CN109941258A - A kind of double electric cylinder timesharing are from primary brake system and its braking method - Google Patents
A kind of double electric cylinder timesharing are from primary brake system and its braking method Download PDFInfo
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- CN109941258A CN109941258A CN201910325678.XA CN201910325678A CN109941258A CN 109941258 A CN109941258 A CN 109941258A CN 201910325678 A CN201910325678 A CN 201910325678A CN 109941258 A CN109941258 A CN 109941258A
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- 239000012530 fluid Substances 0.000 claims description 23
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- 239000010985 leather Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 4
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- 230000010355 oscillation Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 229910000831 Steel Inorganic materials 0.000 description 2
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- 230000004044 response Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
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Abstract
The present invention provides a kind of double electric cylinder timesharing from primary brake system and its braking method, including power supply (3) and brake monitor (2), it further include the first electric cylinder (1a) and the second electric cylinder (1b) being electrically connected with the brake monitor (2), first electric cylinder (1a) and the second electric cylinder (1b) are respectively connected to two wheel drags on automobile, connecting pipe between any one wheel drag and the first electric cylinder (1a) and the second electric cylinder (2b) is provided with the solenoid valve being electrically connected with brake monitor (2), braking method provided by the invention includes autonomous braking mode and fail-safe braking mode, the present invention passes through the unlatching and power-off of solenoid valve, realize the on-off of electric cylinder output brake pressure and brake, the control for brake and ABS function of single wheel can be achieved Can, to improve the reliability of braking system.
Description
Technical field
The present invention relates to automobiles from primary brake system, in particular to a kind of double electric cylinder timesharing are from primary brake system and its system
Dynamic method.
Background technique
Brake system of car is closely related safely with running.The brake fluid system of orthodox car is all led to by driver
It crosses brake pedal and applies brake pressure in the wheel cylinder of each wheel drag, brake to realize and make vehicle deceleration.It is advanced
The personal vehicle systems such as driving assistance system (ADAS) and automated driving system (ADS) require braking system that can implement to vehicle
From main brake, i.e., part or all of wheel is applied in the case where non-brake pedal and braked.Current implementable autonomous system
Dynamic braking system mostly uses greatly electric boosted, and remains the brake control devices such as brake pedal.And unmanned logistics is matched
The development for sending vehicle, due to no longer needing brake control device, this mode is not applicable.And the existing autonomous system for ADS exploitation
Dynamic system lacks fail-safe function, and security performance is lower.
In order to improve the reliability and travel safety of braking, brake system of car generally uses mutually independent double loop
Structure, another circuit remains to continue braking action when guaranteeing that a circuit breaks down and fails.Therefore, ADS is aimed to open
Hair be not only considered as from primary brake system continue to use traditional wheel drag as far as possible, it is also contemplated that using double loop redundancy knot
Structure.
Double loop at this stage controls a wheel drag using every primary Ioops mostly from primary brake system, when 4 vehicles
There is locking in one of wheel, and when locking does not occur in another wheel or brake force deficiency occurs, double-circuit braking system can only
The brake pressure of two wheels is reduced simultaneously, causes the dangerous of braking.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, it is high and there is fail-safe to provide a kind of brake safe coefficient
Double electric cylinder timesharing of function are from primary brake system and its braking method.
The present invention solves the above problems the technical scheme adopted is that a kind of double electric cylinder timesharing are wrapped from primary brake system
Power supply and brake monitor are included, further includes the first electric cylinder and the second electric cylinder being electrically connected with the brake monitor, it is described
First electric cylinder is connected to form the first braking time with the first wheel drag and the second wheel drag being set on automobile
Road, second electric cylinder are connected to form the second system with the third wheel drag and four-wheel brakes being set on automobile
Dynamic circuit；
On brake piping between first electric cylinder and first wheel drag and the second wheel drag
It is respectively arranged with the first solenoid valve and second solenoid valve, second electric cylinder and the third wheel drag and the 4th vehicle
Third solenoid valve and the 4th solenoid valve, first solenoid valve, second are respectively arranged on brake piping between wheel brake
Solenoid valve, third solenoid valve and the 4th solenoid valve are electrically connected with the brake monitor.
