CN107933541B - Electric automobile decoupling zero distributing type intelligence electromagnetic braking system - Google Patents
Electric automobile decoupling zero distributing type intelligence electromagnetic braking system Download PDFInfo
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- CN107933541B CN107933541B CN201711171913.XA CN201711171913A CN107933541B CN 107933541 B CN107933541 B CN 107933541B CN 201711171913 A CN201711171913 A CN 201711171913A CN 107933541 B CN107933541 B CN 107933541B
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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
- B60T13/748—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 electro-magnetic brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- 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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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Abstract
The invention discloses a decoupling distributed intelligent electromagnetic braking system of an electric automobile, which belongs to the technical field of vehicle braking and comprises a vehicle-mounted ECU module, an intelligent electromagnetic braking device, a master control module, a current module, a braking state monitoring module, a command concentration comparison module, an ABS module, a wheel speed sensor, a wheel speed analysis module and the like. The invention has the advantages of compact system structure, convenient arrangement, easy integrated control, easy realization of the integration of the automobile chassis and the like, caters to the development trend of the automobile industry for advanced electrical and electronic technology, and meets the development requirement of the electric automobile chassis tending to the integration in the future.
Description
Technical Field
The invention relates to an electromagnetic braking system, in particular to an electric automobile decoupling distributed intelligent electromagnetic braking system, and belongs to the technical field of vehicle braking.
Background
The brake system is one of important components of an automobile chassis, is directly related to the comprehensive performance of the automobile and the life and property safety of a driver, and although the traditional hydraulic and pneumatic brake systems can meet various requirements of the existing brake laws and regulations, the traditional hydraulic and pneumatic brake systems have the defects of complex pipeline arrangement, large brake system quality, dependence on a vacuum power assisting device, slow brake response speed, incapability of actively adjusting brake torque, relatively high manufacturing cost, difficulty in integrated control with other systems of the automobile and the like, and are not suitable for the future development trend and the requirement of the integrated control of the electric automobile chassis.
The electromagnetic brake is a brake form newly designed in recent years for ensuring the safety of the roller coaster before the roller coaster finally enters the station, and compared with the brake form which uses friction force to decelerate the vehicle, the electromagnetic brake has stronger stability and safety because the electromagnetic brake uses the relevant phenomena and characteristics of physics and electromagnetism to realize the vehicle brake, is safe and reliable, greatly improves the comfortable feeling of the electromagnetic brake compared with the traditional friction brake, and is more stable when the vehicle brakes.
The traditional braking mode needs high hydraulic pressure or high air pressure to realize friction braking and needs to arrange a large number of pipelines on a vehicle chassis, which can lead the whole braking system to occupy a large amount of space of the vehicle chassis, the braking reaction time is longer, the self weight of the vehicle is increased, and the like, while the electromagnetic braking mainly depends on various circuits to transmit current signals to control a complex braking mode, the response speed is extremely high, and the electromagnetic braking is easy to be integrated with other systems of the vehicle, meanwhile, the electromagnetic braking not only can reduce the manufacturing cost of the braking system, but also can obviously reduce the production difficulty of the braking system, and can realize the recycling of the kinetic energy of the vehicle in the braking process by matching with an energy system, thereby completely conforming to the trend of the future development of the electric vehicle technology towards advanced electrical and electronic technology and green and environment-friendly.
Because electromagnetic braking has many advantages that traditional braking does not have, so that various industries are actively researching relevant electromagnetic braking systems, for example, a structure that electromagnetic braking can be used for reducing the speed of an elevator in the lifting process is proposed, but so far, a scheme for carrying out intelligent systematic braking on an automobile by completely using an electromagnetic principle is rarely mentioned.
Disclosure of Invention
The invention mainly aims to provide an electric automobile decoupling distributed intelligent electromagnetic braking system which can quickly, accurately and stably complete the operations of instruction generation, transmission, execution, feedback and the like according to the complex braking condition of an automobile to complete the relevant braking of the automobile, ensure the simple and rapid control of a tail end braking execution device and reduce the braking response time.
