CN109501791B - Integrated EPB valve assembly and EPB electronic parking brake system - Google Patents
Integrated EPB valve assembly and EPB electronic parking brake system Download PDFInfo
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- CN109501791B CN109501791B CN201811158783.0A CN201811158783A CN109501791B CN 109501791 B CN109501791 B CN 109501791B CN 201811158783 A CN201811158783 A CN 201811158783A CN 109501791 B CN109501791 B CN 109501791B
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- 238000004891 communication Methods 0.000 claims abstract description 21
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 8
- 230000010354 integration Effects 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to the field of electronic parking brake systems, and discloses an integrated EPB valve assembly and an EPB electronic parking brake system, wherein the valve cavity comprises a cavity A, a cavity B and a cavity C formed by the upper end surface of a relay piston and the inner wall of the valve cavity in an enclosing way, the cavity A and the cavity B are disconnected or communicated through the valve assembly, and a pneumatic control two-position three-way valve is connected with an air inlet, a standby pressure electromagnetic valve and a two-position three-way electromagnetic valve; the electromagnetic two-position three-way electromagnetic valve controls the communication of the C cavity and the pneumatic control two-position three-way valve, the relay piston moves downwards and is used for opening the valve assembly to control the communication of the A cavity and the B cavity, and the B cavity is communicated with the air outlet; an exhaust channel N is arranged on the valve body and is communicated with the exhaust port, and the pressure reducing electromagnetic valve controls the air passage communication of the cavity C and the exhaust channel N. The valve body is high in integration degree, convenient in pipeline arrangement and capable of preventing sediment from being blocked by internal respiration.
Description
Technical Field
The invention relates to the field of automobile electronic parking brake systems, in particular to an integrated EPB valve assembly and an EPB electronic parking brake system.
Background
EPB: an electric park brake system is an electronic control unit (NCU) and integrated EPB valve assembly which changes a conventional manual valve and a quick release valve into an integrated EPB valve assembly, and combines other systems and logic. The automobile safety control system has the advantages of compact structure, complete functions and the like. The traditional conventional parking brake is composed of a manual control valve, a cab connecting pipeline and a quick release valve for parking, and has the following defects: 1) Because the manual control valve and the cab connecting pipeline are required to be arranged in the cab of the traditional parking system, the space utilization rate is low; 2) The parking function can be realized only by single function; 3) The pipeline arrangement and the installation are complicated, and the maintenance is also troublesome.
In addition, in the use process of the automobile, sediment and dust on the road surface are easy to adhere to the valve body, if the external breathing type exhaust device is adopted, the situation of blocking the external breathing valve is generated after the time is long, so that the normal operation of the integrated EPB valve assembly is influenced, and the braking performance of the whole automobile is influenced under serious conditions.
Disclosure of Invention
In order to overcome the defects of the technology, the invention provides an integrated EPB valve assembly and an EPB electronic parking brake system, wherein the integrated EPB valve assembly has the functions of conventional parking, hill start assistance, emergency braking, automatic parking, forgetting prevention, parking, low-pressure protection and the like; removing the manual control valve, connecting a cab pipeline and a quick release valve for parking; improves the driving safety and the operation comfort of a driver
In order to solve the technical problems, the invention is solved by the following technical scheme:
the integrated EPB valve assembly comprises a body, a standby electromagnetic valve, a pressure reducing electromagnetic valve, a two-position three-way electromagnetic valve and a pneumatic control two-position three-way valve are arranged in a valve body, a relay piston is arranged in the relay valve, a valve assembly and an exhaust guide seat arranged at the bottom are arranged on a lower valve body, and an exhaust port is arranged on the exhaust guide seat; the valve body is also provided with an air inlet and an air outlet, a valve cavity is arranged in the valve body, the valve cavity comprises a cavity A, a cavity B and a cavity C which is formed by the upper end surface of the relay piston and the inner wall of the valve cavity, the cavity A and the cavity B are disconnected or communicated through a valve assembly, the pneumatic control two-position three-way valve is connected with the air inlet, the standby pressure electromagnetic valve and the two-position three-way electromagnetic valve, and the on-off control pneumatic control two-position three-way valve of the standby pressure electromagnetic valve is communicated or disconnected with a gas path communicated to the cavity C; the electromagnetic two-position three-way electromagnetic valve controls the communication of the C cavity and the pneumatic control two-position three-way valve, the relay piston moves downwards and is used for opening the valve assembly to control the communication of the A cavity and the B cavity, and the B cavity is communicated with the air outlet; an exhaust channel N is arranged on the valve body and is communicated with the exhaust port, and the pressure reducing electromagnetic valve controls the air passage communication of the cavity C and the exhaust channel N. The whole valve body has the advantages of high integration degree, small occupied space, simple pipeline arrangement and the like, and is long in service life and not easy to damage in an internal respiration mode.
