CN109823331A - A kind of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve and control method - Google Patents
A kind of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve and control method Download PDFInfo
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- CN109823331A CN109823331A CN201910082465.9A CN201910082465A CN109823331A CN 109823331 A CN109823331 A CN 109823331A CN 201910082465 A CN201910082465 A CN 201910082465A CN 109823331 A CN109823331 A CN 109823331A
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Abstract
The invention discloses a kind of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve and control methods, including upper valve body and lower valve body, upper valve body is set to the upper end of lower valve body, control chamber C is equipped in lower valve body, piston is equipped in control chamber C, control chamber C is separated into upper chamber and lower chambers by piston, upper chamber is connected separately with control mouth b and pressure relief vent a, electromagnetic control apparatus and dynamic iron core are equipped in upper valve body, electromagnetic control apparatus is sheathed between dynamic iron core and upper valve body, the lower end of dynamic iron core is connect with piston, dynamic iron core band piston is moved up and down along control chamber C, intake and exhaust valve is connected separately with exhaust outlet c, input port d and delivery outlet e, the opening and closing of the mobile control intake and exhaust valve of piston, delivery outlet e is set to be connected to or separate with exhaust outlet c and input port d；Air pressure transfer conduit is shortened, the propagation delay time of Pneumatic braking system is reduced, improves braking efficiency；Support vehicles safety, improves the safety of vehicle braking.
Description
Technical field
The present invention relates to automobile brake technical fields, and in particular to a kind of vehicle electrically controlling Pneumatic braking system compositely proportional
Relay valve and control method.
Background technique
Braking system is the core apparatus of support vehicles safety, and with the development of automatic Pilot technology, vehicle is to braking system
Performance requirement of uniting is also higher and higher.Pneumatic braking system is widely used in the heavily loaded commerial vehicle such as car, lorry, and occupying can not
The market position of substitution.But the problems such as due to air pressure propagation delay time, easily leakage generation under-voltage and pressure oscillation, lead to gas
It presses braking system when adapting to new driving environment, exposes more and more problems.Pacify to adapt to automatic Pilot and intelligence
The development of full technology develops into the important directions that air-pressure brake is changed to electronic control pneumatic brake.Electronic control pneumatic brake passes through electricity
Signal driving brake control valve opens or closes, and will greatly reduce propagation delay time, and then improve braking response rate；Pass through benefit
With can precise pressure regulation brake control valve, will real-time and precise carry out brake pressure adjusting.But it is existing in Pneumatic braking system
Some pressure regulator valves (ABS solenoid valve, relay valve etc.) cannot achieve real-time, precise pressure regulation, and pressure response time delay is longer, also can not be right
The problems such as brake chamber independence pressure regulation, and the research of electronic control pneumatic brake system is few, is especially the absence of for controlled pneumatic system
The automatic pressure regulator of dynamic system.In view of the above-mentioned problems, the present invention is directed to propose a kind of vehicle electrically controlling Pneumatic braking system from
Dynamic pressure regulator valve, it is consistent with goal pressure which can voluntarily adjust brake chamber pressure according to given goal pressure,
Intervention without driver carries out pressure regulation.Also, from vehicle safety and reliability, in conjunction with " fault-safety principle " original
Then, which backs up with air pressure, can maintain its stopping power in electrical malfunction.
Summary of the invention
The technical problem to be solved by the present invention is in view of the foregoing defects the prior art has, provide a kind of vehicle electrical
Pneumatic braking system compositely proportional relay valve and control method are controlled, air pressure transfer conduit is shortened, reduces compressed air brake system
The propagation delay time of system, improves braking efficiency；Support vehicles safety, improves the safety of vehicle braking.
Used technical solution is the present invention to solve above-mentioned technical problem:
A kind of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve, including upper valve body and lower valve body, upper valve body are set
It is placed in the upper end of lower valve body, control chamber C is equipped in lower valve body, is equipped with piston in control chamber C, control chamber C is separated by piston
Chamber and lower chambers, upper chamber are connected separately with control mouth b and pressure relief vent a, are equipped with electromagnetic control apparatus and dynamic iron in upper valve body
Core, electromagnetic control apparatus are sheathed between dynamic iron core and upper valve body, and the lower end of dynamic iron core is connect with piston, dynamic iron core band piston
It is moved up and down along control chamber C；
Be additionally provided with intake and exhaust valve, exhaust outlet c, input port d and delivery outlet e in lower valve body, the upper end of intake and exhaust valve with
Piston connection, exhaust outlet c, input port d and delivery outlet e are connect with intake and exhaust valve respectively, the mobile control intake and exhaust valve of piston
Opening and closing, so that delivery outlet e is connected to or is separated with exhaust outlet c and input port d, input port d is defeated for being connected to air accumulator
Outlet e with automobile brake chamber for being connected to, and control mouth b is connected to by controlled valve with air accumulator, and exhaust outlet c is used for and atmosphere
Connection.
