Mechanical torque limiter

Abstract

A torque vectoring system includes a torque limiter disposed between an engine shaft and an engine input gear of a torque vectoring arrangement. The torque limiter includes a first clutch housing configured to rotate with the engine shaft; and a second clutch housing configured to rotate the engine input gear. The second clutch can be selectively coupled to the first clutch housing via an interface mechanism that is overcome during high rotation of the engine shaft.

Description

MECHANICAL TORQUE LIMITERCROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of Indian Provisional Application No. 202411034136, filed April 30, 2024, the disclosure of which is incorporated by reference in its entirety.BACKGROUND

[0002] A torque vectoring system manages the amount of power an engine or other prime mover applies to each wheel of a vehicle. An input shaft driven by the prime mover leads to an input gear of the torque vectoring system. The torque from the input gear is transferred to left and right axles leading to wheels of the vehicle. Overload conditions may appear due to unpredictable road conditions (e.g., wheel spin on an icy surface). During such conditions, rapid speed changes between the wheels may lead to back drive on the input shaft. Due to motor inertia, torque may increase above design limits of the system. Improvements are desired.SUMMARY

[0003] A torque limiting device can be disposed between the prime mover and the torque vectoring system to isolate the torque vectoring system from the prime mover during overload conditions. In certain implementations, the torque limiting device actuates automatically during overload conditions without the need for manual initiation.

[0004] In certain implementations, the torque limiting device includes a first clutch housing configured to rotate with the input shaft; a second clutch housing configured to interface with the input gear of the torque vectoring arrangement; and an interface arrangement configured to selectively couple the first and second clutch housing. In some implementations, the interface arrangement includes an interface member coupled to the second clutch housing that is biased towards engagement with the first clutch housing. In other implementations, the interface member may be coupled to the first clutch housing and biased towards engagement with the second clutch housing. When the interface arrangement engages the first and second clutch housings, the input gear rotates with the input shaft. When the interface arrangement disengages the first and second clutch housings, the input gear is isolated from the input shaft.

[0005] In some implementations, the interface member includes one or more spring-biased ball plungers.

[0006] In other implementations, the interface member includes a spring-biased cam plate.

[0007] A variety of additional inventive aspects will be set forth in the description that follows. The inventive aspects can relate to individual features and to combinations of features. It is to be understood that both the forgoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the broad inventive concepts upon which the embodiments disclosed herein are based.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated in and constitute a part of the description, illustrate several aspects of the present disclosure. A brief description of the drawings is as follows:

[0009] FIG. 1 is a schematic diagram of a portion of a vehicle drive system including a prime mover, a torque vectoring arrangement, and a torque limiting arrangement disposed therebetween, the torque limiting arrangement being configured in accordance with the principles of the present disclosure.

[0010] FIG. 2 is a cross-sectional view of a first example torque limiting arrangement suitable for use with torque vectoring arrangement of FIG. 1, the first torque limiting arrangement shown in an engaged position.

[0011] FIG. 3 is a perspective view of an example of a first clutch housing of the first torque limiting arrangement of FIG. 2.

[0012] FIG. 4 is a perspective view of the first clutch housing of FIG. 3 exploded outwardly from a second clutch housing of the first torque limiting arrangement of FIG. 2.

[0013] FIG. 5 shows the first example torque limiting arrangement of FIG. 2 arranged in a disengaged position.

[0014] FIG. 6 is a cross-sectional view of a second example torque limiting arrangement suitable for use with torque vectoring arrangement of FIG. 1, the second torque limiting arrangement shown in an engaged position.

[0015] FIG. 7 is a perspective view of an example of a first clutch housing of the second torque limiting arrangement of FIG. 6.

[0016] FIG. 8 is a perspective view of the first clutch housing of FIG. 7 exploded outwardly from a second clutch housing of the second torque limiting arrangement of FIG. 6.

[0017] FIG. 9 is a perspective view of the first and second clutch housings of the of the second torque limiting arrangement of FIG. 6.

[0018] FIG. 10 shows the second example torque limiting arrangement of FIG. 6 arranged in a disengaged position.

