# US 10,309,415 B2 · Exhaust-gas turbocharger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,415 B2 - Document ID: US10309415B2 - Status: Granted - Kind: B2 - Application number: 14/119,225 - Filed: 2012-05-21 - Published: 2014-04-10 - Granted: 2019-06-04 - Earliest claimed: 2011-06-06 - Assignees: BorgWarner Inc. - Applicants: Robert Lingenauber; Frank Scherrer; Josef-Hans Hemer; Michael Fischer - Inventors: Robert Lingenauber; Frank Scherrer; Josef-Hans Hemer; Michael Fischer - Web page: https://patentgrep.com/patent/US10309415B2 ## CPC - F04D 29/403: {especially adapted for elastic fluid pumps} - F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) - F02C 6/12: Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure - F01N 13/16: Selection of particular materials - F02B 39/00: Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 - F05D 2220/40: in turbochargers - F05D 2300/171: Steel alloys - F05D 2300/50: Intrinsic material properties or characteristics - F05D 2300/502: Thermal properties - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract An exhaust-gas turbocharger (1) having a compressor housing (2); a turbine housing (3); and a bearing housing (4) which has a compressor-side flange (5) and which has a turbine-housing-side flange (6). The turbine-housing-side flange (6) is produced from a material which corresponds in terms of its mechanical and thermal properties to the material of the turbine housing (2). ## Claims ### Claim 1 An exhaust-gas turbocharger (1) having a compressor housing (2); a turbine housing (3) having a bearing-housing-side flange having a planar contact surface; and a bearing housing (4) which has a compressor-side flange (5) and which has a turbine-housing-side flange (6) as a separately produced component which is connected to the bearing housing (4) and has a planar contact surface adapted to mating to the planar contact surface of the turbine housing (3) bearing-housing-side flange, wherein the turbine housing is formed of a material adapted to withstand exhaust-gas temperatures and thermal variations, the turbine-housing-side flange (6) of the bearing housing (4) is produced from steel and the remainder of the bearing housing (4) is produced from iron. ### Claim 2 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the turbine-housing-side flange (6) is connected to the bearing housing (4) by means of a screw connection, a shrink fit, welding, adhesive bonding, soldering or composite casting or combinations of these connection types. ### Claim 3 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the material of the bearing housing (4) turbine-housing-side flange (6) is a ferritic steel. ### Claim 4 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the material of the bearing housing (4) turbine-housing-side flange (6) is an austenitic steel. ### Claim 5 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the bearing housing other than the turbine-housing-side flange (6) is a cast part composed of a pearlitic microstructure. ### Claim 6 A bearing housing (4) for an exhaust-gas turbocharger (1), having a compressor-housing-side flange (5) and a turbine-housing-side flange (6), wherein the bearing housing other than the turbine-housing-side flange (6) is a cast part composed of a pearlitic microstructure, and wherein the turbine-housing-side flange (6) is a separately produced component which is connected to the bearing housing (4) and is produced from a high-temperature-resistant ferritic or from an austenitic cast steel. ### Claim 7 (depends on 6) The bearing housing as claimed in claim 6, wherein the turbine-housing-side flange (6) is connected to the bearing housing (4) by means of a screw connection, a shrink fit, welding, adhesive bonding, soldering or composite casting or combinations of these connection types.