CN101508286A - Brake booster for electric motor - Google Patents
Brake booster for electric motor Download PDFInfo
- Publication number
- CN101508286A CN101508286A CNA2009100812516A CN200910081251A CN101508286A CN 101508286 A CN101508286 A CN 101508286A CN A2009100812516 A CNA2009100812516 A CN A2009100812516A CN 200910081251 A CN200910081251 A CN 200910081251A CN 101508286 A CN101508286 A CN 101508286A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- brake
- motor
- energy storage
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Braking Systems And Boosters (AREA)
Abstract
The invention relates to a brake booster for electric vehicles and belongs to the technical field of electric vehicles. The device mainly comprises four parts: a motor-driven reciprocal circulation pressurization cylinder supercharging device, a high voltage energy storage device, an assistant force drive device and a controller. The controller is connected with the motor-driven reciprocal circulation pressurization cylinder supercharging device, the high voltage energy storage device, the assistant force drive device and a brake signal senor of an automotive brake respectively; the motor-driven reciprocal circulation pressurization cylinder supercharging device is connected with the high voltage energy storage device 2, and the high voltage energy storage device is connected with the assistant force drive device; and the assistant force drive device is connected with the car arrester 5. The brake booster for electric vehicles can save a vacuum booster device with the large volume, and facilitate the realization of the braking of assistant force simultaneously.
Description
Technical field
The invention belongs to the vehicle technology field, particularly the design of battery-driven car brake servo unit.
Background technology
Along with the development of ev industry, the actuating device of automobile has become battery from driving engine.Consider that hydraulic braking can realize forcing to move by convenient fast speed, guarantee the braking safety of automobile, still adopt traditional hydraulic brake system on the battery-driven car mostly.Because lost this degree of vacuum source of driving engine, the vacuum booster unit in the brake system can't be realized normal brake boost.
Owing to simple rely on the brake pedal braking force obviously to be difficult to satisfy promptly to force moving needs, and greatly increased the required treadle effort of chaufeur glancing impact, very easily make driver fatigue.The method of dealing with problems on the existing battery-driven car is to adopt the electronic vacuum servo-unit, and promptly at electronic vacuum generating means of orthodox car vacuum booster front end series connection, the mode that adopts the motor-driven piston pump to vacuumize provides degree of vacuum to vacuum booster.Though this method has realized brake boost, because this mode has still kept the vacuum booster of larger volume, occupied a large amount of machinery space spaces, be unfavorable for the space utilization of battery-driven car.
Summary of the invention
The objective of the invention is to propose a kind of electric vehicle brake servo unit, can remove bulky vacuum booster unit, can realize brake boost easily simultaneously for overcoming the weak point of prior art.
A kind of electric vehicle brake servo unit that the present invention proposes is characterized in that this brake servo unit mainly comprises:
Motor-driven reciprocal circulation pressurization cylinder pressurizer is used for pressurized air, obtains driving the high pressure air of brake booster;
The high-voltage energy storage device is used to store high pressure air, is brake boost process energy reserve;
Assistant force drive device is used for braking procedure and follows brake pedal motion and simultaneously braking procedure is carried out power-assisted;
Controller is used to control the pressurization of whole brake servo unit pressurizer, and the break-make in power-assisted loop in the assistant force drive device, realizes brake boost;
The annexation of each several part is: controller links to each other with motor-driven reciprocal circulation pressurization cylinder pressurizer, high-voltage energy storage device, assistant force drive device and the drg speed-slackening signal of automobile sensor own respectively, motor-driven reciprocal circulation pressurization cylinder pressurizer links to each other with the high-voltage energy storage device, the high-voltage energy storage device links to each other with assistant force drive device, and assistant force drive device links to each other with the drg of automobile itself.
Characteristics of the present invention and beneficial effect:
The present invention adopts controller control motor-driven reciprocal circulation pressurization cylinder pressurizer, air compression to high pressure high-voltage energy storage device is stored, when the needs glancing impact, controller opens high pressure gas loop, under the conciliation of wedge shape air inlet valve, high pressure gas are introduced in the piston cylinder of assistant force drive device, by the piston rod of leverage driving master brake cylinder, realize power-assisted.
