CN203439005U - Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder - Google Patents
Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder Download PDFInfo
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- CN203439005U CN203439005U CN201320531832.7U CN201320531832U CN203439005U CN 203439005 U CN203439005 U CN 203439005U CN 201320531832 U CN201320531832 U CN 201320531832U CN 203439005 U CN203439005 U CN 203439005U
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- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 8
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- 230000000694 effects Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
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- 230000009471 action Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 210000004513 dentition Anatomy 0.000 description 1
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- 238000003379 elimination reaction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
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Abstract
The utility model discloses an electromagnetic control formula eliminates hydraulic retarber empty loss energy consumption and improves low-speed performance device, a be used for connecting between derailleur and hydraulic retarber, it includes planetary gear, magnetic formula electromagnetic braking ware and casing, planetary gear includes the planet carrier, sun gear, ring gear and a plurality of planetary gear, the planetary gear equipartition is between sun gear and ring gear, and mesh with sun gear and ring gear respectively, planetary gear still installs on the planet carrier, this planet carrier fixed connection is on the driven gear output shaft of derailleur, sun gear fixed connection is on hydraulic retarber input shaft, magnetic formula electromagnetic braking ware sets up between ring gear and casing, magnetic formula electromagnetic braking ware sets up between ring gear and hydraulic retarber input shaft. The utility model discloses both can eliminate hydraulic retarber air loss energy consumption, can improve its low-speed performance again, simple structure, convenient to use, low cost, reliable operation, superior performance.
Description
Technical field
The utility model relates to a kind of electromagnetic control type and eliminates empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, belongs to vehicle auxiliary braking technical field.
Background technology
At present, when vehicle is braked or frequently brakes in long-time lasting braking, high strength, brake disc temperature can significantly raise, and friction factor decline, degree of wear are increased the weight of, and occurs the even dangerous heat fade phenomenon of total loss of brake efficiency part.Although the application of anti-blocking brake system (ABS), EBD (Electric Brakeforce Distribution) (EBD) etc. has improved stability and the reliability of car brakeing, they are very micro-to the heat fade phenomenon effect of drg.At present, complemental brake system must be installed by the many countries that comprise China clearly passenger vehicle more than regulation certain specification, bogie, and effectively the load of Split flow brake device, improves car brakeing safety performance.Retarder is one of auxiliary brake of vehicle, mainly contains two kinds of hydrodynamic retarder and current vortex retarders.Abroad, hydrodynamic retarder, due to advantages such as lock torque is large, energy consumption is low, good reliabilitys, has replaced current vortex retarder substantially; At home, due to technology and cost, current vortex retarder is still leading product, but greatly develop hydrodynamic retarder, has become inexorable trend.
Hydrodynamic retarder, also referred to as hydrodynamic retarder, its inside is provided with driving wheel and fixed wheel, and driving wheel is connected with hydrodynamic retarder input shaft, and change-speed box outputting power is to hydrodynamic retarder, drive the rotation of hydrodynamic retarder input shaft, during work, in epitrochoidal chamber, be filled with as requested a certain amount of fluid, driving wheel drives fluid to rotate impact fixed wheel, a part of vehicle braking energy is changed into the heat energy of fluid, by cooling heat radiation system, dissipate, realize the object that car brakeing is slow, improve heat resistanceheat resistant decline performance.When the normal vehicle operation of hydrodynamic retarder is housed, while not needing hydrodynamic retarder work, the fluid in epitrochoidal chamber is got back to petrol storage tank, and now epitrochoidal chamber contains air.Because traditional hydrodynamic retarder axis of a movable block is meshed with transmission output shaft and is connected by gear, in Vehicle Driving Cycle process, driving wheel is driven all the time in slew mode by transmission output shaft, air in epitrochoidal chamber forms air circulation under driving wheel effect, produce certain lock torque, thereby cause vehicle energy loss.This degradation of energy is called the empty energy consumption of damaging, and also referred to as pump loss, accounts for greatly 4% of vehicle transmitted power, has reduced the fuel economy of vehicle.Improve empty method of damaging energy consumption and mainly contain two kinds, a kind of is by installing the devices such as valve block additional or inject air in epitrochoidal chamber in epitrochoidal chamber, the air circulation in destruction work chamber, thus reduce the empty energy consumption of damaging; Before the axis of a movable block, add a clutch equipment, when hydrodynamic retarder is not worked, disengaging of clutch, driving wheel stops operating, and reaches and eliminates empty object of damaging energy consumption.(the M that square is directly proportional of the lock torque of hydrodynamic retarder and driving wheel rotating speed
r=λ
mγ n
2d
5).When Vehicle Speed reduces, the lock torque that hydrodynamic retarder can provide can fast-descending.Therefore,, when Vehicle Speed is lower, the auxiliary braking poor-performing of hydrodynamic retarder, can not effectively play the effect of the slow braking of vehicle, generally need to be used in conjunction with other complemental brake systems.Empty damage energy consumption height is poor with low-speed performance is two subject matters that affect hydrodynamic retarder Integrated using performance.But, to so far, also rarely have and mention that both can eliminate hydrodynamic retarder sky damages energy consumption, can improve again the device of its low-speed performance.
