CN115384468A - Braking system and vehicle - Google Patents

Braking system and vehicle Download PDF

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Publication number
CN115384468A
CN115384468A CN202211079594.0A CN202211079594A CN115384468A CN 115384468 A CN115384468 A CN 115384468A CN 202211079594 A CN202211079594 A CN 202211079594A CN 115384468 A CN115384468 A CN 115384468A
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CN
China
Prior art keywords
hydraulic
brake
braking
controller
cylinder body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211079594.0A
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Chinese (zh)
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CN115384468B (en
Inventor
张惠根
于江
马祖国
黄荣立
方磊
笪儒杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Zhejiang Zeekr Intelligent Technology Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Zeekr Intelligent Technology Co Ltd
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Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Zeekr Intelligent Technology Co Ltd filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN202211079594.0A priority Critical patent/CN115384468B/en
Publication of CN115384468A publication Critical patent/CN115384468A/en
Application granted granted Critical
Publication of CN115384468B publication Critical patent/CN115384468B/en
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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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/141—Systems with distributor valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • 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

Abstract

The invention discloses a braking system and a vehicle, wherein the vehicle comprises the braking system, the braking system comprises a pedal simulator, a hydraulic braking assembly, an electronic braking assembly and a controller, the controller is respectively electrically connected with the pedal simulator, the hydraulic braking assembly and the electronic braking assembly, the pedal simulator comprises a single-cavity cylinder body, a piston, a liquid storage tank and a push rod, brake fluid is stored in the single-cavity cylinder body, the piston is movably arranged in the single-cavity cylinder body, the liquid storage tank is connected with the single-cavity cylinder body, at least part of the push rod extends into the single-cavity cylinder body to be connected with the piston, the push rod is configured to push the piston to move, so that the brake fluid flows to the liquid storage tank to generate a braking stroke, and the controller is used for respectively controlling the hydraulic braking assembly and the electronic braking assembly to generate braking according to the braking stroke. Therefore, hydraulic pipelines are reduced, the arrangement of the whole vehicle framework is facilitated, and when any one braking mode fails, the other braking mode can work normally, so that the vehicle is braked, and the driving safety of the vehicle is effectively improved.

Description

Braking system and vehicle
Technical Field
The invention relates to the technical field of automobile braking, in particular to a braking system and a vehicle.
Background
Modern automobile electronization degree is higher and higher, and the development of new energy automobiles further accelerates the trend. At present, a brake-by-wire system is increasingly applied to vehicles as a novel efficient brake system.
The brake-by-wire system is classified into an electro-hydraulic brake (EHB) and an electro-mechanical brake (EMB). The EHB uses hydraulic pressure as a braking energy source, the hydraulic pressure generation and the electric control are relatively difficult, the EHB is not easy to integrate with other electric control systems, and the overall arrangement of the vehicle is affected by the arrangement of a large number of braking pipelines. Compared with an EHB (electric hydraulic brake block), the EMB has the advantages that hydraulic pipelines can be greatly reduced, the structure of a brake system can be greatly simplified, and the arrangement, assembly and maintenance are convenient.
Disclosure of Invention
The invention provides a braking system and a vehicle.
The embodiment of the invention provides a brake system, which comprises a pedal simulator, a hydraulic brake assembly, an electronic brake assembly and a controller, wherein the controller is respectively electrically connected with the pedal simulator, the hydraulic brake assembly and the electronic brake assembly, and the pedal simulator comprises:
the brake fluid pump comprises a single-cavity cylinder body, a brake fluid pump body and a brake fluid pump body, wherein the brake fluid pump body is internally provided with a brake fluid pump;
the piston is movably arranged in the single-cavity cylinder body;
the liquid storage tank is connected with the single-cavity cylinder body;
the push rod at least partially extends into the single-cavity cylinder body to be connected with the piston, and the push rod is configured to push the piston to move so that the brake fluid flows to the liquid storage tank to generate a braking stroke;
the controller is used for respectively controlling the hydraulic brake assembly and the electronic brake assembly to generate braking according to the braking stroke.
So, braking system provides the footboard through the footboard simulator and feels for the driver, by controller control hydraulic braking subassembly and electronic braking subassembly, realizes carrying out the vehicle braking simultaneously to the quick braking and the accurate braking of every wheel of vehicle, adopts two kinds of braking modes of hydraulic braking and electronic braking, on the one hand, has reduced the hydraulic pressure pipeline, the whole car framework of being convenient for arrange. On the other hand, when any one braking mode fails, the other braking mode can work normally, so that the vehicle is braked, and the driving safety of the vehicle is effectively improved.
