CN209022904U - A kind of electronic hydraulic brake system with dual failures protection - Google Patents
A kind of electronic hydraulic brake system with dual failures protection Download PDFInfo
- Publication number
- CN209022904U CN209022904U CN201821751632.1U CN201821751632U CN209022904U CN 209022904 U CN209022904 U CN 209022904U CN 201821751632 U CN201821751632 U CN 201821751632U CN 209022904 U CN209022904 U CN 209022904U
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- master cylinder
- push plate
- brake
- pedal
- valve
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A kind of electronic hydraulic brake system with dual failures protection of the utility model includes electronic control unit ECU, brake pedal, battery, secondary master cylinder, automatically controlled linear moving module, mode converter device, master cylinder, ABS/ESP module, make-up valve, decoupling valve, hydraulic force snesor, pedal displacement sensor and pedal simulator.The utility model, only with two two-position two-way solenoid valves, reduces the quantity of brake piping, improves the sensitivity of braking response in brake hydraulic line；And it is added to a set of mode changeover mechanism in the entire system, the mechanism can rapid conversion between hydraulic backup mode and mechanical backup mode, and fast response time, the brake pressure when being guaranteed at each backup mode are guaranteed, security performance greatly promotes.The utility model has the characteristics that quick response, accurate control brake fluid pressure, while the system has dual failures protected mode, there is very high safety and reliability.
Description
Technical field
The utility model belongs to automobile brake technical field more particularly to a kind of electro-hydraulic with dual failures protection
Braking system.
Background technique
Motorized and intelligence are two trend of development of automobile now.And important set of the brake system of car as automobile
At one of part, the requirement with people to braking ability is higher and higher, is also slowly developed by pervious pure mechanic structure and is stayed
Vehicle is intelligent, to promote braking ability.Therefore, because original braking system mentions braking ability in terms of structure and principle
The limitation risen, automobile line control brake system (Brake-By-WireSystem, BBW) grow up in this background.
Electronic hydraulic brake system (Electro-Hydraulic BrakeSystem, EHB) is a kind of shape of automobile line traffic control
Formula, remains traditional hydraulic braking function, and reliability is relatively preferable；Meanwhile as a kind of new braking system, it will be traditional
Some mechanical element in braking system is substituted with electronic component, compensates for the shortcoming of traditional design and principle, can be with
Automobile brake perfrmance is improved to the utmost.But due to braking process be by ECU control motor rotation, once it is electric in driving process
Machine or mechanical transmission component break down, it will security risk occur.
206633997 U of Chinese patent Authorization Notice No. CN discloses " a kind of electronic hydraulic brake system ", which exists
Three solenoid valves, a respectively two position two-way valve, a two position three-way valve and a two-position four-way are used in fluid pressure line
The quantity of valve, valve is more, and hydraulic brake line connection is complicated, if hydraulic system failure, repairs more troublesome；And
And it is compared to two-port valve, the structure and control of triple valve and four-way valve are all more complicated compared with two-port valve, and triple valve is mostly slide valve,
Spool quality is larger, limits its response speed.
104309599 A of Chinese patent Authorization Notice No. CN discloses " a kind of electronic hydraulic brake system ", which exists
Simplification is made that in the arrangement of fluid pressure line and valve, but when its hydraulic backup mode, brake fluid, which enters master cylinder ante-chamber, to be pushed away
Dynamic master cylinder first piston, since master cylinder first piston is connected with gear and rack teeth mechanism, brake fluid pushes braking
Before master cylinder first piston, the frictional force for needing that gear and rack teeth mechanism is overcome to rotate, therefore response speed substantially reduces, and brake pressure
May be insufficient, reduce the safety of running car.
103754210 A of Chinese patent Authorization Notice No. CN discloses a kind of " motor-driven electro-hydraulic brake system
System " ensure that although using breakaway-element structure in the system between rack gear and master cylinder first piston in hydraulic backup mode
Under response speed and safety, if but fluid pressure line break down, response speed and brake fluid under mechanical backup mode
Pressure is a new problem to be solved again.
