CN116424291A - Wire control brake device with safety redundancy and use method - Google Patents
Wire control brake device with safety redundancy and use method Download PDFInfo
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- CN116424291A CN116424291A CN202310565641.0A CN202310565641A CN116424291A CN 116424291 A CN116424291 A CN 116424291A CN 202310565641 A CN202310565641 A CN 202310565641A CN 116424291 A CN116424291 A CN 116424291A
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- 230000005540 biological transmission Effects 0.000 claims description 31
- 230000007246 mechanism Effects 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000003745 diagnosis Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- 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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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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
- B60T13/745—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 acting on a hydraulic system, e.g. a master cylinder
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/82—Brake-by-Wire, EHB
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a wire control brake device with safety redundancy and a use method thereof, comprising the following steps: the hydraulic control system comprises a first set of electric cylinder units, a second set of electric cylinder units, an oilcan, a central control unit, a hydraulic control unit and wheel cylinders; the first set of electric cylinder units are connected with the oil pot and the hydraulic control unit, the second set of electric cylinder units are connected with the oil pot and the hydraulic control unit, and the hydraulic control unit is connected with the wheel cylinder; the central control unit is connected with the first set of electric cylinder units, the second set of electric cylinder units, the oilcan and the hydraulic control unit. The application provides a braking system of an unmanned tool vehicle, when a main braking system is partially failed or is totally failed or the braking force is insufficient, a standby braking system is started immediately, and braking is completed independently or cooperatively, so that the possible reliability problem and potential safety hazard of the unmanned tool vehicle are solved.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a brake-by-wire device with safety redundancy and a use method thereof.
Background
With the gradual development of the vehicle braking system to electric drive-by-wire, the electro-hydraulic drive-by-wire braking system is also attracting more attention, and meanwhile, due to the development of the internet of vehicles and automatic driving, unmanned tool vehicles are applied to the ground of logistics, sanitation, factories, mining areas, ports, airports and the like in a dispute manner so as to realize the effect improvement of personnel reduction.
At present, in order to solve the possible reliability problem and potential safety hazard of the unmanned tool vehicle, two independent wire control braking systems are usually required to be carried, are redundant, ensure effective braking, have higher material cost and operation cost, and provide a wire control braking system with lower cost while ensuring safety.
The brake-by-wire system as described in patent document CN108082157a includes a controller, a brake assembly, a pedal assembly, and a hydraulic backup assembly. The brake assembly includes a brake and an actuator that is connected to the brake when the system is in the normal mode. The pedal assembly is coupled to the brake when the system is in the standby mode and to the controller when in the normal mode. The controller receives a brake signal from the pedal assembly and outputs a command signal to the actuator. The actuator drives the brake in a normal mode. The backup assembly includes a hydraulic line in controlled fluid communication with the brake and pedal assembly. The valve is in a normal position and a stand-by position, isolating the pedal assembly from the brake when in the normal mode, and providing communication between the pedal assembly and the brake when in the stand-by mode. The patent adopts two sets of independent parallel linear control actuating systems, and comprises structures such as pedal components and the like, and the cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a wire control and actuation device with safety redundancy and a use method thereof.
According to the present invention, there is provided a brake-by-wire apparatus with safety redundancy, comprising: the hydraulic control system comprises a first set of electric cylinder units, a second set of electric cylinder units, an oilcan, a central control unit, a hydraulic control unit and wheel cylinders;
the first set of electric cylinder units are connected with the oil pot and the hydraulic control unit, the second set of electric cylinder units are connected with the oil pot and the hydraulic control unit, and the hydraulic control unit is connected with the wheel cylinder;
the central control unit is connected with the first set of electric cylinder units, the second set of electric cylinder units, the oilcan and the hydraulic control unit.
Preferably, the first set of electric cylinder units comprises: the first servo motor, the first transmission mechanism, the first electric cylinder piston, the first electric cylinder cavity and the first electric cylinder compensation hole;
the first electric cylinder piston is arranged in the first electric cylinder cavity, and the first servo motor is connected with the first electric cylinder piston in a transmission way through the first transmission mechanism;
the first electric cylinder cavity is communicated with the oilcan through the first electric cylinder compensation hole and the hydraulic pipeline, and the first electric cylinder cavity is connected with the hydraulic control unit.
Preferably, the second set of electric cylinder units comprises: the second servo motor, the second transmission mechanism, the second electric cylinder piston, the second electric cylinder cavity and the second electric cylinder compensation hole;
the second electric cylinder piston is arranged in the second electric cylinder cavity, and the second servo motor is connected with the second electric cylinder piston in a transmission way through the second transmission mechanism;
the second electric cylinder cavity is communicated with the oilcan through the second electric cylinder compensation hole and the hydraulic pipeline, and the second electric cylinder cavity is connected with the hydraulic control unit.
Preferably, the oilcan comprises: the first oil pot cavity, the second oil pot cavity and the liquid level sensor;
the first oilcan cavity is connected with the first set of electric cylinder units through an oil duct, and the second oilcan cavity is connected with the second set of electric cylinder units through an oil duct;
the liquid level sensor is arranged in the oil pot.
Preferably, the central control unit comprises: first control hardware and second control hardware;
the first control hardware and the second control hardware are independently provided with a power supply and a communication line and are mutually redundant.
Preferably, one end of the first pressure sensor is connected with the first electric cylinder cavity, and the other end of the first pressure sensor is connected with the central control unit;
one end of the first rotor position sensor is connected with the first servo motor, and the other end of the first rotor position sensor is connected with the central control unit;
one end of the second pressure sensor is connected with the second electric cylinder cavity, and the other end of the second pressure sensor is connected with the central control unit;
one end of the second rotor position sensor is connected with the second servo motor, and the other end of the second rotor position sensor is connected with the central control unit.
Preferably, the central control unit is connected with the first servo motor and the second servo motor.
Preferably, the central control unit is connected with the automatic driving controller, the electric driving controller and the vehicle-mounted internet of things unit.
Preferably, the hydraulic control unit includes: the first two-position two-way valve, the second two-position two-way valve, the third two-position two-way valve and the fourth two-position two-way valve;
the first two-position two-way valve, the second two-position two-way valve, the third two-position two-way valve and the fourth two-position two-way valve are connected with the central control unit and the wheel cylinder.
Preferably, a method for using the brake-by-wire device with safety redundancy comprises the following steps:
step S1, receiving an active braking request: the automatic driving controller recognizes the working condition of braking by the peripheral camera, radar or navigation positioning information and transmits braking request information to the central control unit;
step S2, the first set of braking units build pressure: the central control unit starts the first servo motor according to the braking requirement and drives the first electric cylinder piston to build pressure in the first electric cylinder cavity through the first transmission mechanism;
step S3, opening an electromagnetic valve to conduct an oil way: the central control unit opens the first two-position two-way valve and the second two-position two-way valve, and the hydraulic control unit conducts the wheel cylinders through a hydraulic pipeline to realize vehicle braking;
step S4, pressure control and energy recovery: the central control unit sends an energy recovery request to the electric drive controller, and the electric drive controller cuts off the drive motor and starts a charging mode;
the central control unit readjusts the first servo motor according to the feedback of the electric drive controller and the deceleration condition of the vehicle to complete pressure closed-loop control;
step S5, the second set of braking units build pressure: when the first set of electric cylinder units fail or the pressure build-up is insufficient, the central control unit starts the second servo motor according to the braking requirement and drives the second electric cylinder piston to build pressure in the second electric cylinder cavity through the second transmission mechanism;
meanwhile, the central control unit sends a fault diagnosis result to a cloud operation and maintenance control center through the vehicle-mounted Internet of things unit so as to facilitate vehicle unfolding fault rescue;
step S6, opening an electromagnetic valve to conduct an oil way: the central control unit opens the third two-position two-way valve and the fourth two-position two-way valve, and the hydraulic control unit conducts the wheel cylinder system through a hydraulic pipeline to realize vehicle braking.
Compared with the prior art, the invention has the following beneficial effects:
(1) The application provides a braking system of an unmanned tool vehicle, when a main braking system is partially failed or is totally failed or the braking force is insufficient, a standby braking system is started immediately, and braking is completed independently or cooperatively, so that the possible reliability problem and potential safety hazard of the unmanned tool vehicle are solved.
(2) The manual cylinder unit, the pedal simulation unit and the like are not needed, so that the structure is simpler, and the cost is lower.
(3) The control system safety redundancy is realized, the central control unit comprises two sets of independent control hardware, and the central control unit is connected with the automatic driving controller, the electric driving controller and the vehicle-mounted Internet of things unit, so that active braking, collaborative braking, energy recovery, system detection and safety redundancy can be realized.
(4) The system has the advantages that the safety redundancy of the execution system is realized, two sets of execution systems are integrated, the two execution systems are mutually backed up, the first set of electric cylinder units and the second set of electric cylinder units are connected in parallel through four two-position two-way valves, the system is compared with the existing two sets of independent braking systems which are connected in parallel, the integration level is higher, the reliability of the system is improved, the braking response time and the braking distance are shortened, and the loading arrangement and the maintenance are more convenient.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a brake-by-wire apparatus;
the figure shows:
the hydraulic control system comprises a first set of electric cylinder units 1, a first servo motor 10, a first transmission mechanism 11, a first electric cylinder piston 12, a first electric cylinder cavity 13, a first electric cylinder compensation hole 14, a first pressure sensor 15, a first rotor position sensor 16, a second set of electric cylinder units 2, a second servo motor 21, a second transmission mechanism 22, a second electric cylinder piston 23, a second electric cylinder cavity 24, a second electric cylinder compensation hole 25, a second pressure sensor 26, a second rotor position sensor 27, an oil can 3, a first oil can cavity 28, a second oil can cavity 29, a liquid level sensor 30, a central control unit 4, first control hardware 31, second control hardware 32, a hydraulic control unit 5, a first two-way valve 17, a second two-way valve 18, a third two-way valve 19, a fourth two-way valve 20, 6, an automatic driving controller 7, an electric driving controller 8 and an on-board Internet of-things unit 9.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment includes: a first set of electric cylinder units 1, a second set of electric cylinder units 2, an oilcan 3, a central control unit 4, a hydraulic control unit 5 and wheel cylinders 6; the first set of electric cylinder units 1 are connected with the oilcan 3 and the hydraulic control unit 5, the second set of electric cylinder units 2 are connected with the oilcan 3 and the hydraulic control unit 5, and the hydraulic control unit 5 is connected with the wheel cylinder 6; the central control unit 4 is connected with the first set of electric cylinder units 1, the second set of electric cylinder units 2, the oilcan 3 and the hydraulic control unit 5.
The first set of electric cylinder units 1 includes: a first servo motor 10, a first transmission mechanism 11, a first electric cylinder piston 12, a first electric cylinder cavity 13, and a first electric cylinder compensation hole 14; the first electric cylinder piston 12 is arranged in the first electric cylinder cavity 13, and the first servo motor 10 is connected with the first electric cylinder piston 12 in a transmission way through the first transmission mechanism 11; the first electric cylinder cavity 13 is communicated with the oilcan 3 through the first electric cylinder compensation hole 14 and the hydraulic pipeline, and the first electric cylinder cavity 13 is connected with the hydraulic control unit 5.
The second set of electric cylinder units 2 includes: a second servo motor 21, a second transmission mechanism 22, a second electric cylinder piston 23, a second electric cylinder cavity 24, and a second electric cylinder compensation hole 25; the second electric cylinder piston 23 is arranged in the second electric cylinder cavity 24, and the second servo motor 21 is connected with the second electric cylinder piston 23 in a transmission way through the second transmission mechanism 22; the second electric cylinder cavity 24 is communicated with the oilcan 3 through a second electric cylinder compensation hole 25 and a hydraulic pipeline, and the second electric cylinder cavity 24 is connected with the hydraulic control unit 5.
The oilcan 3 includes: a first oilcan cavity 28, a second oilcan cavity 29, and a liquid level sensor 30; the first oilcan cavity 28 is connected with the first set of electric cylinder units 1 through an oil duct, the second oilcan cavity 29 is connected with the second set of electric cylinder units 2 through an oil duct, and a liquid level sensor 30 is arranged inside the oilcan 3.
The central control unit 4 includes: first control hardware 31 and second control hardware 32; the first control hardware 31 and the second control hardware 32 are independently provided with power and communication lines. One end of the first pressure sensor 15 is connected with the first electric cylinder cavity 13, the other end is connected with the central control unit 4, one end of the first rotor position sensor 16 is connected with the first servo motor 10, the other end is connected with the central control unit 4, one end of the second pressure sensor 26 is connected with the second electric cylinder cavity 24, the other end is connected with the central control unit 4, one end of the second rotor position sensor 27 is connected with the second servo motor 21, and the other end is connected with the central control unit 4. The central control unit 4 is connected with the first servo motor 10 and the second servo motor 21, and the central control unit 4 is connected with the automatic driving controller 7, the electric driving controller 8 and the vehicle-mounted internet of things unit 9.
The hydraulic control unit 5 includes: a first two-position two-way valve 17, a second two-position two-way valve 18, a third two-position two-way valve 19, and a fourth two-position two-way valve 20; the first two-way valve 17, the second two-way valve 18, the third two-way valve 19, and the fourth two-way valve 20 connect the central control unit 4 and the wheel cylinders 6.
Example 2
Example 2 is a preferred example of example 1.
As shown in fig. 1, the present embodiment includes: a first set of electric cylinder units 1, a second set of electric cylinder units 2, an oilcan 3, a central control unit 4, a hydraulic control unit 5 and wheel cylinders 6.
The first set of electric cylinder units 1 includes: a first servo motor 10, a first transmission mechanism 11, a first electric cylinder piston 12, a first electric cylinder chamber 13, a first electric cylinder compensation hole 14, a first pressure sensor 15, and a first rotor position sensor 16; the first electric cylinder piston 12 is arranged in the first electric cylinder cavity 13, and the first servo motor 10 is connected with the first electric cylinder piston 12 through the first transmission mechanism 11; the first electric cylinder compensation hole 14 is communicated with the first electric cylinder cavity 13, and the first electric cylinder compensation hole 14 is communicated with the oilcan 3 through a corresponding hydraulic pipeline; the first electric cylinder cavity 13 is communicated with the hydraulic control unit 5; the hydraulic control unit 5 is connected with the wheel cylinder system 6 through a first two-position two-way valve 17, a second two-position two-way valve 18 and corresponding hydraulic pipelines respectively. The first pressure sensor 15 in the first set of electric cylinder units 1 is used for measuring the pressure of the first electric cylinder cavity 13 and transmitting the pressure to the central control unit 4 to form pressure closed-loop control. The first rotor position sensor 16 is used for measuring the rotor angle of the first servo motor 10 and is transmitted to the central control unit 4 to form a closed loop control of the rotor position of the first servo motor 10.
The second set of electric cylinder units 2 includes: a second servo motor 21, a second transmission mechanism 22, a second electric cylinder piston 23, a second electric cylinder chamber 24, a second electric cylinder compensation hole 25, a second pressure sensor 26, and a second rotor position sensor 27; the second electric cylinder piston 23 is arranged in the second electric cylinder cavity 24, and the second servo motor 21 is connected with the second electric cylinder piston 23 in a transmission way through the second transmission mechanism 22; the second electric cylinder compensation hole 25 is communicated with the second electric cylinder cavity 24, and the second electric cylinder compensation hole 25 is communicated with the oilcan 3 through a corresponding hydraulic pipeline; the second electric cylinder cavity 24 is communicated with the hydraulic control unit 5; the hydraulic control unit 5 is connected with the wheel cylinder 6 through a third two-position two-way valve 19, a fourth two-position two-way valve 20 and corresponding hydraulic pipelines respectively. The second pressure sensor 26 in the second set of electric cylinder units 2 is used for measuring the pressure of the second electric cylinder cavity 24 and transmitting the pressure to the central control unit 4 to form a pressure closed loop control. The second rotor position sensor 27 is used for measuring the rotor angle of the second servo motor 21 and is transmitted to the central control unit 4 to form a closed loop control of the rotor position of the second servo motor 21.
The interior of the oil pot 3 is divided into a first oil pot cavity 28 and a second oil pot cavity 29; the first oilcan cavity 28 is directly connected with the first set of electric cylinder units 1 through an oil duct; the second oilcan cavity 29 is directly connected with the second set of electric cylinder units 2 through an oil duct. A liquid level sensor 30 is arranged in the oil pot 3 and is used for detecting the liquid level in the oil pot 3.
The central control unit 4 comprises two separate sets of control hardware: the first control hardware 31 and the second control hardware 32 are provided with two sets of power supply and communication lines, which are redundant to each other. The central control unit 4 is respectively connected with the first servo motor 10 of the first set of electric cylinder units 1 and the second servo motor 21 of the second set of electric cylinder units 2, and controls the position ring, the current ring and the pressure ring of the two servo motors.
The central control unit 4 is connected to the autopilot controller 7 and receives and responds to active braking requests of the vehicle. The central control unit 4 is connected with an electric drive controller 8 to realize dynamic control and energy recovery of the vehicle. The central control unit 4 is connected with the vehicle-mounted Internet of things unit 9, and system detection, fault rescue and software upgrading of the vehicle by the cloud operation and maintenance control center are achieved.
The hydraulic control unit 5 comprises a first two-position two-way valve 17, a second two-position two-way valve 18, a third two-position two-way valve 19, a fourth two-position two-way valve 20 and corresponding oil paths, and the central control unit 4 controls the opening and closing of the first two-position two-way valve 17, the second two-position two-way valve 18, the third two-position two-way valve 19 and the fourth two-position two-way valve 20 to conduct or block the oil paths of the first set of electric cylinder unit 1 or the second set of electric cylinder unit 2.
The hydraulic control unit 5 is linked with four wheel cylinders 6, outputs or inputs brake oil, and realizes the linear control of the vehicle.
The application method of the embodiment specifically comprises the following steps:
step one, receiving an active braking request: the automatic driving controller 7 recognizes the working condition of braking by the peripheral camera, radar or navigation positioning information and gives braking request information to the central control unit 4;
step two, the first set of braking unit builds pressure: the central control unit 4 starts a first servo motor 10 of the first set of electric cylinder units 1 according to the braking requirement, is connected with a first electric cylinder piston 12 through a first transmission mechanism 11, and builds pressure in a first electric cylinder cavity 13;
step three, opening an electromagnetic valve to conduct an oil way: the central control unit 4 opens the first two-position two-way valve 17 and the second two-position two-way valve 18, and the hydraulic control unit 5 conducts the wheel cylinder 6 system through a hydraulic pipeline to realize vehicle braking;
step four, pressure control and energy recovery: the central control unit 4 sends an energy recovery request to the electric drive controller 8, the electric drive controller 8 switches off the drive motor and starts the charging mode. The central control unit 4 readjusts the first servo motor 10 of the first set of electric cylinder units 1 according to the feedback of the electric drive controller 8 and the deceleration condition of the vehicle, and the pressure closed-loop control is completed.
Step five, the second set of braking units build pressure: when the first set of electric cylinder units 1 fails or builds up pressure insufficiently, the central control unit 4 starts the second servo motor 21 of the second set of electric cylinder units 2 according to the braking requirement, and is connected to the second electric cylinder piston 23 through the second transmission mechanism 22, and builds up pressure in the second electric cylinder cavity 24. Meanwhile, the central control unit 4 sends the fault diagnosis result to the cloud operation and maintenance control center through the vehicle-mounted Internet of things unit 9 so as to facilitate the vehicle to be unfolded for fault rescue.
Step six, opening an electromagnetic valve to conduct an oil way: the central control unit 4 opens the third two-position two-way valve 19 and the fourth two-position two-way valve 20, and the hydraulic control unit 5 conducts the wheel cylinder 6 system through a hydraulic pipeline to realize vehicle braking.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. A brake-by-wire device having safety redundancy, comprising: the hydraulic control system comprises a first set of electric cylinder units (1), a second set of electric cylinder units (2), an oil can (3), a central control unit (4), a hydraulic control unit (5) and wheel cylinders (6);
the first set of electric cylinder units (1) are connected with the oilcan (3) and the hydraulic control unit (5), the second set of electric cylinder units (2) are connected with the oilcan (3) and the hydraulic control unit (5), and the hydraulic control unit (5) is connected with the wheel cylinder (6);
the central control unit (4) is connected with the first set of electric cylinder units (1), the second set of electric cylinder units (2), the oilcan (3) and the hydraulic control unit (5).
2. The brake-by-wire device with safety redundancy according to claim 1, characterized in that the first set of electric cylinder units (1) comprises: the device comprises a first servo motor (10), a first transmission mechanism (11), a first electric cylinder piston (12), a first electric cylinder cavity (13) and a first electric cylinder compensation hole (14);
the first electric cylinder piston (12) is arranged in the first electric cylinder cavity (13), and the first servo motor (10) is connected with the first electric cylinder piston (12) in a transmission way through the first transmission mechanism (11);
the first electric cylinder cavity (13) is communicated with the oilcan (3) through the first electric cylinder compensation hole (14) and a hydraulic pipeline, and the first electric cylinder cavity (13) is connected with the hydraulic control unit (5).
3. The brake-by-wire device with safety redundancy according to claim 2, characterized in that the second set of electric cylinder units (2) comprises: a second servo motor (21), a second transmission mechanism (22), a second electric cylinder piston (23), a second electric cylinder cavity (24) and a second electric cylinder compensation hole (25);
the second electric cylinder piston (23) is arranged in the second electric cylinder cavity (24), and the second servo motor (21) is connected with the second electric cylinder piston (23) in a transmission way through the second transmission mechanism (22);
the second electric cylinder cavity (24) is communicated with the oilcan (3) through the second electric cylinder compensation hole (25) and a hydraulic pipeline, and the second electric cylinder cavity (24) is connected with the hydraulic control unit (5).
4. The brake-by-wire device with safety redundancy according to claim 1, characterized in that the oilcan (3) comprises: a first oilcan cavity (28), a second oilcan cavity (29) and a liquid level sensor (30);
the first oilcan cavity (28) is connected with the first set of electric cylinder units (1) through an oil duct, and the second oilcan cavity (29) is connected with the second set of electric cylinder units (2) through an oil duct;
the liquid level sensor (30) is arranged inside the oil pot (3).
5. The brake-by-wire device with safety redundancy according to claim 1, characterized in that the central control unit (4) comprises: a first control hardware (31) and a second control hardware (32);
the first control hardware (31) and the second control hardware (32) are independently provided with a power supply and a communication line.
6. A brake-by-wire apparatus with safety redundancy as claimed in claim 3, wherein: one end of a first pressure sensor (15) is connected with the first electric cylinder cavity (13), and the other end of the first pressure sensor is connected with the central control unit (4);
one end of a first rotor position sensor (16) is connected with the first servo motor (10), and the other end of the first rotor position sensor is connected with the central control unit (4);
one end of a second pressure sensor (26) is connected with the second electric cylinder cavity (24), and the other end of the second pressure sensor is connected with the central control unit (4);
one end of a second rotor position sensor (27) is connected with the second servo motor (21), and the other end of the second rotor position sensor is connected with the central control unit (4).
7. A brake-by-wire apparatus with safety redundancy as claimed in claim 3, wherein: the central control unit (4) is connected with the first servo motor (10) and the second servo motor (21).
8. The brake-by-wire apparatus with safety redundancy according to claim 7, wherein: the central control unit (4) is connected with the automatic driving controller (7), the electric driving controller (8) and the vehicle-mounted Internet of things unit (9).
9. The brake-by-wire device with safety redundancy according to claim 8, characterized in that the hydraulic control unit (5) comprises: a first two-position two-way valve (17), a second two-position two-way valve (18), a third two-position two-way valve (19) and a fourth two-position two-way valve (20);
the first two-position two-way valve (17), the second two-position two-way valve (18), the third two-position two-way valve (19) and the fourth two-position two-way valve (20) are connected with the central control unit (4) and the wheel cylinder (6).
10. A method of using the brake-by-wire device with safety redundancy of claim 9, comprising the steps of:
step S1, receiving an active braking request: the automatic driving controller (7) recognizes the working condition of braking through a peripheral camera, a radar or navigation positioning information and transmits braking request information to the central control unit (4);
step S2, the first set of braking units build pressure: the central control unit (4) starts the first servo motor (10) according to the braking requirement, and drives the first electric cylinder piston (12) to build pressure in the first electric cylinder cavity (13) through the first transmission mechanism (11);
step S3, opening an electromagnetic valve to conduct an oil way: the central control unit (4) opens the first two-position two-way valve (17) and the second two-position two-way valve (18), and the hydraulic control unit (5) conducts the wheel cylinder (6) through a hydraulic pipeline to realize vehicle braking;
step S4, pressure control and energy recovery: the central control unit (4) sends an energy recovery request to the electric drive controller (8), and the electric drive controller (8) cuts off the drive motor and starts a charging mode;
the central control unit (4) readjusts the first servo motor (10) according to the feedback of the electric drive controller (8) and the deceleration condition of the vehicle to complete pressure closed-loop control;
step S5, the second set of braking units build pressure: when the first set of electric cylinder units (1) have faults or insufficient pressure building, the central control unit (4) starts the second servo motor (21) according to braking requirements and drives the second electric cylinder piston (23) to build pressure in the second electric cylinder cavity (24) through the second transmission mechanism (22);
meanwhile, the central control unit (4) sends a fault diagnosis result to a cloud operation and maintenance control center through the vehicle-mounted Internet of things unit (9) so as to facilitate fault rescue on vehicle deployment;
step S6, opening an electromagnetic valve to conduct an oil way: the central control unit (4) opens the third two-position two-way valve (19) and the fourth two-position two-way valve (20), and the hydraulic control unit (5) conducts the wheel cylinder (6) system through a hydraulic pipeline to realize vehicle braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310565641.0A CN116424291A (en) | 2023-05-18 | 2023-05-18 | Wire control brake device with safety redundancy and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310565641.0A CN116424291A (en) | 2023-05-18 | 2023-05-18 | Wire control brake device with safety redundancy and use method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116424291A true CN116424291A (en) | 2023-07-14 |
Family
ID=87090938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310565641.0A Pending CN116424291A (en) | 2023-05-18 | 2023-05-18 | Wire control brake device with safety redundancy and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116424291A (en) |
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2023
- 2023-05-18 CN CN202310565641.0A patent/CN116424291A/en active Pending
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