CN111942355A - Braking system - Google Patents
Braking system Download PDFInfo
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- CN111942355A CN111942355A CN202010937005.2A CN202010937005A CN111942355A CN 111942355 A CN111942355 A CN 111942355A CN 202010937005 A CN202010937005 A CN 202010937005A CN 111942355 A CN111942355 A CN 111942355A
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- Prior art keywords
- piston
- cavity
- assembly
- brake
- braking
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- 239000003921 oil Substances 0.000 claims abstract description 92
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 19
- 230000002596 correlated effect Effects 0.000 claims description 5
- 239000010985 leather Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Elements And Transmission Devices (AREA)
- Braking Systems And Boosters (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The invention relates to the technical field of automobile braking, in particular to a braking system which comprises a shell, wherein the shell is provided with a first sliding cavity, and one side of the first sliding cavity is provided with a first opening; the piston device is arranged in the first sliding cavity in a sliding mode and can slide along the first sliding cavity under the driving of a brake pedal, the piston device divides the first sliding cavity into an outer cavity with variable volume and a load cavity, the first opening is arranged in the outer cavity, and hydraulic oil is injected into the load cavity; the braking device comprises a power-assisted assembly and a brake oil cylinder, a brake piston of the brake oil cylinder brakes a vehicle by moving, and the power-assisted assembly can push the brake piston to move; and the first valve assembly enables the load cavity to be selectively communicated with the piston cavity and the oil storage tank of the brake oil cylinder. The invention can generate hysteresis feeling and can ensure emergency braking efficiency under the condition of assistance failure.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a braking system.
Background
The hydraulic brake system is an important component in motor vehicles such as automobiles, and a user brakes through a pedal and other structures.
Electronic brake products are mostly adopted in the existing motor vehicles, so that the feet of a user are prevented from being injured by reaction force generated by pure mechanical contact in a brake structure or the feet feel bad, and a pedal simulator is arranged in the electronic brake products. The existing pedal simulator is generally of a pure spring structure, and a user can generate damping feeling and hysteresis feeling by utilizing the elasticity of a spring.
However, the pure spring structure cannot accurately control the pedal feel curve, the pure spring simulation structure almost has no hysteresis feel, a user very difficultly pushes the brake pedal, the spring simulation structure can greatly reduce the acting force of the driver on the brake device under the boosting failure working condition, the driver can apply pressure to the brake device by overcoming the spring force, and the emergency braking is slow.
Therefore, a braking system is needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a brake system which can generate a hysteresis feeling and can ensure emergency braking efficiency under the condition of assistance failure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a braking system comprising:
the device comprises a shell, a first sliding mechanism and a second sliding mechanism, wherein the shell is provided with a first sliding cavity, and one side of the first sliding cavity is provided with a first opening;
the piston device is arranged in the first sliding cavity in a sliding mode and can slide along the first sliding cavity under the driving of a brake pedal, the piston device divides the first sliding cavity into an outer cavity with variable volume and a load cavity, the first opening is arranged in the outer cavity, and hydraulic oil is injected into the load cavity;
the braking device comprises a power-assisted assembly and a braking oil cylinder, a braking piston of the braking oil cylinder brakes a vehicle by moving, the power-assisted assembly can push the braking piston to move, and the distance for the power-assisted assembly to push the braking piston to move is positively correlated with the distance for the braking pedal to drive the piston device to move;
and the first valve assembly enables the load cavity to be selectively communicated with the piston cavity and the oil storage tank of the brake oil cylinder.
Further, the piston device includes:
one end of the first piston assembly extends out relative to the first opening and is connected with the brake pedal, and the first piston assembly is arranged in the first sliding cavity in a sliding mode;
and the second piston assembly is arranged in the first sliding cavity in a sliding manner, and one end of the second piston assembly, which is deviated from the load cavity, is connected with the first piston assembly.
Further, first piston assembly includes footboard connecting piece, push rod and first piston, the one end of footboard connecting piece with brake pedal connects, and the other end with the push rod is connected, the push rod with first piston is connected, first piston can be in the promotion of push rod is followed first slip chamber slides.
Furthermore, first slip chamber is located first piston assembly with the part between the second piston assembly is the push rod chamber, fill in the push rod chamber and establish hydraulic oil, the push rod chamber pass through second valve assembly selective intercommunication in brake cylinder's piston chamber with the oil storage tank.
Further, the second piston assembly comprises an elastic assembly and a second piston, one end of the elastic assembly is connected with the first piston, the other end of the elastic assembly is connected with the second piston, and the second piston is arranged in the first sliding cavity in a sliding mode.
Further, an elastic abutting part is arranged on one side, away from the first opening, of the first sliding cavity, and the second piston can abut against the elastic abutting part under the pushing of the elastic assembly.
Furthermore, the shell is provided with a first oil duct, a second oil duct, a third oil duct and a fourth oil duct, the first oil duct is communicated with the push rod cavity, the second oil duct is communicated with the load cavity, the third oil duct is respectively communicated with the push rod cavity and the braking device, the fourth oil duct is respectively communicated with the load cavity and the braking device, and the first oil duct, the second oil duct, the third oil duct and the fourth oil duct are all provided with switch valves.
Furthermore, the power-assisted assembly comprises a sensor assembly and a driving piece, the sensor assembly is used for collecting the distance of the brake pedal driving the piston device to move, the driving piece is in transmission connection with the brake piston, and the driving piece can drive the brake piston to move.
Further, the elastic abutting part comprises an elastic abutting part and a second return spring, the elastic abutting part is arranged on one side, away from the first opening, of the first sliding cavity, and the second return spring is sleeved on the elastic abutting part.
Furthermore, a first leather cup and a second leather cup are arranged in the first sliding cavity at intervals in parallel.
The invention has the beneficial effects that:
according to the braking system provided by the invention, the shell is provided with the first sliding cavity, the piston device is arranged in the first sliding cavity in a sliding manner and is connected with the braking pedal, the first sliding cavity is provided with the load cavity, hydraulic oil is injected into the load cavity, when a driver steps on the braking pedal, the braking pedal drives the piston device to move towards one side far away from the first opening along the first sliding cavity and extrudes the hydraulic oil, the boosting assembly can push the braking piston of the braking oil cylinder to move, and the distance for the boosting assembly to push the braking piston to move is positively correlated with the distance for the braking pedal to drive the piston device to move, so that the braking hysteresis feeling is generated; the load cavity is selectively communicated with the piston cavity of the brake oil cylinder and the oil storage tank through the first valve component, and when the power assisting component fails, the first valve component enables the load cavity to be communicated with the piston cavity of the brake oil cylinder, so that hydraulic oil enters the brake oil cylinder to brake a vehicle, emergency braking is guaranteed, and personal safety is protected.
Drawings
FIG. 1 is a cross-sectional view of a braking system of the present invention.
In the figure:
1. a housing; 11. a first leather cup; 12. a second leather cup; 13. a first oil passage; 14. a third oil passage; 15. a fourth oil passage; 2. a piston device; 21. a pedal attachment member; 22. a push rod; 23. a first piston; 231. a first spring seat; 24. a first return spring; 25. a connecting rod; 26. a second piston; 261. a second spring seat; 3. a braking device; 31. a moving part; 32. a connecting member; 33. a collecting part; 34. a drive member; 35. a brake cylinder; 4. an elastic abutting member; 41. an elastic abutting portion; 42. a second return spring; 5. an oil storage tank.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to truly simulate the hysteresis feeling of braking after a brake pedal is stepped and realize emergency braking under the condition of failure of boosting when a braking system is used, the invention provides a braking system as shown in figure 1. The brake system includes: the brake device comprises a shell 1, a piston device 2 and a brake device 3, wherein a first sliding cavity is formed in the length direction of the shell 1, and a first opening is formed in one side of the first sliding cavity; the piston device 2 is arranged in the first sliding cavity in a sliding mode, and the piston device 2 can slide along the first sliding cavity under the driving of the brake pedal; the piston device divides the first sliding cavity into an outer cavity with variable volume and a load cavity, the first opening is arranged in the outer cavity, and hydraulic oil is injected into the load cavity; the braking device 3 comprises a power-assisted assembly and a braking oil cylinder 35, a braking piston of the braking oil cylinder 35 brakes the vehicle by moving, the power-assisted assembly can push the braking piston to move, the distance that the power-assisted assembly pushes the braking piston to move is positively correlated with the distance that a braking pedal drives a piston device to move, a first valve assembly can enable a load cavity to be selectively communicated with a piston cavity and an oil storage tank 5 of the braking oil cylinder, when the power-assisted assembly works normally, the load cavity is communicated with the oil storage tank 5, and when the power-assisted assembly fails, the load cavity is communicated with the braking oil cylinder 35.
