Multi-speed transmission and system

Abstract

The utility model relates to a multi-speed transmission and a system. In one example, a multi-speed transmission includes an input shaft driven by two parallel motors, the input shaft including a first gear and a second gear, a first clutch shaft including a first clutch engaged with the first gear, a second clutch shaft including a second clutch engaged with the second gear, the fourth clutch shaft includes a fourth clutch meshing with the second clutch, the fourth clutch shaft further including a fourth clutch shaft first gear meshing with a first clutch shaft gear disposed on the first clutch shaft, and a third clutch disposed on the input shaft, the third clutch meshing with the second clutch shaft gear.

Description

[0001] Cross-reference search of related applications

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 510,244, filed on June 26, 2023, entitled “SYSTEMS AND METHOD FOR AN ELECTRIC POWERTRAIN,” which is hereby incorporated by reference in its entirety. Technical Field

[0003] This description generally relates to transmissions for vehicles. Background Art

[0004] As vehicle electrification continues to gain popularity, automotive components will need to be modified to accommodate new vehicle architectures. For example, a transmission may require multiple gear trains to accommodate torque transfer from one or more electric motors. As vehicle packaging space continues to shrink, packaging multiple gear train transmissions can present challenges. Utility Model Content

[0005] Therefore, a transmission having multiple gear trains and a smaller package size is needed. In one example, the above problems can be solved by a multi-speed transmission including an input shaft driven by two parallel electric motors, the input shaft including a first gear and a second gear, a first clutch shaft including a first clutch meshing with the first gear, a second clutch shaft including a second clutch meshing with the second gear, a fourth clutch shaft including a fourth clutch meshing with the second clutch, the fourth clutch shaft further including a first and a fourth clutch shaft gear meshing with the first clutch shaft gear disposed on the first clutch shaft, and a third clutch disposed on the input shaft, the third clutch meshing with the second clutch shaft gear.

[0006] It should be understood that the above summary is intended to introduce concepts further described in the detailed description in a simplified form. It is not intended to identify key or essential features of the claimed subject matter, the scope of which is determined solely 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 DRAWINGS

[0007] Those skilled in the art will readily appreciate the above and other advantages of the present disclosure from the following detailed description with reference to the accompanying drawings:

[0008] Figure 1 is a schematic diagram of an example vehicle drawn according to one embodiment of the present disclosure;

[0009] Figure 2 is an embodiment of a vehicle transmission drawn according to an embodiment of the present disclosure; and

[0010] Figure 3 is an example of a transmission layout. DETAILED DESCRIPTION

[0011] The following description relates to a transmission. In one embodiment, the transmission is a multi-speed transmission, such as Figure 1 shown. Figure 2 One embodiment of a vehicle transmission is shown. Figure 3 One embodiment of a transmission layout is shown.

[0012] Figure 1-3 Example configurations of the relative positioning of various components are shown. If elements shown in a figure are in direct contact or directly coupled to each other, then, in at least one example, these elements may be referred to as being in direct contact or directly coupled, respectively. Similarly, in at least one example, elements shown as being adjacent or adjacent to each other may be adjacent or adjacent to each other, respectively. For example, elements in face-to-face contact may be referred to as face-to-face contact elements. As another example, in at least one example, elements placed apart from each other, with only space between them and no other elements, may be referred to as being placed apart from each other. As another example, elements shown above / below, to the sides of, or to the left / right of each other relative to each other may be referred to as such elements. Furthermore, as shown in the figure, in at least one example, the topmost element or element point may be referred to as the "top" of the element, and the bottommost element or element point may be referred to as the "bottom" of the element. As used herein, up / down, up / down, and up / down may be used to describe the positioning of elements in a figure relative to each other, relative to the vertical axis in the figure. Thus, in one example, an element displayed above other elements is positioned vertically above the other elements. For another example, the shapes of elements depicted in the figures may be referred to as having those shapes (e.g., as circular, straight, flat, curved, rounded, chamfered, beveled, or the like). Furthermore, in at least one example, elements depicted as intersecting one another may be referred to as intersecting elements or as intersecting one another. Furthermore, in one example, elements that appear within another element or appear outside another element may also be referred to as intersecting elements. It is understood that one or more elements referred to as "substantially similar and / or identical" may differ from one another according to manufacturing tolerances (e.g., within 1-5%).

