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US 12,618,466 B2Granted
System and method for calibrating transmission
AssigneeDana Belgium N.V.
InventorsNicolas Lenaerts, Christophe De Buyser, Laurens De Bruyne
Life of this patent
Estimating the term…
Abstract
A method and system for automatically estimating clutch control parameters is described. In one example, a torque source is operated in a speed control mode so that changes in torque source torque output may be indicative of torque transfer through a clutch. Torque source torque output values may be a basis for estimating clutch fill time and clutch touch pressure.
Claims20
A method for determining a clutch fill time, comprising:
- adjusting a valve to flow a fluid to a clutch;
- and
- adjusting the clutch fill time based on an amount of time between adjusting the valve and a torque output of an electric machine increasing by more than a threshold amount of torque to maintain speed of the electric machine.
A vehicle system, comprising:
- one or more torque sources;
- a transmission including a plurality of clutches and gears;
- a controller including executable instructions that cause the controller to operate one of the one or more torque sources in a speed control mode and perform an automatic clutch parameter determination sequence that generates a clutch fill time and a clutch touch pressure according to output torque of one of the one or more torque sources.
A method for determining a clutch fill time, comprising:
- operating a torque source in a speed control mode and monitoring a torque output of the torque source while the torque source is operating in the speed control mode;
- increasing a clutch pressure from substantially zero pressure to a clutch fill pressure and maintaining the clutch pressure for an amount of time;
- and
- adjusting the amount of time according to the torque source torque output.
1 more element
Dependencies are inferred from the claim text.