Preferably, the valve body comprises an upper valve body and a lower valve body, the upper end of the upper valve body is provided with an upper cover assembly, the standby electromagnetic valve, the two-position three-way electromagnetic valve and the pressure reducing electromagnetic valve are arranged in the upper valve body and are communicated with the air passage of the lower valve body, the relay piston, the valve assembly, the exhaust guide seat, the air inlet and the air outlet are all arranged on the lower valve body, the upper valve body is also provided with a plug, the upper valve body is internally provided with an EPB electronic control unit, and the EPB electronic control unit is electrically connected with the pressure reducing electromagnetic valve, the standby electromagnetic valve and the two-position three-way electromagnetic valve. The control unit is adopted to realize the automatic control of various functions of the valve body, and the EPB control unit is internally provided with the advantages of high integration degree, small influence from the outside, convenience in maintenance and replacement and the like.
Preferably, the pneumatic control two-position three-way valve comprises an air taking connector and a first valve cavity, the first valve cavity comprises a valve core cavity provided with a first valve core and a first piston cavity close to one end of the air taking connector, the first piston is arranged in the first piston cavity, the first piston and the air taking connector enclose a cavity D, the valve core cavity comprises a cavity E and a cavity F, the first piston drives the first valve core to control the cavity E and the cavity F to be communicated or disconnected, and the cavity E is communicated with the air inlet; the two-position three-way electromagnetic valve comprises an L cavity, an O cavity and a J cavity, the L cavity and the O cavity are communicated, the two-position three-way electromagnetic valve is in a power-off state, and the O cavity and the J cavity are communicated; the J cavity is communicated with the D cavity, the O cavity is communicated with the C cavity, and the E cavity is communicated with the L cavity; the standby electromagnetic valve comprises a P cavity and a Q cavity, wherein the F cavity is communicated with the P cavity, the Q cavity is communicated with the C cavity, and the standby electromagnetic valve core controls the communication between the P cavity and the Q cavity. The control is accurate between each valve body, and each valve body intercommunication all is connected through built-in passageway moreover to make each process more stable, it is more reliable. And the device is convenient for later examination and maintenance, and simultaneously facilitates the control of the communication between the electromagnetic valves and the cavities.
Preferably, a back pressure exhaust passage K is provided in the spool chamber, and the back pressure exhaust passage K communicates with the passage N. The internal respiration exhaust mode is adopted, so that the whole valve body is prevented from being blocked, particulate matters such as sediment, dust and the like can be effectively prevented from entering the valve body by the internal respiration exhaust passage, and the condition that a breather valve arranged on the valve body is blocked and fails under severe working conditions is avoided.
Preferably, one end of the first valve core is matched with the first piston, and a first spring is arranged at the other end of the first valve core and abuts against the end face, far away from the first piston, of the valve core cavity.
Preferably, a manual stop valve for forcedly releasing the parking brake is arranged in the air taking connector, and the manual stop valve is communicated with the D cavity. The function of forcibly releasing the parking brake can be realized.
Preferably, the device also comprises a control port, wherein the control port is communicated with the C cavity through an air passage; a valve rod is arranged in the valve cavity, the relay piston is sleeved on the valve rod, and the N channel penetrates through the middle of the valve rod. The control port can ensure that the electromagnetic valve can not be electrified or used under other emergency conditions, and the driving under the anti-superposition mode is realized.
Preferably, a one-way valve is arranged in a channel of the air inlet communicated with the cavity A, and a filter element and a muffler assembly are arranged on the exhaust guide seat.
