CN214084200U - Integrated wire control brake system - Google Patents
Integrated wire control brake system Download PDFInfo
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- CN214084200U CN214084200U CN202021982063.9U CN202021982063U CN214084200U CN 214084200 U CN214084200 U CN 214084200U CN 202021982063 U CN202021982063 U CN 202021982063U CN 214084200 U CN214084200 U CN 214084200U
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Abstract
The utility model discloses an integrated form drive-by-wire braking system, include: the main pressure buildup assembly comprises a piston pressure buildup mechanism, a first main pressure oil path, a first redundant pressure oil path, a first pressure buildup solenoid valve and a first isolation solenoid valve; the redundant pressure building assembly comprises a first oil supply branch, a second oil supply branch, a first isolation branch, a second plunger pump, a liquid inlet electromagnetic valve of the first plunger pump, a liquid inlet electromagnetic valve of the second plunger pump, a first redundant isolation electromagnetic valve of the first plunger pump, a second redundant isolation electromagnetic valve of the second plunger pump, a main pressure sensor, a first wheel cylinder pressure sensor and a second wheel cylinder pressure sensor. The system architecture can realize an active voltage building function and a redundant voltage building function. The braking system is provided with two main pressure building loops, and two brake wheel cylinders can be independently controlled respectively, so that the safety and reliability of the braking system are improved.
Description
Technical Field
The utility model relates to a brake-by-wire system especially relates to an integrated form brake-by-wire system.
Background
With the rapid development of the internet and the continuous development of new energy technology, new energy automobiles and intelligent automobiles are rapidly developed, the wide application of new energy automobiles can relieve environmental pollution and energy crisis to a great extent, and the development of automobile intelligent technology is also promoted.
Meanwhile, the development of the automobile intelligent technology can promote the networking process of the automobile, so that the traffic jam is fundamentally solved, and the running safety of the automobile is improved.
With the continuous improvement of environmental awareness technologies in recent years, driving assistance systems such as AEB and ACC have been widely used in automobiles, and unmanned automobiles have also been rapidly developed.
However, both the driving assistance system and the unmanned vehicle are finally required to be realized through controlling the transverse and longitudinal movement of the vehicle, and the braking system as a core safety component plays the most important role.
At present, the most widely used integrated brake-by-wire system in new energy vehicles and intelligent vehicles is mainly an IPB system launched by Bosey corporation.
The system can meet most requirements of automobile electromotion and intellectualization. However, the following problems also exist:
1) the IPB has a complex structure and high manufacturing cost, and the components of the IPB comprise the pedal simulator, so that the IPB is suitable for being installed and used by passenger vehicles. But for special vehicles in some park driverless scenarios, such as sweepers, express delivery vehicles, etc., these vehicles are driverless vehicles, and no pedal simulator is needed.
2) The IPB is only a set of brake-by-wire system, and under the unmanned driving condition, if the IPB motor fails, the vehicle loses the braking capability, so that the requirement of redundant brake-by-wire in the unmanned driving scene cannot be met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integrated form drive-by-wire braking system to satisfy the demand of redundant drive-by-wire braking under the unmanned scene.
Therefore, the utility model provides an integrated form drive-by-wire braking system, press the subassembly and the redundant subassembly of building to press including liquid storage pot, owner, the owner builds the subassembly and includes: piston pressure buildup mechanism, by the first main pressure oil circuit of piston pressure buildup mechanism fuel feeding, the first redundant pressure oil circuit that connects in parallel with first main pressure oil circuit, the first pressure build-up solenoid valve that sets up on first main pressure oil circuit and the first isolation solenoid valve that sets up on first redundant pressure oil circuit, the redundant pressure build-up subassembly includes: a first oil supply branch, a first isolation branch connected in parallel with the first oil supply branch, a first plunger pump and a normally closed type liquid inlet electromagnetic valve which are arranged on the first oil supply branch, and a first redundant isolation electromagnetic valve which is arranged on the first isolation branch, the first redundant branch and the first isolation branch are intersected to the first redundant pressure oil path, the second oil supply branch is connected with a second isolation branch in parallel, a second plunger pump and a normally closed liquid inlet isolation valve are arranged on the second oil supply branch, and a second redundant isolation electromagnetic valve is arranged on the second isolation branch, the second oil supply branch and the second isolation branch are intersected to the second redundant pressure oil path, the main pressure buildup assembly further comprises a main pressure sensor for detecting the oil supply pressure of the piston pressure buildup mechanism, a first wheel cylinder pressure sensor for detecting the oil pressure of the first main pressure oil path, and a second wheel cylinder pressure sensor for detecting the oil pressure of the second main pressure oil path.
Further, the first plunger pump and the second plunger pump share a power source, and the power source comprises a redundant pressure building motor and a cam.
Further, the active pressure building mechanism comprises a main pressure building motor, a speed reducing and torque increasing mechanism, a ball screw and a brake master cylinder, wherein the screw is used for driving a piston of the brake master cylinder to move.
Further, the integrated brake-by-wire system further comprises a one-way valve connected with each wheel cylinder isolation electromagnetic valve in parallel, and the one-way valve is used for rapidly reducing the braking pressure of the wheel cylinders when the main pressure building assembly rapidly reduces the pressure.
The integrated line control brake system comprises a main pressure building component, a redundant pressure building component and a liquid storage tank, the framework can realize the active pressure building function and the redundant pressure building function, the brake system is provided with two main pressure building loops, and two brake wheel cylinders can be independently controlled respectively, so that the safety and reliability of the brake system are improved.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an architecture diagram of an integrated brake-by-wire system according to the present invention; and
fig. 2 is a flow chart of emergency braking of the redundant voltage build-up assembly after failure of the main voltage build-up assembly in the system shown in fig. 1.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 and 2 show some embodiments according to the invention. The following description will be given taking independent braking control of two brake cylinders as an example.
As shown in fig. 1, the integrated brake-by-wire system includes a main pressure buildup assembly 10, a redundant pressure buildup assembly 20, a wheel cylinder 30, and a reservoir tank 40.
The main pressure buildup assembly 10 includes a piston pressure buildup mechanism 11, a first main pressure oil path 12 supplied with oil by the piston pressure buildup mechanism, a first redundant pressure oil path 13 connected in parallel with the first main pressure oil path 12, a first pressure buildup solenoid valve 14 provided on the first main pressure oil path 12, and a first isolation solenoid valve 15 provided on the first redundant pressure oil path 13.
The main pressure buildup assembly 10 further includes a second main pressure oil path 16 supplied by the piston pressure buildup mechanism, a second redundant pressure oil path 17 connected in parallel with the second main pressure oil path 16, a second pressure buildup solenoid valve 18 provided on the second main pressure oil path 16, and a second isolation solenoid valve 19 provided on the second redundant pressure oil path 17.
The first line pressure oil passage 12 and the second line pressure oil passage 16 are connected to each other through an outlet of the master cylinder 104. The master pressure building assembly 10 further includes a first wheel cylinder pressure sensor 111 for detecting the oil pressure of the first master pressure oil passage 12, a second wheel cylinder pressure sensor 112 for detecting the oil pressure of the second master pressure oil passage 16, and a master pressure sensor 113 connected to an outlet port of the master cylinder 104 to detect the oil supply pressure.
The piston pressure buildup mechanism 11 comprises a main pressure buildup motor 101, a speed reduction and torque increase mechanism 102 (such as a planetary gear reducer), a ball screw mechanism 103 and a brake master cylinder 104, wherein when the main pressure buildup motor 11 acts, the screw is driven to move so as to drive a piston in the brake master cylinder 104 to move left and right.
The brake master cylinder 104 is communicated with a fluid infusion path 105, and a fluid infusion check valve 106 and a fluid inlet strainer 107 are arranged on the fluid infusion path 105.
The redundant pressure build-up assembly 20 comprises a first oil supply branch 21, a first isolation branch 22 connected with the first oil supply branch in parallel, a first plunger pump 23 arranged on the first oil supply branch 21, and a first redundant isolation solenoid valve 24 arranged on the first isolation branch 22, wherein one end of the first oil supply branch 21 and one end of the first isolation branch 22 are communicated with the liquid storage tank 50, and the other end of the first oil supply branch 21 and the other end of the first isolation branch 22 are intersected to the first redundant pressure oil path 13.
The redundant pressure build-up assembly 20 further comprises a second oil supply branch 25, a second isolation branch 26 connected with the second oil supply branch in parallel, a second plunger pump 27 arranged on the second oil supply branch 25, and a second redundant isolation solenoid valve 28 arranged on the second isolation branch 26, wherein one end of the second oil supply branch 25 and one end of the second isolation branch 26 are communicated with the liquid storage tank 50, and the other end of the second oil supply branch 25 and the other end of the second isolation branch 26 are communicated with the second redundant pressure oil path 17.
In order to adapt to an unmanned automobile which keeps a vehicle brake pedal and a main cylinder, a liquid inlet electromagnetic valve 29 is added. The intake solenoid valve 29 is normally closed and is provided in the pipe line on the inlet side of the first plunger pump 23. And another normally closed type intake solenoid valve 29' is added, provided on the intake side piping of the second plunger pump 27.
The liquid inlet electromagnetic valve has the following functions: the plunger pump sealing washer leaks when the during operation, but redundancy pressure building subassembly is designed and is only worked under the redundancy condition, and operating time is extremely limited, and the plunger pump leaks the quantity very little like this, but if the vehicle keeps vehicle brake pedal and master cylinder, when the driver can step on brake pedal, can produce brake pressure in the vehicle brake master cylinder, and high-pressure brake fluid can get into the plunger pump through plunger pump import check valve, can arouse the plunger pump sealing washer to leak equally, leaks the obvious increase like this.
The utility model discloses in, the feed liquor solenoid valve of normal close type is increased in plunger pump entry department, and the high pressure brake fluid of vehicle brake master cylinder has solved brake pedal and has remain the leakage problem of plunger pump on the vehicle like this in can't getting into the plunger pump.
The first plunger pump 23 and the second plunger pump 27 share a power source, which is constituted by a redundant pressure-building motor 201 and a cam 202 driven thereby. When the redundant pressure build-up motor acts, the liquid inlet solenoid valves 29 and 29' are opened, and the first plunger pump and the second plunger pump are driven by the cam at the same time to pump oil.
The utility model discloses in, the piston pressure building mechanism is used for promoting the motion of brake master cylinder piston, and the rethread is opened and is built the electromagnetism valve, closes the establishment that the isolation solenoid valve realized wheel brake pressure. On the basis, a redundant isolation solenoid valve is added to be connected with the isolation solenoid valve in series, so that when the isolation solenoid valve fails and cannot be closed, the redundant isolation solenoid valve is closed to guarantee normal braking.
The utility model discloses in, main brake circuit has added a redundancy that has redundancy pressure build pressure motor, cam, plunger pump and has built the pressure subassembly, like this when the in-process owner of traveling builds pressure subassembly and breaks down suddenly, thereby redundancy pressure subassembly can be built the pressure motor through the redundancy and rotate cam drive plunger pump and go into the brake pipe way with liquid pump and realize emergency braking.
The framework of the integrated brake-by-wire system can realize an active voltage building function and a redundant voltage building function.
After receiving the command of controlling the dynamic pressure by the wire, the rotating speed of the main voltage-building motor and the corresponding current are calculated according to the required brake pressure, and the rotating speed is controlled by controlling the current of the motor.
The output torque of the motor is reduced and increased in torque through a mechanical structure of a pinion and a bull gear, and then is converted into thrust for pushing a piston in a brake master cylinder to move through a ball screw. After the piston is pushed through the liquid inlet, the pressure-building electromagnetic valve is opened and the isolation electromagnetic valve is closed at the same time, so that the brake fluid is compressed, and the brake pressure is built.
And then judging whether the hydraulic pressure in the brake circuit detected by the main pressure sensor is normal or not, if so, finishing the pressure building instruction, and otherwise, starting redundant pressure building.
With reference to fig. 2, the implementation process of the redundant voltage build-up is as follows: in the process of active pressure building and braking, if the main pressure sensor detects that the hydraulic pressure in the brake circuit at the moment is low abnormally, the main brake system is judged to have a fault, the system closes the main pressure building motor in an emergency mode, closes the pressure building electromagnetic valve, opens the isolation electromagnetic valve, closes the redundant isolation electromagnetic valve, opens the liquid inlet electromagnetic valve, starts the redundant pressure building motor to drive the plunger pump through the cam, and presses the brake fluid into the brake wheel cylinder, so that emergency pressure building is completed, and emergency braking under the fault is achieved.