This device adopts wedge shape air inlet valve control charge flow rate, and brake boost is than increasing and increase along with brake-pedal travel, has changed under the traditional vacuum power-assisted mode power-assisted than invariable power-assisted mode, make force moving more convenient.
Compare with traditional vacuum booster, work-saving device does not need to rely on driving engine degree of vacuum to drive.Therefore the brake boost problem in the time of can solving battery-driven car etc. and lack degree of vacuum.Owing to omitted vacuum booster, saved the space, reduced the realization cost.Pass through to regulate the pressure of high-voltage energy storage device simultaneously, the power-assisted ratio that realization that can be easy is different, and need not change structure, thereby have applicability widely.
This brake servo unit can be used for pure electric vehicle, fuel cell electric vehicle, and needs improve the car chassis electronic simulation T/S of speed-slackening signal etc.
Description of drawings
Fig. 1 is an electric vehicle brake servo unit structural representation of the present invention.
Fig. 2 is wedge shape air inlet valve 32 structural representations of battery-driven car brake servo unit work-saving device of the present invention.
Fig. 3 is controller 3 schematic diagrams of electric vehicle brake servo unit of the present invention.
The specific embodiment
A kind of electric vehicle brake servo unit that the present invention proposes reaches embodiment in conjunction with the accompanying drawings and is described in detail as follows.
Electric vehicle brake servo unit structure of the present invention as shown in Figure 1, this device mainly is made up of four parts: motor-driven reciprocal circulation pressurization cylinder pressurizer 1, be used for pressurized air, obtain driving the high pressure air of brake booster; High-voltage energy storage device 2 is used to store high pressure air, is brake boost process energy reserve; Assistant force drive device 3 is used for braking procedure and follows brake pedal motion and simultaneously braking procedure is carried out power-assisted; Controller 4 is used to control the pressurization of whole brake servo unit pressurizer 1, and the break-make in power-assisted loop 17 in the assistant force drive device 3, realizes brake boost.
The annexation of each several part is: controller 4 is connected with motor-driven reciprocal circulation pressurization cylinder pressurizer 1, high-voltage energy storage device 2, assistant force drive device 3 and the drg speed-slackening signal of automobile sensor circuit own respectively; Motor-driven reciprocal circulation pressurization cylinder pressurizer 1 links to each other by pressure gas pipeline 17 with high-voltage energy storage device 2, and high-voltage energy storage device 2 links to each other by power-assisted loop 23 with assistant force drive device 3.Assistant force drive device 3 links to each other with the drg 5 of automobile itself by power-assisted lever 36.
The specific embodiment structure and the function of each part mentioned above are respectively described below.
Motor-driven reciprocal circulation pressurization cylinder pressurizer 1:
Turbin generator drives reciprocation cycle pressurized cylinder pressurizer 1 keystone configuration and comprises: first, second air inlet valve 161,181 and first, second one-way exhaust valve 162,182 in power supply DC 11, relay 12, DC machine M 13, first, second reciprocation cycle pressurized cylinder 16 and 18, oval cam actuating device 14 and control gaseous loop; The annexation of each several part is: power supply 11 passes through lead directly from the automotive battery power taking, DC machine M 13, relay 12, power supply DC 11 connect and compose motor control loop 19 successively, relay 12 links to each other with controller 4, and controller 4 is by the energising and the outage of relay 12 control motors 13.Output shaft 131 front ends of motor 13 are by oval cam driver train 14 of bolt; Adopt support with reciprocation cycle pressurized cylinder 16,18 and motor output shaft 13 vertical installing and locating; Piston rod 163,183 1 ends in the pressurized cylinder 16 and 18 link to each other with 184 with pressurized cylinder spring 164, and the other end withstands on the cam drive mechanism 14.Breather cheek valve 161,181, one-way exhaust valve 162,182 are separately positioned on reciprocation cycle pressurized cylinder 16,18 both sides, control cut-offfing of reciprocation cycle pressurized cylinder 16,18 air inlets and exhausr port, and one-way exhaust valve 162,182 links to each other and constitutes pressure gas pipelines 17.
