US-12624746-B2 - Systems and method for an electric powertrain

Abstract

Systems are provided for a transmission system. In one example, a multi-speed transmission includes an input shaft comprising an input gear driven by two electric motors, a first clutch comprising a first clutch gear configured to rotate a first shaft on which a first synchronizer is arranged, wherein the first clutch is arranged on the input shaft, a second clutch comprising a second clutch gear configured to rotate a second shaft on which a second synchronizer is arranged, wherein the second clutch is arranged on the input shaft, an idler shaft comprising a plurality of gears in meshed engagement with gears of the first synchronizer and the second synchronizer, and an output shaft comprising an output gear in meshed engagement with a gear of the plurality of gears of the idler shaft.

Inventors

• KURT CATTOOR
• Filip D. Schacht
• JOACHIM VAN DINGENEN

Assignees

• DANA BELGIUM N.V.

Dates

Publication Date

20260512

Application Date

20240520

Claims (20)

1. 1 . A multi-speed transmission, comprising: an input shaft comprising an input gear driven by two electric motors; a first clutch comprising a first clutch gear configured to rotate a first shaft on which a first synchronizer is arranged, wherein the first clutch is arranged on the input shaft; a second clutch comprising a second clutch gear configured to rotate a second shaft on which a second synchronizer is arranged, wherein the second clutch is arranged on the input shaft; an idler shaft comprising a plurality of gears in meshed engagement with gears of the first synchronizer and the second synchronizer, wherein the input shaft, the first shaft, the second shaft, and the idler shaft are arranged in a square or a diamond shape such that the input shaft is positioned vertically above the idler shaft; and an output shaft comprising an output gear in meshed engagement with a gear of the idler shaft.
2. 2 . The multi-speed transmission of claim 1 , wherein the output shaft comprises a primary vector that is parallel to primary vectors of shafts extending from the two electric motors to the input shaft.
3. 3 . The multi-speed transmission of claim 1 , wherein the first synchronizer comprises a first synchro gear and a third synchro gear arranged on the first shaft.
4. 4 . The multi-speed transmission of claim 3 , wherein the second synchronizer comprises a second synchro gear and a fourth synchro gear arranged on the second shaft.
5. 5 . The multi-speed transmission of claim 1 , wherein the two electric motors output power to the input gear via a first electric motor output gear and a second electric motor output gear.
6. 6 . The multi-speed transmission of claim 1 , wherein the multi-speed transmission is a counter shaft multi-speed transmission.
7. 7 . The multi-speed transmission of claim 1 , wherein the multi-speed transmission is a four-speed transmission.
8. 8 . A system, comprising: a multi-speed transmission arranged in a housing, the multi-speed transmission, comprising: an input shaft comprising an input gear driven by two electric motors; a first clutch comprising a first clutch gear configured to rotate a first shaft on which a first synchronizer is arranged, wherein the first clutch is arranged on the input shaft; a second clutch comprising a second clutch gear configured to rotate a second shaft on which a second synchronizer is arranged, wherein the second clutch is arranged on the input shaft; an idler shaft comprising a plurality of gears, each in meshed engagement with a gear of either the first synchronizer or the second synchronizer; and an output shaft comprising an output gear in meshed engagement with a gear of the idler shaft.
9. 9 . The system of claim 8 , wherein the first clutch gear is meshed with a first gear of the first shaft.
10. 10 . The system of claim 8 , wherein the second clutch gear is meshed with a second gear of the second shaft.
11. 11 . The system of claim 8 , wherein the input shaft, the first shaft, the second shaft, the idler shaft, and the output shaft are parallel to one another.
12. 12 . The system of claim 8 , wherein the input gear is driven by one or more of a first electric motor output gear and a second electric motor output gear.
13. 13 . The system of claim 12 , wherein the first electric motor output gear is arranged on a first electric motor shaft and the second electric motor output gear is arranged on a second electric motor shaft, wherein the first electric motor shaft and the second electric motor shaft are parallel to each of the input shaft, the first shaft, the second shaft, the idler shaft, and the output shaft.
14. 14 . The system of claim 8 , wherein the first synchronizer comprises a first synchronizer gear and a third synchronizer gear, and wherein the second synchronizer comprises a second synchronizer gear and a fourth synchronizer gear.
15. 15 . The system of claim 14 , wherein the plurality of gears comprises a first idler gear engaged with the first synchronizer gear, a second idler gear engaged with the third synchronizer gear, a third idler gear engaged with the second synchronizer gear, and a fourth idler gear engaged with the fourth synchronizer gear.
16. 16 . A system, comprising: a first electric motor comprising a first electric motor shaft on which a first electric motor output gear is arranged; a second electric motor comprising a second electric motor shaft on which a second electric motor output gear is arranged; a multi-speed transmission arranged in a housing, the multi-speed transmission, comprising: an input shaft comprising an input gear driven by one or more of the first electric motor output gear and the second electric motor output gear; a first clutch comprising a first clutch gear configured to rotate a first shaft on which a first synchronizer is arranged, wherein the first clutch is arranged on the input shaft; a second clutch comprising a second clutch gear configured to rotate a second shaft on which a second synchronizer is arranged, wherein the second clutch is arranged on the input shaft; an idler shaft comprising a plurality of gears, each in meshed engagement with a gear of either the first synchronizer or the second synchronizer, wherein input shaft is positioned vertically above the idler shaft; and an output shaft comprising an output gear in meshed engagement with a gear of the idler shaft.
17. 17 . The system of claim 16 , wherein the first electric motor shaft, the second electric motor shaft, the input shaft, the first shaft, the second shaft, the idler shaft, and the output shaft are parallel to one another.
18. 18 . The system of claim 16 , wherein the input shaft, the first shaft, the second shaft, and the idler shaft are arranged in a square shape.
19. 19 . The system of claim 16 , wherein the first electric motor shaft, the second electric motor shaft, and the output shaft are the only shafts the extend outside of the housing.
20. 20 . The system of claim 16 , wherein the output shaft is coupled to an output member arranged outside of the housing.