Damage energy consumption and improve in low-speed performance device relevant information the existing elimination hydrodynamic retarder that can inquire about is empty, with the maximally related technology of the utility model be that publication number is that the Chinese utility model patent of CN101239616A discloses a kind of hydraulic speed buffer structure that can eliminate pump loss and Granted publication number for the parallel hydraulic retarder of disclose-kind of adjusting gear engagement speed ratio of the Chinese utility model patent of CN202326833U.The former installs a power-transfer clutch additional before the axis of a movable block, realize and eliminate the empty object of damaging energy consumption of hydrodynamic retarder, but it does not have the effect that improves low-speed performance; The latter regulates driving wheel rotating speed by mechanical synchronizer pinion engagement, can improve the low-speed performance of hydrodynamic retarder, but it does not have, eliminates the empty effect of damaging energy consumption, and complex structure, operation inconvenience.
Utility model content
Technical problem to be solved in the utility model is the defect that overcomes prior art, provide a kind of electromagnetic control type to eliminate empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, it both can eliminate the empty energy consumption of damaging of hydrodynamic retarder, can improve its low-speed performance again, simple in structure, easy to use, with low cost, reliable operation, superior performance.
The utility model solves the problems of the technologies described above the technical scheme of taking: a kind of electromagnetic control type is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, be used for being connected between change-speed box and hydrodynamic retarder, it comprises planetary gear train, magnetic-powder-type magnet stopper, magnetic-powder-type magnetic clutch and housing, planetary gear train comprises pinion carrier, sun wheel, gear ring and a plurality of planetary wheel, planetary wheel is distributed between sun wheel and gear ring, and be meshed with sun wheel and gear ring respectively, planetary wheel is also arranged in pinion carrier, this pinion carrier is fixedly connected on the driven gear output shaft of change-speed box, sun wheel is fixedly connected on hydrodynamic retarder input shaft, described magnetic-powder-type magnet stopper is arranged between gear ring and housing so that by joint or the separated stall of ordering about gear ring of magnetic-powder-type magnet stopper, described magnetic-powder-type magnetic clutch be arranged between gear ring and hydrodynamic retarder input shaft in case the joint by magnetic-powder-type magnetic clutch or separated order about gear ring and hydrodynamic retarder input shaft synchronize rotation or relatively rotate.
Further, described magnetic-powder-type magnetic clutch comprises power-transfer clutch magnetic conductive disk, power-transfer clutch magnetic, power-transfer clutch magnetic chamber and power-transfer clutch exciting coil that can external source, power-transfer clutch magnetic conductive disk is solidly set on hydrodynamic retarder input shaft, power-transfer clutch exciting coil is arranged on position corresponding with power-transfer clutch magnetic conductive disk on gear ring, it is indoor that power-transfer clutch magnetic is distributed in power-transfer clutch magnetic, and power-transfer clutch magnetic chamber is between power-transfer clutch exciting coil and power-transfer clutch magnetic conductive disk.
Further, described power-transfer clutch exciting coil is connected with external power supply by electrical assembly, this electrical assembly comprises slip ring, carbon brush and relay, and described power-transfer clutch exciting coil, slip ring, carbon brush and relay is connected with external power supply after being electrically connected mutually successively.
Further, described magnetic-powder-type magnet stopper comprises drg magnetic conductive disk, drg magnetic, drg magnetic chamber and drg exciting coil that can external source, drg magnetic conductive disk is packed on gear ring, drg exciting coil is arranged on position corresponding with drg magnetic conductive disk on housing, it is indoor that drg magnetic is distributed in drg magnetic, and drg magnetic chamber is between drg exciting coil and drg magnetic conductive disk.
Further, described planetary wheel has four.
Adopted after technique scheme, when the speed of a motor vehicle is higher and hydrodynamic retarder is worked, magnetic-powder-type magnetic clutch engages, magnetic-powder-type magnet stopper is separated, sun wheel and gear ring are joined together, planetary gear system do as a whole by the transmission of power of pinion carrier to hydrodynamic retarder input shaft, transmitting ratio is one, hydrodynamic retarder normal operation.Now, vehicle power is passed to driven gear output shaft and pinion carrier by transmission output shaft through driving gear and driven gear, by planetary gear system, passes to hydrodynamic retarder input shaft, drives driving wheel to rotate, and realizes slow brake action.When hydrodynamic retarder is not worked, magnetic-powder-type magnetic clutch and magnetic-powder-type magnet stopper are all in released state, planetary gear system is in idling conditions, the power of pinion carrier can not pass to sun wheel, hydrodynamic retarder driving wheel can effectively not rotate, and the sky that can eliminate hydrodynamic retarder damages energy consumption.When the speed of a motor vehicle is lower and hydrodynamic retarder is worked, magnetic-powder-type magnetic clutch is separated, magnetic-powder-type magnet stopper engages, gear ring is fixed and can not be rotated by device case, now by pinion carrier, drive sun wheel to rotate, the number of teeth of pinion carrier is the sun wheel number of teeth and gear ring number of teeth sum, transmitting ratio is less than one, and driving wheel rotating speed increases, and has improved the low-speed performance of hydrodynamic retarder.The utility model adopts electromagnetic control mode, by controlling the Engage and disengage of magnetic-powder-type magnetic clutch, magnetic-powder-type magnet stopper, regulate power delivery status and the transmitting ratio of single planetary gear system, both can eliminate the empty energy consumption of damaging of hydrodynamic retarder, can improve its low-speed performance again; The utility model is changed less, simple in structure, easy to use, with low cost, reliable operation, superior performance to existing hydrodynamic retarding apparatus.
Accompanying drawing explanation
Fig. 1 is that electromagnetic control type of the present utility model is eliminated the empty structural representation that damages energy consumption and improve low-speed performance device of hydrodynamic retarder;
Fig. 2 is the structural representation of planet dentition of the present utility model;
Fig. 3 is the structural representation of magnetic-powder-type magnetic clutch of the present utility model.
The specific embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below.
As shown in Figure 1, change-speed box has transmission output shaft 2, driving gear 1, driven gear 3 and driven gear output shaft 4, driving gear 1 is sleeved on transmission output shaft 2, and driven gear 3 is sleeved on driven gear output shaft 4, and driving gear 1 is meshed with driven gear 3; Hydrodynamic retarder has driving wheel 12 and fixed wheel 13, and driving wheel 13 is connected with hydrodynamic retarder input shaft 10.
As Fig. 1, shown in 2, a kind of electromagnetic control type is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, be used for being connected between change-speed box and hydrodynamic retarder, it comprises planetary gear train, magnetic-powder-type magnet stopper 9, magnetic-powder-type magnetic clutch 11 and housing, planetary gear train comprises pinion carrier 5, sun wheel 7, gear ring 8 and a plurality of planetary wheel 6, planetary wheel 6 is distributed between sun wheel 7 and gear ring 8, and be meshed with sun wheel 7 and gear ring 8 respectively, planetary wheel 6 is also arranged in pinion carrier 5, this pinion carrier 5 is fixedly connected on the driven gear output shaft 4 of change-speed box, sun wheel 7 is fixedly connected on hydrodynamic retarder input shaft 10, described magnetic-powder-type magnet stopper 9 is arranged between gear ring 8 and housing so that by joint or the separated stall of ordering about gear ring 8 of magnetic-powder-type magnet stopper 9, described magnetic-powder-type magnetic clutch 11 be arranged between gear ring 8 and hydrodynamic retarder input shaft 10 in case the joint by magnetic-powder-type magnetic clutch 11 or separated order about gear ring 8 and hydrodynamic retarder input shaft 10 synchronize rotation or relatively rotate.Planetary wheel 6 has four, but is not limited to this.By controlling the Engage and disengage of magnetic-powder-type magnetic clutch 11, magnetic-powder-type magnet stopper 9, can change power delivery status and the transmitting ratio of planetary gear system; When the speed of a motor vehicle is higher and hydrodynamic retarder is worked, magnetic-powder-type magnetic clutch 11 engages, 9 separation of magnetic-powder-type magnet stopper, sun wheel 7 is joined together with gear ring 8, planetary gear train do as a whole by the transmission of power of pinion carrier 5 to hydrodynamic retarder input shaft 10, transmitting ratio is one, hydrodynamic retarder normal operation.Now, vehicle power is passed to driven gear output shaft 4 and pinion carrier 5 by transmission output shaft 2 through driving gear 1 and driven gear 3, by planetary gear train, passes to hydrodynamic retarder input shaft 10, drives driving wheel 12 to rotate, and realizes slow brake action; When hydrodynamic retarder is not worked, magnetic-powder-type magnetic clutch 11 and magnetic-powder-type magnet stopper 9 are all in released state, planetary gear train is in idling conditions, the power of pinion carrier 5 can not pass to sun wheel 7, the driving wheel 12 of hydrodynamic retarder can effectively not rotate, thereby eliminates the sky damage energy consumption of hydrodynamic retarder; When the speed of a motor vehicle is lower and hydrodynamic retarder is worked, 11 separation of magnetic-powder-type magnetic clutch, magnetic-powder-type magnet stopper 9 engage, gear ring 8 is fixed and can not be rotated by housing, now by pinion carrier 5, drive sun wheel 7 to rotate, the number of teeth of pinion carrier 5 is the number of teeth of sun wheel 7 and the number of teeth sum of gear ring 8, transmitting ratio is less than one, and driving wheel 12 rotating speeds increase, thereby improves the low-speed performance of hydrodynamic retarder.
