branches is presented in the article. Technical base development takes place due to increasing of effectiveness as a result of specialization and cooperation of maintenance and repair, as well as using maximum potential, reducing and optimal costs allocation. The minimum total reduced cost was taken as a criterion for the efficiency of production placement, focusing on the costs associated with the choice of specialization and subsequent cooperation of maintenance (mainly the costs of transportation of units and vehicles between the branches). The management approach of cooperating in the issue of maintenance and repair of buses is aimed at the distribution of a particular type of work between the technical bases of different branches of the united transit agency. The applied method is based on the common approach to the solution of the “transport problem” and adapted specifically for the united transport company involving two and more separate branches. The method was tested on the united agency operating urban buses in Moscow, aiming to allocate fleet maintenance with regard to its needs and resources.

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.

No abstract

This paper substantiates the need for a procedure for warming up buses in motor transport enterprises engaged in passenger transportation, and the procedure for its implementation. The necessity of regulation of fuel consumption for heating is determined. A comparative analysis of existing methods and means of measuring fuel consumption for use in the regulation of fuel consumption for heating in motor transport enterprises engaged in passenger transportation is carried out. A schematic diagram of a device of its own design based on a fuel level sensor for measuring fuel consumption for heating is proposed. Methodical recommendations on the regulation of fuel consumption for heating with the help of the device are given. The procedure for processing statistical data is described in detail. The process of standardizing fuel consumption for warming up the LiAZ-429260 bus at the State Unitary Enterprise “Mosgortrans” is described. The results of standardization of fuel consumption for heating are shown.