CN110566604B - Retarder main circulation system - Google Patents
Retarder main circulation system Download PDFInfo
- Publication number
- CN110566604B CN110566604B CN201910900672.0A CN201910900672A CN110566604B CN 110566604 B CN110566604 B CN 110566604B CN 201910900672 A CN201910900672 A CN 201910900672A CN 110566604 B CN110566604 B CN 110566604B
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- Prior art keywords
- retarder
- communicated
- water outlet
- stator
- valve block
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 156
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000002609 medium Substances 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000012736 aqueous medium Substances 0.000 abstract description 3
- 230000002528 anti-freeze Effects 0.000 description 16
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 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
- 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
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The invention belongs to an aqueous medium retarder working circulation system, and aims to solve the technical problems of large size and weight, high maintenance cost and unfriendly environment of an oil medium hydraulic retarder in the prior art, and provides a retarder main circulation system which comprises a retarder water inlet channel communicated with an antifreezing solution pipeline in an engine and a retarder water outlet channel communicated with a thermostat; the first outlet of the thermostat is communicated with an antifreezing fluid pipeline in the engine, the second outlet of the thermostat is communicated with a radiating water tank, and the outlet of the radiating water tank is communicated with the antifreezing fluid 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 also communicated between the retarder water inlet passage and the retarder water outlet passage; an on-off mechanism is arranged between the retarder water inlet channel and the stator water inlet.
Description
Technical Field
The invention belongs to an aqueous medium retarder working circulation system, and particularly relates to a retarder main circulation system.
Background
With the improvement of the requirements of users on the running safety performance of vehicles, the influence of the retarder is continuously increased, and the hydraulic retarder is used as an auxiliary braking device of the vehicles and is currently more commonly used as mechanical equipment which takes oil liquid as a working medium and an energy carrier. The traditional oil medium hydraulic retarder consists of a working cavity, an oil tank shell, a heat exchanger assembly and the like, is limited by performance requirements, has larger peripheral size from front to back, is easy to interfere when being matched with a narrow frame, has larger influence on the uniformity of the retarder due to the performance of the heat exchanger, and can increase the peripheral size of the retarder to a certain extent, increase the weight and simultaneously has the problems of high maintenance cost and unfriendly environment due to the fact that the heat exchanger is used as one of key parts of the retarder under an oil medium structure.
Disclosure of Invention
The invention mainly aims to solve the technical problems of large size and weight, high maintenance cost and unfriendly environment of an oil medium hydraulic retarder in the prior art and provides a retarder main circulation system.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The retarder main circulation system is characterized by comprising a retarder water inlet channel communicated with an antifreezing solution pipeline in an engine and a retarder water outlet channel communicated with a thermostat; the first outlet of the thermostat is communicated with an antifreezing fluid pipeline in the engine, the second outlet of the thermostat is communicated with a radiating water tank, and the outlet of the radiating water tank is communicated with the antifreezing fluid 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 also communicated between the retarder water inlet passage and the retarder water outlet passage; an on-off mechanism is arranged between the retarder water inlet channel and the stator water inlet.
Further, the on-off mechanism comprises an air cylinder and a valve block which are fixedly connected and mutually separated; the 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 sleeved and fixed on the part of the piston rod positioned in the valve block, a spring is sleeved and arranged on the part of the piston rod positioned 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 valve block is positioned at the upper part of the piston cylinder body and 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 valve block water outlet is communicated with the stator water inlet, and the runner water outlet is communicated with the lower part of the piston cylinder body in the valve block.
Further, the air source is a vehicle-mounted air source, a control valve is arranged between the upper part of the piston in the air cylinder and the vehicle-mounted air source, 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, so that the internal layout of the vehicle is facilitated.
Further, a valve is arranged between the retarder water outlet and the stator water outlet.