As shown in Figure 3, magnetic-powder-type magnetic clutch 11 comprises power-transfer clutch magnetic conductive disk 17, power-transfer clutch magnetic 15, power-transfer clutch magnetic chamber 19 and power-transfer clutch exciting coil 14 that can external source, power-transfer clutch magnetic conductive disk 17 is solidly set on hydrodynamic retarder input shaft 10, power-transfer clutch exciting coil 14 is arranged on position corresponding with power-transfer clutch magnetic conductive disk 17 on gear ring 8, power-transfer clutch magnetic 15 is distributed in power-transfer clutch magnetic chamber 19, and power-transfer clutch magnetic chamber 19 is between power-transfer clutch exciting coil 14 and power-transfer clutch magnetic conductive disk 17.Power-transfer clutch exciting coil 14 produces magnetic field around after powering by acquisition.Gear ring 8 can be connected with hydrodynamic retarder input shaft 10 by antifriction-bearing box 18, and both can freely not rotate when power-transfer clutch field winding 14 has electric current to pass through.Power-transfer clutch magnetic 15 is can magnetized 30～50 μ m steel fine-particle powders, when power-transfer clutch field winding 14 does not have electric current to pass through, power-transfer clutch magnetic 15 is not subject to magnetic fields, it is indoor that loosely is distributed in power-transfer clutch magnetic, magnetic-powder-type magnetic clutch 11 is released state, and now gear ring 8 can rotate relatively freely with hydrodynamic retarder input shaft 10; When power-transfer clutch field winding 14 has electric current to pass through, power-transfer clutch magnetic 15 is rapid solidification under magnetic fields, by " loose " state, hold up and be chain, in magnetic field, form " solid magnetic linkage ", magnetic-powder-type magnetic clutch 11 is engagement state, gear ring 8 and hydrodynamic retarder input shaft 10 are connected as one, and magnetic conductive disk 17 is connected with hydrodynamic retarder input shaft 10 by spline, along with hydrodynamic retarder input shaft 10 rotates together.
Power-transfer clutch exciting coil 14 is connected with external power supply by electrical assembly, and this electrical assembly comprises slip ring, carbon brush 16 and relay, and power-transfer clutch exciting coil 14, slip ring, carbon brush 16 and relay are connected with external power supply after being electrically connected mutually successively.
Described magnetic-powder-type magnet stopper 9 comprises drg magnetic conductive disk, drg magnetic, drg magnetic chamber and drg exciting coil that can external source, drg magnetic conductive disk is packed on gear ring 8, drg exciting coil is arranged on position corresponding with drg magnetic conductive disk on housing, it is indoor that drg magnetic is distributed in drg magnetic, and drg magnetic chamber is between drg exciting coil and drg magnetic conductive disk.
