CN113264022B - Braking system with redundancy function - Google Patents
Braking system with redundancy function Download PDFInfo
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- CN113264022B CN113264022B CN202110766240.2A CN202110766240A CN113264022B CN 113264022 B CN113264022 B CN 113264022B CN 202110766240 A CN202110766240 A CN 202110766240A CN 113264022 B CN113264022 B CN 113264022B
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- 239000007788 liquid Substances 0.000 claims abstract description 39
- 230000001105 regulatory effect Effects 0.000 claims description 98
- 239000012530 fluid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 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
- B60T13/10—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
- B60T13/14—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 accumulators or reservoirs fed by pumps
- B60T13/142—Systems with 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
- 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
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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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention discloses a braking system with a redundancy function, and belongs to the technical field of automobile braking. The braking system comprises a liquid storage tank, a wheel cylinder, a main braking unit and a redundant braking unit; the main brake unit comprises a main cylinder and a main pressure building module; the redundant braking unit comprises a redundant voltage building module; the main brake unit further comprises a first control valve, the first control valve has a first state and a second state, and when the first control valve is in the first state, the main pressure building module can deliver oil to the wheel cylinder; when the first control valve is in the second state, the redundant pressure building module can deliver oil to the wheel cylinder. Has the beneficial effects that: the oil circuit is simple and the processing cost is low.
Description
Technical Field
The invention relates to the technical field of automobile braking, in particular to a braking system with a redundancy function.
Background
With the advent of the autopilot law SAE J3016_201806, new requirements are put on the brake systems of L3 and above, namely that the brake systems of L3 and above need to backup a redundant brake unit in addition to their own main brake unit, and in case of brake failure of the main brake unit, the redundant brake unit needs to be able to brake normally to execute the instructions of the autopilot system.
At present, the braking system further comprises a wheel cylinder, the main braking unit comprises a main cylinder and a main pressure building module for building pressure, the redundant braking unit comprises a redundant pressure building module for building pressure, a two-position two-way electromagnetic valve is arranged in the main braking unit, the input end of the two-position two-way electromagnetic valve is connected to the main cylinder, the output end of the two-way electromagnetic valve is connected to the wheel cylinder, the output port of the main pressure building module and the output port of the redundant pressure building module at the same time, and the input end and the output end of the two-position two-way electromagnetic valve can be selectively connected or disconnected.
The two-position two-way electromagnetic valve only has two working states of connection or disconnection, so that the whole braking system can only realize the connection or disconnection of the main cylinder, the wheel cylinder, the output port of the main pressure building module and the output port of the redundant pressure building module through the two-position two-way electromagnetic valve, but the mutual connection state of the main pressure building module, the redundant pressure building module and the wheel cylinder cannot be realized.
In view of the above, it is desirable to design a brake system with redundant functions to solve the above problems.
Disclosure of Invention
The invention aims to provide a brake system with a redundancy function, which is simple in oil path, low in processing cost and high in assembly efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a brake system with redundant functionality comprising:
a liquid storage tank;
a wheel cylinder;
the main brake unit comprises a main cylinder and a main pressure building module, the liquid storage tank is used for supplying oil liquid to the main cylinder and the main pressure building module, and the main cylinder can convey the oil liquid to the wheel cylinder under the driving of a brake pedal;
the redundant brake unit comprises a redundant pressure building module, and the liquid storage tank is used for supplying oil liquid to the redundant pressure building module;
the main brake unit further includes a first control valve having a first state and a second state, the main pressure building module being capable of delivering oil to the wheel cylinder when the first control valve is in the first state; when the first control valve is in the second state, the redundant pressure building block can deliver oil to the wheel cylinder.
Preferably, the first control valve has a port P, a port A and a port B, the port P is connected with the output end of the master cylinder, the port A is connected with the output port of the main pressure building module, the port B is connected with the output port of the redundant pressure building module and the input end of the wheel cylinder, when the first control valve is in the first state, the port P is simultaneously disconnected with the port A and the port B, and the port A is communicated with the port B; when the first control valve is in the second state, the port P is communicated with the port B only, and the port A is disconnected from the port B.
Preferably, the service brake unit further includes:
the second control valve is connected between the port A and the output port of the main pressure building module, the input end of the second control valve is connected with the output port of the main pressure building module, and the output end of the second control valve is connected with the port A; the second control valve has an open state and a closed state, and when the second control valve is in the open state, the input end of the second control valve is communicated with the output end of the second control valve; when the second control valve is in the closed state, the input end of the second control valve is disconnected from the output end of the second control valve.
Preferably, the service brake unit further includes:
a first check valve connected between the master cylinder and the port P, the first check valve configured to only allow oil to flow from the master cylinder to the port P.
