CN113085816A - Redundant braking system - Google Patents
Redundant braking system Download PDFInfo
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- CN113085816A CN113085816A CN202110401841.3A CN202110401841A CN113085816A CN 113085816 A CN113085816 A CN 113085816A CN 202110401841 A CN202110401841 A CN 202110401841A CN 113085816 A CN113085816 A CN 113085816A
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- 238000004891 communication Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 43
- 230000001105 regulatory effect Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
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- 102100034112 Alkyldihydroxyacetonephosphate synthase, peroxisomal Human genes 0.000 description 1
- 101000799143 Homo sapiens Alkyldihydroxyacetonephosphate synthase, peroxisomal Proteins 0.000 description 1
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- 238000000848 angular dependent Auger electron spectroscopy Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
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- 239000010727 cylinder oil Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
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- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a redundant braking system, and belongs to the field of vehicle braking systems. The system is in communication with a service braking system and a wheel cylinder for operation in the event of a service braking system failure, the system comprising: the pressure building assembly comprises a liquid storage pool and a power unit, the main and auxiliary switching assembly comprises a plurality of brake valves, the brake valves switch the connection and disconnection of wheel cylinders and a main brake control circuit or the connection and disconnection of the wheel cylinders and a redundant brake control circuit, the anti-lock and auxiliary switching assembly comprises a plurality of pressure increasing valves, a plurality of pressure reducing valves and a return line, the pressure increasing valves control the connection and disconnection of the redundant brake control circuit, the pressure reducing valves control the connection and disconnection of the return line, the return line communicates the brake valves and an oil can, and the brake valves, the pressure increasing valves and the pressure reducing valves are controlled by a vehicle controller. The invention controls the on-off of the wheel cylinder and the main braking system and the on-off of the wheel cylinder and the output line through the main and redundant switching assembly, and can ensure the independent work of the main braking system and the redundant braking system.
Description
Technical Field
The invention belongs to the field of vehicle braking systems, and particularly relates to a redundant braking system.
Background
To meet the requirements of autodrive legislation, existing brake systems: a redundant brake system needs to be backed up for the brake systems of L3 and above, and in the case of failure of the main brake system, the redundant brake system is enabled to work to execute the command of the automatic driving system, and two solutions are mainly adopted.
The first scheme is that the redundant braking system shown in fig. 1 comprises a pressure building assembly 51, two isolating valves 101 and a pressure sensor 7, wherein the pressure building assembly 51 comprises a motor and two plunger pumps, the isolating valves 101 are provided with bypass one-way valves, the pressure building assembly 51 and the isolating valves 101 are connected in parallel, oil inlet ends of the pressure building assembly and the isolating valves are hydraulically connected with a main cylinder oil outlet of a main braking system 3, and oil outlet ends of the pressure building assembly and the isolating valves are hydraulically connected with a second isolating valve 101 of the main braking system 3. The working principle is as follows: when the main brake system is not in failure, the redundant brake system does not work, and oil liquid of the main cylinder flows through the isolating valve and then enters the main brake system; when the main brake system fails, the isolating valve 101 of the redundant brake system is electrified to isolate oil from the main brake system master cylinder, and the pressure building assembly 51 works to pump the oil from the main brake system 3 master cylinder into the main brake system 3, so that the pressure building brake is continuously carried out on the wheel cylinders.
The second solution is a hydraulic circuit as shown in fig. 1 comprising two pressure building blocks 51, two block valves 101, two first regulating valves 102, two second regulating valves 103, two reservoirs and three pressure sensors 7. The two isolating valves 101 are respectively connected in series in oil paths of the main brake system 3 and the two front wheels, the pressure building assembly 51 and the first regulating valve 102 are connected in series and then connected in parallel with the two second regulating valves 103, the front ends after being connected in parallel are connected with the rear end of the liquid storage tank, and the rear ends after being connected in parallel are connected with the rear ends of the isolating valves 101. The front end of the liquid storage tank is connected with an oil can of the main braking system 3. The working principle is as follows: when the main braking system is not failed, the redundant braking system does not work, and oil liquid of two oil outlets in the main braking system flows through the isolating valve 101 and then enters the wheel cylinder; when the main braking system fails, the isolating valve of the redundant braking system is electrified to isolate oil from the main braking system, the pressure building assembly works at the same time, and oil in the oil can is pumped into the wheel cylinder through the liquid storage tank and the first regulating valve 102, so that pressure building braking is continuously performed on the wheel cylinder, and in addition, anti-lock control and independent active pressure building of two front wheels can be realized through the redundant braking system.