When a driver steps on the brake pedal, the brake pedal drives the piston device to move towards one side far away from the first opening along the first sliding cavity and extrude hydraulic oil, the boosting assembly can push the brake piston of the brake oil cylinder 35 to move, and the distance for the boosting assembly to push the brake piston to move is positively correlated with the distance for the brake pedal to drive the piston device 2 to move, so that the hysteresis feeling of braking is generated; the load cavity is selectively communicated with the piston cavity of the brake oil cylinder 35 and the oil storage tank 5 through the first valve assembly, and when the power assisting assembly fails, the first valve assembly enables the load cavity to be communicated with the piston cavity of the brake oil cylinder 35, so that hydraulic oil enters the brake oil cylinder 35 to brake a vehicle, emergency braking is guaranteed, and personal safety is protected.
Further, the piston device 2 comprises a first piston assembly and a second piston assembly, wherein one end of the first piston assembly extends out relative to the first opening to be connected with the brake pedal, and the first piston assembly is arranged in the first sliding cavity in a sliding mode; the second piston assembly is arranged in the first sliding cavity in a sliding mode, and one end, which is far away from the load cavity, of the second piston assembly is connected with the first piston assembly. After the brake pedal is stepped on, the first piston assembly drives the second piston assembly to move, the hysteresis feeling after the brake pedal is stepped on can be further improved by arranging the first piston assembly and the second piston assembly, so that the hysteresis feeling of the brake pedal is more truly simulated, and the driving experience of a driver is improved.
Specifically, the first piston assembly comprises a pedal connecting piece 21, a push rod 22 and a first piston 23, one end of the pedal connecting piece 21 is connected with the brake pedal, the other end of the pedal connecting piece is connected with a first end, extending out relative to the first opening, of the push rod 22, the push rod 22 is connected with the first piston 23, and the first piston 23 can slide along the first sliding cavity under the pushing of the push rod 22. In the embodiment, one end of the push rod 22 connected with the first piston 23 has a ball head structure, and can convert the force from the brake pedal with different angles into axial force to act on the first piston 23; by providing the pedal attachment member 21, it is possible to facilitate the connection of the first piston assembly with the brake pedal.
Further, the part of the first sliding cavity between the first piston assembly and the second piston assembly is a push rod cavity, hydraulic oil is filled in the push rod cavity, the push rod cavity is selectively communicated with the piston cavity of the brake oil cylinder 35 and the oil storage tank 5 through the second valve assembly, when the boosting assembly works normally, the push rod cavity is communicated with the oil storage tank 5, and when the boosting assembly fails, the hydraulic oil in the load cavity enters the brake oil cylinder 35 to push the brake piston to brake the vehicle. Specifically, in order to prevent hydraulic oil from leaking, a first leather cup 11 and a second leather cup 12 are arranged in the first sliding cavity at intervals in parallel, and the first leather cup 11 and the second leather cup 12 are respectively arranged at two ends of the push rod cavity and used for sealing the push rod cavity. By arranging the push rod cavity and filling hydraulic oil in the push rod cavity, on one hand, the speed of force transmission between the first piston assembly and the second piston assembly can be delayed, so that the hysteresis feeling of braking is increased; on the other hand, when the boosting assembly fails, hydraulic oil in the load cavity enters the braking device 3 to boost the braking, and the response speed of the braking is further improved.
