Vehicle system with multi-speed transmission
AssigneeDana Automotive Systems Group, LLC
InventorEric M. Engerman
Life of this patent
Estimating the term…
Abstract
Methods and systems for a vehicle transmission are provided. A transmission system includes, in one example, an intermediate shaft rotationally coupled to an input shaft and an output shaft, wherein the input shaft is configured to receive rotational input from an electric machine. The system further includes a first gear coupled to the intermediate shaft, and a plurality of clutches coupled to the input shaft and the output shaft and configured to in a first mode, transfer power directly between a second gear coupled to the input shaft, the first gear, and a third gear coupled to the output shaft, and in a second mode, transfer power indirectly between the second gear, the first gear, and/or the third gear.
Claims9
A method for operation of a transmission system, comprising:
- while the transmission system is operating in a first mode, operating a first clutch positioned coaxially to an input shaft and a third clutch positioned coaxially to an output shaft to transfer power sequentially through a first gear coupled to the input shaft, a second gear coupled to an intermediate shaft arranged between the input shaft and the output shaft and a seventh gear coupled to the output shaft;
- and
- while the transmission system is operating in a second mode, operating a second clutch positioned coaxially to the input shaft and the third clutch to transfer power sequentially through a third gear coupled to the input shaft, the second gear, and the seventh gear.
A method for operation of a transmission system, comprising:
- while the transmission system is operating in a first mode, operating a first clutch positioned coaxially to an input shaft and a fourth clutch positioned coaxially to an output shaft to transfer power sequentially through a first gear coupled to the input shaft, a second gear coupled to an intermediate shaft arranged between the input shaft and the output shaft, and a sixth gear coupled to the output shaft;
- and
- while the transmission system is operating in a second mode, operating a second clutch positioned coaxially to the input shaft and the fourth clutch to transfer power sequentially through a third gear coupled to the input shaft, a fourth gear coupled to the intermediate shaft, a fifth gear coupled to the intermediate shaft, and the sixth gear.
Dependencies are inferred from the claim text.