Tribology for construction and maintenance of machines and technical devices

A significance of tribology for construction and maintenance of machines, particularly in motorization, is discussed in the paper. Examples on negative and positive effects of friction are given. An attention has been paid to opportunities of preventing negative friction effects, based on tibological knowledge which should be used not only in an operation process of technical equipment but also in the phase of their design. A close relationship between the development of tribology, a safety level and economics of machines operation, especially motor vehicles, is emphasized. The DT-12 Scania internal-combustion engine as an example of complex tribological system, the Audi Q7 car AL 420-6A six extension automatic gear transmission as an example of complex tribological system, the rolling friction power as a vehicle driving power, economical effect of 15W/40 oil replacement with OW/30 oil, the logical model of piston - cylinder set in a dynamic state are presented in the paper.