Method and device for adapting the control of the clutches of a double clutch transmission
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMarian Preisner, Juergen Benz, Reinhard Berger
Life of this patent
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Abstract
A method of adapting control of clutches of a double clutch transmission, including: during a shifting process, controlling torque transmittable by an opening clutch and torque transmittable by a closing clutch according to nominal curves; during a shifting process, determining a difference between a nominal value and an actual value; and adapting a nominal curve of at least one of the clutches for a following shifting process by reducing a difference between the nominal value and the actual value.
Claims9
A method of adapting control of clutches of a double clutch transmission, comprising:
- during a shifting process, controlling torque transmittable by an opening clutch and torque transmittable by a closing clutch according to nominal curves;
- during a shifting process, determining a difference between a nominal value and an actual value;
- adapting a nominal curve of at least one of the clutches for a following shifting process by reducing a difference between the nominal value and the actual value;
- during a shifting process, comparing slip of the opening clutch with a nominal slip;
- increasing nominal torque of the closing clutch when the slip increases;
- and, adapting a nominal characteristic curve of the closing clutch corresponding with deviation of slip of the opening clutch at the end of overlapping shifting.
A method of adapting control of clutches of a double clutch transmission, comprising:
- during a shifting process, controlling torque transmittable by a first clutch that is opening and torque transmittable by a second clutch that is closing according to respective nominal curves;
- during the shifting process, determining a difference between a nominal value in a respective nominal curve for the first or second clutch and an actual value related to operation of the first or second clutch;
- during a shifting process, comparing slip of the first clutch with a nominal slip;
- increasing nominal torque of the second clutch when the slip increases;
- modifying the respective nominal curve by changing the nominal value to reduce a magnitude of the difference between the nominal value and the actual value;
- and,
- adapting a nominal characteristic curve of the second clutch corresponding with deviation of slip of the first clutch at the end of overlapping shifting, wherein:
- the transmission is connectable to an engine;
- actual overall torque is equal to overall static and dynamic torque input from the engine into the transmission;
- and,
- the engine is part of a vehicle and the static engine torque is a torque desired by a driver of the vehicle and input via an accelerator for the vehicle.
A method of adapting control of clutches of a double clutch transmission, comprising:
- during a shifting process, controlling torque transmittable by a first clutch that is opening and torque transmittable by a second clutch that is closing according to respective nominal torque curves;
- during the shifting process, determining a difference between a nominal torque value in a respective nominal torque curve for the first or second clutch and an actual torque value related to operation of the first or second clutch;
- during a shifting process, comparing slip of the opening clutch with a nominal slip;
- increasing nominal torque of the closing clutch when the slip increases;
- modifying the respective nominal torque curve by changing the nominal torque value to reduce a magnitude of the difference between the nominal torque value and the actual torque value;
- adapting a nominal characteristic curve of the closing clutch corresponding with deviation of slip of the opening clutch at the end of overlapping shifting;
- and,
- correcting the nominal characteristic curve of the closing clutch by a factor that depends on the torque desired by a driver of the vehicle, input by means of an accelerator for the vehicle, and adapted to the slip at the end of overlapping shifting, wherein the transmission is part of a vehicle.
Dependencies are inferred from the claim text.