CN111267804A - Integrated control system of anti-lock braking system and electronic parking braking system - Google Patents
Integrated control system of anti-lock braking system and electronic parking braking system Download PDFInfo
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- CN111267804A CN111267804A CN202010164455.2A CN202010164455A CN111267804A CN 111267804 A CN111267804 A CN 111267804A CN 202010164455 A CN202010164455 A CN 202010164455A CN 111267804 A CN111267804 A CN 111267804A
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- control unit
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- processing module
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
- B60T8/17551—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve determining control parameters related to vehicle stability used in the regulation, e.g. by calculations involving measured or detected parameters
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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
- B60T13/74—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 electrical assistance or drive
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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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses an integrated control system of an anti-lock braking system and an electronic parking braking system, which relates to the technical field of intelligent driving of automobiles and comprises an electronic control unit and a hydraulic unit, wherein the electronic control unit is in bidirectional signal connection with the hydraulic unit and comprises an MCU (microprogrammed control unit) controller, a wheel speed processing module, a hydraulic processing module and an acceleration processing module, the MCU controller is in electric signal connection with a power supply, a parking control switch, a caliper motor, a wheel speed sensor and a hydraulic sensor, the MCU controller comprises an acceleration sensor and a current voltage sensor, the acceleration sensor is used for measuring the acceleration of wheels, and the current voltage sensor is used for measuring the current voltage of the caliper motor. The invention effectively shortens the parking braking response time, integrates the original two control systems into one control system, improves the intelligent performance of the system and reduces the cost.
Description
Technical Field
The invention relates to the technical field of intelligent driving of automobiles, in particular to an integrated control system of an anti-lock braking system and an electronic parking braking system.
Background
The Antilock Brake System (ABS) is called as an Antilock Brake System (ABS). The system distributes brake fluid with certain pressure input by the master cylinder, and realizes the pressure maintaining and releasing actions of the four-wheel cylinder. The working principle of the brake is that the brake is controlled through a logic threshold value, the threshold value is set according to the automobile slip rate and the wheel acceleration, the automobile is prevented from being locked in the braking process through regulating the pressure of a wheel cylinder, and the adhesion force between the wheel and the ground is ensured to be at the maximum value. An electric park brake system (electric park brake) is abbreviated EPB. The parking braking module judges the vehicle state according to information such as wheel speed and acceleration, collects the current voltage of the caliper motor to judge the current state of the actuator, controls the action of the caliper motor according to a switch command or bus information, and realizes related functions of clamping release and dynamic braking of the caliper during parking. And monitoring the terminal voltage and current of the motor in real time in the clamping and releasing process of the caliper, estimating the movement stroke of the caliper, the clamping force and the time for reaching the contact point of the friction plate and the brake disc according to the information, and controlling the action and the stop of the motor after reaching a threshold value.
However, in the field of intelligent driving of automobiles, most of the controllers of the ABS and the EPB are independent of each other, so that it is difficult to satisfy the requirements of intelligent driving and safety redundancy, and improvement is urgently needed.
Disclosure of Invention
Aiming at the problem in practical application, the invention aims to provide an integrated control system of a brake anti-lock system and an electronic parking brake system, and the specific scheme is as follows:
an integrated control system of an anti-lock brake system and an electronic parking brake system comprises an electronic control unit and a hydraulic unit, wherein the electronic control unit is in bidirectional signal connection with the hydraulic unit;
the electronic control unit comprises an MCU controller, the MCU controller is in electric signal connection with a power supply, a parking control switch, a caliper motor, a wheel speed sensor and a hydraulic sensor, the MCU controller comprises an acceleration sensor and a current voltage sensor, the acceleration sensor is used for measuring the acceleration of a wheel, and the current voltage sensor is used for measuring the current voltage of the caliper motor;
the electronic control unit further comprises a wheel speed processing module, a hydraulic processing module and an acceleration processing module, wherein the wheel speed processing module is used for acquiring pulse signals of the wheel speed sensor and converting the pulse signals into wheel speed values, the hydraulic processing module is used for acquiring voltage signals of the pressure sensor and converting the voltage signals into master cylinder real-time hydraulic pressure values, and the acceleration processing module is used for acquiring transverse and bus acceleration of a vehicle.
