CN117184042B - Electronic car body stability control system and device integrated with EPB - Google Patents
Electronic car body stability control system and device integrated with EPB Download PDFInfo
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- CN117184042B CN117184042B CN202311453887.5A CN202311453887A CN117184042B CN 117184042 B CN117184042 B CN 117184042B CN 202311453887 A CN202311453887 A CN 202311453887A CN 117184042 B CN117184042 B CN 117184042B
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Abstract
The invention discloses an electronic vehicle body stability control system and device integrating EPB, comprising: the first system transmits signals to the second system through the synchronous interface; the first system integrates an EPB switch action signal identification module and a first EPB driving module, and the second system comprises a second EPB driving module; when the first EPB driving module or the second EPB driving module fails, fault information is transmitted to the second system or the first system through the synchronous interface, so that when any EPB driving module fails, the EPB driving module on the other side still has a parking braking function; according to the system, two EPB driving modules can be integrated effectively, two EPB driving module circuits are placed at the ESC end, the other EPB driving module circuits are controlled independently, the functional redundancy of the EPB is achieved, the first system and the second system are independent from each other and are checked with each other, the parking capacity required by the single-side failure of the EPB can be achieved, and the 8% parking slope requirement can be met.
Description
Technical Field
The invention relates to the field of automobile body attitude control and parking, in particular to an electronic automobile body stability control system and device integrated with an EPB.
Background
EPB (Electronic Park Brake) is an electronic parking brake control system for short, and has the main functions of static pull-up, static release, dynamic braking and the like. The system mainly comprises an ECU control module, a rear left actuator and a rear right actuator. The actuator comprises a motor, a transmission mechanism and a brake caliper. In order to cooperate with the system to realize the functions, the system comprises an EPB electronic switch, so that the parking braking intention of a driver can be identified.
ESC (Electronic Stability Control) is an electronic stability control system for short, and has the main functions of identifying the running state of the vehicle and the intention of a driver through a sensor, regulating the hydraulic pressure output by four wheel edges and realizing the control of the movement posture of the vehicle body. The system mainly comprises a wheel speed sensor, an ECU control module, an HCU hydraulic pressure control module, a hydraulic circuit and four brake actuators, namely front brake actuator, rear brake actuator, left brake actuator and right brake actuator.
In the prior ESC product and EPB redundancy design, an ESC module and an EPB module are independently powered, and two actuator driving modules in the EPB function and the ESC module are in the same shell and controlled by the same MCU (micro controller). The ESC module circuit and the EPB module circuit are distributed in two independent shells, are independently powered by two sets of wire bundles and are independently controlled by two MCU, and the ESC module is connected with the EPB module through the wire bundles.
Scheme one is the ESC integrated EPB scheme, which is most widely used at present, but has the following problems: the single-point failure caused by the power chip, the driving module or the MCU is easier to cause the function degradation of the two driving modules, so that the two actuator driving modules can not realize the pulling-up or releasing function, the requirement that the whole vehicle can still be kept parked on 8% of the ramp when one path of EPB driving fails can not be met, and the redundant control can not be realized. Scheme two is the scheme of ESC module and EPB module separate control, and this scheme needs to use two casings to install two circuit boards, also needs two sets of whole car pencil simultaneously, uses two sets of casings, two sets of circuit boards and relevant circuit and two sets of pencil, and the volume occupies greatly, and comprehensive cost is high.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an electronic stability control system and device for integrated EPB.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an EPB integrated electronic body stability control system comprising:
the first EPB driving module is integrated in the ESC module and forms a first system with the ESC module;
the second system is independent of the first system, comprises a second EPB driving module, and is used for transmitting signals through a synchronous interface;
when the first system detects an EPB switch action signal and the first EPB driving module is in failure, the first system transmits fault information to the second system through the synchronous interface, and the second system generates a corresponding control signal to control the pulling up or releasing of the caliper; or (b)
When the second system detects an EPB switch action signal and the second EPB driving module is in failure, the second system transmits fault information to the first system through the synchronous interface, and the first system generates a corresponding control signal to control the pulling-up or releasing of the caliper; and one path of independent two paths of power supply circuits supplies power for the ESC module and the first EPB driving module in the first system, and the other path of independent two paths of power supply circuits supplies power for the second EPB driving module in the second system.
