CN110194136A - A kind of hydraulic booster assembly apparatus with braking backup functionality - Google Patents
A kind of hydraulic booster assembly apparatus with braking backup functionality Download PDFInfo
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- CN110194136A CN110194136A CN201910593721.0A CN201910593721A CN110194136A CN 110194136 A CN110194136 A CN 110194136A CN 201910593721 A CN201910593721 A CN 201910593721A CN 110194136 A CN110194136 A CN 110194136A
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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
- B60T13/16—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 pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/161—Systems with master cylinder
Abstract
The present invention relates to the power-assisted assembly apparatus for being applied to brake system of car, more particularly to a kind of hydraulic booster assembly apparatus with braking backup functionality, its slide valve sealing structure for having two groups of arranged in series and main accumulation of energy pipeline engaged therewith and secondary accumulation of energy pipeline, it can be by the way that sequentially successively release is high hydraulic as power-assisted, generate the output pressure with the braking input linear corresponding relationship of operating quantity, it is supplied to liquid braking device use, it has braking backup functionality, power brake effect is good, the safety is improved, braking response speed is fast, braking distance is short, use can be extended in fully loaded gross mass on 10000kg vehicle below, expand equipment vehicle range, hydraulic booster assembly apparatus of the invention is the design of single output piston structure, axial dimension is compact, structure is simple, convenient for assembly arrangement；Braking characteristic is consistent with traditional vacuum booster performance, and braking feel is more preferable, it can be achieved that substitution completely, also alternative part gas braking.
Description
Technical field
The present invention relates to the power-assisted assembly apparatus for being applied to brake system of car, and in particular to one kind has braking backup function
The hydraulic booster assembly apparatus of energy.
Background technique
Nearly two during the last ten years, and Chinese Automobile Industry ' obtains continuing rapid development, until automobile production and marketing in 2018 is just born
Increase, but car ownership still sustainable growth, early in 2017 more than 200,000,000.Automobile be the bigger industry of carbon emission amount it
One, no matter there is carbon emission in production process or use process, wherein exhaust emissions is even more that domestic big and medium-sized cities air is dirty
The main source of dye, country are also increasingly tighter to Exhaust emission limit value required standard.
Chinese Government exempts new-energy automobile vehicle-purchase tax policy bulletin in publication on August 7th, 2014, and puts into effect purchase vehicle
Subsidy policy, place register the license the forms such as policy favour to push being constantly progressive for new-energy automobile technology, accelerate new-energy automobile
It promotes and applies.Formally " passenger car enterprise average fuel consumption and new-energy automobile integrate concurrent management to September 27 in 2017 for publication
Method ", further new-energy automobile industry is promoted to flourish.Shown according to China Association for Automobile Manufacturers's data, 2018 I
State's new-energy automobile production and marketing continues to increase rapidly, and production and marketing is respectively completed 127.05 ten thousand and 125.62 ten thousand, increases by a year-on-year basis
59.92% and 61.74%.No matter passenger car or commercial vehicle have all developed to motorized, electric car is with fastest developing speed new
One of energy automobile becomes and gradually replaces a kind of traditional energy automobile inevitably motor trend at this stage.
Traditional energy automobile starts function to generate vacuum, vacuum booster can be given to provide vacuum source, therefore vacuum servo
Brake booster of the device as passenger car first choice；But new-energy automobile is not equipped with engine, that is equivalent to vacuum booster
Without vacuum source, there is limitation to the use of vacuum booster.
In the prior art, passenger car and some lesser commercial vehicles of fully loaded gross mass (micro- visitor/microcaloire) have by increasing electricity
Dynamic vacuum pump is come vacuum needed for obtaining vacuum booster, but noise is bigger than normal at work for electric vacuum pump, to the noise of vehicle
Control brings difficulty；The volume of the supporting parts such as electric vacuum pump and vacuum tank is also bigger, to compact machine cavity arrangement also band
Come difficult；Electric vacuum pump cost is not also low, also brings challenges to integral vehicle cost control.Meanwhile the quick sound of vacuum booster
Answer speed bad；Maximum power-assisted output pressure be limited to the vacuum degree of vacuum source, vacuum booster size specification and it is relatively small,
It is limited to be applicable in vehicle, may not apply to the relatively large vehicle (such as commercial vehicle) of some fully loaded gross masses.Currently, these vehicles use
Gas braking system price it is more expensive.
Summary of the invention
The present invention provides a kind of hydraulic booster assembly dress with braking backup functionality aiming at the shortcomings in the prior art
It sets, the hydraulic conduct of height of the auxiliary hydraulic pressure source supply of two groups of high hydraulic energy-accumulating pipelines of independence in parallel can be opened by sequential system
Power-assisted generates output pressure corresponding with braking input operating quantity linear relationship, for the liquid braking device in braking system；It should
The hydraulic range of height of hydraulic booster assembly apparatus application can be adjusted according to practical application, be applicable to different fully loaded gross masses
Vehicle.
