CN115923743A - Electronic parking brake system backup controller - Google Patents
Electronic parking brake system backup controller Download PDFInfo
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- CN115923743A CN115923743A CN202110966058.1A CN202110966058A CN115923743A CN 115923743 A CN115923743 A CN 115923743A CN 202110966058 A CN202110966058 A CN 202110966058A CN 115923743 A CN115923743 A CN 115923743A
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Abstract
The invention relates to a Backup Controller of an electronic Parking Brake system (BC-EPB), which is used for backing up basic functions of the electronic Parking Brake system (EPB). The method comprises the following steps: the vehicle signal detection device comprises a power management module, a communication module, a vehicle signal detection module, an MCU module, a motor drive module and a selection switch module. The BC-EPB can detect the EPB switch and/or the P gear signal, and the selection switch module selects whether to control the EPB motor. When the EPB controller works normally, the EPB controller can directly control the EPB motor through the selection switch module. When the EPB controller fails, the BC-EPB can take over to control the EPB motor, and the parking and releasing functions of the EPB are realized. Even if the BC-EPB fails, the EPB controller can still directly control the EPB motor through the selection switch module. By adopting the technical scheme, the basic function backup of the EPB controller can be realized, the P gear lock is replaced, the parking safety is ensured, and the cost of the whole vehicle is reduced.
Description
Technical Field
The invention relates to an electronic parking brake system of an automobile, in particular to a backup controller of the electronic parking brake system.
Background
The EPB system can be used to implement a temporary parking brake during driving and a long-term parking after parking, and the parking brake is implemented by an electronic control manner. Based on the EPB system, the functions of flameout automatic parking, door opening automatic parking, emergency braking, automatic function, hill starting and the like can be realized. All functions of the EPB system can be realized by the driver operating the EPB switch at the driving position.
The EPB system includes an EPB controller, an EPB switch, and a brake integrated with a motor reduction mechanism, wherein the brake integrated with the motor reduction mechanism includes a dc motor, a reduction mechanism, and a brake. The EPB controller analyzes whether the driver needs to park and release the EPB by detecting the signals of pulling up and pressing down the EPB switch by the driver, and further pushes the brake to clamp and release by controlling the positive rotation and the negative rotation of the motor so as to realize the parking and releasing functions of the EPB.
When the EPB controller fails, the EPB system cannot implement the park and release function. Therefore, for a vehicle using the EPB system, a P-gear lock system is generally required to be added, when a driver puts a gear into a P gear, the P-gear lock controller controls the P-gear lock mechanism to lock a gear, so that the EPB parking function can be realized, and the P-gear lock system can perform a function backup for the EPB system. However, the P-gear system is complex in structure and high in cost.
Disclosure of Invention
The invention provides a backup controller of an electronic parking brake system, which aims to realize the backup of the basic functions of an EPB controller, thereby replacing a P-gear lock system, ensuring the safety of parking redundancy and realizing the cost reduction of a whole vehicle.
The purpose of the invention can be realized by the following technical scheme:
an electronic parking brake system backup controller comprising:
the power supply management module is used for converting the power supply of the vehicle-mounted power supply into a power supply meeting the internal work requirement of the BC-EPB;
the communication module is connected to the vehicle-mounted communication local area network bus, and is used for realizing a data interaction function between the BC-EPB and the vehicle-mounted communication local area network bus to acquire vehicle state information;
the vehicle signal detection module is used for acquiring the EPB switch state and/or the P-gear signal of the vehicle;
the MCU module stores and runs a control program of the BC-EPB;
the motor driving module controls the driving of the EPB motor;
the selection switch module is used for realizing selection of EPB controller motor drive output or BC-EPB motor drive output; when the EPB controller works normally, the selection switch module enables the EPB controller to be connected with the EPB motor, so that the motor driving module of the BC-EPB is isolated from the EPB motor, and the EPB controller outputs motor driving current through the selection switch module of the BC-EPB to control the action of the EPB motor; when the EPB controller fails, the selection switch module enables the BC-EPB motor driving module to be connected with the EPB motor, so that the EPB controller is isolated from the EPB motor, and the BC-EPB motor driving module outputs motor driving current through the BC-EPB selection switch module to control the EPB motor to act;
the EPB controller can be integrated in an electronic stability control system ESC, an anti-lock brake system ABS, a brake-by-wire system BBW, an electric tailgate controller PBD or a vehicle control unit VCU of a vehicle body;
the electronic parking brake system backup controller BC-EPB can be integrated in an electronic stability control system ESC, an anti-lock brake system ABS, a brake-by-wire system BBW, an electric tail gate controller PBD or a vehicle control unit VCU of a vehicle body;
particularly, the motor driving module can be driven by two or more paths to drive two or more EPB motors;
particularly, the communication module CAN be CAN communication, LIN communication, CAN FD communication, flexRay communication or Ethernet, and the communication module CAN be one path, two paths or multiple paths;
particularly, the selection switch module can be realized by a relay or an MOS (metal oxide semiconductor) tube;
particularly, the vehicle signal detection module can directly acquire the vehicle EPB switch state and/or the P-gear signal through hard-line detection, and can also acquire the vehicle EPB switch state and/or the P-gear signal through a vehicle-mounted communication local area network bus;
in particular, the communication module can be used as a wake-up source of the BC-EPB.