In some embodiments, the pedal simulator comprises:
first elasticity resets, first elasticity resets and is located single chamber cylinder body, and respectively with single chamber cylinder body with the piston butt.
In some embodiments, the push rod includes an abutting portion and a connecting portion extending from the abutting portion to the piston, the connecting portion being movably connected to the piston, and the pedal simulator further includes:
the second elasticity resets and locates the second elasticity resets, the second elasticity resets the cover on the connecting portion, and respectively with the single chamber cylinder body with butt portion butt.
In some embodiments, the pedal simulator further comprises:
the single-cavity cylinder body is connected with the liquid storage tank through the second hydraulic pipeline;
and the second control valve is arranged on the second hydraulic pipeline.
In some embodiments, the hydraulic brake assembly includes a first driver, a hydraulic pump, a third hydraulic line and a hydraulic brake, the first driver is connected to the controller and the hydraulic pump, respectively, and the hydraulic pump is further connected to the hydraulic brake through the third hydraulic line;
the first driver is configured to drive the hydraulic pump to supply brake fluid to the hydraulic brake through the third hydraulic line according to a brake control signal of the controller to brake the hydraulic brake.
In some embodiments, the pedal simulator further comprises:
the first hydraulic pipeline is respectively connected with the single-cavity cylinder body and the hydraulic brake assembly;
and the first control valve is arranged on the first hydraulic pipeline, is closed under the condition that the hydraulic brake assembly and the controller are normal, and is communicated under the condition that the first driving piece and/or the controller are abnormal.
In some embodiments, the hydraulic brake includes a plurality of hydraulic brakes, the third hydraulic line includes a main hydraulic path and a plurality of hydraulic branch paths connected to the main hydraulic path, each of the hydraulic branch paths is connected to one of the hydraulic brakes, and the main hydraulic path is further connected to the hydraulic pump.
In some embodiments, the hydraulic brake assembly further comprises a hydraulic circuit including a main circuit and a plurality of branch circuits connected to the main circuit, each branch circuit being connected to one of the hydraulic brakes, the main circuit being further connected to the reservoir.
In some embodiments, the hydraulic brake assembly further comprises:
the third control valve is arranged in the hydraulic main circuit;
the plurality of fourth control valves are respectively arranged on the plurality of hydraulic branch circuits;
and the fifth control valves are respectively arranged on the branch circuits.
In some embodiments, the hydraulic brake assembly further comprises:
each one-way circulation pipeline corresponds to one hydraulic branch, one end of each one-way circulation pipeline is connected with the hydraulic brake, and the other end of each one-way circulation pipeline is connected with the hydraulic main road.
In some embodiments, the electric brake assembly includes a second drive member and an electric brake, the second drive member being configured to actuate the electric brake to brake in accordance with the brake control signal of the controller.
In some embodiments, the second driver and the electronic brake each include a plurality, and each of the second drivers corresponds to one of the electronic brakes.
The vehicle according to the embodiment of the invention includes the above-described brake system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a brake system according to an embodiment of the present invention;
fig. 2 is a schematic configuration diagram of a vehicle according to an embodiment of the present invention.
Description of the main element symbols:
the vehicle 1000, the brake system 100, the pedal simulator 10, the single-chamber cylinder 11, the piston 12, the reservoir 13, the push rod 14, the abutment 141, the connecting portion 142, the first hydraulic line 15, the first control valve 151, the first elastic restoring member 16, the second elastic restoring member 17, the second hydraulic line 18, the second control valve 181, the hydraulic brake assembly 20, the first driving member 21, the hydraulic pump 22, the hydraulic brake 23, the third hydraulic line 24, the hydraulic main line 241, the third control valve 2411, the hydraulic branch 242, the fourth control valve 2421, the hydraulic circuit 25, the main circuit 251, the branch circuit 252, the fifth control valve 2521, the one-way flow line 26, the one-way valve 261, the electronic brake assembly 30, the second driving member 31, the electronic brake 32, and the controller 40.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill 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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1-2 together, the present invention provides a brake system 100 and a vehicle 1000, the vehicle 1000 includes the brake system 100, the brake system 100 includes a pedal simulator 10, a hydraulic brake assembly 20, an electronic brake assembly 30 and a controller 40, the controller 40 is electrically connected to the pedal simulator 10, the hydraulic brake assembly 20 and the electronic brake assembly 30 respectively, the pedal simulator 10 includes a single-chamber cylinder 11, a piston 12, a liquid storage tank 13 and a push rod 14, brake fluid is stored in the single-chamber cylinder 11, the piston 12 is movably disposed in the single-chamber cylinder 11, the liquid storage tank 13 is connected to the single-chamber cylinder 11, the push rod 14 at least partially extends into the single-chamber cylinder 11 to be connected to the piston 12, the push rod 14 is configured to push the piston 12 to move, so that the brake fluid flows to the liquid storage tank 13 to generate a braking stroke, and the controller 40 is configured to control the hydraulic brake assembly 20 and the electronic brake assembly 30 to generate braking according to the braking stroke, respectively.
