RESEARCH OPERATIONAL RELIABILITY TURBOCHECKPRESSORS TO 27-145 VEHICLES OF KAMAZ 65115
The basis for increasing the unit capacity of trucks and tractors is the use of turbocharging. At the same time, the statistics of the number of turbocharger failures indicates a sharp increase. The averaged data of a number of authors give a figure of 5-15% of the failures from all engine failures. The reason for the increase in the number of failures is a high stochastic operating modes of the machines, violation of engine shutdown conditions, etc. A significant reduction in the number of failures allows the use of an autonomous lubricating and braking device in the lubrication system. Operational testing of 15 KamAZ 65115 cars with KamAZ 740.63.400 engine equipped with K 27-145 turbochargers showed that with a 95% nominal lubrication system the confidence interval was [70520; 82545] km. After installing an autonomous lubricating and braking system in the lubrication system of the turbocharger, the 95% confidence interval was [173452; 183801] km. The value of the mean time between failures after the installation of an autonomous lubricating-braking device exceeds by 2.33 times the average operating time for failure with a regular lubrication system. At the same time, 95% confidence intervals do not overlap.