Actuation of a converter lock-up clutch of a hydrodynamic torque converter by means of a safety function
AssigneeZF Friedrichshafen AG
InventorsChristoph Hess, Jörg Arnold, Jens Weller
Life of this patent
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Abstract
The invention relates to the actuation of a converter lock-up clutch (44) of a hydrodynamic torque converter (4) in a vehicle drive-train by means of a safety function where, in addition to a driving strategy function, the safety function can actuate the converter lock-up clutch (44) by issuing a clutch actuation command. For this purpose, at least one rotation speed at the torque converter (4) is monitored. If the monitored rotation speed is below a rotation speed threshold, the safety function commands an actuation of the converter lock-up clutch (44) in its opening direction.
Claims15
1-9. (canceled)
A method for actuating a converter lock-up clutch (44) of a hydrodynamic torque converter (4) in a vehicle drive-train by means of a safety function, the method comprising:
- providing a vehicle drive-train having a safety function configured to actuate a converter lock-up clutch (44) and to actuate a driving strategy function by issuing a clutch actuation command;
- monitoring at least one rotation speed at the torque converter (4) to determine a monitored rotation speed;
- and
- issuing the clutch actuation command, if the monitored rotation speed falls below a rotation speed threshold, to actuate the converter lock-up clutch (44) in its opening direction.
Dependencies are inferred from the claim text.