The purpose of the invention can be achieved by adopting the following technical scheme:
the core control system is respectively and electrically connected with the input system, the feedback system, the operation response system and the brake display auxiliary system, and exchanges information through circuit signals;
the core control system collects the running conditions of the automobile and integrates the running conditions to form corresponding brake parameters, stores the brake parameters, generates a brake command, sends out a brake execution command, and adjusts and corrects the response of the operation response system;
the input system receives automobile body data, including the force of a driver stepping on a foot brake pedal and the instantaneous speed of wheel driving;
the feedback system collects wheel speed data of each tire of the automobile, monitors the working state of the operation response system and the braking command of the core control system, reports to the core control system when the operation response system is abnormal, and sends out a warning command in real time;
the operation response system realizes automatic parking and four-wheel braking, and the working state of the operation response system comprises an online mode and an offline mode;
the brake display auxiliary system displays brake information, outputs currents with different magnitudes according to different brake commands, controls the on-off of a circuit, unidirectionally inputs currents between the operation response systems, receives wheel speed data of each tire of the automobile, and performs corresponding brake operation to realize an anti-lock function.
Preferably, the core control system comprises a vehicle-mounted ECU module and a master control module, wherein the vehicle-mounted ECU module is electrically connected with the master control module.
In any of the above schemes, preferably, the core control system further includes a left front wheel command module, a right front wheel command module, a left rear wheel command module, and a right rear wheel command module, where the left front wheel command module, the right front wheel command module, the left rear wheel command module, and the right rear wheel command module are all electrically connected to the master control module and respectively receive the braking commands of the master control module.
In any of the above schemes, preferably, the input system includes a foot brake valve module and a pressure force analysis module, the foot brake valve module is electrically connected with the pressure force analysis module, and the pressure force analysis module is electrically connected with the vehicle-mounted ECU module.
In any of the above schemes, preferably, the feedback system includes four wheel speed sensors, a front brake command centralized comparison module and a rear brake command centralized comparison module, and the four wheel speed sensors, the front brake command centralized comparison module and the rear brake command centralized comparison module are all electrically connected to the vehicle-mounted ECU module.
In any of the above schemes, preferably, the feedback system further includes a braking state monitoring module, and the braking state monitoring module is electrically connected with the vehicle-mounted ECU module.
In any one of the above aspects, it is preferable that the operation response system includes a handbrake module electrically connected to the four wheel speed sensors and the on-vehicle ECU module, respectively.
In any of the above schemes, preferably, the operation response system further includes a left front wheel end braking executing device, a right front wheel end braking executing device, a left rear wheel end braking executing device and a right rear wheel end braking executing device, and the left front wheel end braking executing device, the right front wheel end braking executing device, the left rear wheel end braking executing device and the right rear wheel end braking executing device are all electrically connected to the braking state monitoring module.
In any of the above schemes, preferably, the braking display auxiliary system includes a braking system display screen and an ABS module, the braking system display screen is electrically connected to the braking state monitoring module, and the ABS module is electrically connected to the four wheel speed sensors, the left front wheel command module, the right front wheel command module, the left rear wheel command module, and the right rear wheel command module, respectively.
In any of the above schemes, preferably, the braking display auxiliary system further includes a left front wheel current module, a right front wheel current module, a left rear wheel current module and a right rear wheel current module, the left front wheel current module is electrically connected to the left front wheel command module and the left front wheel rear end braking executing device respectively, the right front wheel current module is electrically connected to the right front wheel command module and the right front wheel rear end braking executing device respectively, the left rear wheel current module is electrically connected to the left rear wheel command module and the left rear wheel rear end braking executing device respectively, and the right rear wheel current module is electrically connected to the right rear wheel command module and the right rear wheel rear end braking executing device respectively.
The invention has the beneficial technical effects that:
according to the decoupling distributed intelligent electromagnetic braking system for the electric automobile, provided by the invention, a high hydraulic pressure pipeline and a vacuum boosting device of the whole automobile are not required to be arranged, the dynamic response performance of the system is quick, accurate and stable, the structure is compact, the arrangement is convenient, the production cost is low, and meanwhile, the decoupling distributed intelligent electromagnetic braking system is easy to be integrated with other systems for controlling so as to realize the integration of an automobile chassis.
According to the electric vehicle decoupling distributed intelligent electromagnetic braking system, internal data transmission is carried out through a circuit, the whole set of device does not need an air pressure hydraulic and vacuum power assisting device required by a traditional braking system, braking response time is greatly reduced, braking performance of a whole vehicle can be improved, and life safety of vehicle-mounted personnel can be guaranteed.
According to the decoupling distributed intelligent electromagnetic braking system for the electric automobile, which is provided by the invention, the decoupling distributed intelligent electromagnetic braking system for the electric automobile is controlled by adopting the electronic modules, so that the total mass of the system is lighter, the mass of the whole automobile can be reduced, other performance indexes of the automobile can be improved, and meanwhile, energy can be indirectly saved due to the saving of materials.
According to the decoupling distributed intelligent electromagnetic braking system for the electric automobile, the decoupling distributed intelligent electromagnetic braking system for the electric automobile is compact in structure and easy to integrate and control with other systems of the automobile, and when the interior of the braking system is affected, a running system of the automobile can make corresponding response, so that the integration of an automobile chassis is favorably realized.
According to the decoupling distributed intelligent electromagnetic braking system for the electric automobile, which is provided by the invention, the corresponding safety module is arranged in the decoupling distributed intelligent electromagnetic braking system for the electric automobile, and when the braking system has large disturbance or abnormal fault, the safety module can operate to ensure the safety of the automobile as much as possible.
According to the decoupling distributed intelligent electromagnetic braking system for the electric automobile, compared with the traditional braking system, the decoupling distributed intelligent electromagnetic braking system for the electric automobile can reduce the operation amount of a driver, can automatically perform a hand braking function, and can prevent accidents such as vehicle sliding and the like caused by the omission of the operation of the driver.
Drawings
FIG. 1 is a schematic overall structure diagram of a preferred embodiment of an electric vehicle decoupling distributed intelligent electromagnetic braking system according to the invention;
fig. 2 is an explanatory diagram of the arrangement position of a preferred embodiment of the electric vehicle decoupling distributed intelligent electromagnetic braking system according to the present invention, which may be the same embodiment as fig. 1 or different embodiment from fig. 1.
In the figure: 1-vehicle ECU module, 2-master control module, 3-foot brake valve module, 4-pressure force analysis module, 5-wheel speed sensor, 6-hand brake module, 7-front brake command centralized comparison module, 8-rear brake command centralized comparison module, 9-left front wheel command module, 10-right front wheel command module, 11-left rear wheel command module, 12-right rear wheel command module, 13-ABS module, 14-left front wheel current module, 15-right front wheel current module, 16-left rear wheel current module, 17-right rear wheel current module, 18-left front wheel end brake execution device, 19-right front wheel end brake execution device, 20-left rear wheel end brake execution device, 21-right rear wheel end brake execution device, 22-a brake system display screen, 23-a brake state monitoring module, 24-wheels and 25-an electromagnetic brake system.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1 and fig. 2, the decoupling distributed intelligent electromagnetic braking system for an electric vehicle provided in this embodiment includes a core control system, an input system, a feedback system, an operation response system, and a braking display auxiliary system, where the core control system is electrically connected to the input system, the feedback system, the operation response system, and the braking display auxiliary system, respectively, and exchanges information with each other through circuit signals;
the core control system collects the running conditions of the automobile and integrates the running conditions to form corresponding brake parameters, stores the brake parameters, generates a brake command, sends out a brake execution command, and adjusts and corrects the response of the operation response system;
the input system receives automobile body data, including the force of a driver stepping on a foot brake pedal and the instantaneous speed of wheel driving;
the feedback system collects wheel speed data of each tire of the automobile, monitors the working state of the operation response system and the braking command of the core control system, reports to the core control system when the operation response system is abnormal, and sends out a warning command in real time;
the operation response system realizes automatic parking and four-wheel braking, and the working state of the operation response system comprises an online mode and an offline mode;
the brake display auxiliary system displays brake information, outputs currents with different magnitudes according to different brake commands, controls the on-off of a circuit, unidirectionally inputs currents between the operation response systems, receives wheel speed data of each tire of the automobile, and performs corresponding brake operation to realize an anti-lock function.
Further, in this embodiment, as shown in fig. 1, the core control system includes a vehicle-mounted ECU module 1, a general control module 2, a left front wheel command module 9, a right front wheel command module 10, a left rear wheel command module 11, and a right rear wheel command module 12, where the vehicle-mounted ECU module 1 is electrically connected to the general control module 2, and the left front wheel command module 9, the right front wheel command module 10, the left rear wheel command module 11, and the right rear wheel command module 12 are electrically connected to the general control module 2 and respectively receive a braking command of the general control module 2.
Further, in this embodiment, as shown in fig. 1, the input system includes a foot brake valve module 3 and a pressure force analysis module 4, the foot brake valve module 3 is electrically connected to the pressure force analysis module 4, and the pressure force analysis module 4 is electrically connected to the vehicle-mounted ECU module 1.
Further, in this embodiment, as shown in fig. 1, the feedback system includes four wheel speed sensors 5, a front brake command centralized comparison module 7, a rear brake command centralized comparison module 8 and a brake state monitoring module 23, the four wheel speed sensors 5, the front brake command centralized comparison module 7 and the rear brake command centralized comparison module 8 are all electrically connected to the vehicle-mounted ECU module 1, and the brake state monitoring module 23 is electrically connected to the vehicle-mounted ECU module 1.
Further, in this embodiment, as shown in fig. 1, the operation response system includes a hand brake module 6, a left front wheel end brake executing device 18, a right front wheel end brake executing device 19, a left rear wheel end brake executing device 20 and a right rear wheel end brake executing device 21, the hand brake module 6 is electrically connected to the four wheel speed sensors 5 and the vehicle-mounted ECU module 1, respectively, and the left front wheel end brake executing device 18, the right front wheel end brake executing device 19, the left rear wheel end brake executing device 20 and the right rear wheel end brake executing device 21 are electrically connected to the brake state monitoring module 23.
Further, in this embodiment, as shown in fig. 1, the braking display auxiliary system includes a braking system display screen 22, an ABS module 13, a left front wheel current module 14, a right front wheel current module 15, a left rear wheel current module 16 and a right rear wheel current module 17, the braking system display screen 22 is electrically connected to the braking state monitoring module 23, the ABS module 13 is electrically connected to the four wheel speed sensors 5, the left front wheel command module 9, the right front wheel command module 10, the left rear wheel command module 11 and the right rear wheel command module 12, respectively, the left front wheel current module 14 is electrically connected to the left front wheel command module 9 and the left front wheel end braking executing device 18, respectively, the right front wheel current module 15 is electrically connected to the right front wheel command module 10 and the right front wheel end braking executing device 19, respectively, the left rear wheel current module 16 is electrically connected with the left rear wheel command module 11 and the left rear wheel tail end brake execution device 20 respectively, and the right rear wheel current module 17 is electrically connected with the right rear wheel command module 12 and the right rear wheel tail end brake execution device 21 respectively.
Further, in this embodiment, the vehicle-mounted ECU module is responsible for collecting and integrating the driving conditions of the vehicle to form corresponding braking parameters and sending the braking parameters to the master control module, and then the master control module receives the information from the vehicle-mounted ECU module and simultaneously undertakes receiving, issuing and adjusting of the braking commands of the whole set of braking system to enable the system to operate efficiently and orderly, and finally, the intelligent electromagnetic braking device in the system completes the braking commands issued by the system at the tail end of the system, namely the inner axle position of each tire of the vehicle, namely the braking operation really required by the vehicle to achieve the purpose of deceleration and even stop. The brake system is arranged at the chassis of the automobile, exchanges information among the information through circuit signals, and can interact with other systems of the automobile to realize chassis integrated control.
Furthermore, in this embodiment, the vehicle-mounted ECU module is a core part of the electromagnetic braking system, and is equivalent to the "brain" of the system, and its main function is to receive external data related to the vehicle, such as the force of the driver pressing the brake pedal, the instantaneous wheel driving speed, etc., sent by each sensing device in time, and these data are analyzed and integrated after entering the vehicle-mounted ECU module, and further form braking parameters, such as control statements related to the vehicle, etc., and at the same time, the vehicle-mounted ECU module will store some useful special numbers for the driver to refer to or have related influence on the subsequent braking, for example, the system will remind the driver whether to maintain and repair the braking system of the vehicle according to the intensity and time length of the driver performing braking. In addition, the ECU module on board the system can also receive signals of other systems of the automobile, such as rain, dust and the like, and the ECU can also analyze the data and combine the data with the braking condition of the automobile to calculate the optimal braking parameter. After the relevant braking parameters are formed in the vehicle-mounted ECU module, the vehicle-mounted ECU module immediately sends the braking parameters to a master control module of the system through a circuit to carry out the next response. This is the brain module in the present invention.
Further, in this embodiment, the master control module is another core module in the set of intelligent electromagnetic braking system, and is also a "cerebellum" of the system, and as the name suggests, the master control module is mainly responsible for the regulation function of the automobile braking, and has a large number of incoming and outgoing connections. The brain vehicle-mounted ECU module needs the automobile to complete braking and important instant information generated by each component of a braking system can enter the cerebellum main control module through a related circuit. The master control module can quickly integrate the brake parameters transmitted from the vehicle-mounted ECU module and each part of the system, and send out brake execution commands through each circuit or adjust and correct the response of each relevant brake execution device, so that the tail end brake devices at each wheel are kept in coordination. In addition, when the driver needs emergency braking, external signals directly enter the master control module and send corresponding brake execution commands, so that the analysis process time of the vehicle-mounted ECU module is saved, and the automobile can meet the quick response brake requirement during emergency braking to guarantee the life and property safety of the driver to the maximum extent. The master control module is a cerebellum part in the system, and forms a core part of an electromagnetic braking system with a brain part vehicle-mounted ECU module, the two parts cooperate with each other to efficiently cooperate to form a central command core part of the system together, so that the influence of a system caused by overlarge working strength of one module can be avoided, the whole braking system can reach a quick, accurate and stable working state, the high-standard braking requirement of the future electric automobile can be met, and the master control module is also a new bright spot of the braking system and is a big performance in the aspect of intellectualization of the system.
Furthermore, in this embodiment, the left front wheel command module, the right front wheel command module, the left rear wheel command module, and the right rear wheel command module mainly have two functions, the first is to receive a command from the master control module, and the four independent modules are arranged because the real state of the vehicle is very complex in the driving and braking process, for example, a sudden speed change may occur when a certain tire is subjected to a sudden rigid impact, at this time, the ECU of the system and the master control module individually issue different commands to the brake execution devices corresponding to the tires therein to adjust the braking of the whole vehicle so as to keep the vehicle stable and safe in braking, and the four modules are combined into one module to prevent the braking from failing, and once one braking module fails, the other three modules can continue to work. The second function is to convert the received command into a command for controlling a current module in a control system, so as to indirectly control a terminal braking device, and therefore, the purpose that a master control module directly controls the current module is not to enable the terminal-beyond module to be simpler as much as possible, and meanwhile, the four small modules are also directly connected with an ABS module in the system, directly receive signals sent by the ABS module and are mutually integrated with other signals to be controlled in the next step.
Further, in this embodiment, the system includes four current modules, which output currents of different magnitudes or control on/off of the circuit according to different signals sent by the small command module, and the connection between the current modules and the end braking executing device is a one-way channel, that is, the current modules input currents to the end device. Each current module corresponds to a small module independently, and the modules do not interfere with each other and are independent when the current modules work. That is to say that each current module is responsible for only one corresponding mini-command module.
Further, in this embodiment, the ABS module has eight total interfaces, wherein four input ports receive data from the wheel speed sensors of the tires of the vehicle, and the other four output ports are respectively directed to the four mini command modules in the previous segment. The four inputs and the four outputs are respectively in one-to-one correspondence, when the ABS module needs to work, the ABS module sends a signal to the small command module to enable the current output by the current module to continuously generate discontinuous response, and therefore the end device continuously performs corresponding braking operation to achieve an anti-lock function and prevent reduction of braking effect.
Further, in this embodiment, the braking state monitoring module is configured to monitor a working state of the end braking executing device, and report to the system brain vehicle-mounted ECU module and execute a command for warning a driver if an abnormality such as a power failure occurs in the executing device. The module is communicated with a running system of the automobile, if the braking condition is abnormal, the running system is recommended to carry out operations such as speed limiting of the automobile, and speed limiting parameters need to be set before the operations. The brake state monitoring module is used as a part of the electromagnetic brake system and is mutually connected with other systems of the automobile, when the brake system has special conditions, other systems of the automobile can be correspondingly influenced, the interaction among the systems is to create a safe and relieved driving environment for a driver as much as possible, and the integration of the automobile chassis is embodied, and meanwhile, a seed is buried for a future unmanned driving mode.
Further, in this embodiment, the electronic display screen of the braking system translates the relevant braking data sent by the braking state monitoring module and displays the translated braking data to the driver for viewing and reference. Whether normal braking, abnormal braking system or emergency braking is displayed on the screen. The screen has two in total, and driver's seat department has one in the car, and the outside rear of a vehicle department also has one and is used for providing the reference of traveling for other drivers on the road.
Further, in this embodiment, a wheel speed sensing device is separately provided near each wheel, and the wheel speed sensing devices of the braking system have three data output ports. After the wheel speed sensing devices respectively acquire the speed data of the automobile tires, the speed data are firstly and directly transmitted to the brain vehicle-mounted ECU module to acquire braking state information; the second is sent to the ABS module, and because the set of brake devices are in a decoupling and distributing type, the brake states of all wheels are not necessarily the same, so that the ABS module needs to send an anti-lock instruction after specific analysis according to specific conditions; and the data of the third output port can be sent to a hand brake module in the system to realize corresponding intelligent operation.
Furthermore, in this embodiment, the hand brake module is a part of the second braking system that communicates with other modules of the vehicle, and the hand brake module is equivalent to a hand brake device in a conventional braking system, but does not require manual operation by a driver at all, and the on-line and off-line of the working state of the hand brake module are automatically completed according to the state of the vehicle, and the data of the hand brake module is also transmitted to the vehicle-mounted ECU module through a corresponding channel, and when the vehicle decelerates to zero, the hand brake module automatically operates to prevent the vehicle from dangerous situations such as slipping; when a driver begins to step on the accelerator, the module is automatically off-line to ensure the normal starting of the automobile, so that the driving workload of the driver can be reduced, and the serious consequences caused by forgetting to pull the hand brake in the traditional driving can be avoided.
Further, in this embodiment, the front brake command centralized comparison module and the rear brake command centralized comparison module are used for monitoring commands by the ECU, whether normal braking or single braking, so as to find out problems in time, and the modules receive brake commands from two wheels in charge of the modules, and then transmit the brake commands to the vehicle-mounted ECU module for processing after comparison. The module is also a safety module of the system, so that the braking safety performance of the whole vehicle is ensured, and problems are found in time and are treated in time to avoid the occurrence of unexpected situations.
Further, in the present embodiment, a foot brake valve pedal is indispensable in the brake system, and its main function is of course to receive a brake demand signal from the driver and input it into the brake system to perform a corresponding braking operation to achieve the braking effect required by the driver. The foot brake valve in the device is essentially a force sensor, a driver can make different foot force responses according to complicated and changeable road conditions, if the braking is urgent, the driver can certainly step the pedal to the bottom, and if the braking is not urgent, the driver can possibly step the brake pedal lightly, which is the instinctive response of people, so the foot brake valve in the system is equivalent to the force sensor.
Furthermore, in this embodiment, the force pressure analysis module is used in the system for analyzing the state of the brake pedal, and receives information of pressure generated by the foot brake valve through a circuit, and a pressure reference boundary line is set in the force analysis module during system design, so as to determine whether the brake system performs conventional braking or emergency braking, and whether the driver has an emergency demand for braking, and after analysis, the relevant brake data is transmitted to the vehicle-mounted ECU module for corresponding further braking operation, and data transmission between the foot brake pedal and the force analysis module and data transmission between the force analysis module and the vehicle-mounted ECU module are all one-way circuit channels.
Furthermore, in this embodiment, the braking system adopts a basic total braking mode of obtaining information, analyzing information and executing information to complete corresponding braking operations in a well-ordered manner, and meanwhile, a corresponding braking monitoring module is added to ensure the normal operation of the system and achieve a certain braking effect so as to ensure the life and property safety of a driver, the division of labor among parts in the system is clear, the connection manner among the modules is simple, and finally, the effect of braking and decelerating is achieved through a terminal braking device.
Further, in this embodiment, as shown in fig. 1 and fig. 2, when the driver needs to perform braking under normal conditions, the driver will send a certain amount of force as braking energy to the braking system according to the specific driving condition of the road and the condition of the biological instinct to activate the response, that is, the foot braking module 3 will receive a certain pressure. Then the foot braking module 3 transmits the information to the pressure analysis module 4 for analysis, and the pressure analysis module 4 sets a pressure critical value in the interior thereof during manufacturing to judge whether the instantaneous braking requirement of the driver is normal braking or emergency braking, because the driver can step the brake pedal to the end certainly during emergency braking, and the driver can step the pedal lightly according to different situations during normal braking. The pressure analysis module 4 sends each analyzed data to the vehicle-mounted ECU module 1, the vehicle-mounted ECU module 1 is equivalent to the brain of the brake system and is specially responsible for acquiring various working conditions of the vehicle, the ECU performs complex and ordered brake analysis after acquiring information, for example, the brake demand of the vehicle is judged, the brake emergency degree of the vehicle is judged, the operation requirement of a terminal brake execution device of the vehicle is judged, the brake intention of the whole set of brake system can be from the vehicle-mounted ECU module 1, then the vehicle-mounted ECU module 1 communicates with the main control module 2 of the system, the main control module 2 can perform feedback on the receiving degree of the data after the vehicle-mounted ECU module 1 sends command data to the main control module 2, and the data receiving condition of the vehicle-mounted ECU module 1 is told, and therefore the two modules are connected through a bidirectional channel. The main control module 2 can quickly integrate the brake parameters transmitted from the vehicle-mounted ECU module 1, and respectively and independently send brake execution commands to the left front wheel command module 9, the right front wheel command module 10, the left rear wheel command module 11 and the right rear wheel command module 12 of each command module through each circuit. The left front wheel current module 14, the right front wheel current module 15, the left rear wheel current module 16 and the right rear wheel current module 17 of each current module output specified currents according to simple current control commands transmitted by the command modules to control the left front wheel tail end brake executing device 18, the right front wheel tail end brake executing device 19, the left rear wheel tail end brake executing device 20 and the right rear wheel tail end brake executing device 21 of the tail end electromagnetic brake executing device, and finally brake deceleration is realized.
When a driver needs emergency braking, the driver can step on the brake module 3 by a hard foot, the pressure analysis module 4 receives corresponding information and analyzes that the driver needs emergency braking, data is immediately sent to the vehicle-mounted ECU module 1, then the whole system is commanded to carry out omnibearing braking according to the braking response mode, all parts capable of executing braking enter a response state and work to the maximum extent, if the wheel speed sensor 5 excites the ABS module 13 to input an anti-lock command to the left front wheel command module 9, the right front wheel command module 10, the left rear wheel command module 11 and the right rear wheel command module 12 of the four command modules during high-speed driving, the ABS module 13 does not work at low speed, and corresponding speed boundary parameters are set in the ABS module 13 during processing.
In addition, when the driver decelerates the automobile to 0, the hand brake module 6 will work automatically and move out of the working state when the driver steps on the accelerator. The hand brake module 6 sends brake data to the vehicle-mounted ECU module 1 after entering a working state, and controls a terminal current through a braking mode of the system to enable friction braking parts in the left front wheel terminal brake executing device 18, the right front wheel terminal brake executing device 19, the left rear wheel terminal brake executing device 20 and the right rear wheel terminal brake executing device 21 of the terminal brake executing device to enter the working state, so that dangerous actions such as vehicle sliding and the like of the vehicle are avoided, and a display screen 22 of the brake system can timely display brake operation parameters related to the brake system.
In summary, in the embodiment, according to the decoupling distributed intelligent electromagnetic braking system for an electric vehicle of the embodiment, the decoupling distributed intelligent electromagnetic braking system for an electric vehicle provided by the embodiment does not need to arrange a high hydraulic pressure air pressure pipeline and a vacuum booster of the whole vehicle, has fast, accurate and stable dynamic response performance, compact structure, convenient arrangement and low production cost, and is easy to integrate with other systems for control so as to realize integration of a chassis of the vehicle; the data transmission inside is carried out through the circuit, and the whole set of device does not need the required atmospheric pressure hydraulic pressure of traditional braking system and vacuum power assisting device, and braking response time will obtain the reduction of big degree, can improve the brake performance of whole car and can ensure on-vehicle personnel's life safety.
According to the decoupling distributed intelligent electromagnetic braking system for the electric vehicle, the decoupling distributed intelligent electromagnetic braking system for the electric vehicle is controlled by the electronic modules, so that the total mass of the system is lighter, the mass of the whole vehicle can be reduced, other performance indexes of the vehicle can be improved, and meanwhile, energy can be indirectly saved due to material saving; the integrated control system has compact structure and is easy to be integrated with other systems of the automobile for control, and when the interior of the brake system is influenced, the running system of the automobile can also make corresponding response, thus being beneficial to the realization of the integration of the automobile chassis.
According to the decoupling distributed intelligent electromagnetic braking system for the electric vehicle, which is provided by the embodiment, the system is provided with the corresponding safety module, and when the braking system is greatly disturbed or has an abnormal fault, the safety module can operate to ensure the safety of the vehicle as much as possible; compared with the traditional braking system, the system can reduce the operation amount of a driver, can automatically perform the hand brake function, and prevents accidents such as vehicle sliding caused by the omission of the operation of the driver.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (10)
1. The electric automobile decoupling distributed intelligent electromagnetic braking system is characterized by comprising a core control system, an input system, a feedback system, an operation response system and a brake display auxiliary system, wherein the core control system is electrically connected with the input system, the feedback system, the operation response system and the brake display auxiliary system respectively, and exchanges information through circuit signals;
the core control system collects the running conditions of the automobile and integrates the running conditions to form corresponding brake parameters, stores the brake parameters, generates a brake command, sends out a brake execution command, and adjusts and corrects the response of the operation response system;
the input system receives automobile body data, including the force of a driver stepping on a foot brake pedal and the instantaneous speed of wheel driving;
the feedback system collects wheel speed data of each tire of the automobile, monitors the working state of the operation response system and the braking command of the core control system, reports to the core control system when the operation response system is abnormal, and sends out a warning command in real time;
the operation response system realizes automatic parking and four-wheel braking, and the working state of the operation response system comprises an online mode and an offline mode;
the brake display auxiliary system displays brake information, outputs currents with different magnitudes according to different brake commands and controls the on-off of a circuit, and the brake display auxiliary system outputs currents to the operation response systems in a single direction, receives wheel speed data of each tire of the automobile and carries out corresponding brake operation to achieve an anti-lock function.
2. The electric automobile decoupling distributed intelligent electromagnetic braking system according to claim 1, wherein the core control system comprises an on-board ECU module (1) and a master control module (2), and the on-board ECU module (1) is electrically connected with the master control module (2).
3. The electric automobile decoupling distributed intelligent electromagnetic braking system according to claim 2, wherein the core control system further comprises a left front wheel command module (9), a right front wheel command module (10), a left rear wheel command module (11) and a right rear wheel command module (12), and the left front wheel command module (9), the right front wheel command module (10), the left rear wheel command module (11) and the right rear wheel command module (12) are all electrically connected with the master control module (2) and respectively receive braking commands of the master control module (2).
4. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 3, wherein the input system comprises a foot brake valve module (3) and a pressure force analysis module (4), the foot brake valve module (3) is electrically connected with the pressure force analysis module (4), and the pressure force analysis module (4) is electrically connected with the vehicle-mounted ECU module (1).
5. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 4, wherein the feedback system comprises four wheel speed sensors (5), a front brake command centralized comparison module (7) and a rear brake command centralized comparison module (8), and the four wheel speed sensors (5), the front brake command centralized comparison module (7) and the rear brake command centralized comparison module (8) are all electrically connected with the vehicle-mounted ECU module (1).
6. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 5, characterized in that the feedback system further comprises a braking state monitoring module (23), and the braking state monitoring module (23) is electrically connected with the vehicle-mounted ECU module (1).
7. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 6, characterized in that the operation response system comprises a hand brake module (6), and the hand brake module (6) is electrically connected with the four wheel speed sensors (5) and the vehicle-mounted ECU module (1) respectively.
8. The electric automobile decoupling distributed intelligent electromagnetic braking system according to claim 7, wherein the operation response system further comprises a left front wheel end braking executing device (18), a right front wheel end braking executing device (19), a left rear wheel end braking executing device (20) and a right rear wheel end braking executing device (21), and the left front wheel end braking executing device (18), the right front wheel end braking executing device (19), the left rear wheel end braking executing device (20) and the right rear wheel end braking executing device (21) are all electrically connected with the braking state monitoring module (23).
9. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 8, wherein the braking display auxiliary system comprises a braking system display screen (22) and an ABS module (13), the braking system display screen (22) is electrically connected with the braking state monitoring module (23), and the ABS module (13) is electrically connected with the four wheel speed sensors (5), the left front wheel command module (9), the right front wheel command module (10), the left rear wheel command module (11) and the right rear wheel command module (12), respectively.
10. The electric vehicle decoupling distributed intelligent electromagnetic braking system according to claim 9, characterized in that the braking display auxiliary system also comprises a left front wheel current module (14), a right front wheel current module (15), a left rear wheel current module (16) and a right rear wheel current module (17), the left front wheel current module (14) is respectively and electrically connected with the left front wheel command module (9) and the left front wheel tail end brake actuating device (18), the right front wheel current module (15) is respectively electrically connected with the right front wheel command module (10) and the right front wheel tail end brake actuating device (19), the left rear wheel current module (16) is respectively and electrically connected with the left rear wheel command module (11) and the left rear wheel tail end brake actuating device (20), the right rear wheel current module (17) is respectively electrically connected with the right rear wheel command module (12) and the right rear wheel tail end brake execution device (21).
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| CN109398071B (en) * | 2018-11-22 | 2024-04-05 | 江苏理工学院 | Intelligent active air inlet grille of automobile |
| CN112918455A (en) * | 2021-03-05 | 2021-06-08 | 东风汽车集团股份有限公司 | Chassis control method, system and storage medium for automatic driving of automobile |
| CN115140001B (en) * | 2022-08-17 | 2024-05-03 | 杭叉集团股份有限公司 | Electro-hydraulic composite braking system of reloading electric forklift and control method |
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