In some embodiments, first electric cylinder is identical as the structure of the second electric cylinder, include electronic rigid cylinder body,
Be slideably positioned in the intracorporal piston of the electric cylinder cylinder, driving piston sliding motor and with the electric cylinder cylinder body
The fluid reservoir of connection, the motor are electrically connected with the brake monitor；
The first cavity and the second cavity, the piston and the electricity are formed between the piston and the electric cylinder cylinder body
Return unit is provided between dynamic cylinder cylinder body；
It is offered on the electric cylinder cylinder body: being connected to the fluid reservoir and the compensation hole of the first cavity, is connected to the liquid storage
The drainage hole of tank and the confession fluid apertures of the second cavity and connection first cavity and corresponding wheel drag group；
Leather cup is provided on the piston, when the return unit is under preloading condition, the leather cup is located at the compensation
Between hole and confession fluid apertures.
In some embodiments, ball wire bar pair, the rolling are additionally provided in first electric cylinder and the second electric cylinder
Ballscrew pair includes by the motor-driven rolled thread nut and the screw rod coupled with the piston.In some embodiments,
The electro-hydraulic autonomous braking system in double loop further includes the shell connecting with the electric cylinder cylinder body, the ball wire bar pair setting
In in the shell；
The inside of the shell is cylindrical hollow configuration, internal the first circle including being connected and diameter is sequentially increased
Cylindrical cavity, the second cylindrical cavity and third cylindrical cavity, first cylindrical cavity and the second cylindrical cavity
Between be provided with closing surface, the through-hole passed through for the screw rod is offered on the closing surface；Second cylindrical cavity with
The shaft shoulder is formed between the third cylindrical cavity, the rolled thread nut is rotatablely arranged in the third cylinder, and institute
The one end for stating rolled thread nut is fixed on the shaft shoulder by bearing；The shell is close to one end of the first piston along axial direction
Boss is extended outward to form, the boss matches to merge with the sealing of the opening of the electric cylinder cylinder body to be fixedly connected.
In some embodiments, it is further fixedly arranged on and leads on first electric cylinder and the electric cylinder cylinder body of the second electric cylinder
To pin, the guide groove with guide pin cooperation is offered on the screw rod, it is described to lead when the return unit is in preloading condition
It is abutted to one end of the close piston of slot with the guide pin.
In some embodiments, the return unit is spring, is arranged between the electric cylinder cylinder body and the piston.
In some embodiments, first solenoid valve, second solenoid valve, third solenoid valve and the 4th solenoid valve are
Normally open type magnetic valve.
In some embodiments, the electro-hydraulic self-control system in the double loop further includes being electrically connected with the brake monitor
Braking light switch and malfunction indicator lamp.
In some embodiments, first wheel drag is right front brake, and second wheel drag is a left side
Front brake, the third wheel drag are right rear brake, and the 4th wheel is left back brake；Or first vehicle
Wheel brake is right front brake, and second wheel drag is left back brake, and the third wheel drag is left front
Brake, the 4th wheel are right rear brake.
The present invention also provides a kind of double electric cylinder timesharing from the braking method of primary brake system, including following braking mould
Formula:
Autonomous braking mode: when system fault-free and the brake monitor detects that other electric-control systems of vehicle have certainly
When main brake is requested, the brake monitor calculates first electricity according to the size of the braking deceleration of autonomous brake request
The target torque of the motor of dynamic cylinder and the second electric cylinder, and the motor output torque is controlled, by controlling each solenoid valve
It opens and closes and the positive and negative rotation of the motor is realized to adjust the oil liquid pressure in brake piping in wheel drag
Wheel cylinder brake pressure pressurization and decompression, complete from main brake；
Fail-safe braking mode: when the brake monitor detect one of brake circuit break down when and its
When autonomous brake request occurs in his electric-control system, the brake monitor is calculated according to the braking deceleration size of brake request
Brake force needed for the brake circuit not failed, and it is converted into the target torque of the motor, then control the motor output
Torque, by controlling the opening and closing of solenoid valve and the positive and negative rotation of the motor, to adjust the system for the brake circuit that do not fail
Oil liquid pressure in dynamic pipeline, realizes the pressurization and decompression to the wheel cylinder brake pressure in wheel drag, completes fail-safe
Braking.
Advantages of the present invention are as follows:
1. electric cylinder timesharing braking systems of the invention double exempt from manual brakings' manipulation device such as brake pedal, structure is simple, at
This is low, arrangement is convenient；
2. electronic the cylinder piston is driven by motor from primary brake system in electric cylinder timesharing of the invention double, build that the pressure time is short, braking
Response is fast；
3. electric cylinder timesharing of the invention double from primary brake system because using two it is mutually indepedent and be mutually redundant it is electro-hydraulic from
Main brake circuit, therefore the high reliablity of braking system, fail-safe ability are strong；
4. double autonomous timesharing braking systems of electric cylinder of the invention can pass through electromagnetism because using four mutually independent solenoid valves
The on-off of valve is precisely controlled the brake pressure and braking time of each brake, therefore the high reliablity of braking system, fail-safe
Ability is strong.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of double autonomous timesharing braking systems of electric cylinder of the present invention；
Fig. 2 is a kind of the first electric cylinder of double autonomous timesharing braking systems of electric cylinder of the present invention and the structure of the second electric cylinder
Schematic diagram；
Fig. 3 is that a kind of solenoid valve of double autonomous timesharing braking systems of electric cylinder of the present invention is opened and power-off time distribution diagram.
In figure, the first electric cylinder of 1a-；The second electric cylinder of 1b-；2-brake monitors；3-power supplys；4-the first wheel
Brake；5-the second wheel drag；6-third wheel drags；7-the four-wheel brakes；8-the first solenoid valve；
9-second solenoid valves；10-third solenoid valves；11-the four solenoid valve；12-braking light switch；13-malfunction indicator lamp；
101-motors；102-shaft couplings；103-rolled thread nuts；104-bearings；105-retaining rings；106-steel balls；107-screw rods；
108-shells；109-O-rings；110-guide pins；111-sealing rings；112-pistons；113-leather cups；114-bolts；
115-fluid reservoirs；116-return units；117-electric cylinder cylinder bodies；The second cavity of A-；B-confession fluid apertures；C-compensation hole；D-
One cavity；E-drainage hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 2 referring to Fig.1, a kind of double electric cylinder timesharing further include from primary brake system, including power supply 3 and brake monitor 2
The the first electric cylinder 1a and the second electric cylinder 1b, the first electric cylinder 1a being electrically connected with the brake monitor 2 be set to
The first wheel drag 4 on automobile is connected to form the first brake circuit with the second wheel drag 5, second electric cylinder
2b is connected to form the second brake circuit with the third wheel drag 6 and four-wheel brakes 7 being set on automobile；
Brake pipe between the first electric cylinder 1a and first wheel drag 4 and the second wheel drag 5
Road is respectively arranged with the first solenoid valve 8 and second solenoid valve 9, the second electric cylinder 1b and the third wheel drag 6
And third solenoid valve 10 and the 4th solenoid valve 11 are respectively arranged on the brake piping between four-wheel brakes 7, it is described
First solenoid valve 8, second solenoid valve 9, third solenoid valve 10 and the 4th solenoid valve 11 are electrically connected with the brake monitor 2
It connects.Shown in referring to Fig.1, pass through opening to the first solenoid valve 8, second solenoid valve 9, third solenoid valve 10 and the 4th solenoid valve 11
It opens and closes, the connection and closing that are connected thereto pipeline to corresponding electric cylinder may be implemented.
The first electric cylinder 1a is identical as the structure of the second electric cylinder 1b, includes electric cylinder cylinder body 117, sliding setting
The motor 101 that slides in piston 112, the driving piston 112 in the electric cylinder cylinder body 117 and with the electric cylinder
The fluid reservoir 115 that cylinder body 117 connects, the motor 101 are electrically connected with the brake monitor 3.
Referring to Fig.1 with Fig. 3, the working principle of the invention is: the positive and negative rotation of motor 101 can export a pressure oscillation,
So that the oil liquid pressure in brake piping will appear opposite high pressure and low pressure, i.e., when motor 101 rotates forward, formed in brake piping
High-voltage oil liquid, and when the reversion of motor 101, low pressure oil liquid is formed in brake piping.
If the wheel cylinder brake pressure of some wheel drag needs to enhance, braking control can be passed through in short time t2
Device 2 processed makes corresponding solenoid valve power-off, and then solenoid valve oil circuit is open-minded, is at this time high-pressure brake liquid in brake piping, can pass through electromagnetism
Valve enhances the brake pressure in wheel drag until corresponding wheel drag；Other time solenoid valves then solenoid valve
Oil circuit is closed, and is at this time low pressure brake fluid in brake piping, brake, the pressure in brake can not be transferred to by solenoid valve
It is remained unchanged in short time, the wheel cylinder brake pressure for gradually enhancing wheel drag repeatedly can be achieved in loop cycle.
Conversely, if can be made in short time t1 by brake monitor 2 when some wheel cylinder brake pressure needs to reduce
Then solenoid valve oil circuit is open-minded for corresponding solenoid valve power-off, is at this time low pressure brake fluid in main brake pipeline, can be straight by solenoid valve
To brake, the brake pressure in brake is reduced；Other time solenoid valves then close by solenoid valve oil circuit, at this time brake pipe
Lu Liwei high-pressure brake liquid can not be transferred to brake by solenoid valve, remain unchanged in the pressure short time in brake, week
Phase circulation repeatedly can be achieved to gradually reduce wheel cylinder brake pressure.
In the present embodiment, the first cavity D and second is formed between the piston 112 and the electric cylinder cylinder body 117
Cavity A, is provided with return unit 116 between the piston 112 and the electric cylinder cylinder body 117；It is opened on the electric cylinder cylinder body 117
Be equipped with: be connected to the fluid reservoir 115 with the compensation hole C of the first cavity D, be connected to the feed flow of the fluid reservoir 115 and the second cavity A
The drainage hole E of hole B and connection the first cavity D and the corresponding wheel drag group；
Leather cup 113 is provided on the piston 112, when the return unit 116 is under preloading condition, the leather cup 113
Between the compensation hole and confession fluid apertures.Leather cup 113 with piston 112 movement, may be implemented the unlatching to compensation hole C and
It closes.Here preloading condition refers to, in effect of the return unit 116 not by power, one kind for being according to its position
Original state.Drainage hole E is also provided on the electric cylinder cylinder body 117, the drainage hole E is connected to automobile by connecting pipe
Wheel drag.
It is additionally provided with ball wire bar pair in the first electric cylinder 1a and the second electric cylinder 1b, the ball wire bar pair includes
The rolled thread nut 103 driven by the motor 101, the screw rod 107 and steel ball 106 that couple with the piston 112.Specifically,
Motor 101 is coupled with rolled thread nut 103 by shaft coupling 102.The electro-hydraulic autonomous braking system in double loop further include with it is described
The shell 108 that electric cylinder cylinder body 117 connects, electric cylinder cylinder body 117 and shell 108 use bolt-connection, sealing ring 111 after fastening
It is pressed at joint surface and seals.Ball wire bar pair is supported in shell 108 by a pair of bearings 104.Pass through motor 101
The rotation of rolled thread nut 103 is driven, so that screw rod 107 pushes piston 112.
Specifically, the inside of the shell 108 is cylindrical hollow configuration, internal includes being connected and diameter successively increases
Big the first cylindrical cavity, the second cylindrical cavity and third cylindrical cavity, first cylindrical cavity and second
It is provided with closing surface between cylindrical cavity, the through-hole passed through for the screw rod 107 is offered on the closing surface；It is set on through-hole
It is equipped with O-ring 109.The shaft shoulder, the rolled thread nut are formed between second cylindrical cavity and the third cylindrical cavity
103 are rotatablely arranged in the third cylinder, and one end of the rolled thread nut 103 is fixed on by a pair of bearings 104
On the shaft shoulder；Retaining ring 105 is used for 104 axially position of bearing and limits the axial movement of rolled thread nut 103.The shell 108
One end close to the piston 112 extends axially outwardly to form boss, the opening of the boss and the electric cylinder cylinder body 117
Sealing is fixedly connected with merging.
In addition, being further fixedly arranged on guiding on the electric cylinder cylinder body 117 of the first electric cylinder 1a and the second electric cylinder 1b
Pin 110, the guide groove with the guide pin 110 cooperation is offered on the screw rod 107, and the return unit 116 is in precompressed shape
When state, the guide groove is abutted close to one end of the piston 112 with the guide pin 110.Here preloading condition and above
In preloading condition it is equivalent in meaning.110 one end of guide pin is inserted into the guide groove of screw rod 107, so that screw rod 107 can only be along axis
And it cannot be around axial rotation to translation；It is located at electric cylinder cylinder body 117 by the piston 112 that bolt 114 and screw rod 107 are fixedly connected
Interior, 107 guide groove of screw rod is pressed against on guide pin 110 close to 112 one end of piston under the effect of 116 precompression of return unit, the limit
Position makes leather cup 113 axial between compensation hole C and confession fluid apertures B.
In the present embodiment, first solenoid valve 8, second solenoid valve 9, third solenoid valve 10 and the 4th solenoid valve 11
It is normally open type magnetic valve.When solenoid valve powers off, then solenoid valve oil circuit is open-minded.
In the present embodiment, the return unit 116 is spring, and one end is connect with the electric cylinder cylinder body 117, the other end
It is connect with the piston 112.
The brake monitor 3 is additionally coupled to other electric-control systems of automobile.Other electric-control systems are such as ADAS or ADS
The electric-control system of autonomous brake request can be issued.
The electro-hydraulic self-control system in double loop further includes the braking light switch 8 being electrically connected with the brake monitor 3
With malfunction indicator lamp 9.Braking light switch 8 is used to light the Brake lamp of automobile, if brake monitor 2 detects the system that system occurs
When dynamic loop fault, alarm is issued by lighting malfunction indicator lamp 9.
The connection type of first electric cylinder 1a and the second electric cylinder 1b and Brack for automobile wheel can there are many, in this reality
It applies in example, the first electric cylinder 1a is connected to the front wheel brake of automobile, i.e. right front brake and left front brake；Second electric cylinder
1b is connected to the rear wheel brake of automobile, i.e., right rear brake and left back brake.Connection type is the connection of H-type circuit in this.
And function of the invention also may be implemented in another X-type circuit connection, i.e. the first electric cylinder 1a and the second electric cylinder 1b connects respectively
A front wheel brake and rear wheel brake are connect, for example, the first electric cylinder 1a is connected to right front brake and left back brake, the
Two electric cylinder 1b are connected to right rear brake and left front brake.
The specific brake control method and the course of work of autonomous braking and fail-safe braking are illustrated below.
Brake control method and the course of work under autonomous braking mode
Autonomous braking mode is worked in when system fault-free.
If brake monitor 3 detects that other electric-control systems such as ADAS or ADS of vehicle have autonomous brake request, first
Brake force is converted into according to the braking deceleration size of request and distributes to each wheel；Further, the target of each wheel is calculated
The target torque of the motor 101 of brake force and the first electric cylinder 1a and the second electric cylinder 1b, then respectively to two motors
Torque command is issued, the quick positive and negative rotation of motor 101 is allowed to export a pressure oscillation, driving ball wire bar pair pushes away when motor rotates forward
Piston 112 moves；First cavity D is built after covering all compensation hole C with the synkinematic leather cup 113 of piston 112 1
Pressure is erected, which is transferred to brake piping through drainage hole E, so that brake-pipe pressure be made to increase.It is driven when motor reversal
Ball wire bar pair reversion, under acting on return spring 116, the translation of screw rod 107 pulls piston 112 to move right together, brakes
Pipeline and drainage hole E are connected to the first cavity D, the first cavity D is connected to the compensated hole C of fluid reservoir 115, to make brake piping
Pressure reduction.The quick positive and negative rotation of motor so in a short time, so that it may generate a pressure oscillation in brake piping.
If the wheel cylinder brake pressure of some wheel drag needs to enhance, braking control can be passed through in short time t2
Device 2 processed makes corresponding solenoid valve power-off, and then solenoid valve oil circuit is open-minded, is at this time high-pressure brake liquid in brake piping, can pass through electromagnetism
Valve enhances the brake pressure in wheel drag until corresponding wheel drag；Other time solenoid valves then solenoid valve
Oil circuit is closed, and is at this time low pressure brake fluid in brake piping, brake, the pressure in brake can not be transferred to by solenoid valve
It is remained unchanged in short time, the wheel cylinder brake pressure for gradually enhancing wheel drag repeatedly can be achieved in loop cycle, realizes autonomous
Braking.
Conversely, if can be made in short time t1 by brake monitor 2 when some wheel cylinder brake pressure needs to reduce
Then solenoid valve oil circuit is open-minded for corresponding solenoid valve power-off, is at this time low pressure brake fluid in main brake pipeline, can be straight by solenoid valve
To brake, the brake pressure in brake is reduced；Other time solenoid valves then close by solenoid valve oil circuit, at this time brake pipe
Lu Liwei high-pressure brake liquid can not be transferred to brake by solenoid valve, remain unchanged in the pressure short time in brake, week
Phase circulation repeatedly can be achieved to gradually reduce wheel cylinder brake pressure, realize from main brake.
When other electric-control systems request to terminate braking, brake monitor 2 enables the first electric cylinder 1a and the second electric cylinder 1b
Motor 101 stop working, screw rod 107 stop apply axial force in piston 112；Piston 112 and screw rod 107 are in return spring
Initial position is returned under 116 effects, the rotor of ball nut 103, shaft coupling 102 and motor 101 drives backspin in screw rod 107
Turn and also returns to initial position；The wheel cylinder of each brake is connected to through brake piping and drainage hole E with the first cavity D, the first chamber
Body D is connected to the compensated hole C of fluid reservoir 115, thus pressure of wheel braking cylinder each brake releasing after reducing.
Brake control method and the course of work under fail-safe braking mode
When a brake circuit breaks down, system works in fail-safe braking mode.
If brake monitor 2 detects that a brake circuit failure occurs in system, sent out by lighting malfunction indicator lamp 13
It alarms out.Under the fault mode of one brake circuit failure, if receiving the brake request from other electric-control systems, first
Brake force is converted into according to the braking deceleration size of request and distributes to each wheel for the brake circuit that do not fail, is then controlled not
The motor output torque of failure brake circuit, exports a pressure oscillation, passes through and controls corresponding solenoid valve on-off, output to system
The certain pressure of dynamic device, to realize that fail-safe is braked.The target braking of each wheel in the case where determining fail-safe braking mode
When power, the torque capacity of corresponding motor should not exceed, or require to determine according to specific embodiment and referring to relevant laws and regulations.
Brake release under fail-safe braking mode is identical as autonomous braking mode.
Advantages of the present invention are as follows:
1. electric cylinder timesharing braking systems of the invention double exempt from manual brakings' manipulation device such as brake pedal, structure is simple, at
This is low, arrangement is convenient；
2. electronic the cylinder piston is driven by motor from primary brake system in electric cylinder timesharing of the invention double, build that the pressure time is short, braking
Response is fast；
3. electric cylinder timesharing of the invention double from primary brake system because using two it is mutually indepedent and be mutually redundant it is electro-hydraulic from
Main brake circuit, therefore the high reliablity of braking system, fail-safe ability are strong.
4. double autonomous timesharing braking systems of electric cylinder of the invention can pass through electromagnetism because using four mutually independent solenoid valves
The on-off of valve is precisely controlled the brake pressure and braking time of each brake, therefore the high reliablity of braking system, fail-safe
Ability is strong.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of double electric cylinder timesharing are from primary brake system, including power supply (3) and brake monitor (2), which is characterized in that also wrap
Include the first electric cylinder (1a) and the second electric cylinder (1b) being electrically connected with the brake monitor (2), first electric cylinder
(1a) is connected to form the first braking time with the first wheel drag (4) and the second wheel drag (5) being set on automobile
Road, second electric cylinder (2b) are connected with the third wheel drag (6) and four-wheel brakes (7) being set on automobile
Form the second brake circuit；
Braking between first electric cylinder (1a) and first wheel drag (4) and the second wheel drag (5)
The first solenoid valve (8) and second solenoid valve (9), second electric cylinder (1b) and the third wheel are respectively arranged on pipeline
Third solenoid valve (10) and the 4th are respectively arranged on brake piping between brake (6) and four-wheel brakes (7)
Solenoid valve (11), first solenoid valve (8), second solenoid valve (9), third solenoid valve (10) and the 4th solenoid valve (11) are equal
It is electrically connected with the brake monitor (2).
2. double electric cylinder timesharing according to claim 1 are from primary brake system, which is characterized in that first electric cylinder
(1a) is identical as the structure of the second electric cylinder (1b), includes electric cylinder cylinder body (117), is slideably positioned in the electric cylinder cylinder body
(117) piston (112) in, driving piston (112) sliding motor (101) and with the electric cylinder cylinder body (117)
The fluid reservoir (115) of connection, the motor (101) are electrically connected with the brake monitor (3)；
The first cavity and the second cavity, the piston are formed between the piston (112) and the electric cylinder cylinder body (117)
(112) it is provided between the electric cylinder cylinder body (117) return unit (116)；
It is offered on the electric cylinder cylinder body (117): being connected to the fluid reservoir (115) and the compensation hole of the first cavity, is connected to institute
State the drain of fluid reservoir (115) with the confession fluid apertures of the second cavity and connection first cavity and corresponding wheel drag group
Hole；
It is provided with leather cup (113) on the piston (112), when the return unit (116) is under preloading condition, the leather cup
(113) between the compensation hole and confession fluid apertures.
3. double electric cylinder timesharing according to claim 2 are from primary brake system, which is characterized in that first electric cylinder
Ball wire bar pair is additionally provided in (1a) and the second electric cylinder (1b), the ball wire bar pair includes being driven by the motor (101)
Dynamic rolled thread nut (103) and the screw rod (107) coupled with the piston (112).
4. double electric cylinder timesharing according to claim 3 are from primary brake system, which is characterized in that the double loop it is electro-hydraulic from
Primary brake system further includes the shell (108) connecting with the electric cylinder cylinder body (117), and the ball wire bar pair is set to described
In shell (108)；
The inside of the shell (108) is cylindrical hollow configuration, and internal includes being connected and diameter is sequentially increased first
Cylindrical cavity, the second cylindrical cavity and third cylindrical cavity, first cylindrical cavity and the second cylindrical empty
It is provided with closing surface between chamber, the through-hole passed through for the screw rod (107) is offered on the closing surface；Described second is cylindrical
The shaft shoulder is formed between cavity and the third cylindrical cavity, the rolled thread nut (103) is rotatablely arranged at the third
In cylinder, and one end of the rolled thread nut (103) is fixed on the shaft shoulder by bearing (104)；The shell (108) is leaned on
One end of the nearly first piston (112) extends axially outwardly to form boss, the boss and the electric cylinder cylinder body (117)
Opening sealing with merge be fixedly connected.
5. double electric cylinder timesharing according to claim 3 are from primary brake system, which is characterized in that first electric cylinder
It is further fixedly arranged on guide pin (110) on the electric cylinder cylinder body (117) of (1a) and the second electric cylinder (1b), the screw rod (107)
On offer with the guide pin (110) cooperation guide groove, when the return unit (116) is in preloading condition, the guiding
Slot is abutted close to one end of the piston (112) with the guide pin (110).
6. double electric cylinder timesharing according to claim 2 are from primary brake system, which is characterized in that the return unit (116)
For spring, it is arranged between the electric cylinder cylinder body (117) and the piston (112).
7. double electric cylinder timesharing described in -6 any one are from primary brake system according to claim 1, which is characterized in that described
One solenoid valve (8), second solenoid valve (9), third solenoid valve (10) and the 4th solenoid valve (11) are normally open type magnetic valve.
8. double electric cylinder timesharing described in -6 any one are from primary brake system according to claim 1, which is characterized in that described double
The electro-hydraulic self-control system in circuit further includes the braking light switch (12) and indicating fault being electrically connected with the brake monitor (2)
Lamp (13).
9. double electric cylinder timesharing described in -6 any one are from primary brake system according to claim 1, which is characterized in that described
One wheel drag (4) is right front brake, and second wheel drag (5) is left front brake, the third wheel system
Dynamic device (6) are right rear brake, and the four-wheel brakes (7) are left back brake；Or first wheel drag (4)
For right front brake, second wheel drag (5) is left back brake, and the third wheel drag (6) is left front system
Dynamic device, the four-wheel brakes (7) are right rear brake.
10. a kind of braking side for carrying out automobile brake from primary brake system using double electric cylinder timesharing as described in claim 1
Method, which is characterized in that including following braking mode:
Autonomous braking mode: when system fault-free and the brake monitor (2) detects that other electric-control systems of vehicle have certainly
When main brake is requested, the brake monitor (2) calculates described the according to the size of the braking deceleration of autonomous brake request
The target torque of the motor (101) of one electric cylinder (1a) and the second electric cylinder (1b), and control the motor (101) output and turn
Square, by controlling the opening and closing of each solenoid valve and the positive and negative rotation of the motor (101), to adjust in brake piping
Oil liquid pressure realizes pressurization and decompression to the wheel cylinder brake pressure in wheel drag, completes from main brake；
Fail-safe braking mode: when the brake monitor (2) detect one of brake circuit break down when and its
When autonomous brake request occurs in his electric-control system, the brake monitor (2) is according to the big subtotal of braking deceleration of brake request
Brake force needed for calculating the brake circuit not failed, and it is converted into the target torque of the motor (101), then described in control
Motor (101) output torque, by controlling the opening and closing of solenoid valve and the positive and negative rotation of the motor (101), to adjust
The oil liquid pressure not failed in the brake piping of brake circuit, realize to the pressurization of the wheel cylinder brake pressure in wheel drag with
Fail-safe braking is completed in decompression.
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| CN201910325678.XA CN109941258A (en) | 2019-04-22 | 2019-04-22 | A kind of double electric cylinder timesharing are from primary brake system and its braking method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602384A (en) * | 2012-03-27 | 2012-07-25 | 清华大学 | Distributed type electronic hydraulic braking system of automobile |
| CN102700538A (en) * | 2012-06-14 | 2012-10-03 | 清华大学 | Distributed electronic hydraulic braking system for vehicle |
| CN103552556A (en) * | 2013-11-18 | 2014-02-05 | 扬州泰博汽车电子智能科技有限公司 | Dual-motor BBW (brake-by-wire) system with multiple working modes and voltage regulation modes |
| JP2015058840A (en) * | 2013-09-19 | 2015-03-30 | 日立オートモティブシステムズ株式会社 | Vehicle fluid pressure brake control device |
| CN207190803U (en) * | 2017-09-21 | 2018-04-06 | 安徽机电职业技术学院 | A kind of car for guarding against side turned over control device |
| CN108443368A (en) * | 2018-05-12 | 2018-08-24 | 宁波多维吉汽车科技有限公司 | A kind of servo brake cylinder, braking system and braking method for distributed composite braking system |
| CN210971029U (en) * | 2019-04-22 | 2020-07-10 | 南京经纬达汽车科技有限公司 | Double-electric-cylinder time-sharing autonomous braking system |
-
2019
- 2019-04-22 CN CN201910325678.XA patent/CN109941258A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602384A (en) * | 2012-03-27 | 2012-07-25 | 清华大学 | Distributed type electronic hydraulic braking system of automobile |
| CN102700538A (en) * | 2012-06-14 | 2012-10-03 | 清华大学 | Distributed electronic hydraulic braking system for vehicle |
| JP2015058840A (en) * | 2013-09-19 | 2015-03-30 | 日立オートモティブシステムズ株式会社 | Vehicle fluid pressure brake control device |
| CN103552556A (en) * | 2013-11-18 | 2014-02-05 | 扬州泰博汽车电子智能科技有限公司 | Dual-motor BBW (brake-by-wire) system with multiple working modes and voltage regulation modes |
| CN207190803U (en) * | 2017-09-21 | 2018-04-06 | 安徽机电职业技术学院 | A kind of car for guarding against side turned over control device |
| CN108443368A (en) * | 2018-05-12 | 2018-08-24 | 宁波多维吉汽车科技有限公司 | A kind of servo brake cylinder, braking system and braking method for distributed composite braking system |
| CN210971029U (en) * | 2019-04-22 | 2020-07-10 | 南京经纬达汽车科技有限公司 | Double-electric-cylinder time-sharing autonomous braking system |
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Application publication date: 20190628 |