CN115303246A - Independent brake circuit of automatic driving automobile - Google Patents
Independent brake circuit of automatic driving automobile Download PDFInfo
- Publication number
- CN115303246A CN115303246A CN202110498823.1A CN202110498823A CN115303246A CN 115303246 A CN115303246 A CN 115303246A CN 202110498823 A CN202110498823 A CN 202110498823A CN 115303246 A CN115303246 A CN 115303246A
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- Prior art keywords
- valve
- normally
- electro
- proportional control
- communicated
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
Abstract
The invention belongs to the technical field of vehicle braking, and relates to an automobile multi-wheel independent braking circuit, which comprises a controller, a hydraulic oil source, a total normally-closed valve and a plurality of braking circuits, wherein the hydraulic oil source, the total normally-closed valve and the plurality of braking circuits are sequentially communicated; the brake circuit comprises a wheel rotating speed sensor, a first electro-hydraulic proportional control valve, a first normally-open valve, a one-way valve and a brake wheel cylinder, wherein the first electro-hydraulic proportional control valve, the first normally-open valve, the one-way valve and the brake wheel cylinder are sequentially communicated, the total normally-closed valve, the first electro-hydraulic proportional control valve, the first normally-open valve and the wheel rotating speed sensor are communicated with the controller, the first electro-hydraulic proportional control valve is communicated with the total normally-closed valve, independent and continuous proportional control and driving comfort are carried out on the brake wheel cylinder pressure of each wheel in real time through control of the electro-hydraulic proportional pressure control valve, and meanwhile, the safety and reliability of the brake system are improved by adopting a redundant circuit.
Description
Technical Field
The invention belongs to the technical field of vehicle braking, and particularly relates to an independent braking circuit of an automatic driving automobile.
Background
Vehicle brake pressure control is directly related to the quality of brake performance, especially to safety and comfort. At present, with the development of an electric control technology, more and more vehicles are equipped with functions such as an ABS and an ESP, and such systems are generally provided with an electric control unit and a high-speed switching valve on the basis of an original brake system, so as to control braking and prevent wheels from locking. However, the high-speed switch valve cannot realize accurate control of pressure, and the metal valve core impact noise exists in the high-speed opening process of the electromagnetic valve, so that the driving smoothness and comfort are not high in the vehicle braking process; the traditional vehicle brake system loop generally adopts two high-speed switch valves to respectively realize the brake control of front and rear axle wheels, and companies such as Boshi, mainland and the like have pioneered an electro-hydraulic brake system, such as IBooster and MK C1.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides an independent brake circuit of an automatic driving automobile, which performs independent and continuous proportional control and driving comfort on the pressure of a brake wheel cylinder of each wheel in real time by controlling an electro-hydraulic proportional pressure control valve, and simultaneously improves the safety and reliability of a brake system by adopting a redundant circuit.
The invention is realized by the following technical scheme:
a multi-wheel independent brake circuit of an automobile comprises a controller, a hydraulic oil source, a general normally closed valve and a plurality of brake circuits, wherein the hydraulic oil source, the general normally closed valve and the plurality of brake circuits are sequentially communicated;
the brake loop comprises a first electro-hydraulic proportional control valve, a first normally-open valve, a one-way valve, a brake wheel cylinder and a wheel speed sensor which are sequentially communicated, the total normally-closed valve, the first electro-hydraulic proportional control valve, the first normally-open valve and the wheel speed sensor are all communicated with the controller, and the first electro-hydraulic proportional control valve is communicated with the total normally-closed valve.
As a further description of the invention: the brake circuit further comprises a normally-closed valve, a second electro-hydraulic proportional control valve and a second normally-open valve which are sequentially communicated, the normally-closed valve is communicated with the main normally-closed valve, the second normally-open valve is communicated with the one-way valve, and the normally-closed valve, the second electro-hydraulic proportional control valve and the second normally-open valve are communicated with the controller.
As a further description of the invention: and the outlet of the first electro-hydraulic proportional control valve is communicated with a first pressure sensor, the outlet of the second electro-hydraulic proportional control valve is communicated with a second pressure sensor, and the first pressure sensor and the second pressure sensor are both electrically connected with the controller.
As a further description of the invention: the hydraulic control system further comprises a filter arranged between the hydraulic oil source and the normally-closed valve.