Further, 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 antifreeze fluid, and the air pressure change in the working process of the retarder is utilized to automatically match with 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 the on-off of the water inlet channel of the retarder and the water inlet of the stator arranged on the retarder stator, can be matched with a corresponding control circuit by adopting an electromagnetic valve to complete the on-off matching of the electromagnetic valve, and can also be matched with the piston by utilizing an air source or a vehicle-mounted air source to complete the on-off control.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the retarder main circulation system, the whole vehicle antifreeze is used as a working medium, and the hydraulic retarder of the aqueous medium is provided, so that a heat exchanger and an oil pool shell are not needed any more, the retarder main circulation system is light in weight, low in maintenance cost and environment-friendly, and the design with wide front and narrow rear is easy to realize in space. When the retarder works, antifreeze fluid in the engine enters the retarder stator through a retarder water inlet channel, finally enters a working cavity formed between the retarder rotor and the retarder stator, realizes retarder braking along with rotation of the retarder rotor, flows out of the retarder stator under the action of centrifugal force, and enters a whole vehicle cooling system through a retarder water outlet channel; when the retarder does not work, the antifreeze fluid does not enter the working cavity formed by the stator and the rotor of the retarder, 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 utilizing the matching of the cylinder and the piston cylinder body in the valve block. When the retarder does not work, the piston cylinder seals the water outlet of the valve block, the water outlet of the runner is staggered, and the antifreeze fluid flows through the runner; when the retarder works, the piston is pressed down by the air source, the piston cylinder body is driven to be pressed down by the piston rod, the piston cylinder body seals the water outlet of the runner, 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, and the retarder enters the valve block from the water return port of the valve block after passing through the working cavity of the retarder and flows out from the water outlet of the retarder; when the retarder does not work, under the action of the spring, the piston cylinder body is quickly reset, the piston is driven to reset through the piston rod, the water outlet of the valve block is sealed again, and the water outlet of the flow passage is staggered with the piston cylinder body, so that switching is completed.
3. The air source of the invention utilizes a vehicle-mounted air source, so that the layout is more compact and reasonable.
4. The on-off mechanism of the invention can also be an electromagnetic valve connected with a controller, thereby providing more choices for the specific design of the automobile.
5. According to the invention, the one-way valve is arranged between the stator water outlet and the retarder water outlet, and the on-off is automatically realized through the pressure difference at the 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 countercurrent is avoided.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a cylinder and valve block in a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram 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 an on-off mechanism in a second embodiment of the present invention.
The device comprises a 1-engine, a 2-thermostat, a 3-retarder water inlet channel, a 4-retarder water outlet channel, a 5-retarder stator, a 6-runner, a 7-retarder, an 8-on-off mechanism, an 801-cylinder, an 802-valve block, 803-piston, 804-piston rod, 805-piston cylinder, 806-spring, 807-retarder water inlet, 808-retarder water outlet, 809-valve block water outlet, 810-valve block water return, 811-runner water outlet, 9-valve, 10-vehicle-mounted air source, 11-control valve, 12-controller, 13-radiating water tank and 14-retarder rotor.
Detailed Description
The technical solutions 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 apparent that the described embodiments do not limit the present invention.
The retarder main circulation system for realizing the auxiliary buffering braking function by using the whole vehicle antifreeze fluid adopts the whole vehicle antifreeze fluid as a working medium, and has the characteristics of high density and high specific heat capacity, and low maintenance cost. Compared with the traditional oil medium hydrodynamic retarder, an oil pool and a heat exchanger are not required to be designed, the weight of the mechanical body is obviously reduced, and the peripheral size is small.