The utility model has only used two two-position two-way solenoid valves in brake hydraulic line, reduces the number of brake piping
Amount, improves the sensitivity of braking response；And it is added to a set of mode changeover mechanism in the entire system, which adds
Enter, it is ensured that can rapid conversion between hydraulic backup mode and mechanical backup mode, and be guaranteed at each backup mode
When fast response time, brake pressure be guaranteed, security performance greatly promotes.
Summary of the invention
In view of problem above, the purpose of this utility model is to provide a kind of electro-hydraulic systems with dual failures protection
Dynamic system, which, which has, improves response speed, and in case of a fault, can rapidly be transformed into hydraulic backup mode
Or mechanical backup mode.
A kind of electronic hydraulic brake system of the utility model includes electronic control unit ECU, brake pedal, battery, secondary master cylinder
Piston, secondary master cylinder, automatically controlled linear moving module, mode conversion device, master cylinder ante-chamber, master cylinder first piston, system
Dynamic the first working chamber of master cylinder, fluid reservoir, master cylinder second piston, the second working chamber of master cylinder, master cylinder, ABS/ESP
Module, make-up valve, decoupling valve, hydraulic force snesor, pedal displacement sensor, pedal simulator and throttle valve.
Electronic control unit ECU calculates required total brake force according to displacement signal, further according to power motor, the shape of battery
State calculates regenerative braking force, and total brake force, which subtracts regenerative braking force, can be obtained the brake force generated needed for braking system；Electricity
Control linear moving module includes rotating electric machine and motion transforming unit, motion transforming unit include bevel gear engagement transmission mechanism and
The rotary motion of power motor is converted into rack and pinion engagement by rack and pinion engagement transmission mechanism, bevel gear engagement transmission mechanism
The linear motion of transmission mechanism, then pushes master cylinder first piston to start to work by mode conversion device, and ECU passes through position
Shifting signal realizes the control to power motor, and by the rotary motion of power motor be converted into the linear motion of master cylinder piston from
And brake pressure is controlled；Mode conversion device includes rotating electric machine, splined shaft, hub splines and axle sleeve active push plate,
When all breaking down for normal brake mode and hydraulic backup mode, conversion to mechanical backup mode rapidly.Fluid reservoir is used for
Oil liquid in storage and recycling hydraulic tube.
ABS/ESP module is made of four two-position two-way solenoid valves, for adjusting the hydraulic braking force of each wheel cylinder；Pedal
Displacement sensor, for pedal displacement information and be fed back to ECU；Secondary master cylinder a, wherein branch and pedal are simulated
Device inlet is connected, and is simulated when normal brake application for pedal sense, and when hydraulic backup mode is directly used in braking；Master cylinder packet
The second working chamber of master cylinder ante-chamber, the first working chamber of master cylinder and master cylinder is included, for will be from the mechanical energy of pedal
It is converted into hydraulic energy；Throttle valve is located on pedal simulator export pipeline, can control different opening sizes, for simulating
Damping with different feelings.
Decoupling valve is arranged on the pipeline between master cylinder ante-chamber and secondary master cylinder, which is bi-bit bi-pass normally open valve,
The valve is closed when normal brake application, is directly used in braking under failure mode；Make-up valve be arranged in fluid reservoir and master cylinder ante-chamber it
Between fluid pressure line on, which is bi-bit bi-pass normally close valve, and for supplementing brake fluid when normal brake application, the valve is closed under failure mode
It closes, prevents brake pressure insufficient.Pedal simulator is arranged between the fluid pressure line between secondary master cylinder and master cylinder ante-chamber,
It is simulated for pedal sense；Hydraulic coupling sensor arrangement is on the pipeline between secondary master cylinder and pedal simulator, for judging
The braking intention of driver.
Secondly, fault diagnosis system is connected with electronic control unit unit ECU, when some brake parts breaks down nothing
Fault message can be passed to electronic control unit ECU when working normally by method；Fault diagnosis system be diagnosed to be braking system some
When place is broken down, alarm activation, and driver is reminded at the first time.
By adopting the above scheme, the utility model has the following advantages that.
