System for providing continuous lubrication to engine turbocharger shaft and bearing arrangement

A lubrication system for turbocharger(s) to ensure continuous lubrication of bearings and shaft of the turbocharger with lubricant retention during start and shut down of turbocharger-associated systems comprising

• a turbine housing, a compressor housing, and a bearing housing disposed between the turbine and compressor housings, with the turbine housing and compressor housings held on either side by a connecting means,
• a turbine wheel mounted on a shaft in a turbine housing wherein the shaft extends through the bearing housing (4) into the compressor housing,
• a compressor wheel in the compressor housing mounted at the distal end of the shaft and is supported in the bearing housing,
• a pair of floating journal bearings on either end of the bearing housing to support the rotating shaft,
• seals at the both ends of bearing housing near the floating journal bearings to prevent the entry of the exhaust gas and compressed air into the bearing housing and to further absorb any axial thrust load, which comes on the rotating shaft,
• a non return valve [NRV] or one way valve in the oil inlet pipe line with opening and/or closing pressure less than the oil pressure during the idle running of an engine,
• an oil outlet line so constructed to retain sufficient quantity of lubricating oil thereby allowing adequate lubrication of the shaft & bearings after engine/vehicle shutdown wherein one end of the oil outlet pipe is connected to the turbocharger oil outlet and the oil outlet pipe extending downwards and then is bent upwards with the next inflection point at a level around the center of the shaft with the other end of the oil outlet pipe ending below the turbocharger in the oil sump.