Invention Grant
- Patent Title: Method and controller for operating a drivetrain of a vehicle
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Application No.: US17291777Application Date: 2019-11-07
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Publication No.: US11378142B2Publication Date: 2022-07-05
- Inventor: Kai Leingruber
- Applicant: ZF Friedrichshafen AG
- Applicant Address: DE Friedrichshafen
- Assignee: ZF Friedrichshafen AG
- Current Assignee: ZF Friedrichshafen AG
- Current Assignee Address: DE Friedrichshafen
- Agency: Finch & Maloney PLLC
- Agent Michael J. Bujold; Jay S. Franklin
- Priority: DE102018218930.7 20181107
- International Application: PCT/EP2019/080526 WO 20191107
- International Announcement: WO2020/094784 WO 20200514
- Main IPC: F16D48/06
- IPC: F16D48/06

Abstract:
A method of operating a vehicle drivetrain for rocking the vehicle free. The drivetrain has a transmission with an input and an output that can be coupled by a clutch. The input and output are connected to a drive aggregate and a drive output, respectively. The clutch is actuated based on driver actuation of an accelerator and a rotational speed of the drive output such that following accelerator actuation, when its actuation decreases, the clutch disengages with a first opening gradient. Then, based on a calculated point in time at which drive aggregate torque upon the clutch corresponds to torque on the clutch from the drive output, the clutch disengages with a second, smaller opening gradient. And depending on a rotational speed of the drive output relative to a limit value, the clutch either initiates or terminates engagement with a first closing gradient.
Public/Granted literature
- US20220010849A1 METHOD AND CONTROLLER FOR OPERATING A DRIVETRAIN OF A VEHICLE Public/Granted day:2022-01-13
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