As a further description of the above technical solution: the first system is connected with a first power supply circuit, the first system comprises a first protection circuit, the first power supply circuit is connected with the first protection circuit, the output end of the first protection circuit is connected with a switch, and the action of a driving module in the ESC module is controlled through the switch.
As a further description of the above technical solution: the first power supply circuit is also connected with a third protection circuit of the second system, the third protection circuit is connected with the second EPB driving module and the second SBC chip, and the second processor of the second system is powered through the second SBC chip.
As a further description of the above technical solution: the first system is further connected with a second power supply circuit, the first system further comprises a second protection circuit, the second power supply circuit is connected with the second protection circuit, the second protection circuit is connected with a first SBC chip and the driving module, the first SBC chip is connected with a first processor of the first system, and the driving module is powered by the second power supply circuit.
As a further description of the above technical solution: the driving module is connected with the second protection circuit through a solenoid valve, and the first processor is connected with a hydraulic pressure detection module, a wheel speed detection module, an input/output module, a communication module, a gyroscope detection module and a signal processing module.
As a further description of the above technical solution: the signal processing module is connected with the EPB switch module, and sends the EPB switch action signal to the first processor or the second processor through the EPB switch module, and generates a control signal to control the on state of the first EPB driving module or the second EPB driving module so as to control the pulling up or releasing of the calipers.
As a further description of the above technical solution: and an EPB switch action signal of the EPB switch module is sent to the first processor through the signal processing module, and the first processor generates a control signal according to signals of the hydraulic pressure detection module, the wheel speed detection module, the gyroscope detection module and the signal processing module and sends the control signal to the first EPB driving module.
As a further description of the above technical solution: the first EPB driving module and the second EPB driving module comprise an H-bridge circuit, and the other side of the H-bridge circuit is connected with a motor.
The electronic vehicle body stability control device integrated with the EPB is suitable for the system according to any one of the technical schemes, and comprises:
a housing;
a master control circuit board and a slave control circuit board are arranged on the inner side of the shell;
the shell body is connected with the main control circuit board through a PIN needle, the main control circuit board is connected with the auxiliary control circuit board through the PIN needle, and the connecting terminal of the shell body is connected with the vehicle control system to collect the whole vehicle signal for braking judgment.
As a further description of the above technical solution: the main control circuit board is connected with an ESC module functional component and a first EPB driving module, a first system is integrated, the slave control circuit board is connected with a second system functional component and a second EPB driving module, and the ESC module and the EPB driving module are integrated and arranged in a shell.
The technical scheme has the following advantages or beneficial effects:
1. can be effectual with two EPB drive modules integrate to place two EPB drive module circuit and integrate in the ESC module, another independent control realizes the functional redundancy of EPB, and first system and second system are mutually independent, and mutual check-up can realize the parking ability demand on 8% slope when the unilateral inefficacy of EPB.
2. By designing the two EPB drive modules separately and diagnosing each other, a design of a functional safety class ASIL D can be achieved.
3. The ESC module and the EPB driving module are integrated in one shell, so that the use of the shell can be effectively reduced, the material use cost is reduced, and the whole vehicle space is saved.
Drawings
FIG. 1 is a schematic diagram of a connection structure of an electronic stability control system according to the present invention;
FIG. 2 is an exploded view of the electronic stability control device according to the present invention;
legend description:
1. a synchronous interface; 2. a driving module; 3. a first EPB drive module; 4. a second EPB drive module; 5. a first protection circuit; 6. a switch; 7. a third protection circuit; 8. a second SBC chip; 9. a second processor; 10. a second protection circuit; 11. a first SBC chip; 12. a first processor; 13. a hydraulic pressure detection module; 14. a wheel speed detection module; 15. an input/output module; 16. a communication module; 17. a gyroscope detection module; 18. a signal processing module; 19. an EPB switch module; 20. a housing; 21. a main control circuit board; 22. and a slave control circuit board.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, one embodiment provided by the present invention: an EPB integrated electronic body stability control system comprising: the first EPB driving module 3, the first EPB driving module 3 is integrated in the ESC module and forms a first system with the ESC module;
the second system is independent from the first system, comprises a second EPB driving module 4, and performs signal transmission between the first system and the second system through a synchronous interface 1;
when the first system detects the EPB switch action signal and the first EPB driving module 3 is in failure, the first system transmits fault information to the second system through the synchronous interface 1, and the second system generates a corresponding control signal to control the pulling up or releasing of the caliper; or (b)
When the second system detects the EPB switch action signal and the second EPB driving module 4 is in failure, the second system transmits fault information to the first system through the synchronous interface 1, and the first system generates a corresponding control signal to control the pulling up or releasing of the caliper; and two independent power supply circuits, wherein one circuit supplies power to the ESC module and the first EPB driving module 3 in the first system and the other circuit supplies power to the second EPB driving module 4 in the second system.
