CN113978440A - Novel brake backup method and system - Google Patents
Novel brake backup method and system Download PDFInfo
- Publication number
- CN113978440A CN113978440A CN202111118299.7A CN202111118299A CN113978440A CN 113978440 A CN113978440 A CN 113978440A CN 202111118299 A CN202111118299 A CN 202111118299A CN 113978440 A CN113978440 A CN 113978440A
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- brake
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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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
- 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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to a novel brake backup method, which comprises the following steps: when the vehicle decelerates, the electric power-assisted brake system sends an application message comprising a pedal travel signal to a brake controller; if the electric power-assisted brake system fails, the application message also comprises a failure signal; if the brake controller receives an application message comprising a failure signal, calculating a corresponding dragging torque according to the pedal travel signal, and sending a signal to the motor controller to request the dragging torque to brake; if the application message cannot be received within the duration N seconds, the brake controller acquires a pedal signal to judge whether the pedal is stepped on, and if the pedal is stepped on, the brake controller sends a signal to the motor controller to request for the preset dragging torque brake; wherein N is a positive number. According to the brake backup method, the vehicle only provided with the ABS and the electric power-assisted brake system can also perform active pressure build-up braking when the electric power-assisted brake system fails.
Description
Technical Field
The invention belongs to the technical field of vehicle braking, and particularly relates to a novel braking backup method and system.
Background
In current vehicle systems, ABS anti-lock braking systems, ESC car electronic stability control systems, eboster electric power-assisted braking systems are commonly deployed in various vehicles. And the eboost system is failed due to environmental factors, and for a vehicle equipped with the ESC + eboost system, when the eboost system fails, the ESC system can actively build pressure and brake a vehicle motor, so as to stabilize the vehicle body. However, for a vehicle equipped with an ABS + eboster system, since the ABS system has no active pressure building capability, when the eboster system fails, the vehicle loses the brake boosting function, and only the driver steps on the pedal to push the piston to generate hydraulic pressure to drive deceleration, so that not only a large pedal force needs to be applied, but also the upper limit of deceleration is low, resulting in insufficient deceleration supply, which is likely to cause traffic accidents of the vehicle, and the functional safety redundancy is poor.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a novel brake backup method and system that meets one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel brake backup method, comprising:
when the vehicle decelerates, the electric power-assisted brake system sends an application message comprising a pedal travel signal to a brake controller; if the electric power-assisted brake system fails, the application message also comprises a failure signal;
if the brake controller receives an application message comprising a failure signal, calculating a corresponding dragging torque according to the pedal travel signal, and sending a signal to the motor controller to request the dragging torque to brake;
if the application message cannot be received within the duration N seconds, the brake controller acquires a pedal signal to judge whether the pedal is stepped on, and if the pedal is stepped on, the brake controller sends a signal to the motor controller to request for the preset dragging torque brake; wherein N is a positive number.
Preferably, the predetermined drag torque is a maximum drag torque.
On the other hand, the invention also provides a novel brake backup system, which comprises a brake controller, an electric power-assisted brake system and a motor controller which are connected with the brake controller, and a pedal which is connected with the brake controller and the electric power-assisted brake system;
the electric power-assisted brake system is configured to receive the pedal travel signal, send an application message including the pedal travel signal to the brake controller, and add a failure signal to the application message when the application message fails;
the brake controller is configured to calculate a corresponding dragging torque according to the pedal stroke signal and send a signal to the motor controller to request the dragging torque when receiving an application message including a failure signal; if the application message cannot be received within the duration N seconds, the brake controller acquires a pedal signal to judge whether the pedal is stepped on, and if the pedal is stepped on, the brake controller sends a signal to the motor controller to request for the preset dragging torque brake; wherein N is a positive number;
the motor controller is used for generating corresponding drag torque brake according to the drag torque requested by the brake controller.
Preferably, the predetermined drag torque is a maximum drag torque.
Preferably, the system further comprises a vehicle control unit, and the brake controller is integrated in the vehicle control unit.
Preferably, the brake controller is connected with the pedal through a brake signal switch, and the brake signal switch is switched on when the pedal is pressed, so as to send a pedal signal of the pressed pedal.