Compared with the prior art, the invention has the following advantages:
(1) Redundant backup, safe and reliable: when the EPB controller is normal, the BC-EPB does not work. When the EPB controller fails, the BC-EPB can disconnect the output of the EPB controller, realize the control of the EPB motor and realize the parking and release of the whole vehicle. Even if BC-EPB fails, the EPB controller can still directly control the EPB motor through the selection switch module. The safety requirement of the whole vehicle function is met, and the backup of the EPB function is realized;
(2) Save whole car parts, realize that whole car falls originally: the scheme realizes the backup of the EPB controller, and by adopting the scheme, the P gear locking mechanism can be cancelled, so that the parts are saved, and the cost reduction of the whole vehicle is realized.
Drawings
Fig. 1 is a schematic diagram of a backup controller of an electronic parking brake system controlling a single-way motor according to the present embodiment, and fig. 2 is a schematic diagram of a backup controller of an electronic parking brake system controlling two-way motors according to the present embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example one
As shown in fig. 1, an electronic parking brake system backup controller includes: the vehicle signal detection system comprises a power management module 2-1, a communication module 2-2, a vehicle signal detection module 2-3, an MCU module 2-4, a motor drive module 2-5 and a selection switch module 2-6.
The battery 1-1 in the vehicle-mounted component 1 supplies the BC-EPB 2 and the EPB controller 3 with the required electric power. BC-EPB 2 is connected with vehicle communication local area network bus through communication module 2-2, EPB controller 4 is also connected with vehicle communication local area network bus, realizes mutual signal interaction. And acquiring the gear signal 1-2 and the state of the EPB switch 1-3 through the vehicle signal acquisition module 2-3. The MCU module 2-4 controls the motor driving module 2-5 and the selection switch module 2-6 according to vehicle signals, so that the EPB motor 3 is controlled, and the motor is controlled to rotate forwards and backwards to park and release the EPB.
Under the condition that the EPB controller 4 works normally, the BC-EPB 2 obtains a normal working signal of the EPB controller 2 through a vehicle-mounted communication local area network, the selection switch modules 2-6 are not controlled, the EPB controller 4 is directly connected with the EPB motor 3 through the selection switch modules 2-6 and outputs motor driving current to the EPB motor 3, and the EPB controller 4 controls the EPB motor 3 to rotate forwards and backwards so as to realize the parking and releasing of the EPB.
When the EPB controller 4 malfunctions, the EPB controller 4 cannot implement the parking and release functions of the EPB. BC-EPB 2 obtains EPB controller fault signals through a vehicle-mounted communication local area network, and obtains gear 1-2 signals and/or EPB switch 1-3 states through a vehicle signal detection module 2-3. The BC-EPB control selection switch module 2-5 is directly connected with the motor drive module 2-5, motor drive current is output to the EPB motor 3, and the BC-EPB 2 controls the forward rotation and the reverse rotation of the EPB motor 3, so that the parking and the release of the EPB are realized.
Even if the BC-EPB 2 fails, the BC-EPB 2 does not work and the selection switch module 2-6 is not controlled, the selection switch module 2-6 can still be directly connected with the EPB controller 4 to output to the EPB motor 3, the EPB controller 4 realizes the parking and releasing of the EPB, and the EPB function can still be completely realized.
Example two
As shown in fig. 2, an electronic parking brake system backup controller includes: the vehicle signal detection system comprises a power management module 2-1, a communication module 2-2, a vehicle signal detection module 2-3, an MCU module 2-4, a motor drive module a 2-7, a selection switch module a2-10, a motor drive module b 2-8 and a selection switch module b 2-9.
The battery 1-1 in the vehicle-mounted component 1 supplies the BC-EPB 2 and the EPB controller 3 with the required electric power. BC-EPB 2 is connected with vehicle communication local area network bus through communication module 2-2, EPB controller 4 is also connected with vehicle communication local area network bus, realizes mutual signal interaction. And acquiring the gear signal 1-2 and the state of the EPB switch 1-3 through the vehicle signal acquisition module 2-3. The MCU module 2-4 controls the motor driving module a 2-7, the motor driving module b 2-8, the selection switch module a2-10 and the selection switch module b 2-9 according to vehicle signals, so that the control of two paths of EPB motors, namely an EPB motor a 5 and an EPB motor b6, is realized, and the clamping and the release of the two brakes are realized by controlling the forward rotation and the reverse rotation of the two motors.
Under the condition that the EPB controller 4 works normally, the BC-EPB 2 obtains a normal working signal of the EPB controller 2 through a vehicle-mounted communication local area network, the selection switch modules a2-10 and the selection switch modules b 2-9 are not controlled, the EPB controller 4 is directly connected with the EPB motor a 5 and the EPB motor b6 through the selection switch modules a2-10 and the selection switch modules b 2-9 and outputs motor driving current to the EPB motor, and the EPB controller 4 controls the EPB motor to rotate forwards and backwards to park and release EPB.