Preferably, the redundant brake unit further comprises:
the input end of the redundant control valve is connected with the output port of the redundant pressure building module, and when the first control valve is in the second state, the output end of the redundant control valve can convey oil to the wheel cylinder; the redundant control valve has an open state and a closed state, and when the redundant control valve is in the open state, the input end of the redundant control valve is communicated with the output end of the redundant control valve; when the redundant control valve is in the closed state, the input end of the redundant control valve is disconnected with the output end of the redundant control valve.
Preferably, the redundant brake unit further comprises:
redundant wheel end regulating valve group, the B mouth can carry fluid extremely redundant wheel end regulating valve group, redundant wheel end regulating valve group's input with the output of redundant control valve is connected, redundant wheel end regulating valve group's output is connected to the wheel cylinder to be used for the regulation to carry extremely the pressure of the fluid of wheel cylinder.
Preferably, the redundant wheel end regulator block comprises:
first redundant governing valve and second redundant governing valve, B mouth can carry fluid extremely first redundant governing valve, the input of first redundant governing valve can with the output of redundant control valve is connected, the output of first redundant governing valve respectively with the input of second redundant governing valve and the wheel cylinder is connected, the output of second redundant governing valve with the liquid storage pot is connected.
Preferably, the first redundant regulator valve is a pressure increasing valve and the second redundant regulator valve is a pressure reducing valve.
Preferably, the service brake unit further includes:
the main wheel end regulating valve group, the input of main wheel end regulating valve group with the B mouth is connected, the output of main wheel end regulating valve group is connected to the output of redundant control valve and the input of first redundant governing valve to the pressure that is used for adjusting the fluid of process.
Preferably, the main wheel end regulating valve group includes:
the input end of the first main regulating valve is connected with the port B, the output end of the first main regulating valve is respectively connected with the input end of the second main regulating valve, the input end of the first redundancy regulating valve and the output end of the redundancy control valve, and the output end of the second main regulating valve is connected with the liquid storage tank.
Preferably, the first main regulating valve is a pressure increasing valve and the second main regulating valve is a pressure reducing valve.
Preferably, the number of the redundant control valves and the number of the wheel cylinders are each provided in plurality, and the plurality of redundant control valves and the plurality of wheel cylinders are provided in one-to-one correspondence.
Preferably, the service brake unit further includes:
and one end of the main oil supply pipeline is connected with the liquid storage tank, the other end of the main oil supply pipeline is connected with the input port of the main pressure building module, a second one-way valve is arranged on the main oil supply pipeline, and the second one-way valve is configured to only allow oil to flow from the liquid storage tank to the input port of the main pressure building module.
Preferably, the redundant brake unit further comprises:
one end of the redundant oil supply pipeline is connected with the liquid storage tank, the other end of the redundant oil supply pipeline is connected with an input port of the redundant pressure building module, a third one-way valve is arranged on the redundant oil supply pipeline, and the third one-way valve is configured to only allow oil to flow to the input port of the redundant pressure building module from the liquid storage tank.
The invention has the beneficial effects that:
when the first control valve is in the first state, the main pressure building module builds pressure on the oil and transmits the oil to the wheel cylinder so as to brake the wheel cylinder to enter a main braking mode; when the first control valve is in the second state, the master cylinder is driven by the brake pedal to deliver oil to the wheel cylinder; meanwhile, the redundant pressure building module builds pressure on the oil and transmits the oil to the wheel cylinder so as to brake the wheel cylinder to enter a redundant braking mode; when the first control valve is in the second state and the main pressure building module and the redundant pressure building module cannot build pressure normally, the master cylinder is driven by the brake pedal to deliver oil to the wheel cylinder so as to brake the wheel cylinder and enter a backup braking mode; therefore, the main pressure building module, the redundant pressure building module and the wheel cylinder are communicated with each other, an oil way of the braking system does not need to be independently arranged, the oil way of the whole braking system is simple, the processing cost is low, and the assembling efficiency is high.
Drawings
Fig. 1 is a schematic structural diagram of a brake system with a redundancy function provided by the present invention.
In the figure:
10-a primary braking unit; 11-a master cylinder; 12-a main voltage building module; 13-a first control valve; 14-main wheel end regulating valve group; 141-a first main regulating valve; 142-a second main regulator valve; 15-a first one-way valve; 16-a second one-way valve; 17-a second control valve;
20-redundant brake units; 21-redundant voltage building modules; 22-redundant wheel end regulating valve group; 221-a first redundancy check valve; 222-a second redundant regulator valve; 23-redundant control valves; 24-a third one-way valve;
30-a liquid storage tank;
40-wheel cylinder.
Detailed Description
All of the features disclosed in this specification, or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving an equivalent or similar purpose, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. Like reference numerals refer to like elements throughout the specification.