This type of redundant braking system suffers from the following disadvantages: 1. after the main braking system 3 fails, only the assistance of two front wheels can be realized; 2. the pressure building unit 51 is connected in an oil way, so that the leakage risk of the main braking system 3 in normal work is increased; 3. when the redundant braking system is actively building pressure, the oil in the oil pot passes through the first regulating valve 102 at the oil suction end to form a cut-off effect, so that the rapid pressure building capability of the redundant braking system is influenced.
Therefore, the two schemes cannot realize independent anti-lock, active pressure build-up, brake assistance and anti-leakage control of the four wheels, and aiming at the two schemes, the two schemes need to realize the control at the same time, so that the defects of high cost, high leakage risk and low adjustment precision exist.
Disclosure of Invention
The purpose of the invention is as follows: a redundant braking system is provided to solve the above-mentioned problems of the prior art.
The technical scheme is as follows: a redundant braking system in communication with the primary braking system and the wheel cylinders for operating in the event of a failure of the primary braking system.
The redundant braking system includes: the pressure building assembly comprises a liquid storage pool and a power unit, the liquid storage pool is communicated with the oilcan, and the input end of the power unit is communicated with the liquid storage pool.
And the master-slave switching assembly comprises a plurality of brake valves, the brake valves switch the wheel cylinders to be communicated with a master brake control circuit or a redundant brake control circuit, the master brake control circuit refers to a passage for communicating the wheel cylinders with the master brake system, and the redundant brake control circuit refers to a passage for communicating the wheel cylinders with the output end of the power unit.
Anti-lock and stable control subassembly, including a plurality of pressure-increasing valves, a plurality of relief pressure valve and return circuit, pressure-increasing valve control the break-make of redundant braking control circuit, relief pressure valve control the break-make of return circuit, the return circuit intercommunication brake valve and oilcan.
And the brake valve, the pressure increasing valve and the pressure reducing valve are controlled by the automobile controller.
In a further embodiment, the brake valves are provided in one-to-one correspondence with the wheel cylinders.
In a further embodiment, the pressure increasing valves are arranged in one-to-one correspondence with the brake valves, and the pressure reducing valves are arranged in one-to-one correspondence with the brake valves.
In a further embodiment, the brake valve is a two-position, three-way solenoid valve, and the brake valve includes a first position communicating the wheel cylinder with the service brake system, and a second position communicating the wheel cylinder with the power unit.
In a further embodiment, the pressure building assembly further comprises a stopping unit, and the stopping unit is arranged between the pressure increasing valve and the oil can and used for controlling the on-off of the pressure increasing valve and the oil can.
In a further embodiment, the cut-off unit is communicated with the output end of the power unit and the input end of the liquid storage tank.
In a further embodiment, the shut-off unit is further arranged to control the output pressure of the pressure build-up assembly.
In a further embodiment, the redundant brake system further comprises a detection unit for detecting the pressure of at least one of said main brake control lines.
And the processing and analyzing unit is used for analyzing whether the brake valve generates leakage or not according to the detection result of the detection unit.
The automobile controller is configured to control the pressure increasing valve and/or the stopping unit to cut off a line where the pressure increasing valve and/or the stopping unit are located when the brake valve leaks.
In a further embodiment, the detection unit also detects a pressure of at least one of the service brake control lines.
The processing and analyzing unit is arranged to analyze whether the pressure increasing valve generates leakage or not according to the detection result of the detection unit and the signal of the main brake system.
The automobile controller is configured to control the cut-off unit to cut off a line thereof when the booster valve leaks.
In a further embodiment, the redundant brake system further comprises a detection unit for detecting the pressure of at least one of said main brake control lines.
And the processing and analyzing unit is used for analyzing whether the brake valve and the stopping unit generate leakage or not according to the detection result of the detection unit and the signal of the main brake system.
The automobile controller is configured to control the pressure increasing valve to cut off the line in which the pressure increasing valve is located when the brake valve and/or the cut-off unit leaks.