According to above-mentioned technical proposal, the lower end of dynamic iron core and piston are socketed, and dynamic iron core driving piston moves down along control chamber C
It is dynamic.
According to above-mentioned technical proposal, electromagnetic control apparatus includes guide sleeve, magnetism-isolating loop, coil and static iron core, guide sleeve, magnetism-isolating loop
And coil is successively placed between dynamic iron core and upper valve body from inside to outside, static iron core is fixedly arranged on the bottom of upper valve body, covers in dynamic iron core
Equipped with the second return spring, the top and bottom of the second return spring are connect with dynamic iron core top and upper valve body lower part respectively.
According to above-mentioned technical proposal, the lower end of dynamic iron core is connected with push rod, and dynamic iron core is socketed by bearer ring and guide sleeve, is pushed away
Bar lower end is pierced by upper valve body bottom and connect with piston, and static iron core is sheathed between push rod and guide sleeve, is arranged in below dynamic iron core, the
Two return springs are sheathed between static iron core and push rod, the top and bottom of the second return spring respectively with dynamic iron core and upper valve body
Bottom connection.
According to above-mentioned technical proposal, bearer ring is equipped between guide sleeve and dynamic iron core.
According to above-mentioned technical proposal, intake and exhaust valve includes valve pocket, upper valve core and bottom spool, and valve pocket is sheathed on lower valve body
It is interior, bottom chamber is equipped between the lower end of valve pocket and the bottom of lower valve body, control chamber C is set in valve pocket, and upper valve core is sheathed on
In valve pocket, the lower chambers of control chamber C are protruded into the upper end of upper valve core, and bottom spool is set to bottom chamber, and the lower end of upper valve core is protruded into
Bottom chamber is simultaneously connect with bottom spool, and the first return spring, the top and bottom point of the first return spring are arranged on bottom spool
It is not connect with the lower part on the top of bottom spool and lower valve body, airspace, input port d is equipped between the lower end and valve pocket of upper valve core
It is connected to airspace, when bottom spool and upper valve core are bonded along the upper end that valve pocket is moved upward to bottom spool with valve pocket lower end,
Airspace and bottom chamber are separated, and input port d and delivery outlet e is separated, and exhaust passage, exhaust passage are equipped in the middle part of upper valve core
Upper end be connected to the lower chambers of control chamber C, the lower end of exhaust passage is connected to bottom chamber, when piston moves down compressing upper valve core
When moving down with bottom spool, piston is bonded with the upper surface of upper valve core, and the lower chambers partition of exhaust passage and control chamber makes defeated
E and exhaust outlet c is exported to separate.
According to above-mentioned technical proposal, third sealing ring is equipped between upper valve core and valve pocket, third sealing ring is set to ventilation
The upper end of the top in gap, bottom spool is equipped with the first sealing ring, and when bottom spool is bonded with valve pocket bottom, bottom spool passes through first
Sealing ring is bonded with valve pocket bottom, and the upper end of upper valve core is equipped with the 5th sealing ring, and when piston is bonded with upper valve core, piston passes through
5th sealing ring is bonded with upper valve core.
According to above-mentioned technical proposal, the second sealing ring and the 4th sealing ring, the second sealing are equipped between valve pocket and lower valve body
Circle and the 4th sealing ring be respectively set input port d lower section and it is lower on.
According to above-mentioned technical proposal, electromagnetic control apparatus is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, pressure
Power detection mouth f is equipped with pressure sensor, and controller is connect with pressure sensor.
According to above-mentioned technical proposal, electromagnetic control apparatus is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, pressure
Power detection mouth f is equipped with pressure sensor, and controller is connect with pressure sensor；
The control method the following steps are included:
1) target braking pressure p is set by controller1；
2) controller is by target braking pressure p1Corresponding current value is converted to, and is transferred to the line of electromagnetic control apparatus
Circle, exports corresponding electromagnetic force, and driving dynamic iron core longitudinal movement moves piston driving upper valve core and bottom spool；
3) controller detects delivery outlet pressure p by pressure sensor2；
4) electric current that controller is adjusted in the coil of electromagnetic control apparatus makes delivery outlet pressure p2With target braking pressure p1Phase
Deng.
The invention has the following advantages:
1. the present invention drives the controlled pneumatic of intake and exhaust valve to control by electromagnetic control apparatus, air pressure transfer tube is shortened
Road reduces the propagation delay time of Pneumatic braking system, passes through manual air-pressure brake support vehicles safety arrestment；In automatically controlled failure solution
After removing, the gas of control chamber can be discharged by pressure relief vent, restore electronic control pneumatic brake automatically, support vehicles safety improves vehicle
The safety of braking, the present apparatus have great importance to Pneumatic braking system performance is promoted.