[0019] FIG. 11 is a perspective view of the first and second clutch housings of the of the second torque limiting arrangement of FIG. 10.DETAILED DESCRIPTION

[0020] Reference will now be made in detail to exemplary aspects of the present disclosure that are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0021] FIG. 1 is a schematic diagram of a portion of a vehicle drive system 100 including a prime mover 102 (e.g., an internal combustion engine, an electronic motor, etc.) and a torque vectoring arrangement 110. The torque vectoring arrangement 110 includes an input gear 106 that is operationally coupled (see dashed lines 116) to left and right axle interfaces 112, 114. In some examples, the input gear 106 is mechanically coupled to the axle interfaces 112, 114 to apply torque thereto. In other examples, the input gear 106 can be electronically, hydraulically, or otherwise coupled to the axle interfaces 112, 114 to apply torque thereto. The axle interfaces 112, 114 transfer the torque from the input gear 106 to respective wheels of the vehicle. An input shaft 104 extends from the prime mover 102 towards the torque vectoring arrangement 110 to transfer torque from the prime mover 102 to the torque vectoring arrangement 110.

[0022] In accordance with aspects of the disclosure, a torque limiting arrangement 120 is disposed operationally between the input shaft 104 of the prime mover 102 and the input gear 106 of the torque vectoring arrangement 110. When actuated (e.g., during overload conditions), the torque limiting arrangement 120 isolates the input gear 106 of the torque vectoring arrangement 110 from the input shaft 104. When de-actuated (i.e., during normal operation conditions), the torque limiting arrangement 120 transfers the torque from the input shaft 104 to the input gear 106.

[0023] In certain implementations, the torque limiting arrangement 120 includes a first clutch housing 122 and a second clutch housing 124. The first clutch housing 122 is configured to rotate in unison with the input shaft 104. The second clutch housing 124 is coupled to an interface gear 126 that is aligned with and configured to mesh with the input gear 106 of the torque vectoring arrangement 110. The interface gear 126 is configured to rotate in unison with the second clutch housing 124.

[0024] An interface arrangement 130 selectively rotationally couples the first and second clutch housings 122, 124. In certain implementations, the interface arrangement 130 is biased towards rotationally coupling the first and second clutch housings 122, 124. In certain implementations, the first and second clutch housings 122, 124 are disengaged when the torque of the input shaft 104 overpowers the bias of the interface arrangement 130.

[0025] In certain implementations, the shaft 104 is partially supported by a housing 118 of the torque vectoring arrangement 110. For example, an arm may extend downwardly from the housing 118 to reach the input shaft 104. In certain examples, the housing 118 (e.g., the arm) may hold the bearing arrangement 128 within which the input shaft 104 rotates. In certain examples, the second clutch housing 124 also may be supported by the housing 118. In an example, the second clutch housing 124 also may rotate within the bearing arrangement 128.

[0026] In certain implementations, the interface gear 126 is a separate component mounted over the input shaft 104 to be rotatable relative to the input shaft 104. In certain examples, the interface gear 126 is mounted coaxial with the shaft 104. The interface gear 126 is radially offset from the input shaft 104 to rotate independent of the input shaft 104. In certain implementations, the interface gear 126 is supported by the housing 118 of the torque vectoring arrangement 110 (e.g., at the bearing arrangement 128). In certain examples, the interface gear 126 is axially fixed relative to the input shaft 104. In certain implementations, the interface gear 126 is keyed (e.g., see key 127), splined, or otherwise rotationally fixed relative to the second clutch housing 124.

[0027] In certain implementations, the interface gear 126 enables the first and second clutch housings 122, 124 to be disposed at a location offset from the input gear 106. In certain examples, the first and second clutch housings 122, 124 are disposed at an opposite side of the input gear 106 from the prime mover 102. The interface gear 126 provides the torque transfer between the second clutch housing 124 and the input gear 106 while isolating both from the torque of the shaft 104. In certain examples, the interface gear 126 includes an axial extension that passes through the bearing arrangement 128 and couples to the second clutch housing 124. Coaxially mounting the interface gear 126 enables a one-piece shaft 104 to extend past the input gear 106 and the second clutch housing 124 and through the first clutch housing 122.