The purpose that the invention is realized by the following technical scheme:
A kind of hydraulic booster assembly apparatus with braking backup functionality, comprising:
Master cylinder shell, the front end closing of the master cylinder shell, rear end offers the opening being connected to its inner cavity, the master cylinder
Shell successively offers the hydraulic output channel of rear height, normal pressure channel C 0, the normal pressure channel C 1, preceding height being connected to inner cavity from front to back
Hydraulic output channel, the hydraulic input channel of main height and secondary high hydraulic input channel；
Brake piston component, the brake piston component slippage are set to the front of master cylinder housing cavity, with master cylinder shell
Precision-fit is enclosed set composition one after brake chamber, it is described after brake chamber with it is described after high hydraulic output channel be connected to；
Boosting piston component, the boosting piston component slippage are set to the rear portion of master cylinder housing cavity, including main piston,
Auxiliary piston and the input lever being slideably positioned in main piston, the front end of the main piston are abutted with brake piston, the auxiliary piston
Sliding sleeve is set to the rear portion of main piston, and the input rod rear end is stretched out from master cylinder enclosure interior, the main piston and input lever essence
Close fit forms main slide valve sealing mechanism and secondary slide valve sealing mechanism, and the main piston, auxiliary piston and master cylinder shell are respectively in pair
Forward and backward enclose of piston sets the main power-assisted chamber of composition and secondary power-assisted chamber, and the main piston and input lever, which are enclosed, sets composition pair feedback cavity, described
Secondary feedback cavity is connected to the secondary power-assisted chamber, and main slide valve sealing mechanism side is connected to main power-assisted chamber, the other side and main height
Hydraulic input channel connection, the pair slide valve sealing mechanism side are connected to secondary power-assisted chamber, and the other side and secondary high hydraulic input are logical
Road connection；
The main piston and master cylinder shell, which enclose, sets the preceding brake chamber of composition, and the preceding brake chamber is connected to main power-assisted chamber, described
Preceding brake chamber is connected to the preceding hydraulic output channel of height；
Front sliding inside the main piston is provided with feedback piston, and the main piston and feedback piston, which enclose, sets composition master
Feedback cavity, the primary feedback chamber are connected to main power-assisted chamber, and the first return spring is provided between the feedback piston and input lever；
High hydraulic accumulator power-assisted component, including mutually independent main accumulation of energy pipeline and secondary accumulation of energy pipeline, the main accumulation of energy
Pipeline and secondary accumulation of energy pipeline are respectively connected to the main hydraulic input channel of height and secondary high hydraulic input channel；
Liquid storage canister assembly, including three points of chambers and connector, respectively with high hydraulic accumulator power-assisted component, boosting piston group
Part is connected to brake piston component；
The internal run-through of the input lever is provided with the brake fluid return flow line being connected to normal pressure channel.
Further, the main slide valve sealing mechanism actuating length is less than secondary slide valve sealing mechanism actuating length.
Further, the main slide valve sealing mechanism includes main pressure relief valve port, main high pressure valve port and main valve-closed port, in master
It is main high-pressure channel that input lever between high pressure valve port and main valve-closed port, which is equipped with an annular groove, the pair slide valve sealing mechanism packet
Secondary pressure relief valve port, secondary high pressure valve port and secondary valve-closed port are included, the input lever is equipped with an axial shallow slot at secondary high pressure valve port rear
For secondary high-pressure channel, the actuating length of the main pressure relief valve port and secondary pressure relief valve port is respectively smaller than main high pressure valve port and secondary high pressure valve
The actuating length of mouth.
Further, before the opening junction, middle part of the rear portion periphery of the main piston and master cylinder shell and auxiliary piston
Junction, the junction of front end and master cylinder shell and side is respectively arranged with sealing before and after the main hydraulic input channel of height afterwards
The periphery of part, the auxiliary piston is respectively arranged with sealing element, the main piston inner cavity in side before and after secondary high hydraulic input channel
The rear end junction and feedback piston of wall and input lever are provided with sealing element in the junction of primary feedback chamber front and rear sides.
Further, the outer circle of the main piston and auxiliary piston has two sections of diameters, and it is straight that rear end diameter is respectively greater than front end
Diameter can realize hydraulic returning place force backward using high hydraulic hydraulic action difference, release main piston and auxiliary piston
Initial position is rapidly returned back to when braking.
Further, after the brake piston component includes output piston and is used to help brake piston when releasing braking
The second return spring of position is retracted, one end of the output piston is abutted with main piston, and the other end passes through the second return bullet
Spring is abutted with the front end of master cylinder shell, its described second return spring is set in rear brake chamber.
Further, the side before and after normal pressure channel C 0 connect punishment with master cylinder inner walls for the periphery of the output piston
Sealing element is not provided with it.
Further, the main accumulation of energy pipeline and secondary accumulation of energy pipeline share a set of Hydraulic Conirol Unit, or individually match
Standby a set of Hydraulic Conirol Unit.
Preferably, the Hydraulic Conirol Unit includes motor, the hydraulic pump and controller being connected to motor respectively, also
Including respectively with the main hydrostatic sensor of main accumulation of energy pipeline and secondary accumulation of energy piping connection, secondary hydrostatic sensor, the main accumulation of energy pipe
Road is connect with main accumulator A, main hydrostatic sensor and hydraulic pump respectively, the pair accumulation of energy pipeline respectively with secondary accumulator B, secondary liquid
Pressure sensor and hydraulic pump connection, the controller are connect with motor, main hydrostatic sensor and secondary hydrostatic sensor respectively.
Further, the end of the input lever is connected with the U-shaped plug for connecting brake pedal.