The invention also provides an EPB electronic parking brake system, which comprises the integrated EPB valve assembly, wherein the air outlet comprises a first air outlet, a second air outlet, a third air outlet and a fourth air outlet, the electronic parking brake system further comprises an air storage cylinder, a spring brake cylinder parking cavity and a trailer module, the air inlet is connected with the air storage cylinder, the first air outlet and the second air outlet are both connected with the spring brake cylinder parking cavity, the fourth air outlet is connected with the air inlet of the trailer module, the control port is connected with the air brake valve, and the third air outlet is connected with the control port of the trailer module.
The invention has the remarkable technical effects due to the adoption of the technical scheme: the invention removes a manual control valve, a cab connecting pipeline and a quick release valve for parking, and provides an integrated EPB valve assembly, which has the functions of conventional parking, hill start assistance, emergency braking, automatic parking, forgetting prevention, parking, low pressure protection and the like; removing the manual control valve, connecting a cab pipeline and a quick release valve for parking; the driving safety is improved, and the operation comfort of a driver is improved. And the whole valve body has the advantages of long service life, convenient maintenance, small occupied space, high integration degree and the like.
The invention also provides a method for removing the breather valve on the valve body, and arranging an inner breathing type air exhaust passage in the valve body. The internal respiration type exhaust passage can effectively prevent particles such as sediment, dust and the like from entering the valve body, and avoid the situation that a breather valve arranged on the valve body is blocked and fails under severe working conditions; compared with the condition that the exhaust device (the breather valve) is arranged on the outer wall of the valve body, the cost can be effectively reduced, and the maintenance is convenient; and meanwhile, the exhaust passage is arranged at the sides of the piston and the valve rod, so that the situation that the piston generates back pressure when the piston moves can be solved. And can solve when the gas leakage appears in the valve body or other circumstances lead to in the casing atmospheric pressure rise influence last valve body and go up the valve body part security problem, the high-pressure gas in the last valve body can exhaust with the mode of interior exhaust.
Drawings
Fig. 1 is a schematic diagram of a front view structure of the present embodiment.
Fig. 2 is a schematic left-view structure of the present embodiment.
Fig. 3 is a schematic top view of the present embodiment.
Fig. 4 is a schematic view of the structure taken along line a-a in fig. 2.
Fig. 5 is a schematic view showing a sectional structure along b-b in fig. 2.
Fig. 6 is a schematic view of the structure taken along d-d in fig. 3.
Fig. 7 is a schematic view of the structure taken along c-c in fig. 2.
Fig. 8 is a partial enlarged view of fig. 4.
Fig. 9 is a pneumatic connection diagram of the EPB electronic parking brake system.
The names of the parts indicated by the numerical references in the drawings are as follows: the valve comprises an upper cover assembly, an EPB electronic control unit, an upper valve body, a control port, a 5 air taking connector, a 6 small piston, a 7 lower valve body, an 8 special-shaped sealing ring, a 9 check valve, a 10 decompression electromagnetic valve, an 11 air inlet, a 12 valve rod, a 13 valve assembly, a 14 return spring, a 15 exhaust guide seat, a 16 muffler assembly, a 17 spare pressure electromagnetic valve, a 18 two-position three-way electromagnetic valve, a 19 relay piston, a 20 control port connector, a 21 first air outlet, a 22 second air outlet, a 24 reserved port, a 25 third air outlet, a 12/26 and a fourth air outlet. 27. The diaphragm, 28, seven-core plug, 29, exhaust port, 31-pneumatic control two-position three-way valve, 311-first valve core, 312-valve core cavity, 313-first piston cavity, 32-insert rod, 612-auxiliary air outlet channel, 613-air outlet port, 61-piston body, 314-first spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. Letters in the names of the technologies in this detailed description are stated to serve only as a sign distinguishing technical feature, and should not be construed as limiting the shape of the technical feature.
