CN210554750U - Double-control double-redundancy EPB + P gear backup electric control unit control system - Google Patents
Double-control double-redundancy EPB + P gear backup electric control unit control system Download PDFInfo
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- CN210554750U CN210554750U CN201920794663.3U CN201920794663U CN210554750U CN 210554750 U CN210554750 U CN 210554750U CN 201920794663 U CN201920794663 U CN 201920794663U CN 210554750 U CN210554750 U CN 210554750U
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Abstract
The utility model discloses a two redundant EPB + P shelves of two accuses automatically controlled unit control system of backup. The plug-in is connected to an interface of the whole vehicle controller; the power conversion module is connected to the plug-in unit through a power line and a first CAN bus; the first MCU microcontroller and the second MCU microcontroller are connected with the plug-in unit through signal wires and connected with the power supply conversion module; the other one is connected to the plug-in unit through a power line, a P-gear control line, a signal line and a second CAN bus; the slope sensor is integrated in an electric control unit control system and is connected with a first MCU and a second MCU; the control system comprises a left motor driving circuit module, a right motor driving circuit module, a first MCU microcontroller and a second MCU microcontroller, wherein the output ends of the left motor driving circuit module and the right motor driving circuit module are respectively connected to a left motor and a right motor to control the left motor and the right motor to work. The utility model discloses an electric structural design of two redundant parking systems of two accuses can be used for realizing the two backups and the P shelves parking function backup of EPB function.
Description
Technical Field
The utility model relates to an electronic control unit module for among electric automobile parking braking system, be used for electric automobile EPB double backup and realize the electronic control unit module of P shelves parking backup specifically saying so, in order to perfect EPB functional safety and electric automobile P shelves parking function and the electronic control unit of the two microprocessors, two redundant circuits that design.
Background
With the increasing safety requirements of the automobile industry on the ISO26262 function, in order to meet the requirements on product reliability and safety, the development of dual-control dual-redundancy EPBs with safety redundancy is a trend, and meanwhile, for a vehicle without a P-gear mechanical parking function and a P-gear parking locking mechanism of an electric automobile, the requirements of GB21670 and ece 13H cannot be met, and the parking brake needs to be designed with P-gear redundancy.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the background art, realize the parking function of higher requirement, the utility model discloses a two redundant circuits of EPB + P shelves parking two accuse had both satisfied ISO26262 functional safety requirement, satisfied the electric motor car that does not have P shelves locking mechanism again and realized P shelves parking function, increased EPB parking system's reliability.
In order to solve the problems in the background art, the present invention is designed to describe the following points:
the utility model discloses the system has contained connector (signal input output interface), two independent CAN bus module (first CAN bus communication module, second CAN bus communication module), two independent high voltage change low voltage's power conversion module (one connects first MCU microcontroller, another second MCU microcontroller internal integration), first MCU microcontroller (MCU1), second MCU microcontroller (MCU2), left MOTOR drive circuit module (MOTOR Driver L), right MOTOR drive circuit module (MOTOR Driver R), executor about grade sensor and the EPB.
The method specifically comprises the following steps:
the plug-in is connected to an interface of the whole vehicle controller;
the power conversion module is connected to the plug-in unit through a power line and a first CAN bus;
the first MCU microcontroller is connected to the plug-in unit through a signal line and connected with the power supply conversion module;
the second MCU microcontroller is connected to the plug-in unit through a power line, a P-gear control line, a signal line and a second CAN bus and is also connected with the first MCU microcontroller;
the slope sensor is integrated in an electric control unit control system and is respectively connected with a first MCU (micro control unit) microcontroller and a second MCU microcontroller;
the left motor driving circuit module and the right motor driving circuit module are connected with a first MCU (microprogrammed control unit) and a second MCU respectively, and output ends of the left motor driving circuit module and the right motor driving circuit module are connected with a left motor and a right motor respectively to control the left motor and the right motor to work.
The first CAN bus is used for the first MCU microcontroller to communicate with the whole vehicle CAN bus, and the second CAN bus is used for the second MCU microcontroller to communicate with the whole vehicle CAN bus.
The first CAN bus is used for transmitting related signals such as vehicle speed, four wheel speeds, engine rotating speed, engine running state, engine torque, accelerator pedal position sum, gear position switches, clutch position state signals, a brake pedal, an EPB alarm lamp and the like.
The second CAN bus is used for transmitting speed, four wheel speeds, engine rotating speed, engine running state, engine torque, accelerator pedal position sum, gear position switches, clutch position state signals, brake pedals, EPB alarm lamps and other related signals.
And Signal lines between the first MCU microcontroller and the plug-in are respectively Signal lines of an EPB SWITCH Signal EPB _ SWITCH, an ignition Signal IGN, a BRAKE Signal BRAKE and a related Signal of the whole vehicle.