Compared with the existing technology, the invention has the benefit that
Two groups of main accumulation of energy pipelines in parallel are arranged in the hydraulic booster assembly apparatus with braking backup functionality of the invention
With secondary accumulation of energy pipeline and the main slide valve sealing mechanism matched with them and secondary slide valve sealing mechanism, make hydraulic booster assembly
Device has braking backup functionality, has a better brake pedal feel than existing vacuum booster, higher output pressure, faster
Braking response speed, shorter braking distance；There is a higher output pressure than Electric booster, better power-assisted effect, more
Safety；It is safer after a spare high hydraulic energy-accumulating auxiliary more than single high hydraulic energy-accumulating hydraulic pressure of pipe line booster, it is especially full
Carry the relatively large vehicle of gross mass；Mating more small in size than the braking system that gas is stopped, assembly arrangement is convenient, brakes relatively soft, system
Dynamic pedal sense is good, and advantageous in terms of cost price；Hydraulic booster assembly apparatus of the invention is able to achieve vacuum booster one
The braking effect of sample and more preferable, brake parameters are also easy Matching and modification；It meanwhile being single-chamber output piston structure, axial space
Size is small, compact-sized, small in size, highly beneficial to machine cavity components arrangement, in addition, hydraulic booster assembly of the invention fills
The hydraulic range of height for setting application can be adjusted according to practical application, be applied to fully loaded gross mass in 10000kg passenger car below
And commercial vehicle.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the invention.
Fig. 2 is that main accumulation of energy pipeline of the invention works-discharge the schematic diagram of the section structure under high hydraulic state.
Fig. 3 is the schematic diagram of the section structure under main accumulation of energy pipeline work-brake compensation state of the invention.
Fig. 4 is the schematic diagram of the section structure under major-minor accumulation of energy pipeline work-brake compensation shape of the invention.
Fig. 5 is the present invention main accumulation of energy pipeline work-brake compensation state the schematic diagram of the section structure under brake chamber failure.
Fig. 6 is the present invention secondary accumulation of energy pipeline work-brake compensation state cross-section structure signal under the failure of main accumulation of energy pipeline
Figure.
Appended drawing reference: 1-U shape plug, 2- input lever, 3- main piston, 4,5- sealing element, 6- master cylinder shell, 7- auxiliary piston,
8,9- sealing element, the first return spring of 10-, 11- sealing element, 12- feedback piston, 13- sealing element, 14- output piston, 15-
Two return springs, 16,17- sealing element, 18- fluid reservoir, 19- hydraulic pump, 20- motor, 21- controller, 22- check valve, 23- master
Accumulator A, 24a- main hydrostatic sensor, 24b- pair hydrostatic sensor, 25- pair accumulator B, BB- pair power-assisted chamber, the main power-assisted of AA-
Chamber, brake chamber before QQ-, brake chamber after RR-, high hydraulic output channel before Q-, high hydraulic output channel after R-；A1, A2, A3- master
High hydraulic input channel, A4-A6 are the channel for inputting main power-assisted chamber, and A7-A8 is the channel for inputting primary feedback chamber, and B1-B5 is pair
High hydraulic input channel, B6-B8 be the channel of input pair power-assisted chamber, C0- normal pressure channel C 0, C1- normal pressure channel C 1, and C2-C8 is
Normal pressure channel；XK- output piston idle stroke, FA- primary feedback chamber, FB- pair feedback cavity, the main pressure relief valve port of F1-, the main high pressure valve of F2-
Mouthful, the main valve-closed port of F3-, F4- pair valve-closed port, F5- pair high pressure valve port, F6- pair pressure relief valve port.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention will be described in detail.
Embodiment 1.
As shown in Figure 1, the present embodiment provides a kind of hydraulic booster assembly apparatus with braking backup functionality, comprising:
Master cylinder shell 6, brake piston component, boosting piston component, liquid storage canister assembly 18 and high hydraulic accumulator power-assisted component, the master
Cylinder housing 6 offer respectively from front to back the hydraulic output channel R of rear height being connected to inner cavity, normal pressure channel C 0, normal pressure channel C 1,
The hydraulic output channel Q of preceding height, the hydraulic input channel A1 of main height, secondary high hydraulic input channel B1；
The brake piston component slippage is set to the front of 6 inner cavity of master cylinder shell, encloses and sets with 6 precision-fit of master cylinder shell
Brake chamber RR after constituting one, the rear brake chamber RR are connected to rear high hydraulic output channel R；
The boosting piston component slippage is set to the rear portion of 6 inner cavity of master cylinder shell, including main piston 3, auxiliary piston 7 and cunning
The dynamic input lever 2 being set in main piston 3, the end of the input lever 2 is connected with U-shaped plug 1, the front end of the main piston 3
It is abutted with brake piston component, 7 sliding sleeve of auxiliary piston is set to the rear portion of main piston 3, and 2 rear end of input lever is from master cylinder shell
It is stretched out inside body 6, the main piston 3 forms main slide valve sealing mechanism and secondary slide valve sealing mechanism, institute with 2 precision-fit of input lever
It states main piston 3, auxiliary piston 7 and master cylinder shell 6 and sets the main power-assisted chamber AA of composition and secondary power-assisted chamber in forward and backward enclose of auxiliary piston 7 respectively
BB, the main piston 3, which encloses to set with input lever 2, to be constituted pair feedback cavity FB, the pair feedback cavity FB and is connected to the pair power-assisted chamber BB,
Main slide valve sealing mechanism side is connected to main power-assisted chamber AA, and the other side is connected to the hydraulic input channel A1 of main height, the pair
Slide valve sealing mechanism side is connected to pair power-assisted chamber BB, and the other side is connected to secondary high hydraulic input channel B1；
Above-mentioned main piston 3 and master cylinder shell 6, which encloses, sets the preceding brake chamber QQ, the preceding brake chamber QQ and main power-assisted chamber AA of composition
Connection, the preceding brake chamber QQ are connected to the hydraulic output channel Q of preceding height；
Front sliding inside above-mentioned main piston 3 is provided with feedback piston 12, and the main piston 3 is enclosed with feedback piston 12
If constituting primary feedback chamber FA, the primary feedback chamber FA is connected to main power-assisted chamber AA, sets between the feedback piston 12 and input lever 2
It is equipped with the first return spring 10；
Above-mentioned high hydraulic accumulator power-assisted component, including mutually independent main accumulation of energy pipeline and secondary accumulation of energy pipeline, it is described
Main accumulation of energy pipeline and secondary accumulation of energy pipeline are respectively connected to the hydraulic input channel A1 of main height and secondary high hydraulic input channel B1；
It is above-mentioned for storing the liquid storage canister assembly 18 of brake fluid, including three points of chambers and connector, respectively with high hydraulic storage
It can device power-assisted component, boosting piston component, the connection of brake piston component；
The internal run-through of the input lever 2 is provided with the brake fluid return flow line being connected to normal pressure channel C 1.
