CN114604215A - Electronic brake system - Google Patents
Electronic brake system Download PDFInfo
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- CN114604215A CN114604215A CN202210184441.6A CN202210184441A CN114604215A CN 114604215 A CN114604215 A CN 114604215A CN 202210184441 A CN202210184441 A CN 202210184441A CN 114604215 A CN114604215 A CN 114604215A
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- electromagnetic valve
- controller
- brake
- hydraulic
- pressure
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- 239000007788 liquid Substances 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000004146 energy storage Methods 0.000 claims abstract description 25
- 230000001133 acceleration Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 25
- 239000003921 oil Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 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
- B60T13/12—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 the fluid being liquid
- B60T13/16—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 the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/20—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 the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump driving means
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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
-
- 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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to an electronic brake system, which comprises a pedal assembly, a controller, a pressure unit and an actuating mechanism, wherein the pedal assembly is connected with the controller, the pressure unit comprises a liquid storage tank, an energy storage device, a hydraulic main path and a hydraulic branch path, the energy storage device is provided with an energy storage pressure sensor, the liquid storage tank is connected with the energy storage device through the hydraulic main path, the hydraulic main path is connected with a pump and a pressure maintaining electromagnetic valve in series, the pump is provided with a motor, the hydraulic main path between the pump and the pressure maintaining electromagnetic valve is connected with the actuating mechanism through each hydraulic branch path in a corresponding mode one by one, each hydraulic branch path is provided with a corresponding brake electromagnetic valve, and the controller is also connected with the motor, the energy storage pressure sensor, the pressure maintaining electromagnetic valve and the brake electromagnetic valve respectively. The cooperation is controlled actuating mechanism braking, ensures that the energy storage ware is in energy storage, energy storage state, can in time respond the cooperation braking, lets the braking stable, timely, and is more practical, safer. In addition, the brake system cancels a booster and a main cylinder, thereby reducing the cost, lightening the weight and being more portable.
Description
Technical Field
The invention relates to a vehicle braking mechanism, in particular to an electronic braking system.
Background
In the process of driving vehicles such as automobiles and the like, braking is often required, and the purpose of braking is achieved by conveying hydraulic oil (namely brake fluid) to each brake slave cylinder through a vacuum booster or an electric booster by a master cylinder in a braking system. The stable and timely response hydraulic oil way is important for braking and can ensure safety. The redundant design is also an important aspect of the safety guarantee of the brake system. In addition, light weight, energy conservation, emission reduction and energy recovery are also the problems needing to be considered in braking at present, and the better energy-saving and environment-friendly design can save the consumption of energy sources such as fuel oil or electric energy and is more green and environment-friendly.
Disclosure of Invention
In view of the technical problems in the background art, the technical problem to be solved by the present invention is to provide an electronic braking system. The brake is more stable, faster and safer.
In order to solve the technical problems, the invention adopts the following technical scheme: electronic brake system, including footboard assembly, controller, pressure unit and actuating mechanism, its characterized in that: the pedal assembly is connected with the controller, the pressure unit comprises a liquid storage tank, an energy accumulator, a hydraulic main path and a hydraulic branch path, the energy accumulator is provided with an energy storage pressure sensor, the liquid storage tank is connected with the energy accumulator through the hydraulic main path, a pump and a pressure maintaining electromagnetic valve are connected in series on the hydraulic main path, the pump is provided with a motor, the hydraulic main path between the pump and the pressure maintaining electromagnetic valve is correspondingly connected with each actuating mechanism one by one through each hydraulic branch path, each hydraulic branch path is provided with a corresponding brake electromagnetic valve, and the controller is further connected with the motor, the energy storage pressure sensor, the pressure maintaining electromagnetic valve and the brake electromagnetic valve.
