Modernization of the Turbocharger Lubrication System of an Internal Combustion Engine

AbstractOne of the most widespread methods to increase the power of internal-combustion engines (ICEs) is turbocharging. But turbochargers used for 70% of engines have a number of essential disadvantages: their low service reliability as up to 30% of engine failures are caused by turbochargers; their high price; their cost-demanding reconditioning caused by high labour inputs and considerable downtime periods of machine-tractor units; losses due to long downtime periods of machine-tractor units. ICE life reducing usual for those equipped with turbochargers is due to frequent high-temperature overloads abnormal for turbochargers. To reduce the thermal factor of turbocharger elements and the running-out durability can be possible when using a hydraulic accumulator and a braking device. Thus, a test bench is manufactured for examining the turbocharger with the proposed elements. As a result, we manage to avoid semidry and dry friction to extend the turbocharger life, with the rotor slowing time being reduced on average up to 30–35% as compared with the normal (load-free) rotor slowing time. Thus, a hydraulic accumulator combined with a braking device can reduce turbocharger failures up to 10–15%