Compared with the prior art, the invention has the following beneficial technical effects:
1. when the brake circuit works, the wheel speed sensors collect the rotating speed of each wheel in real time, the collected rotating speed information is sent to the controller, the controller controls the position of a valve core of the first electro-hydraulic proportional control valve to regulate and control hydraulic oil passing through the first electro-hydraulic proportional control valve according to the vehicle speed in real time, the deceleration is accurately provided for the wheels, the total normally-closed valve is used for controlling whether the whole brake circuit works, the total normally-closed valve is opened after the power is turned on, the first normally-open valve is used for cutting off a branch circuit when the first electro-hydraulic proportional control valve breaks down, meanwhile, the brake circuits are independently arranged, different decelerations can be provided independently according to the rotating speed of each vehicle circuit, the brake pressure of each wheel is independently controlled, the deceleration is provided in real time according to the vehicle speed of each wheel, and the brake comfort, the safety, the control precision and the corresponding rapidity in the vehicle brake process are improved.
2. And each braking loop is provided with a redundant loop consisting of a normally-closed valve, a second electro-hydraulic proportional control valve and a second normally-opened valve, and when the first electro-hydraulic proportional control valve fails, the redundant loop brakes the wheels, so that the safety of the braking system is improved.
Drawings
Fig. 1 is a schematic view showing the connection of the components of the present invention.
Description of the reference numerals
1. A source of hydraulic oil; 2. a filter; 3. a normally closed valve; 41. a first electro-hydraulic proportional control valve; 42. a first normally open valve; 43. a first pressure sensor; 51. a second electro-hydraulic proportional control valve; 52. a second normally open valve; 53. a second pressure sensor; 54. normally opening the valve; 6. a one-way valve; 7. a brake wheel cylinder; 8. a wheel speed sensor; 9. and a controller.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
As shown in fig. 1, an automobile multi-wheel independent brake circuit comprises a controller 9, a hydraulic oil source 1, a general normally-closed valve 3 and a plurality of brake circuits which are sequentially communicated, wherein a filter 2 is communicated between the hydraulic oil source 1 and the general normally-closed valve 3; specifically, the controller 9 is an ECU (electronic control unit) 9, the hydraulic oil source 1 is an oil tank filled with hydraulic oil, the filter 2 is used for filtering impurities in the hydraulic oil, the total normally-closed valves 3 are normally-closed electromagnetic valves, and the number of the braking loops corresponds to the number of the wheels.
The braking loop comprises a wheel rotating speed sensor 8, a first electro-hydraulic proportional control valve 41, a first normally open valve 42, a check valve 6 and a brake wheel cylinder 7 which are sequentially communicated, a general normally closed valve 3, the first electro-hydraulic proportional control valve 41, the first normally open valve 42 and the wheel rotating speed sensor 8 are communicated with a controller 9, the wheel rotating speed sensor 8 is used for collecting the rotating speed of a wheel, and the first electro-hydraulic proportional control valve 41 is communicated with the general normally closed valve 3. Specifically, the first electro-hydraulic proportional control valve 41 and the first normally open valve 42 are set as solenoid valves, the wheel speed sensor 8 detects the wheel speed in real time and sends a wheel speed signal to the controller 9, meanwhile, the controller 9 receives signals such as a vehicle speed signal, a braking instruction, a braking deceleration, and a yaw rate of the vehicle in real time, and the controller 9 sends braking signals to the normally closed valve 3 and the first electro-hydraulic proportional control valve 41 and the first normally open valve 42.
The brake circuit further comprises a normally-closed valve 54, a second electro-hydraulic proportional control valve 51 and a second normally-open valve 52 which are communicated in sequence, wherein the normally-closed valve 54 is communicated with the main normally-closed valve 3, the second normally-open valve 52 is communicated with the check valve 6, and the normally-closed valve 54, the second electro-hydraulic proportional control valve 51 and the second normally-open valve 52 are communicated with the controller 9. Specifically, the normally-closed valve 54, the second electro-hydraulic proportional control valve 51, and the second normally-open valve 52 are provided as solenoid valves, and when the first electro-hydraulic proportional control valve 41 fails, the controller 9 transmits a brake signal to the normally-closed valve 54, the second electro-hydraulic proportional control valve 51, and the second normally-open valve 52, and transmits an off signal to the first normally-open solenoid valve.
The outlet of the first electro-hydraulic proportional control valve 41 is communicated with a first pressure sensor 43, the outlet of the second electro-hydraulic proportional control valve 51 is communicated with a second pressure sensor 53, and the first pressure sensor 43 and the second pressure sensor 53 are both electrically connected with the controller 9. Specifically, the first pressure sensor 43 is configured to detect a pressure at an oil outlet of the first electro-hydraulic proportional control valve 41, and similarly, the second pressure sensor 53 is configured to detect a pressure at an oil outlet of the second electro-hydraulic proportional control valve and send acquired pressure information to the controller 9 to determine whether the first electro-hydraulic proportional control valve 41 and the second electro-hydraulic proportional control valve 51 work normally.
