Arrangement and method for estimating the input torque of a dual-clutch transmission
AssigneeVolvo Truck Corporation
InventorsMattias ÅSBOGÅRD, Krister FREDRIKSSON
Life of this patent
Estimating the term…
Abstract
An arrangement for estimating the input torque of a dual-clutch transmission for a vehicle is provided. The transmission includes an inner input shaft and an outer input shaft arranged concentrically with respect to the inner input shaft. The arrangement further includes a dual-clutch assembly connecting the shafts to an output shaft of an engine. A torque sensor is arranged on the outer input shaft and connected to a transmission control unit. By torque sensor, a measured torque value is provided during operation of the outer input shaft and for providing an estimated torque value during operation of the inner input shaft.
Claims17
An arrangement for estimating the input torque of a dual-clutch transmission (1) for a vehicle, said transmission (1) comprising an inner input shaft (2) and an outer input shaft (3) being arranged concentrically with respect to said inner input shaft (2), said arrangement further comprising a dual-clutch assembly (4) connecting said shafts (2, 3) to an output shaft (7) of an engine (8), characterized in that it comprises a torque sensor (14) arranged on said outer input shaft (3) and connected to a transmission control unit (9);
- said arrangement being arranged for providing, by means of said torque sensor (14), a measured torque value (Tm) during operation of said outer input shaft (3) and for providing an estimated torque value (Te) during operation of said inner input shaft (2).
An arrangement according to any one of the preceding claims, characterized in that said transmission control unit (9) is arranged for controlling the operation of said transmission (1).
An arrangement according to any one of the preceding claims, characterized in that said torque sensor (14) is connected to an engine control unit (11).
A method for estimating the input torque of a dual-clutch transmission (1) for a vehicle, wherein said transmission (1) comprises an inner input shaft (2) and an outer input shaft (3) being arranged concentrically with respect to said inner input shaft (2), and wherein said shafts (2, 3) are connected to an output shaft (7) of an engine (8) via a dual-clutch assembly (4), characterized in that said method comprises:
- providing a torque sensor (14) on said outer input shaft (3);
- connecting said torque sensor (14) to a transmission control unit (9);
- providing, by means of said torque sensor (14), a value corresponding to a measured torque value (Tm) when transmitting engine output torque only through said outer input shaft (3);
- and
- providing a value corresponding to an estimated torque value (Te) when transmitting engine output torque only through said inner input shaft (2).
A computer system for implementing a method for estimating the input torque of a dual-clutch transmission (1) for a vehicle, wherein said transmission (1) comprises an inner input shaft (2) and an outer input shaft (3) being arranged concentrically with respect to said inner input shaft (2), wherein said shafts (2, 3) are connected to an output shaft (7) of an engine (8) via a dual-clutch assembly (4) and wherein a torque sensor (14) is provided on said outer input shaft (3);
- the computer system comprising a processor operable to establishing a connection from said torque sensor (14) to a transmission control unit (9);
- providing, by means of said torque sensor, a value corresponding to a measured torque value (Tm) during operation of said outer input shaft (3);
- and providing a value corresponding to an estimated torque value (Te) during operation of said inner input shaft (2).
Dependencies are inferred from the claim text.