Specifically, the braking system 100 is used for braking the vehicle 1000 to decelerate or stop the vehicle 1000. The brake system 100 is mainly composed of a pedal simulator 10, a hydraulic brake assembly 20, an electric brake assembly 30 and a controller 40, wherein the pedal simulator 10 is connected with a brake pedal on the vehicle 1000, and the pedal simulator 10 is used for providing a pedal feeling to a driver.
The pedal simulator 10 is composed of a single-cavity cylinder 11, a piston 12, a liquid storage tank 13 and a push rod 14, wherein the single-cavity cylinder 11 is a cylinder only comprising one cavity, and brake fluid is stored in the single-cavity cylinder 11. Brake pedal is connected with push rod 14, and when the driver stepped on brake pedal, brake pedal drove push rod 14, and push rod 14 promotes piston 12 and moves to single chamber cylinder 11, makes brake fluid flow to liquid storage pot 13 by single chamber cylinder 11 to make push rod 14 produce the braking stroke, provide pedal feel for the driver and experience.
The push rod 14 is further provided with a displacement sensor, the displacement sensor is electrically connected with the controller 40, and the displacement sensor is used for detecting the stroke of the push rod 14 and sending a stroke signal to the controller 40. When a driver steps on the brake pedal, the brake pedal drives the push rod 14, the displacement sensor detects the brake stroke of the push rod 14, a brake stroke signal is generated and sent to the controller 40, and the controller 40 controls the hydraulic brake assembly 20 and the electronic brake assembly 30 to brake according to the brake stroke signal.
The hydraulic brake assembly 20 may be located at the front of the wheel for implementing front wheel braking, and the electronic brake assembly 30 may be located at the rear of the wheel for implementing rear wheel braking, or the hydraulic brake assembly 20 is disposed at the rear of the wheel for implementing rear wheel braking, and the electronic brake assembly 30 is disposed at the front of the wheel for implementing front wheel braking, that is, the specific arrangement manner of the hydraulic brake assembly 20 and the electronic brake assembly is not limited.
The hydraulic brake assembly 20 and the electric brake assembly 30 do not interfere with each other. For example, in some examples, the hydraulic brake assembly 20 is in a failure state, and the controller 40 can control the electronic brake assembly 30 to apply the brakes of the vehicle 1000 when the push rod 14 generates a brake stroke and the controller 40 receives a brake stroke signal. For another example, in other examples, the electric brake assembly 30 is in a failure state, and when the push rod 14 generates a brake stroke and the controller 40 receives a brake stroke signal, the controller 40 will control the hydraulic brake assembly 20 to apply the brakes of the vehicle 1000.
Like this, braking system 100 provides the footboard through pedal simulator 10 and feels for the driver, controls hydraulic braking subassembly 20 and electronic braking subassembly 30 by controller 40, realizes carrying out the quick braking and accurate braking to every wheel of vehicle 1000, adopts two kinds of braking modes of hydraulic braking and electronic braking to carry out vehicle 1000 simultaneously and brakies, on the one hand, has reduced the hydraulic pressure pipeline, is convenient for arrange of whole car framework. On the other hand, when any one braking mode fails, the other braking mode can work normally, so that the vehicle 1000 is braked, and the driving safety of the vehicle 1000 is effectively improved.
Referring to fig. 1, in some embodiments, the pedal simulator 10 further includes a first resilient return member 16. The first elastic return member 16 is located inside the single-chamber cylinder 11 and abuts against the single-chamber cylinder 11 and the piston 12, respectively.
Specifically, the first elastic restoring member 16 may be a spring or other element having elastic potential energy, when the driver depresses the brake pedal, the push rod 14 pushes the piston 12 to press the piston 12 against the first elastic restoring member 16, the first elastic restoring member 16 generates elastic deformation, and when the driver releases the brake pedal, the elastic force of the first elastic restoring member 16 restores the piston 12.