In this embodiment, when the EPB module is started, the EPB switch module 19 sends an EPB switch action signal to the first system or the second system, the first system detects signals (such as hydraulic pressure signals, wheel speed signals, etc.) of sensors on the vehicle, determines the current state of the vehicle, and controls the first EPB driving module 3 to perform the action of pulling up or releasing the calipers through the first system, and meanwhile, the first system sends fault information to the second system through the synchronous interface 1, and the second system generates a corresponding control signal to control the second EPB driving module 4 to perform the same action of pulling up or releasing the calipers. When the first EPB driving module 3 cannot execute the pulling-up or releasing action of the calipers, the first EPB driving module 3 determines that the calipers are faulty, a detected sensor signal is sent to the second system through the synchronous interface 1, the fault signal is sent through the synchronous interface 1, the second EPB driving module 4 is controlled by the second system to realize the parking braking function, and similarly, when the second EPB driving module 4 fails, the second system sends the fault signal to the first system through the synchronous interface 1, the first system can still control the first EPB driving module 3 to realize the parking braking function, and the parking capacity required by the single-side failure of the EPB can be realized through the signal transmission between the first system and the second system, so that the 8% of parking slope requirement can still be met, and the design of the functional safety class ASIL D is achieved.
The first system is connected with a first power supply circuit, the first system comprises a first protection circuit 5, the first power supply circuit is connected with the first protection circuit 5, the output end of the first protection circuit 5 is connected with a switch 6, and the action of the driving module 2 in the ESC module is controlled through the switch 6.
In this embodiment, the first power supply circuit KL30-1 is powered by a storage battery, and the first protection circuit 5 is a power-region reverse connection prevention protection circuit in the first system, and is electrically controlled by the switch 6 to control the action state of the driving module 2.
The first power supply circuit is also connected with a third protection circuit 7 of the second system, the third protection circuit 7 is connected with the second EPB driving module 4 and the second SBC chip 8, and the second processor 9 of the second system is powered through the second SBC chip 8.
In this embodiment, the first power supply circuit is connected to the third protection circuit 7, where the third protection circuit 7 is an anti-reverse connection protection circuit in the second system, and the third protection circuit 7 supplies power to the second EPB driving module 4, the second SBC chip 8, and the second processor 9.
The first system is also connected with a second power supply circuit, the first system further comprises a second protection circuit 10, the second power supply circuit is connected with the second protection circuit 10, the second protection circuit 10 is connected with a first SBC chip 11 and a driving module 2, the first SBC chip 11 is connected with a first processor 12 of the first system, and the driving module 2 is powered by the second power supply circuit.
In this embodiment, the second power supply circuit KL30-2 is powered by DCDC, the second protection circuit 10 is a reverse connection preventing protection circuit for the non-power area in the first system, and the second protection circuit 10 is used to supply power to the first SBC chip 11, the first processor 12, the driving module 2 and the first EPB driving module 3.
Through the design, two EPB driving modules are respectively and independently powered, the first EPB driving module 3 is integrated at the first system end and is independently controlled by different processors, redundancy of EPB functions is achieved, the first system and the second system are mutually independent and mutually verified, and parking braking capability required by single-side EPB failure can be achieved.
An electromagnetic valve is further connected between the driving module 2 and the second protection circuit 10, and the first processor 12 is further connected with a hydraulic pressure detection module 13, a wheel speed detection module 14, an input and output module 15, a communication module 16, a gyroscope detection module 17 and a signal processing module 18;
the signal processing module 18 is connected to the EPB switch module 19, and sends an EPB switch action signal to the first processor 12 or the second processor 9 through the EPB switch module 19, and generates a control signal to control the on state of the first EPB driving module 3 or the second EPB driving module 4, so as to control the pulling up or releasing of the caliper.
In this embodiment, the hydraulic pressure detection module 13, the wheel speed detection module 14 and the gyroscope detection module 17 are used for monitoring the vehicle state, judging the current state of the vehicle according to the action signals of the first EPB driving module 3 or the second EPB driving module 4, controlling the lifting or releasing action of the calipers in the EPB driving module according to the operation instruction of the driver, sending the result of the control action to an external system (the operation control system of the whole vehicle) through the communication module 16, so as to be convenient for adjusting the vehicle according to the controlled working result, meanwhile, the first system also receives the EPB switch action signals sent by the EPB switch module 19, recognizes after being processed by the signal processing module 18, if the first EPB driving module 3 fails, the first processor 12 sends the processed EPB switch action signals to the second processor 9 through the synchronous interface 1, and the second processor 9 controls the second EPB driving module 4.
The EPB switch operation signal of the EPB switch module 19 is sent to the first processor 12 through the signal processing module 18, the first processor 12 generates a control signal according to the signals of the hydraulic pressure detection module 13, the wheel speed detection module 14, the gyroscope detection module 17 and the signal processing module 18 and sends the control signal to the first EPB driving module 3, and meanwhile, the first processor 12 sends the processed EPB switch operation signal to the second processor 9 through the synchronous interface 1, and the second processor 9 controls the second EPB driving module 4.
In this embodiment, after the EPB driving module is triggered, the EPB switching module 19 processes the EPB switching signals of the first EPB driving module 3 and the second EPB driving module 4 by the signal processor 18, and sends the processed signals to the first processor 12, and sends the control signals to the second processor 9 by the first processor 12 to control the two EPB driving modules.
The first EPB driving module 3 and the second EPB driving module 4 include an H-bridge circuit, and the other side of the H-bridge circuit is connected to a motor.
In this embodiment, the inside of the H-bridge circuit is 4N-MOS tubes for controlling the motion of the motor, a current sampling resistor is connected to one side of the H-bridge circuit for sampling the current for controlling the motor, so as to realize accurate control of the motor, and the motor is used for controlling the pulling up or releasing of the calipers to realize parking brake, setting the N-MOS tube in any diagonal direction to be conducted, the calipers to be pulled up, and the N-MOS tube in the other diagonal direction to be conducted, and releasing the calipers.
Referring to fig. 2, the present invention further provides an embodiment of an EPB integrated electronic vehicle body stability control device, where the device is applicable to any one of the systems in the above technical solutions, and includes: a housing 20; a main control circuit board 21 and a slave control circuit board 22 are arranged on the inner side of the shell 20; the shell 20 is connected with the main control circuit board 21 through a PIN needle, the main control circuit board 21 is connected with the slave control circuit board 22 through a PIN needle, and the connection terminal of the shell 20 is connected with a vehicle control system to collect a whole vehicle signal for braking judgment.
In this embodiment, two EPB driving modules are split, one of the two EPB driving modules is incorporated into an ESC module, and the two EPB driving modules are controlled by the ESC module and are used as the main control circuit board 21 after being incorporated. The other module is controlled by an independent circuit, and is used as a slave control circuit board 22, and the master control circuit board 21 and the slave control circuit board 22 are welded through PIN needles and uniformly welded in the shell 20, so that the use of the shell 20 can be effectively reduced, the material use cost is reduced, and meanwhile, the whole vehicle space is saved.
