Grigorov A. The increasing of efficiency of buses operation by optimization of motor oils change terms

Object of research - a process of oils quality change at operation of buses. Subject of research - increasing of efficiency of buses operation by optimization of motor oils replacement terms. The purpose of research - increasing of efficiency of buses operation by optimization of motor oils replacement terms by the control of their quality over parameter of an increment of dielectric permeability. Methods of research. During studying a condition of a question on a theme of dissertational work, the method of the analysis was applied; at theoretical researches - an analytical method which is based on fundamental laws of physics, mechanophysics, materiology; at carrying out of laboratory and operational researches - experimental methods with application of modern techniques established in state standard and state standard of Ukraine. Processing of the received results was carried out by using of mathematical statistics methods. Theoretical and practical results: the dependence between standard parameters of quality of oil and size of dielectric permeability is established on base of which its limiting value is determined, and the method of definition of rational motor oil replacement term is offered; the received dependences and the offered method allow increasing efficiency of use of buses during operation. Scientific novelty of the received results. For the first time for buses: influence on dielectric permeability of motor oils of products of deterioration of rubbed details, fuel and products of its incomplete combustion, a cooling liquids, dust particles contents is determined; dependence between such parameters of oil quality as the contents of water, acid number and size of an dielectric permeability is established, on the basis of which limiting value of dielectric permeability is determined; laws of change of size of an oil dielectric permeability are received depending on term and conditions of the bus operation, quantity of oil added in system of greasing the engine. Level of introduction: substantive provisions of dissertational work are accepted to introduction on OAS "KMTE-16330 ", test laboratory "Universaloilchem" and in educational process of National technical university "Kharkov polytechnic institute" for the working program of discipline "Physics and chemistry fuels, oils, greasing". The sphere of application is vehicle exploitation, overhaul and repair.