During vehicle braking control, when a vehicle needs to be braked, the controller 9 determines the required braking deceleration according to the rotating speed of wheels of the vehicle, the vehicle speed and the current state of the vehicle, and sends a wheel pressure control instruction to the first electro-hydraulic proportional control valve 41 to control the position of a valve core of the first electro-hydraulic proportional control valve, an oil outlet of the first electro-hydraulic proportional control valve 41, the first normally-open valve 42, the one-way valve 6 and the brake wheel cylinder 7 are connected through pipelines, so that the accurate control of the wheel cylinder pressure is realized, and the stable deceleration of the wheels is further realized; when the system detects that the first electro-hydraulic proportional control valve 41 is blocked or has other faults (the first pressure sensor 43 collects the pressure at the oil outlet of the first electro-hydraulic proportional control valve 41, the pressure is not within a preset value and the fault occurs), the controller 9 sends control instructions to the first normally-open valve 42, the normally-closed valve 54 and the second normally-closed valve 52 respectively to enable the electromagnetic valves to be electrified, the first normally-open valve 42 is electrified to disconnect the original brake loop, the electromagnetic valves of the normally-closed valve 54 and the second normally-closed valve 52 are electrified, meanwhile, the controller 9 sends control instructions to the second electro-hydraulic proportional control valve 51 to connect the redundant loop, the accurate control of the wheel cylinder pressure is realized, and the stable deceleration of the wheel is further realized.
The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.
Claims (4)
1. The utility model provides an automobile multi-wheel independent brake circuit which characterized in that: the hydraulic brake system comprises a controller (9), a hydraulic oil source (1), a total normally-closed valve (3) and a plurality of brake circuits, wherein the hydraulic oil source, the total normally-closed valve and the brake circuits are sequentially communicated;
the brake circuit comprises a first electro-hydraulic proportional control valve (41), a first normally-open valve (42), a one-way valve (6), a brake wheel cylinder (7) and a wheel speed sensor (8), wherein the first electro-hydraulic proportional control valve (41), the first normally-open valve (42) and the wheel speed sensor (8) are communicated with the controller (9), and the first electro-hydraulic proportional control valve (41) is communicated with the normally-closed valve (3).
2. The automotive multi-wheel independent brake circuit of claim 1, characterized in that: the brake circuit further comprises a normally-closed valve (54), a second electro-hydraulic proportional control valve (51) and a second normally-open valve (52) which are sequentially communicated, the normally-closed valve (54) is communicated with the main normally-closed valve (3), the second normally-open valve (52) is communicated with the check valve (6), and the normally-closed valve (54), the second electro-hydraulic proportional control valve (51) and the second normally-open valve (52) are all communicated with the controller (9).
3. The automotive multi-wheel independent brake circuit according to claim 2, characterized in that: the outlet of the first electro-hydraulic proportional control valve (41) is communicated with a first pressure sensor (43), the outlet of the second electro-hydraulic proportional control valve (51) is communicated with a second pressure sensor (53), and the first pressure sensor (43) and the second pressure sensor (53) are electrically connected with the controller (9).
4. The automotive multi-wheel independent brake circuit of claim 1, characterized in that: the hydraulic control system is characterized by further comprising a filter (2) arranged between the hydraulic oil source (1) and the general normally-closed valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110498823.1A CN115303246A (en) | 2021-05-07 | 2021-05-07 | Independent brake circuit of automatic driving automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110498823.1A CN115303246A (en) | 2021-05-07 | 2021-05-07 | Independent brake circuit of automatic driving automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115303246A true CN115303246A (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110498823.1A Pending CN115303246A (en) | 2021-05-07 | 2021-05-07 | Independent brake circuit of automatic driving automobile |
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| Country | Link |
|---|---|
| CN (1) | CN115303246A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230198431A1 (en) * | 2021-12-17 | 2023-06-22 | Anpec Electronics Corporation | Brake control system of motor |
-
2021
- 2021-05-07 CN CN202110498823.1A patent/CN115303246A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230198431A1 (en) * | 2021-12-17 | 2023-06-22 | Anpec Electronics Corporation | Brake control system of motor |
| US11736044B2 (en) * | 2021-12-17 | 2023-08-22 | Anpec Electronics Corporation | Brake control system of motor |
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