Further, the second piston assembly comprises an elastic assembly and a second piston 26, one end of the elastic assembly is connected with the first piston 23, the other end of the elastic assembly is connected with the second piston 26, and the second piston 26 is slidably arranged in the first sliding cavity. The first piston 23 transfers the force to the second piston 26 by squeezing the resilient assembly.
Specifically, the elastic assembly includes a first return spring 24 and a connecting rod 25, in order to prevent the first return spring 24 from bending during force transmission, optionally, the connecting rod 25 is disposed between the first piston 23 and the second piston 26, and one end of the connecting rod 25 is slidably connected with the first spring seat 231 of the first piston 23 and can slide relative to the first piston 23; the other end of the connecting rod 25 is connected to the second spring seat 261 of the second piston 26, and the first return spring 24 is fitted around the connecting rod 25. By providing the first return spring 24, the first piston 23 can be pushed to return after the stepping force of the brake pedal is removed.
Further, the side of the first sliding chamber away from the first opening is provided with an elastic abutment 4, and the second piston 26 can abut against the elastic abutment 4 under the urging of the first return spring 24. The elastic abutting piece 4 generates elastic deformation under the action of the second piston 26, meanwhile, the elastic deformation force is acted on the second piston 26, and is transmitted to the first piston 23 and finally transmitted to the brake pedal, and force feedback is realized.
Specifically, in the present embodiment, the elastic abutment member 4 includes an elastic abutment portion 41 and a second return spring 42, the elastic abutment portion 41 is provided on the side of the first slide chamber away from the first opening, and the material of the elastic abutment portion 41 is rubber. In order to further increase the feedback force, a second return spring 42 is sleeved on the elastic abutting portion 41, one end of the second return spring 42 abuts against the second piston 26, and when the force of the brake pedal is removed, the elastic abutting portion 41 and the second return spring 42 push the second piston 26 to return.
Specifically, the elastic abutting part 4 is conical, a groove matched with the elastic abutting part 4 is formed in the second piston 26, and the second piston 26 extrudes the elastic abutting part 4 through the groove to deform.
Further, a first oil duct 13, a second oil duct, a third oil duct 14 and a fourth oil duct 15 are formed in the shell 1, the first oil duct 13 is communicated with the push rod cavity, the second oil duct is communicated with the load cavity, the third oil duct 14 is respectively communicated with the push rod cavity and the braking device 3, the fourth oil duct 15 is respectively communicated with the load cavity and the braking device 3, and the first oil duct 13, the second oil duct, the third oil duct 14 and the fourth oil duct 15 are respectively provided with a switch valve. Specifically, the oil storage tank 5 supplies oil to the push rod chamber through the first oil passage 13, and supplies oil to the load chamber through the second oil passage. When the power assisting assembly of the braking device 3 can work normally, the switch valve on the first oil duct 13, the switch valve on the third oil duct 14 and the switch valve on the fourth oil duct 15 are all in a closed state, and hydraulic oil in the load cavity enters the oil storage tank 5 through the second oil duct; when the boosting assembly breaks down, the switch valve on the first oil duct 13 and the switch valve on the second oil duct are both closed; the on-off valve on the third oil passage 14 and the on-off valve on the fourth oil passage 15 are opened, so that the hydraulic oil enters the brake cylinder 35 for brake assist.
Further, the helping hand subassembly includes sensor assembly and driving piece 34, and sensor assembly is used for gathering the distance that the brake pedal drove piston device and moves, and driving piece 34 is connected with the brake piston transmission, and driving piece 34 can drive the brake piston and move. After the displacement of the push rod 22 is adopted by the sensor assembly, the controller controls the driving part 34 to act, so as to brake the vehicle, and specifically, the sensor assembly controls the driving part 34 through the controller, which is not described in detail herein for the prior art.
Specifically, the sensor assembly includes removal portion 31 and collection portion 33, offers the second sliding chamber that parallels with first sliding chamber on the casing 1, and removal portion 31 sets up in the second sliding chamber, and is connected with first piston 23 through connecting piece 32, and collection portion 33 passes through the controller electricity with driving piece 34 and is connected, and collection portion 33 sets up in the casing 1 outside for gather the displacement of removal portion 31. The vehicle is braked by acquiring the displacement of the first piston 23, thereby acquiring the braking intention sent by the driver. Of course, in other embodiments, other displacement sensors may be used to acquire the displacement of the first piston 23, and no limitation is made herein.
Further, when the acquisition part 33 acquires the displacement of the moving part 31, the driving part 34 is controlled to drive the brake piston of the brake cylinder 35 to act, so that the vehicle is braked; when a problem occurs in the collecting part 33 or the driving part 34, the switching valves on the third oil passage 14 and the fourth oil passage 15 are both opened, so that hydraulic oil enters the brake oil cylinder 35 under the action of the first piston 23 and the second piston 26, the brake piston of the brake oil cylinder 35 is pushed to work, the vehicle is braked, and the vehicle is braked. In the whole process, the driver only needs to overcome the spring forces of the first return spring 24 and the second return spring 42, and the first return spring 24 and the second return spring 42 are both small return springs, so that the provided force is small, and the efficiency of converting the force of the brake pedal in the boosting failure process into the hydraulic pressure of the brake oil cylinder 35 is ensured.
Compared with the traditional spring simulator, the brake system provides real hydraulic pedal feeling, the hysteresis feeling in the return process of the brake pedal is obviously superior to that of the traditional spring simulator, and the brake efficiency is far higher than that of the spring simulator when the boosting fails.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A braking system, comprising:
the device comprises a shell (1), wherein the shell (1) is provided with a first sliding cavity, and one side of the first sliding cavity is provided with a first opening;
the piston device (2) is arranged in the first sliding cavity in a sliding mode, the piston device (2) can slide along the first sliding cavity under the driving of a brake pedal, the piston device (2) divides the first sliding cavity into an outer cavity with variable volume and a load cavity, a first opening is formed in the outer cavity, and hydraulic oil is injected into the load cavity;
the braking device (3) comprises a power-assisted assembly and a braking oil cylinder (35), a braking piston of the braking oil cylinder (35) moves to brake the vehicle, the power-assisted assembly can push the braking piston to move, and the distance for the power-assisted assembly to push the braking piston to move is positively correlated with the distance for the braking pedal to drive the piston device to move;
a first valve assembly enabling the load chamber to be selectively communicated with the piston chamber of the brake cylinder (35) and the oil reservoir (5).
2. A braking system according to claim 1, characterized in that said piston means (2) comprise:
one end of the first piston assembly extends out relative to the first opening and is connected with the brake pedal, and the first piston assembly is arranged in the first sliding cavity in a sliding mode;
and the second piston assembly is arranged in the first sliding cavity in a sliding manner, and one end of the second piston assembly, which is deviated from the load cavity, is connected with the first piston assembly.
3. A braking system according to claim 2, characterized in that said first piston assembly comprises a pedal link (21), a push rod (22) and a first piston (23), one end of said pedal link (21) being connected to said brake pedal and the other end being connected to said push rod (22), said push rod (22) being connected to said first piston (23), said first piston (23) being able to slide along said first sliding chamber under the push of said push rod (22).
4. A braking system according to claim 3, characterized in that the part of the first sliding chamber between the first piston assembly and the second piston assembly is a rod chamber, which is filled with hydraulic oil and is selectively communicated with the piston chamber of the brake cylinder and the oil reservoir (5) through a second valve assembly.