Hydraulic booster assembly apparatus of the invention be arranged two groups of main accumulation of energy pipelines in parallel and pair accumulation of energy pipeline and with
The main slide valve sealing mechanism and secondary slide valve sealing mechanism that they are matched, make hydraulic booster assembly apparatus have braking backup function
Can, there is a better brake pedal feel than existing vacuum booster, higher output pressure, faster braking response speed, more
Short braking distance；There is higher output pressure than Electric booster, better power-assisted effect is safer；It is high more hydraulic than single
It is safer after the more a spare high hydraulic energy-accumulating auxiliary of accumulation of energy hydraulic pressure of pipe line booster, it is relatively large especially for fully loaded gross mass
Vehicle；Mating more small in size than the braking system that gas is stopped, assembly arrangement is convenient, and braking is relatively soft, and brake pedal sense is good, and at
This is advantageous in price；Hydraulic booster assembly apparatus of the invention is able to achieve the same braking effect of vacuum booster and more
Good, brake parameters are also easy Matching and modification；Meanwhile being single-chamber output piston structure, axial space size is small, and it is compact-sized,
It is small in size, it is highly beneficial to machine cavity components arrangement, in addition, the hydraulic model of height that hydraulic booster assembly apparatus of the invention is applied
Enclosing can adjust according to practical application, be applied to fully loaded gross mass in 10000kg passenger car below and commercial vehicle.
Wherein, the main slide valve sealing mechanism actuating length is less than secondary slide valve sealing mechanism actuating length, is able to achieve main storage
Energy pipeline and secondary accumulation of energy pipeline are successively opened in order.
Wherein, the main slide valve sealing mechanism includes main pressure relief valve port F1, main high pressure valve port F2 and main valve-closed port F3,
It is main high-pressure channel that input lever 2 between main high pressure valve port F2 and main valve-closed port F3, which is equipped with an annular groove, and the pair slide valve is close
Sealing mechanism includes that secondary pressure relief valve port F6, pair high pressure valve port F5 and secondary valve-closed port F4, main valve-closed port F3, pair valve-closed port F4 are born
Duty isolation atmospheric area, main pressure relief valve port F1, pair pressure relief valve port F6 are each responsible for main power-assisted chamber AA, pair power-assisted chamber BB and atmospheric area
On-off, main high pressure valve port F2, pair pressure relief valve port F5 are each responsible for main accumulation of energy pipeline and help with main power-assisted chamber AA, secondary accumulation of energy pipeline and pair
The actuating length of the on-off of power chamber BB, the main pressure relief valve port F1 and secondary pressure relief valve port F6 are respectively smaller than main high pressure valve port F2 and pair
The actuating length of high pressure valve port F5, can reach first close main pressure relief valve port F1, pair pressure relief valve port F6 opens main high pressure valve port F2 again,
Secondary high pressure valve port F5, and then realize the connection for first disconnecting atmospheric area and main power-assisted chamber AA, secondary power-assisted chamber BB, then open high hydraulic storage
The connection of energy device power-assisted component and main power-assisted chamber AA, secondary power-assisted chamber BB, the input lever 2 are equipped with one at the secondary rear high pressure valve port F5
Axial shallow slot is secondary high-pressure channel B6.
Wherein, in order to guarantee the leakproofness between each connector, the rear portion periphery of the main piston 3 and master cylinder shell 6
The junction that opening junction is provided with sealing element 5, middle part periphery and auxiliary piston 7 is provided with sealing element 9, front end and master cylinder shell
6 junction is provided with sealing element 8 and side is respectively arranged with sealing element 8 before and after the hydraulic input channel A1 of main height, described
The periphery of auxiliary piston 7 is respectively arranged with sealing element 8, the rear end of input lever 2 and master in side before and after secondary high hydraulic input channel B1
The junction of 3 internal chamber wall of piston is provided with sealing element 4, and feedback piston 12 and the junction of 3 inner wall of main piston are provided with sealing element
11、13。
Wherein, the outer circle of the main piston 3 and auxiliary piston 7 has two sections of diameters, and rear end diameter is respectively greater than point diameter,
Hydraulic returning place force backward can be realized using high hydraulic hydraulic action difference, and main piston 3 and auxiliary piston 7 is made to release system
Initial position is rapidly returned back to when dynamic.
Wherein, after the brake piston component includes output piston 14 and is used to help brake piston 14 when releasing braking
The second return spring 15 of position is retracted, one end of the output piston 14 is abutted with main piston 3, and the other end passes through described second time
Position spring 15 is abutted with the front end of master cylinder shell 6, its described second return spring 15 is set in rear brake chamber RR, in order to guarantee
Leakproofness, the side junction before and after normal pressure channel C 0 is respectively set with 6 inner cavity of master cylinder shell for the periphery of the output piston 14
There is sealing element 17,16, this hydraulic booster assembly apparatus is single brake piston modular construction, and the output of another brake chamber is direct
It is discharged by one of them above-mentioned high hydraulic accumulator pipeline by slide valve sealing mechanism controllable hydraulic to provide, saves one
Output piston and stroke, axial space size greatly reduce, more compact structure, assembly arrangement of being more convenient for.
Wherein, the main accumulation of energy pipeline and secondary accumulation of energy pipeline can share a set of Hydraulic Conirol Unit, can also be single respectively
It is solely equipped with a set of Hydraulic Conirol Unit, further increases safety.
Wherein, the Hydraulic Conirol Unit includes motor 20, the hydraulic pump 19 and controller 21 connecting respectively with motor 20,
Further include respectively with main accumulation of energy pipeline and the main hydrostatic sensor 24a of secondary accumulation of energy piping connection, secondary hydrostatic sensor 24b, it is described
Main accumulation of energy pipeline is connect with main accumulator A23, main hydrostatic sensor 24a and hydraulic pump 19 respectively, the pair accumulation of energy pipeline difference
It is connect with secondary accumulator B25, pair hydrostatic sensor 24b and hydraulic pump 19 (or another hydraulic pump), the controller 21 is distinguished
It is connect with motor 20, main hydrostatic sensor 23 and secondary hydrostatic sensor 25.
The working principle of the hydraulic booster assembly apparatus for having braking function of the invention:
As shown in Figure 1, driver does not have brake pedal when inoperative, without input power F and displacement, at first time
Position spring 10 assembles under drag, and U-shaped plug 1 and input lever 2 abut 3 rear end step of main piston and be in home position, main accumulation of energy pipe
Road and main power-assisted chamber AA, secondary accumulation of energy pipeline and pair power-assisted chamber BB are respectively by main high pressure valve port F2, pair high pressure valve port F5 and sealing element
8, it 9 blocks, main accumulation of energy pipeline is with atmospheric area (being connected to liquid storage canister assembly 18, channel C 1-C4) by main high pressure valve port F2, main normally close valve
Mouth F3 and sealing element 8 block, and secondary accumulation of energy pipeline and atmospheric area are hindered by secondary high pressure valve port F5, pair valve-closed port F4 and sealing element 8,9
It is disconnected, and main pressure relief valve port F1, pair pressure relief valve port F6 are opening state, make main power-assisted chamber AA, preceding brake chamber QQ, pair power-assisted chamber BB and
Atmospheric area communicates, and feedback piston 12 abuts 3 front end step of main piston under 10 drag of the first return spring, is in home position；
Main power-assisted chamber AA and pair power-assisted chamber BB is not in the case where building pressure power-assisted effect, and boosting piston component (containing main piston 3 and auxiliary piston 7) is no
It can be moved along, be pressed against shrink back by output piston 14 under 15 drag of the second return spring instead, abut against master cylinder shell 6
On rank.
As shown in Fig. 2, at work, when driver's brake pedal, pedal force F and displacement can be transmitted to U-shaped plug
1, input lever 2 is pushed, when input power F is greater than the drag f of the first return spring 10, input lever 2 is moved forward, pressure relief valve port F1
First close, then open high pressure valve port F2, main accumulation of energy pipeline it is hydraulic by the hydraulic input channel A1-A3 of main height enter input master help
The channel A4-A6 of power chamber, it can smoothly enter into preceding brake chamber QQ and main power-assisted chamber AA, because main piston 3 need to overcome 14 front end of output piston
The second return spring 15 drag could forward impelling, it is high it is hydraulic can first pass through before high hydraulic output channel Q enter preceding braking
The brake in circuit eliminates brake clearance and just starts to build pressure Forward.
As shown in figure 3, the hydraulic action forward after main power-assisted chamber AA builds pressure is greater than the drag of the second return spring 15
When, main piston 3 will push output piston 14 and eliminate idle stroke XK forward, and rear brake chamber RR is hydraulic to pass through the rear hydraulic output channel of height
The brake that R enters rear brake circuit eliminates brake clearance and starts to build pressure, and building output piston 14 after pressing has hydraulic feedback backward
Power mutually resists with above-mentioned boosting piston assembly, and at this moment the hydraulic feedback power fa of feedback piston 12 backward will overcome the first return bullet
The drag f of spring 10 moves the Forward of limitation input lever 2 backward；It is no longer reinforced when driver stablizes brake pedal, main piston 3 is in liquid
It presses the lower opposite Forward of input lever 2 of power-assisted effect to close main high pressure valve port F2, is in brake compensation state.
When driver reinforces brake pedal again, input lever 2 moves forward again opens main high pressure valve port F2, and release height is hydraulic to be helped
Power builds higher hydraulic rebalancing.
It brakes, loosens the brake, input lever 2 will no longer be retreated by pedal thrust F, first close main height when driver releases
Pressure valve mouth F2 (or being turned off in balance) opens main pressure relief valve port F1 again, and main power-assisted chamber AA and preceding the hydraulic of brake chamber QQ pass through
Channel A6, A5 of input power-assisted chamber flow into normal pressure channel C 6-C1 and return to liquid storage canister assembly 18, and power-assisted releases；Meanwhile primary feedback chamber
The hydraulic channel A6-A4 also by input primary feedback chamber channel A8-A7, the main power-assisted chamber of input of FA is vented, and in the first return
Home position is returned under the drag of spring 10.After main power-assisted chamber AA pressure release, hydraulic pressure reverse of the output piston 14 in rear brake chamber RR
Rapid backward under power and the drag of the second return spring 15 is presented, rear brake chamber RR and brake hydraulic decline, after output piston 14
It moving back and opens idle stroke XK, the brake fluid of rear brake chamber RR and brake flows back into liquid storage canister assembly 18, and it releases braking process and completes,
Return to initial off-position.
As shown in figure 4, continuing to input pedal force F greater than master when driver needs more high output pressure in braking process
The Max point of booster force input power of accumulator A23, i.e. input lever 2 continue to move forward, and secondary pressure relief valve port F6 can be closed first, then the secondary height that moves forward
Pressure valve mouth F5 can be opened, and the hydraulic of secondary accumulation of energy pipeline enters the logical of the secondary power-assisted chamber of input by secondary high hydraulic input channel B1-B5
Road B6-B8, can smoothly enter into secondary power-assisted chamber BB, and auxiliary piston 7 and sealing element 8,9 participate in power-assisted Forward, compression master under by hydraulic action
Power-assisted chamber AA push main piston 3 and output piston 14 continue Forward build it is higher hydraulic.Meanwhile it is high hydraulic into the secondary power-assisted chamber of input
When the B7 of channel, the sealed diameter of the sealing element 4 in input lever 2 is bigger than the sealed diameter of secondary valve-closed port F4, and input lever 2 will be more
Hydraulic feedback power fb backward, limitation pair high pressure valve port F5 are opened.It is no longer reinforced when driver stablizes brake pedal, input lever 2
It no longer moves forward under hydraulic feedback power fa, fb effect backward, secondary high pressure valve port F5 is closed in the Forward of 3 power-assisted of main piston, in flat
Weighing apparatus state.
When driver reinforces brake pedal again, input lever 2 will move forward again opens secondary high pressure valve port F5, and release is high hydraulic
Power-assisted builds higher hydraulic rebalancing；Until being more than the hydraulic maximum power-assisted of height of secondary accumulation of energy pipeline, input power F is greater than above-mentioned two
The resultant force of the maximum value of hydraulic feedback and the first return spring 10, input lever 2 will continue to move forward, and are pressing against feedback piston 12 and pushing master
Piston 3 moves forward, and pushes the Forward of output piston 14 to build higher hydraulic.
At this moment, it brakes, loosens the brake when driver releases, input lever 2 will no longer be retreated by pedal thrust F, secondary high
Pressure valve mouth F5 first closes (or closing in balance), and secondary pressure relief valve port F6 is opened again, and secondary power-assisted chamber BB's is hydraulic in advance by normal
Pressure passageway C8 is released back into fluid reservoir 18；After secondary power-assisted chamber BB starts pressure release, make in hydraulic action and the second return spring power 15
Secondary power-assisted chamber BB stroke can be compressed with output piston 14 with lower main piston 3 to retreat against auxiliary piston 7, preceding brake chamber QQ and rear braking
The hydraulic of chamber RR will decline；Meanwhile input lever 2 continues to retreat, main high pressure valve port F2 is first closed, and main pressure relief valve port F1 is opened again,
With aforementioned releasing braking, main power-assisted chamber AA and the hydraulic of preceding brake chamber QQ are flowed by input main power-assisted chamber channel A6, A5
Normal pressure channel C 6-C1 returns to fluid reservoir 18, and power-assisted releases；Meanwhile primary feedback chamber FA's is hydraulic logical also by input primary feedback chamber
Road A8-A7, input main power-assisted chamber channel A6-A4 are vented, and are returned to home position under the drag of the first return spring 10.In master
After power-assisted chamber AA pressure release, after output piston 14 is quick under rear brake chamber RR hydraulic feedback power and the drag of the second return spring 15
It moves back, rear brake chamber RR and brake hydraulic decline, output piston 14, which retreats, opens idle stroke XK, rear brake chamber RR and brake
Brake fluid flows back into liquid storage canister assembly 18, releases braking process and completes, returns to initial off-position.
Brake backup functionality explanation:
(1) when rear brake chamber RR fails
As shown in figure 5, driver's brake pedal, defeated when pedal input power F is greater than 10 drag f of the first return spring
Enter the forward movement of bar 2, main pressure relief valve port F1 is first closed, then opens main high pressure valve port F2, and the hydraulic of main accumulation of energy pipeline passes through main height
Hydraulic input channel A1-A3 enters input main power-assisted chamber channel A4-A6, can smoothly enter into preceding brake chamber QQ and main power-assisted chamber AA, because
Main power-assisted main piston component (containing main piston 3 etc.) need to overcome 15 drag of the second return spring of 14 front end of output piston could forward
Promote, it is high it is hydraulic can first pass through before high hydraulic output channel Q enter the brake of front brake circuit and eliminate brake clearance and start to build
Pressure, when the hydraulic action forward of main power-assisted chamber AA is greater than 15 drag of the second return spring, promotion output piston 14 is directly forward
It kills after 6 bottom rigid stress of master cylinder shell, preceding brake chamber QQ and main power-assisted chamber AA rapid pressure, feedback piston 12 is as usual anti-
Feedback limits main high pressure valve port F2 and opens, and equally can reach balance.
Compared with normal kilter, braking process is equivalent to brake chamber RR stroke after main piston more than 3 has walked one, does not have
There is rear brake chamber RR output hydraulic pressure, preceding brake chamber QQ output is no different with normal condition output, is similar to traditional braking master cylinder single-chamber
Failure.
(2) when current brake chamber QQ, main power-assisted chamber AA or main accumulation of energy pipeline fail
As shown in fig. 6, driver's brake pedal, defeated when pedal input power F is greater than 10 drag f of the first return spring
Enter the forward movement of bar 2, main pressure relief valve port F1 is first closed, then opens main high pressure valve port F2, high hydraulic into preceding output cavity QQ and master
It fails and vents after power-assisted chamber AA, or be as a result all that front brake cannot build pressure, feedback piston 12 does not have without high hydraulic release
Feedback force fa backward；Input lever 2 continues to move forward, and as above-mentioned secondary accumulation of energy pipeline participates in power-assisted, secondary pressure relief valve port F6 can be first
Close, then the secondary high pressure valve port F5 that moves forward can open, secondary accumulation of energy pipeline it is hydraulic entered by secondary high hydraulic input channel B1-B5 it is defeated
Enter secondary power-assisted chamber channel B6-B8, can smoothly enter into secondary power-assisted chamber BB, power-assisted auxiliary piston component (including auxiliary piston 7 and sealing element 8,9)
Power-assisted Forward is participated under by hydraulic action, is directly being pressed against power-assisted main piston component (including main piston 3 and sealing element) and is being pushed output
Piston 14 overcomes 15 drag of the second return spring closing idle stroke XK to start to build pressure, backward brake chamber QQ brake output hydraulic pressure.
Meanwhile it is high hydraulic when entering input pair power-assisted chamber channel B7, input lever 2 by backward hydraulic feedback power fb and input power F phase
Anti-, limitation pair high pressure valve port F5 is opened.It is no longer reinforced when driver stablizes brake pedal, main piston 3 is with respect to before 2 power-assisted of input lever
It moves and closes pair high pressure valve port F5, input power F and above-mentioned hydraulic feedback power fb backward, 10 drag f of the first return spring in flat
Weighing apparatus state.
Compared with normal kilter, the stroke that the power-assisted that braking process is equivalent to works has grown a bit, without preceding system
Dynamic chamber QQ output hydraulic pressure, rear brake chamber RR output are no different with normal output, are similar to traditional braking master cylinder single-chamber and fail.
(3) as secondary power-assisted chamber BB or secondary accumulation of energy pipeline failure
Driver's brake pedal, as above-mentioned course of normal operation, only main accumulation of energy pipeline participates in power-assisted work,
When being more than the maximum power-assisted output pressure of main accumulation of energy pipeline, input lever 2 moves forward under pedal force F effect, first closes secondary
Pressure relief valve port F6, then open secondary high pressure valve port F5, it is high it is hydraulic be discharged into secondary power-assisted chamber BB after vent, or released that accumulator is not hydraulic
It puts, power-assisted auxiliary piston component (including auxiliary piston 7 and sealing element 8,9) is simultaneously failure to actuate；Input lever 2 continues to move forward, and is pressing against feedback and is living
12 promotion main piston 3 of plug and output piston 14 further build pressure, are equivalent to input power F and directly participate in building pressure, are similar to single accumulation of energy
Device hydraulic booster.Compared with normal kilter, lacked a power-assisted, maximum power-assisted inflection point relatively it is low little by little.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or it can also be combined between the technical characteristic in different embodiments, and there are different aspects present invention as described above
Many other variations, in order to it is concise they do not provided in details.Therefore, all within the spirits and principles of the present invention,
Any omission, modification, equivalent replacement, improvement for being made etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of hydraulic booster assembly apparatus with braking backup functionality characterized by comprising
Master cylinder shell, the front end closing of the master cylinder shell, rear end offers the opening being connected to its inner cavity, the master cylinder shell
It is hydraulic that the hydraulic output channel of rear height being connected to inner cavity, normal pressure channel C 0, normal pressure channel C 1, preceding height are successively offered from front to back
Output channel, the hydraulic input channel of main height and secondary high hydraulic input channel；
Brake piston component, the brake piston component slippage are set to the front of master cylinder housing cavity, accurate with master cylinder shell
With surround set composition one after brake chamber, it is described after brake chamber with it is described after high hydraulic output channel be connected to；
Boosting piston component, the boosting piston component slippage are set to the rear portion of master cylinder housing cavity, including main piston, pair are lived
The front end of the input lever filled in and be slideably positioned in main piston, the main piston is abutted with brake piston, the auxiliary piston sliding
It is sheathed on the rear portion of main piston, the input rod rear end is stretched out from master cylinder enclosure interior, and the main piston is matched with input lever precision
Conjunction forms main slide valve sealing mechanism and secondary slide valve sealing mechanism, and the main piston, auxiliary piston and master cylinder shell are respectively in auxiliary piston
It is forward and backward enclose to set constitute main power-assisted chamber and secondary power-assisted chamber, the main piston and input lever, which are enclosed, sets the secondary feedback cavity of composition, described secondary anti-
Feedback chamber is connected to the secondary power-assisted chamber, and main slide valve sealing mechanism side is connected to main power-assisted chamber, and the other side and main height are hydraulic
Input channel connection, the pair slide valve sealing mechanism side are connected to secondary power-assisted chamber, and the other side and secondary high hydraulic input channel connect
It is logical；
The main piston and master cylinder shell, which enclose, sets the preceding brake chamber of composition, and the preceding brake chamber is connected to main power-assisted chamber, is made before described
Dynamic chamber is connected to the preceding hydraulic output channel of height；
Front sliding inside the main piston is provided with feedback piston, and the main piston and feedback piston, which enclose, sets composition primary feedback
Chamber, the primary feedback chamber are connected to main power-assisted chamber, and the first return spring is provided between the feedback piston and input lever；
High hydraulic accumulator power-assisted component, including mutually independent main accumulation of energy pipeline and secondary accumulation of energy pipeline, the main accumulation of energy pipeline
The main hydraulic input channel of height and secondary high hydraulic input channel are respectively connected to secondary accumulation of energy pipeline；
Liquid storage canister assembly, including three points of chambers and connector, respectively with high hydraulic accumulator power-assisted component, boosting piston component and
The connection of brake piston component；
The internal run-through of the input lever is provided with the brake fluid return flow line being connected to normal pressure channel.
2. the hydraulic booster assembly apparatus with braking backup functionality stated such as claim 1, which is characterized in that the main cunning
Valve seal mechanism actuating length is less than secondary slide valve sealing mechanism actuating length.
3. the hydraulic booster assembly apparatus with braking backup functionality as claimed in claim 1 or 2, which is characterized in that institute
Stating main slide valve sealing mechanism includes main pressure relief valve port, main high pressure valve port and main valve-closed port, in main high pressure valve port and main normally close valve
Input lever between mouthful is equipped with an annular groove as main high-pressure channel, and the pair slide valve sealing mechanism includes secondary pressure relief valve port, secondary height
Pressure valve mouth and secondary valve-closed port, it is secondary high-pressure channel that the input lever, which is equipped with an axial shallow slot at secondary high pressure valve port rear, described
The actuating length of main pressure relief valve port and secondary pressure relief valve port is respectively smaller than the actuating length of main high pressure valve port and secondary high pressure valve port.
4. the hydraulic booster assembly apparatus with braking backup functionality as described in claim 1, which is characterized in that the master
Front and back junction, front end and the master cylinder shell at be open junction, the middle part and auxiliary piston of the rear portion periphery and master cylinder shell of piston
Junction and side is respectively arranged with sealing element before and after the main hydraulic input channel of height, the periphery of the auxiliary piston is secondary high
The front and back side of hydraulic input channel is respectively arranged with sealing element, the rear end junction of the main piston internal chamber wall and input lever, with
Feedback piston is provided with sealing element in the junction of primary feedback chamber front and rear sides.
5. the hydraulic booster assembly apparatus with braking backup functionality as claimed in claim 1 or 2, which is characterized in that institute
The outer circle for stating main piston and auxiliary piston has two sections of diameters, and rear end diameter is respectively greater than point diameter, using high hydraulic hydraulic
Active force difference can realize hydraulic returning place force backward, and main piston and auxiliary piston is made to rapidly return back to initial bit when releasing braking
It sets.
6. the hydraulic booster assembly apparatus with braking backup functionality as described in claim 1, which is characterized in that the system
Piston component includes output piston and the second return spring for being used to help brake piston retrogressing return when releasing braking, institute
The one end for stating output piston is abutted with main piston, and the other end is abutted by second return spring with the front end of master cylinder shell,
Its described second return spring is set in rear brake chamber.
7. the hydraulic booster assembly apparatus with braking backup functionality as claimed in claim 6, which is characterized in that described defeated
The periphery of piston and master cylinder inner walls side junction before and after normal pressure channel C 0 are respectively arranged with sealing element out.
8. the hydraulic booster assembly apparatus with braking backup functionality as described in claim 1, which is characterized in that the master
Accumulation of energy pipeline and secondary accumulation of energy pipeline share a set of Hydraulic Conirol Unit, or are individually equipped with a set of Hydraulic Conirol Unit.
9. the hydraulic booster assembly apparatus with braking backup functionality as claimed in claim 8, which is characterized in that the liquid
Press control assembly include motor, the hydraulic pump and controller being connected to motor respectively, further include respectively with main accumulation of energy pipeline and pair
The main hydrostatic sensor of accumulation of energy piping connection, secondary hydrostatic sensor, the main accumulation of energy pipeline are hydraulic with main accumulator A, master respectively
Sensor and hydraulic pump connection, the pair accumulation of energy pipeline are connect with secondary accumulator B, secondary hydrostatic sensor and hydraulic pump respectively, institute
Controller is stated to connect with motor, main hydrostatic sensor and secondary hydrostatic sensor respectively.
10. the hydraulic booster assembly apparatus with braking backup functionality as described in claim 1, which is characterized in that described
The end of input lever is connected with the U-shaped plug for connecting brake pedal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910593721.0A CN110194136A (en) | 2019-07-03 | 2019-07-03 | A kind of hydraulic booster assembly apparatus with braking backup functionality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910593721.0A CN110194136A (en) | 2019-07-03 | 2019-07-03 | A kind of hydraulic booster assembly apparatus with braking backup functionality |
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| CN110194136A true CN110194136A (en) | 2019-09-03 |
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| CN201910593721.0A Pending CN110194136A (en) | 2019-07-03 | 2019-07-03 | A kind of hydraulic booster assembly apparatus with braking backup functionality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115366857A (en) * | 2022-08-29 | 2022-11-22 | 珠海博众科企业管理合伙企业(有限合伙) | Can increase hydraulic booster assembly device of discharge capacity |
-
2019
- 2019-07-03 CN CN201910593721.0A patent/CN110194136A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115366857A (en) * | 2022-08-29 | 2022-11-22 | 珠海博众科企业管理合伙企业(有限合伙) | Can increase hydraulic booster assembly device of discharge capacity |
| CN115366857B (en) * | 2022-08-29 | 2023-12-01 | 珠海博众科企业管理合伙企业(有限合伙) | Hydraulic booster assembly device capable of increasing displacement |
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Effective date of registration: 20220617 Address after: 510000 Room 201, building 2, No. 10, Hefeng 1st Street, Yonghe Economic Zone, Huangpu District, Guangzhou City, Guangdong Province Applicant after: Guangzhou Diantong Bohua automobile braking system Co.,Ltd. Address before: 510000 No. 10, 108 Hefeng street, Yonghe Economic Zone, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant before: GUANGZHOU ZHONGBO BRAKE SYSTEM Co.,Ltd. |
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