1. solenoid valve usage quantity is few, hydraulic plumbing system connection is simple, fast response time and easy to repair, and does not lose
Decoupling and backup functionality save cost, economical and practical.
2. the breakaway-element structure between push plate and push plate, ensure that in hydraulic backup mode, do not need to overcome gear teeth
Frictional force between item greatly promotes response speed, brake pressure is guaranteed.
3. the addition of mode conversion device so that the conversion speed between each mode increases, and is in mechanical backup mode
When pushing master cylinder first piston, also there is no the frictional force that overcome between rack-and-pinion, guarantee brake pressure
It is sufficient.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is mode conversion device schematic diagram.
Label in attached drawing indicates:
1- electronic control unit ECU；2- battery；3- power motor；4- bevel gear pair；5- gear；6- rack gear；7- rotating electric machine；
8- rack gear active push plate；The driven push plate of 9- rack gear；10- splined shaft；11- hub splines；12- axle sleeve active push plate；13- axle sleeve from
Dynamic push plate；14- mode conversion device；15- fluid reservoir；16- master cylinder ante-chamber；17- master cylinder first piston；18- braking
The first working chamber of master cylinder；19- master cylinder second piston；The second working chamber of 20- master cylinder；21- master cylinder；22-ABS/
ESP module；The direct push plate of 23- pedal；24- decouples valve；25- make-up valve；26- throttle valve；27- pedal simulator；28- simulation
Device piston；The hydraulic force snesor of 29-；30- pedal displacement sensor；31- grade master cylinder；32- grade master cylinder piston；33- braking
Pedal.
Specific embodiment
The utility model is further described in detail below with reference to figure.
When normal brake application, when driver's brake pedal 33, decoupling valve 24, make-up valve 25 are in working condition,
Decoupling valve 24 is closed at this time, and make-up valve 25 is opened, and pedal displacement sensor 30 obtains displacement information and passes to electronic control unit
ECU1 after electronic control unit ECU1 receives information, calculates required total brake force, then according to the work of power motor 3
Characteristic and the working condition of battery 2 calculate the size of the regenerative braking force of driving power motor 3, are subtracted by total brake force
Regenerative braking force can be obtained the hydraulic braking force size needed for this time braking, and electric signal passed to power motor 3, then
Power motor 3 is pushed away according to the automatically controlled linear moving module of order-driven of electronic control unit ECU1 by rack gear active push plate 8
The driven push plate 9 of carry-over bar then drives hub splines 11 to be axially moved, then is actively pushed away by the axle sleeve of 11 right end of splined shaft axle sleeve
Plate 12 pushes the driven push plate 13 of axle sleeve to move, so that 17 setting in motion of master cylinder first piston, in master cylinder first piston
17 the first working chambers of master cylinder when blocking the first compensation hole 18 start to build pressure, to push master cylinder the by spring spindle
Two pistons 19, when master cylinder second piston 19 blocks the second compensation hole, the second working chamber of master cylinder 20 also starts to build pressure,
Brake fluid flows to ABS/ESP module 22 by fluid pressure line at this time, transmits brake force to each wheel cylinder.
When power motor 3 can not provide braking moment or the damage of automatically controlled linear moving module so that it cannot pass because of failure
When passing brake force, fault diagnosis system is diagnosed to be fault-signal and passes to electronic control unit ECU1, and electronic control unit ECU1 makes at once
Entire braking system is in hydraulic backup mode, decouples valve 24 at this time and opens, make-up valve 25 is closed, when driver continues to step on system
When dynamic pedal 33, brake fluid directly enters master cylinder ante-chamber 16 along decoupling valve 24 and pedal simulator 27, pushes braking master
Cylinder first piston 17 travels forward, and separates the driven push plate 13 of axle sleeve active push plate 12 and axle sleeve being in contact originally, to allow
Brake fluid in master cylinder 21 enters ABS/ESP module 22 and generates brake force, realizes and brakes to vehicle.It is driven after the completion of braking
The person of sailing loosens the brake 33, and master cylinder first piston 17 returns to the driven push plate 13 of axle sleeve due to the effect of reset spring
Originally the state being in contact with axle sleeve active push plate 12.