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
The brake system comprises a wheel cylinder, a main brake unit and a redundant brake unit. The main brake unit comprises a main cylinder and a main pressure building module for building pressure; the redundant brake unit includes a redundant pressure build-up module for building up pressure. In the prior art, a two-position two-way electromagnetic valve is arranged in a main brake unit, the input end of the two-position two-way electromagnetic valve is connected to a main cylinder, the output end of the two-way electromagnetic valve is simultaneously connected to a wheel cylinder, the output port of a main pressure building module and the output port of a redundant pressure building module, and the input end and the output end of the two-position two-way electromagnetic valve can be selectively connected or disconnected; however, the two-position two-way solenoid valve only has two working states of connection or disconnection, so that the whole brake system can only connect or disconnect the main cylinder, the wheel cylinder, the output port of the main pressure building module and the output port of the redundant pressure building module through the two-position two-way solenoid valve, but the mutual connection state of the main pressure building module, the redundant pressure building module and the wheel cylinder cannot be realized.
In this regard, as shown in fig. 1, the present embodiment proposes a brake system with a redundancy function, which includes a reservoir 30, a wheel cylinder 40, a main brake unit 10, and a redundancy brake unit 20. The main brake unit 10 comprises a master cylinder 11 and a main pressure building module 12, the liquid storage tank 30 is used for supplying oil to the master cylinder 11 and the main pressure building module 12, and the master cylinder 11 can deliver the oil to the wheel cylinder 40 under the driving of a brake pedal; the redundant brake unit 20 comprises a redundant pressure building module 21, and the liquid storage tank 30 is used for supplying oil liquid to the redundant pressure building module 21; the service brake unit 10 further includes a first control valve 13, the first control valve 13 having a first state and a second state, the master pressure building block 12 being capable of delivering oil to the wheel cylinders 40 when the first control valve 13 is in the first state; when the first control valve 13 is in the second state, the redundant pressure buildup module 21 is able to deliver oil to the wheel cylinders 40. In this embodiment, the main brake unit 10 and the redundant brake unit 20 are of a split structure. In other embodiments, the primary brake unit 10 and the redundant brake unit 20 may be integrated. In this embodiment, the first control valve 13 is an electrically controlled two-position three-way valve. In other embodiments, the first control valve 13 may also be a valve set composed of two-position two-way valves, where one two-position two-way valve is used to control the connection and disconnection of the oil paths between the main pressure building module 12 and the wheel cylinders 40, and the other two-position two-way valve is used to control the connection and disconnection of the oil paths between the redundant pressure building module 21 and the wheel cylinders 40.
Compared with the prior art, the brake system with the redundancy function in the embodiment is additionally provided with the first control valve 13 to replace a two-position two-way electromagnetic valve and an oil way of the corresponding brake system in the prior art, so that when the first control valve 13 is in the first state, the main pressure building module 12 builds pressure on oil and conveys the oil to the wheel cylinder 40, so that the wheel cylinder 40 is braked to enter a main brake mode; when the first control valve 13 is in the second state, the master cylinder 11 is driven by the brake pedal to deliver the oil to the wheel cylinder 40; meanwhile, the redundant pressure building module 21 builds pressure on the oil and transmits the oil to the wheel cylinder 40 so as to brake the wheel cylinder 40 to enter a redundant braking mode; when the first control valve 13 is in the second state and neither the main pressure building module 12 nor the redundant pressure building module 21 can build pressure normally, the master cylinder 11 delivers oil to the wheel cylinders 40 under the driving of the brake pedal, so that the wheel cylinders 40 are braked to enter a backup brake mode; therefore, the communication state among the main pressure building module 12, the redundant pressure building module 21 and the wheel cylinder 40 is realized by controlling the communication relation among the port P, the port A and the port B of the first control valve 13, and an oil path of the brake system does not need to be separately arranged, so that the oil path of the whole brake system is simple, the processing cost is low, and the assembly efficiency is high.
When the first control valve 13 is in a first state, the port P is simultaneously disconnected with the port A and the port B, and the port A is communicated with the port B, so that the main pressure building module 12 can convey oil to the wheel cylinder 40; when the first control valve 13 is in the second state, the port P communicates only with the port B, and the ports a and B are disconnected, thereby enabling the redundant pressure buildup module 21 to deliver oil to the wheel cylinders 40.
Further, as shown in fig. 1, the main brake unit 10 further includes a second control valve 17, the second control valve 17 is connected between the port a and the output port of the main pressure building module 12, an input end of the second control valve 17 is connected to the output port of the main pressure building module 12, and an output end of the second control valve 17 is connected to the port a; the second control valve 17 has an open state and a closed state, when the second control valve 17 is in the open state, the input end of the second control valve 17 is communicated with the output end of the second control valve 17, and the oil at the output port of the main pressure building module 12 can be supplied to the port A by electrifying the second control valve 17, so that when the first control valve 13 is in the second state, the port A can deliver the oil to the wheel cylinder 40 through the port B; when the second control valve 17 is in the closed state, the input end of the second control valve 17 is disconnected from the output end of the second control valve 17, thereby blocking the supply of the oil between the output port of the main pressure building module 12 and the port a.
