# US 12,179,600 B2 · Hybrid transmission, and drive train having a hybrid transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,600 B2 - Document ID: US12179600B2 - Status: Granted - Kind: B2 - Application number: 18/287,353 - Filed: 2022-03-29 - Published: 2024-06-20 - Granted: 2024-12-31 - Earliest claimed: 2021-05-03 - Assignees: Schaeffler Technologies AG & Co. KG - Applicants: Schaeffler Technologies AG & Co. KG - Inventors: Steffen Lehmann; Laurent Bayoux - Web page: https://patentgrep.com/patent/US12179600B2 ## CPC - B60K 6/547: the transmission being a stepped gearing - B60K 6/36: characterised by the transmission gearings - B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means - B60K 6/40: characterised by the assembly or relative disposition of components - B60K 6/442: Series-parallel switching type - Y02T 10/62: Hybrid vehicles - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A hybrid transmission for a hybrid vehicle includes a first torque drive train having an input shaft connectable to an internal combustion engine and a first electric machine torque-transmittingly connected to the input shaft; a second torque drive train that includes a second electric machine; an output shaft that torque-transmittingly connectable to the first torque drive train and/or the second torque drive train; and a first disconnect clutch that torque-transmittingly connects or disconnects the first torque drive train to or from the output shaft. The hybrid transmission being equipped with a second disconnect clutch that torque-transmittingly connects or disconnects the second toque drive train to or from the output shaft. ## Claims ### Claim 1 A hybrid transmission for a hybrid vehicle, comprising: a first torque drive train having an input shaft connectable to an internal combustion engine and a first electric machine connected to the input shaft in a torque-transmitting manner, a second torque drive train having a second electric machine, an output shaft that is connectable to at least one of the first torque drive train and the second torque drive train in a torque-transmitting manner, a first disconnect clutch configured to connect the first torque drive train to the output shaft in a torque-transmitting manner in a first switching state and to disconnect the first torque drive train from the output shaft in a torque-transmitting manner in a second switching state, and a second disconnect clutch configured to connect the second torque drive train to the output shaft in a torque-transmitting manner in a first switching state and to disconnect the second torque drive train from the output shaft in a torque-transmitting manner in a second switching state, wherein a rotor of the first electric machine is mounted on the input shaft in a non-rotatable manner, wherein a rotor of the second electric machine is mounted on a rotor shaft in a non-rotatable manner, the rotor shaft is arranged coaxially to the input shaft, and is connectable in a torque-transmitting manner to an intermediate shaft via a first gear-ratio stage, wherein the input shaft is connectable in torque-transmitting manner to the intermediate shaft via a second gear-ratio stage, wherein gear wheels of both the first and the second gear-ratio stages are arranged axially between the first electric machine and the second electric machine, wherein exactly one of the gear wheels of the first gear-ratio stage is provided on the rotor shaft, and exactly one of the gear wheels of the second gear-ratio stage is provided on the input shaft, wherein exactly two of the gear wheels of the first and second gear-ratio stages are provided on the intermediate shaft, and wherein exactly one gear wheel on the intermediate shaft is designed as an idler gear and exactly one gear wheel on the input shaft is designed as an idler gear, and the first and second disconnect clutches are each designed for synchronizing exactly one idler gear with the input shaft and the intermediate shaft, respectively. ### Claim 2 (depends on 1) The hybrid transmission according to claim 1, wherein the first disconnect clutch is arranged on the input shaft, and the second disconnect clutch is arranged on the intermediate shaft. ### Claim 3 (depends on 1) The hybrid transmission according to claim 1, wherein the intermediate shaft is connected to the output shaft via a third gear-ratio stage. ### Claim 4 (depends on 1) The hybrid transmission according to claim 1, wherein the gear wheel on the intermediate shaft associated with the second gear-ratio stage is also a gear wheel of a third gear-ratio stage and connects the intermediate shaft to the output shaft. ### Claim 5 (depends on 1) The hybrid transmission according to claim 1, wherein the first electric machine is operated by the internal combustion engine as a generator, and the second electric machine acts as a drive motor. ### Claim 6 (depends on 1) The hybrid transmission according to claim 1, further comprising a torsional vibration damper arranged on the input shaft and integrated into the rotor of the first electric machine. ### Claim 7 (depends on 1) The hybrid transmission according to claim 1, further comprising a slip clutch arranged on the input shaft. ### Claim 8 A drive train for a hybrid vehicle, comprising: a hybrid transmission including: a first torque drive train having an input shaft and a first electric machine connected to the input shaft in a torque-transmitting manner, a second torque drive train having a second electric machine, an output shaft that is connectable to at least one of the first torque drive train and the second torque drive train in a torque-transmitting manner, a first disconnect clutch configured to connect the first torque drive train to the output shaft in a torque-transmitting manner in a first switching state and to disconnect the first torque drive train from the output shaft in a torque-transmitting manner in a second switching state, and a second disconnect clutch configured to connect the second torque drive train to the output shaft in a torque-transmitting manner in a first switching state and to disconnect the second torque drive train from the output shaft in a torque-transmitting manner in a second switching state, wherein a rotor of the first electric machine is mounted on the input shaft in a non-rotatable manner, wherein a rotor of the second electric machine is mounted on a rotor shaft in a non-rotatable manner, the rotor shaft is arranged coaxially to the input shaft, and is connectable in a torque-transmitting manner to an intermediate shaft via a first gear-ratio stage, wherein the input shaft is connectable in torque-transmitting manner to the intermediate shaft via a second gear-ratio stage, and wherein gear wheels of both the first and the second gear-ratio stages are arranged axially between the first electric machine and the second electric machine; an internal combustion engine which is connected in a torque-transmitting manner to the input shaft of the hybrid transmission; wherein exactly one of the gear wheels of the first gear-ratio stage is provided on the rotor shaft, and exactly one of the gear wheels of the second gear-ratio stage is provided on the input shaft; wherein exactly two of the gear wheels of the first and second gear-ratio stages are provided on the intermediate shaft; and wherein exactly one gear wheel on the intermediate shaft is designed as an idler gear and exactly one gear wheel on the input shaft is designed as an idler gear, and the first and second disconnect clutches are each designed for synchronizing exactly one idler gear with the input shaft and the intermediate shaft, respectively. ### Claim 9 (depends on 8) The drive train according to claim 8, wherein the first disconnect clutch is arranged on the input shaft, and the second disconnect clutch is arranged on the intermediate shaft. ### Claim 10 (depends on 8) The drive train according to claim 8, wherein the intermediate shaft is connected to the output shaft via a third gear-ratio stage. ### Claim 11 (depends on 8) The drive train according to claim 8, wherein the gear wheel on the intermediate shaft associated with the second gear-ratio stage is also a gear wheel of a third gear-ratio stage and connects the intermediate shaft to the output shaft. ### Claim 12 (depends on 8) The drive train according to claim 8, wherein the first electric machine is operated by the internal combustion engine as a generator, and the second electric machine acts as a drive motor. ### Claim 13 (depends on 8) The drive train according to claim 8, further comprising a torsional vibration damper arranged on the input shaft and integrated into the rotor of the first electric machine. ### Claim 14 (depends on 8) The drive train according to claim 8, further comprising a slip clutch arranged on the input shaft.