Example 1
As shown in fig. 1 to 8, the integrated EPB valve assembly comprises a body, wherein a pressure-equipped solenoid valve 17, a pressure-reducing solenoid valve 10, a two-position three-way solenoid valve 18, a pneumatic control two-position three-way valve 31, a relay piston 19 are arranged in a valve body, a valve assembly 13 and an exhaust guide seat 15 arranged at the bottom are arranged on a lower valve body 7, and an exhaust port 29 is arranged on the exhaust guide seat 15; the valve body is also provided with an air inlet 11 and an air outlet, a valve cavity is arranged in the valve body, the valve cavity comprises a cavity A, a cavity B and a cavity C which is formed by the upper end surface of the relay piston 19 and the inner wall of the valve cavity, the cavity A and the cavity B are disconnected or communicated through a valve assembly 13, a pneumatic control two-position three-way valve 31 is connected with the air inlet 11, a standby pressure electromagnetic valve 17 and a two-position three-way electromagnetic valve 18, and a gas path communicated with the cavity C is connected or disconnected by a power-on control pneumatic control two-position three-way valve 31 of the standby pressure electromagnetic valve 17; the electromagnetic two-position three-way electromagnetic valve 18 controls the communication between the C cavity and the pneumatic control two-position three-way valve 31, and the relay piston 19 moves downwards to open the valve assembly 13 to control the communication between the A cavity and the B cavity, and the B cavity is communicated with the air outlet; the valve body is provided with an exhaust channel N which is communicated with an exhaust port 29, and the pressure reducing electromagnetic valve 10 controls the air passage communication between the cavity C and the exhaust channel N.
The valve body comprises an upper valve body 3 and a lower valve body 7, in this embodiment, the upper valve body 3 comprises a housing and a connecting portion 330 integrally formed at the bottom of the housing. The connection part 330 of the lower valve body 7 and the upper valve body 3 is provided with a special-shaped sealing ring 8, the lower valve body 3 and the upper valve body 7 enclose a valve cavity 90, and a C cavity is enclosed between the lower end surface of the connection part 330 and the side wall of the inner cavity of the lower valve body 7 and the upper end surface of the relay piston 19. The upper end of the upper valve body 3 is sealed with an upper cover assembly 1, a standby electromagnetic valve 17, a two-position three-way electromagnetic valve 18 and a pressure reducing electromagnetic valve 10 are arranged on a connecting part 330 of the upper valve body 3 and are in air path communication with the lower valve body 7, a relay piston 19, a valve assembly 13, an exhaust guide seat 15, an air inlet 11 and an air outlet are all arranged on the lower valve body 7, a plug 28 is further arranged on the upper valve body 3, an EPB electronic control unit 2 is arranged in the upper valve body 3, and the EPB electronic control unit 2 is integrated on the upper cover assembly 1. The EPB electronic control unit 2 is electrically connected with the pressure-reducing solenoid valve 10, the standby solenoid valve 17, and the two-position three-way solenoid valve 18.
In this embodiment, during installation, the standby electromagnetic valve 17, the two-position three-way electromagnetic valve 18 and the pressure reducing electromagnetic valve 10 are placed and installed from the opening of the upper valve body 3, the bottom of the valve cavity 90 is of an opening structure, the exhaust guide seat 15 is arranged to seal the valve cavity, and the relay piston 19 and the valve assembly 13 are installed from the lower side of the valve cavity 90.
The pneumatic control two-position three-way valve 31 comprises an air taking connector 5 and a first valve cavity 310, wherein the first valve cavity 310 is arranged on the side wall of the connecting part 330. The first valve chamber 310 includes a spool chamber 312 provided with a first spool 311 and a first piston chamber 313 near one end of the gas intake joint 5, the first piston 6 is provided in the first piston chamber 313, and the first piston 6 is slidable in the first piston chamber 313 to the left or right. The first piston 6 and the gas taking connector 5 enclose a cavity D, the valve core cavity comprises an E cavity and an F cavity, the E cavity and the F cavity are separated by a circlip 315, a ventilation sleeve 316 is supported between the circlip 315, when the first valve core 311 is in an initial state, the valve core 311 is sealed with the circlip 315, an annular notch is arranged on the outer side surface of the first valve core 311, after movement, the notch falls in the circlip separating the E cavity and the F cavity, and the E cavity and the F cavity are communicated through a shaft hole in the middle of the circlip. The first piston 6 drives the first valve core 311 to control the connection or disconnection of the E cavity and the F cavity, and the E cavity is communicated with the air inlet 11 through a channel formed in the upper valve body 3; the two-position three-way electromagnetic valve 18 comprises an L cavity, an O cavity and a J cavity, the two-position three-way electromagnetic valve 18 is in an electrified state, the L cavity is communicated with the O cavity, the two-position three-way electromagnetic valve 18 is in a power-off state, and the O cavity is communicated with the J cavity; the J cavity is communicated with the D cavity, the O cavity is communicated with the C cavity through a channel formed in the upper valve body 3, and the E cavity is communicated with the L cavity through a channel formed in the upper valve body; the standby electromagnetic valve 17 comprises a P cavity and a Q cavity, wherein the F cavity is communicated with the P cavity through a channel formed in the upper valve body 3, the Q cavity is communicated with the C cavity through a channel formed in the upper valve body 3, and the spool of the standby electromagnetic valve 17 controls the communication between the P cavity and the Q cavity.
The pressure reducing electromagnetic valve 10 comprises a G cavity, the G cavity is communicated with a C cavity, the G cavity is communicated with the C cavity through a channel formed in the upper valve body 3, and a valve core of the pressure reducing electromagnetic valve 10 controls the G cavity to be communicated with a channel N.
A back pressure exhaust passage K is provided in the spool chamber 312, and the back pressure exhaust passage K communicates with the passage N. In this embodiment, the back pressure exhaust passage K is coaxial with the spool chamber 312. The cross section of the first piston chamber 313 is larger than the cross section of the spool chamber 312, so that the transition between the first piston chamber 313 and the spool chamber 312 forms a step to limit the travel of the first piston 31. The first piston 6 comprises a piston body 61 and an inserting rod 62 inserted in the first valve core 311, an auxiliary air outlet channel 621 is formed in the inserting rod 62, a channel Y is arranged in the middle of the first valve core 311, an air leakage port 613 is formed in one end, close to the piston body 61, of the inner side wall of the valve core cavity 312, the air leakage port 613 is communicated with the space in the upper valve body 3, and when leaked compressed air exists in the upper valve body 3, the compressed air in the upper valve body 3 is sequentially discharged from the exhaust port 29 through the air leakage port, and then passes through the valve core cavity 312, the auxiliary air outlet channel 612, the channel Y, the channel K and the channel N. Wherein the channel Y, the channel K, the spool chamber 312 and the first piston chamber 313 are coaxially arranged.
It is obvious that one end of the first valve core 311 is matched with the first piston 6, the other end is provided with a first spring 314, the first spring 314 is abutted against the right end face of the valve core cavity 312 in the figure on the end face of the valve core cavity 312 far away from the first piston 6, the K channel is also arranged on the right end face of the valve core cavity 312 and is communicated with the channel N, and the E cavity and the F cavity are disconnected when the first spring 314 is in an initial state.
The device also comprises a control port 4, wherein the control port 4 is communicated with the C cavity through an air passage; valve rod 12 is arranged in valve cavity 90, relay piston 19 is sleeved on valve rod 12, guide sleeve 121 is also arranged between relay piston 19 and valve rod 12, and guide sleeve 121 extends to exhaust port 29. The N channel runs through the middle part of the valve rod 12, and the valve rod 12 provides a guiding function for the relay piston 19 and also comprises a return spring 14, one end of the return spring 14 is in contact with the exhaust guide seat 15, and the other end of the return spring is in contact with the valve assembly 13 to disconnect the communication between the cavity A and the cavity B. When the cavity C is in an air inlet state, the relay piston 19 moves downwards to abut against the valve assembly 13 and overcome the spring force of the return spring 14, so that the valve switch 13 is opened, and the cavity A and the cavity B are communicated.
The air taking connector 5 is internally provided with a manual stop valve 50 for forcedly releasing the parking brake, the manual stop valve 50 is communicated with the D cavity, the stop valve 50 comprises a second spring 510 and a second valve core 511, and the second spring 510 pushes the second valve core 511 to enable the stop valve to be in a stop state. The first valve core 511 comprises a push rod 512 at the push end, a forced air leakage opening 513 is formed in the push rod 512, the push rod 512 is pushed, and compressed air in the cavity D is discharged from the forced air leakage opening 513.