When the first wheel cylinder pressure sensor 111 detects a pressure abnormality, the first isolation solenoid valve 15 is closed to isolate the first brake wheel cylinder 30, and when the second wheel cylinder pressure sensor 112 detects a pressure abnormality, the second isolation solenoid valve 19 is closed to isolate the second brake wheel cylinder 30.
The brake system has the timely and accurate capacity of active pressure building and long-time pressure maintaining, and meanwhile, the design of the redundant brake system ensures that the reliability of the brake system is also ensured, so that the brake system is suitable for being applied to a new energy intelligent low-speed special vehicle brake system with relatively low requirement on energy recovery.
The brake system is provided with two main pressure-building loops, two brake wheel cylinders can be respectively and independently controlled, when one brake wheel cylinder fails, the brake wheel cylinder can be isolated, and the normal work of the other brake wheel cylinder is not influenced, so that the safety and reliability of the brake system are improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An integrated wire control brake system is characterized by comprising a liquid storage tank, a main pressure building component and a redundant pressure building component,
the main voltage building assembly comprises: a piston pressure buildup mechanism, a first main pressure oil path supplied by the piston pressure buildup mechanism, a first redundant pressure oil path connected in parallel with the first main pressure oil path, a first pressure buildup solenoid valve arranged on the first main pressure oil path, and a first isolation solenoid valve arranged on the first redundant pressure oil path,
the main pressure buildup assembly also comprises a second main pressure oil path which is supplied by the piston pressure buildup mechanism, a second redundant pressure oil path which is connected with the second main pressure oil path in parallel, a second pressure buildup electromagnetic valve which is arranged on the second main pressure oil path, and a second isolation electromagnetic valve which is arranged on the second redundant pressure oil path,
the redundant voltage building assembly comprises:
the first oil supply branch and a first isolation branch connected in parallel with the first oil supply branch, a first plunger pump and a normally closed type liquid inlet electromagnetic valve which are arranged on the first oil supply branch, and a first redundant isolation electromagnetic valve which is arranged on the first isolation branch, wherein the first oil supply branch and the first isolation branch are intersected to the first redundant pressure oil path,
a second oil supply branch, a second isolation branch connected in parallel with the second oil supply branch, a second plunger pump and a normally closed liquid inlet isolation valve arranged on the second oil supply branch, and a second redundant isolation electromagnetic valve arranged on the second isolation branch, wherein the second oil supply branch and the second isolation branch are converged to a second redundant pressure oil path,
the main pressure buildup assembly further comprises a main pressure sensor for detecting the oil supply pressure of the piston pressure buildup mechanism, a first wheel cylinder pressure sensor for detecting the oil pressure of the first main pressure oil path, and a second wheel cylinder pressure sensor for detecting the oil pressure of the second main pressure oil path.
2. The integrated brake-by-wire system of claim 1, wherein the first and second plunger pumps share a power source comprising redundant build-up motors and cams.
3. The integrated brake-by-wire system of claim 1, wherein the piston pressure buildup mechanism comprises a main pressure buildup motor, a speed reduction and torque increase mechanism, a ball screw, and a master cylinder, wherein the screw is used for driving a piston of the master cylinder to move.
4. The integrated brake-by-wire system according to claim 3, further comprising a check valve connected in parallel with each wheel cylinder isolation solenoid valve for rapidly reducing wheel cylinder brake pressure through the check valve when the pressure building assembly rapidly reduces pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021982063.9U CN214084200U (en) | 2020-09-11 | 2020-09-11 | Integrated wire control brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021982063.9U CN214084200U (en) | 2020-09-11 | 2020-09-11 | Integrated wire control brake system |
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| Publication Number | Publication Date |
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| CN214084200U true CN214084200U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021982063.9U Active CN214084200U (en) | 2020-09-11 | 2020-09-11 | Integrated wire control brake system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206477A1 (en) * | 2022-04-29 | 2023-11-02 | 华为技术有限公司 | Brake control module, hydraulic control module, brake system, and vehicle |
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2020
- 2020-09-11 CN CN202021982063.9U patent/CN214084200U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206477A1 (en) * | 2022-04-29 | 2023-11-02 | 华为技术有限公司 | Brake control module, hydraulic control module, brake system, and vehicle |
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