CN114954399B - Automobile braking system and automobile - Google Patents
Automobile braking system and automobile Download PDFInfo
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- CN114954399B CN114954399B CN202210671624.0A CN202210671624A CN114954399B CN 114954399 B CN114954399 B CN 114954399B CN 202210671624 A CN202210671624 A CN 202210671624A CN 114954399 B CN114954399 B CN 114954399B
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- 230000006837 decompression Effects 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 24
- 208000035874 Excoriation Diseases 0.000 description 16
- 238000005299 abrasion Methods 0.000 description 16
- 238000009826 distribution Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000005457 optimization Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses an automobile braking system and an automobile, and relates to the field of automobiles. Wherein, the pressure boosting 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 and rear wheel brake pipelines and used for detecting the pressure of the brake pipelines in real time; when the absolute value of the difference between the front wheel brake force and the rear wheel brake force is not in the first preset value range and the front wheel brake force is larger than the rear wheel brake force, the controller controls the decompression motor to work and reduces the oil pressure of the front wheel brake pipeline so as to reduce the front wheel brake force; meanwhile, the controller controls the booster motor to work and increases the oil pressure of a rear wheel braking pipeline so as to increase the braking force of the rear wheel brake. The brake system has the advantages that the problem that the heating performance of the front wheel brake is reduced by increasing the braking force of the rear wheel and reducing the braking force of the front wheel is avoided, the reliability is high, the safety of the brake system is improved, and meanwhile, the use cost of a vehicle is reduced.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile braking system and an automobile.
Background
The automobile hydraulic braking system compresses brake fluid through a pedal to generate braking pressure, locks a brake, and further realizes braking and stopping.
The driver presses the brake pedal, the brake liquid is pushed by the brake master cylinder, the brake master cylinder pressure and the pipeline pressure are generated through conversion, and meanwhile, the brake master cylinder pressure and the pipeline pressure are transmitted to the front disc brake and the rear disc brake or the drum brake through the pipeline, so that locking braking of the brake is realized; when the driver releases the brake pedal, the brake fluid returns to the master cylinder and the brake oil pot through the pipeline, so that the brake release is realized. At present, more vehicle types with hydraulic braking are all front disc brake, rear drum brake or disc brake structures, and the structures are widely applied to all the current hydraulic braking automobiles.
The brake system circuit in the technical scheme of the prior art is simple in structure, when a driver presses a brake pedal, brake fluid is pushed through a brake master cylinder, brake master cylinder pressure and pipeline pressure are generated through conversion, and meanwhile, the brake master cylinder pressure and the pipeline pressure are transmitted to a brake through a pipeline, so that locking braking of a front disc brake and a rear disc brake or a drum brake is realized. However, due to inertia, quick response of the front wheels, forward movement of the mass center of the whole vehicle during braking and other reasons, the braking force generated by the front wheels is larger, the rear wheels are smaller, and the braking is mainly close to the front disc brake, so that the phenomenon that the friction plate of the front disc brake is worn quickly often occurs. This type of brake circuit configuration is shown in fig. 1 and includes a front wheel brake 6, a rear wheel brake 8, a brake regulator 9, and a booster band master cylinder 11.
Disadvantages of the prior art:
the prior automobile generates friction force, namely braking force, by the contact friction of the friction plate of the front wheel disc type brake and the brake disc preferentially when the brake is frequently used due to factors of forward mass center and relatively fast front wheel in the braking process, particularly in mountain road working conditions, and the response of the rear wheel is relatively slow due to longer pipelines; therefore, the abrasion of the front wheel disc brake friction plate can be much faster than that of the rear wheel friction plate, so that the front wheel disc brake friction plate is worn out after a driver cab uses a vehicle to a certain kilometer, more friction materials remain on the rear wheel friction plate, a driver needs to go to a maintenance service station for replacement when the front wheel brake friction plate is replaced, the driver also needs to go to the maintenance service station for replacement again when the rear wheel is replaced, and meanwhile, the driver mistakenly considers that the quality of the front wheel friction plate is bad, so that the abrasion is fast, the subjective experience of the driver to the vehicle is influenced, and meanwhile, the use cost of the vehicle is increased.
Therefore, how to provide an automobile brake system and an automobile are technical problems to be solved in the art.
Disclosure of Invention
The invention aims to provide an automobile braking system and an automobile.