Specifically, as shown in fig. 1, the main brake unit 10 further includes a first check valve 15, the first check valve 15 being connected between the master cylinder 11 and the port P, the first check valve 15 being configured to allow oil to flow only from the master cylinder 11 to the port P. Further, the redundant brake unit 20 further includes a redundant control valve 23, an input end of the redundant control valve 23 is connected to an output port of the redundant pressure build-up module 21, and an output end of the redundant control valve 23 is capable of delivering the oil to the wheel cylinder 40 when the first control valve 13 is in the second state.
By arranging the first check valve 15 between the master cylinder 11 and the port P, the problem that when the first control valve 13 is in the second state and the output end of the redundant control valve 23 delivers oil to the wheel cylinder 40, the oil at the output end of the redundant control valve 23 flows back to the master cylinder 11 and cannot be delivered to the wheel cylinder 40 to cause incapability of braking can be avoided, so as to ensure the braking effect of the redundant braking unit 20. In other embodiments, the first check valve 15 may also be an electrically controlled two-position two-way valve. Specifically, the redundant control valve 23 has an open state and a closed state, when the redundant control valve 23 is in the open state, the input end of the redundant control valve 23 is communicated with the output end of the redundant control valve 23, and the oil liquid at the output port of the redundant pressure buildup module 21 can be delivered to the wheel cylinder 40 by energizing the redundant control valve 23; when the redundant control valve 23 is in the closed state, the input end of the redundant control valve 23 is disconnected from the output end of the redundant control valve 23, so that the oil supply between the output port of the redundant pressure buildup module 21 and the wheel cylinder 40 is cut off.
Further, as shown in fig. 1, the redundant brake unit 20 further includes a redundant wheel end regulating valve set 22, a port b can deliver oil to the redundant wheel end regulating valve set 22, an input end of the redundant wheel end regulating valve set 22 is connected with an output end of the redundant control valve 23, an output end of the redundant wheel end regulating valve set 22 is connected to the wheel cylinder 40, and the redundant wheel end regulating valve set 22 is used for regulating the pressure of the oil delivered to the wheel cylinder 40.
Specifically, as shown in fig. 1, the redundant wheel end regulating valve set 22 includes a first redundant regulating valve 221 and a second redundant regulating valve 222, a port b can deliver oil to the first redundant regulating valve 221, an input end of the first redundant regulating valve 221 can be connected with an output end of the redundant control valve 23, an output end of the first redundant regulating valve 221 is respectively connected with an input end of the second redundant regulating valve 222 and the wheel cylinder 40, and an output end of the second redundant regulating valve 222 is connected with the liquid storage tank 30.
The first redundancy regulating valve 221 and the second redundancy regulating valve 222 are both two-position two-way electric control valves, the first redundancy regulating valve 221 is a pressure increasing valve, and the second redundancy regulating valve 222 is a pressure reducing valve, so that the pressure of oil conveyed to the wheel cylinder 40 is regulated, and the ABS of the vehicle is controlled more conveniently, reliably and accurately.
Specifically, when not energized, the inlet and outlet of the first redundant regulator valve 221 are communicated, and the inlet and outlet of the second redundant regulator valve 222 are not communicated; when the power is on, the inlet and the outlet of the first redundancy adjusting valve 221 are not communicated, and the inlet and the outlet of the second redundancy adjusting valve 222 are communicated; when the first redundancy adjusting valve 221 is not energized, the second redundancy adjusting valve 222 is not energized to achieve the pressure increase of the wheel cylinder 40; when the first redundancy adjusting valve 221 is energized, the second redundancy adjusting valve 222 is not energized to realize the pressure maintaining of the wheel cylinder 40; when the first redundancy adjusting valve 221 is energized, the second redundancy adjusting valve 222 is energized to achieve the pressure reduction of the wheel cylinders 40.
The main braking unit and the redundant braking unit can share the same wheel end regulating valve group to regulate the pressure of oil liquid sent to the wheel cylinder, but when the wheel end regulating valve group fails, the main braking unit and the redundant braking unit cannot have the pressure regulating capacity of the wheel cylinder directly, so that the mutual independence between the main braking unit and the redundant braking unit is poor, the ABS redundancy function of a vehicle cannot be realized, and the redundancy function is incomplete.
In order to solve the above problem, as shown in fig. 1, the main brake unit 10 further includes a main wheel end regulating valve group 14, the main wheel end regulating valve group 14 is connected between the port B and the input end of the first redundancy regulating valve 221 and the output end of the redundancy control valve 23, the input end of the main wheel end regulating valve group 14 is connected to the port B, and the output end of the main wheel end regulating valve group 14 is connected to the output end of the redundancy control valve 23 and the input end of the first redundancy regulating valve 221, so as to regulate the pressure of the passing oil.