2. control system is by being set to the pressure sensor of pressure detecting mouth, real-time detection output pressure, and with control
The goal pressure set in system compares, and automatic adjustment brake pressure is realized by the way of feedback regulation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve in the embodiment of the present invention；
In figure, 1- lower valve body, 2- valve pocket, 3- upper valve core, 4- bottom spool, the first sealing ring of 5-, the first return spring of 6-, 7-
Second sealing ring, 8- third sealing ring, the 4th sealing ring of 9-, the 5th sealing ring of 10-, 11- static iron core, 12- upper valve body, 13- line
Circle, 14- magnetism-isolating loop, 15- upper valve body end cap, 16- guide sleeve, 17- dynamic iron core, 18- bearer ring, the second return spring of 19-, 20- the
Six sealing rings, 21- piston, muffler built in 22-, a- pressure relief vent, b- control mouth, c- exhaust outlet, the input port d-, e- delivery outlet,
F- pressure detecting mouth, g- exhaust passage, C- control chamber.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Shown in referring to Fig.1, the vehicle electrically controlling Pneumatic braking system compositely proportional in one embodiment provided by the invention
Relay valve, including upper valve body 12 and lower valve body 1, upper valve body 12 are set to the upper end of lower valve body 1, are equipped with control chamber in lower valve body 1
Piston 21 is equipped in C, control chamber C, control chamber C is separated into upper chamber and lower chambers by piston 21, and the two sides of upper chamber connect respectively
It is connected to control mouth b and pressure relief vent a, is equipped with electromagnetic control apparatus and dynamic iron core 17 in upper valve body 12, electromagnetic control apparatus is sheathed on
Between dynamic iron core 17 and upper valve body 12, the lower end of dynamic iron core 17 passes through the bottom of upper valve body 12, protrudes into the control chamber C of lower valve body 1
In, it is connect with piston 21, dynamic iron core 17 is moved up and down with piston 21 along control chamber C；
Be additionally provided with intake and exhaust valve, exhaust outlet c, input port d and delivery outlet e in lower valve body 1, the upper end of intake and exhaust valve with
Piston 21 connects, and exhaust outlet c, input port d and delivery outlet e are connect with intake and exhaust valve respectively, the mobile control intake and exhaust of piston 21
The opening and closing of valve make delivery outlet e be connected to or separate with exhaust outlet c and input port d, and input port d is used to connect with air accumulator
Logical, delivery outlet e with automobile brake chamber for being connected to, and control mouth b is operated with manual switches valve and is connected to air accumulator, exhaust outlet c
For being communicated with the atmosphere.
Further, exhaust outlet c is equipped with built-in muffler 22.
Further, the lower end of dynamic iron core 17 and piston 21 are socketed, and dynamic iron core 17 drives piston 21 to move down along control chamber C
It is dynamic.
Further, 21 upper end of piston is equipped with a cylindrical groove, the 17 push rod lower end surface of dynamic iron core and the work
There are the gaps of certain distance for cylindrical groove bottom surface on plug 21.
Further, electromagnetic control apparatus includes guide sleeve 16, magnetism-isolating loop 14, coil 13 and static iron core 11, guide sleeve 16, every magnetic
Ring 14 and coil 13 are successively placed between dynamic iron core 17 and upper valve body 12 from inside to outside, and static iron core 11 is fixedly arranged on the bottom of upper valve body 12
Portion is arranged with the second return spring 19 in dynamic iron core 17, and the top and bottom of the second return spring 19 are respectively and in dynamic iron core 17
Portion is connected with 12 lower part of upper valve body；Second return spring 19 is that dynamic iron core 17 provides a upward spring-return power.
Further, the upper end of upper valve body 12 is equipped with upper valve body end cap 15, and upper valve body end cap 15 is by guide sleeve 16, magnetism-isolating loop
14, coil 13 and dynamic iron core 17 are packaged in the cavity of upper valve body 12.
Further, dynamic iron core 17 is longitudinally movable, and driving piston moves up and down, and opens or closes the exhaust of upper valve core 3
Channel；Lower valve body 1, piston and upper valve body 12 collectively form control chamber, control cavity pressure by adjusting, open or close upper valve core
3 exhaust passages；Piston moves up and down, and driving upper valve core 3 acts, and driving bottom spool is dynamic while closing 3 exhaust passage of upper valve core
Make, opens the channel between input port d and delivery outlet e；When the automatic pressure regulator is in original state, dynamic iron core 17 is
The top position is under the action of two return springs 19, piston is contacted with the 5th sealing ring 10 under self gravitation effect and closed
Close drain tap；Bottom spool is contacted with valve pocket 2 by the first sealing ring 5 under the action of the first return spring 6 and closes air inlet
Valve.
Further, intake and exhaust valve includes air intake valve and drain tap, and lower valve body 1 passes through the first sealing ring 5 and valve
Air intake valve is formed between set 2, piston is by forming drain tap between the 5th sealing ring 10 and valve pocket 2.
