WO2015130204A1 - A torque vectoring device - Google Patents
A torque vectoring device Download PDFInfo
- Publication number
- WO2015130204A1 WO2015130204A1 PCT/SE2014/050525 SE2014050525W WO2015130204A1 WO 2015130204 A1 WO2015130204 A1 WO 2015130204A1 SE 2014050525 W SE2014050525 W SE 2014050525W WO 2015130204 A1 WO2015130204 A1 WO 2015130204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- planetary gear
- planetary
- torque vectoring
- teeth
- gears
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
- F16H2048/368—Differential gearings characterised by intentionally generating speed difference between outputs using additional orbital gears in combination with clutches or brakes
Definitions
- the present invention relates to a torque vectoring device for directing different torques at will to the two wheels of a wheel axle on a road vehicle.
- torque vectoring devices In a road vehicle -especially a car - it is advantageous to be able to freely distribute drive torque to different wheels in order to enhance the driving dynamics of the vehicle, Devices for accomplishing this desired result is in the art referred to as torque vectoring devices.
- Torque vectoring devices may be used in either two-wheel drive vehicles or four-wheel drive vehicles, although the latter case must be regarded as more common. It can also be used for either rear or front drive shafts or in the propeller shaft for distributing torque between the front and rear drive shafts. In the present specification an example with the rear drive shaft of a rear- or all- wheel drive vehicle has been used. The torque is here distributed between the two wheels of a rear shaft provided with a conventional, central differential. Many other uses of a torque vectoring device according to the invention may, however, be envisaged.
- the desired torque difference may be in the order of for example 10 %.
- the main object of the invention is to provide a single-sided torque vectoring device with a view to minimize size and cost and to increase modularity.
- two sun gears which are connected - directly or indirectly - to each of two coaxial wheel half-axles, are coaxial, have practically the same diameter, and are provided with the same number of teeth on their circumferences,
- coaxial planetary gear sets each having two planetary gears and being rotatably arranged in a fixed planetary carrier, the two planetary gears in each set having different numbers of teeth in engagement with the teeth of the sun gears, and
- a limited slip coupling for connecting at will the two planetary gears in each planetary gear set on a common planetary gear shaft.
- one sun gear is connected to a wheel half-axle and the other sun gear is connected to a differential case, into which said wheel half axle extends.
- a first planetary gear is journaled on the planetary gear shaft and a second planetary gear is connected to the shaft, the limited slip coupling being arranged at the end of the planetary gear shaft.
- a plurality of planetary gear sets with limited slip couplings are arranged around the sun gears.
- six planetary gear sets with limited slip couplings are equidistantly distributed around the sun gears.
- the two planetary gears in each gear set have different numbers of teeth in engagement with the sun gears, which in essence provides the torque vectoring effect.
- either a first planetary gear or a second planetary gear in a planetary gear set has a lower number of teeth than a second one.
- each second planetary gear set may be of the first type defined above and the others of the second type.
- three limited slip couplings connected to each second planetary gear set are operated for accomplishing a positive torque and the three others for accomplishing a negative torque.
- the lower number of teeth on the respective planetary gears may be ten and the higher number eleven.
- Figs la-c show examples of rear wheel drive (RWD) vehicle architectures including a torque vectoring device according to the invention
- Figs 2a-c show examples of forward wheel drive (FWD) vehicle architectures including a torque vectoring device according to the invention
- Fig 3 is a rather schematic, cross sectional illustration of a torque vectoring device according to the invention.
- Fig 4 is an isometric view of a practical embodiment of a torque vectoring device according to the invention. Detailed Description of Embodiments
- Torque vectoring may be seen as the art of distributing torque to different wheels of a road vehicle - a car.
- a torque vectoring device may especially be used to distribute torque to each of the two wheels on a front axle and/or a rear axle.
- Fig la schematically illustrates a rear wheel drive (RWD) vehicle with an engine 1, a clutch/gearbox 2, and front wheels 4.
- a propeller shaft 5 transmits torque to a rear differential 6, transmitting torque to the rear wheels 7.
- a torque vectoring device 8 according to the invention can, as shown in Fig la, be functionally arranged between the right hand side of the case of the differential 6 and the right half-axle 9 to the right rear wheel 7.