Example 1
A retarder main circulation system comprises a retarder water inlet channel 3 communicated with an antifreezing solution pipeline in an engine 1 and a retarder water outlet channel 4 communicated with a thermostat 2; the first outlet of the thermostat 2 is communicated with an antifreezing fluid pipeline in the engine 1, the second outlet of the thermostat 2 is communicated with a radiating water tank 13, and the outlet of the radiating water tank 13 is communicated with the antifreezing fluid pipeline in the engine 1; the retarder water inlet channel 3 is communicated with at least one stator water inlet formed in the retarder stator 5, and the retarder water outlet channel 4 is communicated with at least one stator water outlet formed in the retarder stator 5; a runner 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, the runner 6 is closed at the same time, and the antifreeze fluid 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 the retarder braking is realized along with the rotation of the retarder rotor 14. Under the action of centrifugal force, high-speed high-pressure antifreeze in the working cavity flows out at high speed through a stator water outlet arranged on the retarder stator 5, flows to the thermostat 2 through a retarder water outlet channel 4, directly enters the engine 1 if the temperature of the antifreeze in the whole vehicle is lower than the opening temperature of the thermostat 2, and enters the engine 1 after passing through a radiating water tank 13 if the temperature of the antifreeze in the whole vehicle is higher than the opening temperature of the thermostat, and is repeatedly circulated in this way.
Example two
As shown in fig. 2, 3 and 4, a retarder main circulation system includes a retarder water inlet passage 3 communicating with an antifreeze liquid pipeline in an engine 1, and a retarder water outlet passage 4 communicating with a thermostat 2; the first outlet of the thermostat 2 is communicated with an antifreezing fluid pipeline in the engine 1, the second outlet of the thermostat 2 is communicated with a radiating water tank 13, and the outlet of the radiating water tank 13 is communicated with the antifreezing fluid pipeline in the engine 1; the retarder water inlet channel 3 is communicated with at least one stator water inlet formed in the retarder stator 5, and the retarder water outlet channel 4 is communicated with at least one stator water outlet formed in the retarder stator 5; a runner 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 are mutually separated; 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 body 805 attached to the inner wall of the valve block 802 is sleeved and fixed on the part of the piston rod 804 positioned in the valve block 802, a spring 806 is sleeved and arranged on the part of the piston rod 804 positioned below the piston cylinder body 805, one end of the spring 806 is connected with the piston cylinder body 805, and the other end of the spring 806 is fixed in the valve block 802; an air source is communicated with the cylinder 801 above the piston 803, a retarder water inlet 807 communicated with a retarder water inlet channel 3 is formed in the upper portion of the piston cylinder 805 by the valve block 802, and a retarder water outlet 808 is formed in the lower portion of the piston cylinder 805; the bottom of the valve block 802 is provided with a valve block water return port 810, and the stator water outlet, the valve block water return port 810 and a retarder water outlet 808 are communicated with the retarder water outlet channel 4; the valve block 802 is also provided with a valve block water outlet 809 and a flow channel water outlet 811; the valve block water outlet 809 communicates with the stator water inlet and the flow channel water outlet 811 communicates with the lower portion of the piston cylinder 805 within the valve block 802.
In the second embodiment, the air source may be a single air source or a vehicle-mounted air source 10, and a control valve 11 is disposed between the cylinder 801 and the vehicle-mounted air source 10, and the control valve 11 is connected with a controller 12.
In addition, a valve 9 is arranged between the retarder water outlet 808 and the stator water outlet. Valve 9 may be a one-way valve from the stator outlet to the retarder outlet 808.