Compared with the prior art, the invention has the beneficial effects that:
through the redundant brake backup method and system, the vehicle only provided with the ABS and the electric power-assisted brake system can be ensured to be subjected to active pressure build-up braking when the electric power-assisted brake system fails, and the safety of the vehicle is improved.
Drawings
Fig. 1 is a block diagram of a novel brake backup system according to embodiment 1 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example (b):
the structural schematic diagram of the novel brake backup system of the embodiment is shown in fig. 1, and the novel brake backup system includes an electric power-assisted brake system 1, a brake controller 2, a motor controller 3 and a pedal 4. The electric power-assisted brake system 1 and the motor controller 3 are connected with the brake controller 2, and the pedal 4 is respectively connected with the electric power-assisted brake system 1 and the brake controller 2.
The electric power-assisted brake system 1 acquires a pedal travel signal of the pedal 4 during normal operation to acquire the intention of a driver, so that an application message including the pedal travel signal is continuously sent to the brake controller 2, and the pressure is actively built for deceleration according to the pedal travel. When the electric power-assisted brake system 1 fails, active voltage building cannot be performed, a failure flag bit is additionally added in an application message, and a failure signal is sent to the brake controller 2.
After receiving the application message including the failure signal, the brake controller 2 calculates the corresponding dragging torque according to the pedal stroke signal in the application message, the longer the pedal stroke is, the larger the dragging torque is, and then requests the calculated dragging torque to the motor controller, so that the brake system 1 can assist the driver in decelerating even if the electric power-assisted brake system fails.
If the communication between the electric power-assisted brake system 1 and the brake controller 2 fails and the brake controller 2 cannot receive the application message, the pedal signal of the pedal 4 is acquired after the application message cannot be received for N seconds, and whether the pedal is stepped down is judged. And if the pedal is confirmed to be stepped on, sending a signal to the motor controller to request a preset dragging torque so as to assist in speed reduction.
As a modification, the preset drag torque of the brake controller 2 is set to the maximum drag torque to assist deceleration at a deceleration as high as possible, thereby improving safety.
As an improvement, the brake controller 2 is integrated into a vehicle controller of the vehicle, so as to improve the degree of vehicle integration.
The pedal 4 is supplemented with a brake signal switch which is switched on when the pedal 4 is depressed, sending a pedal signal to transmit information that the pedal has been depressed.
The novel brake backup method of the structure is as follows:
when the vehicle decelerates, the electric power-assisted brake system 1 sends an application message including a pedal travel signal to the brake controller 2; if the electric power-assisted brake system 1 fails, sending an application message which also comprises a failure signal to the brake controller 2;
if the brake controller 2 receives an application message comprising a failure signal, calculating a corresponding dragging torque according to the pedal travel signal, and sending a signal to the motor controller 3 to request the dragging torque to brake;
if the application message cannot be received within the duration N seconds, the brake controller 2 acquires a pedal signal to judge whether the pedal 4 is stepped on, and if the pedal is stepped on, sends a signal to the motor controller 3 to request for the preset dragging torque brake; wherein N is a positive number.
As a modification, the drag torque of the brake controller 2 is set to the maximum drag torque.
It should be noted that the above embodiments can be freely combined as necessary. While the foregoing has described in detail only the preferred embodiments and principles of the present invention, it will be apparent to those skilled in the art that variations may be made in the embodiments based on the teachings of the present invention and such variations are considered to be within the scope of the present invention.
Claims (6)
1. A novel brake backup method is characterized by comprising the following steps:
when the vehicle decelerates, the electric power-assisted brake system sends an application message comprising a pedal travel signal to a brake controller; if the electric power-assisted brake system fails, the application message also comprises a failure signal;
if the brake controller receives an application message comprising a failure signal, calculating a corresponding dragging torque according to the pedal travel signal, and sending a signal to the motor controller to request the dragging torque to brake;
if the application message cannot be received within the duration N seconds, the brake controller acquires a pedal signal to judge whether the pedal is stepped on, and if the pedal is stepped on, the brake controller sends a signal to the motor controller to request for the preset dragging torque brake; wherein said N is a positive number.