- the torque vectoring device 8 may be arranged to the left of the differential 6 on the left half-axle 9 to the left rear wheel 7.
- the torque vectoring device 8 in conjunction with a differential may be arranged at either of the two half-axles 10 to the front wheels 4.
- the engine 1 is shown as a longitudinal engine but may equally well be a transverse engine.
- a torque vectoring device according to the invention in a front wheel drive (FWD) vehicle are shown in Figs 2a-c.
- the same reference numerals as in Figs la-c are used.
- the engine 1 is here depicted as a transverse engine.
- the torque vectoring device 8 is associated with the left and the right half-axle 10, respectively.
- Fig 2c is meant to illustrate that a torque vectoring device 8 together with a differential may even be placed in the undriven rear axle 9.
- Figs 1 and 2 show examples of two wheel drive vehicles, but the use of all wheel drive (A WD) vehicles is increasing. As is well known in the art, one or more AWD-couplings are used in the latter type of vehicles. For the sake of clarity, no such coupling is depicted.
- Fig 3 is a schematical cross-sectional view
- Fig 4 is an isometric view of a possible practical embodiment.
- the same reference numerals are used for like parts in both figures.
- a typical vehicle differential comprises as its main parts a driven crown wheel connected to a differential case, containing planet gears as well as sun gears, which in turn are connected to the two drive axles or half-axles to the drive wheels of the vehicle.
- the differential is contained in a fixed differential housing.
- a torque vectoring device is functionally placed between the differential case and one of the drive axles.
- Figs 3 and 4 Shown in Figs 3 and 4 are thus a differential case 15 and a drive axle 16, connected to the differential case via the differential gears therein but rotatable in relation thereto.
- a first sun gear 17 is attached to the drive axle 16, and a second sun gear 18 is attached to the differential case 15.
- the two sun gears 17, 18 have practically the same outer diameter and the same number of teeth on their circumferences.
- the teeth are preferably helical teeth.
- planetary gears 19, 20 Cooperating with the sun gears 17, 18 are planetary gears 19, 20.
- One planetary gear set or compound comprises a first planetary gear 19 and a second planetary gear 20 on a common planetary gear shaft 21.
- the planetary gear shafts 21 are rotatably journaled in a fixed planetary carrier 22, which for example may be attached to the differential housing.
- the planetary gears 19 and 20 have a different number of teeth, for example ten teeth on each second planetary gear 19 and eleven teeth on each secondary planetary gear 20 and inversely in the remaining planetary gear sets. (The slight difference is visible in Fig 4, where in the upper gear set planetary gear 19 has ten teeth and planetary gear 20 has eleven teeth, whereas in the lower gear set planetary gear 19 has eleven teeth and planetary gear 20 has ten teeth.)
- Each of the second planetary gears 20 is connected to its planetary gear shaft 21, whereas each of the first planetary gears 19 is journaled in relation thereto by means of a radial bearing 23.
- Each planetary gear shaft 21 is at its end provided with a limited slip coupling 24, having a hydraulically actuated friction disc package 25.
- a disc drum 26 having inner discs is connected to the first planetary gear 19, whereas the planetary gear shaft 21 is provided with outer discs in the coupling 24.
- the disclosed torque vectoring device may comprise a number of planetary gear sets 19, 20, for example six gear sets, each with a limited slip coupling 24, two sun gears 17, 18, and a planetary carrier 22.
- the sun gears 17, 18 have the same number of teeth, whereas the planetary gears in each planetary gear set 19, 20 have different number of teeth but the same centre distance.
- One of the sun gears 18 is connected to the differential case 15 and the other 17 to the drive axle 16.
- the sun gear 18 may be connected to a second axle.
- a torque vectoring ratio can be obtained. This ratio can be positive or negative depending on the relative position of the planetary gears 19, 20 in the used gear set.
Abstract
A torque vectoring device for directing torque at will to the two wheels of a wheel axle on a road vehicle has two sun gears (17, 18), which are connected – directly or indirectly – to each of two coaxial wheel half-axles (16), are coaxial, have the same diameter, and are provided with the same number of teeth on their circumferences. Coaxial planetary gear sets (19, 20) each have two planetary gears (19, 20) and are rotatably arranged in a fixed planetary carrier (22), the two planetary gears in each set having different numbers of teeth in engagement with the teeth of the sun gears (17, 18). A limited slip coupling (24) for connecting at will the two planetary gears (18, 19) in each planetary gear set is provided on a common planetary gear shaft (21).