Preferably, the power supply is connected to the electronic control unit through two independent power supplies, so that independent power supplies to the caliper motors on the left side and the right side are realized, and the reliability of the system is improved.
Further preferably, the electronic control unit includes a power supply module, and the power supply module is configured to perform voltage transformation processing on an externally input power supply and monitor the voltage transformation processing.
Further preferably, the electronic control unit includes a power management module, and the power management module is responsible for state jumping and power supply management among different chips in the power-on and power-off processes.
Further preferably, the parking control switch is electrically connected with the MCU controller through four paths of pulse signals, and a clamping release command is transmitted through the combination of different pulse signals, so that the triggering misoperation is prevented.
Further preferably, the positive and negative wires of the caliper motor are connected with the electronic control unit to realize positive and negative rotation control of the caliper motor and acquisition of voltage and current of the caliper motor.
Compared with the prior art, the invention has the following beneficial effects:
the invention integrates the original anti-lock braking system and the electronic parking braking system in the same integrated control unit, the two systems share hardware resources, and exchange information through an appointed interface. The combination of the two control logics realizes the maximum utilization of hardware resources through unified operating system management, unified fault management, data storage, diagnosis and external communication interface modules, and reduces the possibility of errors of a complex system. Compared with a traditional braking anti-lock system and an electronic parking braking system, the integrated control system shortens the parking braking response time, improves the parking braking performance, saves the quality and the equipment space of a vehicle, is integrated into one control system from two original control systems, and effectively reduces the cost while improving the intelligent performance of the system.
Drawings
Fig. 1 is an overall schematic diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
As shown in fig. 1, the integrated control system of the anti-lock braking system and the electronic parking braking system comprises an electronic control unit and a hydraulic unit, wherein the electronic control unit is in bidirectional signal connection with the hydraulic unit. The hydraulic unit is connected with the front cavity and the rear cavity of the main cylinder through two brake pipes, and meanwhile, four paths of output of the hydraulic unit are respectively connected with the four-wheel cylinders.
The electronic control unit comprises an MCU controller, and the MCU controller is in electric signal connection with a power supply, a parking control switch, a caliper motor, a wheel speed sensor and a hydraulic sensor. The wheel speed sensor is connected with the wheel cylinders and used for testing real-time wheel speeds of the wheel cylinders. The hydraulic sensor is connected with the master cylinder and used for testing the real-time hydraulic pressure of the master cylinder. The parking control switch is electrically connected with the MCU controller through four paths of pulse signals, and a command of clamping and releasing is transmitted through the combination of different pulse signals, so that the triggering misoperation is prevented. The power supply is connected to the electronic control unit through two independent power supplies, so that independent power supply for caliper motors on the left side and the right side is achieved, and system reliability is improved. And the MCU controller comprises an acceleration sensor and a current-voltage sensor, wherein the acceleration sensor is used for measuring the acceleration of the wheel, and the current-voltage sensor is used for measuring the current voltage of the caliper motor. The positive and negative wires of the caliper motor are connected with the electronic control unit to realize positive and negative rotation control of the caliper motor and acquisition of voltage and current of the caliper motor.
The electronic control unit further comprises a wheel speed processing module, a hydraulic processing module and an acceleration processing module, wherein the wheel speed processing module is used for acquiring a pulse signal of a wheel speed sensor and converting the pulse signal into a wheel speed value, the hydraulic processing module is used for acquiring a voltage signal of a pressure sensor and converting the voltage signal into a master cylinder real-time hydraulic pressure value, and the acceleration processing module is used for acquiring transverse and bus acceleration of a vehicle. The electronic control unit comprises a power supply module, and the power supply module is used for carrying out voltage transformation processing on an externally input power supply and monitoring. The electronic control unit comprises a power supply management module, and the power supply management module is responsible for state jumping and power supply management among different chips in the power-on and power-off process.
