CN113619552A - Braking system and commercial car - Google Patents
Braking system and commercial car Download PDFInfo
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- CN113619552A CN113619552A CN202111060837.1A CN202111060837A CN113619552A CN 113619552 A CN113619552 A CN 113619552A CN 202111060837 A CN202111060837 A CN 202111060837A CN 113619552 A CN113619552 A CN 113619552A
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- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 238000004146 energy storage Methods 0.000 claims description 39
- 238000013461 design Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
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- 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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/36—Other control devices or valves characterised by definite functions
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a brake system and a commercial vehicle. The brake system includes: a medium supply unit; the two opposite ends of the first brake loop are respectively communicated with the medium providing unit, and the first brake loop comprises a first sub brake loop and a second sub brake loop which are arranged in parallel; the service brake cylinder is communicated with the first brake circuit and is in transmission connection with the brake; the proportional valve is communicated with the first sub-braking path and is arranged at the upstream of the automobile brake cylinder; the controller is in communication connection with the proportional valve; the reversing valve is arranged on the second sub-braking path and is in communication connection with the controller; when the proportional valve is closed, the first sub braking path is blocked, and the reversing valve is controlled to be communicated with the second sub braking path, so that the brake medium can bypass the proportional valve and can flow into the service brake cylinder through the reversing valve. The braking system effectively improves the stability of the commercial vehicle through the dual-redundancy design of the braking function.
Description
Technical Field
The invention relates to the technical field of vehicle braking, in particular to a braking system and a commercial vehicle.
Background
With the continuous and healthy development of economy in China, the demand on commercial vehicles is higher and higher in a closed park represented by a port, and the commercial vehicles with unmanned technology are favored more and more.
The current commercial vehicle technology with unmanned technology reaches unprecedented height, but the practical application is not mature enough. For example, when facing a complex use environment such as a port, the brake system of the existing commercial vehicle is not stable enough, and the problem of brake system failure occurs, thereby causing serious consequences.
Disclosure of Invention
Therefore, the brake system with stable service performance and the commercial vehicle are needed to be provided aiming at the problem that the brake system of the conventional commercial vehicle is not stable enough and fails.
According to one aspect of the present application, there is provided a brake system for controlling operation of a brake, characterized in that the brake system comprises:
a medium supply unit for supplying a brake medium;
the first brake circuit comprises a first sub brake circuit and a second sub brake circuit which are arranged in parallel, and one ends of the first sub brake circuit and the second sub brake circuit are communicated with the medium providing unit;
the other ends of the first sub-braking circuit and the second sub-braking circuit are communicated with the medium providing unit through the service braking cylinder, and the service braking cylinder is used for being in transmission connection with the brake;
the proportional valve is arranged on the first sub braking path;
the reversing valve is arranged on the second sub braking path; and
the controller is in communication connection with the proportional valve and the reversing valve;
when the proportional valve blocks the first sub braking circuit, the reversing valve is controlled to conduct the second sub braking circuit;
when the proportional valve is controlled to conduct the first sub braking circuit, the reversing valve is controlled to block the second sub braking circuit.
In one embodiment, the brake system further comprises a shuttle valve having one end connected to the first and second sub-brake circuits through a proportional valve directional control valve and the other end connected to the service brake cylinder, the shuttle valve selectively allowing the brake medium to pass through the proportional valve or the directional control valve into the service brake cylinder.
In one embodiment, the brake system further comprises a first pressure sensor communicatively coupled to the controller, the first pressure sensor being disposed proximate to the service brake cylinder for sensing a first pressure value within the service brake cylinder;
the controller can control the opening proportion of the proportional valve according to the first pressure value.
In one embodiment, the braking system further comprises:
the two ends of the second brake loop are respectively communicated with the medium providing unit and are arranged in parallel with the first brake loop;
the parking brake valve is arranged on the second brake loop and is provided with a medium inlet, a medium outlet and a medium return port, and the medium inlet and the medium return port are respectively connected with two ends of the medium supply unit;
the parking spring cylinder is communicated with the medium outlet and is in transmission connection with the brake;
wherein the controller is configured to control the parking brake valve to switch between a first state and a second state;
when the parking brake valve is in the first state, the medium outlet and the medium return port are cut off, and the medium inlet and the medium outlet are communicated;
when the parking brake valve is in the second state, the medium outlet and the medium return port are communicated, and the medium inlet and the medium outlet are cut off.
In one embodiment, the braking system further comprises:
the energy storage device is arranged in the first brake circuit and is arranged at the upstream of the reversing valve and the proportional valve along the flowing direction of the brake medium in the first brake circuit;
the energy storage device is in communication connection with the controller, and the controller is used for controlling the energy storage device to respond to pressure change of the first brake circuit so as to release or accumulate pressure on the first brake circuit.
In one embodiment, the braking system further comprises:
the second pressure detector is arranged close to the energy storage device, is in communication connection with the controller, and is used for detecting a second pressure value in the energy storage device;
and the energy storage device safety valve is communicated between the energy storage device and the first brake circuit and is in communication connection with the controller, and the controller opens or closes the energy storage device safety valve according to the second pressure value.
In one embodiment, the braking system further comprises:
the second pressure detector is arranged close to the energy storage device, is in communication connection with the controller, and is used for detecting a second pressure value in the energy storage device;
the two opposite ends of the first unloading loop are respectively communicated with the medium providing unit;
and the electromagnetic unloading valve is arranged in the first unloading loop and is in communication connection with the controller, and the controller can open or close the electromagnetic unloading valve according to the second pressure value.
In one embodiment, the braking system further comprises:
the two opposite ends of the second unloading loop are respectively communicated with the medium providing unit and are arranged in parallel with the first unloading loop;
the overflow valve is arranged on the second unloading loop;
and the overflow valve is preset with an overflow pressure value and can be opened when the overflow pressure value is smaller than the second pressure value.
In one embodiment, the braking system further comprises:
the two opposite ends of the third brake loop are respectively communicated with the medium providing unit and are arranged in parallel with the first brake loop;
a manual pump provided to the third brake circuit, the manual pump being operable to circulate the brake medium in the first brake circuit.
According to another aspect of the application, a commercial vehicle is also provided, comprising the brake system described above.
In the brake system, the proportional valve is used for general braking, and the reversing valve is used for emergency braking. Specifically, when the proportional valve blocks the first sub-braking path, the reversing valve is controlled to conduct the second sub-braking path, so that the brake medium can bypass the proportional valve and can flow into the service brake cylinder through the reversing valve; when the proportional valve is controlled to conduct the first sub-braking path, the reversing valve is controlled to block the second sub-braking path, so that the brake medium can flow into the service brake cylinder through the proportional valve. The braking stability of the braking system is effectively improved by the dual-redundancy design of the braking function.
Drawings
Fig. 1 is a schematic structural diagram of a brake system according to an embodiment of the present application.
100. A braking system; 11. a medium supply unit; 12. a first brake circuit; 121. a first sub-braking path; 122. a second sub-braking path; 13. a service brake cylinder; 14. a proportional valve; 15. a diverter valve; 16. a shuttle valve; 17. a first pressure detector; 18. a one-way valve; 21. a second brake circuit; 22. a parking brake valve; 23. a parking spring cylinder; 31. an energy storage device; 32. an energy storage safety valve; 41. a second pressure detector; 42. a first unloading loop; 43. an electromagnetic unloading valve; 44. a second unloading loop; 45. an overflow valve; 51. a third brake circuit; 52. a manual pump.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The brake system and the commercial vehicle of the present application will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a brake system according to an embodiment of the present application. For the purpose of illustration, only the structures described in connection with the present application are illustrated in the drawings.
The brake system 100 disclosed in at least one embodiment of the present application includes a medium supply unit 11, a first brake circuit 12, a service brake cylinder 13, a proportional valve 14, and a controller. The brake may be a caliper disc brake, which is used for braking and parking a commercial vehicle.
The medium providing unit 11 is used for providing a brake medium, and in some embodiments, the brake medium may be a hydraulic brake medium or a pneumatic brake medium. The first brake circuit 12 medium supply unit 11 includes a first sub brake circuit 121 and a second sub brake circuit 122 arranged in parallel, and one ends of the first sub brake circuit 121 and the second sub brake circuit 122 are communicated with the medium supply unit 11. The other ends of the first sub-braking path 121 and the second sub-braking path 122 are communicated with the medium supply unit 11 through the service brake cylinder 13 and are in transmission connection with the brakes, and the proportional valve 14 is arranged in the first sub-braking path 121. The controller is communicatively connected to the proportional valve 14 to determine whether brake medium is entering the service brake cylinders 13 and the magnitude of brake medium entering the service brake cylinders 13.
In some embodiments, the braking system 100 further includes a reversing valve 15, and the reversing valve 15 is disposed in the second sub-braking path 122 and is communicatively connected to the controller for emergency braking of the commercial vehicle, such as failure of the proportional valve 14 of the commercial vehicle.
In particular, in some embodiments, when proportional valve 14 blocks first sub-braking path 121, directional valve 15 is controlled to conduct second sub-braking path 122 to enable brake medium to bypass proportional valve 14 through directional valve 15 into service brake cylinder 13; it should be noted that the condition that the proportional valve 14 is closed here means that the proportional valve 14 has failed or is not controlled by the controller.