According to a first aspect of the present invention there is provided an automotive braking system comprising: the device comprises a controller, a booster motor, a decompression motor, a pressure sensor, a brake pipeline, a front wheel brake and a rear wheel brake;
the brake pipeline comprises a front wheel brake pipeline and a rear wheel brake pipeline; the pressure boosting 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 used for detecting the pressure of the brake pipeline in real time;
when the absolute value of the difference between the front wheel brake force and the rear wheel brake force is not in the first preset value range and the front wheel brake force is larger than the rear wheel brake force, the controller controls the decompression motor to work and reduces the oil pressure of the front wheel brake pipeline so as to reduce the front wheel brake force;
and/or
The controller controls the booster motor to operate to increase the oil pressure of the rear wheel brake pipeline so as to increase the braking force of the rear wheel brake.
Optionally, the pressure sensor is disposed on a circuit of the brake line.
Optionally, the 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 front wheel brake force is controlled and distributed by the controller, the absolute value of the difference value between the front wheel brake force and the rear wheel brake force is ensured to be in the range of F0-F1, so that the front and rear wheel brake force balance is realized, and the following conditions are specifically satisfied:
f, finishing before F and after F;
before-after, |=f0 to F1;
wherein,,
f, finishing: braking force of whole vehicle
Before F: front wheel brake force
After F: rear wheel brake force;
f0 to 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 by the aid of the braking parameters of the whole vehicle and the oil pressure collected by the pressure sensors.
Optionally, the brake system further comprises a brake pedal, a booster band master pump, a front wheel brake and a rear wheel brake;
the controller is connected with a booster belt master cylinder, the booster belt master cylinder is connected with a brake pedal, and the controller is respectively connected with a front wheel brake and a rear wheel brake through a front wheel brake pipeline and a 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 between the front wheel brake force and the rear wheel brake force is not within the first preset value range and the rear wheel brake force is greater than the front wheel brake force, the controller controls the decompression motor to operate, and reduces the oil pressure of the rear wheel brake pipeline to reduce the rear wheel brake force;
and/or
The controller controls the booster motor to operate to increase the oil pressure of the 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 comprising a 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 method has the following beneficial effects:
the invention solves the problem of customer complaints caused by early 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 using the vehicle by customers; 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 front wheel brake braking force is large, the problem of performance reduction caused by the front wheel brake scalding is easily caused, and the friction plate abrasion optimization system structure of the brake can avoid the problem of front wheel brake scalding by increasing the rear wheel braking force and reducing the front wheel braking force.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, 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 diagram of a prior art automotive braking system;
fig. 2 is a schematic structural view of an automobile brake system according to an embodiment;
FIG. 3 is a schematic control structure of an automotive braking system according to an embodiment;
fig. 4 is a schematic diagram of a whole vehicle stress analysis of an automobile brake system according to an embodiment.
Reference numerals illustrate: 1-decompression motor, 2-controller, 3-supercharging motor, 4-pressure sensor, 5-front brake pipeline, 6-front wheel brake, 7-rear wheel brake pipeline, 8-rear wheel brake, 9-brake regulator, 10-hydraulic oil pot, 11-booster with master pump, 12-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, 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 exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one 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 specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The invention aims to design an automobile braking system, in particular to a friction plate abrasion optimizing system structure of a brake, which solves the problem of customer complaints caused by early abrasion of front wheel brakes in a common automobile hydraulic braking system, particularly the problem that the front wheel brakes are easy to burn out and cause the reduction of braking force when the front wheel brakes are large under downhill working conditions such as mountain roads, and the problem that the front wheel brakes are reduced in burning performance can be avoided by increasing the braking force of rear wheels and reducing the braking force of front wheels; the practicality is strong, and the reliability is high, has promoted braking system security, reduces vehicle use cost simultaneously. The scheme is suitable for various hydraulic braking system structures.