In some examples, the first elastic restoring member 16 restores the piston 12 to generate a restoring stroke of the push rod 14, and further, the displacement sensor located at the push rod 14 transmits a restoring stroke signal to the controller 40 to terminate the braking operation of the hydraulic brake assembly 20 and the electric brake assembly 30.
In other examples, the first elastic restoring member 16 restores the piston 12, so that the single cylinder 11 stops supplying the brake fluid to the hydraulic brake assembly 20, thereby terminating the braking operation of the hydraulic brake assembly 20.
It can be understood that the number of the first elastic restoring members 16 may be one, or may be multiple, the plurality of first elastic restoring members 16 form a brake pedal feeling under different brake strokes, and the specific type and number of the first elastic restoring members 16 are not limited herein.
In this way, by providing the first elastic return member 16, on the one hand, it is possible to return the piston 12, to generate a return stroke of the push rod 14, to end the braking, and to return the brake pedal without affecting the next use. On the other hand, the driver can be provided with brake pedal feel of different strokes.
Referring to fig. 1, in some embodiments, the push rod 14 includes an abutting portion 141 and a connecting portion 142, the connecting portion 142 extends from the abutting portion 141 to the piston 12, and the connecting portion 142 is movably connected to the piston 12. The pedal simulator 10 further includes a second elastic restoring member 17, and the second elastic restoring member 17 is sleeved on the connecting portion 142 and is abutted against the single-chamber cylinder 11 and the abutting portion 141, respectively.
Specifically, the connecting portion 142 and the piston 12 may be movably connected by means of abutting or clamping, the second elastic restoring member 17 is sleeved on the connecting portion 142, the second elastic restoring member 17 may be an element having elastic potential energy, such as a spring, the second elastic restoring member 17 is respectively abutted to the single-chamber cylinder 11 and the abutting portion 141, when the driver steps on the brake pedal, the abutting portion 141 abuts against the second elastic restoring member 17, so that the second elastic restoring member 17 elastically deforms, and when the second elastic restoring member 17 reaches an elastic limit, the connecting portion 142 pushes the piston 12 to move.
It is understood that the elastic potential energy of the second elastic restoring member 17 is smaller than that of the first elastic restoring member 16, and is not limited herein.
Thus, the second elastic reset piece 17 is sleeved on the connecting portion 142, so that the brake pedal feeling of the driver can be increased.
Referring to fig. 1, in some embodiments, the pedal simulator 10 further includes a second hydraulic line 18 and a second control valve 181, the single-chamber cylinder 11 is connected to the reservoir tank 13 through the second hydraulic line 18, and the second control valve 181 is disposed on the second hydraulic line 18.
Specifically, the second hydraulic line 18 is used for the circulation of brake fluid, so that the brake fluid can flow from the single-chamber cylinder 11 to the reservoir tank 13, and the second control valve 181 is used for controlling the flow rate of the brake fluid in the second hydraulic line 18.
In some examples, when the brake system 100 is in a normal state, a driver depresses a brake pedal, the push rod 14 pushes the piston 12 to move, so that the brake fluid in the single-chamber cylinder 11 flows into the second hydraulic pipeline 18, the brake fluid enters the reservoir 13 through the second control valve 181, and when the driver releases the brake pedal, the piston 12 is reset, and the brake fluid in the reservoir 13 enters the single-chamber cylinder 11, so as to form a brake fluid backflow.
Further, the opening degree of the second control valve 181 is adjustable, and the flow rate of the brake fluid in the second hydraulic line 18 can be controlled by adjusting the opening degree of the second control valve 181, thereby realizing a variety of pedal feel changes.
In other examples, the brake system 100 is in an abnormal state, the second control valve 181 is closed, and when the driver depresses the brake pedal, brake fluid flows from the single cylinder 11 into the first hydraulic line 15.
By providing the second hydraulic line 18 and the second control valve 181 in this manner, on the one hand, the brake fluid can be caused to flow back between the single-cylinder 11 and the reservoir tank 13. On the other hand, a variety of pedal feel variations can be achieved by adjusting the opening degree of the second control valve 181, thereby controlling the flow rate of the brake fluid.