Through setting up two sets of wheel end governing valves of redundant wheel end governing valve group 22 and main wheel end governing valve group 14, can appear when failing in main wheel end governing valve group 14, redundant wheel end governing valve group 22 can carry out normal pressure adjustment effect to realized whole braking system's pressure regulation's redundant function, with the realization that can guarantee the ABS redundant function of whole car.
Specifically, as shown in fig. 1, the main wheel end regulating valve group 14 includes a first main regulating valve 141 and a second main regulating valve 142, an input end of the first main regulating valve 141 is connected to the port B, an output end of the first main regulating valve 141 is respectively connected to an input end of the second main regulating valve 142, an input end of the first redundancy regulating valve 221 and an output end of the redundancy control valve 23, and an output end of the second main regulating valve 142 is connected to the liquid storage tank 30.
The first main regulating valve 141 and the second main regulating valve 142 are two-position two-way solenoid valves, the first main regulating valve 141 is a pressure increasing valve, and the second main regulating valve 142 is a pressure reducing valve, so that the pressure of passing oil is regulated, and the ABS of the vehicle is controlled more conveniently, reliably and accurately. The operation principle and process of the first main regulating valve 141 and the second main regulating valve 142 are the same as the operation principle and process of the first redundant regulating valve 221 and the second redundant regulating valve 222, respectively, and therefore, detailed description thereof is omitted here.
Further, the number of the main wheel-end regulating valve group 14, the redundant wheel-end regulating valve group 22, the redundant control valve 23, and the wheel cylinder 40 is set to be plural; the input ends of the redundant control valves 23 are connected with the output ports of the redundant pressure building module 21, the output ends of the redundant control valves 23 are connected with the input ends of the redundant wheel end regulating valve groups 22 in a one-to-one correspondence manner, and the output ends of the redundant wheel end regulating valve groups 22 are connected with the input ends of the wheel cylinders 40 in a one-to-one correspondence manner; the input ends of the main wheel end regulating valve groups 14 are connected with the port B, and the output ends of the main wheel end regulating valve groups 14 are connected with the output ends of the redundant control valves 23 in a one-to-one correspondence manner and the input ends of the redundant wheel end regulating valve groups 22 in a one-to-one correspondence manner.
By correspondingly connecting a main wheel end regulating valve group 14, a redundant wheel end regulating valve group 22, a redundant control valve 23 and a wheel cylinder 40, even if the output end of a first main regulating valve 141 is directly connected with the input end of a first redundant regulating valve 221 so as to directly connect the redundant brake unit 20 into the main brake unit 10, the wheel cylinder 40 can be ensured to be only connected with one first main regulating valve 141 of the main brake unit 10, so that the main brake unit 10 and the redundant brake unit 20 have good mutual independence and can not influence each other; and the main brake unit 10 and any other redundant brake unit or the redundant brake unit 20 and any other main brake unit can be directly connected under the condition that the structures of the main brake unit 10 and the redundant brake unit 20 are not changed, so that the whole brake system can be suitable for any system, and the universality is better.
Meanwhile, the redundant control valves 23 are arranged between the output port of the redundant pressure building module 21 and the input end of each first redundant regulating valve 221, even if the output port of the redundant pressure building module 21 is connected between the first main regulating valve 141 and the first redundant regulating valve 221 of the main pressure building unit through the redundant control valves 23, independent control loops of the wheel cylinders 40 can be realized, so that the independent control loops cannot be influenced mutually, when one wheel cylinder 40 is detected to be leaked, the redundant control valve 23 connected with the leaked wheel cylinder 40 is closed to cut off the brake loop, so that the redundant brake unit 20 has a good leakage-proof function, the influence of the leaked wheel cylinder 40 on other normal wheel cylinders 40 is avoided, and the brake performance of the whole vehicle can be ensured; therefore, the full functional redundancy in the true sense is realized, and the safety and reliability of the whole braking system are ensured.
In the present embodiment, the number of the main wheel-end regulating valve groups 14, the number of the redundant wheel-end regulating valve groups 22, and the number of the redundant control valves 23 and the wheel cylinders 40 are four. In other embodiments, the number of main wheel-end regulating valve groups 14, the number of redundant wheel-end regulating valve groups 22, and the number of redundant control valves 23 and wheel cylinders 40 may be set to 8 or other values.
Further, the main brake unit 10 further includes a main oil supply pipeline, one end of the main oil supply pipeline is directly connected to the reservoir 30, the other end of the main oil supply pipeline is connected to the input port of the main pressure building module 12, and a second check valve 16 is disposed on the main oil supply pipeline, the second check valve 16 is configured to only allow oil to flow from the reservoir 30 to the input port of the main pressure building module 12, so as to avoid a problem that the oil at the input port of the main pressure building module 12 flows back into the reservoir 30 through the main oil supply pipeline and does not flow to the port a through the second control valve 17. In other embodiments, the second check valve 16 may also be an electrically controlled two-position two-way valve.
The main pressure building module 12 is directly connected with the liquid storage tank 30 through the main oil supply pipeline, namely, the second one-way valve 16 for preventing backflow is arranged on the main oil supply pipeline, and parts such as the main cylinder 11 or other electromagnetic valves are not arranged on the main oil supply pipeline, so that the interception effect of the main cylinder 11 or other electromagnetic valves on the oil liquid flowing out of the liquid storage tank 30 is reduced, and the quick pressure building capability of the main pressure building module 12 is enhanced on one hand; on the other hand, the required power of the main voltage building module 12 is smaller, and the weight of the main voltage building module 12 with low power is also smaller, so that the electric energy of the whole automobile can be saved, and the endurance mileage of the automobile can be improved.
Further, the redundant brake unit 20 further comprises a redundant oil supply pipeline, one end of the redundant oil supply pipeline is directly connected with the liquid storage tank 30, and the other end of the redundant oil supply pipeline is connected with an input port of the redundant pressure building module 21; and a third check valve 24 is arranged on the redundant oil supply pipeline, and the third check valve 24 is configured to only allow the oil to flow from the reservoir 30 to the input port of the redundant pressure building module 21, so as to avoid the problem that the oil at the input port of the redundant pressure building module 21 flows back to the reservoir 30 through the redundant oil supply pipeline and does not flow to the wheel cylinder 40 through the redundant control valve 23. In other embodiments, the third check valve 24 may also be an electrically controlled two-position two-way valve.
The redundant pressure building module 21 is directly connected with the liquid storage tank 30 through the redundant oil supply pipeline, namely, the third one-way valve 24 for preventing backflow is arranged on the redundant oil supply pipeline, and parts such as the main cylinder 11 or other electromagnetic valves are not arranged, so that the interception effect of the main cylinder 11 or other electromagnetic valves on oil flowing out of the liquid storage tank 30 is reduced, and the quick pressure building capability of the redundant pressure building module 21 is enhanced on the one hand; on the other hand, the required power of the redundant voltage building module 21 is smaller, and the weight of the low-power redundant voltage building module 21 is also smaller, so that the electric energy of the whole automobile can be saved, and the endurance mileage of the automobile can be improved.
Further, the redundant pressure building module 21 includes a first plunger pump, and the first plunger pump includes a first pump body and a first motor for driving the first pump body; the brake system further comprises a pressure sensor, wherein the pressure sensor is used for acquiring pressure information of a master cylinder 11 of the main brake unit 10; the redundant brake unit 20 further includes a first controller, the first controller is electrically connected to the first motor, and the first controller can control the first motor to operate according to the pressure information, so as to control the output pressure of the first pump body. The first controller in this embodiment is a common controller in the prior art, and therefore, the working principle thereof is not described in detail herein.
The output port of the redundant pressure building module 21 and the input port of the redundant pressure building module 21 are separately arranged on the first pump body, so that interference between oil inlet and outlet of the redundant pressure building module 21 and oil input can be avoided, mutual influence of the oil inlet and outlet and the oil input can be avoided, and the service life of the first pump body can be prolonged under the condition that requirements on the machining process and the material wear resistance of the first pump body are low.
Further, the main pressure building module 12 includes a second plunger pump, and the second plunger pump includes a second pump body and a second motor for driving the second pump body; the main brake unit 10 further includes a second controller, the second controller is electrically connected to the second motor, and the second controller controls the second motor to operate according to the pressure information of the pressure sensor, so as to control the output pressure of the second pump body.
Wherein, the delivery outlet of main pressure building module 12 and the input port of main pressure building module 12 separate the setting on the second pump body to can avoid redundant main pressure building module 12's fluid business turn over and produce the interference between the fluid input, make it can not influence each other, thereby can make the life of the second pump body higher under the lower circumstances of requirement to the processing technology and the material wearability of the second pump body.
By arranging the first controller in the redundant brake unit 20 and the second controller in the main brake unit 10, namely, by arranging two sets of controllers in the whole brake system, when any one of the first controller and the second controller is damaged, the other controller can normally realize the control function of the brake unit, thereby realizing the electric control redundant function and further ensuring that the redundant function is more comprehensive.
The braking principle of the main braking mode, the redundant braking mode and the backup braking mode of the braking system with the redundancy function in the embodiment is as follows:
a main braking mode: when the port P of the first control valve 13 is disconnected from the port a and the port B at the same time, and the port a is communicated with the port B, the second control valve 17 is powered on and is in an open state, the first motor of the redundant pressure building module 21 does not work, and the redundant control valve 23 is in a closed state: the second controller can control the second motor to act according to the pressure information so as to control the output pressure of the second pump body; the pressure output by the second pump body enters the wheel cylinder 40 through the second control valve 17, the port A, the port B, the first main regulating valve 141 and the first redundancy regulating valve 221, so that the wheel cylinder 40 is subjected to pressure building braking to perform main braking.