Description
A TORQUE VECTORING DEVICE
Technical Field
The present invention relates to a torque vectoring device for directing different torques at will to the two wheels of a wheel axle on a road vehicle.
Background of the Invention
In a road vehicle -especially a car - it is advantageous to be able to freely distribute drive torque to different wheels in order to enhance the driving dynamics of the vehicle, Devices for accomplishing this desired result is in the art referred to as torque vectoring devices.
Torque vectoring devices may be used in either two-wheel drive vehicles or four-wheel drive vehicles, although the latter case must be regarded as more common. It can also be used for either rear or front drive shafts or in the propeller shaft for distributing torque between the front and rear drive shafts. In the present specification an example with the rear drive shaft of a rear- or all- wheel drive vehicle has been used. The torque is here distributed between the two wheels of a rear shaft provided with a conventional, central differential. Many other uses of a torque vectoring device according to the invention may, however, be envisaged.
In order to obtain the desired result with regard to the driving dynamics, it may in certain driving situations be advantageous to provide a drive wheel with a positive torque or a negative torque in relation to the other drive wheel on the drive shaft. The desired torque difference may be in the order of for example 10 %.
The main object of the invention is to provide a single-sided torque vectoring device with a view to minimize size and cost and to increase modularity.
The Invention
This object is according to the invention accomplished in a torque vectoring device as defined above by the provision of
two sun gears, which are connected - directly or indirectly - to each of two coaxial wheel half-axles, are coaxial, have practically the same diameter, and are provided with the same number of teeth on their circumferences,
coaxial planetary gear sets, each having two planetary gears and being rotatably arranged in a fixed planetary carrier, the two planetary gears in each set having different numbers of teeth in engagement with the teeth of the sun gears, and
a limited slip coupling for connecting at will the two planetary gears in each planetary gear set on a common planetary gear shaft.
Preferably, one sun gear is connected to a wheel half-axle and the other sun gear is connected to a differential case, into which said wheel half axle extends.
Alternatives are, however, possible.
In a preferred embodiment a first planetary gear is journaled on the planetary gear shaft and a second planetary gear is connected to the shaft, the limited slip coupling being arranged at the end of the planetary gear shaft.
Preferably, a plurality of planetary gear sets with limited slip couplings are arranged around the sun gears. Most preferred, six planetary gear sets with limited slip couplings are equidistantly distributed around the sun gears.
As stated, the two planetary gears in each gear set have different numbers of teeth in engagement with the sun gears, which in essence provides the torque vectoring effect. In order to provide a positive or a negative torque vectoring effect, either a first planetary gear or a second planetary gear in a planetary gear set has a lower number of teeth than a second one.
With six planetary gear sets provided around the sun gears, each second planetary gear set may be of the first type defined above and the others of the second type. In such an arrangement three limited slip couplings connected to each second planetary gear set are operated for accomplishing a positive torque and the three others for accomplishing a negative torque.
The lower number of teeth on the respective planetary gears may be ten and the higher number eleven.
Brief Description of the Drawings
The invention will be described in further detail below under reference to the accompanying drawings, in which
Figs la-c show examples of rear wheel drive (RWD) vehicle architectures including a torque vectoring device according to the invention,
Figs 2a-c show examples of forward wheel drive (FWD) vehicle architectures including a torque vectoring device according to the invention,
Fig 3 is a rather schematic, cross sectional illustration of a torque vectoring device according to the invention, and
Fig 4 is an isometric view of a practical embodiment of a torque vectoring device according to the invention.
Detailed Description of Embodiments
Torque vectoring may be seen as the art of distributing torque to different wheels of a road vehicle - a car. A torque vectoring device may especially be used to distribute torque to each of the two wheels on a front axle and/or a rear axle.
Examples of vehicle architectures with torque vectoring devices are shown in
Figs 1 and 2.
Fig la schematically illustrates a rear wheel drive (RWD) vehicle with an engine 1, a clutch/gearbox 2, and front wheels 4. A propeller shaft 5 transmits torque to a rear differential 6, transmitting torque to the rear wheels 7.
