CN108819931A - A kind of electric vehicle positive-pressure type brake booster - Google Patents
A kind of electric vehicle positive-pressure type brake booster Download PDFInfo
- Publication number
- CN108819931A CN108819931A CN201810414869.9A CN201810414869A CN108819931A CN 108819931 A CN108819931 A CN 108819931A CN 201810414869 A CN201810414869 A CN 201810414869A CN 108819931 A CN108819931 A CN 108819931A
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- Prior art keywords
- pressure
- valve
- positive
- brake
- cylinder
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Classifications
-
- 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
- B60T13/24—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 gaseous
- B60T13/26—Compressed-air systems
- B60T13/268—Compressed-air systems using accumulators or reservoirs
-
- 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
- B60T13/74—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 electrical assistance or drive
- B60T13/745—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 electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The present invention provides a kind of electric vehicle positive-pressure type brake booster, including brake pedal, master cylinder, wheel cylinder, power supply, electrical pressure pump, pressure pan, check valve, positive-pressure type booster；It is connected between brake pedal and master cylinder by positive-pressure type booster, the other end of master cylinder connects wheel cylinder, wheel cylinder is connect with electrical pressure pump, and power supply and pressure pan are connected on electrical pressure pump, and pressure pan is connect by check valve with the high pressure admission mouth of positive-pressure type booster；The present invention realizes brake boost using the high pressure chest of positive-pressure type booster and the pressure difference of atmosphere chamber, and in high altitude localities or in the case where continuous braking, braking boosting effect is stablized；Since the present apparatus is the improvement carried out on the basis of vacuum booster, cost is lower, while not influencing on the general layout of vehicle, has very extensive applicability.
Description
Technical field
The invention belongs to vehicle technology fields, are related to a kind of device of brake boost, specifically a kind of electric vehicle positive pressure
Formula brake booster.
Background technique
Electric parking brake system mainly continues to use conventional gasoline vehicle vacuum boosting braking system at present.But due to electric vehicle
It is using battery as power source, without the negative pressure of vacuum generated in petrol engine breathing process, therefore in traditional vacuum servo
In system, need to increase by 1 motor-driven vacuum pump to substitute engine as vacuum source, other structures and orthodox car
Vacuum boosting braking system is identical.
Since vacuum servo is realized using vacuum source on vehicle and the barometric pressure difference of territory of use, therefore the pressure
Power difference will be influenced by territory of use's height above sea level (i.e. atmospheric pressure), i.e., it is just smaller to get over high pressure differential for height above sea level, braking
Effect is also poorer.
When lower long slope is continuously braked, due to continuously stepping on brake pedal, when the speed of vacuum pump supplement vacuum is lower than electricity
The brake boost of motor-car vacuum booster can weaken.
Method of the electrocar under highlands and continuous brake condition the case where brake boost decrease is solved at present
Substantially have following several：（1）Use high performance vacuum pump；（2）Use the vacuum booster of big specification, i.e. increase vacuum servo
The effective area of device diaphragm, it is done so that production cost is undoubtedly improved, and arrangement space is limited, increases vacuum servo
Device size can have an impact arrangement（3）Using novel electromechanical servo servomechanism, but the cost of this mechanism is very high,
The scope of application is small.
Summary of the invention
The purpose of the present invention is to propose to a kind of electric vehicle positive-pressure type brake boosters, can effectively solve electric vehicle on plateau
The problem of brake boost weakens under area and continuous brake condition, and structure is simpler, and cost is less expensive, and the scope of application is more
Extensively.
Used technical solution is the present invention to achieve the goals above：
A kind of electric vehicle positive-pressure type brake booster, including brake pedal, master cylinder, wheel cylinder, power supply, electrical pressure pump,
Pressure pan, check valve, positive-pressure type booster；It is connected between brake pedal and master cylinder by positive-pressure type booster, braking master
The other end of cylinder connects wheel cylinder, and wheel cylinder is connect with electrical pressure pump, and power supply and high pressure are connected on electrical pressure pump
Tank, pressure pan are connect by check valve with the high pressure admission mouth of positive-pressure type booster；
The positive-pressure type booster is made of control valve system and servo gas chamber, and servo gas chamber is made of front and rear housings, gas chamber diaphragm
It is mounted on servo cameral mantle bar, servo gas chamber is divided into atmosphere chamber and high pressure chest, the atmosphere chamber is by procapsid, gas chamber
The cavity that membrane barrier, gas chamber membrane barrier lengthened plate, gas chamber diaphragm, boosting piston surround, gas chamber diaphragm outside and shell riveting
It connects, inside and boosting piston are interference fitted, and the atmosphere chamber is communicated with the atmosphere by installing the atmospheric air port of air filter screen additional, atmosphere chamber
Interior that the master cylinder push rod for being cased with diaphragm return spring is arranged, master cylinder push rod one end is for connecting master cylinder, the other end
It is connect with rubber reaction plate；The high pressure chest is the cavity surrounded by back casing and gas chamber diaphragm, and high pressure chest side is equipped with hub
Cylinder, hub cylinder are sealed using sealing ring, are provided with control for brake valve follower, push rod return spring and valve spring in hub cylinder, are made
It is socketed push rod return spring on dynamic control valve follower, the high pressure admission mouth for connecting pressure pan, high pressure chest are provided on hub cylinder
It is connected between hub cylinder by a gas passage being set on servo cameral mantle bar；The control valve system includes atmos-valve
And pressure valve, atmos-valve and pressure valve are set to that control valve system is intracavitary, and control valve system chamber is similarly disposed in hub cylinder, control valve system
It is connected between chamber and atmosphere chamber by being set to another gas passage of servo cameral mantle on piece；Pressure valve and brake control valve
Push rod by bulb hinged, pitch for connecting the adjustment of brake pedal by the connection of the control for brake valve follower other end, fills on atmos-valve
There is valve spring, valve spring covers on control for brake valve follower.
Apparatus of the present invention realize brake boost using the high pressure chest of positive-pressure type booster and the pressure difference of atmosphere chamber, in height
Altitude Regions or in the case where continuous braking, braking boosting effect is stablized；And the present apparatus is the base in vacuum booster
The Curve guide impeller carried out on plinth, cost is lower, while not influencing on the general arrangement of vehicle, has very extensive applicability.
Apparatus of the present invention are suitable for the vehicle emulation experiment rack or braking system simulation test stand of pure electric vehicle and electric vehicle
Frame.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the structural schematic diagram of positive-pressure type brake booster in apparatus of the present invention.
1, brake pedal in figure；2, master cylinder；3, wheel cylinder；4, power supply, 5, electrical pressure pump；6, pressure pan；7,
Check valve；8, positive-pressure type booster；9, motor；10, pressure pump；11, adjustment fork；12, sealing ring；13, push rod return spring；
14, valve spring；15, atmos-valve；16, pressure valve；17, gas chamber diaphragm；18, high pressure chest；19, gas chamber membrane barrier；20, gas chamber
Membrane barrier lengthened plate；21, air filter screen；22, atmospheric air port；23, diaphragm return spring；24, atmosphere chamber；25, rubber reaction
Disk；26, gas passage A；27, high pressure gas air inlet；28, control for brake valve follower；29, master cylinder push rod；30, power-assisted is living
Plug；31, gas passage B；32, servo cameral mantle bar；33, hub cylinder；34, control valve system chamber.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing：
A kind of electric vehicle positive-pressure type brake booster, as shown in Figure 1, include brake pedal 1, master cylinder 2, wheel cylinder 3,
Power supply 4, electrical pressure pump 5, pressure pan 6, check valve 7, positive-pressure type booster 8；Pass through between brake pedal 1 and master cylinder 2
Positive-pressure type booster 8 connects, and the other end of master cylinder 2 connects wheel cylinder 3, and wheel cylinder 3 is connect with electrical pressure pump 5,
Power supply 4 and pressure pan 6 are connected on electrical pressure pump 5, pressure pan 6 passes through the high pressure admission of check valve 7 and positive-pressure type booster 8
Mouth connection.
Positive-pressure type booster is made of servo gas chamber and control valve system, and servo gas chamber is made of front and rear housings, gas chamber diaphragm
17 are mounted on servo cameral mantle bar 32, and servo gas chamber is divided into atmosphere chamber 24 and high pressure chest 18, the atmosphere chamber 24 be by
The cavity that procapsid, gas chamber membrane barrier 19, gas chamber membrane barrier lengthened plate 20, gas chamber diaphragm 17, boosting piston 30 surround, gas
Diaphragm 17 outside in room is riveted with shell, and inside and boosting piston 30 are interference fitted, and the atmosphere chamber is by installing air filter screen 21 additional
Atmospheric air port 22 be communicated with the atmosphere, setting is cased with the master cylinder push rod 29 of diaphragm return spring 23, braking master in atmosphere chamber 24
For connecting master cylinder 2, the other end is connect 29 one end of cylinder push rod with rubber reaction plate 25；The high pressure chest 18 is by rear shell
The cavity that body and gas chamber diaphragm 17 surround, 18 side of high pressure chest are equipped with hub cylinder 33, and hub cylinder 33 is sealed using sealing ring 12, hub cylinder 33
It is inside provided with control for brake valve follower 28, push rod return spring 13 and valve spring 14, is socketed on control for brake valve follower 28
Push rod return spring 13 is additionally provided with the high pressure admission mouth 27 for connecting pressure pan 6, high pressure chest 18 and hub cylinder 33 on hub cylinder 33
Between pass through a gas passage A26 connection being set on servo cameral mantle bar 32；Control valve system includes 15 He of atmos-valve
Pressure valve 16, atmos-valve 15 and pressure valve 16 are set in control valve system chamber 34, and control valve system chamber 34 is similarly disposed at hub cylinder 33
Interior, between control valve system chamber 34 and atmosphere chamber 24 by being set on servo cameral mantle bar 32 another gas passage B31
Connection；By bulb hinged, 28 other end of control for brake valve follower is connected for connecting for pressure valve 16 and control for brake valve follower 28
The adjustment fork 11 of brake pedal 1 is connect, valve spring 14 is housed on atmos-valve 15,14 sets of valve spring in control for brake valve follower 28
On.
Brake pedal 1 generates brake force in the case where driver acts on；Positive-pressure type booster 8 utilizes atmosphere chamber 24 and high pressure chest 18
Pressure difference will act on master cylinder after the amplification of power output that brake pedal 1 generates；Electrical pressure pump 5 is used for compressed air,
Obtain the pressure-air of driving positive-pressure type booster；Pressure pan 6 stores pressure-air, is brake boost process energy reserve；System
Dynamic master cylinder 2, converts hydraulic coupling for brake force and passes to wheel cylinder, wheel cylinder 3, and the hydraulic energy of master cylinder input is changed
For mechanical energy, braking is realized.
Positive-pressure type booster 8 is improved on the basis of traditional vacuum booster, eliminates air cleaner simultaneously
It is sealed with sealing ring；18 hub cylinder of high pressure chest opens a circular high pressure admission mouth 27, and is connected by check valve 7 and pressure pan 6
Logical, the high pressure gas of pressure pan 6 is supplied by electrical pressure pump 5；The atmospheric air port 22 of atmosphere chamber 24 installs air filter screen 21 additional and leads to atmosphere.By
Larger in the pressure of high pressure chest 18, positive-pressure type booster 8 installs gas chamber membrane barrier lengthened plate 20 additional in gas chamber membrane barrier 19,
Effect is to prevent gas chamber rupture of diaphragm.
The process of present apparatus brake boost is：
When electric vehicle normally travel, under the action of push rod return spring 13 and valve spring 14, atmos-valve 15 is opened, pressure
Power valve 16 is in the closed position, completely cuts off high pressure chest 18 and high pressure gas, and atmosphere chamber 24 is connected with high pressure chest 18 simultaneously；When driving
When the person's of sailing brake pedal 1, brake pushrod 28 overcomes the active force of push rod return spring 13 and valve spring 14, movement one
Determine stroke, atmos-valve 15 is closed, at this point, atmosphere chamber 24 and high pressure chest 18 completely cut off, continues brake pedal 1, pressure valve 16 is beaten
It opens high pressure gas and high pressure chest 18 is entered by high pressure gas air inlet 27, gas passage A26, high pressure gas pushes boosting piston 30 and leads to
Crossing master cylinder push rod 29 pushes the piston of master cylinder 2 to realize brake boost, passes through rubber reaction plate 25 in pressure valve 16
While forcing in master cylinder push rod 29, continue to step on brake pedal, boosting piston 30 moves forward, and passes through rubber reaction plate 25
Periphery pushes master cylinder push rod 29, increases to the thrust of master cylinder 2, when rubber reaction plate 25 periphery deflection with
Pressure valve 16 act on rubber reaction plate 25 deflection it is identical when, pressure valve 16 close, make high pressure chest 18 and high pressure gas every
Absolutely, positive-pressure type booster 8 reaches new equilbrium position.By 25 transmitting thrust of rubber reaction plate, it ensure that and helped by positive-pressure type
The thrust that power device 8 increases is directly proportional to 1 active force of brake pedal, i.e., when different power acts on rubber reaction plate 25, reaches
Deformation quantity when balance is different, i.e., reaches flat with hydraulic coupling when atmospheric pressure when control for brake valve follower 28 stops at an arbitrary position
When weighing apparatus, pressure valve 16 is closed, to realize the follow-up action of positive-pressure type booster 8.
When air pressure assisted failure, control for brake valve follower 28 can directly be withstood on rubber reaction plate 25, push braking
Master cylinder push rod 29, master cylinder 2 piston, acting on wheel cylinder 3, braked by the manpower of driver.
When releasing braking, pedal is unclamped, under the action of push rod return spring 13, control for brake valve follower 28 is with dynamic pressure
Valve 16 moves right, and is first shut off pressure valve 16, and the movement of continuation will open atmos-valve 15, and two cavity gas chamber of booster is connected to, greatly
Air pressure re-establishes.At the same time, under the action of diaphragm return spring 23, gas chamber diaphragm 17, gas chamber membrane barrier 19, power-assisted
Piston 30 returns to initial position, makes positive-pressure type booster in the raw.
The high pressure gas that electrical pressure pump 5 generates is stored in pressure pan 6 by the present apparatus, when needing to brake, in atmos-valve
15, under the collective effect of pressure valve 16, open high pressure gas circuit, high pressure gas enters the high pressure chest of positive-pressure type booster 8
18, the opening size of valve steps on the size change of the power of brake pedal 1 with the moving distance of control for brake valve follower 28 when braking
Change.
For positive-pressure type booster 8, the effect of gas chamber membrane barrier lengthened plate 20 is gas chamber diaphragm when preventing braking
17 rupture in the case where two chamber High Pressure Differences；Atmospheric air port 22 installs air filter screen 21 additional, prevents extraneous dust and other dirty
Object enters the atmosphere chamber of positive-pressure type booster, causes the blocking of atmospheric air port.
Claims (2)
1. a kind of electric vehicle positive-pressure type brake booster, it is characterised in that：Including brake pedal, master cylinder, wheel cylinder, electricity
Source, electrical pressure pump, pressure pan, check valve, positive-pressure type booster；Pass through positive-pressure type between the brake pedal and master cylinder
The other end of booster connection, the master cylinder connects wheel cylinder, and the wheel cylinder is connect with electrical pressure pump, described
Power supply and pressure pan are connected on electrical pressure pump, the pressure pan is connect by check valve with positive-pressure type booster.
2. a kind of electric vehicle positive-pressure type brake booster according to claim 1, it is characterised in that：The positive-pressure type helps
Power device is made of control valve system and servo gas chamber, and servo gas chamber is made of front and rear housings, and gas chamber diaphragm is mounted on servo cameral mantle
On bar, servo gas chamber is divided into atmosphere chamber and high pressure chest, the atmosphere chamber is by procapsid, gas chamber membrane barrier, cameral mantle
The cavity that piece partition lengthened plate, gas chamber diaphragm, boosting piston surround, gas chamber diaphragm outside are riveted with shell, and inside and power-assisted are living
Plug interference fit, the atmosphere chamber are communicated with the atmosphere by installing the atmospheric air port of air filter screen additional, and setting is cased with diaphragm in atmosphere chamber
The master cylinder push rod of return spring, master cylinder push rod one end is for connecting master cylinder, the other end and rubber reaction plate
Connection；The high pressure chest is the cavity surrounded by back casing and gas chamber diaphragm, and high pressure chest side is equipped with hub cylinder, and hub cylinder is using sealing
Circle seals, and is provided with control for brake valve follower, push rod return spring and valve spring in hub cylinder, covers on control for brake valve follower
Push rod return spring is connect, the high pressure admission mouth for connecting pressure pan is provided on hub cylinder, by setting between high pressure chest and hub cylinder
It is placed in the connection of a gas passage on servo cameral mantle bar；The control valve system includes atmos-valve and pressure valve, atmos-valve
It is set to that control valve system is intracavitary, and control valve system chamber is similarly disposed in hub cylinder, between control valve system chamber and atmosphere chamber with pressure valve
Another gas passage by being set to servo cameral mantle on piece connects；Pressure valve and control for brake valve follower are cut with scissors by bulb
It connects, the connection of the control for brake valve follower other end is pitched for connecting the adjustment of brake pedal, and valve spring, valve are housed on atmos-valve
Spring pocket is on control for brake valve follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414869.9A CN108819931A (en) | 2018-05-03 | 2018-05-03 | A kind of electric vehicle positive-pressure type brake booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414869.9A CN108819931A (en) | 2018-05-03 | 2018-05-03 | A kind of electric vehicle positive-pressure type brake booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108819931A true CN108819931A (en) | 2018-11-16 |
Family
ID=64148053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810414869.9A Pending CN108819931A (en) | 2018-05-03 | 2018-05-03 | A kind of electric vehicle positive-pressure type brake booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108819931A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111256903A (en) * | 2019-12-20 | 2020-06-09 | 浙江零跑科技有限公司 | Plateau vacuum degree sensor for new energy vehicle and testing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593079A (en) * | 1976-12-29 | 1981-07-15 | Tokico Ltd | Booster for vehicle braking system |
| CN1092031A (en) * | 1992-12-11 | 1994-09-14 | 东机工株式会社 | Booster of gaseous pressure type |
| CN105752064A (en) * | 2016-02-29 | 2016-07-13 | 北京长城华冠汽车科技股份有限公司 | Automobile hydraulic braking system |
| CN107901898A (en) * | 2017-11-07 | 2018-04-13 | 中国第汽车股份有限公司 | Air booster assembly based on feedback dish structure |
| CN207257653U (en) * | 2017-10-20 | 2018-04-20 | 山西聚星辰制动科技有限公司 | Automobile brake positive pressure booster |
-
2018
- 2018-05-03 CN CN201810414869.9A patent/CN108819931A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593079A (en) * | 1976-12-29 | 1981-07-15 | Tokico Ltd | Booster for vehicle braking system |
| CN1092031A (en) * | 1992-12-11 | 1994-09-14 | 东机工株式会社 | Booster of gaseous pressure type |
| CN105752064A (en) * | 2016-02-29 | 2016-07-13 | 北京长城华冠汽车科技股份有限公司 | Automobile hydraulic braking system |
| CN207257653U (en) * | 2017-10-20 | 2018-04-20 | 山西聚星辰制动科技有限公司 | Automobile brake positive pressure booster |
| CN107901898A (en) * | 2017-11-07 | 2018-04-13 | 中国第汽车股份有限公司 | Air booster assembly based on feedback dish structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111256903A (en) * | 2019-12-20 | 2020-06-09 | 浙江零跑科技有限公司 | Plateau vacuum degree sensor for new energy vehicle and testing method |
| CN111256903B (en) * | 2019-12-20 | 2021-05-11 | 浙江零跑科技有限公司 | Plateau vacuum degree sensor for new energy vehicle and testing method |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181116 |