According to a first aspect of the present invention, there is provided an automotive brake system, wherein a brake force distribution controller (hereinafter referred to as "controller") is added to a brake system circuit, a pressure sensor detects circuit pressure in real time in the circuit, and when it is detected and calculated that the front wheel brake force is excessive, a relevant command is executed to reduce the front brake line oil pressure, i.e. to achieve a reduction in the front wheel brake force and a reduction in wear of the front wheel brake pads. As shown in fig. 2 and 3, the control system includes: a controller 2, a booster motor 3, a decompression motor 1, a pressure sensor 4, a brake pipe, a front wheel brake 6 and a rear wheel brake 8;
the brake pipeline comprises a front wheel brake pipeline 5 and a rear wheel brake pipeline 7; the supercharging motor 3, the decompression motor 1 and the pressure sensor 4 are respectively and electrically connected with the controller 2; the pressure sensor is arranged on a circuit of the brake pipeline.
The four pressure sensors are respectively arranged on loops of brake pipelines of front and rear wheels of the automobile and used for detecting the pressure of the brake pipelines in real time;
when the absolute value of the difference between the braking force of the front wheel brake 6 and the braking force of the rear wheel brake 8 is not in the first preset value range and the braking force of the front wheel brake is larger than the braking force of the rear wheel brake, the controller controls the decompression motor to work, and reduces the oil pressure of the 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 the rear wheel brake pipeline so as to increase the braking force of the rear wheel brake;
it is generally preferable that if the front wheel braking force is excessively large, the decompression motor is operated to perform oil pressure decompression of the front brake pipe so as to reduce the front wheel brake force; meanwhile, the controller synchronously starts the booster motor, increases the oil pressure of the rear brake pipeline, increases the braking force of the rear wheel brake, and ensures that the sum of the braking force of the front wheel brake and the braking force of the rear wheel brake meets the braking force requirement of the whole vehicle.
The braking system comprises a braking circuit, a braking force distribution controller, a braking force sensor, a braking force calculation model, a braking force calibration data, a front wheel brake and a rear wheel brake, wherein the braking force distribution controller is arranged in the braking circuit, the pressure sensor in the controller can detect the oil pressure in a braking pipeline, the braking force calculation model and the braking force calibration data are simultaneously provided, 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, the braking force of the front wheel brake and the rear wheel brake is 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 braking liquid in the front braking pipeline, the pressure in the front wheel braking pipeline is reduced, the braking force of the front brake is reduced, and the braking oil pressure in the rear braking pipeline is increased by the starting motor, and the braking force of the rear brake is increased, so that the braking force of the front wheel brake and the braking force of the whole vehicle is relatively balanced, and the braking force requirement of the whole vehicle is met; the specific braking force distribution and oil pressure control can be realized through the calibration of the whole vehicle and the controller.
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 band master cylinder 11, a front wheel brake 6 and a rear wheel brake 8;
the controller 2 is connected to a booster band master cylinder 11, the booster band master cylinder 11 is connected to a brake pedal 12, and the controller 2 is connected to a front wheel brake 6 and a rear wheel brake 8 via a front wheel brake line 5 and a rear wheel brake line 7, respectively.
Working principle:
after the front wheel brake force is controlled and distributed by the controller, the absolute value of the difference value between the front wheel brake force and the rear wheel brake force is ensured to be in the range of F0-F1, so that the front wheel brake force and the rear wheel brake force are balanced, and the following conditions are specifically satisfied:
f, finishing before F and after F;
before-after, |=f0 to F1;
wherein,,
f, finishing: braking force of the whole vehicle;
before F: front wheel brake force;
after F: rear wheel brake force.
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 by the aid of the braking parameters of the whole vehicle and the oil pressure collected by the pressure sensors. The method comprises the steps that a pressure sensor detects the oil pressure of a brake circuit in real time, a controller indicates that a driver is braking when detecting the oil pressure in a brake pipeline, at the moment, the controller calculates the magnitude of front and rear braking force through a whole vehicle brake parameter (input into the controller in advance) and the oil pressure, compares the magnitude of the front and rear braking force through a braking force calculation model, compares the magnitude with a real vehicle calibration value (within a first preset value range), and if the front wheel braking force is too large, a decompression motor works to decompress the oil pressure of the front brake pipeline, so that the front wheel brake braking force is reduced; simultaneously, the controller synchronously starts the booster motor, increases the oil pressure of the rear brake pipeline, increases the braking force of the rear wheel brake, ensures that the sum of the braking force of the front wheel brake and the braking force of the rear wheel brake meets the braking force requirement of the whole vehicle, the specific braking force value can be realized through the calibration of the whole vehicle and the controller, the calibration value is stored in the controller so as to be compared and analyzed with the value calculated by the controller,
and after the front and rear wheel brake forces are distributed, the front and rear wheel brake force difference is ensured to be in the range of F0-F1, so that the front and rear wheel brake force balance is realized, and the abrasion of the front wheel brake friction plate is reduced.