The air inlet 11 is communicated with the channel of the cavity A and is internally provided with a one-way valve 9, and the exhaust guide seat 15 is provided with a filter element and muffler assembly 16. The one-way valve 9 cuts off the communication between the A cavity and the E cavity.
In this embodiment, the air outlet includes a first air outlet, a second air outlet, a third air outlet, a fourth air outlet, and an air inlet 11, where the first air outlet and the control port 4 are disposed on the left side of the lower valve body 7; the right side of the lower valve body 7 is provided with a second air outlet; the front side of the lower valve body 7 is provided with a third air outlet and a fourth air outlet; the rear side of the lower valve body 7 is provided with a reserved opening. The control port 4 is connected with an air brake valve. Each air outlet is communicated with the cavity B.
The following description is made of several typical working states of the valve body assembly, and it should be understood that the valve body assembly is not limited to the several working states, and any valve body assembly can be implemented as a functional feature of the valve body assembly.
Driving state:
the pressure reducing electromagnetic valve 10 is not electrified, the standby electromagnetic valve 17 is electrified, the two-position three-way electromagnetic valve 18 is powered off after being electrified for 1s, and compressed air enters from the 1 port and is divided into two paths: one path of the valve is jacked up to open the one-way valve 9 to enter the cavity A; one path passes through the channel to the E cavity and then enters the L cavity through the channel, and when the two-position three-way electromagnetic valve 18 is in a power-on state, the movable iron core assembly three XV in the two-position three-way electromagnetic valve 18 moves to the static iron core assembly three XV by overcoming the action of compression spring force through electromagnetic force; compressed air enters the cavity O from the channel L, the cavity C is inflated through the channel, the electromagnetic force is removed after the two-position three-way valve 18 is electrified for 1s, the movable valve core XV returns to the initial position, the communication of the cavity L and the cavity O is disconnected, the cavity O is communicated with the cavity J at the moment, compressed air in the cavity C flows back to the cavity O, then enters the cavity D through the cavity J, the first piston 6 is pushed to move rightwards, meanwhile, the first valve core 31 is driven to move rightwards, when the first piston 6 moves rightwards to the transition step of the piston cavity 312 and the valve core cavity 312, pushing is stopped, at the moment, the cavity E is communicated with the cavity F, air entering the cavity E through the air inlet 11 directly enters the cavity F, then enters the cavity P through the cavity F, at the moment, the standby electromagnetic valve 17 is powered off, the valve port is opened through the return of the action of the spring XII, and the compressed air reaches the cavity C from the cavity P to the cavity Q. The relay piston 19 moves downwards under the action of compressed air, overcomes the pre-jacking force of the return spring 14, jacks up the valve assembly 13, compressed air in the cavity A enters the cavity B through the jacked-up valve assembly 13, and then the compressed air in the cavity B enters the parking cavity of the corresponding spring brake cylinder through each air outlet, so that the parking brake is released, and the vehicle enters a driving state.
Parking state:
the aim is to vent the compressed air in each spring brake cylinder through the vent of the integrated EPB valve assembly.
At this time, the air inlet 11 is cut off, the standby electromagnetic valve 17 is electrified to cut off the compressed air flowing to the C cavity, the two-position three-way electromagnetic valve 18 is powered off, the first valve core 31 moves leftwards under the action of the first spring 314, the compressed air in the D cavity enters the O cavity through the J cavity and then enters the C cavity through the O cavity, the pressure reducing electromagnetic valve 10 is electrified at this time, the G cavity is communicated with the channel N, the compressed air in the C cavity enters the N channel through the G cavity, and finally the compressed air is discharged through the air outlet 29.