[0013] In one example, the present disclosure provides support for a transmission coupled to at least one electric motor. In one example, two electric motors are configured to drive a counter-shaft transmission with a dual-drum assembly. The transmission can be used in a vehicle. The vehicle can be a heavy-duty vehicle, a light-duty vehicle, an off-highway vehicle, or other vehicle. In some examples, a relatively high torque multiplication may be required in first gear (e.g., 1:25). The input gear of the transmission can be configured to reduce the speed provided by the electric motor, thereby reducing the speed difference between the transmission clutches. The input and output gear ratios of the transmission can limit the speed reduction requirements between the input shaft and two clutch shafts, which are composed of four clutches, with two clutches on each clutch shaft. As a result, the size of the gears in the transmission can be reduced, thereby reducing the packaging size of the transmission. The dual-clutch arrangement can further reduce the number of gear engagements, improving system efficiency. This can extend the service life of the transmission and reduce maintenance requirements. In addition, the centerlines of the input and output shafts can be substantially parallel. In one example, substantially parallel can be defined as two lines with a primary vector extending in a single direction.

[0014] The transmission can be a multi-speed transmission, consisting of multiple shafts, gears, clutches, and bearings. The transmission components are configured to achieve four different speeds.

[0015] Now let's see Figure 1 As shown in the figure, vehicle 100 includes a powertrain 101 and a transmission 103. The powertrain includes a prime mover 106 and a transmission 108. Prime mover 106, for example, may be an electric motor, which, when in operation, provides rotational power to transmission 108. Transmission 108 may be any type of transmission, such as a manual transmission, an automatic transmission, or a continuously variable transmission. Transmission 108 receives the rotational power generated by prime mover 106 as input and outputs the rotational power to transmission 103 based on the selected gear or setting.

[0016] In one example, prime mover 106 is a first prime mover 106, and vehicle 100 may further include a second prime mover 107. First prime mover 106 may differ from second prime mover 107 in size and configuration. Each of first prime mover 106 and second prime mover 107 may be connected to an energy storage device. The energy storage device may be a battery, a fuel tank, or other similar device. The fuel capacity of the energy storage device may be monitored by a sensor or estimated based on vehicle operating conditions. In one example, one or more of first prime mover 106 and second prime mover 107 may be configured to replenish the power of the energy storage device during generator operation.

[0017] In one example, first prime mover 106 and second prime mover 107 are motors connected to an energy storage system including a plurality of battery cells. An inverter can be configured to control the power provided to the respective motors. Thus, each of first prime mover 106 and second prime mover 107 is a motor.

[0018] Vehicle 100 can be a commercial vehicle, a light, medium or heavy vehicle, a passenger vehicle, an off-highway vehicle and a sport utility vehicle. In addition, vehicle 100 and / or one or more of its components can also be used in industrial, locomotive, military, agricultural and aerospace fields.

[0019] In some examples, such as Figure 1 As shown, the driveline 103 includes a first axle assembly 102 and a second axle assembly 112. The first axle assembly 102 can be configured to drive a first set of wheels 104, and the second axle assembly 112 can be configured to drive a second set of wheels 114. In one example, the first axle assembly 102 is disposed near the front of the vehicle 100 and thus comprises a front axle, while the second axle assembly 112 is disposed near the rear of the vehicle 100 and thus comprises a rear axle. The driveline 103 is shown as a four-wheel drive configuration, but other configurations are possible. For example, the driveline 103 can include a front-wheel drive, a rear-wheel drive, or an all-wheel drive configuration. Additionally, the driveline 103 can further include one or more tandem axle assemblies. Thus, the driveline 103 can also have other configurations without departing from the scope of this disclosure. Figure 1 The configuration shown in is for illustration only and is not limiting. In addition, the vehicle 100 may also include other wheels that are not connected to the transmission system 103.