When the EPB controller 4 malfunctions, the EPB controller 4 cannot implement the parking and release functions of the EPB. BC-EPB 2 obtains EPB controller fault signals through a vehicle-mounted communication local area network, and obtains gear 1-2 signals and/or states of EPB switches 1-3 through a vehicle signal detection module 2-3. The BC-EPB control selection switch module a2-10 and the selection switch module b 2-9 are directly connected with the motor driving module a 2-7 and the motor driving module b 2-8, motor driving current is output to the EPB motor a 5 and the EPB motor b6, the BC-EPB 2 controls the forward rotation and the reverse rotation of the EPB motor a 5 and the EPB motor b6, and the parking and the releasing of the EPB are realized.
Even if the BC-EPB 2 fails, the BC-EPB 2 does not work, the selection switch modules a2-10 and the selection switch modules b 2-9 are not controlled, the selection switch modules a2-10 and the selection switch modules b 2-9 can still be directly connected with the EPB controller 4 to output to the EPB motor a 5 and the EPB motor b6, the EPB controller 4 realizes the parking and releasing of the EPB, and the EPB function can still be completely realized.
Claims (8)
1. An electronic parking brake system backup controller, comprising:
the power management module (2-1) is used for converting the power supply of the vehicle-mounted power supply into a power supply meeting the internal work requirement of the BC-EPB;
the communication module (2-2) is connected to the vehicle-mounted communication local area network bus to realize the data interaction function between the BC-EPB and the vehicle-mounted communication local area network bus to acquire the vehicle state information;
the vehicle signal detection module (2-3) is used for realizing acquisition of an EPB switch state and/or a P gear signal of the vehicle;
the MCU module (2-4) stores and runs a BC-EPB control program;
a motor driving module (2-5) for controlling the driving of the EPB motor;
the selection switch module (2-6) is used for realizing selection of EPB controller motor drive output or BC-EPB motor drive output; when the EPB controller works normally, the selection switch module (2-6) enables the EPB controller to be connected with the EPB motor, the motor driving module (2-5) of the BC-EPB is isolated from the EPB motor, and the EHB controller outputs motor driving current through the selection switch module (2-6) of the BC-EPB to control the action of the EPB motor; when the EPB controller is in fault, the selection switch module (2-6) enables the motor driving module of the BC-EPB to be connected with the EPB motor, so that the EPB controller is isolated from the EPB motor, and the motor driving module of the BC-EPB outputs motor driving current through the selection switch module of the BC-EPB to control the action of the EPB motor.
2. The electronic parking brake system backup controller according to claim 1, wherein the EPB controller is integrated in an electronic stability control system ESC, an anti-lock brake system ABS, a brake-by-wire system BBW, an electric tail gate controller PBD, or a vehicle control unit VCU.
3. The electronic parking brake system backup controller according to claim 1, wherein the electronic parking brake system backup controller BC-EPB may be integrated into a vehicle body electronic stability control system ESC, an anti-lock brake system ABS, a brake-by-wire system BBW, an electric tail gate controller PBD, or a vehicle control unit VCU.
4. The electronic parking brake system backup controller according to claim 1, characterized in that the motor driving module (2-5) can be two-way or multi-way driving, and realizes driving of two or more EPB motors.
5. The electronic parking brake system backup controller according to claim 1, characterized in that the communication module (2-2) CAN be CAN communication, LIN communication, CAN FD communication, flexRay communication or ethernet, and the communication module CAN be one-way, two-way or multi-way.
6. The electronic parking brake system backup controller according to claim 1, characterized in that the selection switch module (2-6) can be realized by a relay or a MOS transistor.
7. The electronic parking brake system backup controller according to claim 1, wherein the vehicle signal detection module (2-3) can directly obtain the vehicle EPB switch status and/or the P-range signal through hard-line detection, and can also obtain the vehicle EPB switch status and/or the P-range signal through a vehicle communication local area network bus.
8. The electronic parking brake system backup controller according to claim 1, characterized in that the communication module (2-2) may be used as a wake-up source for BC-EPB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966058.1A CN115923743A (en) | 2021-08-24 | 2021-08-24 | Electronic parking brake system backup controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110966058.1A CN115923743A (en) | 2021-08-24 | 2021-08-24 | Electronic parking brake system backup controller |
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| CN115923743A true CN115923743A (en) | 2023-04-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117184042A (en) * | 2023-11-03 | 2023-12-08 | 千顾汽车科技(江苏)有限公司 | Electronic car body stability control system and device integrated with EPB |
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2021
- 2021-08-24 CN CN202110966058.1A patent/CN115923743A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117184042A (en) * | 2023-11-03 | 2023-12-08 | 千顾汽车科技(江苏)有限公司 | Electronic car body stability control system and device integrated with EPB |
| CN117184042B (en) * | 2023-11-03 | 2024-01-23 | 千顾汽车科技(江苏)有限公司 | Electronic car body stability control system and device integrated with EPB |
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