The principle of work of motor-driven reciprocal circulation pressurization cylinder pressurizer 1 is: piston rod 163 and 183 crank motion in pressurized cylinder 16,18 when motor 13 rotations.When the piston rod 163 in the pressurized cylinder 16,18 and 183 during to intermediary movements, breather cheek valve 161 and 181 is opened, and one- way exhaust valve 162 and 182 is closed, in air admission piston cylinder 16 and 18 the cavity; When moving, breather cheek valve 161 and 181 is closed to both sides (piston cylinder bottom) when piston rod 163 and 183, and one- way exhaust valve 162 and 182 is opened, and pressurized air enters in the cavity of high-voltage energy storage device 22 through pipeline 17.Check valve 161,181,162 and 182 adopt the mode of pressure limiting spring extruding small ball to realize the sealing in loop.The intensity of pressure limiting spring is adjusted according to Structural Design Requirement.
High-voltage energy storage device 2:
The high-voltage energy storage device mainly is made up of the piston cylinder 22 and the gas pressure sensor that carry out compressed gas storage.In the middle of the piston cylinder be can sway piston, the piston right side is equipped with the compression spring 24 that meets GB HB8292-2002 extra fine grade, gas pressure sensor 21 is installed in bottom piston cylinder 22 high pressure chests, piston cylinder low-pressure cavity (right chamber) and atmosphere are connected.Piston cylinder 22 breaks UNICOM by two branch roads of pipeline 17 and the height of pressurized cylinder 16,18, the left chamber of servo cylinder by high pressure gas loop 23 and brake booster 3 33 UNICOM.
The principle of work of high-voltage energy storage device is: when piston cylinder was not inflated, spring was in free state.When pressure gas entered, the compression energy by spring 24 storage high pressure gas increased the speed that high pressure gas enter the servo cylinder 33 of brake booster 3 at power-assisted process medi-spring 24 rapid release.The pressure that measures when pressure sensor 21 is during less than the pressure set, controller is opened motor-driven reciprocal circulation pressurization cylinder pressurizer 1, pressure gas promptly enters the left chamber of piston cylinder 22 through piping 17, along with gas constantly enters, gaseous tension raises gradually, spring 24 is gradually reduced, till pressure reaches setting pressure.
Assistant force drive device 3:
Brake booster 3 mainly is made up of a servo cylinder 33, two-position three way electromagnetic switch valve 31, power-assisted lever 36 and screw rod 37, and wedge shape air inlet valve 32, pull back spring 34 and piston 35 are installed in the servo cylinder 33; The annexation of each several part is: piston rod 35 right-hand members of servo cylinder 33 connect wedge shape air inlet valve 32, and left end links to each other with power-assisted lever 36 by pull back spring 34; The power-assisted lever is fixed on the vehicle body by the screw rod on the locating support 37, power-assisted lever 36 can rotate around screw rod 37, servo cylinder 33 links to each other with the piston cylinder 22 of high-voltage energy storage device by two-position three way electromagnetic switch valve 31, and (gas return path links to each other with power-assisted in servo cylinder 33 left chambeies, by 31 controls of two-position three way electromagnetic switch valve in formation high pressure gas loop 23.Switch valve 31 lower position are the path in the left chamber of UNICOM high pressure gas loop 23 and servo cylinder 33; Switch valve 31 upper side positions have two passages, and the joint in left side is for being communicated with the seal in high pressure gas loop 23, and the right side is the pressure release exhaust passage of UNICOM's servo cylinder 33 left chambeies and atmosphere).The piston rod 54 of the master brake cylinder of the upper end of power-assisted lever 36 and automobile itself is hinged, with piston rod 54 interlocks.Pull back spring 34 realizes braking the return that unclamps primary piston bar 35 in the servo cylinder.
The principle of work of brake booster is: when stepping on brake pedal and need power-assisted, controller gives switch valve 31 energisings, moves on the switch valve 31, is communicated with the left chamber of high pressure gas loop 23 and servo cylinder 33; During take-off the brake, switch valve 31 moves down, and disconnects high pressure gas loop 23, and the left chamber with servo cylinder 33 is connected with atmosphere simultaneously.
The principle of work of the wedge shape air inlet valve 32 of servo cylinder 33 as shown in Figure 2, when wedge valve 32 moves right when servo cylinder 33 admission ports are sealed, shown in Fig. 2 a, high pressure gas and servo cylinder 33 are isolated; When piston 35 bars of servo cylinder 33 drive the wedge valve motion to the right (among Fig. 2 shown in the double-lined arrow), shown in Fig. 2 b and 2c, the air inlet aperture increases gradually, the flow that high pressure gas (among Fig. 2 shown in the single line arrow) enter servo cylinder 33 right chambeies increases, thereby realize brake boost than increasing and increase along with brake-pedal travel, changed that power-assisted makes that than invariable power-assisted mode high strength or emergency braking are more convenient under the traditional vacuum power-assisted mode.
Controller 4:
The working process of electric vehicle brake servo unit of the present invention comprises as shown in Figure 3: gas compression thermal energy storage process, brake boost process, 4 mode of operations such as compensation of brake boost pressure process and pressure leak process.Concrete flow process is respectively described below.
The gas compression thermal energy storage process:
Set the upper pressure limit of closed-center system 2 by controller 4.Give relay 12 energisings, UNICOM's motor-drive circuit; When not having speed-slackening signal (the speed-slackening signal sensor 52 output speed-slackening signals in brake pedal all have this sensor in the car brake), the air electromagnetic switch valve 31 of two-position three way disconnects.Along with pressurized air constantly increases from pipeline 17, high-voltage energy storage device pressure raises gradually.High pressure gas can be advanced to rapidly in the servo cylinder 33 when making power-assisted.When the pressure sensor gaging pressure reached setting value, controller 4 disconnected the relay 14 of motor 13 driving circuits, and motor is shut down.
The brake boost process:
When chaufeur was stepped on brake pedal, signal took place to controller braking in braking sensor 52, and electromagnetic switch valve 31 is connected compressed air lines 23 are done the servo cylinder 33 of device 3 to brake boost the pipeline in left chamber.Along with brake pedal 53 is operated, the piston rod 54 in the master brake cylinder 55 moves right, and braking liquid is squeezed into wheel cylinder realizes braking.At this moment, because piston cylinder 54 moves right, under the effect of lever 36, the piston rod 35 in the brake booster 3 moves right, thereby the wedge shape air inlet valve 32 in the traction piston cylinder 33 moves right, and opens the admission port that pressurized air enters servo cylinder 33 left chambeies gradually.Because the left chamber of piston cylinder 33 links to each other with atmosphere, under the pressure differential effect of chamber, the left and right sides, overcomes aftertaste spring 34 to left movement, further promote the lower end of lever 36, thereby power-assisted is delivered on the piston rod 54 of master brake cylinder 55, realize brake boost.Increase along with the piston rod 54 of master brake cylinder 55 moves right displacement, the aperture of wedge shape air inlet valve 31 increases, and the high pressure gas flow increases, and makes servo cylinder 33 left and right sides pressure reduction increase sharply, and realizes power-assisted faster.By the gaseous tension of setting high-voltage energy storage device 2 and the opening degree of dip of wedge shape air inlet valve 31, can design the brake boost curve that needs.
The compensation of power-assisted pressure process:
High-voltage energy storage device 2 inner high voltage gases enter into brake boost by power-assisted pipeline 23 and do device 3, the pressure decay in the high-voltage energy storage device 2 when power-assisted.When the pressure of measuring by sensor 21 was lower than the pressure of setting, controller 4 was opened relay 12, starter motor 13 supplementary pressures.Thereby guarantee the power-assisted effect in whole braking procedure.
Pressure leak process:
When the chaufeur loosen the brake, controller 5 drives electromagnetic switch valve 31, pressurized air loop 23 is blocked, the right chamber of piston cylinder 33 is linked to each other with atmosphere, high pressure gas in the work-saving device are drained in the atmosphere, under the effect of pull back spring 34, piston rod 35 moves to right, and wedge valve 32 is closed admission port.
Claims (5)
1, a kind of electric vehicle brake servo unit is characterized in that, this brake servo unit mainly comprises:
Motor-driven reciprocal circulation pressurization cylinder pressurizer is used for pressurized air, obtains driving the high pressure air of brake booster;
The high-voltage energy storage device is used to store high pressure air, is brake boost process energy reserve;
Assistant force drive device is used for braking procedure and follows brake pedal motion and simultaneously braking procedure is carried out power-assisted;
Controller is used to control the pressurization of whole brake servo unit pressurizer, and the break-make in power-assisted loop in the assistant force drive device, realizes brake boost;
The annexation of each several part is: controller links to each other with motor-driven reciprocal circulation pressurization cylinder pressurizer, high-voltage energy storage device, assistant force drive device and the drg speed-slackening signal of automobile sensor own respectively, motor-driven reciprocal circulation pressurization cylinder pressurizer links to each other with the high-voltage energy storage device, the high-voltage energy storage device links to each other with assistant force drive device, and assistant force drive device links to each other with the drg of automobile itself.
2, brake servo unit according to claim 1, it is characterized in that, described motor-driven reciprocal circulation pressurization cylinder pressurizer mainly comprises: first, second breather cheek valve and first, second one-way exhaust valve in power supply, relay, DC machine, first, second reciprocation cycle pressurized cylinder, oval cam actuating device and control gaseous loop; The annexation of each several part is: directly from the automotive battery power taking, DC machine, relay, power supply connect and compose motor control loop to described power supply successively by lead; The output shaft front end of motor is installed with the oval cam driver train; It is described that multiple circularly-supercharged cylinder is vertical with motor output shaft installs toward first, second; Piston rod one end in first, second pressurized cylinder links to each other with cylinder inner spring separately, and the other end of the piston rod in first, second pressurized cylinder withstands on the cam drive mechanism respectively; First, second breather cheek valve, first, second one-way exhaust valve are separately positioned on first, second reciprocation cycle pressurized cylinder both sides, and first, second one-way exhaust valve links to each other and constitutes the pressure gas pipeline.
3, a kind of brake servo unit according to claim 1 is characterized in that, described high-voltage energy storage device mainly is made up of piston cylinder that carries out compressed gas storage and gas pressure sensor; Be provided with the piston of sway in the middle of the piston cylinder, the piston right side is equipped with compression spring, and described gas pressure sensor is installed in piston cylinder 22 high pressure chests bottom, and low right chamber of piston cylinder and atmosphere are connected.
4, a kind of brake servo unit according to claim 1, it is characterized in that, described brake booster mainly is made up of a servo cylinder, two-position three way electromagnetic switch valve, power-assisted lever and screw rod, and wedge shape air inlet valve, pull back spring and piston are installed in the servo cylinder; The annexation of each several part is: the piston rod right-hand member of servo cylinder connects the wedge shape air inlet valve, and left end links to each other with the power-assisted lever by pull back spring; The power-assisted lever is fixed on the vehicle body by the screw rod on the locating support.
5, a kind of brake servo unit according to claim 1 is characterized in that, described controller adopts 8-bit microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100812516A CN101508286B (en) | 2009-03-31 | 2009-03-31 | Brake booster for electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100812516A CN101508286B (en) | 2009-03-31 | 2009-03-31 | Brake booster for electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101508286A true CN101508286A (en) | 2009-08-19 |
| CN101508286B CN101508286B (en) | 2012-06-20 |
Family
ID=41000870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100812516A Active CN101508286B (en) | 2009-03-31 | 2009-03-31 | Brake booster for electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101508286B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818369A (en) * | 2014-02-27 | 2014-05-28 | 南京舜唐科技有限公司 | High-pressure brake assisting control system of electric motor coach |
| CN104015623A (en) * | 2014-06-11 | 2014-09-03 | 苏州市京达环卫设备有限公司 | Vehicle control system of blade electric vehicle and blade electric vehicle structure |
| CN108146415A (en) * | 2018-01-05 | 2018-06-12 | 瑞立集团瑞安汽车零部件有限公司 | A kind of electronic parking pile-up valve and its control method |
| CN110422154A (en) * | 2019-09-03 | 2019-11-08 | 佛山市清极能源科技有限公司 | A kind of fuel cell automobile hydrogen servobrake system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW271424B (en) * | 1992-12-11 | 1996-03-01 | Tokico Ltd | |
| JPH0769207A (en) * | 1993-06-17 | 1995-03-14 | Tokico Ltd | Air pressure type boosting device |
| US5476029A (en) * | 1993-09-20 | 1995-12-19 | Tokico Ltd. | Pneumatic booster having vacuum and pressurized air sources |
| ES2190697B1 (en) * | 2000-06-02 | 2004-11-01 | Analisis Y Simulacion, S.L. | PERFECTION IN A SERVOFRENE SYSTEM. |
-
2009
- 2009-03-31 CN CN2009100812516A patent/CN101508286B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103818369A (en) * | 2014-02-27 | 2014-05-28 | 南京舜唐科技有限公司 | High-pressure brake assisting control system of electric motor coach |
| CN104015623A (en) * | 2014-06-11 | 2014-09-03 | 苏州市京达环卫设备有限公司 | Vehicle control system of blade electric vehicle and blade electric vehicle structure |
| CN104015623B (en) * | 2014-06-11 | 2017-01-25 | 苏州市京达环卫设备有限公司 | Vehicle control system of blade electric vehicle and blade electric vehicle structure |
| CN108146415A (en) * | 2018-01-05 | 2018-06-12 | 瑞立集团瑞安汽车零部件有限公司 | A kind of electronic parking pile-up valve and its control method |
| CN108146415B (en) * | 2018-01-05 | 2023-03-31 | 瑞立集团瑞安汽车零部件有限公司 | Electronic parking integrated valve and control method thereof |
| CN110422154A (en) * | 2019-09-03 | 2019-11-08 | 佛山市清极能源科技有限公司 | A kind of fuel cell automobile hydrogen servobrake system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101508286B (en) | 2012-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108501921B (en) | A kind of hydraulic line control brake system and its brake control method with double pressure sources | |
| CN206406908U (en) | A kind of motor driving EHB for improving master cylinder | |
| CN105584471B (en) | A kind of electronic automobile-used brake operating mechanism of integrated assist function | |
| CN108216174B (en) | Redundant dual active supercharging braking system | |
| CN104943672A (en) | Hydraulic brake system and method with double hydraulic cylinder four-wheel failure backup | |
| CN103318162A (en) | Pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement | |
| CN107891850A (en) | A kind of integrated electric hydraulic brake system with decoupling function | |
| CN110774900B (en) | Full-decoupling regenerative braking device for hub motor driven automobile and control method | |
| CN101508286B (en) | Brake booster for electric motor | |
| CN106740778B (en) | Integrated brake master cylinder | |
| CN106274851A (en) | A kind of hydraulic means of full decoupling formula Recovering Waste Energy of Braking in Automobiles | |
| CN104859625A (en) | Vehicle integrated electro-hydraulic brake (EHB) system | |
| CN102050098B (en) | Hydraulic dynamic brake operating system for tractor | |
| CN104169143A (en) | Vehicle brake device | |
| CN202728214U (en) | Motor-assistant integrated automobile brake system | |
| CN201296241Y (en) | Hydraulic energy braking and energy regeneration device for battery electric vehicle | |
| CN202827109U (en) | Performing mechanism for hybrid electric vehicle clutch with limp function | |
| CN205417597U (en) | Integrated automatically controlled hydraulic braking system of vehicle | |
| CN201777235U (en) | Electric vacuum brake assisting system | |
| CN207631211U (en) | A kind of integrated electric hydraulic brake system with decoupling function | |
| CN202716864U (en) | Integrated hydraulic unit of automobile braking system | |
| CN102795216A (en) | Hydraulic unit for integrated automobile brake system | |
| CN206358136U (en) | A kind of integrated form master cylinder | |
| CN201325446Y (en) | Composite braking mechanism of motor vehicle | |
| CN207902418U (en) | A kind of dual active boost braking system of redundance type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |