CN114954399A - Automobile braking system and automobile - Google Patents
Automobile braking system and automobile Download PDFInfo
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- CN114954399A CN114954399A CN202210671624.0A CN202210671624A CN114954399A CN 114954399 A CN114954399 A CN 114954399A CN 202210671624 A CN202210671624 A CN 202210671624A CN 114954399 A CN114954399 A CN 114954399A
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- brake
- wheel brake
- braking force
- front wheel
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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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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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
- 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
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses an automobile brake system and an automobile, and relates to the field of automobiles. The pressure increasing motor, the pressure reducing motor and the pressure sensor are respectively and electrically connected with the controller; the pressure sensor is arranged on the front wheel brake pipeline and the rear wheel brake pipeline and used for detecting the pressure of the brake pipelines in real time; when the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is not in a first preset value range and the braking force of the front wheel brake is greater than that of the rear wheel brake, the controller controls the decompression motor to work to reduce the oil pressure of a front wheel brake pipeline so as to reduce the braking force of the front wheel brake; meanwhile, the controller controls the booster motor to work, and the oil pressure of a rear wheel brake pipeline is increased, so that the braking force of a rear wheel brake is increased. The problem of front wheel brake scalding performance decline is avoided through increase rear wheel braking force, reduction front wheel braking force, and the reliability is high, has promoted braking system security, reduces vehicle use cost simultaneously.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile braking system and an automobile.
Background
The hydraulic brake system of the automobile compresses brake fluid through a pedal to generate brake pressure, locks a brake and further realizes braking and parking.
The driver steps on a brake pedal, the brake fluid is pushed through a brake main cylinder, the pressure of the brake main cylinder and the pressure of a pipeline are generated through conversion, and meanwhile, the pressure is transmitted to a front disc brake and a rear disc brake or a drum brake through the pipeline, so that the brake is locked and braked; when the driver releases the brake pedal, the brake fluid returns to the master cylinder and the brake oil can through the pipeline, and therefore brake release is achieved. At present, most hydraulic braking vehicles are front disc brakes, rear drum brakes or disc brake structures, and the structures are generally applied to all current hydraulic braking vehicles.
The brake system in the technical scheme of the prior art is simple in loop structure, when a driver steps on a brake pedal, brake fluid is pushed through a brake master cylinder, the pressure of the brake master cylinder and the pressure of a pipeline are generated through conversion, and meanwhile, the pressure is transmitted to a brake through the pipeline, so that the locking braking of a front disc brake and a rear disc or drum brake is realized. However, when a common vehicle brakes, due to reasons of inertia, fast response of front wheels, forward movement of the mass center of the whole vehicle during braking and the like, the braking force generated by the front wheels is large, the rear wheels are small, and the brake mainly depends on a front disc brake, so that the phenomenon that the friction plates of the front disc brake are worn quickly often occurs. A brake circuit configuration of this type is shown in fig. 1 and includes a front wheel brake 6, a rear wheel brake 8, a brake modulator 9, and a booster master cylinder 11.
The prior art has the following disadvantages:
the existing automobile has the factors that the mass center moves forwards when braking and the front wheel is relatively fast, particularly under the working condition of mountain roads, when the brake is frequently used, a front wheel disc brake friction plate can be in contact with a brake disc preferentially to generate friction force, namely braking force, and the rear wheel is slow in response due to the fact that a pipeline is long; therefore, the wearing and tearing of front wheel disc brake friction disc can be more than the wearing and tearing of rear wheel friction disc, lead to the driver's cabin to use the vehicle to certain kilometer after, front wheel disc brake friction disc has worn out, the rear wheel friction disc still remains more friction material, it changes to need to go the maintenance service station when letting the driver change front wheel brake friction disc, it changes to need go the maintenance service station once more when changing the rear wheel, let the driver misunderstanding that the front wheel friction disc quality leads to the fast sensation of wearing and tearing not good simultaneously, influence the driver to the subjective experience of vehicle, increase the use cost of vehicle simultaneously.
Therefore, how to provide an automobile brake system and an automobile becomes a technical problem which needs to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide an automobile brake system and an automobile.
According to a first aspect of the present invention, there is provided a brake system for a vehicle, comprising: the brake system comprises a controller, a booster motor, a pressure reducing motor, a pressure sensor, a brake pipeline, a front wheel brake and a rear wheel brake;
the brake pipelines comprise a front wheel brake pipeline and a rear wheel brake pipeline; the pressure increasing motor, the pressure reducing motor and the pressure sensor are respectively and electrically connected with the controller;
the pressure sensors are respectively arranged on the front wheel brake pipeline and the rear wheel brake pipeline and are used for detecting the pressure of the brake pipelines in real time;
when the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is not in a first preset value range and the braking force of the front wheel brake is greater than that of the rear wheel brake, the controller controls the decompression motor to work to reduce the oil pressure of a front wheel brake pipeline so as to reduce the braking force of the front wheel brake;
and/or
The controller controls the booster motor to work, and increases the oil pressure of a rear wheel brake pipeline so as to increase the braking force of a rear wheel brake.
Optionally, the pressure sensor is provided on a circuit of the brake pipe.
Optionally, four pressure sensors are respectively arranged on the loops of the brake pipelines of the front wheel and the rear wheel of the automobile.
Optionally, after the braking force of the front wheel brake is controlled and distributed by the controller, the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is ensured to be in the range from F0 to F1, so as to realize the braking force balance of the front wheel brake and the rear wheel brake, and the following conditions are specifically met:
f is not less than F front + F back;
F0-F1 before-F after |;
wherein the content of the first and second substances,
f, finishing: braking force of whole vehicle
Before F: front wheel brake braking force
After F: rear wheel brake force;
F0-F1 are the first preset value range.
Optionally, the controller calculates the braking force of the whole vehicle, the braking force of the front wheel brake and the braking force of the rear wheel brake through the braking force calculation model according to the braking parameters of the whole vehicle and the oil pressure collected by the pressure sensor.
Optionally, the brake system further comprises a brake pedal, a booster master cylinder, a front wheel brake and a rear wheel brake;
the controller is connected with the booster master cylinder, the booster master cylinder is connected with the brake pedal, and the controller is respectively connected with the front wheel brake and the rear wheel brake through the front wheel brake pipeline and the rear wheel brake pipeline.
Optionally, the braking system is a hydraulic braking system.
Optionally, the front wheel brake is a disc brake; the rear wheel brake is a disc brake or a drum brake.
Optionally, when the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is not within the range of the first preset value, and the braking force of the rear wheel brake is greater than the braking force of the front wheel brake, the controller controls the decompression motor to work, and reduces the oil pressure of a rear wheel brake pipeline so as to reduce the braking force of the rear wheel brake;
and/or
The controller controls the booster motor to work, and increases the oil pressure of a front wheel brake pipeline so as to increase the braking force of the front wheel brake.
According to a second aspect of the present invention, there is provided a vehicle comprising a vehicle body including the vehicle brake system according to any one of the first aspects of the present invention.
According to the technical content disclosed by the invention, the following beneficial effects are achieved:
the invention solves the problem of customer complaints caused by the early wear of the front wheel brake in the hydraulic braking system of the common automobile, improves the wear replacement time of the friction plate of the front wheel brake and avoids the customer complaints; the system prolongs the service life of the friction plate of the front wheel brake, and reduces the cost of a customer for using the vehicle; the device has the advantages of strong practicability, simple principle, high reliability, wide application, simple structure and low manufacturing cost; particularly, under the working conditions of mountain roads and the like, when the braking force of the front wheel brake is large, the problem of performance reduction caused by scalding of the front wheel brake is easily caused, and the problem that the front wheel brake is scalded can be avoided by increasing the braking force of the rear wheel and reducing the braking force of the front wheel through the brake friction plate abrasion optimization system structure.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic illustration of a prior art automotive braking system;
FIG. 2 is a schematic structural diagram of a vehicle braking system according to an embodiment;
FIG. 3 is a schematic diagram of a control architecture of a vehicle braking system according to an embodiment;
fig. 4 is a schematic view of a whole vehicle stress analysis of the automobile braking system provided according to the embodiment.
Description of reference numerals: 1-a pressure reducing motor, 2-a controller, 3-a pressure increasing motor, 4-a pressure sensor, 5-a front brake pipeline, 6-a front wheel brake, 7-a rear wheel brake pipeline, 8-a rear wheel brake, 9-a brake regulator, 10-a hydraulic oil pot, 11-a booster with a master cylinder and 12-a brake pedal.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The invention aims to design an automobile brake system, in particular to a brake friction plate wear optimization system structure, which solves the problem of customer complaints caused by early wear of a front wheel brake in a common automobile hydraulic brake system, particularly the problem of braking force reduction caused by the fact that the front wheel brake is easily scalded when the braking force of the front wheel brake is large under downhill working conditions such as mountain roads and the like, and can avoid the problem of the performance reduction caused by the scalding of the front wheel brake by increasing the braking force of a rear wheel and reducing the braking force of the front wheel; the practicability is strong, the reliability is high, the safety of a braking system is improved, and the use cost of a vehicle is reduced. The scheme is suitable for various hydraulic braking system structures.
According to a first aspect of the present invention, a brake force distribution controller (hereinafter referred to as a controller) is added to a brake system loop, a pressure sensor is arranged in the loop to detect loop pressure in real time, and when the detected and calculated brake force of a front wheel brake is too large, a relevant command is executed to reduce the front brake line oil pressure, that is, to reduce the brake force of the front wheel brake, so as to reduce the wear of friction plates of the front wheel brake. As shown in fig. 2 and 3, the control system includes: the device comprises a controller 2, a booster motor 3, a pressure reducing motor 1, a pressure sensor 4, a brake pipeline, a front wheel brake 6 and a rear wheel brake 8;
the brake pipelines comprise a front wheel brake pipeline 5 and a rear wheel brake pipeline 7; the pressure increasing motor 3, the pressure reducing motor 1 and the pressure sensor 4 are respectively electrically connected with the controller 2; the pressure sensor is arranged on a loop of the brake pipeline.
The four pressure sensors are respectively arranged on loops of brake pipelines of the front wheel and the rear wheel of the automobile and used for detecting the pressure of the brake pipelines in real time;
when the absolute value of the difference value between the braking force of the front wheel brake 6 and the braking force of the rear wheel brake 8 is not within the range of a first preset value and the braking force of the front wheel brake is greater than the braking force of the rear wheel brake, the controller controls the decompression motor to work to reduce the oil pressure of a front wheel brake pipeline so as to reduce the braking force of the front wheel brake; and/or the controller controls the booster motor to work, and increases the oil pressure of a rear wheel brake pipeline so as to increase the braking force of a rear wheel brake;
in general, it is preferable that, if the front wheel brake force is too large, the pressure reducing motor is operated to reduce the front brake line oil pressure to reduce the front wheel brake force; meanwhile, the controller synchronously starts the booster motor, increases the oil pressure of a rear brake pipeline, increases the brake force of the rear wheel brake, and ensures that the sum of the brake force of the front wheel brake and the brake force of the rear wheel brake meets the requirement of the brake force of the whole vehicle.
