METHOD AND STAND FOR DETERMINING THE RESOURCE OF MOTOR OIL IN THE ENGINE
In the course of work motor oil is affected by various factors therefore it loses the operational properties. It is established that in the course of operation of the engine engine oil is exposed to hydrodynamic, thermodynamic and thermochemical influence. On the basis of the carried-out patent and information search shortcomings of the existing ways and means of a research in vitro of the main operational properties of engine oil are revealed and the design of the stand in which the operating conditions of engine oil as close as possible to real are created is offered. As criterion for evaluation of a resource of engine oil serves the generalized indicator considering key indicators of quality of engine oil which are determined by standard techniques. Settlement and theoretical justification of recalculation of quantity of cycles of work of installation on car mileage is executed. The predicted car mileage is defined by technical and operational indicators of work of the car and duration of the modes of test of engine oil in installation. As a result of the conducted research of process of aging of engine oil of the M-10-G2 brand at the laboratory stand have defined his resource corresponding to the car mileage of 14 thousand km. Laboratory installation allows to reproduce processes of change of hydrocarbonic composition of engine oil with reliability of 95%. Calculation of number of cycles of work of laboratory installation and determination of size of car mileage in actual practice gives to operation the chance to predict process of change of operational properties of engine oil and to determine the car mileage at which the value of oil is exhausted and by that to recommend to make timely replacement of engine oil in the engine.Keywords: engine oil, engine, oil resource, frequency of replacement of oil, laboratory installation, work imitation, thermodynamic, hydromechanical and thermochemical influences, car mileage.