Method for controlling a twin-clutch transmission
AssigneeGetrag Ford Transmissions GmbH
InventorsChristian Krauss, Michael Schwekutsch
Life of this patent
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Abstract
The invention concerns a method of controlling a twin-clutch transmission (10). When the torque transmitted in a first transmission path (C1, E2, Z8, Z9, S2, Z3, Z4) reaches an upper limit given by the torque transmission capacity of that path further additional torque produced by an engine at the drive shaft (I) is transmitted by closure of the second clutch (C2) to the output shaft (O) in parallel relationship by way of a second transmission path (C2, E1, Z1, Z2, S1, Z3, Z4). That permits the output of the engine to be better utilised and makes it possible to achieve better travel characteristics.
Claims16
A method of controlling a twin-clutch transmission (10), wherein torque is transmitted from a drive shaft (I) to an output shaft (O) by way of a first clutch (C1) and by way of a first transmission path (E2, Z8, Z9, S2, Z3, Z4),
- a second clutch C2) is at least partially closed in order to transmit an additional torque from the drive shaft (I) to the output shaft (O) by way of a second transmission path (E1, Z1, Z2, S1, Z3, Z4;
- E1, Z5, Z6, S3, Z7) when the torque transmitted by way of the first clutch (C1) reaches a predetermined upper limit.
A twin-clutch transmission (10) comprising:
- at least a first clutch (C1) and a second clutch (C2) for the transmission of torque from a drive shaft (I) to an output shaft (O) by way of different transmission paths and a control means for actuation of the clutches,
- said control means for controlling said second clutch (C2), and said second clutch (C2) being at least partially closed in order to transmit an additional torque from the drive shaft (I) to the output shaft (O) by way of a second transmission path (E1, Z1, Z2, S1, Z3, Z4;
- E1, Z5, Z6, S3, Z7) when the torque transmitted by way of said first clutch (C1) reaches a predetermined upper limit.
Dependencies are inferred from the claim text.