[0020] In some four-wheel drive configurations, such as Figure 1 As shown, the powertrain 103 includes a transfer case 110 configured to receive rotational power output by the transmission 108. A first drive shaft 113 is drivingly coupled to a first output end 111 of the transfer case 110, while a second drive shaft 122 is drivingly coupled to a second output end 121 of the transfer case 110. The first drive shaft 113 (e.g., a front drive shaft) transmits rotational power from the transfer case 110 to a first differential 116 of the first axle assembly 102 to drive the first set of wheels 104, while the second drive shaft 122 (e.g., a rear drive shaft) transmits rotational power from the transfer case 110 to a second differential 126 of the second axle assembly 112 to drive the second set of wheels 114. For example, the first differential 116 is drivingly coupled to a first set of axle shafts 118 coupled to the first set of wheels 104, and the second differential 126 is drivingly coupled to a second set of axle shafts 128 coupled to the second set of wheels 114. It will be appreciated that each of the first set of shafts 118 and the second set of shafts 128 may be disposed within a single housing.

[0021] Vehicle 100 may also include a control system 184. The illustrated control system 184 includes a controller 182 that receives information from a plurality of sensors 186 and sends control signals to a plurality of actuators 188. Controller 182 may receive input data from the various sensors, process the input data, and trigger actuators in response to the processed input data according to instructions or code programmed therein corresponding to one or more routines. The plurality of sensors 186 may include speed sensors, temperature sensors, humidity sensors, position sensors, accelerometers, and the like. The plurality of actuators 188 may be actuators for one or more valves, motors, and other devices.

[0022] Now let's see Figure 2 , Figure 2 A transmission assembly 200 is shown. The transmission assembly 200 may include Figure 1 In one example, the transmission assembly 200 is Figure 1 The transmission assembly 200 is a non-limiting example of the transmission 108. The transmission assembly 200 can be a multi-speed transmission. In one example, the transmission assembly 200 is a two-speed transmission.

[0023] The axis system shown in the figure includes an x-axis, a y-axis intersecting the x-axis normal, and a z-axis intersecting the x-axis and y-axis normals. In one example, the x-axis is parallel to the horizontal direction, the y-axis is parallel to the vertical axis, and the z-axis is parallel to the lateral direction.

[0024] The first inverter 202 is coupled to the first motor 204. The second inverter 206 is electrically coupled to the second motor 208. The first inverter 202 and the second inverter 206 may be configured to transfer power from the energy storage device to the first motor 204 and the second motor 208, respectively.

[0025] The first motor 204 may include a first output shaft 212 on which a first motor output gear 214 is mounted. The first motor output gear 214 is connected to and rotates with the first output shaft 212. The second motor 208 may include a second output shaft 216 on which a second motor output gear 218 is mounted. The second motor output gear 218 is connected to and rotates with the second output shaft 216. In one embodiment, the first motor 204 and the second motor 208 may be the same size. In some examples, the size of the first motor 204 may be different from the size of the second motor 208. In one example, the shape and size of the first motor output gear 214 are the same as those of the second motor output gear 218. In some examples, the shape and / or size of the first motor output gear 214 are different from those of the second motor output gear 218.

[0026] An input gear 222 may be mounted on and connected to the input shaft 220. The input gear 222 may mesh with the first motor output gear 214 and the second motor output gear 218, respectively. In one example, the first motor output gear 214, the second motor output gear 218, and the input gear 222 are each disposed within the transmission housing 201. The boundary of the transmission housing 201 is indicated by a dashed box. Therefore, the first output shaft 212 and the second output shaft 216 may extend parallel to the x-axis and pass through the surface of the transmission housing 201 into the interior of the transmission housing 201.

[0027] Input gear 222 can rotate input shaft 220. First gear 224 can be mounted on and connected to input shaft 220. Second gear 226 can be mounted on and connected to input shaft 220. First gear 224 and second gear 226 can rotate as input shaft 220 rotates. In one example, first gear 224 is closer to input gear 222 than second gear 226.

[0028] The first gear 224 can mesh with a gear of a first clutch 232 disposed on a first clutch shaft 231. The first clutch 232 can control the transmission of power from the first gear 224 to the first clutch shaft 231. When the first clutch shaft 231 rotates, the first clutch shaft gear 233 can rotate. The first clutch shaft 231 can be parallel to the first output shaft 212 and the second output shaft 216.

[0029] The second gear 226 may mesh with a gear of the second clutch 234. The second clutch 234 may control power transmission from the second gear 226 to the second clutch shaft 241. A second clutch shaft first gear 242 and a second clutch shaft second gear 244 may be mounted on the second clutch shaft 241.

[0030] The third clutch 236 can be mounted on the input shaft 220. A gear of the third clutch 236 can mesh with the second clutch shaft second gear 244. The third clutch 236 can control the transmission of power from the input shaft 220 to the second clutch shaft second gear 244. In one example, the input shaft 220 can be interchangeably referred to as the third shaft.

[0031] The second clutch 234 can include a gear that meshes with a gear of the fourth clutch 238. The fourth clutch 238 can be mounted on a fourth clutch shaft 250. In one example, the fourth clutch 238 can control the transmission of power from the second clutch 234 to the fourth clutch shaft 250.

[0032] The fourth clutch shaft first gear 252 can mesh with the first clutch shaft gear 233. Therefore, when the first clutch 232 is locked (e.g., closed) and power is transmitted from the first gear 224 through the first clutch 232 to the first clutch shaft gear 233, the fourth clutch shaft first gear 252 can rotate, thereby rotating the fourth clutch shaft 250 at a first speed. In one example, when the first clutch 232 is closed, each of the second clutch 234, the third clutch 236, and the fourth clutch 238 is in an open state.

[0033] When the second clutch 234 is closed (e.g., locked) and one or more of the first clutch 232, third clutch 236, and fourth clutch 238 are open, the fourth clutch shaft 250 can rotate at a second speed. In this configuration, the second clutch shaft 241 rotates via power transmitted from the second gear 224 to the second clutch 234. The second clutch shaft 241 can rotate the second clutch shaft first gear 242, which, through engagement, rotates the fourth clutch shaft second gear 254. In one example, when the second clutch 234 is closed, each of the first clutch 232, third clutch 236, and fourth clutch is in an open state.

[0034] When third clutch 236 is closed and one or more of first clutch 232, second clutch 234, and fourth clutch 238 are open, fourth clutch shaft 250 can rotate at a third speed. Third clutch 236 can transfer power from input shaft 220 to second clutch shaft second gear 244. Second clutch shaft second gear 244 can rotate second clutch shaft 241, thereby rotating second clutch shaft first gear 242. Second clutch shaft first gear 242 drives fourth clutch shaft second gear 254 to rotate. In one example, when third clutch 236 is closed, each of first clutch 232, second clutch 234, and fourth clutch 238 is open.

[0035] When the fourth clutch 238 is closed and one or more of the first clutch 232, the second clutch 234, and the third clutch 236 are open, the fourth clutch shaft 250 can rotate at a fourth speed. In this configuration, the gear of the second clutch 234, which is meshed with and rotated by the second gear 226, transmits power to the gear of the fourth clutch 238, where the fourth clutch 238 transmits power to the fourth clutch shaft 250. In one example, when the fourth clutch 238 is closed, the first clutch 232, the second clutch 234, and the third clutch 236 are open.

[0036] In one example, each of the first speed, the second speed, the third speed, and the fourth speed is a different speed. Figure 2 The example of a four-speed transmission is illustrated. In one example, each of the first clutch 232, the second clutch 234, the third clutch 236, and the fourth clutch 238 is a wet clutch, including a gear, a hub, a plurality of friction plates coupled to the hub, and a plurality of release plates selectively coupled to the plurality of friction plates by piston actuation based on hydraulic fluid force and spring force. Each of the first clutch 232, the second clutch 234, the third clutch 236, and the fourth clutch 238 can be configured to transmit power or to suspend power transmission. In one example, only one clutch is in the closed position for each speed, while the other clutches are in the open position. Therefore, for each speed, only one clutch is transmitting power, while the other clutches prevent (e.g., suspend) power transmission.