When proportional valve 14 is controlled to open first sub-braking path 121, switching valve 15 is controlled to close second sub-braking path 122 to allow brake medium to pass through proportional valve 14 into service brake cylinder 13. It should be noted that, the condition that the proportional valve 14 is opened here means that the proportional valve 14 can work normally and is still under the control of the controller.
In practical application, when the commercial vehicle is in an emergency, the reversing valve 15 can be opened emergently, so that the brake medium can bypass the proportional valve 14 and enter the service brake cylinder 13 through the reversing valve 15, and emergency braking is realized. When the commercial vehicle is in a normal condition, the reversing valve 15 is closed, and the work of the proportional valve 14 is not influenced. Therefore, the braking system 100 effectively improves the stability of the braking system 100 of the commercial vehicle through the dual-redundancy design of the braking function.
In some embodiments, brake system 100 further includes a shuttle valve 16, one end of shuttle valve 16 communicating first sub-braking path 121 with second sub-braking path 122 via proportional valve 14 and directional valve 15, the other end communicating with service brake cylinder 13, shuttle valve 16 alternatively directing brake medium into service brake cylinder 13 via proportional valve 14 or directional valve 15. In this way, the shuttle valve 16 is set to supply the brake medium into the service brake cylinder 13 as long as either the proportional valve 14 or the directional valve 15 is opened, so as to realize the braking of the commercial vehicle. In addition, the shuttle valve 16 can prevent the operation between the proportional valve 14 and the reversing valve 15 from being independent and not influencing each other.
In some embodiments, the brake system 100 further comprises a first pressure sensor 17 communicatively coupled to the controller, the first pressure sensor 17 being disposed proximate the service brake cylinder 13 for sensing a first pressure value within the service brake cylinder 13, the controller being capable of controlling the opening ratio of the proportional valve 14 based on the first pressure value.
In particular, in some embodiments, the first pressure detector 17 may be a pressure sensor disposed in the service brake cylinder 13 for detecting a first pressure value of the brake medium in the service brake cylinder 13 and transmitting the first pressure value to the controller, and the controller controls the opening ratio of the proportional valve 14 according to the first pressure value to change the force applied to the brake by the service brake cylinder 13.
In practical application, when service braking is needed, the controller controls the opening ratio of the proportional valve 14 to increase, the brake medium in the service brake cylinder 13 increases, the brake pressure of the brake increases, and the wheels are gradually braked; along with the continuous increase of the braking force of the wheels and the tendency of locking of the wheels, the opening proportion of the proportional valve 14 is reduced under the control of the controller, the braking medium entering the service brake cylinder 13 is reduced, and the braking pressure of the brake is reduced to prevent the wheels from slipping; when the service brake needs to be released, the controller controls the proportional valve 14 to be closed, no brake medium exists in the service brake cylinder 13, and the wheels work normally. So, the locking phenomenon can effectively be prevented to the commercial car to appear in the first pressure detector 17 of cooperation, has greatly improved driving safety.
In some embodiments, brake system 100 also includes a second brake circuit 21, a parking brake valve 22, and a parking spring cylinder 23. Both ends of the second brake circuit 21 are respectively communicated with the medium providing unit 11 and are arranged in parallel with the first brake circuit 12. The parking brake valve 22 is provided in the second brake circuit 21, and has a medium inlet port, a medium outlet port, and a medium return port, which are connected to both ends of the medium supply unit 11, respectively. The parking spring cylinder 23 is communicated with the medium outlet and is in transmission connection with the brake.
Further, the controller is adapted to control the parking brake valve 22 to switch between the first state and the second state. Specifically, when the parking brake valve 22 is in the first state, the medium outlet and the medium return port are cut off, the medium inlet and the medium outlet are communicated, the brake medium enters the parking spring cylinder 23, the parking spring cylinder 23 releases the brake, and the parking spring force is overcome to release the parking brake; when the parking brake valve 22 is in the second state, the medium outlet and the medium return outlet are communicated, the medium inlet and the medium outlet are cut off, the brake medium is discharged from the parking spring cylinder 23, the parking spring cylinder 23 pressurizes the brake, the parking spring force is increased, and the parking brake is realized. Thus, rapid braking of the commercial vehicle can be achieved.
In some embodiments, brake system 100 also includes an accumulator device 31, where accumulator device 31 is disposed in first brake circuit 12 and upstream of directional valve 15 and proportional valve 14 in a direction of flow of brake medium in first brake circuit 12. Further, the accumulator device 31 is communicatively coupled to a controller for controlling the accumulator device 31 to release or accumulate pressure to the first brake circuit 12 in response to changes in pressure in the first brake circuit 12.
In practice, the energy storage device 31 can store excess brake medium in the first brake circuit 12 and, when needed, can release the stored brake medium back into the first brake circuit 12. In this way, accumulator device 31 can ensure that the pressure in first brake circuit 12 is normal.
In some embodiments, the braking system 100 further comprises a second pressure detector 41 and an accumulator 31 relief valve, the second pressure detector 41 being disposed proximate to the accumulator 31 and communicatively coupled to the controller for detecting a second pressure value within the accumulator 31. The energy storage device 31 safety valve is communicated between the energy storage device 31 and the first brake circuit 12 and is in communication connection with the controller, and the controller opens or closes the energy storage device 31 safety valve according to the second pressure value.
Specifically, in practical application, when the second pressure value is greater than the maximum bearing pressure of the energy storage device 31, the controller controls the safety valve of the energy storage device 31 to open, and the pressure of the energy storage device 31 is released until the second pressure value is lower than the maximum bearing pressure of the energy storage device 31. In this way, the energy storage device 31 can be protected.
In some embodiments, the brake system 100 further includes a second pressure detector 41, a first unloading circuit 42, and a solenoid unloading valve 43. The second pressure detector 41 is disposed near the energy storage device 31 and is communicatively connected to the controller for detecting a second pressure value in the energy storage device 31. Opposite ends of the first relief circuit 42 communicate with the medium supply unit 11, respectively. The electromagnetic unloading valve 43 is arranged in the first unloading loop 42 and is connected to the controller in a communication mode, and the controller can open or close the electromagnetic unloading valve 43 according to the second pressure value.
Specifically, in practical application, when the second pressure value is greater than the maximum bearing pressure of the energy storage device 31, the controller controls the electromagnetic unloading valve 43 to open, so as to write and release pressure to the energy storage device 31, and part of the power medium returns to the medium supply unit 11 again. In this way, the energy storage device 31 can be protected.
In some embodiments, the braking system 100 further includes a second relief circuit 44 and a relief valve 45. The opposite ends of the second unloading circuit 44 are respectively communicated with the medium supply unit 11, and are arranged in parallel with the first unloading circuit 42, and the relief valve 45 is arranged in the second unloading circuit 44.
Further, the overflow pressure value is preset in the overflow valve 45, and the overflow valve 45 can be opened when the second pressure value is greater than the overflow pressure value.
Specifically, in practical applications, when the electromagnetic unloading valve 43 fails and the second pressure value is greater than the maximum bearing pressure of the energy storage device 31, the relief valve 45 is opened, and the power medium in the energy storage device 31 can return to the medium supply unit 11 through the second unloading circuit 44 and the second relief valve 45. Thus, the unloading dual redundancy design effectively ensures that the pressure of the energy storage device 31 and the whole brake system 100 is normal.
In some embodiments, brake system 100 also includes a third brake circuit 51 and a manual pump 52. The opposite ends of the third brake circuit 51 are respectively communicated with the medium supply unit 11 and are arranged in parallel with the first brake circuit 12. A manual pump 52 is provided in the third brake circuit 51, the manual pump 52 being operable to circulate brake medium in the first brake circuit 12 to actuate the parking spring cylinder 23 in driving connection with the brakes.
In practical application, when the commercial vehicle is in a fault and needs to be dragged away for maintenance, and the power medium in the first brake circuit 12 cannot circulate, the manual pump 52 can drive the power medium to circulate, and then the parking spring cylinder 23 is driven to drive the brake, so that the parking brake is released.
In some embodiments, brake system 100 further includes a check valve 18, and check valve 18 is provided downstream of medium supply unit 11 in the flow direction of the brake medium in first brake circuit 12. In this way, the power medium flowing out of the medium supply unit 11 can be prevented from flowing in the reverse direction and damaging the medium supply unit 11.
As the same concept of the present application, there is also provided a commercial vehicle including the brake system 100 described above, wherein the brake system 100 of the commercial vehicle has high stability in use.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A braking system for controlling operation of a brake, the braking system comprising:
a medium supply unit for supplying a brake medium;
the first brake circuit comprises a first sub brake circuit and a second sub brake circuit which are arranged in parallel, and one ends of the first sub brake circuit and the second sub brake circuit are communicated with the medium providing unit;
the other ends of the first sub-braking circuit and the second sub-braking circuit are communicated with the medium providing unit through the service braking cylinder, and the service braking cylinder is used for being in transmission connection with the brake;
the proportional valve is arranged on the first sub braking path;
the reversing valve is arranged on the second sub braking path; and
the controller is in communication connection with the proportional valve and the reversing valve;
when the proportional valve blocks the first sub braking circuit, the reversing valve is controlled to conduct the second sub braking circuit;
when the proportional valve is controlled to conduct the first sub braking circuit, the reversing valve is controlled to block the second sub braking circuit.
2. A brake system according to claim 1, further comprising a shuttle valve having one end connected to the first and second sub-brake circuits through a proportional valve directional valve and the other end connected to the service brake cylinder, the shuttle valve selectively allowing the brake medium to pass through the proportional valve or the directional valve into the service brake cylinder.
3. A brake system according to claim 1, further comprising a first pressure sensor communicatively connected to the controller, the first pressure sensor being disposed proximate the service brake cylinder for sensing a first pressure value within the service brake cylinder;
the controller can control the opening proportion of the proportional valve according to the first pressure value.
4. A braking system according to any one of claims 1 to 3, further comprising:
the two ends of the second brake loop are respectively communicated with the medium providing unit and are arranged in parallel with the first brake loop;
the parking brake valve is arranged on the second brake loop and is provided with a medium inlet, a medium outlet and a medium return port, and the medium inlet and the medium return port are respectively connected with two ends of the medium supply unit;
the parking spring cylinder is communicated with the medium outlet and is in transmission connection with the brake;
wherein the controller is configured to control the parking brake valve to switch between a first state and a second state;
when the parking brake valve is in the first state, the medium outlet and the medium return port are cut off, and the medium inlet and the medium outlet are communicated;
when the parking brake valve is in the second state, the medium outlet and the medium return port are communicated, and the medium inlet and the medium outlet are cut off.
5. The braking system of claim 1, further comprising:
the energy storage device is arranged in the first brake circuit and is arranged at the upstream of the reversing valve and the proportional valve along the flowing direction of the brake medium in the first brake circuit;
the energy storage device is in communication connection with the controller, and the controller is used for controlling the energy storage device to respond to pressure change of the first brake circuit so as to release or accumulate pressure on the first brake circuit.
6. The braking system of claim 5, further comprising:
the second pressure detector is arranged close to the energy storage device, is in communication connection with the controller, and is used for detecting a second pressure value in the energy storage device;
and the energy storage device safety valve is communicated between the energy storage device and the first brake circuit and is in communication connection with the controller, and the controller opens or closes the energy storage device safety valve according to the second pressure value.
7. The braking system of claim 5, further comprising:
the second pressure detector is arranged close to the energy storage device, is in communication connection with the controller, and is used for detecting a second pressure value in the energy storage device;
the two opposite ends of the first unloading loop are respectively communicated with the medium providing unit;
and the electromagnetic unloading valve is arranged in the first unloading loop and is in communication connection with the controller, and the controller can open or close the electromagnetic unloading valve according to the second pressure value.
8. The braking system of claim 7, further comprising:
the two opposite ends of the second unloading loop are respectively communicated with the medium providing unit and are arranged in parallel with the first unloading loop;
the overflow valve is arranged on the second unloading loop;
and the overflow valve is preset with an overflow pressure value and can be opened when the overflow pressure value is smaller than the second pressure value.
9. The braking system of claim 5, further comprising:
the two opposite ends of the third brake loop are respectively communicated with the medium providing unit and are arranged in parallel with the first brake loop;
a manual pump provided to the third brake circuit, the manual pump being operable to circulate the brake medium in the first brake circuit.
10. A commercial vehicle, characterized in that it comprises a brake system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060837.1A CN113619552A (en) | 2021-09-10 | 2021-09-10 | Braking system and commercial car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060837.1A CN113619552A (en) | 2021-09-10 | 2021-09-10 | Braking system and commercial car |
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| Publication Number | Publication Date |
|---|---|
| CN113619552A true CN113619552A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111060837.1A Pending CN113619552A (en) | 2021-09-10 | 2021-09-10 | Braking system and commercial car |
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| CN (1) | CN113619552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117841934A (en) * | 2023-12-28 | 2024-04-09 | 北京少仕科技有限公司 | Unmanned vehicle hydraulic braking system and working method thereof |
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|---|---|---|---|---|
| CN117841934A (en) * | 2023-12-28 | 2024-04-09 | 北京少仕科技有限公司 | Unmanned vehicle hydraulic braking system and working method thereof |
| CN117841934B (en) * | 2023-12-28 | 2024-06-07 | 北京少仕科技有限公司 | Unmanned vehicle hydraulic braking system and working method thereof |
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Application publication date: 20211109 |