The working process is as follows: as shown in fig. 4, when the retarder 7 works, after receiving a control signal of the controller 12, the control valve 11 is opened, the whole air pressure provided by the vehicle-mounted air source 10 is filled into the air cylinder 801, under the pushing action of air pressure, the piston 803 drives the piston rod 804 to move downwards together with the piston cylinder 805, the spring 806 is compressed, the valve block water outlet 809 is opened, the runner water outlet 811 is closed, whole anti-freezing fluid from the engine 1 enters the retarder through the retarder water inlet channel 3, flows into a plurality of stator water inlets arranged on the retarder stator 5 through the valve block water outlet 809 under the pressure difference action of the whole water channel system, finally enters the working cavity formed between the retarder rotor 14 and the retarder stator 5, and realizes retarding braking along with the rotation of the retarder rotor 14, and under the centrifugal action, the high-speed high-pressure anti-freezing fluid in the working cavity flows out at a high speed through a plurality of stator water outlets arranged on the retarder stator 5, and because the working cavity pressure of the retarder 7 is higher than the whole water channel pressure, the one-way valve at the valve 9 is opened, the anti-freezing fluid flows out from the stator water outlet into the valve block 802, flows out through the retarder water outlet 808 and then flows out through the retarder water outlet 808 and enters the cooling system. As shown in fig. 3, when the retarder 7 stops working, the controller 12 has no output signal, the control valve 11 is closed, the internal gas is discharged 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 residual fluid in the working chamber formed by the retarder stator 5 and the retarder rotor 14 flows out through the one-way valve at the valve 9 under the pushing of the residual pressure until the one-way valve is closed. When the retarder 7 does not work, the controller 12 does not have signal output, the control valve 11 does not have output air pressure, the cylinder 801 is at normal pressure, the valve block water outlet 809 is in a closed state, the flow channel 6 connected between the retarder water inlet channel 3 and the retarder water outlet channel 4 is communicated, the one-way valve is closed because the retarder 7 does not have working pressure inside, and antifreeze fluid from the engine 1 directly flows out of the retarder water outlet channel 4 to the thermostat 2 through the flow channel 6 after entering through the retarder water inlet channel 3. If the temperature of the whole vehicle antifreeze fluid is less than the opening temperature of the thermostat 2, the antifreeze fluid directly enters the engine 1; if the temperature of the whole vehicle antifreeze is higher than the opening temperature of the thermostat 2, the coolant enters the engine after being radiated by the radiating water tank 13, and the coolant is repeatedly circulated.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (5)
1. The utility model provides a retarber main cycle system which characterized in that: comprises a retarder water inlet channel (3) communicated with an antifreezing fluid pipeline in the engine (1) and a retarder water outlet channel (4) communicated with the thermostat (2); the first outlet of the thermostat (2) is communicated with an antifreezing fluid pipeline in the engine (1), the second outlet of the thermostat (2) is communicated with a radiating water tank (13), and the outlet of the radiating water tank (13) is communicated with the antifreezing fluid pipeline in the engine (1); the retarder water inlet channel (3) is communicated with at least one stator water inlet formed in the retarder stator (5), and the retarder water outlet channel (4) is communicated with at least one stator water outlet formed in the retarder stator (5); a runner (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;
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 on the lower bottom surface of the piston (803), a piston cylinder body (805) attached to the inner wall of the valve block (802) is sleeved and fixed on the part of the piston rod (804) located in the valve block (802), a spring (806) is sleeved and arranged on the part of the piston rod (804) located below the piston cylinder body (805), one end of the spring (806) is connected with the piston cylinder body (805), and the other end of the spring (806) is fixed in the valve block (802); an air source is communicated with the cylinder (801) and is positioned above the piston (803);
The valve block (802) is positioned at the upper part of the piston cylinder body (805) and 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); a valve block water return port (810) is formed in the bottom of the valve block (802), and the stator water outlet, the valve block water return port (810) and the retarder water outlet (808) are communicated with the 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); 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 (805) in the valve block (802).
2. A retarder main circulation system as claimed in claim 1, characterized in that: 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).
3. A retarder main circulation system according to claim 1 or 2, characterized in that: a valve (9) is arranged between the retarder water outlet (808) and the stator water outlet.
4. A retarder main circulation system as claimed in claim 3, characterized in that: the valve (9) is a one-way valve from the stator water outlet to the retarder water outlet (808).
5. A retarder main circulation system as claimed in claim 1, characterized in that: the on-off mechanism (8) is an electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900672.0A CN110566604B (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900672.0A CN110566604B (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110566604A CN110566604A (en) | 2019-12-13 |
| CN110566604B true CN110566604B (en) | 2024-05-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910900672.0A Active CN110566604B (en) | 2019-09-23 | 2019-09-23 | Retarder main circulation system |
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| CN (1) | CN110566604B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255830B (en) * | 2020-01-20 | 2021-07-20 | 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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