The main control circuit board 21 is connected with the functional parts of the ESC module and the first EPB driving module 3, integrates the first system, the slave control circuit board 22 is connected with the functional parts of the second system and the second EPB driving module 4, the ESC module and the EPB driving module are integrated and arranged in one shell 20, and the two EPB driving modules are separately designed and mutually diagnosed, so that the design of the functional safety level ASIL D can be achieved.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (6)
1. An EPB integrated electronic body stability control system, comprising:
a first EPB drive module (3), the first EPB drive module (3) being integrated in an ESC module and constituting a first system with the ESC module;
a second system independent from the first system, the second system comprising a second EPB drive module (4), the first system and the second system being in signal transmission via a synchronization interface (1);
when the first system detects an EPB switch action signal and the first EPB driving module (3) is in failure, the first system transmits fault information to the second system through the synchronous interface (1), and the second system generates a corresponding control signal to control the pulling up or releasing of the caliper; or alternatively, the first and second heat exchangers may be,
when the second system detects an EPB switch action signal and the second EPB driving module (4) is in failure, the second system transmits fault information to the first system through the synchronous interface (1), and the first system generates a corresponding control signal to control the pulling up or releasing of the caliper; two independent power supply circuits, wherein one circuit supplies power to an ESC module and a first EPB driving module (3) in the first system, and the other circuit supplies power to a second EPB driving module (4) in the second system;
the first system is also connected with a second power supply circuit, the first system further comprises a second protection circuit (10), the second power supply circuit is connected with the second protection circuit (10), the second protection circuit (10) is connected with a first SBC chip (11) and the driving module (2), the first SBC chip (11) is connected with a first processor (12) of the first system, and the driving module (2) is powered by the second power supply circuit;
an electromagnetic valve is further connected between the driving module (2) and the second protection circuit (10), and the first processor (12) is further connected with a hydraulic pressure detection module (13), a wheel speed detection module (14), an input/output module (15), a communication module (16), a gyroscope detection module (17) and a signal processing module (18);
the signal processing module (18) is connected with an EPB switch module (19), and sends the EPB switch action signal to the first processor (12) or the second processor (9) through the EPB switch module (19) to generate a control signal to control the conduction state of the first EPB driving module (3) or the second EPB driving module (4) so as to control the pulling-up or releasing of the calipers;
EPB switch action signals of the EPB switch module (19) are sent to the first processor (12) through the signal processing module (18), and the first processor (12) generates control signals according to signals of the hydraulic pressure detection module (13), the wheel speed detection module (14), the gyroscope detection module (17) and the signal processing module (18) and sends the control signals to the first EPB driving module (3), and meanwhile, the first processor (12) sends the control signals to the second EPB driving module (4) through the synchronous interface (1).
2. An EPB-integrated electronic vehicle body stability control system according to claim 1, wherein: the first system is connected with a first power supply circuit, the first system comprises a first protection circuit (5), the first power supply circuit is connected with the first protection circuit (5), the output end of the first protection circuit (5) is connected with a switch (6), and the action of a driving module (2) in the ESC module is controlled through the switch (6).
3. An EPB integrated electronic body stability control system according to claim 2, wherein: the first power supply circuit is also connected with a third protection circuit (7) of the second system, the third protection circuit (7) is connected with the second EPB driving module (4) and the second SBC chip (8), and the second SBC chip (8) is used for supplying power to a second processor (9) of the second system.
4. An EPB-integrated electronic vehicle body stability control system according to claim 1, wherein: the first EPB driving module (3) and the second EPB driving module (4) comprise an H-bridge circuit, and the other side of the H-bridge circuit is connected with a motor.
5. An EPB integrated electronic vehicle body stability control device, characterized in that said device is adapted to the system according to any one of the preceding claims 1-4, comprising:
a housing (20);
a main control circuit board (21) and a slave control circuit board (22) are arranged on the inner side of the shell (20);
the shell (20) is connected with the main control circuit board (21) through a PIN needle, the main control circuit board (21) is connected with the auxiliary control circuit board (22) through the PIN needle, and the shell (20) is connected with a vehicle control system through a wiring terminal to collect a whole vehicle signal for braking judgment.
6. The EPB-integrated electronic vehicle body stability control device of claim 5, wherein: the main control circuit board (21) is connected with an ESC module functional part and a first EPB driving module (3), a first system is integrated, the slave control circuit board (22) is connected with a second system functional part and a second EPB driving module (4), and the ESC module and the EPB driving module are integrated and arranged in a shell (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN117644846B (en) * | 2024-01-30 | 2024-05-03 | 千顾汽车科技(江苏)有限公司 | Hydraulic decoupling intelligent braking system and device |
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| KR20130034781A (en) * | 2011-09-29 | 2013-04-08 | 주식회사 만도 | Integrated electronic control system and method thereof |
| CN110203189A (en) * | 2019-05-05 | 2019-09-06 | 万向钱潮股份有限公司 | A kind of electrically driven (operated) commercial vehicle electronic parking system |
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