A torque vectoring device 8 according to the invention can, as shown in Fig la, be functionally arranged between the right hand side of the case of the differential 6 and the right half-axle 9 to the right rear wheel 7.
Alternatively, as shown in Fig lb, the torque vectoring device 8 may be arranged to the left of the differential 6 on the left half-axle 9 to the left rear wheel 7.
As a further alternative, as shown in Fig lc, the torque vectoring device 8 in conjunction with a differential may be arranged at either of the two half-axles 10 to the front wheels 4.
The engine 1 is shown as a longitudinal engine but may equally well be a transverse engine.
Examples of the use of a torque vectoring device according to the invention in a front wheel drive (FWD) vehicle are shown in Figs 2a-c. The same reference numerals as in Figs la-c are used. The engine 1 is here depicted as a transverse engine. In Figs 2a and 2b the torque vectoring device 8 is associated with the left and the right half-axle 10, respectively. Fig 2c is meant to illustrate that a torque vectoring device 8 together with a differential may even be placed in the undriven rear axle 9.
Figs 1 and 2 show examples of two wheel drive vehicles, but the use of all wheel drive (A WD) vehicles is increasing. As is well known in the art, one or more AWD-couplings are used in the latter type of vehicles. For the sake of clarity, no such coupling is depicted.
A torque vectoring device according to the invention will now be described with reference to Figs 3 and 4. Fig 3 is a schematical cross-sectional view, whereas Fig 4 is an isometric view of a possible practical embodiment. The same reference numerals are used for like parts in both figures.
As is well known in the art, a typical vehicle differential comprises as its main parts a driven crown wheel connected to a differential case, containing planet gears as
well as sun gears, which in turn are connected to the two drive axles or half-axles to the drive wheels of the vehicle. The differential is contained in a fixed differential housing.
A torque vectoring device according to the invention is functionally placed between the differential case and one of the drive axles.
Shown in Figs 3 and 4 are thus a differential case 15 and a drive axle 16, connected to the differential case via the differential gears therein but rotatable in relation thereto.
A first sun gear 17 is attached to the drive axle 16, and a second sun gear 18 is attached to the differential case 15. The two sun gears 17, 18 have practically the same outer diameter and the same number of teeth on their circumferences. The teeth are preferably helical teeth.
Cooperating with the sun gears 17, 18 are planetary gears 19, 20. One planetary gear set or compound comprises a first planetary gear 19 and a second planetary gear 20 on a common planetary gear shaft 21. There may be six such planetary gear sets equidistantly distributed around the sun gears 17, 18. The planetary gear shafts 21 are rotatably journaled in a fixed planetary carrier 22, which for example may be attached to the differential housing.
Contrary to the sun gears 17, 18, the planetary gears 19 and 20 have a different number of teeth, for example ten teeth on each second planetary gear 19 and eleven teeth on each secondary planetary gear 20 and inversely in the remaining planetary gear sets. (The slight difference is visible in Fig 4, where in the upper gear set planetary gear 19 has ten teeth and planetary gear 20 has eleven teeth, whereas in the lower gear set planetary gear 19 has eleven teeth and planetary gear 20 has ten teeth.)
Each of the second planetary gears 20 is connected to its planetary gear shaft 21, whereas each of the first planetary gears 19 is journaled in relation thereto by means of a radial bearing 23.
Each planetary gear shaft 21 is at its end provided with a limited slip coupling 24, having a hydraulically actuated friction disc package 25. A disc drum 26 having inner discs is connected to the first planetary gear 19, whereas the planetary gear shaft 21 is provided with outer discs in the coupling 24. When the coupling 24 is
hydraulically actuated, the friction disc package 25 is engaged, so that also the first planetary gear 19 is connected to the planetary gear shaft 21 and rotates therewith.
Only the internal, schematic design of the limited slip couplings 24 is shown for the sake of simplicity. For the actuation of the limited slip couplings 24 use may be made of a hydraulic system as disclosed in WO 2011/043722, to which reference is
made. Other systems may equally well be used. Further, electric or other actuation is feasible.
Summarizing: the disclosed torque vectoring device may comprise a number of planetary gear sets 19, 20, for example six gear sets, each with a limited slip coupling 24, two sun gears 17, 18, and a planetary carrier 22. The sun gears 17, 18 have the same number of teeth, whereas the planetary gears in each planetary gear set 19, 20 have different number of teeth but the same centre distance.
One of the sun gears 18 is connected to the differential case 15 and the other 17 to the drive axle 16. Alternatively, the sun gear 18 may be connected to a second axle.
Due to the different teeth number in each planetary gear set 19, 20 a torque vectoring ratio can be obtained. This ratio can be positive or negative depending on the relative position of the planetary gears 19, 20 in the used gear set.
If ten and eleven teeth are used for the planetary gears 19, 20, respectively, a torque vectoring effect of about plus or minus 10 % will be obtained.
If six planetary gear sets 19, 20 are provided, three of them carry load during torque vectoring, when the gears in the respective planetary gear sets are connected via the limited slip couplings 24.
Modifications are possible within the scope of the appended claims.
Claims
1. A torque vectoring device for directing torque at will to the two wheels of a wheel axle on a road vehicle, characterized by
two sun gears (17, 18), which are connected - directly or indirectly - to each of two coaxial wheel half-axles (16), are coaxial, have practically the same diameter, and are provided with the same number of teeth on their circumferences,
coaxial planetary gear sets (19, 20), each having two planetary gears (19, 20) and being rotatably arranged in a fixed planetary carrier (22), the two planetary gears in each set having different numbers of teeth in engagement with the teeth of the sun gears (17, 18), and
a limited slip coupling (24) for connecting at will the two planetary gears (18, 19) in each planetary gear set on a common planetary gear shaft (21).
2. A torque vectoring device according to claim 1, wherein one sun gear (17) is connected to a wheel half-axle (16) and the other sun gear (18) is connected to a differential case (15), into which said wheel half axle (16) extends.
3. A torque vectoring device according to claim 1, wherein a first planetary gear (19) is journaled on the planetary gear shaft (21) and a second planetary gear (20) is connected to the shaft (21), the limited slip coupling (24) being arranged at the end of the planetary gear shaft (21).
4. A torque vectoring device according to claim 1, wherein a plurality of planetary gear sets (19, 20) with limited slip couplings (24) are arranged around the sun gears (17, 18).
5. A torque vectoring device according to claim 4, wherein six planetary gear sets (19, 20) with limited slip couplings (24) are equidistantly distributed around the sun gears (17, 18).
6. A torque vectoring device according to claim 1, wherein a first planetary gear (19) in a planetary gear set (19, 20) has a lower number of teeth than a second one (20).
7. A torque vectoring device according to claim 1, wherein a second planetary gear (20) in a planetary gear set (19, 20) has a lower number of teeth than the first one
(19).
8. A torque vectoring device according to claim 1, wherein each second planetary gear set (19, 20) is of the type defined in claim 6 and the others of the type defined in claim 7.
9. A torque vectoring device according to any of claims 5 and 6, wherein the lower number of teeth on the respective planetary gears (19, 20) is ten and the higher number eleven.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450226-4 | 2014-02-27 | ||
| SE1450226 | 2014-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015130204A1 true WO2015130204A1 (en) | 2015-09-03 |
Family
ID=54009412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2014/050525 WO2015130204A1 (en) | 2014-02-27 | 2014-04-29 | A torque vectoring device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2015130204A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825748A (en) * | 2018-08-23 | 2018-11-16 | 曹洪 | A kind of volitional check differential when increases the differential mechanism of torque |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546733A1 (en) * | 1991-11-29 | 1993-06-16 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Drive power distribution control system for vehicle |
| DE19807023A1 (en) * | 1997-02-21 | 1998-09-03 | Tochigi Fuji Sangyo Kk | Coupling mechanism with pair of friction couplings for differential drive |
| EP1650072A2 (en) * | 2004-10-21 | 2006-04-26 | Fuji Jukogyo Kabushiki Kaisha | Driving force distribution control apparatus of vehicle |
| JP2008261453A (en) * | 2007-04-13 | 2008-10-30 | Honda Motor Co Ltd | Driving force distribution device for vehicle |