And signal lines between the second MCU microcontroller and the plug-in are respectively signal lines of an EPB SWITCH signal EPB _ SWITCH, an ignition signal IGN and a BRAKE signal BRAKE.
Plug-in components through two power cords (first power cord and second power cord) to power conversion module, power conversion module converts high voltage into low-voltage supply first MCU microcontroller, first MCU microcontroller receives EPB SWITCH Signal EPB SWITCH from the plug-in components input, ignition Signal IGN, BRAKE Signal BRAKE, whole car relevant Signal and the Signal that comes from the gradient sensor, handle output drive Signal control left motor drive circuit module and right motor drive circuit module through first MCU microcontroller, control left and right EPB motor through judging motor loop current.
The plug-in unit passes through another two power cords to the second MCU microcontroller, and the second MCU microcontroller receives EPB SWITCH signal EPB SWITCH, ignition signal IGN, BRAKE signal BRAKE, P fender signal and the signal from the slope sensor that follow plug-in unit input, handles output drive signal control left motor drive circuit module and right motor drive circuit module through first MCU microcontroller, controls left and right EPB motor through judging motor loop current.
The vehicle-related Signal refers to a clutch stroke sensor Signal and a gear Signal.
The first MCU microcontroller and the second MCU microcontroller are in direct communication with each other; under the condition that the first MCU microcontroller normally works, the second MCU microcontroller keeps dormant, and the first MCU microcontroller realizes the EPB function; when the first MCU microcontroller fails, the second MCU microcontroller realizes the EPB function, and if the MCU2 realizes that the related EPB parking function fails, the second MCU microcontroller realizes the P-gear parking; when the left and right motor driving circuit modules have single-side failure, the first MCU microcontroller realizes single-side parking; if the first MCU microcontroller fails, the single-side parking of the EPB is firstly realized through the second MCU microcontroller, and if the EPB related functions of the second MCU microcontroller fail, the P-gear single-side parking is realized through the second MCU microcontroller.
The power supply conversion module is a power supply module integrating a CAN transceiver, power supply conversion and awakening functions.
The second MCU microcontroller is a chip integrating power conversion, CAN transceiver and wake-up function.
The left motor driving circuit and the right motor driving circuit are modular circuits with motor fault detection and motor failure protection.
The utility model has the advantages that:
the utility model discloses can be used for realizing the double backup of parking braking system, be the double backup that realizes the EPB function on traditional EPB basis on the one hand, on the other hand is to not having P to keep off locking mechanism's electric motor car, has increased P and has kept off the parking, has improved car parking braking system's integrality, reliability, security, has reduced the accident because of the parking inefficacy arouses.
Drawings
FIG. 1 is a block diagram of the system structure of the present invention
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the utility model discloses an electronic controller module mainly comprises plug-in components, two way independent CAN bus communication module CAN1 and CAN2, EPB switching signal, P shelves button signal, whole car external signal, signal processing circuit, independent power conversion module, two MCU microcontroller MCU1 and MCU2, control motor drive circuit, control electron parking executor.
The specific implementation is shown in fig. 1, and comprises:
the plug-in unit comprises a plug-in unit 1, wherein the plug-in unit 1 is connected to an interface of the whole vehicle controller;
the power supply conversion module 2 is connected to the plug-in unit 1 through two power lines and a first CAN bus, wherein the power lines are used for supplying power, one is high level, and the other is low level;
the MCU comprises a first MCU microcontroller 3, which is connected to a plug-in 1 through four signal wires and is connected with a power supply conversion module 2;
the second MCU microcontroller 4 is connected to the plug-in 1 through two power lines, a P gear control line, three signal lines and a second CAN bus, and is simultaneously connected with the first MCU microcontroller 3, the power lines are used for supplying power, one high level and the other low level are used for transmitting a P gear button signal indicating whether the P gear is engaged or not;
the device comprises a gradient sensor 5, wherein the gradient sensor 5 is integrated in an electric control unit control system and is respectively connected with a first MCU (microprogrammed control unit) 3 and a second MCU 4;
the left motor driving circuit module 6 and the right motor driving circuit module 7 are included, the input ends of the left motor driving circuit module 6 and the right motor driving circuit module 7 are respectively connected with the first MCU microcontroller 3 and the second MCU microcontroller 4, and the output ends of the left motor driving circuit module 6 and the right motor driving circuit module 7 are respectively connected with a left motor and a right motor to control the left motor and the right motor to work.
The plug-in unit 1 is actually a plug-in strip, which is connected to an interface of the vehicle control unit.
The plug-in 1 is through two power cords (first power cord and second power cord) to power conversion module 2, power conversion module 2 converts the high voltage into low voltage and supplies first MCU microcontroller 3, first MCU microcontroller 3 receives EPB SWITCH Signal EPB SWITCH from plug-in 1 input, ignition Signal IGN, BRAKE Signal BRAKE, whole car relevant Signal and the Signal that comes from gradient sensor 5, handle output drive Signal control left motor drive circuit module 6 and right motor drive circuit module 7 through first MCU microcontroller 1, control left and right EPB motor through judging motor loop current. The plug-in 1 is connected to a second MCU microcontroller 4 through another two power lines (a first power line and a second power line), the second MCU microcontroller 4 receives an EPB SWITCH signal EPB SWITCH, an ignition signal IGN, a BRAKE signal BRAKE, a P shift signal and a signal from a gradient sensor 5 which are input from the plug-in 1, the first MCU microcontroller 2 processes and outputs a driving signal to control a left motor driving circuit module 6 and a right motor driving circuit module 7, and left and right EPB motors are controlled by judging the current of a motor loop.
The first MCU microcontroller 3 and the second MCU microcontroller 4 are in direct communication with each other; under the condition that the first MCU microcontroller 3 works normally, the second MCU microcontroller 4 keeps dormant, and the first MCU microcontroller 3 realizes the EPB function; when the first MCU microcontroller 3 fails, the second MCU microcontroller 4 realizes the EPB function, if the MCU2 realizes that the EPB Parking related function fails (for example, EPB switch fails, network input signals and hard line signals of the EPB related function fail), the second MCU microcontroller 4 realizes P Gear Parking, namely Parking Gear (park Gear), thereby realizing the dual redundancy work and P Gear backup function of the EPB function; when the left and right motor driving circuit modules 6 and 7 have unilateral failure, the first MCU 3 realizes unilateral parking; if the first MCU microcontroller 3 fails, the second MCU microcontroller 4 first realizes the unilateral parking of the EPB, and if the EPB related functions (such as EPB switch failure, EPB related function network input signals and hard line signals failure) of the second MCU microcontroller 4 fail, the second MCU microcontroller 4 realizes the unilateral parking of the P gear.
Because the battery receives factors such as interference of other high-power electrical apparatus, has caused heavy current, high pulse to the circuit impact influence in the whole car parking circuit, has caused the damage and the trouble of parking circuit, leads to component wherein or the inefficacy in the interim, and the parking function can't work, and passes through the utility model discloses a control system can stably realize the parking function, realizes the normal use of car, has avoided the accident to take place.
The failure conditions include: 1. the internal program operation fails, resulting in microcontroller reset; 2. when the temperature is too high, the components fail; 3. the EPB switch is blocked and the signal input of the whole vehicle fails; 4. the EMC environment of the whole vehicle exceeds the standard; 5. the CAN bus is interfered by other CAN nodes to cause data loss, CAN BUSOFF and the like.
The utility model discloses structural measure that EPB module became invalid contains:
1) the CAN bus controller is provided with two independent CAN networks, namely a first CAN bus (CAN1) and a second CAN bus (CAN2), when the CAN1 fails, the CAN2 CAN still independently communicate and work, and the whole vehicle control signals of the whole vehicle CAN bus CAN still be input into a second MCU microcontroller 4(MCU2) through the CAN 2.
2) Have two independent power conversion modules, respectively with whole car high voltage power conversion low-voltage, MCU1 is supplied power by independent power conversion module 2 chip, MCU2 is supplied power by self built-in power conversion module, when power conversion module 2 became invalid, receive voltage power supply from plug-in components 1 through MCU2 self built-in power module and give MCU2 self power supply, realize the EPB function through MCU 2.
3) The two MCU microcontrollers, namely the MCU1 and the MCU2 are provided, the MCU1 can process and complete all functions of the EPB under the condition of normal parking, and the MCU2 realizes all functions of the EPB or the P-gear parking function under the condition that the MCU1 fails.
The utility model discloses the working process who realizes as follows:
1. dual redundant operation of EPB functions:
under the normal mode, second MCU microcontroller 4(MCU2) is in the dormant mode, first MCU microcontroller 3 carries out Signal transmission with whole car CAN bus through first CAN bus (CAN1) this moment, the EPB switch, the ignition, the brake, brake pedal, whole car relevant Signal reserves as the supplementary, wait that whole car relevant Signal inputs first MCU microcontroller 3(MCU1) through the plug-in components interface, combine built-in slope sensor Signal value, handle through first MCU microcontroller 3(MCU1) and output control left and right motor Signal to drive circuit, drive motor executor about EPB through judging motor loop current.
Under the failure mode of the first MCU microcontroller 3(MCU1), namely when a certain module related to the first MCU microcontroller 3 fails (for example, the first CAN bus (CAN1) communication network fails, the power conversion module 2 fails or the first MCU microcontroller fails), the second MCU microcontroller 4(MCU2) which is backed up works to completely realize all functions of the EPB, obtain the EPB backup function and realize the dual redundancy design of the EPB function.
The second MCU microcontroller 4(MCU2) combines the EPB SWITCH signal EPB SWITCH, the ignition signal IGN, the BRAKE signal BRAKE, the signal from the gradient sensor (5) and the input signal of the second CAN bus to process and judge to obtain the control signal of the work of the EPB left and right motor actuators. The P-range signal is reserved as the control of the P-range backup function.
2. EPB drive circuit cross control design
The MCU1 can independently output and control the left and right motor driving circuit modules 6 and 7, and the MCU2 can also independently output and control the left and right motor driving circuit modules 6 and 7.
Under the normal mode, the MCU1 outputs and controls the left and right motor driving circuits, and under the condition that the MCU1 fails, the MCU2 outputs and controls the left and right motor driving circuits.
In specific implementation, when one-side motor driving circuit in the left and right motor driving circuits fails, the MCU1 outputs and controls the other-side motor driving circuit, so that the 8% gradient parking force parking requirement of the standard requirement is met. If the MCU1 fails, the output of the MCU2 controls the motor driving circuit on the other side.
Therefore, the technical scheme of the utility model under, motor about MCU1 and MCU2 can both independent output control, motor drive circuit about having realized MCU1 and MCU2 cross control has improved the reliability of EPB function.
3. P-gear parking backup function
When both the EPB function controlled by the MCU1 and the EPB backup function controlled by the MCU2 fail (including connector, external EPB parking switch, invalid CAN network input signal, single point failure of each module except the P-shift signal and the MCU2 in the electronic control unit of the EPB of fig. 1), the EPB has failed at this time, and the second MCU microcontroller 4(MCU2) retains the P-shift provided with the last backup to achieve parking: and in the case of a wheel speed signal, a P-gear parking signal is received (input through a P-gear switch or a P-gear touch screen panel button), and the vehicle is completely parked successfully through the P-gear parking backup function.
Claims (5)
1. A double-control double-redundancy EPB + P gear backup electric control unit control system is characterized in that:
the plug-in unit comprises a plug-in unit (1), wherein the plug-in unit (1) is connected to an interface of a whole vehicle controller;
the power supply conversion module (2) is connected to the plug-in (1) through a power line and a first CAN bus;
the power supply control circuit comprises a first MCU microcontroller (3) which is connected to a plug-in (1) through a signal line and is connected with a power supply conversion module (2);
the second MCU microcontroller (4) is connected to the plug-in (1) through a power line, a P-gear control line, a signal line and a second CAN bus and is connected with the first MCU microcontroller (3);
the device comprises a gradient sensor (5), wherein the gradient sensor (5) is integrated in an electric control unit control system and is respectively connected with a first MCU (3) and a second MCU (4);
the motor driving device comprises a left motor driving circuit module (6) and a right motor driving circuit module (7), wherein the input ends of the left motor driving circuit module (6) and the right motor driving circuit module (7) are respectively connected with a first MCU (micro control unit) microcontroller (3) and a second MCU microcontroller (4), and the output ends of the left motor driving circuit module (6) and the right motor driving circuit module (7) are respectively connected to a left motor and a right motor to control the left motor and the right motor to work.
2. The electric control unit control system for dual-control dual-redundancy EPB + P gear backup according to claim 1, characterized in that: and Signal lines between the first MCU microcontroller (3) and the plug-in (1) are respectively Signal lines of an EPB SWITCH Signal EPB _ SWITCH, an ignition Signal IGN, a BRAKE Signal BRAKE and a vehicle-related Signal.
3. The electric control unit control system for dual-control dual-redundancy EPB + P gear backup according to claim 1, characterized in that: and signal lines between the second MCU microcontroller (4) and the plug-in (1) are respectively signal lines of an EPB SWITCH signal EPB _ SWITCH, an ignition signal IGN and a BRAKE signal BRAKE.
4. The electric control unit control system for dual-control dual-redundancy EPB + P gear backup according to claim 2, characterized in that: the vehicle-related Signal refers to a clutch stroke sensor Signal and a gear Signal.
5. The electric control unit control system for dual-control dual-redundancy EPB + P-gear backup according to claim 3, characterized in that: the first MCU microcontroller (3) and the second MCU microcontroller (4) are in direct communication connection with each other.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281896A (en) * | 2019-05-29 | 2019-09-27 | 浙江亚太机电股份有限公司 | The electronic control unit control system of EPB+P grades of dual control dual redundant backups |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110281896A (en) * | 2019-05-29 | 2019-09-27 | 浙江亚太机电股份有限公司 | The electronic control unit control system of EPB+P grades of dual control dual redundant backups |
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