CN109733353A - Electric brake system and braking method - Google Patents
Electric brake system and braking method Download PDFInfo
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- CN109733353A CN109733353A CN201811619140.1A CN201811619140A CN109733353A CN 109733353 A CN109733353 A CN 109733353A CN 201811619140 A CN201811619140 A CN 201811619140A CN 109733353 A CN109733353 A CN 109733353A
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Abstract
The invention discloses a kind of electric brake systems for energy bi-directional vehicle, it include: that six brake calipers are divided into three groups, first group of brake caliper is mounted on automobile front-axle, second group and third group brake caliper are mounted on vehicle rear axle, the motor that electric parking brake control is mounted on rear axle wheel clamps rear axle wheel third group brake caliper, two electric control hydraulic braking systems connect electronic stabilizing control system by fluid pressure line, electronic stabilizing control system is separately connected four wheel wheel cylinders by brake piping, two electric control hydraulic braking systems can export different braking power to the first group of brake caliper and second group of brake caliper for being located at different braking conduit according to vehicle heading.The present invention can satisfy demand of the bi-directional vehicle to braking system, electric control hydraulic braking system can select suitable braking force distribution ratio, so that forward and reverse actual braking force when driving adapts to improve the safety of vehicle due to the variation of driving direction variation bring vehicle weight distribution.
Description
Technical field
The present invention relates to automotive fields, more particularly to a kind of electric brake system for two-way driven automobile.This hair
It is bright to further relate to a kind of braking method for two-way driven automobile.
Background technique
Autonomous driving vehicle Autonomous vehicles；Self-piloting automobile is also known as unmanned
Automobile, computer driving or wheeled mobile robot are that one kind by computer system realizes unpiloted intelligent automobile.
Have the history of many decades in 20th century, the trend close to functionization is showed at the beginning of 21 century.With the hair of autonomous driving vehicle
Exhibition, many new driving theories are suggested, and two way is exactly one of.Will two way vehicle application to driving automatically
It sails in technology, is avoided that many unidirectional drive are applied to the problem to be evaded of automatic Pilot, such as head end operation.In two-way row
It sails in numerous technical problems of vehicle, bi-directional braking is very important a link, is badly in need of solving.
Automobile is also only limitted to merely pursue driving performance many years ago, nowadays but comes into convenient, comfortable and most
The epoch based on simplified drive manner are measured, so that corresponding electronization equipment increases rapidly.As reliability requirement in automobile
Highest braking system is no exception, and electronic travelling crane braking system is shown up prominently in hybrid power or electric automobiles, electronic hand
Brake also extends some functions and facilitates driving.As shown in Figure 1, orthodox car chassis electrical braking system is by front and back clamp, braking
Pipeline, electric control hydraulic braking system eBooster, electronic brake system EPB and electronic stabilizing control system ESC composition,
The preceding clamp piston big using double-piston or cylinder diameter, antero posterior axis actual braking force the needs of distributing when meeting forward travel braking
Distribution curve is shown in Fig. 2.
Bidirectional driving bi-directional braking require the driving of vehicle, braking and steering behaviour not due to steering direction difference not
Together.Shown in Fig. 1, orthodox car chassis electrical braking system is unable to satisfy braking requirement when vehicle backward going, such as Fig. 2 institute
Show, when the braking of vehicle backward going, since antero posterior axis exchanges, but braking force distribution ratio can not be exchanged, actual braking force point
With curve Beta line substantial deviation ideal braking force distribution curve, vehicle easily occurs unstable when braking, it is therefore desirable to
It can be according to the bidirectional electronic braking system of vehicle heading adjust automatically between centers braking force distribution if a kind of.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electric brake systems that can be used for bi-directional vehicle.
The present invention also provides a kind of braking methods that can be used for bi-directional vehicle.
Forward travel, backward going, front axle and rear axle of the present invention are energy for relatively existing conventional truck
The vehicle of two way, which says driver and passenger, can not distinguish positive, reversed, front axle and rear axle.
In order to solve the above technical problems, the present invention is provided to the electric brake systems of energy bi-directional vehicle, comprising: six
A brake caliper, brake piping, electric parking brake EPB, electronic stabilizing control system ESC and two electric control hydraulic braking systems
Unite eBooster；
Electric parking brake EPB: calculating the gradient by the longitudinal acceleration sensor being built in its computer, thus
The sliding force that vehicle is generated due to gravity on the slope can be calculated, computer applies brake force to rear-wheel to balance by motor
Sliding force enables the vehicle to stop on the slope.When vehicle start, computer passes through the displacement sensor and oil on clutch pedal
The size of door is communicated to calculate the brake force for needing to apply by high-speed CAN with engine computer to know that engine is led
The size of gravitation.Computer calculates the increase of engine traction automatically, reduces brake force accordingly.Under tractive force overcomes enough
When sliding power, computer driving motor releases braking, to realize the smooth starting of vehicle.
Electronic stabilizing control system ESC: automobile electron stabilization control system is the novel active safety system of vehicle, is vapour
Vehicle anti-lock braking system ABS and traction control system TCS function further expand, and on this basis, increase vehicle
Yaw rate sensor, lateral acceleration sensor and steering wheel angle sensor when Turning travel, by ECU control front and back,
The driving force and brake force of left and right wheels, it is ensured that the lateral stability of vehicle driving.
Electronic hydraulic brake system eBooster or EHB are developed on the basis of traditional liquid braking device.Behaviour
Vertical mechanism, instead of traditional hydraulic braking pedal, eliminates bulky vacuum servo with an electronic type brake pedal
Device.
Six brake calipers are divided into three groups, and first group of brake caliper is mounted on automobile front-axle, second group and third group
Brake caliper is mounted on vehicle rear axle, after the motor that the electric parking brake EPB control is mounted on rear axle wheel clamps
Axis wheel third group brake caliper, described two electric control hydraulic braking system eBooster connect electronic stability by fluid pressure line
Control system ESC, the electronic stabilizing control system ESC are separately connected four wheel wheel cylinders by brake piping, described two
Electric control hydraulic braking system eBooster can export different braking power according to vehicle heading and return to different braking pipeline is located at
First group of brake caliper and second group of brake caliper on road.
It is further improved the electric brake system, six brake caliper sizes are identical.Conventional vehicles front axle brake
Clamp are bigger (fixed proportion) than rear axle caliper size, and generation braking moment is bigger under identical brake fluid pressure, this is to adapt to
The fact that load transfer causes front axle load bigger when braking.Before and after the solution of the present invention is using double eBooster independent controls
Axis brake pressure can dynamically distribute antero posterior axis brake fluid pressure ratio, can theoretically be adapted to the front and back of any size ratio
Axis clamp can save the type selecting of foundation brake system, design work using the antero posterior axis clamp of identical size, for
For eBooster control, in driving direction switching also without the concern for the difference of front and back caliper size, be conducive to double
The coordinated control of eBooster.
It is further improved the electric brake system, six brake calipers include four double-piston brake calipers and two
A single plug brake caliper.
It is further improved the electric brake system, two double-piston brake calipers are divided into first group of brake caliper, separately
Outer two double-piston brake calipers are divided into second group of brake caliper, and two single plug brake calipers are divided into third group brake caliper.
It is further improved the electric brake system, the electric parking brake EPB is MOC electric parking brake.
It is further improved the electric brake system, the brake piping is H-type brake piping, at two coaxial tires
In same brake circuit.
It is further improved the electric brake system, described two electric control hydraulic braking system eBooster master cylinders only have
One chamber.There are two chambers for traditional braking booster master cylinder, are separately connected two braking hydraulic circuits of vehicle.The present invention is double
EBooster control, one brake circuit of each eBooster independent control, therefore the master cylinder of each eBooster only needs one
A chamber connects a brake circuit.Brake circuit is H-type, i.e., two wheel cylinders of front axle are in the same circuit, two wheel cylinders of rear axle
In the same circuit.
It is further improved the electric brake system, when receiving brake request, described two electric control hydraulic braking systems
EBooster calculates separately respective according to the vehicle heading that brake force request and electronic stabilizing control system ESC are judged
Target brake fluid pressure is exported to the first group of brake caliper and second group of brake caliper for being extremely in different braking conduit.It is logical
Cross brake force request judgement, direction signal source, that is, vehicle form direction of usual brake force request, electronic stabilizing control system
ESC can judge vehicle heading by acceleration method.
The present invention provides a kind of vehicle braking method for energy two way, comprising the following steps:
1) respectively calibration vehicle with brake force needed for forward and reverse when driving front axle two-wheeled and rear axle two-wheeled；Due to vehicle
The difference of arrangement of parts, the weight at vehicle both ends is inconsistent, for example, one end of engine arrangement is usually heavier.Therefore,
When driving, the demand braking force of opposite front axle two-wheeled and rear axle two-wheeled is different vehicle forward and reverse.Pass through operating condition mark
Surely brake force required for forward and reverse travels can be obtained.
2) the first brake force source and the second brake force source are set；
3) the first power source exports brake force to front axle two-wheeled, and the second power source exports brake force to rear axle two-wheeled；
4) when vehicle forward travel is braked, the first brake force source the first brake force of output to front axle two-wheeled, second
Brake force source exports the second brake force to rear axle two-wheeled；
When vehicle backward going is braked, the first brake force source exports third brake force front axle two-wheeled, the second braking
Power source exports the 4th brake force to rear axle two-wheeled.
The invention mainly comprises: four double-piston brake calipers, two single-piston parking braking clamp, H-type brake piping,
MOC (Motor on Caliper) electric parking brake, electronic stabilizing control system ESC and two electric control hydraulic braking systems
The eBooster that unites is formed.Four identical double-piston brake calipers are mounted on four wheels, and H-type pipeline shows that vehicle is coaxial
Two wheel cylinders are in same brake circuit.Two single-piston parking braking clamp are separately mounted to two wheels of rear axle
On, corresponding is MOC electric parking brake, meets vehicle parking demand, is also more had to arrangement
Flexibility.The master cylinder of two electric control hydraulic braking system eBooster only one chamber, is connect by fluid pressure line with ESC,
ESC passes through H-type piping connection to four wheel cylinders again.Braking force distribution is reached by different front and back brake calipers from conventional truck
Method it is different, the brake caliper size of six wheels of the invention is just the same, passes through two electric control hydraulic braking systems
EBooster establishes different brake fluid pressures to two hydraulic circuits of antero posterior axis to realize braking force distribution, vehicle heading
When changing, two building for eBooster press target proportion that can change therewith, to meet two way characteristic to vehicle system
The demand of dynamic system.Present invention is particularly suitable for commercial vehicles, in addition in view of commercial vehicle quality itself is larger, to braking system
Capability Requirement is higher, therefore this programme uses double-piston brake caliper.
When driver's brake pedal, or have come self-retention Ride Control System brake force request when, two electricity
The vehicle drive side that the request of control brake fluid system eBooster combination brake force and electronic stabilizing control system ESC judge
To calculating separately respective hydraulic coupling target, and timely respond to this and build pressure target, complete brake request.No matter for forward direction
Traveling or backward going, two electric control hydraulic braking system eBooster can select suitable braking force distribution ratio,
So that forward and reverse actual braking force distribution curve when driving is as shown in Figure 2.
The present invention can satisfy demand of the bi-directional vehicle to braking system, no matter for forward travel or reversed row
It sails, two electric control hydraulic braking system eBooster can select suitable braking force distribution ratio, so that forward and reverse traveling
When actual braking force distribution curve it is as shown in Figure 2.Double-piston brake caliper is capable of providing bigger brake force simultaneously, meets quotient
With the braking requirement of vehicle.The present invention improves the safety of vehicle, pushes the development of intelligent driving technology instantly.
Detailed description of the invention
Present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:
Fig. 1 is orthodox car brake system structure schematic diagram.
Fig. 2 is braking curve analytical effect figure.
Fig. 3 is braking system schematic structural diagram of the second embodiment of the present invention.
Description of symbols
1 is double-piston front axle clamp
2 be single-piston rear axle clamp
3 be electric control hydraulic braking system
4 be electronic stabilizing control system
5 be electronic brake system
6 be H-type brake piping
7 be MOC electric parking brake
8 be double-piston rear axle clamp
9 be single-piston parking braking clamp
A is reversely to open unloaded I curve
B is reversely to be full of to carry I curve
C is reversely to open target beta curve
D is that forward direction opens target beta curve
E is that forward direction is full of load I curve
F is that forward direction opens unloaded I curve
Specific embodiment
The present invention is provided to the electric brake system first embodiments of energy bi-directional vehicle, include: six braking clamps
Pincers, brake piping, electric parking brake EPB, electronic stabilizing control system ESC and two electric control hydraulic braking systems
eBooster；
Six brake calipers are divided into three groups, and first group of brake caliper is mounted on automobile front-axle, second group and third group
Brake caliper is mounted on vehicle rear axle, after the motor that the electric parking brake EPB control is mounted on rear axle wheel clamps
Axis wheel third group brake caliper, described two electric control hydraulic braking system eBooster connect electronic stability by fluid pressure line
Control system ESC, the electronic stabilizing control system ESC are separately connected four wheel wheel cylinders by brake piping, described two
Electric control hydraulic braking system eBooster can export different braking power according to vehicle heading and return to different braking pipeline is located at
First group of brake caliper and second group of brake caliper on road.Six brake caliper sizes are identical, six brake calipers
Including four double-piston brake calipers and two single plug braking clamps, two double-piston brake calipers are divided into first group of braking clamp
Pincers, other two double-piston brake caliper are divided into second group of brake caliper, and two single plug brake calipers are divided into the braking of third group
Clamp.
As shown in figure 3, the present invention is provided to the electric brake system second embodiments of energy bi-directional vehicle, comprising:
Six brake calipers, brake piping, electric parking brake EPB, electronic stabilizing control system ESC and two electric control hydraulic brakings
System eBooster；
Six brake calipers are divided into three groups, and first group of brake caliper is mounted on automobile front-axle, second group and third group
Brake caliper is mounted on vehicle rear axle, after the motor that the electric parking brake EPB control is mounted on rear axle wheel clamps
Axis wheel third group brake caliper, the electric parking brake EPB is MOC electric parking brake, described two automatically controlled liquid
Braking system eBooster is pressed to connect electronic stabilizing control system ESC, the electronic stabilizing control system ESC by fluid pressure line
Four wheel wheel cylinders are separately connected by brake piping, described two electric control hydraulic braking system eBooster can be according to vehicle row
It sails direction and exports different braking power to the first group of brake caliper and second group of brake caliper for being located at different braking conduit, institute
Stating brake piping is H-type brake piping, and two coaxial tires are in same brake circuit, six brake calipers size phase
Together, six brake calipers include four double-piston brake calipers and two single plug braking clamps, two double-piston brake calipers
It is divided into first group of brake caliper, other two double-piston brake caliper is divided into second group of brake caliper, two single plug brakings
Clamp are divided into third group brake caliper.
The present invention is provided to the electric brake system 3rd embodiments of energy bi-directional vehicle, include: six braking clamps
Pincers, brake piping, electric parking brake EPB, electronic stabilizing control system ESC and two electric control hydraulic braking systems
eBooster；
Six brake calipers are divided into three groups, and first group of brake caliper is mounted on automobile front-axle, second group and third group
Brake caliper is mounted on vehicle rear axle, after the motor that the electric parking brake EPB control is mounted on rear axle wheel clamps
Axis wheel third group brake caliper, the electric parking brake EPB is MOC electric parking brake, described two automatically controlled liquid
Braking system eBooster is pressed to connect electronic stabilizing control system ESC, the electronic stabilizing control system ESC by fluid pressure line
The described two electric control hydraulic braking system eBooster of four wheel wheel cylinders are separately connected by brake piping to be asked according to brake force
The vehicle heading judged of summation electronic stabilizing control system ESC calculate separately respective target brake fluid pressure export to
First group of brake caliper and second group of brake caliper in different braking conduit, the brake piping is H-type brake pipe
Road, two coaxial tires are in same brake circuit, and six brake caliper sizes are identical, six brake caliper packets
Four double-piston brake calipers and two single plug braking clamps are included, two double-piston brake calipers are divided into first group of brake caliper,
Other two double-piston brake caliper is divided into second group of brake caliper, and two single plug brake calipers are divided into third group braking clamp
Pincers.
The present invention provides a kind of vehicle braking method for energy two way, comprising the following steps:
1) respectively calibration vehicle with brake force needed for forward and reverse when driving front axle two-wheeled and rear axle two-wheeled；Due to vehicle
The difference of arrangement of parts, the weight at vehicle both ends is inconsistent, for example, one end of engine arrangement is usually heavier.Therefore,
When driving, the demand braking force of opposite front axle two-wheeled and rear axle two-wheeled is different vehicle forward and reverse.Pass through operating condition mark
Surely brake force required for forward and reverse travels can be obtained.
2) the first brake force source and the second brake force source are set；
3) the first power source exports brake force to front axle two-wheeled, and the second power source exports brake force to rear axle two-wheeled；
4) when vehicle forward travel is braked, the first brake force source the first brake force of output to front axle two-wheeled, second
Brake force source exports the second brake force to rear axle two-wheeled；
When vehicle backward going is braked, the first brake force source exports third brake force front axle two-wheeled, the second braking
Power source exports the 4th brake force to rear axle two-wheeled.
Above by specific embodiment and embodiment, invention is explained in detail, but these are not composition pair
Limitation of the invention.Without departing from the principles of the present invention, those skilled in the art can also make many deformations and change
Into these also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of electric brake system can be used for the vehicle of two way characterized by comprising six brake calipers, braking
Pipeline, electric parking brake (EPB), electronic stabilizing control system (ESC) and two electric control hydraulic braking systems
(eBooster)；
Six brake calipers are divided into three groups, and first group of brake caliper is mounted on automobile front-axle, second group and the braking of third group
Clamp are mounted on vehicle rear axle, and the motor that electric parking brake (EPB) control is mounted on rear axle wheel clamps rear axle
Wheel third group brake caliper, described two electric control hydraulic braking systems (eBooster) connect electronic stability by fluid pressure line
Control system (ESC), the electronic stabilizing control system (ESC) is separately connected four wheel wheel cylinders by brake piping, described
Two electric control hydraulic braking systems (eBooster) can export different braking power to being located at different braking according to vehicle heading
The first group of brake caliper and second group of brake caliper of conduit.
2. electric brake system as described in claim 1, it is characterised in that: six brake caliper sizes are identical.
3. electric brake system as claimed in claim 2, it is characterised in that: six brake calipers include four double-piston systems
Moving calipers and two single plug brake calipers.
4. electric brake system as claimed in claim 3, it is characterised in that: two double-piston brake calipers are divided into first group of system
Moving calipers, other two double-piston brake caliper are divided into second group of brake caliper, and two single plug brake calipers are divided into third group
Brake caliper.
5. electric brake system as described in claim 1, it is characterised in that: the electric parking brake (EPB) is MOC electronics
Parking brake.
6. electric brake system as described in claim 1, it is characterised in that: the brake piping is H-type brake piping, coaxial
Two tires are in same brake circuit.
7. electric brake system as described in claim 1, it is characterised in that: described two electric control hydraulic braking systems
(eBooster) master cylinder only one chamber.
8. electric brake system as described in claim 1, it is characterised in that: when receiving brake request, described two automatically controlled liquid
The vehicle heading that pressure braking system (eBooster) is judged according to brake force request and electronic stabilizing control system (ESC)
Respective target brake fluid pressure is calculated separately to export to the first group of brake caliper and second for being in different braking conduit
Group brake caliper.
9. a kind of braking method, the vehicle for energy two way, which comprises the following steps:
1) respectively calibration vehicle with brake force needed for forward and reverse when driving front axle two-wheeled and rear axle two-wheeled；
2) the first brake force source and the second brake force source are set；
3) the first power source exports brake force to front axle two-wheeled, and the second power source exports brake force to rear axle two-wheeled；
4) when vehicle forward travel is braked, the first brake force source exports the first brake force to front axle two-wheeled, the second braking
Power source exports the second brake force to rear axle two-wheeled；
When vehicle backward going is braked, the first brake force source exports third brake force front axle two-wheeled, the second brake force source
The 4th brake force is exported to rear axle two-wheeled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619140.1A CN109733353A (en) | 2018-12-28 | 2018-12-28 | Electric brake system and braking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619140.1A CN109733353A (en) | 2018-12-28 | 2018-12-28 | Electric brake system and braking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109733353A true CN109733353A (en) | 2019-05-10 |
Family
ID=66361655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811619140.1A Pending CN109733353A (en) | 2018-12-28 | 2018-12-28 | Electric brake system and braking method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109733353A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2405819Y (en) * | 1999-12-30 | 2000-11-15 | 武汉元丰汽车零部件有限公司 | Double piston disc type brake for automobile |
| US20070262638A1 (en) * | 2006-05-09 | 2007-11-15 | Shinya Kodama | Vehicle and control method of vehicle |
| CN201305026Y (en) * | 2008-12-03 | 2009-09-09 | 苏州市德高电动车辆制造有限公司 | Four-wheel electromobile which can realize two-way driving |
| CN103167976A (en) * | 2010-10-18 | 2013-06-19 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Fault-secure parking brake for motor vehicles |
| CN107891854A (en) * | 2017-12-14 | 2018-04-10 | 湖北先行专用汽车有限公司 | A kind of automobile bidirectional driving braking clutch system |
| CN208006938U (en) * | 2018-02-05 | 2018-10-26 | 集瑞联合重工有限公司 | Two way special vehicle and its braking system |
-
2018
- 2018-12-28 CN CN201811619140.1A patent/CN109733353A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2405819Y (en) * | 1999-12-30 | 2000-11-15 | 武汉元丰汽车零部件有限公司 | Double piston disc type brake for automobile |
| US20070262638A1 (en) * | 2006-05-09 | 2007-11-15 | Shinya Kodama | Vehicle and control method of vehicle |
| CN201305026Y (en) * | 2008-12-03 | 2009-09-09 | 苏州市德高电动车辆制造有限公司 | Four-wheel electromobile which can realize two-way driving |
| CN103167976A (en) * | 2010-10-18 | 2013-06-19 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Fault-secure parking brake for motor vehicles |
| CN107891854A (en) * | 2017-12-14 | 2018-04-10 | 湖北先行专用汽车有限公司 | A kind of automobile bidirectional driving braking clutch system |
| CN208006938U (en) * | 2018-02-05 | 2018-10-26 | 集瑞联合重工有限公司 | Two way special vehicle and its braking system |
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Application publication date: 20190510 |
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