Redundant braking mode: when the port P of the first control valve 13 is communicated with the port B only, and the port a is disconnected from the port B, the second control valve 17 is powered off and is in a closed state, the second motor of the main voltage building module 12 is not operated, and the redundant control valve 23 is powered on and is in an open state: the master cylinder 11 is driven by a brake pedal to deliver oil to the wheel cylinder 40 through a port P, a port B, a first main regulating valve 141 and a first redundancy regulating valve 221; meanwhile, the first controller can control the first motor to act according to the pressure information so as to control the output pressure of the first pump body; the pressure output by the first pump body enters the wheel cylinder 40 through the redundancy control valve 23 and the first redundancy regulating valve 221, so that the wheel cylinder 40 is subjected to pressure building braking to perform redundancy braking; wherein, because the first check valve 15 is arranged, the oil liquid at the output port of the redundant pressure building module 21 can be prevented from flowing back to the liquid storage tank 30.
Backup braking mode: when the port P of the first control valve 13 is communicated with the port B only, and the port a is disconnected from the port B, the first motor does not work, the second controller 17 is powered off and is in a closed state, and the redundant controller 23 is powered off and is in a closed state: the master cylinder 11 is driven by the brake pedal to deliver oil to the wheel cylinders 40 through the ports P and B, the first main regulating valve 141 and the first redundancy regulating valve 221, so that the wheel cylinders 40 are subjected to pressure build braking to perform backup braking.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the present invention is limited to the details of the embodiment and the range of applications, which can be changed by those skilled in the art according to the spirit of the present invention.
Claims (13)
1. A brake system with redundant functionality comprising:
a liquid storage tank (30);
a wheel cylinder (40);
the main brake unit (10) comprises a master cylinder (11) and a main pressure building module (12), the liquid storage tank (30) is used for supplying oil to the master cylinder (11) and the main pressure building module (12), and the master cylinder (11) can deliver the oil to the wheel cylinders (40) under the driving of a brake pedal;
the redundant brake unit (20) comprises a redundant pressure building module (21), and the liquid storage tank (30) is used for supplying oil liquid to the redundant pressure building module (21);
characterized in that the service brake unit (10) further comprises a first control valve (13), the first control valve (13) having a first state and a second state, the service pressure building module (12) being capable of delivering oil to the wheel cylinder (40) when the first control valve (13) is in the first state; when the first control valve (13) is in the second state, the redundant pressure building module (21) can deliver oil to the wheel cylinder (40), and when the first control valve (13) is in the second state and the main pressure building module (12) and the redundant pressure building module (21) cannot build pressure normally, the master cylinder (11) delivers oil to the wheel cylinder (40) under the driving of the brake pedal;
the redundant brake unit (20) further comprises:
and the input end of the redundant control valve (23) is connected with the output port of the redundant pressure building module (21), and when the first control valve (13) is in the second state, the output end of the redundant control valve (23) can convey oil to the wheel cylinder (40).
2. The brake system with redundant function according to claim 1, wherein the first control valve (13) has a port P connected to the output of the master cylinder (11), a port a connected to the output of the master pressure building block (12), and a port B connected to the output of the redundant pressure building block (21) and the input of the wheel cylinder (40), and when the first control valve (13) is in the first state, the port P is simultaneously disconnected from the port a and the port B, and the port a is communicated with the port B; when the first control valve (13) is in the second state, the port P is communicated with the port B only, and the port A is disconnected from the port B.
3. The brake system with redundant function according to claim 2, wherein the service brake unit (10) further comprises:
the second control valve (17) is connected between the port A and the output port of the main pressure building module (12), the input end of the second control valve (17) is connected with the output port of the main pressure building module (12), and the output end of the second control valve (17) is connected with the port A; the second control valve (17) having an open state and a closed state, the input of the second control valve (17) being in communication with the output of the second control valve (17) when the second control valve (17) is in the open state; when the second control valve (17) is in the closed state, the input of the second control valve (17) is disconnected from the output of the second control valve (17).
4. The brake system with redundant function according to claim 2, wherein the service brake unit (10) further comprises:
a first check valve (15), the first check valve (15) connected between the master cylinder (11) and the port P, the first check valve (15) configured to allow oil to flow only from the master cylinder (11) to the port P.
5. The brake system with redundant function according to claim 2, wherein the redundant brake unit (20) further comprises:
redundant wheel end regulating valve group (22), the B mouth can carry fluid extremely redundant wheel end regulating valve group (22), the input of redundant wheel end regulating valve group (22) with the output of redundant control valve (23) is connected, the output of redundant wheel end regulating valve group (22) is connected to wheel cylinder (40) for the regulation is carried extremely the pressure of the fluid of wheel cylinder (40).