Driving state in anti-superposition mode: the state is in an electric control mode failure state or in a parking state, and the parking mode is forcibly released. The standby electromagnetic valve 17, the pressure reducing electromagnetic valve 10 and the two-position three-way electromagnetic valve 18 are not electrified, and compressed air enters the valve cavity A from the 11 ports; when the brake pedal is depressed, the control port 4 is pressurized with air through the passage to the C chamber. The relay piston 19 moves downward under the influence of the compressed air against the compression spring 14 pushing the valve assembly 13. At this time, the compressed air in the cavity A enters the cavity B through the valve assembly which is opened. And the air outlets enter the parking cavities of the corresponding spring brake cylinders, the parking brake is released, and the vehicle enters a driving state.
Example 2
As shown in fig. 9, this embodiment provides an EPB electronic parking brake system, which includes the integrated EPB valve assembly in embodiment 1, and further includes an air reservoir 80, a spring brake cylinder parking chamber 81, and a trailer module 82, wherein the air inlet 11 is connected to the air reservoir 80, the first air outlet 21, the second air outlet 22 are both connected to the spring brake cylinder parking chamber 81, the fourth air outlet 26 is connected to the air inlet of the trailer module 82, the control port 4 is connected to the air brake valve, and the third air outlet 25 is connected to the control port of the trailer module 82.
In summary, the foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the invention.
Claims (7)
1. Integrated EPB valve assembly, including the valve body, its characterized in that: a pressure-equipped electromagnetic valve (17), a pressure-reducing electromagnetic valve (10), a two-position three-way electromagnetic valve (18), a pneumatic control two-position three-way valve (31), a relay piston (19) and a lower valve body (7) are arranged in the valve body, a valve assembly (13) and an exhaust guide seat (15) arranged at the bottom are arranged on the lower valve body (7), and an exhaust port (29) is arranged on the exhaust guide seat (15); the valve body is also provided with an air inlet (11) and an air outlet, a valve cavity is arranged in the valve body, the valve cavity comprises a cavity A, a cavity B and a cavity C which is formed by enclosing the upper end surface of the relay piston (19) with the inner wall of the valve cavity, the cavity A and the cavity B are disconnected or communicated through a valve assembly (13), a pneumatic control two-position three-way valve (31) is connected with the air inlet (11), a standby pressure electromagnetic valve (17) and a two-position three-way electromagnetic valve (18), and the gas path of the pneumatic control two-position three-way valve (31) of the standby pressure electromagnetic valve (17) is communicated or disconnected; the electromagnetic two-position three-way electromagnetic valve (18) controls the communication between the C cavity and the pneumatic control two-position three-way valve (31), the relay piston (19) moves downwards and is used for opening the valve assembly (13) to control the communication between the A cavity and the B cavity, and the B cavity is communicated with the air outlet; an exhaust channel N is formed in the valve body and is communicated with an exhaust port (29), and a pressure reducing electromagnetic valve (10) controls the communication of the C cavity and the gas path of the exhaust channel N; the valve body comprises an upper valve body (3) and a lower valve body (7), an upper cover assembly (1) is arranged at the upper end of the upper valve body (3), a standby electromagnetic valve (17), a two-position three-way electromagnetic valve (18) and a pressure reducing electromagnetic valve (10) are arranged in the upper valve body (3) and are in air path communication with the lower valve body (7), a relay piston (19), a valve assembly (13), an exhaust guide seat (15), an air inlet (11) and an air outlet are all arranged on the lower valve body (7), a plug (28) is further arranged on the upper valve body (3), an EPB electronic control unit (2) is arranged in the upper valve body (3), and the EPB electronic control unit (2) is electrically connected with the pressure reducing electromagnetic valve (10), the standby electromagnetic valve (17) and the two-position three-way electromagnetic valve (18); the pneumatic control two-position three-way valve (31) comprises an air taking connector (5) and a first valve cavity (310), the first valve cavity (310) comprises a valve core cavity (312) provided with a first valve core (311) and a first piston cavity (313) close to one end of the air taking connector (5), the cross section of the first piston cavity (313) is larger than that of the valve core cavity (312), the first piston (6) is arranged in the first piston cavity (313), the first piston (6) and the air taking connector (5) enclose a cavity D, the valve core cavity comprises an E cavity and an F cavity, the first piston (6) drives the first valve core to control the E cavity and the F cavity to be connected or disconnected, and the E cavity is communicated with the air inlet (11); the two-position three-way electromagnetic valve (18) comprises an L cavity, an O cavity and a J cavity, the two-position three-way electromagnetic valve (18) is in an electrified state, the L cavity is communicated with the O cavity, the two-position three-way electromagnetic valve (18) is in a power-off state, and the O cavity is communicated with the J cavity; the J cavity is communicated with the D cavity, the O cavity is communicated with the C cavity, and the E cavity is communicated with the L cavity; the standby electromagnetic valve (17) comprises a P cavity and a Q cavity, the F cavity is communicated with the P cavity, the Q cavity is communicated with the C cavity, and a valve core of the standby electromagnetic valve (17) controls the communication between the P cavity and the Q cavity; the pressure reducing electromagnetic valve (10) comprises a G cavity, the G cavity is communicated with a C cavity, and a valve core of the pressure reducing electromagnetic valve 10 controls the G cavity to be communicated with a channel N; the device also comprises a control port (4), wherein the control port (4) is communicated with the C cavity through an air passage; a valve rod (12) is arranged in the valve cavity, a relay piston (19) is sleeved on the valve rod (12), and an N channel penetrates through the middle part of the valve rod (12).