Further, the lower end of dynamic iron core 17 is connected with push rod, and dynamic iron core is socketed by bearer ring 18 and guide sleeve 16, push rod
Lower end is pierced by 12 bottom of upper valve body and connect with piston, and static iron core 11 is sheathed between push rod and guide sleeve 16, is arranged under dynamic iron core
Side, static iron core 11 are sheathed between static iron core 11 and push rod the position-limiting action that plays of dynamic iron core 17, the second return spring 19, the
The top and bottom of two return springs 19 are connect with dynamic iron core and 12 bottom of upper valve body respectively.
Further, bearer ring 18 is equipped between guide sleeve 16 and dynamic iron core 17, the number of bearer ring 18 is 2.
Further, intake and exhaust valve includes valve pocket 2, upper valve core 3 and bottom spool, and valve pocket 2 is sheathed in lower valve body 1, valve
Bottom chamber is equipped between the lower end of set 2 and the bottom of lower valve body 1, control chamber C is set in valve pocket 2, and upper valve core 3 is sheathed on valve
In set 2, the lower chambers of control chamber C are protruded into the upper end of upper valve core 3, and bottom spool is set to bottom chamber, and the lower end of upper valve core 3 is protruded into
Bottom chamber is simultaneously connect with bottom spool, and the first return spring 6, the top and bottom of the first return spring 6 are arranged on bottom spool
It is connect respectively with the lower part on the top of bottom spool and lower valve body 1, the first return spring 6 provides a upward spring for bottom spool
Restoring force is equipped with airspace between the lower end and valve pocket 2 of upper valve core 3, input port d is connected to airspace, when bottom spool with
When upper valve core 3 is bonded along the upper end that valve pocket 2 is moved upward to bottom spool with 2 lower end of valve pocket, airspace and bottom chamber are separated,
Separate input port d and delivery outlet e, exhaust passage, the upper end of exhaust passage and the cavity of resorption of control chamber C are equipped in the middle part of upper valve core 3
Room connection, the lower end of exhaust passage are connected to bottom chamber, when piston moves down compressing upper valve core 3 and bottom spool moves down,
Piston is bonded with the upper surface of upper valve core 3, the partition of the lower chambers of exhaust passage and control chamber, make delivery outlet e and exhaust outlet c every
It is disconnected.
Further, third sealing ring 8 is equipped between upper valve core 3 and valve pocket 2, third sealing ring 8 is set to airspace
Top, the upper end of bottom spool is equipped with the first sealing ring 5, and when bottom spool is bonded with 2 bottom of valve pocket, it is close to pass through first for bottom spool
Seal 5 is bonded with 2 bottom of valve pocket, and the upper end of upper valve core 3 is equipped with the 5th sealing ring 10, when piston is bonded with upper valve core 3, piston
It is bonded by the 5th sealing ring 10 with upper valve core 3.
Further, the second sealing ring 7 and the 4th sealing ring 9,7 He of the second sealing ring are equipped between valve pocket 2 and lower valve body 1
4th sealing ring 9 be respectively set input port d lower section and it is lower on.
Further, electromagnetic control apparatus is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, pressure detecting mouth
F is equipped with pressure sensor, and controller is connect with pressure sensor；Can real-time measurement brake chamber pressure, realize that brake pressure is real
When control, the external pressure sensor real-time detection brake chamber pressure of pressure detecting mouth, and being fed back in controller
Compared with target output pressure, the size of current of input coil 13 is can be changed in controller, to change the electricity of the output of dynamic iron core 17
Magnetic force size；Dynamic iron core 17 drives upper and lower valve core movement, adjusts bottom spool aperture, realizes braking process pressurization, pressure maintaining and decompression
While function, moreover it is possible to realize the real-time accurate adjusting of output pressure.
Control method using above-described vehicle electrically controlling Pneumatic braking system with compositely proportional relay valve, Electromagnetic Control
Device is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, and pressure detecting mouth f is equipped with pressure sensor, controller with
Pressure sensor connection；
The control method the following steps are included:
1) target braking pressure p is set by controller1；
2) controller is by target braking pressure p1Corresponding current value is converted to, and is transferred to the coil of electromagnetic control apparatus
13, corresponding electromagnetic force is exported, driving 17 longitudinal movement of dynamic iron core moves piston driving upper valve core 3 and bottom spool；
3) controller detects delivery outlet pressure p by pressure sensor2；
4) electric current that controller is adjusted in the coil 13 of electromagnetic control apparatus makes delivery outlet pressure p2With target braking pressure p1
It is equal.
Further, control mouth b is operated with manual switches valve and is connected to air accumulator, in the step 4), works as Electromagnetic Control
When plant failure, valve is turned on the switch, supplies control mouth b to control chamber C, pushes piston moves downward to open air inlet and exhaust valve
Door brakes brake chamber pressurization.
Further, the lower valve body 1 is equipped with control mouth, and control mouth connects air accumulator through manual switch valve, when system is disconnected
When electric fault, it can be supplied by control mouth to control chamber, push piston moves downward to open air intake valve, be pressurized brake chamber
Braking；Pressure relief vent, the pressure relief vent connection control chamber and atmosphere are additionally provided in the lower valve body 1, when vehicle is in system cut-off event
In the case of barrier implement braking after, can manual off switch valve, after pressure relief vent is discharged, piston moves up exhaust to be made the gas of control chamber
Brake release.
The working principle of the invention:
Electric-control system work normally when, dynamic iron core 17, piston, the 5th sealing ring 10, upper valve core 3, the first sealing ring 5 and under
Spool interconnection is integrated, can longitudinal movement convert electromagnetic force to the air pressure of automatic pressure regulator delivery outlet, 1 bottom of lower valve body
Pressure detecting mouth can by the pressure feedback of delivery outlet to control loop, then by change 13 electric current of coil change electromagnetism
Power size accurately controls output pressure size in real time.
When the automatic pressure regulator is in original state, the dynamic iron core 17 under the action of the second return spring 19 at
In the top position, the piston contacts with the 5th sealing ring 10 under self gravitation effect and closes drain tap, under described
Spool is contacted with valve pocket 2 by the first sealing ring 5 under the action of the first return spring 6 and closes air intake valve, the piston
Upper end is equipped with a cylindrical groove, and there are certain distances for cylindrical groove bottom surface on the 17 push rod lower end surface of dynamic iron core and the piston
Gap.
Further, the control mouth is connected to control chamber, the pressure relief vent and control chamber and atmosphere, the pressure
Detection mouth is connect with pressure sensor, and the input port is connected to air accumulator, and the control mouth is operated with manual switches valve and gas storage
Tank connection, the pressure detecting mouth are connected to delivery outlet.
When work of electromagnet failure, manual switch valve is opened, control gas enters control chamber by control mouth, pushes and lives
Plug moves downward opening air intake valve, makes brake chamber booster brake, closes manual switch valve, the gas of control chamber after the completion of braking
Body can be discharged by pressure relief vent.
The control method of the present invention also provides a kind of vehicle electrically controlling air-pressure brake automatic pressure regulator towards automatic Pilot, is adopted
It is returned with the control of above-described vehicle electrically controlling air-pressure brake automatic pressure regulator, the vehicle electrically controlling air-pressure brake automatic pressure regulator
Road includes electric control circuit and pneumatic control circuit, and the electric control circuit refers to that electromagnetic control apparatus, pneumatic control circuit refer to manual switch valve,
The control method are as follows:
(1) electronic control pneumatic brake system proposes the target braking pressure p of a certain brake chamber according to traveling state of vehicle1,
And by target braking pressure value p1In input controller；
(2) controller is by target braking pressure value p1It is converted to corresponding current value and is transferred to magnet spool 13,
Dynamic iron core 17 is set to export corresponding electromagnetic force, driving 17 longitudinal movement of dynamic iron core drives valve core movement；
(3) the output pressure p of the automatic pressure regulator is detected2；
(4) electric current adjusted in the electromagnet coil 13 makes p2With p1It is equal
(5) it when automatically controlled failure, into pneumatic control circuit operating mode, is supplied by control mouth to control chamber, pushes piston
Opening air intake valve is moved downward, makes to export pressure rise.
The course of work of the invention:
As shown in Figure 1, be a kind of vehicle electrically controlling air-pressure brake automatic pressure regulator, input port d, defeated is provided in lower valve body 1
E and exhaust outlet c is exported, the automatic pressure regulator is equipped with electromagnet, including dynamic iron core in upper valve body 12 and upper valve body end cap 15
17, static iron core 11, bearer ring 18, guide sleeve 16, magnetism-isolating loop 14, coil 13, the second return spring 19, the dynamic iron core 17 can be longitudinal
It is mobile；It is equipped with valve pocket 2 in the lower valve body 1, is equipped with piston 21, upper valve core 3, the lower valve body 1, piston 21 in the valve pocket 2
Control chamber C is collectively formed with upper valve body 12, is sealed between the piston 21 and valve pocket 2 by the 6th sealing ring 20, the piston
It is sealed between 21 and upper valve core 3 by the 5th sealing ring 10, constitutes drain tap, by the between the valve pocket 2 and lower valve body 1
Two sealing rings 7 and the sealing of the 4th sealing ring 9, are sealed between the upper valve core 3 and valve pocket 2 by third sealing ring 8, the upper valve
It is equipped with an exhaust passage g inside core 3 and is communicated with delivery outlet e；It is equipped with bottom spool 4 in the lower valve body 1, passes through the first sealing ring
5 constitute air intake valve with valve pocket 2, and drain tap and air intake valve collectively constitute intake and exhaust valve, be equipped with below the bottom spool 4
First return spring 6, the lower valve body 1 are equipped with control mouth b, pressure relief vent a and pressure detecting mouth f.Electric-control system works normally,
The dynamic iron core 17, piston 21, the 5th sealing ring 10, upper valve core 3, the first sealing ring 5 and the interconnection of bottom spool 4 are integrated,
Can longitudinal movement convert electromagnetic force to the air pressure of automatic pressure regulator delivery outlet e, the pressure detecting mouth f of 1 bottom of lower valve body can will
Then the pressure feedback of delivery outlet e accurately controls output pressure size by changing electromagnetic force size to control loop in real time.
When the automatic pressure regulator is in original state, the dynamic iron core 17 is under the action of the second return spring 19 in topmost
Position, the piston 21 contact with the 5th sealing ring 10 under self gravitation effect and close drain tap, and the bottom spool 4 exists
It is contacted by the first sealing ring 5 with valve pocket 2 under the action of first return spring 6 and closes air intake valve, 21 upper end of piston
Equipped with a cylindrical groove, there are between certain distance for cylindrical groove bottom surface on dynamic iron core push rod lower end surface and the piston 21
Gap.The control mouth b is connected to control chamber C, the pressure relief vent a and control chamber C and atmosphere, the pressure detecting mouth f with
Pressure sensor connection, the input port d are connected to air accumulator, and the control mouth b is operated with manual switches valve and is connected to air accumulator,
The pressure detecting mouth f is connected to delivery outlet e.When work of electromagnet failure, manual switch valve is opened, control gas passes through control
Donsole b enters control chamber C, pushes piston 21 to move downward opening air intake valve, makes brake chamber booster brake, after the completion of braking
Manual switch valve is closed, the gas of control chamber C can be discharged by pressure relief vent a.
As shown in Figure 1, the device install when, input port d is connect with air accumulator, control mouth b be operated with manual switches valve and
Air accumulator connection, delivery outlet e connect the diaphragm chamber of brake chamber.When original state, manual switch valve is closed, air intake valve and exhaust
Valve is also switched off.When condition of road surface or vehicle kinematics change, braking system is calculated by Full Vehicle Dynamics model
The target pressure value p of each brake chamber out1, and by target pressure value p1Corresponding controller is inputted, in the controller by target pressure
Force value p1Be converted into input current value, thus control input current reach coil 13, move downward dynamic iron core 17 and generate with
The thrust that input current matches, under the thrust of dynamic iron core 17, piston 21, which moves downward, pushes upper valve core 3 together with lower valve
Core 4 moves downwardly together, to open air intake valve, the compressed air of input port d is made to enter brake chamber by delivery outlet e,
Brake chamber pressure rise.Meanwhile the compressed gas of delivery outlet e can reach the lower chamber of piston 21 by exhaust passage g, when
When delivery outlet hypertonia, piston 21, upper valve core 3 and bottom spool 4 move upwards under the action of cavity gas chamber's air pressure under piston 21
It closes air intake valve and opens drain tap, pressure reduction is discharged by drain tap in the gas of brake chamber, as delivery outlet e
When pressure is lower, piston 21 pushes upper valve core 3 and bottom spool 4 to move down, and closes drain tap and opens air intake valve, brake chamber fills
Atmospheric pressure increases again, and the above process is adjusted repeatedly keeps output pressure consistent with input current, to realize input constant current value
Corresponding brake pressure output.The pressure detecting mouth f being arranged at delivery outlet e connects pressure sensor, acquires the pressure of delivery outlet e in real time
Force data simultaneously feeds back to controller, and controller is by feedback pressure force value p2Compared with target pressure value p1, convert pressure difference value to
Input current changing value simultaneously corrects input current size, while modified input current input coil 13 is made piston by controller
21 and spool reach new balance, to correct the pressure of brake chamber.When pressure sensor detects the pressure value of delivery outlet
p2Higher than target pressure value p1When, controller reduces the current value of input coil 13, and the thrust output of dynamic iron core 17 is caused to subtract
Small, piston 21, upper valve core 3 and bottom spool 4 move upwardly together, bottom spool 4 under the limitation of the first return spring 6 and valve pocket 2,
Air intake valve is closed, piston 21 continues up, and opens drain tap, and the compressed gas of delivery outlet e is passed through by exhaust passage g
Exhaust outlet c row Xiang great Qi is crossed, to make the pressure reduction of brake chamber, when delivery outlet pressure p2It is reduced to piston 21 and spool again
When secondary balance, drain tap is closed, and brake chamber pressure is corrected；When pressure sensor detects the pressure value p of delivery outlet2It is low
In target pressure value p1When, controller increases the current value of input coil 13, causes the thrust output of dynamic iron core 17 to increase, pushes away
Piston 21, upper valve core 3 and bottom spool 4 move downwardly together, close drain tap and open air intake valve, brake chamber inflation
Pressure rise, when delivery outlet pressure p2It is increased to piston 21 and when spool balances again, air intake valve is closed, brake chamber pressure
It is corrected again.Above-mentioned feedback regulation process repeats, and adjusts output pressure p2With goal pressure p1Unanimously, to reach real
When, accurate, separately adjustable brake chamber pressure purpose.After the completion of braking process, 13 power loss of coil, 17 thrust output of dynamic iron core
It is zero and returns to initial position under the action of the second return spring 19, piston 21 and spool move upwards closing air intake valve,
Drain tap is opened, the compressed gas of brake chamber is all discharged by exhaust passage g through exhaust outlet c, to release braking.