[0037] Fourth clutch shaft third gear 256 rotates in response to the rotation of fourth clutch shaft 250. Fourth clutch shaft third gear 256 meshes with output shaft gear 262 disposed on output shaft 260. Output shaft 260 outputs power to output member 264. Alternatively, output shaft 260 may directly output power to wheels or a differential.

[0038] In one example, when transmission 200 operates, each of first clutch shaft 231, second clutch shaft 241, and fourth clutch shaft 250 rotates. For example, when generating a first speed, first clutch 232 is closed, and first clutch shaft 231 rotates due to the rotation provided by the gears of first clutch 232. When generating a third speed, third clutch 236 is closed, which may cause first clutch shaft 231 to rotate due to the meshing between fourth clutch shaft first gear 252 and first clutch shaft gear 233. However, when generating the third speed, the rotation of first clutch shaft 231 may not affect the third speed.

[0039] Now let's see Figure 3 , Figure 3 An example layout 300 of the transmission 200 is shown. As shown in the layout diagram 300, the fourth clutch shaft 250 and the output shaft 260 are parallel to the X-axis. In one example, the fourth clutch shaft 250 and the output shaft 260 may also include a vector extending parallel to the X-axis. Figure 2 and Figure 3 In the example shown in FIG. 1 , each shaft of the transmission 200 and the motor can be parallel to or include a vector extending parallel to the x-axis. Thus, the first output shaft 212 , the second output shaft 216 , the input shaft 220 , the first clutch shaft 231 , the second clutch shaft 241 , the fourth clutch shaft 250 , and the output shaft 260 are parallel to each other and to the x-axis.

[0040] Example layout 300 illustrates the interactions between gears using lines. Shafts are arranged at the intersections between the lines. The angles of the lines represent the angles of the gear arrangement in transmission 200 within the vehicle's drivetrain. Line 302 represents the interaction between first clutch shaft gear 233 and fourth clutch shaft first gear 252. Line 304 illustrates the interaction between second clutch shaft first gear 242 and fourth clutch shaft second gear 254. Line 304 also illustrates the interaction between second clutch 234 and fourth clutch 238. Line 306 illustrates the interaction between first gear 224 and a gear on first clutch 232. Line 308 illustrates the interaction between second gear 226 and a gear on second clutch 234. Line 308 also illustrates the interaction between a gear on third clutch 236 and second clutch shaft second gear 244. Line 310 illustrates the interaction between third and fourth clutch shaft gears 250 and output gear 262 on output shaft 260.

[0041] In one example, a transmission includes a plurality of shafts, a plurality of clutches, and a plurality of gears arranged in a transmission housing, wherein each of the plurality of shafts is parallel to an axis. The plurality of gears may be arranged at an angle relative to the axis, wherein the angle is between 0 and 90 degrees. In one example, the angle is less than 90 degrees and greater than 0 degrees. The plurality of shafts and the plurality of gears may be arranged in a diamond or square configuration.

[0042] The present disclosure provides support for a multi-speed transmission comprising an input shaft driven by two parallel electric motors, the input shaft comprising a first gear and a second gear, a first clutch shaft comprising a first clutch, a second clutch shaft comprising a second clutch, a fourth clutch shaft comprising a fourth clutch engaged with the second clutch, the fourth clutch shaft further comprising a fourth clutch shaft first gear engaged with the first clutch shaft gear disposed on the first clutch shaft and a fourth clutch shaft second gear engaged with the second clutch shaft first gear, and a third clutch disposed on the input shaft, the third clutch engaged with the second clutch shaft second gear. A first example of the multi-speed transmission further comprises the output shaft comprising a main vector parallel to a main vector of an axis extending from the two electric motors to the input shaft. A second example of the multi-speed transmission (optionally including the first example) further comprises the input shaft, the first clutch shaft, the second clutch shaft, and the fourth clutch shaft being parallel to each other and to the output shaft. A third example of the multi-speed transmission, which may optionally include one or more of the foregoing examples, further comprises the input shaft, the first clutch shaft, the second clutch shaft, and the fourth clutch shaft each rotating when at least one of the first clutch, the second clutch, the third clutch, or the fourth clutch is closed. A fourth example of a multi-speed transmission, optionally including one or more of the preceding examples, further includes wherein the first gear meshes with a gear of the first clutch. A fifth example of a multi-speed transmission (optionally including one or more of the preceding examples) further includes wherein the second gear meshes with a gear of the second clutch.

[0043] The present disclosure provides additional support for a system comprising a multi-speed transmission, the transmission comprising a transmission housing containing a plurality of clutches and a plurality of gears arranged on a plurality of shafts, wherein the plurality of shafts are parallel to an axis and the plurality of gears are arranged at angles between 0 and 90 degrees with the axis. A first example of the system further comprises a first electric motor comprising a first output shaft and a second electric motor comprising a second output shaft, wherein the first output shaft and the second output shaft are parallel to the axis. A second example of the system (optionally including the first example) further comprises wherein the first output shaft and the second output shaft extend into the transmission housing, and wherein the first output shaft comprises a first electric motor output gear and the second output shaft comprises a second electric motor output gear, which are arranged within the transmission housing and mesh with an input gear arranged on an input shaft of the multi-speed transmission. A third example of the system, optionally including one or more of the preceding examples, further comprises a plurality of clutches comprising a first clutch arranged on the first shaft, a second clutch arranged on the second shaft, a third clutch arranged on the third shaft, and a fourth clutch arranged on the fourth shaft. A fourth example of the system, optionally including one or more of the preceding examples, further comprises the plurality of shafts arranged in a diamond configuration. A fifth example of the system (optionally including one or more of the preceding examples) further comprises the output shafts being parallel to the axis. A sixth example of the system (optionally including one or more of the preceding examples) further includes an output shaft extending from the transmission housing to an output member outside the transmission housing. A seventh example of the system (optionally including one or more of the preceding examples) further includes each of the plurality of shafts including at least one clutch from the plurality of clutches and at least one gear from the plurality of gears disposed thereon. An eighth example of the system, optionally including one or more of the preceding examples, further includes at least one gear from each of the plurality of shafts coupled to a clutch gear or gears of another of the plurality of shafts.

[0044] The present disclosure further supports a system for a multi-speed transmission, the system comprising an input shaft including an input gear driven by output gears of two electric motors, a first gear on the input shaft meshing with a first clutch, a second gear on the input shaft meshing with a second clutch, the first shaft including a first clutch and a first clutch shaft gear, the second shaft including a second clutch, a second clutch shaft first gear, and a second clutch shaft second gear, wherein the second clutch shaft second gear meshes with a third clutch disposed on the input shaft; a fourth shaft including a fourth clutch, a fourth clutch shaft first gear, a fourth clutch shaft second gear, and a fourth clutch shaft third gear, wherein the fourth clutch shaft first gear meshes with the first clutch shaft gear, the fourth clutch shaft second gear meshes with the second clutch shaft first gear, and the fourth clutch meshes with the second clutch; an output gear on an output shaft meshing with the fourth clutch shaft third gear, wherein the input shaft, the first shaft, the second shaft, the fourth shaft, and the output shaft are parallel to an axis. A first example of the system further includes wherein the gears of the first shaft, the second shaft, the input shaft, and the fourth shaft are arranged at an angle less than 90 degrees with the axis. A second example of the system (optionally including the first example) further includes: the output shafts of the two motors and the output shaft extend only outside the transmission housing, wherein the output shafts of the two motors are parallel to the axis. A third example of the system, optionally including one or more of the preceding examples, further includes: the fourth clutch is arranged between the first gear of the fourth clutch shaft and the second gear of the fourth clutch shaft. A fourth example of the system (optionally including one or more of the preceding examples) further includes: the multi-speed transmission is a four-speed transmission.

[0045] The term "approximately" as used herein should be understood to mean a range of plus or minus 5%, unless otherwise specified.

[0046] The following claims particularly point out certain combinations and subcombinations regarded as novel and non-obvious. These claims may refer to "an" element or a "first" element or its equivalent. These claims should be understood to include one or more such elements, neither requiring nor excluding two or more such elements. Other combinations and subcombinations of the disclosed features, functions, elements, and / or properties may be claimed by amendment of the present claims or by presentation of new claims in this or a related application. Such claims, whether broader, narrower, equal, or different in scope to the original claims, are also deemed included within the subject matter of the present disclosure.

Claims

1. A multi-speed transmission, characterized in that: include: an input shaft driven by two parallel motors, the input shaft comprising a first gear and a second gear; a first clutch shaft including a first clutch; a second clutch shaft including a second clutch; a fourth clutch shaft comprising a fourth clutch engaged with the second clutch, the fourth clutch shaft further comprising a fourth clutch shaft first gear engaged with the first clutch shaft gear disposed on the first clutch shaft, and a fourth clutch shaft second gear engaged with the second clutch shaft first gear; and A third clutch is arranged on the input shaft, and the third clutch is engaged with the second gear of the second clutch shaft.

2. The multi-speed transmission according to claim 1, wherein: The output shaft includes a main vector that is parallel to the main vector of the shaft extending from the two electric machines to the input shaft.

3. The multi-speed transmission according to claim 1, wherein: The input shaft, the first clutch shaft, the second clutch shaft, and the fourth clutch shaft are parallel to each other and to the output shaft.

4. The multi-speed transmission according to claim 1, wherein: When at least one of the first clutch, the second clutch, the third clutch, or the fourth clutch is closed, each of the input shaft, the first clutch shaft, the second clutch shaft, and the fourth clutch shaft rotates.

5. The multi-speed transmission according to claim 1, wherein: The first gear meshes with a gear of the first clutch.

6. The multi-speed transmission according to claim 1, wherein: The second gear meshes with a gear of the second clutch.

7. A system characterized in that include: A multi-speed transmission comprising a transmission housing and including: an input shaft driven by two parallel motors, the input shaft comprising a first gear and a second gear; a first clutch shaft including a first clutch; a second clutch shaft including a second clutch; a fourth clutch shaft comprising a fourth clutch engaged with the second clutch, the fourth clutch shaft further comprising a fourth clutch shaft first gear engaged with the first clutch shaft gear disposed on the first clutch shaft, and a fourth clutch shaft second gear engaged with the second clutch shaft first gear; and A third clutch is arranged on the input shaft, and the third clutch is engaged with the second gear of the second clutch shaft.

8. The system according to claim 7, characterized in that It also includes a first motor consisting of a first output shaft and a second motor consisting of a second output shaft, wherein the first output shaft and the second output shaft are parallel to the axis.

9. The system according to claim 8, characterized in that The first output shaft and the second output shaft extend into the transmission housing, the first output shaft includes a first motor output gear, the second output shaft includes a second motor output gear, the second motor output gear is arranged in the transmission housing and meshes with the input gear arranged on the multi-speed transmission input shaft.

10. The system according to claim 7, wherein: The plurality of clutches include a first clutch disposed on the first shaft, a second clutch disposed on the second shaft, a third clutch disposed on the third shaft, and a fourth clutch disposed on the fourth shaft.

11. The system according to claim 7, wherein: Multiple axes are arranged in a diamond shape.

12. The system according to claim 7, wherein: Also included is an output shaft parallel to the axis.

13. The system according to claim 12, wherein: The output shaft extends from within the transmission housing to an output member outside the transmission housing.

14. The system according to claim 7, wherein: Each of the plurality of shafts includes at least one clutch of the plurality of clutches and at least one gear of the plurality of gears.

15. The system according to claim 14, wherein: At least one gear of each of the plurality of shafts is connected to a clutch gear or a gear of another shaft of the plurality of shafts.

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