| DE102008039926A1 (en) * | 2008-08-27 | 2010-03-04 | Magna Powertrain Ag & Co Kg | Differential gear unit has active controller for torque distribution, which has input element driven by rotary motion, and differential gear is coupled to input element, where two output shafts are coupled with differential gear |
| US20100203999A1 (en) * | 2007-09-10 | 2010-08-12 | Toyota Jidosha Kabushiki Kaisha | Driving force distribution mechanism |
| US20100240485A1 (en) * | 2009-02-20 | 2010-09-23 | Audi Ag | Axle Drive Device for an Axle of a Motor Vehicle, as well as Motor Vehicle |
| US20110087409A1 (en) * | 2008-04-24 | 2011-04-14 | Lars Severinsson | Torque vectoring device and means for its control |
-
2014
- 2014-04-29 WO PCT/SE2014/050525 patent/WO2015130204A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546733A1 (en) * | 1991-11-29 | 1993-06-16 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Drive power distribution control system for vehicle |
| DE19807023A1 (en) * | 1997-02-21 | 1998-09-03 | Tochigi Fuji Sangyo Kk | Coupling mechanism with pair of friction couplings for differential drive |
| EP1650072A2 (en) * | 2004-10-21 | 2006-04-26 | Fuji Jukogyo Kabushiki Kaisha | Driving force distribution control apparatus of vehicle |
| JP2008261453A (en) * | 2007-04-13 | 2008-10-30 | Honda Motor Co Ltd | Driving force distribution device for vehicle |
| US20100203999A1 (en) * | 2007-09-10 | 2010-08-12 | Toyota Jidosha Kabushiki Kaisha | Driving force distribution mechanism |
| US20110087409A1 (en) * | 2008-04-24 | 2011-04-14 | Lars Severinsson | Torque vectoring device and means for its control |
| DE102008039926A1 (en) * | 2008-08-27 | 2010-03-04 | Magna Powertrain Ag & Co Kg | Differential gear unit has active controller for torque distribution, which has input element driven by rotary motion, and differential gear is coupled to input element, where two output shafts are coupled with differential gear |
| US20100240485A1 (en) * | 2009-02-20 | 2010-09-23 | Audi Ag | Axle Drive Device for an Axle of a Motor Vehicle, as well as Motor Vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825748A (en) * | 2018-08-23 | 2018-11-16 | 曹洪 | A kind of volitional check differential when increases the differential mechanism of torque |
| CN108825748B (en) * | 2018-08-23 | 2023-12-08 | 曹洪 | Differential mechanism capable of automatically limiting differential speed ratio and increasing torque |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10094457B2 (en) | Electric all-wheel drive two speed with split double reduction planetary | |
| US9453564B1 (en) | Electric all-wheel drive with two-speed double reduction planetary | |
| US8951159B2 (en) | Differential case having lock pins in-line with clutch ear guides | |
| US8827859B2 (en) | Differential having two-piece case split through planetary carrier wall | |
| US7951035B2 (en) | Continuously variable torque vectoring axle assembly | |
| US9709150B2 (en) | Differential having piston housing integrated with differential case | |
| US8808132B2 (en) | Differential with integrated torque vectoring | |
| US10415679B2 (en) | Electric all-wheel drive two speed with split double reduction planetary | |
| US9400034B1 (en) | Electric drive system | |
| GB2525718A (en) | Disconnecting driveline component | |
| CN106476605B (en) | Electric all-wheel drive | |
| US20160138695A1 (en) | Disconnecting awd driveline with torque-vectoring capabilities | |
| US10323693B2 (en) | Disconnect system for an axle | |
| US8771129B2 (en) | Two-mode passive limited slip differential | |
| JP2006207805A (en) | Transmission device unit for variable torque distribution | |
| US9283843B2 (en) | Tandem drive axle system with simplified rear axle | |
| US10197144B2 (en) | Drive unit with torque vectoring and an axle disconnect and reconnect mechanism | |
| CN106931133B (en) | Differential mechanism assembly and vehicle with same | |
| US7083541B2 (en) | Axle drive block with a differential lock | |
| CN102821994B (en) | Forklift | |
| US8449430B2 (en) | Transversely mounted transaxle having a low range gear assembly and powertrain for a vehicle including same | |
| US2796942A (en) | Four wheel drive for automotive vehicles | |
| WO2015130204A1 (en) | A torque vectoring device | |
| US20190226567A1 (en) | Torque vectoring unit | |
| US9803737B2 (en) | Limited slip inter-axle differential |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14883894 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 14883894 Country of ref document: EP Kind code of ref document: A1 |