Taking a certain miniature hydraulic braking car as an example:
the front disc rear drum brake configuration is shown in table 1:
the front sub-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
As shown in fig. 4, the whole car stress analysis is schematically shown, the specific parameters of the whole car stress analysis are shown in table 2 and table 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 Table 3
| No-load | Full load | |
| Front axle load | 1050 | 1200 |
| Rear axle load | 700 | 1995 |
| Total mass of | 1750 | 3195 |
Wherein,,
z1, the normal counterforce horizontally facing the front axle wheel during the braking of the automobile, N;
z2-the normal reaction force of the rear axle wheel horizontally facing when the automobile brakes, N;
l-automobile wheelbase, mm;
l1, the distance between the mass center of the automobile and the front axle, and mm;
l2, the distance between the mass center of the automobile and the rear axle, and mm;
hg, height of automobile mass center, mm;
g, the gravity of the automobile, N;
m-automobile mass, kg;
ψ: the ground adhesion coefficient is usually 0.7 to 0.8;
phi: adhesion coefficient;
q: braking strength;
beta: a braking force distribution coefficient;
and E, braking efficiency.
The braking force and braking torque calculation and front and rear brake braking force calculation are as follows:
braking force of the brake: f=0.95 ppi d2 DBr/4/R;
front disc brake braking torque 2628.19n.m;
wherein,,
r is the rolling radius of the tire;
p is the rated pressure of the braking system and is set to 10.00Mpa;
d is the diameter of the slave cylinder;
d is the brake diameter 3563.6;
br is the braking efficiency of the drum brake, and is 3.40;
the braking moment 3563.6 of the rear double collar-shoe drum brake;
TABLE 4 Table 4
| Project | Before F | After F | β |
| Braking force | 17403.97 | 14254.4 | 0.55 |
Therefore, the micro truck: the |F front-F back|, namely F0-F1, is set between 200N and 1000N, namely 200N and 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-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 front-rear brake force adjustment, so that the whole vehicle can obtain the maximum brake force provided by the front brake, and the braking performance and 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 the decompression of the rear brake pipeline and the pressurization of the front brake pipeline, so as to ensure the braking force distribution balance of the front and rear wheel brakes and reduce the 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 between the front wheel brake force and the rear wheel brake force is not in the first preset value range and the rear wheel brake force is larger than the front wheel brake force, the controller controls the decompression motor to work, and reduces the oil pressure of the rear wheel brake pipeline so as to reduce the rear wheel brake force;
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 a method and a principle for optimizing the distribution of the abrasion of friction plates of an automobile brake, in particular to a method and a principle for optimizing the distribution of the abrasion of the friction plates of a brake, when the brake working condition is frequently used in mountain roads and the like, under the condition that the abrasion of a front wheel is fast due to forward mass center and large front wheel braking force, the braking force of a front wheel brake and a rear wheel brake are redistributed and optimized in real time, the front wheel braking force is synchronously reduced, the rear wheel braking force is increased, the abrasion of the friction plates of the front wheel brake and the rear wheel brake is reduced, the abrasion life of the friction plates of the front wheel brake and the rear wheel brake is optimized, the front wheel friction plates and the rear wheel friction plates are synchronously abraded as far as possible (the abrasion is the abrasion of the friction plates reaches an alarm value, and the existing vehicle has a friction plate abrasion alarm structure), the time or mileage of the early abrasion of the friction plates of a driver is prolonged, and the driver can finish the replacement by going to a maintenance service station once, the subjective experience of the driver on the vehicle is improved, and the use cost of the vehicle is reduced.
In summary, the automobile brake system provided in this embodiment is actually a brake friction plate wear optimization system structure, which is simpler in structure and lower in cost, and solves the customer complaint problem caused by early wear of front wheel brakes in a common automobile hydraulic brake system, particularly, when the front wheel brakes are large under downhill working conditions such as mountain roads, the front wheel brakes are easy to burn and cause the problem of reduced braking force, and the brake friction plate wear optimization system structure can avoid the problem of reduced front wheel brake burn and scald performance by increasing the rear wheel braking force and reducing the front wheel braking force; the practicability is strong, and the reliability is high.
According to a second aspect of the present invention there is provided a vehicle comprising a vehicle body comprising the vehicle braking system of any one of the first aspects.
In summary, the embodiment solves the customer complaint problem caused by the early 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 the customer complaint; the system prolongs the service life of the friction plate of the front wheel brake and reduces the cost of using the vehicle by customers; 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 front wheel brake braking force is large, the problem of performance reduction caused by the front wheel brake scalding is easily caused, and the friction plate abrasion optimization system structure of the brake can avoid the problem of front wheel brake scalding by increasing the rear wheel braking force and reducing the front wheel braking force.
Although the present invention has been described in connection with the above embodiments, the present invention is not limited to the above embodiments, and the wear of the friction plates may be balanced, for example, by increasing the pressure reducing or increasing functions of the front and rear brake line oil pressure by adding different pressure sensors or other structures, or by increasing or decreasing the braking force of the front and rear wheel brakes by other methods, but is limited only by the appended claims, and modifications and variations thereof can be easily made by those skilled in the art without departing from the spirit and scope of the present invention.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the 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 (9)
1. An automotive braking system, comprising: the device comprises a controller, a booster motor, a decompression motor, a pressure sensor, a brake pipeline, a front wheel brake and a rear wheel brake;
the brake pipeline comprises a front wheel brake pipeline and a rear wheel brake pipeline; the pressure boosting 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 used for detecting the pressure of the brake pipeline in real time;
when the absolute value of the difference between the front wheel brake force and the rear wheel brake force is not in the first preset value range and the front wheel brake force is larger than the rear wheel brake force, the controller controls the decompression motor to work and reduces the oil pressure of the front wheel brake pipeline so as to reduce the front wheel brake force;
and/or
The controller controls the booster motor to work and increases the oil pressure of a rear wheel braking pipeline so as to increase the braking force of the rear wheel brake;
after the front wheel brake force is controlled and distributed by the controller, the absolute value of the difference value between the front wheel brake force and the rear wheel brake force is in the range of F0-F1 so as to realize the balance of the front wheel brake force and the rear wheel brake force, and specifically, the following conditions are satisfied:
f, finishing before F and after F;
before-after, |=f0 to F1;
wherein,,
f, finishing: braking force of whole vehicle
Before F: front wheel brake force
After F: rear wheel brake force;
f0 to F1 are the first preset value range;
F0-F1 is set between 200N-1000N, namely 200N-1000N is a first preset value range.
2. The vehicle brake system of claim 1, wherein the pressure sensor is disposed on a circuit of the brake pipe.
3. The vehicle brake system according to claim 2, wherein the four pressure sensors are provided in the circuits of the brake lines of the front and rear four wheels, respectively.
4. The vehicle brake system according to claim 1, wherein the controller calculates the vehicle brake force, the front wheel brake force, and the rear wheel brake force by the vehicle brake parameters and the oil pressure collected by the pressure sensor, and by a brake force calculation model.
5. The vehicle brake system of claim 4, further comprising a brake pedal, a booster band master pump, front wheel brakes, and rear wheel brakes;
the controller is connected with the booster zone master cylinder, the booster zone master cylinder is connected with the brake pedal, and the controller is connected with the front wheel brake and the rear wheel brake respectively through the front wheel brake pipeline and the rear wheel brake pipeline.
6. The automotive braking system of claim 5, wherein the braking system is a hydraulic braking system.
7. The vehicle brake system according to claim 6, wherein the front wheel brake is a disc brake; the rear wheel brake is a disc brake or a drum brake.
8. The vehicle brake system according to claim 1, wherein when the absolute value of the difference between the front wheel brake force and the rear wheel brake force is not within the first preset value range and the rear wheel brake force is greater than the front wheel brake force, the controller controls the decompression motor to operate, and reduces the oil pressure of the rear wheel brake line to reduce the rear wheel brake force;
and/or
The controller controls the booster motor to operate to increase the oil pressure of the front wheel brake pipeline so as to increase the braking force of the front wheel brake.
9. An automobile comprising an automobile body, said automobile body comprising an automobile brake system according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210671624.0A CN114954399B (en) | 2022-06-14 | 2022-06-14 | Automobile braking system and automobile |
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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 |
| 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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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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| CN114954399A (en) | 2022-08-30 |
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