Has the advantages that: the invention discloses a braking system and a braking method, which realize independent pressure build-up/anti-lock/braking assistance/anti-leakage control of four wheels by arranging a main and redundant switching component, an anti-lock and stable control component and a pressure build-up component, and have the advantages of low cost, low leakage risk and high adjustment precision.
Drawings
Fig. 1 is a schematic diagram of a hydraulic circuit of a first prior art solution.
Fig. 2 is a schematic diagram of a hydraulic circuit of a second prior art solution.
Fig. 3 is a schematic diagram of the principle of the present invention.
The reference numerals shown in fig. 1 to 3 are: the braking system comprises a braking trigger device 1, a liquid storage device 2, a main braking system 3, an automobile controller 4, a redundant braking system 5, a braking valve 6, a pressure sensor 7, a pressure building assembly 51, a pressure distribution unit 52, a blocking valve 101, a first regulating valve 102, a second regulating valve 103, a right front wheel cylinder 201, a left front wheel cylinder 202, a left rear wheel cylinder 203, a right rear wheel cylinder 204, a liquid storage tank 511, a power unit 512, a blocking unit 513, a pressure increasing valve 521 and a pressure reducing valve 522.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
The embodiment of the invention discloses a redundant brake system, wherein a redundant brake system 5 is communicated with a main brake system 3 and a wheel cylinder and is used for working when the main brake system 3 fails.
The redundant brake system 5 includes: a pressure building component 51, a main and redundant switching component and an anti-lock and stable control component.
The pressure building assembly 51 comprises a liquid storage pool 511 and a power unit 512, wherein the liquid storage pool 511 is communicated with an oil pot, and the input end of the power unit 512 is communicated with the liquid storage pool 511.
Wherein the oil pot is the liquid storage device 2.
The power unit 512 includes at least an electric motor and at least one hydraulic pump, and the electric motor can drive at least one hydraulic pump for outputting pressure, and the embodiment shown in fig. 3 is that one electric motor drives two hydraulic pumps for outputting pressure.
The master-slave switching assembly of the embodiment of the invention comprises a plurality of brake valves 6, and the brake valves 6 switch the communication between the wheel cylinders and a master brake control circuit or a redundant brake control circuit, wherein the master brake control circuit refers to a passage for communicating the wheel cylinders with a master brake system, and the redundant brake control circuit refers to a passage for communicating the wheel cylinders with the output end of the power unit 512. .
The anti-lock and stable control assembly comprises a plurality of pressure increasing valves 521, a plurality of pressure reducing valves 522 and a return line, wherein the pressure increasing valves 521 control the on-off of the redundant brake control line, the pressure reducing valves 522 control the on-off of the return line, and the return line is communicated with the brake valves and the oil can.
The vehicle controller 4 (i.e., the ECU) according to the embodiment of the present invention controls the actions of the electrical elements of the redundant braking system, for example, the vehicle controller 4 controls the start/stop and the pressure output of the power unit 512, and the vehicle controller 4 also controls the actions of the valve assemblies such as the brake valve, the pressure increasing valve 521, and the pressure reducing valve 522.
In the present embodiment, the brake valve includes at least a service position for communicating the main brake system 3 with the wheel cylinders, and a direction change position for communicating the redundant brake system 5 with the wheel cylinders, and the brake valve 6 of the present embodiment is a two-position three-way electromagnetic valve as shown in fig. 3.
The booster valve 521 is a two-position, two-way solenoid valve including at least a common station for communicating the oil outlet end of the pressure building assembly 51 with the brake valve 6, and a reversing station for disconnecting the oil outlet end of the pressure building assembly 51 from the brake valve 6, as shown in fig. 3.
The pressure reducing valve 522 includes at least a normal station for disconnecting the oil outlet end of the pressure building assembly 51 from the brake valve 6, and a reversing station for communicating the oil outlet end of the pressure increasing valve 521 with the reservoir 2, and the pressure reducing valve 522 of the present embodiment is a two-position two-way solenoid valve as shown in fig. 3.
The embodiment of the invention adopts the pressure increasing and decreasing valve 522 to adjust the pressure of the wheel cylinder, so that the anti-lock control is more convenient, reliable and accurate.
The cut-off unit 513 is a common station at least including a station for communicating the oil outlet end of the pressure building assembly 51 with the liquid storage device 2 and a reversing station for disconnecting the oil outlet end of the pressure building assembly 51 from the liquid storage device 2, the cut-off unit 513 according to the embodiment shown in fig. 3 is a two-position two-way solenoid valve, and the cut-off unit 513 may be a pressure regulating valve capable of regulating pressure, such as a PCV control valve, and the pressure at the output end of the pressure building assembly 51 may be regulated by providing the PVC control valve.
The wheel cylinders include a front right wheel cylinder 201, a front left wheel cylinder 202, a rear left wheel cylinder 203, and a rear right wheel cylinder 204. At least one of the brake valve 6, the pressure increasing valve 521, the pressure reducing valve 522 and the cut-off unit 513 is provided, and as shown in fig. 3, in the present embodiment, four wheel cylinders are respectively provided with one brake valve, and therefore, four brake valves 6 are provided, and four pressure increasing valves 521 and four pressure reducing valves 522 corresponding thereto are respectively provided, and are respectively provided in one-to-one correspondence with the wheel cylinders.
In the embodiment, the pressure of the wheel cylinder is adjusted by adopting the pressure increasing valve and the pressure reducing valve, so that the ABS is controlled more conveniently, reliably and accurately.
In this embodiment, the power unit 512 is directly connected to the reservoir 511, and no valve assembly is disposed on the connection line, so as to reduce the effect of flow interception, thereby enhancing the rapid pressure building capability of the redundant braking system 5, making the power of the motor smaller, and further making the motor with lower power have smaller weight, thereby saving electric energy for the entire vehicle and increasing the endurance mileage.
The brake valves of the present embodiment are provided in one-to-one correspondence with the wheel cylinders, whereby individual control of each wheel cylinder, including independent pressure build control, antilock control, and the like, can be realized.
Further, in the present embodiment, the pressure increasing valves 521 are provided in one-to-one correspondence with the brake valves, and the pressure reducing valves 522 are provided in one-to-one correspondence with the brake valves.
Through the pressure distribution unit 52 connected with the pressure building component 51 and the brake valve 6, the four wheels can be independently controlled to realize anti-lock control and independent active pressure building, the pressure building component 51 directly connected with the liquid storage device 2 can ensure complete independence of the main brake system 3 and the redundant brake system 5, and when the main brake system 3 normally works, the action of the pressure output device can influence the oil path between the pressure output device and the pressure building component 51, so that the problem of oil leakage is avoided.
As shown in fig. 3, the brake valve according to the embodiment of the present invention is a two-position three-way electromagnetic valve, and includes a first position communicating a wheel cylinder with the service brake system 3, and a second position communicating the wheel cylinder with the redundant brake control line. Wherein the first position is a service station and the second position is a reversing station.
The pressure increasing valve 521 of the embodiment of the invention is a two-position two-way normally open valve, and the inlet and the outlet are communicated when the pressure increasing valve is at the normal position and are in a cut-off state when the pressure increasing valve is at the reversing station.
The pressure reducing valve 522 of the embodiment of the present invention is a two-position two-way normally closed valve, and the inlet and the outlet are not communicated when the valve is in the normal position, and are communicated when the valve is in the transposition position.
In a further embodiment, the pressure building assembly 51 further includes a stopping unit 513, and the stopping unit 513 is disposed between the pressure increasing valve 521 and the oil can and used for controlling on/off of the pressure increasing valve 521 and the oil can.
In the present embodiment, the cut-off unit 513 is connected to the output end of the power unit 512 and the input end of the reservoir 511.
In this embodiment, the cut-off unit 513 is further arranged to control the output pressure of the pressure build-up assembly 51.
In this embodiment, the cut-off unit 513 is a pressure regulating valve, and the vehicle controller 4 controls the on/off operation of the cut-off unit 513.
In a further embodiment, the redundant brake system 5 further comprises a detection unit for detecting the pressure of at least one main brake control line.
The redundant brake system 5 further comprises a process analysis unit arranged to analyze whether the brake valve is leaking based on the detection result of the detection unit and the signal of the main brake system.
The processing and analyzing unit is electrically connected with the detection unit and the main brake system processing unit, judges whether the oil leakage occurs in the redundant brake system 5 according to the pressure value detected by the detection unit and the signal of the main brake system, and controls the on-off action of the pressure increasing valve 521 and the stopping unit 513 according to the judgment result.
In the present embodiment, the vehicle controller 4 is configured to control the pressure increasing valve and/or the cut-off unit to cut off the line thereof when the brake valve leaks.
In the embodiment, the automobile controller is configured to control the cutoff unit to cut off the line thereof when the booster valve leaks.
In this embodiment, the redundant braking system 5 further includes an external control module connected to the vehicle controller 4, and configured to send detected external control information to the external control module, and the vehicle controller 4 controls the pressure building assembly 51 to output corresponding pressure according to the external controller information.
The detection unit of the embodiment of the invention comprises a plurality of pressure sensors 7, wherein the pressure sensors 7 arranged on at least one main brake control line can be included for monitoring the pressure condition of the main brake control line. Of course, a pressure sensor 7 may be included in at least one of the redundant brake control lines for monitoring the pressure conditions of the redundant brake control lines.
The pressure sensor 7 arranged on the active control line in the embodiment of the invention mainly has two functions, on one hand, in order to avoid that the brake operation of the driver cannot be fed back in time due to the failure of the main brake system, the pressure sensor 7 is used for detecting the pressure condition of the line and feeding back whether the driver executes the brake operation or not; on the other hand, the pressure sensor 7 may detect a pressure abnormality of the hydraulic line and determine whether or not the brake valve 6 is leaking.
In a further embodiment, the vehicle controller 4 is arranged to control the pressure increasing valve 521 and/or the cut-off unit 513 to cut off its line when the brake valve leaks.
The working process of the redundant braking system of the invention is as follows:
1. when the main brake system 3 is working normally, the main brake system 3 is used for building and realizing foundation braking, automatic emergency braking control, anti-lock control and vehicle body stability control for the wheel brake.
2. When the main braking system 3 fails, the braking valve 6 is switched to a reversing station, so that the redundant braking system 5 is communicated with the wheel brake, and the redundant braking system 5 is used for building basic assistance, automatic emergency braking control, anti-lock control, vehicle body stability control and leakage prevention control for the wheel brake.
Wherein:
1) the basic boost control of the redundant brake system 5 includes:
the automobile controller 4 controls the brake valve 6 to switch to the reversing station according to the information fed back by the pressure sensor 7, and controls the pressure building assembly 51 to output corresponding pressure, and at this time, the pressure increasing valve 521 and the pressure reducing valve 522 do not change positions. The specific method for performing braking detection and feedback according to the pressure sensor 7 may refer to an existing electrohydraulic servo brake, which is not described herein.
2) The automatic emergency braking control of the redundant braking system 5 comprises:
the automobile controller 4 controls the brake valve 6 to switch to the reversing station according to the external data information, and controls the pressure building assembly 51 to output corresponding pressure, and at this time, the pressure increasing valve 521 and the pressure reducing valve 522 do not change positions. The external data information includes, for example, deceleration or brake pressure signals sent from the ADAS, and the specific emergency brake control method may refer to the existing automobile emergency brake control method, which is not described herein again.
3) The anti-lock control of the redundant brake system 5 includes:
on the basis of basic assistance, the automobile controller 4 may control the pressure increasing valve 521 and the pressure reducing valve 522 connected to different wheel cylinders to increase pressure and reduce pressure so as to realize anti-lock control, which is specifically as follows:
when the pressure increasing valve 521 and the pressure reducing valve 522 are both in common stations, namely the pressure increasing valve 521 and the pressure reducing valve 522 are not in transposition, the corresponding wheel cylinders are pressurized.
When the pressure increasing valve 521 is at the reversing station and the pressure reducing valve 522 is at the common station, pressure is maintained for the corresponding wheel cylinder.
When the pressure increasing valve 521 and the pressure reducing valve 522 are both in the reversing position, the pressure is relieved for the corresponding wheel cylinder.
4) The vehicle body stability control of the redundant brake system 5 includes:
the automobile controller 4 controls the pressure building assembly 51 to output corresponding pressure according to the vehicle stability condition, the pressure increasing valve 521 matched with the wheel cylinder needing pressure building is located at a common station, and the rest pressure increasing valves 521 are located at reversing stations, so that the vehicle stability control is realized. The specific vehicle body stability control method may refer to an existing vehicle body stability control method, which is not described herein.
5) And (3) anti-leakage control of a brake valve:
in order to avoid the functional failure of the main brake system caused by the leakage of the brake valve 6, the detection unit detects the pressure of a main brake control line to judge whether the brake valve 6 leaks.
When the brake valve 6 is detected to leak, the automobile controller 4 controls the stopping unit 513 to switch to the reversing position to cut off the passage between the wheel cylinder and the oil tank, so as to prevent the oil in the wheel cylinder from leaking back to the liquid storage device 2 or the oil tank or the liquid storage pool 511.
Alternatively, the vehicle controller 4 may also control the pressure increasing valve 521 to switch to the cutoff position to cut off the passage of the wheel cylinder and the oil tank when the leakage of the brake valve 6 is detected.
Of course, as an alternative embodiment, the vehicle controller may also control the cutoff unit 513 and the pressure increase valve 521 to be simultaneously cut off to cut off the passage of the wheel cylinders and the oil tank when the leakage of the brake valve 6 is detected.
6) The cutoff unit leakage prevention control includes:
when the cut-off unit leakage is detected, the vehicle controller may control the pressure increasing valve 521 to be switched to the cut-off position to cut off the passage of the wheel cylinder and the oil tank.
Alternatively, when leakage is detected in both the brake valve 6 and the cut-off unit, the pressure increasing valve 521 is controlled to be switched to the cut-off position to cut off the passage between the wheel cylinder and the oil tank, thereby preventing oil in the wheel cylinder from leaking back to the reservoir device 2 or the oil tank.
The above 5) and 6) constitute a secondary protection measure capable of preventing the normal operation of the main brake system 3 from being abnormally performed due to the leakage of the brake valve 6 and/or the cut-off unit of the redundant brake system 5.
Of course, as an alternative embodiment, the detection unit of the present invention may also detect the pressure of the line in which the pressure increasing valve 521 is located; the processing and analyzing unit is arranged to analyze whether the pressure increasing valve 521 generates a leak or not based on the detection result of the detecting unit. When the leakage of the pressure increasing valve 521 is detected, the vehicle controller controls the cutoff unit to cut off the line in which the cutoff unit is located, so as to cut off the passage of the wheel cylinder and the oil tank.
The working principle of the redundant braking system of the invention is as follows:
each wheel brake is provided with a brake valve 6, the brake valve 6 is at least provided with three ports and two stations, one of the service stations is used for communicating the main brake system 3 with the wheel brakes, the reversing station is used for communicating the redundant brake system 5 with the wheel brakes, the redundant brake system 5 is disconnected with the main brake system 3 and the wheel brakes when the main brake system 3 is communicated with the wheel brakes, the main brake system 3 is disconnected with the redundant brake system 5 and the wheel brakes when the redundant brake system 5 is communicated with the wheel brakes, compared with the prior art, the independent communication mode can ensure the independent work of the main brake system 3 and the redundant brake system 5, when the main brake system 3 or the redundant brake system 5 works, the other brake module can not influence the working brake module, and the problem that the brake wheel cylinder in the prior art is simultaneously connected with the redundant brake system 5 and the main brake system 3 is solved, the main brake system 3 and the redundant brake system 5 cannot work independently.
And the brake valves 6 are used for connecting the wheel brakes with the main brake system 3 or the redundant brake system 5 independently, so that the leakage is not easy to occur compared with the prior art that the main brake system 3 and the redundant brake system 5 are connected by oil passages.
According to the embodiment of the invention, the brake valve 6 and the pressure distribution unit 52 can be configured for each wheel cylinder at the same time, and the backup of the basic boosting of four wheels, the automatic emergency brake control (AEB), the anti-lock brake control (ABS) and the vehicle body stability control (ESC) can be realized by establishing and compacting each wheel cylinder independently.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A redundant braking system, communicated with the main braking system and the wheel cylinder, and used for working when the main braking system fails;
it is characterized in that the preparation method is characterized in that,
the redundant braking system includes:
the pressure building assembly comprises a liquid storage pool and a power unit, the liquid storage pool is communicated with the oilcan, and the input end of the power unit is communicated with the liquid storage pool;
the main and redundant switching assembly comprises a plurality of brake valves, the brake valves switch the wheel cylinders to be communicated with a main brake control circuit or a redundant brake control circuit, the main brake control circuit refers to a passage for communicating the wheel cylinders with the main brake system, and the redundant brake control circuit refers to a passage for communicating the wheel cylinders with the output end of the power unit;
the anti-lock and stability control assembly comprises a plurality of pressure increasing valves, a plurality of pressure reducing valves and a return line, wherein the pressure increasing valves control the on-off of the redundant brake control line, the pressure reducing valves control the on-off of the return line, and the return line is communicated with the brake valves and the oilcan;
and the brake valve, the pressure increasing valve and the pressure reducing valve are controlled by the automobile controller.
2. The redundant braking system of claim 1,
the brake valves and the wheel cylinders are arranged in one-to-one correspondence.
3. The redundant braking system of claim 1,
the pressure increasing valves and the brake valves are arranged in a one-to-one correspondence mode, and the pressure reducing valves and the brake valves are arranged in a one-to-one correspondence mode.
4. The redundant braking system of claim 1,
the brake valve is a two-position three-way electromagnetic valve and comprises a first position communicated with the wheel cylinder and the main brake system and a second position communicated with the wheel cylinder and the power unit.
5. The redundant braking system of claim 1,
the pressure building assembly further comprises a stopping unit, wherein the stopping unit is arranged between the pressure increasing valve and the oil can and used for controlling the on-off of the pressure increasing valve and the oil can.
6. The redundant braking system of claim 5,
the stopping unit is communicated with the output end of the power unit and the input end of the liquid storage pool.
7. The redundant braking system of claim 6,
the shut-off unit is further arranged to control the output pressure of the pressure build-up assembly.
8. The redundant braking system of claim 1,
the detection unit is used for detecting the pressure of at least one main brake control line;
a process analyzing unit configured to analyze whether the brake valve generates a leak according to a detection result of the detecting unit;
the automobile controller is configured to control the pressure increasing valve and/or the stopping unit to cut off a line where the pressure increasing valve and/or the stopping unit are located when the brake valve leaks.
9. The redundant braking system of claim 8,
the detection unit is also used for detecting the pressure of at least one main brake control line;
the processing and analyzing unit is arranged to analyze whether the pressure increasing valve generates leakage or not according to the detection result of the detection unit and the signal of the main brake system;
the automobile controller is configured to control the cut-off unit to cut off a line thereof when the booster valve leaks.
10. The redundant braking system of claim 1,
the detection unit is used for detecting the pressure of at least one main brake control line;
a processing and analyzing unit which is set to analyze whether the brake valve and the stopping unit generate leakage according to the detection result of the detection unit and the signal of a main brake system;
the automobile controller is configured to control the pressure increasing valve to cut off the line in which the pressure increasing valve is located when the brake valve and/or the cut-off unit leaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401841.3A CN113085816A (en) | 2021-04-14 | 2021-04-14 | Redundant braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401841.3A CN113085816A (en) | 2021-04-14 | 2021-04-14 | Redundant braking system |
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| Publication Number | Publication Date |
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| CN113085816A true CN113085816A (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110401841.3A Withdrawn CN113085816A (en) | 2021-04-14 | 2021-04-14 | Redundant braking system |
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| CN (1) | CN113085816A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113442888A (en) * | 2021-08-11 | 2021-09-28 | 中汽创智科技有限公司 | Vehicle redundant braking system |
| CN115123162A (en) * | 2022-07-21 | 2022-09-30 | 中汽创智科技有限公司 | Vehicle braking system |
| CN115946672A (en) * | 2023-02-06 | 2023-04-11 | 清华大学 | Redundant braking system |
-
2021
- 2021-04-14 CN CN202110401841.3A patent/CN113085816A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113442888A (en) * | 2021-08-11 | 2021-09-28 | 中汽创智科技有限公司 | Vehicle redundant braking system |
| CN115123162A (en) * | 2022-07-21 | 2022-09-30 | 中汽创智科技有限公司 | Vehicle braking system |
| CN115123162B (en) * | 2022-07-21 | 2024-04-26 | 中汽创智科技有限公司 | Vehicle braking system |
| CN115946672A (en) * | 2023-02-06 | 2023-04-11 | 清华大学 | Redundant braking system |
| CN115946672B (en) * | 2023-02-06 | 2024-06-21 | 清华大学 | Redundant braking system |
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Application publication date: 20210709 |