2. The integrated EPB valve assembly according to claim 1, wherein: a back pressure exhaust channel K is arranged in the valve core cavity (312), and the back pressure exhaust channel K is communicated with the channel N.
3. The integrated EPB valve assembly according to claim 2, wherein: the cross section of first piston chamber (313) is greater than the cross section of spool chamber (312), first piston (6) are including piston body (61) and insert pole (62) of grafting in first case (311), auxiliary air outlet channel (621) have been seted up on insert pole (62), first case (311) middle part is provided with passageway Y, the one end that is close to piston body (61) in spool chamber (312) inside wall is provided with and lets out air port (613), the space intercommunication in air port (613) and last valve body (3), let out air port (613), spool chamber (312), auxiliary air outlet channel (612), passageway Y, passageway K, passageway N communicate in proper order and form the air release passageway.
4. The integrated EPB valve assembly according to claim 1, wherein: one end of the first valve core (311) is matched with the first piston (6), a first spring (314) is arranged at the other end of the first valve core, and the first spring (314) is abutted against the end face, far away from the first piston (6), of the valve core cavity (312).
5. The integrated EPB valve assembly according to claim 1, wherein: a manual stop valve (50) for forcedly releasing the parking brake is arranged in the air taking connector (5), and the manual stop valve (50) is communicated with the D cavity.
6. The integrated EPB valve assembly according to claim 1, wherein: a one-way valve (9) is arranged in a channel of the air inlet (11) communicated with the cavity A, and a filter element and muffler assembly (16) is arranged on the exhaust guide seat (15).
7. An EPB electronic parking brake system, characterized in that: the integrated EPB valve assembly of any of claims 1 to 6, the air outlet comprises a first air outlet (21), a second air outlet (22), a third air outlet (25) and a fourth air outlet (26), the electronic parking brake system further comprises an air reservoir (80), a spring brake cylinder parking cavity (81) and a trailer module (82), the air inlet (11) is connected with the air reservoir (80), the first air outlet (21) and the second air outlet (22) are both connected with the spring brake cylinder parking cavity (81), the fourth air outlet (26) is connected with the air inlet of the trailer module (82), the control port (4) is connected with the air brake valve (4), and the third air outlet (25) is connected with the control port of the trailer module (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158783.0A CN109501791B (en) | 2018-09-30 | 2018-09-30 | Integrated EPB valve assembly and EPB electronic parking brake system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811158783.0A CN109501791B (en) | 2018-09-30 | 2018-09-30 | Integrated EPB valve assembly and EPB electronic parking brake system |
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| CN109501791A CN109501791A (en) | 2019-03-22 |
| CN109501791B true CN109501791B (en) | 2024-01-19 |
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| CN201811158783.0A Active CN109501791B (en) | 2018-09-30 | 2018-09-30 | Integrated EPB valve assembly and EPB electronic parking brake system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111572520A (en) * | 2020-06-11 | 2020-08-25 | 西安正昌电子股份有限公司 | Single-channel air pressure adjusting device of electric control braking system |
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| CN109501791A (en) | 2019-03-22 |
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