[0028] FIGS. 2-5 illustrate a first example implementation 120 A of a torque limiting arrangement 120 suitable for use in the vehicle system 100 of FIG. 1. In the first example implementations 120 A, the interface arrangement 130 includes one or more biased interface members 132 carried by the second clutch housing 124 that selectively couple together the first and second clutch housing 122, 124 for unified rotation. In certain examples, a separateinterface gear 126 is coupled to the second clutch housing 124 for rotation therewith as will be described in more detail herein.

[0029] The first clutch housing 122 of the torque limiting arrangement 120 A includes a first interface plate 140 defining one or more recesses or apertures 142 (e.g., see FIG. 3). The first interface plate 140 also defines a mounting opening 144 through which the first interface plate 140 attaches to the input shaft 104. For example, the input shaft 104 may extend through the mounting opening 144 and be secured with a snap-ring 146 or other retention member. In certain implementations, the first interface plate 140 may be splined (e.g., see splines 148), keyed, or otherwise rotationally fixed relative to the input shaft 104. In certain implementations, the gear 126 includes an axial extension 125 that extends along the input shaft 104 and is supported by the bearing arrangement 128. In certain examples, the second clutch housing 124 is splined, keyed, or otherwise fixed to the axial extension 125 of the gear 126.

[0030] The second clutch housing 124 of the torque limiting arrangement 120 A includes a housing 150 holding one or more interface members 132. The housing 150 is mounted around the input shaft 104, but is configured to rotate independent of the input shaft 104. In the example shown in FIG. 4, the interface members 132 are disposed in a ring. Other configurations are possible. In certain implementations, each interface member 132 includes a ball 152 or other structure sized to seat within the recesses or apertures 142 of the first interface plate 140 (e.g., see FIG. 2). In certain implementations, the ball 152 is biased into seated engagement with the recesses or apertures 142. In the example shown, the ball 152 is biased by a biasing member 154 (e.g., a helical spring) disposed within the housing 150.

[0031] In accordance with aspects of the disclosure, the biasing force of the biasing member 154 is selected to hold the ball 152 within the recess or aperture 142 of the first interface plate 140 while the first clutch housing 122 and input shaft 104 are rotating below a predetermined torque threshold. The biasing force is further selected to be overcome when the torque applied by the input shaft 104 to the first clutch housing 122 exceeds the predetermined torque threshold (e.g., see FIG. 5). For example, when the first interface plate 140 of the first clutch housing 122 begins rotating at above the predetermined torque threshold, the ball 152 or other component will cam, slide, or otherwise move out of the corresponding recess or aperture 142 and glide instead over the axial end of the first interface plate 140.

[0032] In certain implementations, the interface gear 126 is a separate component mounted over the input shaft 104. The interface gear 126 is radially offset from the input shaft 104 to rotate independent of the input shaft 104. In certain implementations, the interface gear 126 issupported by the housing 118 of the torque vectoring arrangement 110 (e.g., at the bearing arrangement 128). In certain implementations, the interface gear 126 is keyed (e.g., see key 127), splined, or otherwise rotationally fixed relative to the second clutch housing 124.

[0033] FIGS. 6-11 illustrate a second example implementation 120B of a torque limiting arrangement 120 suitable for use in the vehicle system 100 of FIG. 1. In the second example implementations 120B, the interface arrangement 130 includes contoured surfaces 134, 136 (e.g., see FIGS. 7 and 8) defined by the first and second clutch housings 122, 124, respectively, that selectively mesh together for unified rotation. In certain examples, a separate interface gear 126 is coupled to the second clutch housing 124 for rotation therewith as will be described in more detail herein.

[0034] The first clutch housing 122 of the torque limiting arrangement 120B includes an second interface plate 160 defining a first contoured surface 134 (e.g., see FIG. 7). The second interface plate 160 also defines a mounting opening 164 through which the second interface plate 160 attaches to the input shaft 104. For example, the input shaft 104 may extend through the mounting opening 164 and be secured with a snap-ring 168 or other retention member. In certain implementations, the second interface plate 160 may be splined (e.g., see splines 169), keyed, or otherwise rotationally fixed relative to the input shaft 104.

[0035] In certain implementations, the contoured surface 134 defines one or more recesses or apertures 162 facing towards the second clutch housing 124. In certain examples, the recesses or apertures 162 are disposed in a ring. Other configurations are possible. In certain implementations, the contoured surface 134 defines one or more ramped surfaces 166 that face towards the second clutch housing 124. In certain examples, the ramped surfaces 166 are disposed in a ring. In certain examples, the ramped surfaces 166 cooperate to define a first track (e.g., a continuous track). In the example shown in FIG. 7, the recesses or apertures 162 form an outer ring about the continuous track of ramped surfaces 166.