When the vehicle is braked, a driver steps on a brake pedal to enter a pressure boosting stage, all the electromagnetic valves are kept in a power-off state, and brake fluid directly enters all the wheel cylinders through the master cylinder and the pressure reducing valve and the pressure boosting valve. When pressure maintenance is needed, the pressure increasing valve is electrified to close, the hydraulic circuit between the wheel cylinder and the master cylinder is completely isolated, and the pressure in the wheel cylinder is kept constant. When the wheel pressure is too high and has a locking tendency, the wheel pressure is required to be reduced, at the moment, the pressure reducing valve is electrified to be opened, the pressure increasing valve is electrified to be closed, the motor is electrified to drive the plunger pump to move, the brake fluid flows back to the low-pressure energy accumulator from the wheel cylinder through the pressure reducing valve, and the plunger pump pumps the brake fluid in the energy accumulator back to the brake master cylinder with higher pressure through reciprocating motion. The pressure reducing valve, the pressure increasing valve and the energy accumulator are of an HCU controller internal structure, and the HCU is an actuating mechanism of an anti-lock braking system, so that the common knowledge is informed to the technical field, and the details are not repeated.
During parking braking, the vehicle state is judged according to signals of a wheel speed processing module, a hydraulic processing module and an acceleration processing module in the electronic control unit, such as the wheel speed of a wheel cylinder and the acceleration of a vehicle, the current state of the caliper is judged according to the current voltage of the caliper motor acquired by the current voltage sensor, and the electronic control unit controls the action of the caliper motor by combining the vehicle state and the caliper state, so that the functions of clamping or releasing the caliper and dynamic braking during parking are realized. The power supply module is used for monitoring the terminal voltage and the current of the caliper motor in real time in the clamping and releasing process of the caliper, estimating the movement stroke of the caliper, the clamping force and the time reaching the contact point of the friction plate and the brake disc according to the information, and controlling the action and the stop of the caliper motor after the threshold value is reached so as to realize parking braking.
The invention integrates the original anti-lock braking system and the electronic parking braking system in the same integrated control unit, the two systems share hardware resources, and exchange information through an appointed interface. The combination of the two control logics realizes the maximum utilization of hardware resources through unified operating system management, unified fault management, data storage, diagnosis and external communication interface modules, and reduces the possibility of errors of a complex system. Compared with a traditional braking anti-lock system and an electronic parking braking system, the integrated control system shortens the parking braking response time, improves the parking braking performance, saves the quality and the equipment space of a vehicle, is integrated into one control system from two original control systems, and effectively reduces the cost while improving the intelligent performance of the system.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. The integrated control system of the anti-lock braking system and the electronic parking braking system is characterized by comprising an electronic control unit and a hydraulic unit, wherein the electronic control unit is in bidirectional signal connection with the hydraulic unit;
the electronic control unit comprises an MCU controller, the MCU controller is in electric signal connection with a power supply, a parking control switch, a caliper motor, a wheel speed sensor and a hydraulic sensor, the MCU controller comprises an acceleration sensor and a current voltage sensor, the acceleration sensor is used for measuring the acceleration of a wheel, and the current voltage sensor is used for measuring the current voltage of the caliper motor;
the electronic control unit further comprises a wheel speed processing module, a hydraulic processing module and an acceleration processing module, wherein the wheel speed processing module is used for acquiring pulse signals of the wheel speed sensor and converting the pulse signals into wheel speed values, the hydraulic processing module is used for acquiring voltage signals of the pressure sensor and converting the voltage signals into master cylinder real-time hydraulic pressure values, and the acceleration processing module is used for acquiring transverse and bus acceleration of a vehicle.
2. The integrated control system of an anti-lock brake system and an electronic parking brake system according to claim 1, wherein the power supply is connected to the electronic control unit through two independent power supplies, so as to realize independent power supply to the caliper motors on the left and right sides, thereby improving system reliability.
3. The integrated brake anti-lock braking system and electronic parking brake system according to claim 1, wherein the electronic control unit comprises a power supply module for transforming and monitoring an externally inputted power.