Description

CROSS REFERENCE TO RELATED APPLICATION The present application claims priority to U.S. Provisional Application No. 63/519,492, entitled “SYSTEMS AND METHOD FOR AN ELECTRIC POWERTRAIN”, and filed on Aug. 14, 2023. The entire contents of the above-listed application are hereby incorporated by reference for all purposes. TECHNICAL FIELD The present description relates generally to a transmission of a vehicle. BACKGROUND AND SUMMARY As the proliferation of vehicle electrification continues, changes to vehicle components are demanded to accommodate new vehicle architectures. For example, transmissions may need multiple gear trains to accommodate torque transfer from one or more electric motors. Packaging of a multi-gear train transmission may present certain challenges as packaging space available in vehicles continues to be reduced. Thus, a demand for a transmission with multiple gear trains and a reduced packaging size is desired. In one example, the issues described above may be addressed by a multi-speed transmission including an input shaft comprising an input gear driven by two electric motors, a first clutch comprising a first clutch gear configured to rotate a first shaft on which a first synchronizer is arranged, wherein the first clutch is arranged on the input shaft, a second clutch comprising a second clutch gear configured to rotate a second shaft on which a second synchronizer is arranged, wherein the second clutch is arranged on the input shaft, an idler shaft comprising a plurality of gears in meshed engagement with gears of the first synchronizer and the second synchronizer, and an output shaft comprising an output gear in meshed engagement with a gear of the plurality of gears of the idler shaft. It should be understood that the summary above is provided to introduce in simplified form a selection of concepts that are further described in the detailed description. It is not meant to identify key or essential features of the claimed subject matter, the scope of which is defined uniquely by the claims that follow the detailed description. Furthermore, the claimed subject matter is not limited to implementations that solve any disadvantages noted above or in any part of this disclosure. BRIEF DESCRIPTION OF THE FIGURES The above, as well as other advantages of the present disclosure, will become readily apparent to those skilled in the art from the following detailed description when considered in light of the accompanying drawings in which: FIG. 1 is a schematic depiction of an example vehicle, according to an embodiment of the present disclosure; FIG. 2 is an embodiment of a transmission of the vehicle, according to an embodiment of the present disclosure; and FIG. 3 is an embodiment of a layout of the transmission. DETAILED DESCRIPTION The following description relates to a transmission. In one example, the transmission is a multi-speed transmission, as shown in FIG. 1. FIG. 2 illustrates an embodiment of a transmission of the vehicle. FIG. 3 illustrates an embodiment of a layout of the transmission. FIGS. 1-3 show example configurations with relative positioning of the various components. If shown directly contacting each other, or directly coupled, then such elements may be referred to as directly contacting or directly coupled, respectively, at least in one example. Similarly, elements shown contiguous or adjacent to one another may be contiguous or adjacent to each other, respectively, at least in one example. As an example, components laying in face-sharing contact with each other may be referred to as in face-sharing contact. As another example, elements positioned apart from each other with only a space there-between and no other components may be referred to as such, in at least one example. As yet another example, elements shown above/below one another, at opposite sides to one another, or to the left/right of one another may be referred to as such, relative to one another. Further, as shown in the figures, a topmost element or point of element may be referred to as a “top” of the component and a bottommost element or point of the element may be referred to as a “bottom” of the component, in at least one example. As used herein, top/bottom, upper/lower, above/below, may be relative to a vertical axis of the figures and used to describe positioning of elements of the figures relative to one another. As such, elements shown above other elements are positioned vertically above the other elements, in one example. As yet another example, shapes of the elements depicted within the figures may be referred to as having those shapes (e.g., such as being circular, straight, planar, curved, rounded, chamfered, angled, or the like). Further, elements shown intersecting one another may be referred to as intersecting elements or intersecting one another, in at least one example. Further still, an element shown within another element or shown outside of another element may be referred as such, in one