Kostyunik R. Informational - test tribological system with stabilized contact pressures.

The scientific - practical problem of increasing the reliability of an estimation of the results of tests on antiwear and antifrictional properties of commodity and developed lubricants and especially superefficient additives to them is considered. As a result of studying the processes of the formation of secondary structures on the working surfaces in tribosystems it is revealed and experimentally confirmed, that instability of instant contact pressure in a zone of contact defines the tribological characteristics of secondary structures (SS). It is shown, that instability of actual width of linear contact defines its thermal stress and, accordingly, intensity of wear process of the tribosystem as a whole. The mathematical acknowledgement of concerning dependence of thermal stress from the actual area of contact is resulted. Displacement of contact and redistribution of axial loading is experimentally revealed at tests of superefficient additives, by the example of mixtures with substances organizers of non - adhesion friction (SONF). On the basis of the formulated requirements to the unit of friction it is developed and created the new informational - test tribological system with essentially new loading circuit and constant instant contact interaction which has allowed to define in laboratory conditions the optimum concentration of additives SONF in commodity oils on peak efficiency, namely on the minimal intensity of wear process with the account of tribological characteristics of SS. Key words: Instant contact pressure, intensity of wear process, a tribosystem, secondary structures.