# US 11,451,101 B2 · Electric motor arranged for mounting to a combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,101 B2 - Document ID: US11451101B2 - Status: Granted - Kind: B2 - Application number: 17/183,660 - Filed: 2021-02-24 - Published: 2022-08-25 - Granted: 2022-09-20 - Earliest claimed: 2021-02-24 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Mohammad Moasher; Maximilian Podschwadt; David Burky - Web page: https://patentgrep.com/patent/US11451101B2 ## CPC - H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures - B60K 6/24: characterised by the combustion engines - B60K 6/26: characterised by the motors or the generators - B60K 6/40: characterised by the assembly or relative disposition of components - B60K 6/405: Housings - B60K 6/48: Parallel type - B60K 6/485: Motor-assist type - F02B 63/042: {Rotating electric generators} - H02K 7/006: {Structural association of a motor or generator with the drive train of a motor vehicle} - H02K 7/075: using crankshafts or eccentrics - H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) - H02K 11/225: Detecting coils - H02K 24/00: Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn - B60K 6/28: characterised by the electric energy storing means, e.g. batteries or capacitors - B60K 6/36: characterised by the transmission gearings - H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information - Y02T 10/62: Hybrid vehicles - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electric motor arranged for mounting to a combustion engine includes an axis of rotation, a hub, a first plate, a second plate, and a rotor. The first plate is fixed to the hub at a first radially inner diameter, the second plate is fixed to the first plate at a radially outer diameter and arranged for fixing directly to a crankshaft of the combustion engine at a second radially inner diameter, and the rotor is fixed to the hub at the first radially inner diameter. In an example embodiment, the first radially inner diameter is radially offset from the second radially inner diameter. ## Claims ### Claim 1 An electric motor arranged for mounting to a combustion engine, comprising: an axis of rotation; a hub; a first plate, fixed to the hub at a first radially inner diameter; and a second plate, fixed to the first plate at a radially outer diameter and arranged for fixing directly to a crankshaft of the combustion engine at a second radially inner diameter; and a rotor, fixed to the hub at the first radially inner diameter; and a first fastener, wherein: the rotor comprises a rotor carrier with an annular flange; the annular flange is disposed between the first plate and the hub; and the first fastener extends through respective holes in the annular flange and the first plate to fix the annular flange and the first plate to the hub. ### Claim 2 (depends on 1) The electric motor of claim 1 wherein the first radially inner diameter is radially offset from the second radially inner diameter. ### Claim 3 (depends on 1) The electric motor of claim 1 wherein: the hub comprises a cylindrical protrusion; and the annular flange comprises a first bore arranged on the cylindrical protrusion to radially position the rotor carrier relative to the hub. ### Claim 4 (depends on 3) The electric motor of claim 3 wherein the first plate comprises a second bore arranged on the cylindrical protrusion to radially position the first plate relative to the hub. ### Claim 5 (depends on 1) The electric motor of claim 1, wherein a one of the first plate or the second plate comprises a cutout section; and the other of the first plate or the second plate comprises an axially offset portion extending into the cutout section such that the axially offset portion and a portion of the one of the first plate or the second plate overlap in a circumferential direction. ### Claim 6 (depends on 1) The electric motor of claim 1 further comprising: a stud; and a nut, wherein: the stud is fixed to one of the first plate or the second plate at the radially outer diameter; the stud extends through a hole in the other of the first plate or the second plate; and the nut is threaded onto the stud to fix the second plate to the first plate. ### Claim 7 (depends on 6) The electric motor of claim 6 further comprising a housing arranged for bolting to an engine block of the combustion engine, wherein the housing comprises an access hole disposed at the radially outer diameter for inserting a tool to tighten the nut on the stud. ### Claim 8 (depends on 1) The electric motor of claim 1 further comprising: a housing arranged for bolting to an engine block of the combustion engine; and a stator, fixed in the housing radially outside of the rotor. ### Claim 9 (depends on 8) The electric motor of claim 8 further comprising a bearing for radially positioning the hub in the housing. ### Claim 10 (depends on 9) The electric motor of claim 9 wherein: the housing comprises a bulkhead wall with an axially extending protrusion; and the bearing is disposed radially between the hub and the axially extending protrusion. ### Claim 11 (depends on 10) The electric motor of claim 10 wherein the hub, the bearing, the housing, the rotor and the stator all overlap at least partially when viewed in a radial direction. ### Claim 12 (depends on 8) The electric motor of claim 8 further comprising: a resolver stator fixed to the housing; and a resolver rotor fixed to the hub, wherein the resolver stator and the resolver rotor are arranged to determine a rotational position of the rotor. ### Claim 13 A method of mounting an electric motor to a combustion engine comprising: providing the electric motor, the electric motor comprising: an axis of rotation; a first plate; a hub with a threaded hole; a second plate; a rotor including a rotor carrier with an annular flange; and a first fastener; fixing the first plate and the annular flange to the hub by inserting the first fastener through respective holes in the first plate and the annular flange, and threading the first fastener into the threaded hole at a first radially inner diameter; and fixing the second plate to a crankshaft of the combustion engine with a second fastener at a second radially inner diameter; fixing the first plate to the second plate at a radially outer diameter. ### Claim 14 (depends on 13) The method of claim 13, wherein: the electric motor further comprises a stud and a nut; the stud is fixed to a one of the first plate or the second plate at the radially outer diameter; the stud extends through a hole in the other of the first plate or the second plate; and the method further includes threading the nut onto the stud to fix the first plate to second plate. ### Claim 15 (depends on 14) The method of claim 14, wherein: the electric motor further comprises a housing with an access hole arranged for receiving a tool; and the method includes: fixing the housing to an engine block of the combustion engine; and inserting the tool through the access hole and tightening the nut on the stud after the housing is fixed to the engine block. ### Claim 16 An electric motor arranged for mounting to a combustion engine, comprising: an axis of rotation; a hub; a first plate, fixed to the hub at a first radially inner diameter; and a second plate, fixed to the first plate at a radially outer diameter and arranged for fixing directly to a crankshaft of the combustion engine at a second radially inner diameter; and a rotor, fixed to the hub at the first radially inner diameter, wherein a one of the first plate or the second plate comprises a cutout section; and the other of the first plate or the second plate comprises an axially offset portion extending into the cutout section such that the axially offset portion and a portion of the one of the first plate or the second plate overlap in a circumferential direction. ### Claim 17 (depends on 16) The electric motor of claim 16 wherein the first radially inner diameter is radially offset from the second radially inner diameter. ### Claim 18 (depends on 16) The electric motor of claim 16 further comprising: a housing arranged for bolting to an engine block of the combustion engine; and a stator, fixed in the housing radially outside of the rotor. ### Claim 19 (depends on 18) The electric motor of claim 18 further comprising a bearing for radially positioning the hub in the housing.