A main path one-way valve is also connected in series on the hydraulic main path and is positioned between the hydraulic branch path and the pump or between the pump and the liquid storage tank; a hydraulic branch between each brake electromagnetic valve and the corresponding actuating mechanism is respectively connected with a liquid return pipeline, each liquid return pipeline is connected with a corresponding pressure relief electromagnetic valve in series, the pressure relief electromagnetic valves are connected with a controller, and each liquid return pipeline is connected with a liquid storage tank; at least one of a wheel speed sensor, a vehicle body speed sensor and a vehicle longitudinal acceleration sensor is also coupled to the controller.
The controller is also connected with at least one of a steering wheel position sensor, a steering wheel torsion sensor and a vehicle transverse acceleration sensor; the brake electromagnetic valve adopts a one-way electromagnetic valve.
Each hydraulic branch is respectively connected with a self-checking one-way valve in series, each self-checking one-way valve is connected in front of the corresponding brake electromagnetic valve in series, a liquid return pipeline between each brake electromagnetic valve and the corresponding pressure relief electromagnetic valve or a pipeline pressure sensor is arranged on each hydraulic branch between each brake electromagnetic valve and the actuating mechanism, and the pipeline pressure sensor is connected with the controller; the pressure relief electromagnetic valve is a one-way electromagnetic valve.
The controller is connected with the whole vehicle ECU, and the whole vehicle ECU is connected with a driving power source which comprises a motor and/or a fuel engine.
The actuating mechanism comprises a brake wheel cylinder and/or a brake caliper.
The brake calipers adopt electronic calipers which are connected with a controller.
The controller is also coupled to at least one of the radar, the camera, the infrared sensor, and the distance sensor.
The pressure maintaining electromagnetic valve adopts a one-way electromagnetic valve; the pedal assembly comprises at least one of a pedal pressure sensor, a position sensor, a speed sensor, a contact switch and a damper; the damper comprises at least one of a spring, a high polymer elastic material, liquid, gas, permanent magnet and electromagnetism.
The hydraulic main path between the hydraulic branch and the liquid storage tank is also connected with a standby pump, the standby pump and the pump are arranged in series or in parallel, the standby pump is provided with a standby motor, and the standby motor is connected with the controller.
The invention has the advantages that the brake can be carried out by matching with the operation and control actuating mechanism, the energy accumulator can be ensured to be in an energy storage state and an energy storage state, and the brake can be carried out by responding to the matching in time, so that the brake is stable, timely, more practical and safer. In addition, the brake system cancels a booster and a main cylinder, thereby reducing the cost, lightening the weight and being more portable.
After optimization, a pressure relief electromagnetic valve is designed to relieve pressure and return oil to a liquid storage tank, so that the oil return speed is prevented from being reduced by a pump during oil return, and the pressure relief electromagnetic valve, a brake electromagnetic valve and each sensor are matched to control an actuating mechanism to brake, so that the safety of a vehicle is ensured; according to the comprehensive signal, the independent accurate control of any brake pipeline pressure can be realized through the alternate on-off control of the brake electromagnetic valve and the pressure relief electromagnetic valve, so that the purpose of stable, rapid and safe braking is realized.
The pressure and the flow of the brake oil (namely, the brake fluid) can be accurately controlled through a sensor and a controller.
In addition, whether pipelines of corresponding parts of the execution mechanisms leak or not can be automatically detected through optimization, and potential safety hazards existing in the brake system can be timely found.
And the ECU of the whole vehicle is matched with a driving power source for running to work, so that the system is more environment-friendly and achieves the purposes of energy conservation, emission reduction and energy recovery.
Therefore, compared with the prior art, the invention has outstanding substantive features and remarkable progress.
Drawings
The following describes details and operational principles of embodiments and examples of the present invention with reference to the drawings.
Fig. 1 is a control block diagram of a first embodiment of the present invention.
Fig. 2 is a corresponding oil circuit diagram of fig. 1.
Fig. 3 is a control block diagram of a second embodiment of the present invention.
Fig. 4 is a control block diagram of a third embodiment of the present invention.
Fig. 5 is an oil path diagram corresponding to fig. 4.
Fig. 6 is an oil circuit diagram corresponding to the third embodiment of the present invention.
In the figure: 1. an actuator; 2. a pressure unit; 3. a liquid storage tank; 4. an accumulator; 5. a hydraulic main path; 6. a hydraulic branch circuit; 7. an energy storage pressure sensor; 8. a pump; 9. a pressure maintaining electromagnetic valve; 10. a motor; 11. a brake solenoid valve; 12. a main path check valve; 13. a return line; 14. a pressure relief solenoid valve; 15. a self-checking check valve; 16. a line pressure sensor; 17. a liquid level sensor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
With reference to fig. 1-6, the electronic braking system of the present embodiment includes a pedal assembly, a controller, a pressure unit 2, and an actuator 1.
The pedal assembly is connected with the controller, the pedal assembly transmits signals to the controller, and the controller is a signal processing and command sending center of the brake system, generally comprises various control components and circuits, can be designed, programmed and manufactured according to requirements, and is a mature technology.
The pressure unit 2 comprises a liquid storage tank 3, an energy accumulator 4, a hydraulic main road 5 and a hydraulic branch road 6. The main hydraulic path 5 and the branch hydraulic path 6 are respectively provided with corresponding pipelines, the liquid storage tank 3 is used for containing brake fluid, the energy accumulator 4 is provided with an energy storage pressure sensor 7, and the liquid pressure of the energy accumulator 4 is monitored by the energy storage pressure sensor 7.
The liquid storage tank 3 is connected with the energy accumulator 4 through a hydraulic main path 5, and a pump 8 and a pressure maintaining electromagnetic valve 9 are connected in series on the hydraulic main path 5. The pump 8 is provided with a motor 10 (i.e., an oil pump 8 motor 10), and the pump 8 is driven by the motor 10 to operate so as to cooperate with the pumping of the brake fluid 8 in the reservoir 3 into the accumulator 4. The pressure maintaining electromagnetic valve 9 is controlled by the controller sending instructions. The pressure maintaining electromagnetic valve 9 enables the main hydraulic path 5 to be communicated with and blocked from the energy accumulator 4 by opening, connecting and disconnecting (namely cutting off), brake fluid can enter and exit from the energy accumulator 4 when the pressure maintaining electromagnetic valve is communicated, and the brake fluid cannot enter and exit from the energy accumulator after the pressure maintaining electromagnetic valve is blocked. More preferably, the pressure maintaining solenoid valve 9 is a one-way solenoid valve, so that the pressure maintaining solenoid valve 9 passes in a one-way direction when not opened (i.e., disconnected), and the brake fluid can enter the energy accumulator 4 through the pressure maintaining solenoid valve 9 and cannot pass in a reverse direction; the opening state (namely, connection) of the pressure maintaining electromagnetic valve 9 is bidirectional, and the pressure maintaining electromagnetic valve is opened during braking, so that the one-way electromagnetic valve is relatively more practical.
The main hydraulic path 5 between the pump 8 and the pressure maintaining solenoid valve 9 is correspondingly connected with the executing mechanisms 1 one by one through the hydraulic branch paths 6, the corresponding brake solenoid valves 11 are respectively arranged on the hydraulic branch paths 6, namely, each executing mechanism 1 is connected to the main hydraulic path 5 through the hydraulic branch paths 6 in a matching manner, each executing mechanism 1 is provided with a brake solenoid valve 11 to control on the hydraulic branch paths 6, the brake solenoid valves 11 are opened and connected and disconnected on the hydraulic branch paths 6, brake fluid on the corresponding hydraulic branch paths 6 can enter the executing mechanisms 1, and the executing mechanisms 1 are matched to brake.
The controller is also respectively connected with the motor 10, the energy storage pressure sensor 7, the pressure maintaining electromagnetic valve 9 and the brake electromagnetic valve 11. The controller is connected with the pedal assembly and other sensors to receive signals, sends on-off instructions to the electromagnetic valves and sends on-off instructions to the motor 10, and the controller also has the functions of fault diagnosis, prompt, fault code storage and the like.
The working principle is as follows: when the energy storage pressure sensor 7 monitors that the pressure of brake fluid in the energy storage 4 is lower than a set pressure, a signal is fed back to the controller, the controller controls the motor 10 to operate to enable the pressure maintaining electromagnetic valve 9 to open a passage (if the pressure maintaining electromagnetic valve 9 adopts a one-way electromagnetic valve, additional opening is not needed, and control is relatively convenient), the motor 10 drives the pump 8 to pump the brake fluid 8 in the fluid storage tank 3 out and supplement the brake fluid into the energy storage 4 after passing through the pressure maintaining electromagnetic valve 9, the brake fluid in the energy storage 4 is at the set pressure after being supplemented, after the energy storage 4 finishes supplementing the pressure, the energy storage 4 reaches the set pressure, after the controller receives the signal of the energy storage pressure sensor 7, the controller sends an instruction to enable the pressure maintaining electromagnetic valve 9 to disconnect a pipeline (if the pressure maintaining electromagnetic valve 9 adopts the one-way electromagnetic valve, the pressure maintaining electromagnetic valve 9 does not need to be controlled), and the motor 10 stops operating, therefore, the brake fluid pressure of the energy accumulator 4 can be ensured to be at the set pressure, the energy accumulator 4 is in an energy storage state, the energy can be stored, the energy can be timely responded, the brake can be carried out in a matched mode, and the brake is stable, timely, more practical and safer.
When the pedal assembly is operated (such as a pedal is stepped on) to brake, a signal of the pedal assembly is transmitted to the controller, the controller sends an instruction to the motor 10, the brake electromagnetic valve 11 and the pressure maintaining electromagnetic valve 9, the on-off and the pressure of the hydraulic main circuit 5 and the hydraulic branch circuit 6 are controlled through the on-off matching of the brake electromagnetic valve 11 and the pressure maintaining electromagnetic valve 9, and the speed reduction and the parking of the vehicle are realized through the matching of the control execution mechanism 1 and the brake; the pedal assembly is released, the controller receives a pedal assembly signal, the controller sends a command to the motor 10 to stop the motor 10, sends a command to the pressure maintaining solenoid valve 9 to be cut off (namely, disconnected), and sends a command to the brake solenoid valve 11 to be switched on, so that the brake fluid in the corresponding actuating mechanism 1 can flow back to the liquid storage tank 3 through the hydraulic branch circuit 6 and the hydraulic main circuit 5.
The following optimization or further explanation may be made on the basis of the above embodiment.
For example, referring to fig. 5, the main hydraulic main path 5 is further connected in series with a main path check valve 12, the main path check valve 12 is located between the hydraulic branch 6 and the pump 8 or the main path check valve 12 is located between the pump 8 and the reservoir 3, so that the brake fluid does not flow back to the reservoir 3 through the main path check valve 12, and does not flow back in the main hydraulic path 5, thereby preventing the speed of the brake fluid flowing back to the reservoir 3 from being influenced by the back flow through the pump 8 and the braking. The hydraulic branch 6 between each brake solenoid valve 11 and the corresponding actuator 1 is connected with a liquid return pipeline 13, each liquid return pipeline 13 is connected with the liquid storage tank 3, and the brake fluid after the brake of the actuator 1 is completed flows back to the liquid storage tank 3 through the liquid return pipeline 13. Wherein, each liquid return pipeline 13 is connected in series with a corresponding pressure relief solenoid valve 14, the pressure relief solenoid valves 14 are connected with a controller, the controller sends an on-off instruction to the pressure relief solenoid valves 14 to switch on or off the pressure relief solenoid valves 14, and whether pressure relief is carried out or not is matched, so that the execution mechanism 1 is controlled to brake the brake and the brake liquid after braking is returned to the liquid storage tank 3, wherein the pressure relief outlet of the pressure relief solenoid valve 14 is communicated with the liquid storage tank 3. When the pedal assembly is released (for example, the pedal is released), the controller receives a pedal assembly signal, the controller sends a command to cut off the brake solenoid valve 11, and sends a command to switch on the pressure relief solenoid valve 14, the brake fluid (namely, pressure oil) in the execution mechanism 1 quickly flows back to the liquid storage tank 3, and sends a command to switch off the pressure maintaining solenoid valve 9, in the process, the motor 10 stops running after the energy accumulator 4 can accumulate energy to reach the set pressure. Further optimized, wherein, with reference to fig. 4, the controller is further coupled with at least one of a wheel speed sensor, a vehicle body speed sensor and a vehicle longitudinal acceleration sensor; the wheel speed sensor, the vehicle body speed sensor and the vehicle longitudinal acceleration sensor transmit corresponding signals to the controller, so that the signals are more comprehensive, the controller sends instructions to perform corresponding alternate on-off control on the brake solenoid valve 11 and the pressure relief solenoid valve 14 on each hydraulic branch 6, the brake hydraulic pressure of each hydraulic branch 6 can be controlled independently and accurately, and the purpose of stable, rapid and safe braking is achieved. Usually, a wheel speed sensor is associated with each wheel, and a corresponding actuator 1 for braking is associated with each wheel. The brake electromagnetic valve 11 can be a one-way electromagnetic valve, can only pass through the hydraulic main road 5 when not started, and can pass through in two directions when opened; the pressure relief solenoid valve 14 can also be a one-way solenoid valve which can only pass towards the direction of the hydraulic branch 6 when not started and can pass in two ways after being opened; and a one-way electromagnetic valve is adopted, so that the leakage risk is low, and the control is relatively convenient.
Still additionally optimize, still even have the stand-by pump on the hydraulic pressure main road between hydraulic pressure branch road and the liquid storage pot, stand-by pump and 8 series connection settings or parallel arrangement of pump, stand-by pump are furnished with the stand-by motor, and the stand-by motor is used for driving the stand-by pump operation, and the stand-by motor couples with the controller, and the controller sends and stops the instruction for stand-by motor. The redundancy function is designed, when the pump 8 or the motor 10 breaks down, the controller sends an instruction to the standby motor, and the standby motor is started and stopped to control the standby pump to operate, so that the braking safety is ensured.
For another example, with reference to fig. 4, the controller is further coupled with at least one of a steering wheel position sensor, a steering wheel torque sensor, and a vehicle lateral acceleration sensor. The signals are more comprehensive, and more types of signals are fed back to the controller to be matched with braking; and the controller sends instructions to perform corresponding alternate on-off control on the brake solenoid valve 11 and the pressure relief solenoid valve 14 on each hydraulic branch 6, so that rapid and accurate braking can be realized.
Further optimization, with reference to fig. 6, each hydraulic branch 6 is respectively connected in series with a self-checking check valve 15, each self-checking check valve 15 is connected in series in front of the corresponding brake solenoid valve 11, and each hydraulic branch 6 passes through the self-checking check valve 15, so that the brake fluid passes through the brake solenoid valve 11 in one direction and cannot pass through the brake fluid in the reverse direction; a pipeline pressure sensor 16 is further provided, the pipeline pressure sensor 16 is arranged on the liquid return pipeline 13 or the hydraulic branch 6 between the brake solenoid valve 11, the pressure relief solenoid valve 14 and the actuator 1, namely, a part of the pipeline, so that the pressure in the part of the pipeline (namely, the pressure of the brake liquid) is monitored by the pipeline pressure sensor 16, the pipeline pressure sensor 16 is connected with the controller, and the pipeline pressure sensor 16 receives the pressure in the part of the pipeline and feeds the pressure back to the controller. When the controller detects that the vehicle is in an idle state, the controller performs leakage test on the part of pipelines corresponding to each executing mechanism 1 according to system setting; when the test is carried out, the test paper is put into a test,the controller sends instructions to the pressure maintaining electromagnetic valve 9 and/or the motor 10 Co-operationWhen the pressure of the brake fluid in the partial pipeline reaches a set value, the brake solenoid valves 11 are switched off, after a set test time, the pipeline pressure sensor 16 feeds a pressure signal back to the controller, and when the pressure drop (namely pressure loss) of the partial pipeline is unqualified, the system sends a warning signal to a driver, and simultaneously judges whether to close the partial pipeline according to the leakage amount, so that the brake solenoid valves 11 on the corresponding hydraulic branch circuits 6 are locked, and the corresponding actuating mechanisms 1 do not participate in braking; and (3) detecting the leakage of partial pipelines corresponding to other actuating mechanisms 1 according to the same program so as to find potential safety hazards in advance and ensure driving safety.
And the controller can be optimized, and is also connected with a whole vehicle ECU (namely a running computer of the automobile) by combining with the attached figure 3, the whole vehicle ECU is connected with a running driving power source, and the whole vehicle ECU controls the running driving power source to run. Wherein, the driving power source comprises an electric motor and/or a fuel engine. When the pedal assembly is operated, the pedal assembly transmits a signal to the controller, the controller sends a corresponding deceleration instruction to the ECU of the whole vehicle according to the pedal signal (such as setting related strength parameters), and when the deceleration effect of a driving power source (such as a motor or a fuel engine) reaches the requirement of a driver, the hydraulic brake (each electromagnetic valve) does not participate in the work, so that the purposes of energy conservation, emission reduction and energy recovery are achieved; when the deceleration effect of a driving power source (such as an electric motor or a fuel engine) cannot meet the braking requirement of a driver, the controller sends instructions to the motor 10 (namely the motor 10 of the oil pump 8) and each electromagnetic valve, brake fluid is supplied to the executing mechanism 1, and the executing mechanism 1 is matched with forced braking to realize hydraulic braking and achieve the purposes of decelerating and stopping the automobile. Is more environment-friendly and achieves the purpose of energy conservation and emission reduction energy recovery.
The actuating mechanism comprises a brake wheel cylinder and/or a brake caliper, and hydraulic braking can be performed in a matched mode after brake fluid is supplied. In addition, wherein brake caliper can select for use electronic caliper, when selecting for use electronic caliper, electronic caliper still will with the controller hookup to can give electronic caliper by the direct instruction of sending of controller, when hydraulic brake's effect can not satisfy driver's requirement or hydraulic brake breaks down, the controller will send the brake instruction to electronic caliper. Besides parking, the brake device can also play a role of redundant braking.
In an additional optimization, with reference to fig. 4, the controller is further connected with at least one of a radar, a camera, an infrared sensor and a distance sensor. The intelligent vehicle brake system has the advantages that more types of signals can be obtained through the radar, the camera, the infrared sensor, the distance sensor and the like on the vehicle body and fed back to the controller, the purpose of active braking can be achieved, when at least one of the radar, the camera, the infrared sensor and the distance sensor monitors corresponding signals, the signals are fed back to the controller, active braking is carried out in a matched mode, and braking can also be carried out in a matched mode without operating a pedal assembly.
In addition, the pedal assembly comprises at least one of a pedal pressure sensor, a position sensor, a speed sensor, a contact switch and a damper; the damper comprises at least one of a spring, a high polymer elastic material, liquid, gas, permanent magnet and electromagnetism. The reservoir 3 is provided with a level sensor 17 in order to obtain the amount of brake fluid in the reservoir 3.
In the present embodiment and the illustrated brake solenoid valve and pressure relief solenoid valve, other types of solenoid valves may be used without affecting the implementation of the present invention.
The foregoing is a preferred embodiment of the present invention, and it should be noted that the scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the scope of the invention as set forth in the claims.
Claims (10)
1. Electronic brake system, including footboard assembly, controller, pressure unit (2) and actuating mechanism (1), its characterized in that:
the pedal assembly is connected with the controller,
the pressure unit (2) comprises a liquid storage tank (3), an energy accumulator (4), a hydraulic main path (5) and a hydraulic branch path (6), the energy accumulator (4) is provided with an energy accumulation pressure sensor (7),
the liquid storage tank (3) is connected with the energy accumulator (4) through a hydraulic main path (5), a pump (8) and a pressure maintaining electromagnetic valve (9) are connected in series on the hydraulic main path (5), the pump (8) is provided with a motor (10),
the hydraulic main path (5) between the pump (8) and the pressure maintaining electromagnetic valve (9) is correspondingly connected with each actuating mechanism (1) one by one through each hydraulic branch (6),
each hydraulic branch (6) is respectively provided with a corresponding brake electromagnetic valve (11),
the controller is also respectively connected with the motor (10), the energy storage pressure sensor (7), the pressure maintaining electromagnetic valve (9) and the brake electromagnetic valve (11).
2. The electronic braking system of claim 1 wherein:
a main path one-way valve (12) is also connected in series on the hydraulic main path (5), the main path one-way valve (12) is positioned between the hydraulic branch path (6) and the pump (8) or the main path one-way valve (12) is positioned between the pump (8) and the liquid storage tank (3);
a hydraulic branch (6) between each brake electromagnetic valve (11) and the corresponding actuating mechanism (1) is respectively connected with a liquid return pipeline (13), each liquid return pipeline (13) is connected with a corresponding pressure relief electromagnetic valve (14) in series, the pressure relief electromagnetic valves (14) are connected with a controller, and each liquid return pipeline (13) is connected with a liquid storage tank (3);
at least one of a wheel speed sensor, a vehicle body speed sensor and a vehicle longitudinal acceleration sensor is also coupled to the controller.
3. The electronic braking system according to claim 1 or 2, characterized in that: the controller is also connected with at least one of a steering wheel position sensor, a steering wheel torsion sensor and a vehicle transverse acceleration sensor;
the brake electromagnetic valve (11) adopts a one-way electromagnetic valve.
4. The electronic braking system of claim 2, wherein: each hydraulic branch (6) is respectively connected with a self-checking one-way valve (15) in series, each self-checking one-way valve (15) is connected in front of the corresponding brake electromagnetic valve (11) in series, a liquid return pipeline (13) between each brake electromagnetic valve (11) and the corresponding pressure relief electromagnetic valve (14) or a pipeline pressure sensor (16) is arranged on each hydraulic branch (6) between each brake electromagnetic valve (11) and the actuating mechanism (1), and the pipeline pressure sensor (16) is connected with a controller;
the pressure relief solenoid valve (14) adopts a one-way solenoid valve.
5. The electronic braking system of claim 1, wherein: the controller is connected with the whole vehicle ECU, and the whole vehicle ECU is connected with a driving power source which comprises a motor and/or a fuel engine.
6. The electronic braking system of claim 1, wherein: the actuator (1) comprises a brake wheel cylinder and/or a brake caliper.
7. The electronic braking system of claim 6, wherein: the brake calipers adopt electronic calipers which are connected with a controller.
8. The electronic braking system of claim 1, 2 or 3, wherein: the controller is also coupled to at least one of the radar, the camera, the infrared sensor, and the distance sensor.
9. The electronic braking system of claim 1, wherein:
the pressure maintaining electromagnetic valve (9) adopts a one-way electromagnetic valve;
the pedal assembly comprises at least one of a pedal pressure sensor, a position sensor, a speed sensor, a contact switch and a damper;
the damper comprises at least one of a spring, a high polymer elastic material, liquid, gas, permanent magnet and electromagnetism.
10. The electronic braking system of claim 1, wherein:
the hydraulic main path between the hydraulic branch and the liquid storage tank is also connected with a standby pump, the standby pump and the pump are arranged in series or in parallel, the standby pump is provided with a standby motor, and the standby motor is connected with the controller.
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| CN202210184441.6A CN114604215A (en) | 2022-02-28 | 2022-02-28 | Electronic brake system |
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Application publication date: 20220610 |