The structural principle of magnetic-powder-type magnet stopper 9 is similar to magnetic-powder-type magnetic clutch 11, two parts that just magnetic-powder-type magnet stopper 9 connects are gear ring 8 and housing, when drg field winding is switched on, magnetic-powder-type magnet stopper 9 connects as one gear ring 8 and housing, fixed gear ring 8, stops its rotation; When the power-off of drg field winding, gear ring 8 is not affected by housing, can rotate relatively freely.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. an electromagnetic control type is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, be used for being connected between change-speed box and hydrodynamic retarder, it comprises planetary gear train, magnetic-powder-type magnet stopper (9), magnetic-powder-type magnetic clutch (11) and housing, planetary gear train comprises pinion carrier (5), sun wheel (7), gear ring (8) and a plurality of planetary wheel (6), planetary wheel (6) is distributed between sun wheel (7) and gear ring (8), and be meshed with sun wheel (7) and gear ring (8) respectively, planetary wheel (6) is also arranged in pinion carrier (5), this pinion carrier (5) is fixedly connected on the driven gear output shaft (4) of change-speed box, sun wheel (7) is fixedly connected on hydrodynamic retarder input shaft (10), described magnetic-powder-type magnet stopper (9) is arranged between gear ring (8) and housing so that by joint or the separated stall of ordering about gear ring (8) of magnetic-powder-type magnet stopper (9), described magnetic-powder-type magnetic clutch (11) be arranged between gear ring (8) and hydrodynamic retarder input shaft (10) in case the joint by magnetic-powder-type magnetic clutch (11) or separation order about gear ring (8) and hydrodynamic retarder input shaft (10) synchronize rotation or relatively rotate.
2. electromagnetic control type according to claim 1 is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, it is characterized in that: magnetic-powder-type magnetic clutch (11) comprises power-transfer clutch magnetic conductive disk (17), power-transfer clutch magnetic (15), power-transfer clutch magnetic chamber (19) and power-transfer clutch exciting coil (14) that can external source, power-transfer clutch magnetic conductive disk (17) is solidly set on hydrodynamic retarder input shaft (10), power-transfer clutch exciting coil (14) is arranged on the upper position corresponding with power-transfer clutch magnetic conductive disk (17) of gear ring (8), power-transfer clutch magnetic (15) is distributed in power-transfer clutch magnetic chamber (19), and power-transfer clutch magnetic chamber (19) is positioned between power-transfer clutch exciting coil (14) and power-transfer clutch magnetic conductive disk (17).
3. electromagnetic control type according to claim 2 is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, it is characterized in that: described power-transfer clutch exciting coil (14) is connected with external power supply by electrical assembly, this electrical assembly comprises slip ring, carbon brush (16) and relay, and power-transfer clutch exciting coil (14), slip ring, carbon brush (16) and relay are connected with external power supply after being electrically connected mutually successively.
4. according to the electromagnetic control type described in claim 1 or 2 or 3, eliminate empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, it is characterized in that: described magnetic-powder-type magnet stopper (9) comprises drg magnetic conductive disk, drg magnetic, drg magnetic chamber and drg exciting coil that can external source, drg magnetic conductive disk is packed on gear ring (8), drg exciting coil is arranged on position corresponding with drg magnetic conductive disk on housing, it is indoor that drg magnetic is distributed in drg magnetic, and drg magnetic chamber is between drg exciting coil and drg magnetic conductive disk.
5. electromagnetic control type according to claim 1 is eliminated empty energy consumption and the raising low-speed performance device of damaging of hydrodynamic retarder, it is characterized in that: described planetary wheel (6) has four.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320531832.7U CN203439005U (en) | 2013-08-28 | 2013-08-28 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320531832.7U CN203439005U (en) | 2013-08-28 | 2013-08-28 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
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| CN203439005U true CN203439005U (en) | 2014-02-19 |
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| CN201320531832.7U Expired - Lifetime CN203439005U (en) | 2013-08-28 | 2013-08-28 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407436A (en) * | 2013-08-28 | 2013-11-27 | 江苏理工学院 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
| CN104235235A (en) * | 2014-09-16 | 2014-12-24 | 江苏理工学院 | Wheel-side integrated hydraulic retarding and friction braking device for vehicle |
-
2013
- 2013-08-28 CN CN201320531832.7U patent/CN203439005U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407436A (en) * | 2013-08-28 | 2013-11-27 | 江苏理工学院 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
| CN103407436B (en) * | 2013-08-28 | 2016-07-06 | 江苏理工学院 | Electromagnetic control type device for eliminating air loss energy consumption and improving low-speed performance of hydrodynamic retarder |
| CN104235235A (en) * | 2014-09-16 | 2014-12-24 | 江苏理工学院 | Wheel-side integrated hydraulic retarding and friction braking device for vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20140219 Effective date of abandoning: 20160706 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140219 Effective date of abandoning: 20160706 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |