CN110566604A - Retarder main circulation system - Google Patents
Retarder main circulation system Download PDFInfo
- Publication number
- CN110566604A CN110566604A CN201910900672.0A CN201910900672A CN110566604A CN 110566604 A CN110566604 A CN 110566604A CN 201910900672 A CN201910900672 A CN 201910900672A CN 110566604 A CN110566604 A CN 110566604A
- Authority
- CN
- China
- Prior art keywords
- retarder
- communicated
- water outlet
- stator
- valve block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 154
- 230000002528 anti-freeze Effects 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000012736 aqueous medium Substances 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 239000002609 medium Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/02—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades or like members braked by the fluid
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D2065/783—Features relating to cooling cooling control or adjustment
Abstract
the invention belongs to a working circulating system of an aqueous medium retarder, and provides a main circulating system of the retarder, aiming at solving the technical problems that the size and the weight of the aqueous medium hydraulic retarder are large, the maintenance cost is high, and the environment is not friendly in the prior art, and the main circulating system of the retarder comprises a retarder water inlet channel communicated with an antifreeze liquid pipeline in an engine, and a retarder water outlet channel communicated with a thermostat; a first outlet of the thermostat is communicated with an antifreeze liquid pipeline in the engine, a second outlet of the thermostat is communicated with a heat dissipation water tank, and an outlet of the heat dissipation water tank is communicated with the antifreeze liquid pipeline in the engine; the retarder water inlet channel is communicated with at least one stator water inlet formed in the retarder stator, and the retarder water outlet channel is communicated with at least one stator water outlet formed in the retarder stator; a flow passage is communicated between the retarder water inlet channel and the retarder water outlet channel; an on-off mechanism is arranged between the water inlet channel of the retarder and the water inlet of the stator.
Description
Technical Field
The invention belongs to an aqueous medium retarder work circulation system, and particularly relates to a retarder main circulation system.
Background
Along with the improvement of the requirement of a user on the running safety performance of a vehicle, the influence of a retarder is continuously increased, and a hydraulic retarder is used as an auxiliary braking device of the vehicle, and at present, mechanical equipment taking oil as a working medium and an energy carrier is commonly used. Traditional oil medium hydraulic retarber comprises working chamber, oil bath shell and heat exchanger assembly etc. and is subject to the performance requirement, peripheral size is all great from the past to the back, interference easily appears when matching narrow frame, and heat exchanger performance is great to retarber uniformity influence, under the oil medium structure, heat exchanger is one of the key parts of retarber, can increase the peripheral size of retarber to a certain extent, increase weight, simultaneously, still there is the maintenance cost height, and the problem not friendly to the environment.
Disclosure of Invention
The invention mainly aims to solve the technical problems that an oil medium hydraulic retarder in the prior art is large in size and weight, high in maintenance cost and unfriendly to the environment, and provides a retarder main circulation system.
In order to achieve the purpose, the invention provides the following technical scheme:
A retarder main circulating system is characterized by comprising a retarder water inlet channel communicated with an antifreeze liquid pipeline in an engine and a retarder water outlet channel communicated with a thermostat; a first outlet of the thermostat is communicated with an antifreeze liquid pipeline in the engine, a second outlet of the thermostat is communicated with a heat dissipation water tank, and an outlet of the heat dissipation water tank is communicated with the antifreeze liquid pipeline in the engine; the retarder water inlet channel is communicated with at least one stator water inlet formed in the retarder stator, and the retarder water outlet channel is communicated with at least one stator water outlet formed in the retarder stator; a flow passage is communicated between the retarder water inlet channel and the retarder water outlet channel; an on-off mechanism is arranged between the water inlet channel of the retarder and the water inlet of the stator.