The braking force distribution controller is arranged in the braking loop, a pressure sensor can detect the oil pressure in a braking pipeline, and the braking force distribution controller is provided with a braking force calculation model and braking force calibration data, when braking is carried out under various working conditions, the braking force of the front wheel brake is increased due to forward movement of a mass center, at the moment, the braking force of the front wheel brake and the braking force of the rear wheel brake are calculated by the controller through the oil pressure in the pipeline and braking parameters, if the braking force of the front wheel brake is overlarge, a signal is sent to the controller, the controller executes a command of starting a motor to suck back the braking liquid in the front braking pipeline according to a strategy, reduces the pressure in the front wheel braking pipeline, reduces the braking force of the front brake, simultaneously starts the motor to increase the braking oil pressure in the rear braking pipeline, increases the braking force of the rear brake, ensures that the braking forces of the front wheel brake and the rear wheel brake are relatively balanced, and simultaneously meets the requirement of the braking force of the whole vehicle; the specific control of the braking force distribution and the oil pressure can be realized by calibrating the whole vehicle and a controller.
The brake system is a hydraulic brake system, and the front wheel brake is a disc brake; the rear wheel brake is a disc brake or a drum brake. The brake system further comprises a brake pedal 12, a booster master cylinder 11, a front wheel brake 6 and a rear wheel brake 8;
the controller 2 is connected with a booster master cylinder 11, the booster master cylinder 11 is connected with a brake pedal 12, and the controller 2 is respectively connected with a front wheel brake 6 and a rear wheel brake 8 through a front wheel brake pipeline 5 and a rear wheel brake pipeline 7.
The working principle is as follows:
after the braking force of the front wheel brake is controlled and distributed by the controller, the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is ensured to be in the range of F0-F1, so that the braking force balance of the front wheel brake and the rear wheel brake is realized, and the following conditions are specifically met:
f is not less than F front + F back;
F0-F1 before-F after |;
wherein the content of the first and second substances,
f, finishing: braking force of the whole vehicle;
before F: front wheel brake braking force;
after F: and braking force of a rear wheel brake.
In the formula, the controller calculates the braking force of the whole vehicle, the braking force of the front wheel brake and the braking force of the rear wheel brake through the braking force calculation model according to the braking parameters of the whole vehicle and the oil pressure collected by the pressure sensor. The pressure sensor detects the oil pressure of a brake loop in real time, when the controller detects that the oil pressure exists in a brake pipeline, the controller indicates that a driver is braking, the controller calculates the magnitude of front and rear braking force through a braking force calculation model according to the braking parameters (input into the controller in advance) and the oil pressure of the whole vehicle, compares the magnitude of the front and rear braking force with a real vehicle standard value (within a first preset value range), and if the braking force of a front wheel is too large, a pressure reducing motor works to reduce the oil pressure of the front brake pipeline so as to reduce the braking force of the front wheel brake; meanwhile, the controller synchronously starts the booster motor, increases the oil pressure of a rear brake pipeline, increases the brake force of a rear wheel brake, ensures that the sum of the brake force of the front wheel brake and the brake force of the rear wheel brake meets the brake force requirement of the whole vehicle, the specific value of the brake force can be realized by calibrating the whole vehicle and the controller, the calibrated value is stored in the controller for comparison and analysis with the value calculated by the controller,
after braking force of front and rear wheel brakes is distributed, the braking force difference of the front and rear wheel brakes is ensured to be in the range of F0-F1, so that braking force balance of the front and rear wheel brakes is realized, and abrasion of friction plates of the front wheel brakes is reduced.
Take a certain micro hydraulic braking automobile as an example:
the front disc rear drum brake configuration is shown in table 1:
the front branch pump cylinder is a single cylinder, the diameter of the front brake is an effective radius, and the rear brake is a double cylinder.
