THE PROBLEM OF CONTAMINATION OF ENGINE PARTS

This article considers the problem of formation of deposits on the parts of internal combustion engines. Describes the main types of deposits in engines and reasons for their formation. The analysis of influence of oxidation of motor oils on the technical condition of internal combustion engines. The author offers a brief description of the program-methods of laboratory research of engine oils, including the evaluation of changes in properties of motor oils in contact with different concentrations of diesel fuels

CHANGING CHARACTERISTICS OF MOTOR OILS IN GAS ENGINES OF GREAT POWER

The article presents the results of studying the characteristics of engine oil G-Profi PSN 40, designed for use in gas engines of power plants fitted to mine. It reflects the issues of the changing characteristics of the engine oil during use and determine the frequency of their replacement. Examines the changing characteristics of engine oils as kinematic viscosity, base number, acid number, and also evaluated the tribological properties of the content of wear products. The conclusions about the feasibility of using the investigated engine oil

THE INFLUENCE OF THE APPLICATED ON THE FILTERING PAPER MOTOR OIL QUANTITY ON ITS INDICATORS’ EVALUATION

The most common method of controlling the motor oil detergent-dispersant properties is the «drop sample» method (the applying process of the engine  oil drop to the filter paper -»blue tape» and the calculating process of the  drop sample with an oil stain characteristics). The characteristic zones’ size and the entire oil stain depends on the engine oil condition, but the  amount of applied engine oil is affected to the large extent by the size of the  oil stain. The stability of the oil droplet mass increases the monitoring  accuracy of the engine oil. The article clarifies how much the motor oil  droplet mass varies when applied by the same way. The simple and low-cost  products are used to apply the motor oil drop. The evaluation is carried out  by measuring the certain number of drops masses on high-precision scales.  The errors which occur when the engine oil drop is applied to the filter  paper-»blue tape» and their influence on the final result are estimated. The  conclusions about the significance of the motor oil droplet mass changing which could influence on the characteristic zones’ size of the drop sample are made