Referring to fig. 1, in some embodiments, the hydraulic brake assembly 20 includes a first driver 21, a hydraulic pump 22, a third hydraulic line 24 and a hydraulic brake 23, the first driver 21 is connected to the controller 40 and the hydraulic pump 22, respectively, and the hydraulic pump 22 is further connected to the hydraulic brake 23 through the third hydraulic line 24. The first driver 21 is configured to drive the hydraulic pump 22 to supply the brake fluid to the hydraulic brake 23 through the third hydraulic line 24 according to the brake control signal of the controller 40 to brake the hydraulic brake 23.
Specifically, the hydraulic brake assembly 20 is used for braking the left and right front wheels of the vehicle 1000, the first driving member 21 may be a motor, the hydraulic brakes 23 may be plural, the hydraulic brakes 23 are connected to the wheels, and one hydraulic brake 23 is connected to each of the left and right front wheels. When the driver steps on the brake pedal, the push rod 14 generates a brake stroke, the displacement sensor sends a brake control signal corresponding to the brake stroke to the controller 40, and the controller 40 controls the first driving member 21 according to the brake control signal, so as to drive the hydraulic pump 22 to supply brake fluid to the hydraulic brake 23 through the third hydraulic line 24, thereby braking the left and right front wheels.
In some examples, the number of the first drivers 21 may be multiple, one hydraulic brake 23 is connected to each first driver 21, for example, the number of the first drivers 21 and the number of the hydraulic brake assemblies 20 may be two, one hydraulic brake assembly 20 is connected to each of the front left and right wheels of the vehicle 1000, and the controller 40 may control the front left and right wheels to generate braking by controlling the two first drivers 21 to pressurize the brake fluid and cause the brake fluid to flow to the hydraulic brake assemblies 20.
It should be noted that the hydraulic pump 22 is connected to the reservoir 13, and when the hydraulic pump 22 is engaged in braking, the brake fluid flows out, and the reservoir 13 will supplement the brake fluid to the hydraulic pump 22, so as to ensure the continuous operation of hydraulic braking. A check valve 261 is provided between the hydraulic pump 22 and the reservoir tank 13, and brake fluid can flow in one direction from the reservoir tank 13 to the hydraulic pump 22.
In this way, the controller 40 can control the hydraulic brakes 23 located at the wheels to perform wheel braking by controlling the first driving unit 21 to drive the hydraulic pump 22 to output a brake fluid amount corresponding to the brake stroke signal.
Referring to FIG. 1, in some embodiments, the pedal simulator 10 further includes a first hydraulic line 15 and a first control valve 151. The first hydraulic line 15 connects the single-chamber cylinder 11 and the hydraulic brake assembly 20, respectively, the first control valve 151 is provided on the first hydraulic line 15, and the first control valve 151 is closed in the case where the hydraulic brake assembly 20 and the controller 40 are normal, and is communicated in the case where the first driver 21 and/or the controller 40 are abnormal.
Specifically, the first hydraulic line 15 is used for circulating brake fluid, so that the brake fluid can flow from the single-chamber cylinder 11 to the hydraulic brake assembly 20, the first control valve 151 is located on the first hydraulic line 15, and the first control valve 151 is used for controlling the on/off of the first hydraulic line 15.
It can be understood that the controller 40, the hydraulic brake assembly 20 and the electronic brake assembly 30 include electronic components, and when the electronic components are interfered and fail, the vehicle 1000 cannot be braked, so that the driving safety is affected.
In some examples, the brake system 100 is in a normal state, the first control valve 151 is closed, the single-chamber cylinder 11 is disconnected from the hydraulic brake assembly 20, and the brake fluid cannot be circulated to the hydraulic brake assembly 20 through the first hydraulic line 15. When at least one of the controller 40 and the first driver 21 is out of order, the brake system 100 is in an abnormal state, the first control valve 151 is opened, and when the driver depresses the brake pedal, the push rod 14 pushes the brake fluid to flow out from the single cylinder 11 to the hydraulic brake 23 through the first hydraulic line 15, thereby braking the front left and right wheels of the vehicle 1000.
In this way, by providing the first hydraulic line 15 and the first control valve 151 and connecting the first hydraulic line 15 to the hydraulic brake 23 and the single-chamber cylinder 11, respectively, the vehicle 1000 can provide a brake fluid amount satisfying a braking deceleration demand to the hydraulic brake 23 through the single-chamber cylinder 11 when at least one of the controller 40 and the first driving element 21 is failed, thereby realizing deceleration or stop of the vehicle 1000 and improving driving safety of the vehicle 1000.
Referring to fig. 1, in some embodiments, the hydraulic brakes 23 include a plurality of hydraulic brakes, the third hydraulic line 24 includes a hydraulic main path 241 and a plurality of hydraulic branch paths 242 connected to the hydraulic main path 241, each hydraulic branch path 242 is connected to one hydraulic brake 23, and the hydraulic main path 241 is further connected to the hydraulic pump 22.
Specifically, the third hydraulic line 24 is used for flowing brake fluid, the main hydraulic path 241 is connected to the hydraulic pump 22 and the hydraulic branch 242, respectively, the hydraulic branch 242 includes a plurality of hydraulic branches 242, the plurality of hydraulic branches 242 are connected to the main hydraulic path 241 and the hydraulic brake 23, for example, the hydraulic brake 23 may be two, the hydraulic branch 242 may be two, the brake fluid flows out from the hydraulic pump 22 into the main hydraulic path 241, the brake fluid is branched in the main hydraulic path 241 and flows into the two hydraulic branches 242, respectively, so as to flow to the two hydraulic brakes 23, and the two hydraulic brakes 23 respectively brake the front left wheel and the front right wheel of the wheel.
It will be appreciated that the plurality of hydraulic branches 242 are also connected to the first hydraulic line 15, and when the brake system 100 is in an abnormal state, brake fluid flows from the first hydraulic line 15 to a portion of the hydraulic branches 242, and thus into the hydraulic brake 23 for braking.
Thus, by providing a plurality of hydraulic brakes 23 and a plurality of hydraulic branch lines 242, on the one hand, quick braking and precision braking of the left and right front wheels of the vehicle 1000 can be achieved. On the other hand, when one of the hydraulic brakes 23 fails, the other hydraulic brake 23 can also work normally, so that the vehicle 1000 brakes, and the driving safety of the vehicle 1000 is effectively improved.
Referring to fig. 1, in some embodiments, hydraulic brake assembly 20 further includes a hydraulic circuit 25, where hydraulic circuit 25 includes a main circuit 251 and a plurality of branch circuits 252 connected to main circuit 251, each branch circuit 252 is connected to a hydraulic brake 23, and main circuit 251 is further connected to reservoir 13.
Specifically, the hydraulic circuit 25 is used for flowing brake fluid, the main circuit 251 is connected with a plurality of branch circuits 252 and the reservoir tank 13, the plurality of branch circuits 252 are respectively connected with a plurality of hydraulic brakes 23 and the main circuit 251, and when the brake fluid enters the plurality of hydraulic brakes 23 to participate in braking of the vehicle 1000, the brake fluid enters the main circuit 251 through the plurality of branch circuits 252 and flows back to the reservoir tank 13 through the main circuit 251.
By providing the hydraulic circuit 25 in this manner, the brake fluid can be returned to the reservoir tank 13 after the brake fluid is involved in the braking of the hydraulic brake 23, thereby forming a brake fluid circulation.
Referring to FIG. 1, in some embodiments, the hydraulic brake assembly 20 further includes a third control valve 2411, a plurality of fourth control valves 2421, and a plurality of fifth control valves 2521. The third control valve 2411 is provided in the main hydraulic circuit 241, and a plurality of fourth control valves 2421 are provided in the plurality of hydraulic branch circuits 242, respectively. The fifth control valves 2521 are provided on the branch circuits 252, respectively.
Specifically, the third control valve 2411 is used for controlling the on-off of the hydraulic main circuit 241, the fourth control valve 2421 is used for controlling the on-off of the hydraulic branch circuit 242, and the fifth control valve 2521 is used for controlling the on-off of the branch circuit 252.
In some examples, the brake system 100 is in a normal state, the third control valve 2411, the plurality of fourth control valves 2421 and the plurality of fifth control valves 2521 are all in an open state, when the brake system 100 takes a braking measure, the brake fluid supplied from the hydraulic pump 22 is respectively introduced into the plurality of fourth control valves 2421 through the third control valve 2411, and after the brake fluid is involved in the braking of the hydraulic brake 23, the brake fluid is respectively introduced into the plurality of fifth control valves 2521 so as to be returned to the reservoir 13.
It should be noted that the braking force generated by the hydraulic brake 23 is determined by the flow rate of the brake fluid, and the larger the flow rate of the brake fluid is, the larger the braking force generated by the hydraulic brake 23 is. The braking force adjustment can be performed for the left and right front wheels, respectively, by adjusting the opening degrees of the plurality of fourth control valves 2421 and the plurality of fifth control valves 2521 to control the flow rate of the brake fluid.
In other examples, when the brake system 100 is in an abnormal state, the third control valve 2411 and the plurality of fifth control valves 2521 are closed, the plurality of fourth control valves 2421 are opened, and when the driver depresses the brake pedal, brake fluid flows from the single cylinder 11 to the plurality of fourth control valves 2421, respectively, and flows to the hydraulic brakes 23 through the fourth control valves 2421, thereby generating braking.
As such, by providing the third control valve 2411, the plurality of fourth control valves 2421, and the plurality of fifth control valves 2521, it is possible to control the flow of brake fluid to the hydraulic brakes 23 and the return flow, on the one hand. On the other hand, the braking force of the front left and right wheels can be adjusted by adjusting the opening degrees of the plurality of fourth control valves 2421 and the plurality of fifth control valves 2521.
Referring to fig. 1, in some embodiments, the hydraulic brake assembly 20 further includes a plurality of one-way flow lines 26, each one-way flow line 26 corresponds to one hydraulic branch 242, one end of the one-way flow line 26 is connected to the hydraulic brake 23, and the other end is connected to the main hydraulic path 241.
Specifically, the unidirectional circulation lines 26 are used for unidirectional flow of brake fluid, the number of the unidirectional circulation lines 26 is the same as that of the hydraulic branch lines 242, and each unidirectional circulation line 26 is connected with one hydraulic brake 23 and a hydraulic main line 241 respectively, and is used for brake fluid to flow from the hydraulic main line 241 to the hydraulic brake 23 through the unidirectional circulation line 26.
In some examples, a pressure sensor may be disposed on the hydraulic brake 23, and during the hydraulic braking, when the pressure sensor detects that the pressure of the hydraulic brake 23 does not meet the braking requirement and the opening degree of the fourth control valve 2421 reaches the limit, the hydraulic pump 22 may be controlled to increase the flow rate of the brake fluid, and the brake fluid flows from the hydraulic main circuit 241 to the hydraulic brake 23 through the one-way circulation line 26, so as to increase the pressure of the hydraulic brake 23, thereby meeting the braking requirement.
It can be understood that after the brake fluid participates in the braking of the hydraulic brake 23, the brake fluid will flow back, and the one-way circulation pipeline 26 is provided with a one-way valve 261, and the one-way valve 261 can ensure the one-way circulation of the brake fluid and prevent the brake fluid from flowing back to the hydraulic main pipeline 241.
Thus, by arranging the plurality of one-way circulation pipelines 26, when the pressure of the hydraulic brake 23 does not meet the braking requirement, brake fluid can flow to the hydraulic brake 23 through the one-way circulation pipelines 26, and the braking pressure of the hydraulic brake 23 is increased by increasing the flow of the brake fluid, so that the braking requirement is met, and the driving safety is improved.
Referring to fig. 1, in some embodiments, the electric brake assembly 30 includes a second driving member 31 and an electric brake 32, and the second driving member 31 is configured to drive the electric brake 32 to brake according to a brake control signal of the controller 40.
Specifically, the second driving member 31 may be a motor, the controller 40 may drive the electronic brake 32 by controlling the second driving member 31, the electronic brake 32 is located at the left and right rear wheels, the electronic brake 32 is used for braking the left and right rear wheels of the vehicle 1000, and when the controller 40 receives the brake stroke signal, the controller 40 controls the second driving member 31 to provide the electronic brake 32 with a braking force corresponding to the brake stroke signal, so that the electronic brake 32 brakes the left and right rear wheels.
In this way, by providing the second driver 31 and the electronic brake 32, the vehicle 1000 can be braked by the electronic brake 32 when the hydraulic brake 23 fails, and the driving safety of the vehicle 1000 is effectively improved.
Referring to fig. 1, in some embodiments, the second driving member 31 and the electronic brake 32 each include a plurality of electronic brakes 32, and each of the second driving members 31 corresponds to one of the electronic brakes 32.
Specifically, each of the second driving member 31 and the electronic brake 32 includes a plurality of electronic brakes 32, the plurality of electronic brakes 32 are respectively located at the left rear wheel and the right rear wheel, each of the electronic brakes 32 is correspondingly connected to one of the second driving members 31, and the controller 40 can control the plurality of second driving members 31 to drive the plurality of electronic brakes 32 to respectively brake the corresponding wheels. For example, the two electronic brakes 32 may be two, the two electronic brakes 32 are respectively connected to the left rear wheel and the right rear wheel of the vehicle 1000, and the controller 40 may drive the two electronic brakes 32 to brake the left rear wheel and the right rear wheel by controlling the two second driving members 31 to provide braking force for the two electronic brakes 32.
Thus, by providing the plurality of second driving members 31 and the plurality of electronic brakes 32, quick braking and accurate braking of the left and right rear wheels of the vehicle 1000 can be achieved.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A braking system, characterized in that, includes footboard simulator, hydraulic braking subassembly, electronic braking subassembly and controller, the controller respectively with footboard simulator, hydraulic braking subassembly, electronic braking subassembly electric connection, the footboard simulator includes:
the brake fluid pump comprises a single-cavity cylinder body, a brake fluid pump body and a brake fluid pump body, wherein the brake fluid pump body is internally provided with a brake fluid pump;
the piston is movably arranged in the single-cavity cylinder body;
the liquid storage tank is connected with the single-cavity cylinder body;
the push rod at least partially extends into the single-cavity cylinder body to be connected with the piston, and the push rod is configured to push the piston to move so that the brake fluid flows to the liquid storage tank to generate a braking stroke;
the controller is used for respectively controlling the hydraulic brake assembly and the electronic brake assembly to generate braking according to the braking stroke.
2. The braking system of claim 1, wherein the pedal simulator comprises:
first elasticity resets, first elasticity resets and is located single chamber cylinder body, and respectively with single chamber cylinder body with the piston butt.
3. The braking system of claim 1, wherein the push rod includes an abutment and a connecting portion extending from the abutment to the piston, the connecting portion being movably connected to the piston, the pedal simulator further comprising:
the second elasticity resets and locates the second elasticity resets, the second elasticity resets the cover on the connecting portion, and respectively with the single chamber cylinder body with butt portion butt.
4. The braking system of claim 1, wherein the pedal simulator further comprises:
the single-cavity cylinder body is connected with the liquid storage tank through the second hydraulic pipeline;
and the second control valve is arranged on the second hydraulic pipeline.
5. The braking system of claim 1, wherein the hydraulic brake assembly includes a first driver, a hydraulic pump, a third hydraulic line, and a hydraulic brake, the first driver being connected to the controller and the hydraulic pump, respectively, the hydraulic pump also being connected to the hydraulic brake through the third hydraulic line;
the first driver is configured to drive the hydraulic pump to supply brake fluid to the hydraulic brake through the third hydraulic line according to a brake control signal of the controller to brake the hydraulic brake.
6. The braking system of claim 5, wherein the pedal simulator further comprises:
the first hydraulic pipeline is respectively connected with the single-cavity cylinder body and the hydraulic brake assembly;
and the first control valve is arranged on the first hydraulic pipeline, is closed under the condition that the hydraulic brake assembly and the controller are normal, and is communicated under the condition that the first driving piece and/or the controller are abnormal.
7. A braking system according to claim 5 wherein the hydraulic brake includes a plurality of hydraulic brakes, the third hydraulic circuit including a main hydraulic circuit and a plurality of hydraulic branches connected to the main hydraulic circuit, each branch being connected to one of the hydraulic brakes, the main hydraulic circuit also being connected to the hydraulic pump.
8. The brake system of claim 7, wherein said hydraulic brake assembly further comprises a hydraulic circuit including a main circuit and a plurality of branch circuits connected to said main circuit, each of said branch circuits being connected to one of said hydraulic brakes, said main circuit being further connected to said reservoir tank.
9. The braking system of claim 8, wherein the hydraulic brake assembly further comprises:
the third control valve is arranged in the hydraulic main circuit;
the plurality of fourth control valves are respectively arranged on the plurality of hydraulic branches;
and the fifth control valves are respectively arranged on the branch circuits.
10. The braking system of claim 7, wherein the hydraulic brake assembly further comprises:
each one-way circulation pipeline corresponds to one hydraulic branch, one end of each one-way circulation pipeline is connected with the hydraulic brake, and the other end of each one-way circulation pipeline is connected with the hydraulic main road.
11. A braking system according to claim 1 wherein the electric brake assembly includes a second drive member and an electric brake, the second drive member being configured to actuate the electric brake to brake in dependence upon a brake control signal from the controller.
12. A braking system according to claim 11, wherein the second drive member and the electronic brake each comprise a plurality, one for each of the second drive members.
13. A vehicle comprising a braking system according to any one of claims 1 to 12.
CN202211079594.0A 2022-09-05 2022-09-05 Braking system and vehicle Active CN115384468B (en)

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