# US 12,110,000 B2 · Method for operating an electrified drive train for a working machine, electrified drive train for a working machine and working machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,000 B2 - Document ID: US12110000B2 - Status: Granted - Kind: B2 - Application number: 17/909,764 - Filed: 2021-03-15 - Published: 2023-04-06 - Granted: 2024-10-08 - Earliest claimed: 2020-03-20 - Assignees: ZF Friedrichshafen AG - Applicants: ZF Friedrichshafen AG - Inventors: Rico Glöckner; Migen Bebeti; Norbert Feuchtner - Web page: https://patentgrep.com/patent/US12110000B2 ## CPC - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 10/18: including control of braking systems - B60W 10/182: {including control of parking brakes} - B60W 10/196: acting within the driveline, e.g. retarders - Y02T 10/62: Hybrid vehicles - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method for operating an electrified drive train, the drivetrain including a driving coupling of an electric motor to at least one wheel of a working machine, the method including generating an acceleration torque by the electric motor, the acceleration torque leading to an increase in speed of the at least one wheel, generating a braking torque, the braking torque leading to a reduction in speed of the at least one wheel, generating a second acceleration torque by the at least one wheel, the second acceleration torque leading to an increase in a speed of the electric motor, and generating a second braking torque by the at least one wheel, the second braking torque leading to a reduction in the speed of the electric motor, wherein, during a regenerative operation of the electric motor, an unwanted acceleration of the working machine is counteracted by an automated additional braking intervention. ## Claims ### Claim 1 A method for operating an electrified drive train for a working machine, wherein the drivetrain comprises a driving coupling of an electric motor of the drive train to at least one wheel of the working machine, the method comprising: generating an acceleration torque by the electric motor, the acceleration torque leading to an increase in speed of the at least one wheel; generating a braking torque by the electric motor, the braking torque leading to a reduction in speed of the at least one wheel; generating a second acceleration torque by the at least one wheel, the second acceleration torque leading to an increase in a speed of the electric motor; and generating a second braking torque by the at least one wheel, the second braking torque leading to a reduction in the speed of the electric motor, wherein, during a regenerative operation of the electric motor, an unwanted acceleration of the working machine is counteracted by an automated additional braking intervention. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein the additional braking intervention compensates the unwanted acceleration precisely. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein the additional braking intervention reduces a driving speed of the working machine to the extent that, as a result of the regenerative operation alone, an unwanted acceleration no longer occurs. ### Claim 4 (depends on 3) The method as claimed in claim 3, wherein the additional braking intervention is only implemented if the driving speed of the working machine has exceeded a speed threshold value. ### Claim 5 (depends on 1) The method as claimed in claim 1, wherein the unwanted acceleration is identified by simultaneously monitoring a setting device for specifying the speed of the electric motor and a driving speed of the working machine and establishing their relationship. ### Claim 6 An electrified drive train for a working machine, comprising: an electric motor; and at least one drive wheel, wherein the electric motor and the at least one drive wheel are drivingly coupled such that: an acceleration torque generated by the electric motor leads to an increase in speed of the at least one wheel, a braking torque generated by the electric motor leads to a reduction in speed of the at least one wheel, an acceleration torque generated by the at least one wheel leads to an increase in speed of the electric motor and a braking torque generated by the at least one wheel leads to a reduction in speed of the electric motor, wherein the drive train is configured to identify an unwanted acceleration of the working machine during a regenerative operation of the electric motor, and wherein the drive train is further configured to carry out an automated additional braking intervention. ### Claim 7 (depends on 6) The drive train as claimed in claim 6, wherein the drive train further comprises an inclination sensor configured to identify a gradient of an incline. ### Claim 8 (depends on 6) The drive train as claimed in claim 6, wherein the drive train further comprises a satellite navigation system configured to identify an incline. ### Claim 9 (depends on 6) The drive train as claimed in claim 6, wherein the drive train further comprises fill-level sensors of fluid containers of the working machine configured to identify an incline. ### Claim 10 (depends on 6) The drive train as claimed in claim 6, wherein the drive train comprises a friction brake configured to carry out the automated additional braking intervention. ### Claim 11 (depends on 10) The drive train as claimed in claim 10, wherein the friction brake is configured as a negative parking brake, as a spring-loaded and hydraulically releasable brake or as an eddy-current brake. ### Claim 12 (depends on 6) The drive train as claimed in claim 6, wherein the drive train is configured to implement a method for operating an electrified drive train for a working machine, the method comprising: generating an acceleration torque by the electric motor, the acceleration torque leading to an increase in speed of the at least one wheel; generating a braking torque by the electric motor, the braking torque leading to a reduction in speed of the at least one wheel; generating a second acceleration torque by the at least one wheel, the second acceleration torque leading to an increase in a speed of the electric motor; and generating a second braking torque by the at least one wheel, the second braking torque leading to a reduction in the speed of the electric motor, wherein, during a regenerative operation of the electric motor, an unwanted acceleration of the working machine is counteracted by an automated additional braking intervention. ### Claim 13 (depends on 6) A working machine comprising a drive train as claimed in claim 6.