TABLE 1
FIG. 4 is a schematic view of stress analysis of a whole vehicle, wherein specific parameters of the stress analysis of the whole vehicle are shown in tables 2 and 3, and table 2
| m | L 1 | L 2 | hg | L | |
| No load | 1750.00 | 1240.00 | 1860.00 | 520.00 | 3100.00 |
| Full load | 3195.00 | 1935.68 | 1164.32 | 650.00 | 3100.00 |
TABLE 3
| No load | Full load | |
| Front axle load | 1050 | 1200 |
| Rear axle load | 700 | 1995 |
| Total mass | 1750 | 3195 |
Wherein the content of the first and second substances,
z1-normal reaction force of the horizontal ground to the front axle wheel during braking of the automobile, N;
z2-normal reaction force of the horizontal ground to the rear axle wheels during braking of the automobile, N;
l is the automobile wheel base, mm;
l1-distance of the center of mass of the car from the front axle, mm;
l2-distance of the center of mass of the car from the rear axle, mm;
hg-vehicle centroid height, mm;
g-the weight to which the vehicle is subjected, N;
m is the mass of the automobile, kg;
psi: the ground adhesion coefficient is usually 0.7-0.8;
phi: an adhesion coefficient;
q: the braking strength;
beta: a braking force distribution coefficient;
and E, braking efficiency.
The braking force and braking torque calculation and the front and rear brake braking force calculation are as follows:
brake force of the brake: f is 0.95P pi d2 DBr/4/R;
front disc brake braking torque 2628.19 n.m;
wherein the content of the first and second substances,
r is the rolling radius of the tire;
p is the rated pressure of the braking system and is set to be 10.00 Mpa;
d is the diameter of the branch pump;
d is the brake diameter of 3563.6;
br is drum brake braking efficiency, and is taken as 3.40;
rear double collar shoe drum brake torque 3563.6;
TABLE 4
| Item | F front | F after | β |
| Braking force | 17403.97 | 14254.4 | 0.55 |
Therefore, the mini-truck: before and after | F, i.e. F0-F1 are set at 200N-1000N, i.e. 200N-1000N is a first preset value range.
If the front brake or the brake pipeline is damaged and fails, the brake force distribution controller does not participate in front and rear brake force adjustment, so that the whole vehicle can obtain the maximum brake force provided by the rear brake, and the brake performance and safety of the whole vehicle are ensured; and vice versa, if the rear brake and the brake pipeline are damaged or fail, the brake force distribution controller does not participate in the adjustment of the front brake force and the rear brake force, so that the whole vehicle can obtain the maximum brake force provided by the front brake, and the brake performance and the safety of the whole vehicle are ensured.
In some specific embodiments, if the braking force of the rear wheel is too large, the brake friction plate wear optimization system can also realize pressure reduction for the rear brake pipeline and pressure increase for the front brake pipeline, so as to ensure the braking force distribution balance of the front and rear wheel brakes and reduce premature replacement of the rear wheel or the front wheel brake friction plate caused by uneven wear of the front and rear wheel brake friction plates.
When the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is not within the range of a first preset value, and the braking force of the rear wheel brake is greater than that of the front wheel brake, the controller controls the decompression motor to work, and the oil pressure of a rear wheel brake pipeline is reduced so as to reduce the braking force of the rear wheel brake;
and/or the controller controls the booster motor to work to increase the oil pressure of the front wheel brake pipeline so as to increase the braking force of the front wheel brake.
The invention discloses an automobile braking system, in particular to a method and a principle for optimizing and distributing the abrasion of a brake friction plate, under the condition that the center of mass moves forwards and the front wheel has large braking force to cause the front wheel to be worn quickly when the braking condition is frequently used on mountains and the like, the braking force of the front wheel brake and the braking force of the rear wheel brake are distributed and optimized in real time again, the braking force of the front wheel is synchronously reduced, the braking force of the rear wheel brake is increased, thereby reducing the abrasion of the friction plate of the front wheel brake, optimizing the abrasion service life of the friction plate of the front wheel brake and the friction plate of the rear wheel brake, leading the friction plate of the front wheel brake and the friction plate of the rear wheel brake to be abraded synchronously as much as possible (the abraded friction plate refers to the friction plate is abraded to an alarm value, and the prior vehicles all have friction plate abrasion alarm structures), prolonging the time or mileage of the driver due to the premature abrasion of the friction plate of the front wheel brake, and the driver can finish the replacement by going to a maintenance service station once, so that the subjective experience of the driver on the vehicle is improved, and the use cost of the vehicle is reduced.
In conclusion, the automobile brake system provided by the embodiment is actually a brake friction plate abrasion optimization system structure, has a simple structure and low cost, solves the customer complaint problem caused by the early abrasion of the front wheel brake in the common automobile hydraulic brake system, and particularly solves the problem that the braking force is reduced because the front wheel brake is easily scalded when the braking force of the front wheel brake is large under the downhill working conditions such as mountain roads, and the like; the practicability is strong and the reliability is high.
According to a second aspect of the present invention, there is provided an automobile comprising an automobile body including the automobile brake system of any one of the first aspects.
In conclusion, the embodiment solves the problem of customer complaints caused by premature wear of the front wheel brake in the common automobile hydraulic brake system, improves the wear replacement time of the friction plate of the front wheel brake, and avoids customer complaints; the system prolongs the service life of the friction plate of the front wheel brake, and reduces the cost of a customer for using the vehicle; the device has the advantages of strong practicability, simple principle, high reliability, wide application, simple structure and low manufacturing cost; particularly, under the working conditions of mountain roads and the like, when the braking force of the front wheel brake is large, the problem of performance reduction caused by scalding of the front wheel brake is easily caused, and the problem that the front wheel brake is scalded can be avoided by increasing the braking force of the rear wheel and reducing the braking force of the front wheel through the brake friction plate abrasion optimization system structure.
Although the present invention has been described in conjunction with the above embodiments, the present invention is not limited to the above embodiments, and for example, the pressure reducing or pressurizing function of the oil pressure of the front and rear brake lines may be implemented by adding different pressure sensors or other structures, or the increasing or decreasing brake force of the front and rear brakes may be implemented by other methods to implement the wear equalization of the friction plates, and only limited by the appended claims, and those skilled in the art can easily modify and change the same without departing from the spirit and scope of the present invention.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A vehicle brake system, comprising: the brake system comprises a controller, a booster motor, a pressure reducing motor, a pressure sensor, a brake pipeline, a front wheel brake and a rear wheel brake;
the brake pipelines comprise a front wheel brake pipeline and a rear wheel brake pipeline; the pressure increasing motor, the pressure reducing motor and the pressure sensor are respectively electrically connected with the controller;
the pressure sensors are respectively arranged on the front wheel brake pipeline and the rear wheel brake pipeline and are used for detecting the pressure of the brake pipelines in real time;
when the absolute value of the difference value between the braking force of the front wheel brake and the braking force of the rear wheel brake is not in a first preset value range and the braking force of the front wheel brake is greater than that of the rear wheel brake, the controller controls the decompression motor to work to reduce the oil pressure of a front wheel brake pipeline so as to reduce the braking force of the front wheel brake;
and/or
The controller controls the booster motor to work, and increases the oil pressure of a rear wheel brake pipeline so as to increase the braking force of the rear wheel brake.
2. The automotive brake system of claim 1, wherein the pressure sensor is disposed on a circuit of the brake line.
3. The vehicle brake system according to claim 2, wherein the number of the pressure sensors is four, and the four pressure sensors are respectively arranged on the loops of the brake lines of the front and rear four wheels of the vehicle.
4. The brake system for vehicle according to claim 1, wherein the absolute value of the difference between the front wheel brake braking force and the rear wheel brake braking force is within the range of F0 to F1 after the front wheel brake braking force is controlled and distributed by the controller, so as to achieve the balance between the front wheel brake braking force and the rear wheel brake braking force, and the following conditions are satisfied:
f is not less than F front + F back;
F0-F1 before-F after |;
wherein the content of the first and second substances,
f, finishing: braking force of whole vehicle
Before F: front wheel brake braking force
After F: rear wheel brake force;
F0-F1 are the first preset value range.
5. The vehicle brake system according to claim 4, wherein the controller calculates the braking force of the entire vehicle, the braking force of the front wheel brake and the braking force of the rear wheel brake through the braking force calculation model according to the braking parameters of the entire vehicle and the oil pressure collected by the pressure sensor.
6. The automotive brake system of claim 5, further comprising a brake pedal, a booster master cylinder, a front wheel brake, and a rear wheel brake;
the controller is connected with the booster master cylinder, the booster master cylinder is connected with the brake pedal, and the controller is respectively connected with the front wheel brake and the rear wheel brake through a front wheel brake pipeline and a rear wheel brake pipeline.
7. The automotive brake system of claim 6, wherein the brake system is a hydraulic brake system.
8. The automotive brake system of claim 7, wherein the front wheel brake is a disc brake; the rear wheel brake is a disc brake or a drum brake.
9. The brake system for the vehicle according to claim 4, wherein when the absolute value of the difference between the braking force of the front wheel brake and the braking force of the rear wheel brake is not within the first preset value range, and the braking force of the rear wheel brake is greater than the braking force of the front wheel brake, the controller controls the decompression motor to operate to reduce the oil pressure of the brake pipe of the rear wheel so as to reduce the braking force of the rear wheel brake;
and/or
The controller controls the booster motor to work, and increases the oil pressure of a front wheel brake pipeline so as to increase the braking force of the front wheel brake.
10. A vehicle, characterized by comprising a vehicle body including the vehicle brake system according to any one of claims 1 to 9.
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| CN202210671624.0A CN114954399B (en) | 2022-06-14 | 2022-06-14 | Automobile braking system and automobile |
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| CN202210671624.0A CN114954399B (en) | 2022-06-14 | 2022-06-14 | Automobile braking system and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1071939A (en) * | 1996-08-30 | 1998-03-17 | Denso Corp | Vehicle behavior controller |
| JP2001253331A (en) * | 2000-03-14 | 2001-09-18 | Toyota Motor Corp | Braking force distribution control device for vehicle |
| WO2008110797A1 (en) * | 2007-03-12 | 2008-09-18 | Knorr-Bremse Systems For Commercial Vehicles Ltd | Trailer braking systems |
| JP2016190584A (en) * | 2015-03-31 | 2016-11-10 | 株式会社アドヴィックス | Braking control device for vehicle |
| CN112550261A (en) * | 2020-12-07 | 2021-03-26 | 安徽江淮汽车集团股份有限公司 | Method and system for controlling automobile braking residual pressure |
| CN112969619A (en) * | 2018-09-24 | 2021-06-15 | 株式会社爱德克斯 | Brake control device |
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2022
- 2022-06-14 CN CN202210671624.0A patent/CN114954399B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1071939A (en) * | 1996-08-30 | 1998-03-17 | Denso Corp | Vehicle behavior controller |
| JP2001253331A (en) * | 2000-03-14 | 2001-09-18 | Toyota Motor Corp | Braking force distribution control device for vehicle |
| WO2008110797A1 (en) * | 2007-03-12 | 2008-09-18 | Knorr-Bremse Systems For Commercial Vehicles Ltd | Trailer braking systems |
| JP2016190584A (en) * | 2015-03-31 | 2016-11-10 | 株式会社アドヴィックス | Braking control device for vehicle |
| CN112969619A (en) * | 2018-09-24 | 2021-06-15 | 株式会社爱德克斯 | Brake control device |
| CN112550261A (en) * | 2020-12-07 | 2021-03-26 | 安徽江淮汽车集团股份有限公司 | Method and system for controlling automobile braking residual pressure |
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| CN114954399B (en) | 2023-08-18 |
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