When disconnection fault occurs in electric-control system, magnet control partial failure is still able to achieve brake chamber pressurization, completes
Braking process.The manual switch valve on front side of control mouth b is opened, compressed gas enters control chamber C by control mouth, control chamber C's
Air pressure, which increases, pushes piston 21 to move downward closing drain tap, and then pushes upper valve core 3 to be connected to bottom spool 4 and transport downwardly together
It is dynamic, intake valve valve is opened, the compressed gas of input port d enters delivery outlet e by air intake valve, and brake chamber is pressurized, thus
Complete braking.After the completion of braking, the manual switch valve on front side of control mouth b is closed, the gas of control chamber C can be arranged by pressure relief vent a
Out, while the gas of brake chamber can be discharged from drain tap by exhaust outlet c by exhaust passage g, to automatically terminate system
It is dynamic.
In conclusion the present invention shortens air pressure transfer conduit, reduces air-pressure brake towards electronic control pneumatic brake system
The propagation delay time of system；The present invention uses the separately adjustable brake chamber pressure of electric signal, and come real by the way of feedback regulation
It is adjusted when real；Even if the present invention can also pass through manual air-pressure brake support vehicles safety arrestment in automatically controlled failure；Automatically controlled
After trouble shooting, the gas of control chamber can be discharged by pressure relief vent, restore electronic control pneumatic brake automatically.
Above is only presently preferred embodiments of the present invention, and of course, the scope of rights of the present invention cannot be limited by this,
Therefore according to equivalence changes made by scope of the present invention patent, still belong to protection scope of the present invention.
Claims (10)
1. a kind of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve, which is characterized in that including upper valve body and lower valve body,
Upper valve body is set to the upper end of lower valve body, and control chamber C is equipped in lower valve body, is equipped with piston in control chamber C, and piston is by control chamber C
It is separated into upper chamber and lower chambers, upper chamber is connected separately with control mouth b and pressure relief vent a, is equipped with Electromagnetic Control in upper valve body and fills
It sets and dynamic iron core, electromagnetic control apparatus is sheathed between dynamic iron core and upper valve body, the lower end of dynamic iron core is connect with piston, dynamic iron core
Band piston is moved up and down along control chamber C；
Intake and exhaust valve, exhaust outlet c, input port d and delivery outlet e, the upper end of intake and exhaust valve and piston are additionally provided in lower valve body
Connection, exhaust outlet c, input port d and delivery outlet e are connect with intake and exhaust valve respectively, and the mobile control intake and exhaust valve of piston is opened
It opens and closes, delivery outlet e is made to be connected to or separate with exhaust outlet c and input port d, input port d with air accumulator for being connected to, delivery outlet
For being connected to automobile brake chamber, control mouth b is connected to by controlled valve with air accumulator e, and exhaust outlet c is used to connect with atmosphere
It is logical.
2. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 1, which is characterized in that dynamic iron
The lower end of core and piston are socketed, and dynamic iron core driving piston is moved up and down along control chamber C.
3. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 1, which is characterized in that electromagnetism
Control device includes guide sleeve, magnetism-isolating loop, coil and static iron core, and guide sleeve, magnetism-isolating loop and coil are successively placed on dynamic iron core from inside to outside
Between upper valve body, static iron core is fixedly arranged on the bottom of upper valve body, and the second return spring, the second return spring are arranged in dynamic iron core
Top and bottom connect respectively with dynamic iron core top and upper valve body lower part.
4. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 3, which is characterized in that dynamic iron
The lower end of core is connected with push rod, and dynamic iron core is socketed by bearer ring and guide sleeve, and push rod lower end is pierced by upper valve body bottom and piston connects
It connects, static iron core is sheathed between push rod and guide sleeve, is arranged in below dynamic iron core, and the second return spring is sheathed on static iron core and push rod
Between, the top and bottom of the second return spring are connect with dynamic iron core and upper valve body bottom respectively.
5. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 4, which is characterized in that guide sleeve
Bearer ring is equipped between dynamic iron core.
6. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 1, which is characterized in that into row
Air valve includes valve pocket, upper valve core and bottom spool, and valve pocket is sheathed in lower valve body, between the lower end of valve pocket and the bottom of lower valve body
Equipped with bottom chamber, control chamber C is set in valve pocket, and upper valve core is sheathed in valve pocket, and control chamber C's protruded into the upper end of upper valve core
Lower chambers, bottom spool are set to bottom chamber, and the lower end of upper valve core is protruded into bottom chamber and connect with bottom spool, covers on bottom spool
Equipped with the first return spring, the top and bottom of the first return spring connect with the top of bottom spool and the lower part of lower valve body respectively
It connects, airspace is equipped between the lower end and valve pocket of upper valve core, input port d is connected to airspace, when bottom spool and upper valve core
When being bonded along the upper end that valve pocket is moved upward to bottom spool with valve pocket lower end, airspace and bottom chamber are separated, and make input port d
Separate with delivery outlet e, exhaust passage is equipped in the middle part of upper valve core, the upper end of exhaust passage is connected to the lower chambers of control chamber C, is vented
The lower end in channel is connected to bottom chamber, when piston moves down compressing upper valve core and bottom spool moves down, piston and upper valve core
Upper surface fitting, the lower chambers of exhaust passage and control chamber separate, and separate delivery outlet e and exhaust outlet c.
7. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 6, which is characterized in that upper valve
Third sealing ring is equipped between core and valve pocket, third sealing ring is set to the top of airspace, and the upper end of bottom spool is equipped with the
One sealing ring, when bottom spool is bonded with valve pocket bottom, bottom spool is bonded by the first sealing ring with valve pocket bottom, upper valve core
Upper end is equipped with the 5th sealing ring, and when piston is bonded with upper valve core, piston is bonded by the 5th sealing ring with upper valve core.
8. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 1, which is characterized in that valve pocket
The second sealing ring and the 4th sealing ring are equipped between lower valve body, input port d is respectively set in the second sealing ring and the 4th sealing ring
Lower section and it is lower on.
9. vehicle electrically controlling Pneumatic braking system compositely proportional relay valve according to claim 1, which is characterized in that electromagnetism
Control device is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, and pressure detecting mouth f is equipped with pressure sensor, control
Device is connect with pressure sensor.
10. special using the control method of vehicle electrically controlling Pneumatic braking system compositely proportional relay valve described in claim 1
Sign is that electromagnetic control apparatus is connected with controller, and delivery outlet e is connected with pressure detecting mouth f, and pressure detecting mouth f is equipped with pressure
Sensor, controller are connect with pressure sensor；
The control method the following steps are included:
1) target braking pressure p is set by controller1；
2) controller is by target braking pressure p1Corresponding current value is converted to, and is transferred to the coil of electromagnetic control apparatus, is exported
Corresponding electromagnetic force, driving dynamic iron core longitudinal movement open or close piston driving intake and exhaust valve；
3) controller detects delivery outlet pressure p by pressure sensor2；
4) electric current that controller is adjusted in the coil of electromagnetic control apparatus makes delivery outlet pressure p2With target braking pressure p1It is equal.
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| CN201910082465.9A CN109823331B (en) | 2019-01-28 | 2019-01-28 | Composite proportional relay valve for vehicle electric control air brake system and control method |
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| CN201910082465.9A CN109823331B (en) | 2019-01-28 | 2019-01-28 | Composite proportional relay valve for vehicle electric control air brake system and control method |
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| CN109823331B CN109823331B (en) | 2020-08-25 |
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| CN111591274A (en) * | 2020-06-11 | 2020-08-28 | 西安正昌电子股份有限公司 | Electric dual-type brake signal transmitter |
| CN111766060A (en) * | 2020-06-24 | 2020-10-13 | 武汉理工大学 | Testing device and testing method for automatic pressure regulating valve of electric control air brake system |
| CN112218724A (en) * | 2019-08-30 | 2021-01-12 | 深圳市大疆创新科技有限公司 | Agricultural plant protection unmanned aerial vehicle's machine carries sprinkler structure, sprinkling system and unmanned aerial vehicle |
| CN113665554A (en) * | 2021-09-25 | 2021-11-19 | 山东交通学院 | Air-break brake relay valve and unfreezing control method thereof |
| CN114593214A (en) * | 2022-03-02 | 2022-06-07 | 中国铁道科学研究院集团有限公司 | Rail transit output control valve |
| WO2023000362A1 (en) * | 2021-07-19 | 2023-01-26 | 武汉理工大学 | Automatic pressure regulation valve of electro-pneumatic braking system of commercial vehicle and control method |
| WO2023000363A1 (en) * | 2021-07-19 | 2023-01-26 | 武汉理工大学 | Automatic pressure-regulating valve suitable for multi-level driving automation of commercial vehicle, and control method therefor |
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| CN113665554B (en) * | 2021-09-25 | 2022-04-22 | 山东交通学院 | Air-break brake relay valve and unfreezing control method thereof |
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Effective date of registration: 20211013 Address after: 272619 No. 8, Huayu Road, industrial park, quanpu Town, Liangshan County, Jining City, Shandong Province Patentee after: SHANDONG KANGJIAN AUTO PARTS TECHNOLOGY Co.,Ltd. Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 Patentee before: WUHAN University OF TECHNOLOGY |
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