2. A novel brake back-up method as claimed in claim 1, wherein said predetermined drag torque is a maximum drag torque.
3. A novel brake backup system is characterized by comprising a brake controller, an electric power-assisted brake system and a motor controller which are connected with the brake controller, and a pedal which is connected with the brake controller and the electric power-assisted brake system;
the electric power-assisted brake system is configured to receive a pedal travel signal, send an application message including the pedal travel signal to the brake controller, and add a failure signal to the application message when the application message fails;
the brake controller is configured to calculate a corresponding drag torque according to a pedal stroke signal and send a signal to the motor controller to request the drag torque when receiving an application message including a failure signal; if the application message cannot be received within the duration N seconds, the brake controller acquires a pedal signal to judge whether the pedal is stepped on, and if the pedal is stepped on, the brake controller sends a signal to the motor controller to request for the preset dragging torque brake; wherein said N is a positive number;
the motor controller is used for generating corresponding drag torque braking according to the drag torque requested by the brake controller.
4. A novel brake backup system according to claim 3, characterized in that said predetermined drag torque is a maximum drag torque.
5. A novel brake backup system according to claim 3, characterized in that the system further comprises a vehicle control unit, wherein the brake controller is integrated in the vehicle control unit.
6. A novel brake backup system according to claim 3, wherein the brake controller is connected with the pedal through a brake signal switch, and when the pedal is pressed, the brake signal switch is turned on to send a pedal signal of the pressed pedal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111118299.7A CN113978440A (en) | 2021-09-24 | 2021-09-24 | Novel brake backup method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111118299.7A CN113978440A (en) | 2021-09-24 | 2021-09-24 | Novel brake backup method and system |
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| Publication Number | Publication Date |
|---|---|
| CN113978440A true CN113978440A (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111118299.7A Pending CN113978440A (en) | 2021-09-24 | 2021-09-24 | Novel brake backup method and system |
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| CN (1) | CN113978440A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889576A (en) * | 2022-04-27 | 2022-08-12 | 江苏开沃汽车有限公司 | Automobile brake backup system and working method thereof |
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| CN108454458A (en) * | 2018-01-25 | 2018-08-28 | 北京新能源汽车股份有限公司 | A kind of motor control method, device and automobile |
| CN109050264A (en) * | 2018-06-27 | 2018-12-21 | 北京长城华冠汽车科技股份有限公司 | The braking method and device of electric vehicle |
| CN110606070A (en) * | 2019-08-30 | 2019-12-24 | 驭势科技（北京）有限公司 | Intelligent driving vehicle and braking method thereof, vehicle-mounted equipment and storage medium |
| CN112373455A (en) * | 2020-11-12 | 2021-02-19 | 安徽江淮汽车集团股份有限公司 | Automobile motor braking method, device, equipment and storage medium |
| CN113232640A (en) * | 2021-05-31 | 2021-08-10 | 重庆长安汽车股份有限公司 | Vacuum failure auxiliary brake control system of electric automobile |
| US20210291665A1 (en) * | 2019-06-30 | 2021-09-23 | Huawei Technologies Co., Ltd. | Brake Assistance System and Brake Method |
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2021
- 2021-09-24 CN CN202111118299.7A patent/CN113978440A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090067332A (en) * | 2007-12-21 | 2009-06-25 | 김용규 | Electric power steering device using angle's value of brake pedal |
| CN105083250A (en) * | 2014-04-22 | 2015-11-25 | 博世汽车部件(苏州)有限公司 | Control system for vacuum brake power-assisted system |
| CN108454458A (en) * | 2018-01-25 | 2018-08-28 | 北京新能源汽车股份有限公司 | A kind of motor control method, device and automobile |
| CN109050264A (en) * | 2018-06-27 | 2018-12-21 | 北京长城华冠汽车科技股份有限公司 | The braking method and device of electric vehicle |
| US20210291665A1 (en) * | 2019-06-30 | 2021-09-23 | Huawei Technologies Co., Ltd. | Brake Assistance System and Brake Method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114889576A (en) * | 2022-04-27 | 2022-08-12 | 江苏开沃汽车有限公司 | Automobile brake backup system and working method thereof |
| CN114889576B (en) * | 2022-04-27 | 2023-09-22 | 江苏开沃汽车有限公司 | Automobile brake backup system and working method thereof |
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Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Applicant after: United New Energy Automobile Co.,Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Applicant before: Hozon New Energy Automobile Co., Ltd. |