4. The integrated brake anti-lock braking system and electronic parking brake system according to claim 1, wherein the electronic control unit comprises a power management module, and the power management module is responsible for state jump and power supply management between different chips in power-on and power-off processes.
5. The integrated control system of an anti-lock brake system and an electronic parking brake system according to claim 1, wherein the parking control switch is electrically connected to the MCU controller through four pulse signals, and transmits a command for releasing the clamping through a combination of different pulse signals, thereby preventing a malfunction from being triggered.
6. The integrated control system of an anti-lock brake system and an electronic parking brake system according to claim 1, wherein positive and negative wires of the caliper motor are connected to the electronic control unit to realize positive and negative rotation control of the caliper motor and acquisition of voltage and current of the caliper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010164455.2A CN111267804A (en) | 2020-03-11 | 2020-03-11 | Integrated control system of anti-lock braking system and electronic parking braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010164455.2A CN111267804A (en) | 2020-03-11 | 2020-03-11 | Integrated control system of anti-lock braking system and electronic parking braking system |
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| Publication Number | Publication Date |
|---|---|
| CN111267804A true CN111267804A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010164455.2A Pending CN111267804A (en) | 2020-03-11 | 2020-03-11 | Integrated control system of anti-lock braking system and electronic parking braking system |
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| CN (1) | CN111267804A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111776015A (en) * | 2020-07-28 | 2020-10-16 | 株洲中车时代电气股份有限公司 | Diagnosis method, control device and system for wheel locking fault of high-speed train |
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| CN1738738A (en) * | 2002-11-18 | 2006-02-22 | 日本精工株式会社 | Axle unit with slip sensor and slip measurement method |
| CN102785648A (en) * | 2012-08-15 | 2012-11-21 | 奇瑞汽车股份有限公司 | Electromechanical brake system based on automobile bus and automobile |
| CN103619680A (en) * | 2011-06-20 | 2014-03-05 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Actuator system and operating method for an actuator system |
| CN104074217A (en) * | 2014-04-28 | 2014-10-01 | 三一重通机械有限公司 | Single-handle steering brake control system of bulldozer and bulldozer |
| CN204641623U (en) * | 2015-04-27 | 2015-09-16 | 深圳楼兰辉煌科技有限公司 | A kind of control system of the CO safety monitoring based on mobile unit |
| CN107839678A (en) * | 2016-08-29 | 2018-03-27 | 通用汽车环球科技运作有限责任公司 | Line control brake system |
| CN209870362U (en) * | 2019-02-03 | 2019-12-31 | 上海蔚来汽车有限公司 | Electronic parking system and vehicle comprising same |
-
2020
- 2020-03-11 CN CN202010164455.2A patent/CN111267804A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1738738A (en) * | 2002-11-18 | 2006-02-22 | 日本精工株式会社 | Axle unit with slip sensor and slip measurement method |
| CN103619680A (en) * | 2011-06-20 | 2014-03-05 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Actuator system and operating method for an actuator system |
| CN102785648A (en) * | 2012-08-15 | 2012-11-21 | 奇瑞汽车股份有限公司 | Electromechanical brake system based on automobile bus and automobile |
| CN104074217A (en) * | 2014-04-28 | 2014-10-01 | 三一重通机械有限公司 | Single-handle steering brake control system of bulldozer and bulldozer |
| CN204641623U (en) * | 2015-04-27 | 2015-09-16 | 深圳楼兰辉煌科技有限公司 | A kind of control system of the CO safety monitoring based on mobile unit |
| CN107839678A (en) * | 2016-08-29 | 2018-03-27 | 通用汽车环球科技运作有限责任公司 | Line control brake system |
| CN209870362U (en) * | 2019-02-03 | 2019-12-31 | 上海蔚来汽车有限公司 | Electronic parking system and vehicle comprising same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111776015A (en) * | 2020-07-28 | 2020-10-16 | 株洲中车时代电气股份有限公司 | Diagnosis method, control device and system for wheel locking fault of high-speed train |
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Application publication date: 20200612 |
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| RJ01 | Rejection of invention patent application after publication |