Patent ID: 9677437
Date: 2017-06-13
CPC Classifications: F01M,F01P,F02C

Claim:
1. A turbocharger for an internal combustion engine, the turbocharger comprising: a housing and one or more bearings, wherein the housing comprises a plurality of coolant passages for receiving a coolant to cool the turbocharger, the plurality of coolant passages including a coolant inlet leading to a coolant inlet passage, a coolant outlet passage leading to a coolant outlet, and first and second annular coolant passages axially spaced apart from the coolant inlet on either side of the coolant inlet, the housing further comprising a plurality of lubricant passages for receiving a lubricant to lubricate the bearings including a lubricant inlet leading to a lubricant inlet passage and a lubricant outlet passage leading to a lubricant outlet, the lubricant being a lubricant for both the turbocharger bearings and the internal combustion engine, wherein the coolant passages and lubricant passages are arranged in the housing to transfer heat from the lubricant in the lubricant passages to the coolant in the coolant passages, the coolant passages and lubricant passages being configured such that the transfer of heat between the coolant passages and lubricant passages is sufficient to cool the lubricant and maintain the lubricant at a temperature that is suitable for subsequent use in the internal combustion engine, wherein the coolant inlet, the coolant outlet, the lubricant inlet, and the lubricant outlet are on a radial plane, and wherein the radial plane is defined as perpendicular to a longitudinal axis of a turbocharger shaft.