Furthermore, the on-off mechanism comprises a cylinder and a valve block which are fixedly connected and mutually separated; a piston is arranged in the cylinder, a piston rod extending into the valve block is fixed on the lower bottom surface of the piston, a piston cylinder body attached to the inner wall of the valve block is fixedly sleeved on the part of the piston rod located in the valve block, a spring is sleeved on the part of the piston rod located below the piston cylinder body, one end of the spring is connected with the piston cylinder body, and the other end of the spring is fixed in the valve block; an air source is communicated with the upper part of the piston in the cylinder; the upper part of the piston cylinder body of the valve block is provided with a retarder water inlet communicated with a retarder water inlet channel, the lower part of the piston cylinder body is provided with a retarder water outlet, the bottom of the valve block is provided with a valve block water return port, and the stator water outlet, the valve block water return port and the retarder water outlet are communicated with a retarder water outlet channel; the valve block is also provided with a valve block water outlet and a runner water outlet; the water outlet of the valve block is communicated with the water inlet of the stator, and the water outlet of the flow passage is communicated with the lower part of the piston cylinder body in the valve block.
Furthermore, the air source is a vehicle-mounted air source, a control valve is arranged between the upper portion of the piston and the vehicle-mounted air source in the cylinder, the control valve is connected with a controller, and an exhaust hole is formed in the control valve. The vehicle-mounted air source is directly utilized, and the internal layout of the vehicle is facilitated.
Furthermore, a valve is arranged between the retarder water outlet and the stator water outlet.
Furthermore, the valve is a one-way valve from the stator water outlet to the retarder water outlet, the one-way valve can avoid backflow of the anti-freezing solution, and air pressure change in the working process of the retarder is utilized to automatically match opening and closing of the one-way valve.
Further, the on-off mechanism is an electromagnetic valve.
The on-off mechanism is mainly used for controlling on-off between a water inlet channel of the retarder and a stator water inlet formed in a stator of the retarder, can be matched with a corresponding control circuit through an electromagnetic valve to complete on-off matching of the electromagnetic valve, and can also be used for completing on-off control through the piston matching mode of an air source or a vehicle-mounted air source.
Compared with the prior art, the invention has the beneficial effects that:
1. the retarder main circulating system provided by the invention adopts the finished automobile antifreeze as a working medium, provides the hydraulic retarder of an aqueous medium, does not need a heat exchanger and an oil pool shell, is light in weight, low in maintenance cost and environment-friendly, and is easy to realize the design of wide front and narrow back in space. When the retarder works, antifreeze in an engine enters a retarder stator through a retarder water inlet channel, finally enters a working cavity formed between a retarder rotor and the retarder stator, realizes retarding braking along with the rotation of the retarder rotor, flows out of the retarder stator under the action of centrifugal force and then enters a whole vehicle cooling system through a retarder water outlet channel; when the retarder does not work, the antifreeze does not enter the working cavity formed by the retarder stator and the retarder rotor, and the whole vehicle is cooled through the flow channel.
2. The on-off mechanism of the invention realizes the opening and closing of the water outlet of the retarder valve block by the matching of the cylinder and the piston cylinder body in the valve block. When the retarder does not work, the piston cylinder body seals the water outlet of the valve block, the water outlet of the flow channel is staggered, and the antifreeze flows through the flow channel; when the retarder works, the piston is pressed downwards through the air source, the piston cylinder body is driven to press downwards through the piston rod, the piston cylinder body seals the water outlet of the flow channel, the water outlet of the valve block is staggered, the water inlet channel of the retarder is communicated with the water outlet of the valve block, enters the valve block from the water return port of the valve block after passing through the working cavity of the retarder and then flows out of the water outlet of the retarder; when the retarder does not work, the piston cylinder body is reset rapidly under the action of the spring, the piston is driven to reset through the piston rod, the water outlet of the valve block is sealed again, the water outlet of the flow channel is staggered with the piston cylinder body, and switching is completed.
3. The air source of the invention utilizes the vehicle-mounted air source, so that the layout is more compact and reasonable.
4. The on-off mechanism can also be an electromagnetic valve connected with a controller, and provides more choices for the specific design of the automobile.
5. the one-way valve is arranged between the water outlet of the stator and the water outlet of the retarder, and the on-off is automatically realized through the pressure difference between two sides of the one-way valve in the braking working process of the retarder, so that the whole system works more smoothly, and the occurrence of reverse flow is avoided.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a cylinder and a valve block according to a second embodiment of the present invention;
FIG. 3 is a schematic structural view of a non-operating state of the on-off mechanism in the second embodiment of the present invention;
Fig. 4 is a schematic structural diagram of the operating state of the on-off mechanism in the second embodiment of the present invention.
The system comprises an engine 1, a thermostat 2, a retarder 3, a retarder water inlet channel, a retarder 4, a retarder water outlet channel, a retarder 5, a retarder stator 6, a flow channel 7, a retarder 8, an on-off mechanism 801, a cylinder 802, a valve block 803, a piston 804, a piston rod 805, a piston cylinder body 806, a spring 807, a retarder water inlet 807, a retarder water outlet 808, a valve block water outlet 809, a valve block water return port 810, a flow channel water outlet 811, a valve 9, a vehicle-mounted air source 10, a control valve 11, a controller 12, a radiator 13 and a retarder rotor 14.
Detailed Description
the technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
The retarder main circulation system for realizing the auxiliary buffering and braking function by using the whole vehicle antifreeze liquid adopts the whole vehicle antifreeze liquid as a working medium, has the characteristics of high density and high specific heat capacity, and is low in maintenance cost. Compared with the traditional oil medium hydraulic retarder, the oil pool and the heat exchanger do not need to be designed, the weight of the mechanical body is obviously reduced, and the peripheral size is small.
Example one
A retarder main circulating system comprises a retarder water inlet channel 3 communicated with an antifreeze liquid pipeline in an engine 1 and a retarder water outlet channel 4 communicated with a thermostat 2; a first outlet of the thermostat 2 is communicated with an antifreeze liquid pipeline in the engine 1, a second outlet of the thermostat 2 is communicated with a heat radiation water tank 13, and an outlet of the heat radiation water tank 13 is communicated with an antifreeze liquid pipeline in the engine 1; the retarder water inlet channel 3 is communicated with at least one stator water inlet formed on the retarder stator 5, and the retarder water outlet channel 4 is communicated with at least one stator water outlet formed on the retarder stator 5; a flow passage 6 is also communicated between the retarder water inlet channel 3 and the retarder water outlet channel 4; an on-off mechanism 8 is arranged between the retarder water inlet channel 3 and the stator water inlet, and the on-off mechanism 8 is an electromagnetic valve.
When the retarder 7 works, the electromagnetic valve 8 is opened, meanwhile, the flow channel 6 is closed, and the antifreeze in the engine 1 enters a working cavity formed between the retarder stator 5 and the retarder rotor 14 through the retarder water inlet channel 3 and the stator water inlet, and then the retarder braking is realized along with the rotation of the retarder rotor 14. Under the action of centrifugal force, high-speed and high-pressure antifreeze in the working cavity flows out at high speed through a stator water outlet arranged on a retarder stator 5 and flows to the thermostat 2 through a retarder water outlet channel 4, if the temperature of the antifreeze of the whole vehicle is lower than the opening temperature of the thermostat 2, the antifreeze directly enters the engine 1, if the temperature of the antifreeze of the whole vehicle is higher than the opening temperature of the thermostat, the antifreeze enters the engine 1 through the radiating water tank 13, and the operation is repeated.
Example two
As shown in fig. 2, 3 and 4, a retarder primary circulation system comprises a retarder water inlet channel 3 communicated with an antifreeze solution pipeline in an engine 1, and a retarder water outlet channel 4 communicated with a thermostat 2; a first outlet of the thermostat 2 is communicated with an antifreeze liquid pipeline in the engine 1, a second outlet of the thermostat 2 is communicated with a heat radiation water tank 13, and an outlet of the heat radiation water tank 13 is communicated with an antifreeze liquid pipeline in the engine 1; the retarder water inlet channel 3 is communicated with at least one stator water inlet formed on the retarder stator 5, and the retarder water outlet channel 4 is communicated with at least one stator water outlet formed on the retarder stator 5; a flow passage 6 is also communicated between the retarder water inlet channel 3 and the retarder water outlet channel 4; an on-off mechanism 8 is arranged between the retarder water inlet channel 3 and the stator water inlet.
wherein, the on-off mechanism 8 comprises a cylinder 801 and a valve block 802 which are fixedly connected and separated from each other; a piston 803 is arranged in the cylinder 801, a piston rod 804 extending into the valve block 802 is fixed on the lower bottom surface of the piston 803, a piston cylinder 805 attached to the inner wall of the valve block 802 is fixedly sleeved on the part of the piston rod 804 located in the valve block 802, a spring 806 is sleeved on the part of the piston rod 804 located below the piston cylinder 805, one end of the spring 806 is connected with the piston cylinder 805, and the other end of the spring 806 is fixed in the valve block 802; an air source is communicated with the upper part of the piston 803 in the cylinder 801, a retarder water inlet 807 communicated with the retarder water inlet channel 3 is formed in the upper part of the piston cylinder 805 of the valve block 802, and a retarder water outlet 808 is formed in the lower part of the piston cylinder 805; the bottom of the valve block 802 is provided with a valve block water return port 810, and a stator water outlet, the valve block water return port 810 and a retarder water outlet 808 are communicated with a retarder water outlet channel 4; the valve block 802 is also provided with a valve block water outlet 809 and a runner water outlet 811; the valve block water outlet 809 is communicated with the stator water inlet, and the runner water outlet 811 is communicated with the lower part of the piston cylinder 805 in the valve block 802.
In the second embodiment, the air source may be a single air source, or may be a vehicle-mounted air source 10, a control valve 11 is disposed between the air cylinder 801 and the vehicle-mounted air source 10, and the control valve 11 is connected to a controller 12.
In addition, a valve 9 is arranged between the retarder water outlet 808 and the stator water outlet. The valve 9 may be a one-way valve from the stator outlet to the retarder outlet 808.
The working process is as follows: referring to fig. 4, when the retarder 7 works, after the control valve 11 receives a control signal from the controller 12, the control valve 11 is opened, the air pressure of the entire vehicle provided by the vehicle-mounted air source 10 is charged into the cylinder 801, under the pushing action of the air pressure, the piston 803 drives the piston rod 804 and the piston cylinder 805 to move downward together, the spring 806 is compressed, the valve block water outlet 809 is opened, the flow passage water outlet 811 is closed, the antifreeze solution from the entire vehicle of the engine 1 enters the retarder through the retarder water inlet channel 3, under the action of the pressure difference of the entire vehicle waterway system, the antifreeze solution flows into the plurality of stator water inlets provided on the retarder stator 5 through the valve block water outlet 809, finally enters the working cavity formed between the retarder rotor 14 and the retarder stator 5, the retarder braking is realized along with the rotation of the retarder rotor 14, under the centrifugal action, the antifreeze solution with high speed and high pressure in the working cavity flows out at high speed, at the moment, the pressure of the working cavity of the retarder 7 is higher than the pressure of the whole vehicle waterway, the one-way valve at the valve 9 is opened, and the antifreeze flows out of the stator water outlet into the valve block 802, then flows out of the retarder water outlet channel 4 after passing through the retarder water outlet 808, and enters the whole vehicle cooling system. Referring to fig. 3, when the retarder 7 stops working, the controller 12 has no output signal, the channel of the control valve 11 is closed, the internal air is exhausted through the exhaust hole on the control valve 11, the piston 803, the piston rod 804 and the piston cylinder 805 return to the initial state under the restoring force of the spring 806, the valve block water outlet 809 is closed, the runner water outlet 811 is opened, and the fluid remaining in the working chamber formed by the retarder stator 5 and the retarder rotor 14 flows out through the check valve at the valve 9 under the pushing of the residual pressure until the check valve is closed. When the retarder 7 does not work, the controller 12 does not output signals, the control valve 11 does not output air pressure, the air cylinder 801 is at normal pressure, the valve block water outlet 809 is in a closed state, the retarder water inlet channel 3 is communicated with the flow channel 6 connected between the retarder water outlet channel 4, the check valve is closed because of no working pressure in the retarder 7, and after antifreeze solution from the engine 1 enters through the retarder water inlet channel 3, the antifreeze solution directly flows out of the retarder water outlet channel 4 to the thermostat 2 through the flow channel 6. If the temperature of the antifreeze solution of the whole vehicle is lower than the opening temperature of the thermostat 2, the antifreeze solution directly enters the engine 1; if the temperature of the antifreeze solution of the whole vehicle is higher than the opening temperature of the thermostat 2, the antifreeze solution enters the engine after being radiated by the radiating water tank 13, and the process is repeated.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A retarder primary circulation system is characterized in that: the system comprises a retarder water inlet channel (3) communicated with an antifreeze liquid pipeline in an engine (1) and a retarder water outlet channel (4) communicated with a thermostat (2); a first outlet of the thermostat (2) is communicated with an antifreeze liquid pipeline in the engine (1), a second outlet of the thermostat (2) is communicated with a heat radiation water tank (13), and an outlet of the heat radiation water tank (13) is communicated with an antifreeze liquid pipeline in the engine (1); the retarder water inlet channel (3) is communicated with at least one stator water inlet formed on the retarder stator (5), and the retarder water outlet channel (4) is communicated with at least one stator water outlet formed on the retarder stator (5); a flow channel (6) is communicated between the retarder water inlet channel (3) and the retarder water outlet channel (4); an on-off mechanism (8) is arranged between the retarder water inlet channel (3) and the stator water inlet.
2. The retarder primary circulation system of claim 1, wherein: the on-off mechanism (8) comprises a cylinder (801) and a valve block (802) which are fixedly connected and mutually separated;
A piston (803) is arranged in the cylinder (801), a piston rod (804) extending into the valve block (802) is fixed to the lower bottom surface of the piston (803), a piston cylinder body (805) attached to the inner wall of the valve block (802) is fixedly sleeved on the part, located in the valve block (802), of the piston rod (804), a spring (806) is sleeved on the part, located below the piston cylinder body (805), of the piston rod (804), one end of the spring (806) is connected with the piston cylinder body (805), and the other end of the spring is fixed in the valve block (802); an air source is communicated with the upper part of the piston (803) in the cylinder (801);
the upper part of the piston cylinder body (805) of the valve block (802) is provided with a retarder water inlet (807) communicated with the retarder water inlet channel (3), and the lower part of the piston cylinder body (805) is provided with a retarder water outlet (808); the bottom of the valve block (802) is provided with a valve block water return port (810), and a stator water outlet, the valve block water return port (810) and a retarder water outlet (808) are communicated with a retarder water outlet channel (4); the valve block (802) is also provided with a valve block water outlet (809) and a runner water outlet (811); and a valve block water outlet (809) is communicated with the stator water inlet, and a runner water outlet (811) is communicated with the lower part of a piston cylinder body (805) in the valve block (802).
3. A retarder primary circulation system according to claim 2, wherein: the air source is a vehicle-mounted air source (10), a control valve (11) is arranged between the air cylinder (801) and the vehicle-mounted air source (10), the control valve (11) is connected with a controller (12), and an exhaust hole is formed in the control valve (11).
4. A retarder primary circulation system according to claim 2 or 3, wherein: and a valve (9) is arranged between the retarder water outlet (808) and the stator water outlet.
5. The retarder primary circulation system of claim 4, wherein: the valve (9) is a one-way valve from the stator water outlet to the retarder water outlet (808).
6. The retarder primary circulation system of claim 1, wherein: the on-off mechanism (8) is an electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900672.0A CN110566604A (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900672.0A CN110566604A (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566604A true CN110566604A (en) | 2019-12-13 |
Family
ID=68781931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910900672.0A Pending CN110566604A (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566604A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255830A (en) * | 2020-01-20 | 2020-06-09 | 济宁市技师学院 | Birotor correlation hydraulic retarder axle |
| CN112211926A (en) * | 2020-09-28 | 2021-01-12 | 长春中誉集团有限公司 | Aqueous medium hydraulic retarder with automatic heat dissipation system |
| CN114396440A (en) * | 2021-12-23 | 2022-04-26 | 陕西法士特齿轮有限责任公司 | Independent assembly type front retarder system and control method |
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| CN114396440A (en) * | 2021-12-23 | 2022-04-26 | 陕西法士特齿轮有限责任公司 | Independent assembly type front retarder system and control method |
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