5. A braking system according to claim 3, characterized in that said second piston assembly comprises an elastic assembly and a second piston (26), said elastic assembly being connected at one end to said first piston (23) and at the other end to said second piston (26), said second piston (26) being slidingly arranged in said first sliding chamber.
6. A braking system according to claim 5, characterized in that the side of said first sliding chamber remote from said first opening is provided with an elastic abutment (4), said second piston (26) being able to abut against said elastic abutment (4) under the thrust of said elastic assembly.
7. The brake system according to claim 4, wherein a first oil passage (13), a second oil passage, a third oil passage (14) and a fourth oil passage (15) are formed in the housing (1), the first oil passage (13) is communicated with the push rod cavity, the second oil passage is communicated with the load cavity, the third oil passage (14) is respectively communicated with the push rod cavity and the brake device (3), the fourth oil passage (15) is respectively communicated with the load cavity and the brake device (3), and the first oil passage (13), the second oil passage, the third oil passage (14) and the fourth oil passage (15) are respectively provided with a switch valve.
8. A braking system according to claim 7, characterised in that the assistance assembly comprises a sensor assembly for sensing the distance the brake pedal moves the piston arrangement (2) and a drive member (34), the drive member (34) being in driving connection with the brake piston and the drive member (34) being capable of driving the brake piston to move.
9. A braking system according to claim 6, characterized in that said elastic abutment member (4) comprises an elastic abutment portion (41) and a second return spring (42), said elastic abutment member (4) being arranged on the side of said first sliding cavity remote from said first opening, said second return spring (42) being fitted over said elastic abutment portion (41).
10. A brake system according to claim 1, wherein the first sliding chamber is provided with a first cup (11) and a second cup (12) spaced apart in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937005.2A CN111942355A (en) | 2020-09-08 | 2020-09-08 | Braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937005.2A CN111942355A (en) | 2020-09-08 | 2020-09-08 | Braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111942355A true CN111942355A (en) | 2020-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010937005.2A Pending CN111942355A (en) | 2020-09-08 | 2020-09-08 | Braking system |
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| CN (1) | CN111942355A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113978432A (en) * | 2021-11-24 | 2022-01-28 | 吉林东光奥威汽车制动***有限公司 | Pedal decoupling structure for automobile braking energy recovery |
| CN114684087A (en) * | 2020-12-31 | 2022-07-01 | 比亚迪股份有限公司 | Brake master cylinder, electro-hydraulic brake system and vehicle |
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| KR20040031849A (en) * | 2002-10-04 | 2004-04-14 | 주식회사 만도 | Master cylinder for Electro_Hydraulic Brake system |
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| US20140144732A1 (en) * | 2011-05-02 | 2014-05-29 | Continental Teves Ag & Co. Ohg | Pedal Travel Simulator, Actuating Unit for a Hydraulic Brake System and Brake System |
| CN204264124U (en) * | 2014-11-20 | 2015-04-15 | 常熟理工学院 | For the pedal sense simulator of automobile line control brake system |
| CN107042816A (en) * | 2015-11-19 | 2017-08-15 | 株式会社万都 | Electric brake system |
| CN109641573A (en) * | 2016-06-20 | 2019-04-16 | 罗伯特·博世有限公司 | Method and apparatus and braking system for running brakes |
| CN212332624U (en) * | 2020-09-08 | 2021-01-12 | 上海拿森汽车电子有限公司 | Braking system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114684087A (en) * | 2020-12-31 | 2022-07-01 | 比亚迪股份有限公司 | Brake master cylinder, electro-hydraulic brake system and vehicle |
| CN113978432A (en) * | 2021-11-24 | 2022-01-28 | 吉林东光奥威汽车制动***有限公司 | Pedal decoupling structure for automobile braking energy recovery |
| CN113978432B (en) * | 2021-11-24 | 2023-11-21 | 吉林东光奥威汽车制动***有限公司 | Pedal decoupling structure for automobile brake |
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