6. The brake system with redundant function according to claim 5, wherein the redundant wheel-end regulating valve block (22) includes:
the hydraulic control system comprises a first redundancy adjusting valve (221) and a second redundancy adjusting valve (222), wherein an opening B can convey oil to the first redundancy adjusting valve (221), the input end of the first redundancy adjusting valve (221) can be connected with the output end of a redundancy control valve (23), the output end of the first redundancy adjusting valve (221) is respectively connected with the input end of the second redundancy adjusting valve (222) and a wheel cylinder (40), and the output end of the second redundancy adjusting valve (222) is connected with a liquid storage tank (30).
7. The brake system with redundant function according to claim 6, wherein the first redundancy adjusting valve (221) is a pressure increasing valve, and the second redundancy adjusting valve (222) is a pressure reducing valve.
8. The brake system with redundant function according to claim 6, wherein the service brake unit (10) further comprises:
the main wheel end regulating valve group (14), the input of main wheel end regulating valve group (14) with the B mouth is connected, the output of main wheel end regulating valve group (14) is connected to the output of redundant control valve (23) and the input of first redundant governing valve (221) to the pressure that is used for adjusting the fluid of process.
9. The brake system with redundant functions according to claim 8, wherein the main wheel-end regulating valve block (14) includes:
the auxiliary device comprises a first main adjusting valve (141) and a second main adjusting valve (142), wherein the input end of the first main adjusting valve (141) is connected with the port B, the output end of the first main adjusting valve (141) is respectively connected with the input end of the second main adjusting valve (142), the input end of the first redundancy adjusting valve (221) and the output end of the redundancy control valve (23), and the output end of the second main adjusting valve (142) is connected with the liquid storage tank (30).
10. A braking system with redundant functions according to claim 9, characterized in that the first primary regulator valve (141) is a pressure increasing valve and the second primary regulator valve (142) is a pressure reducing valve.
11. The brake system with redundant function according to claim 1, wherein the number of the redundant control valves (23) and the number of the wheel cylinders (40) are each provided in plurality, and a plurality of the redundant control valves (23) and a plurality of the wheel cylinders (40) are provided in one-to-one correspondence.
12. The brake system with redundant function according to any one of claims 1 to 11, wherein the main brake unit (10) further comprises:
one end of the main oil supply pipeline is connected with the liquid storage tank (30), the other end of the main oil supply pipeline is connected with an input port of the main pressure building module (12), a second one-way valve (16) is arranged on the main oil supply pipeline, and the second one-way valve (16) is configured to only allow oil to flow from the liquid storage tank (30) to the input port of the main pressure building module (12).
13. The brake system with redundant function according to any one of claims 1 to 11, wherein the redundant brake unit (20) further comprises:
redundant oil supply pipeline, its one end with liquid storage pot (30) are connected, the other end with the input port of redundant pressure building module (21) is connected, just be provided with third check valve (24) on the redundant oil supply pipeline, third check valve (24) are configured as and only allow fluid by liquid storage pot (30) flow direction the input port of redundant pressure building module (21).
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| CN202110766240.2A CN113264022B (en) | 2021-07-07 | 2021-07-07 | Braking system with redundancy function |
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| CN202110766240.2A CN113264022B (en) | 2021-07-07 | 2021-07-07 | Braking system with redundancy function |
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| CN113753007A (en) * | 2021-09-17 | 2021-12-07 | 中汽创智科技有限公司 | Redundant braking system |
| CN113665555A (en) * | 2021-09-24 | 2021-11-19 | 中国第一汽车股份有限公司 | Redundant braking system and vehicle |
| CN115158263A (en) * | 2022-07-26 | 2022-10-11 | 中汽创智科技有限公司 | Braking control method and device of braking system and electronic equipment |
| CN118107535A (en) * | 2022-11-30 | 2024-05-31 | 比亚迪汽车工业有限公司 | Vehicle braking system and vehicle with same |
| CN118182420A (en) * | 2024-05-17 | 2024-06-14 | 千顾汽车科技(江苏)有限公司 | Electronic braking system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3427358A1 (en) * | 1984-07-25 | 1986-02-06 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD FOR REPORTING FAULTS IN BRAKING SYSTEMS AND BRAKING SYSTEM WORKING THIS METHOD |
| DE102017000472A1 (en) * | 2017-01-19 | 2018-07-19 | Lucas Automotive Gmbh | Hydraulic vehicle brake system and method for operating and testing the same |
| CN106915343B (en) * | 2017-04-13 | 2018-04-13 | 吉林大学 | Integrated pair master cylinder line traffic control brake fluid system |
| US10479335B2 (en) * | 2017-12-22 | 2019-11-19 | Robert Bosch Gmbh | Vehicle braking system with ABS emulation |
| CN108216174B (en) * | 2018-03-09 | 2023-07-28 | 吉林大学 | Redundant dual active supercharging braking system |
| CN112776769B (en) * | 2019-11-08 | 2022-11-11 | 比亚迪股份有限公司 | Vehicle brake system and control method thereof |
| CN111284465A (en) * | 2020-04-22 | 2020-06-16 | 芜湖伯特利电子控制系统有限公司 | Braking system suitable for automatic driving and control method |
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