| Summary: | Problem. Under operating conditions, the durability of vehicles is estimated by the resource, which also depends on the frequency of maintenance. The disadvantage of the current system of maintenance and repair of vehicles in Ukraine is the lack of a mechanism for adjusting the frequency of technical impacts depending on the traffic conditions of vehi-cles’ movement. However, in Ukraine there is a methodology of fuel rationing, which adjusts the consumption to the operating conditions. Goal. The purpose of the study is to determine the impact of fuel consumption on the resource and frequency of car maintenance. Methodology. Mathematical modeling is used to obtain analytical formulas that relate the resource to fuel consumption. Results. It is suggested that the resource and frequency of maintenance be adjusted on the same principles as those used to adjust fuel consumption. The deviation of the actual fuel consumption from the standard value can be obtained experimentally or using the adjustment factors specified in the methodology for rationing fuels and lubricants. On the example of KrAZ-6322 the calculations of resource and fuel consumption were carried out and graphic dependences of changing indicators on the average speed of the vehicle were received. The values of fuel consumption and resource change for the five categories of roads were calculated. To make the application of the method easier, the coefficients of the resource change and the change of fuel consumption were introduced, and a graphical dependence of thee coefficients’ change was obtained. Originality. According to the mathematical model, you can calculate the mileage before major repairs, which information the manufacturer does not usually indicate. In this case, the input parameters are the technical data provided by the manufacturer in the public domain. Practical value. The recommendations were developed for changing the frequency of maintenance and service life of vehicles according to the information contained in the travel documentation that accompany the transportation of goods or passengers. A suggestion was made to create a computer software that automates the process of collecting and processing the overall information.
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