[0036] The second clutch housing 124 of the torque limiting arrangement 120B includes a housing arrangement 170 defining a second contoured surface 136 (e.g., see FIG. 8). The housing 170 is mounted around the input shaft 104, but is configured to rotate independent of the input shaft 104. In certain implementations, the housing arrangement 170 is mounted to the axial extension 125 of the interface gear 106. For example, the housing arrangement 170 can be splined, keyed, or otherwise meshed with the interface gear 106. In certain implementations, the housing arrangement 170 includes a first housing piece 170A and a second housing piece 170B. One or more biasing members 178 are disposed between the first and second housing pieces 170A, 170B. In certain examples, the second housing piece 170Bis braced against or otherwise abuts the housing 118 (e.g., the arm holding the bearing arrangement 128) of the torque vectoring arrangement 110. Accordingly, the biasing member 178 biases the first housing piece 170A away from the second housing piece 170B and towards the first clutch housing 122.

[0037] The contoured surface 136 is defined by the first housing piece 170A and faces towards the first clutch housing 122. In certain implementations, the contoured surface 136 defines one or more pegs or other protrusions 172 extending towards the first clutch housing 122. In certain examples, the protrusions 172 are disposed in a ring. Other configurations are possible. In certain implementations, the contoured surface 136 defines one or more ramped surfaces 176 that face towards the first clutch housing 122. In certain examples, the ramped surfaces 176 are disposed in a ring. In certain examples, the ramped surfaces 176 cooperate to define a first track (e.g., a continuous track). In certain examples, the ramped surfaces 176 are shaped and sized to oppose the ramped surfaces 166 of the first clutch housing 122. In the example shown in FIG. 8, the protrusions 172 form an outer ring about the continuous track of ramped surfaces 176.

[0038] In accordance with aspects of the disclosure, the biasing force of the biasing member 178 is selected to hold the protrusions 172 of the second clutch housing 124 within the recesses or apertures 162 of the first clutch housing 122 while the first clutch housing 122 and input shaft 104 are rotating below a predetermined torque threshold . The biasing force is further selected to be overcome when the torque applied by the input shaft 104 to the first clutch housing 122 exceeds the predetermined torque threshold (e.g., see FIGS. 10 and 11). For example, when the second interface plate 160 of the first clutch housing 122 begins rotating at above the predetermined torque threshold, the ramped surfaces 166, 176 of the first and second clutch housings 122, 124 cam over each other to push the first housing piece 170A ofthe second clutch housing 124 away from the first clutch housing 122, thereby withdrawing the protrusions 172 from the recesses or apertures 162.

[0039] Example aspects of the disclosure are described in the following aspects:

[0040] Aspect 1. A torque vectoring system comprising:

[0041] a main housing arrangement including a first axle interface, a second axle interface, and an engine input gear operationally coupled to the first and second axle interfaces to apply torque to axles connected thereto;

[0042] a torque limiter disposed between the engine input gear and an engine shaft, the torque limiter including:

[0043] a first clutch housing configured to be rotationally fixed to the engine shaft to rotate therewith;

[0044] a second clutch housing configured to be selectively coupled to the first clutch housing, the second clutch housing rotating with the first clutch housing when coupled to the first clutch housing, the second clutch housing allowing the first clutch housing to rotate independent of the second clutch housing when uncoupled;

[0045] an interface arrangement configured to selectively couple the first and second clutch housing, the interface arrangement including an interface member coupled to the second clutch housing that is biased towards engagement with the first clutch housing; and

[0046] a gear coupled to the second clutch housing to rotate therewith, the gear being meshed with the engine input gear.

[0047] Aspect 2. The torque vectoring system of aspect 1, wherein the interface member includes a ball plunger.

[0048] Aspect 3. The torque vectoring system of aspect 2, wherein the bias is applied to the ball plunger by a helical spring.

[0049] Aspect 4. The torque vectoring system of aspect 1, wherein the interface member includes a cam plate.

[0050] Aspect 5. The torque vectoring system of aspect 4, wherein the bias is applied to the cam plate by a wave spring arrangement.

[0051] Aspect 6. The torque vectoring system of aspect 1, wherein the gear is a separate component from the second clutch housing.

[0052] Aspect 7. The torque vectoring system of aspect 6, wherein the gear is keyed to the second clutch housing.

[0053] Aspect 8. The torque vectoring system of aspect 1, wherein the gear is monolithically formed with the second clutch housing.

[0054] Aspect 9. The torque vectoring system of aspect 1 , wherein the first clutch housing is splined or keyed to the engine shaft.

[0055] Aspect 10. The torque vectoring system of aspect 1, wherein the main housing arrangement includes a bearing arrangement that supports the gear and supports the engine shaft.

[0056] Aspect 11. The torque vectoring system of aspect 10, wherein the first and second clutch housings are disposed at an opposite side of the bearing arrangement from the engine input gear.

[0057] Aspect 12. The torque vectoring system of aspect 11, wherein the gear, the first clutch housing, and the second clutch housing are mounted coaxial with the engine shaft.

[0058] Aspect 13. A torque limiter for a torque vectoring system, the torque limiter comprising:

[0059] a first clutch housing extending axially between respective first and second ends, the first clutch housing defining a first axial passage therethrough between the first and second ends of the first clutch housing, the first clutch housing defining a first part of an interface arrangement;

[0060] a second clutch housing arrangement including a second clutch housing extending axially between respective first and second ends, the second clutch housing defining a second axial passage therethrough between the first and second ends of the second clutch housing, the second clutch housing arrangement including a second part of the interface arrangement, the second part of the interface arrangement being movable between an engaged position in which the first and second clutch housings rotate in unison and a disengaged position in which the first clutch housing rotates independent of the second clutch housing; and

[0061] a biasing member carried by the second clutch housing, the biasing member biasing the second part of the interface arrangement towards the engaged position.

[0062] Aspect 14. The torque limiter of aspect 13, further comprising an interface gear rotationally fixed to the second clutch housing, the interface gear including externally facing gear teeth that are axially offset from the second clutch housing.

[0063] Aspect 15. The torque limiter of aspect 14, wherein the interface gear is coaxial with the second clutch housing, and wherein the interface gear extends between respective first and second ends, the first end of the interface gear being rotationally fixed to the second clutch housing and the second end of the interface gear including the gear teeth.

[0064] Aspect 16. The torque limiter of aspect 15, wherein the first end of the interface gear is keyed to second end of the second clutch housing.

[0065]

[0066] Aspect 17. The torque limiter of aspect 15, wherein the first end of the interface gear is splined to an interior of the second clutch housing.

[0067] Aspect 18. A torque limiter system comprising:

[0068] an engine shaft;

[0069] an interface gear mounted coaxially over the engine shaft to rotate independent of the engine shaft, the interface gear including gear teeth;

[0070] a first clutch housing mounted coaxially over the engine shaft, the first clutch housing being attached to the engine shaft to rotate in unison with the engine shaft;

[0071] a second clutch housing arrangement mounted coaxially over the engine shaft, the second clutch housing arrangement including a second clutch housing attached to the interface gear to rotate in unison with the interface gear, the second clutch housing arrangement also including an interface member movable between a disengaged position and an engaged position, wherein the first and second clutch housings rotate in unison when the interface member is disposed in the engaged position and the first clutch housing rotates independent of the second clutch housing when the interface member is disposed in the disengaged position, wherein the interface member is biased towards the engaged position.

[0072] Aspect 19. The torque vectoring system of aspect 18, wherein an axial end of the interface gear faces an axial end of the second clutch housing.

[0073] Aspect 20. The torque vectoring system of aspect 18, wherein the interface gear includes an axial extension that extends through at least a portion of the second clutch housing.

[0074] Having described the preferred aspects and implementations of the present disclosure, modifications and equivalents of the disclosed concepts may readily occur to one skilled in the art. However, it is intended that such modifications and equivalents be included within the scope of the claims which are appended hereto.

Claims

What is claimed is:

1. A torque vectoring system comprising: a main housing arrangement including a first axle interface, a second axle interface, and an engine input gear operationally coupled to the first and second axle interfaces to apply torque to axles connected thereto; a torque limiter disposed between the engine input gear and an engine shaft, the torque limiter including: a first clutch housing configured to be rotationally fixed to the engine shaft to rotate therewith; a second clutch housing configured to be selectively coupled to the first clutch housing, the second clutch housing rotating with the first clutch housing when coupled to the first clutch housing, the second clutch housing allowing the first clutch housing to rotate independent of the second clutch housing when uncoupled; an interface arrangement configured to selectively couple the first and second clutch housing, the interface arrangement including an interface member coupled to the second clutch housing that is biased towards engagement with the first clutch housing; and a gear coupled to the second clutch housing to rotate therewith, the gear being meshed with the engine input gear.

2. The torque vectoring system of claim 1, wherein the interface member includes a ball plunger.

3. The torque vectoring system of claim 2, wherein the bias is applied to the ball plunger by a helical spring.

4. The torque vectoring system of claim 1, wherein the interface member includes a cam plate.

5. The torque vectoring system of claim 4, wherein the bias is applied to the cam plate by a wave spring arrangement.

6. The torque vectoring system of claim 1, wherein the gear is a separate component from the second clutch housing.

7. The torque vectoring system of claim 6, wherein the gear is keyed to the second clutch housing.

8. The torque vectoring system of claim 1, wherein the gear is monolithically formed with the second clutch housing.

9. The torque vectoring system of claim 1, wherein the first clutch housing is splined or keyed to the engine shaft.

10. The torque vectoring system of claim 1, wherein the main housing arrangement includes a bearing arrangement that supports the gear and supports the engine shaft.

11. The torque vectoring system of claim 10, wherein the first and second clutch housings are disposed at an opposite side of the bearing arrangement from the engine input gear.

12. The torque vectoring system of claim 11, wherein the gear, the first clutch housing, and the second clutch housing are mounted coaxial with the engine shaft.

13. A torque limiter for a torque vectoring system, the torque limiter comprising: a first clutch housing extending axially between respective first and second ends, the first clutch housing defining a first axial passage therethrough between the first and second ends of the first clutch housing, the first clutch housing defining a first part of an interface arrangement; a second clutch housing arrangement including a second clutch housing extending axially between respective first and second ends, the second clutch housing defining a second axial passage therethrough between the first and second ends of the second clutch housing, the second clutch housing arrangement including a second part of the interface arrangement, the second part of the interface arrangement being movable between an engaged position in which the first and second clutch housings rotate in unison and a disengaged position in which the first clutch housing rotates independent of the second clutch housing; anda biasing member carried by the second clutch housing, the biasing member biasing the second part of the interface arrangement towards the engaged position.

14. The torque limiter of claim 13, further comprising an interface gear rotationally fixed to the second clutch housing, the interface gear including externally facing gear teeth that are axially offset from the second clutch housing.

15. The torque limiter of claim 14, wherein the interface gear is coaxial with the second clutch housing, and wherein the interface gear extends between respective first and second ends, the first end of the interface gear being rotationally fixed to the second clutch housing and the second end of the interface gear including the gear teeth.

16. The torque limiter of claim 15, wherein the first end of the interface gear is keyed to second end of the second clutch housing.

17. The torque limiter of claim 15, wherein the first end of the interface gear is splined to an interior of the second clutch housing.

18. A torque limiter system comprising: an engine shaft; an interface gear mounted coaxially over the engine shaft to rotate independent of the engine shaft, the interface gear including gear teeth; a first clutch housing mounted coaxially over the engine shaft, the first clutch housing being attached to the engine shaft to rotate in unison with the engine shaft; a second clutch housing arrangement mounted coaxially over the engine shaft, the second clutch housing arrangement including a second clutch housing attached to the interface gear to rotate in unison with the interface gear, the second clutch housing arrangement also including an interface member movable between a disengaged position and an engaged position, wherein the first and second clutch housings rotate in unison when the interface member is disposed in the engaged position and the first clutch housing rotates independent of the second clutch housing when the interface member is disposed in the disengaged position, wherein the interface member is biased towards the engaged position.

19. The torque vectoring system of claim 18, wherein an axial end of the interface gear faces an axial end of the second clutch housing.

20. The torque vectoring system of claim 18, wherein the interface gear includes an axial extension that extends through at least a portion of the second clutch housing.

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