When normal brake application and hydraulic backup mode all break down, fault diagnosis system is diagnosed to be fault-signal and transmits
Electronic control unit ECU1 is given, electronic control unit ECU1 issues control instruction to rotating electric machine 7 at this time, and rotating electric machine 7 is made to drive splined shaft
10 rotation 180 degrees, while splined shaft 10 drives hub splines 11 also to rotate 180 degree so that the direct push plate 23 of pedal and rack gear from
Dynamic push plate 9 is in contact, at this time brake pedal 33, then the direct push plate 23 of pedal, which pushes directly on the driven push plate 9 of rack gear, makes spline
Axle sleeve 11 is axially moved, and is then pushed master cylinder piston to carry out building pressure, is generated brake force, and brake force source is the pure of driver at this time
Strength of one's legs.
Claims (3)
1. a kind of electronic hydraulic brake system with dual failures protection, including electronic control unit ECU (1), battery (2), power
Motor (3), bevel gear pair (4), gear (5), rack gear (6), rack gear active push plate (8), the driven push plate of axle sleeve (13), mode conversion
Device (14), fluid reservoir (15), master cylinder ante-chamber (16), master cylinder first piston (17), the first working chamber of master cylinder
(18), master cylinder second piston (19), the second working chamber of master cylinder (20), master cylinder (21), ABS/ESP module
(22), the direct push plate of pedal (23), decoupling valve (24) make-up valve (25), throttle valve (26), pedal simulator (27), simulator are living
Fill in (28), hydraulic force snesor (29), pedal displacement sensor (30), secondary master cylinder (31), secondary master cylinder piston (32), braking
Pedal (33), it is characterised in that: the mode conversion device (14) includes rotating electric machine (7), the driven push plate of rack gear (9), flower
Key axis (10), hub splines (11) and axle sleeve active push plate (12)；The rack gear active push plate (8) and the rack gear are driven
Push plate (9) is breakaway-element contact, and the axle sleeve active push plate (12) also contacts with the driven push plate of the axle sleeve (13) for breakaway-element.
2. a kind of electronic hydraulic brake system with dual failures protection according to claim 1, it is characterised in that: institute
The hub splines (11) rotary motion can be driven by stating splined shaft (10), and the hub splines (11) can be along the spline
Axis (10) is axially moved.
3. a kind of electronic hydraulic brake system with dual failures protection according to claim 1, it is characterised in that: institute
The instruction that the electronic control unit ECU (1) is issued can be received by stating rotating electric machine (7), and the splined shaft (10) is driven to revolve
Turnback, after the splined shaft (10) drives hub splines (11) the rotation 180 degree, the direct push plate of pedal (23) with
The driven push plate of rack gear (9) then contacts at breakaway-element, is at this time mechanical backup mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821751632.1U CN209022904U (en) | 2018-10-28 | 2018-10-28 | A kind of electronic hydraulic brake system with dual failures protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821751632.1U CN209022904U (en) | 2018-10-28 | 2018-10-28 | A kind of electronic hydraulic brake system with dual failures protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209022904U true CN209022904U (en) | 2019-06-25 |
Family
ID=66908291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821751632.1U Expired - Fee Related CN209022904U (en) | 2018-10-28 | 2018-10-28 | A kind of electronic hydraulic brake system with dual failures protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209022904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267897A (en) * | 2020-01-02 | 2020-06-12 | 中车株洲电力机车有限公司 | Method and device for judging fault of throttle valve of hydraulic braking system |
-
2018
- 2018-10-28 CN CN201821751632.1U patent/CN209022904U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267897A (en) * | 2020-01-02 | 2020-06-12 | 中车株洲电力机车有限公司 | Method and device for judging fault of throttle valve of hydraulic braking system |
| CN111267897B (en) * | 2020-01-02 | 2021-03-26 | 中车株洲电力机车有限公司 | Method and device for judging fault of throttle valve of hydraulic braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190625 Termination date: 20201028 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |