CN206841417U - Relay valve and the electronic brake system based on relay valve - Google Patents
Relay valve and the electronic brake system based on relay valve Download PDFInfo
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- CN206841417U CN206841417U CN201720194030.XU CN201720194030U CN206841417U CN 206841417 U CN206841417 U CN 206841417U CN 201720194030 U CN201720194030 U CN 201720194030U CN 206841417 U CN206841417 U CN 206841417U
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- return spring
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Abstract
The utility model discloses a kind of relay valve and the electronic brake system based on relay valve.Relay valve includes housing, control piston, valve, valve return spring and plate valve, housing upper is provided with control mouth, bottom is provided with exhaust outlet, side is provided with air inlet, opposite side is provided with gas outlet, housing is divided into control action of gas source air cavity and braking operation air cavity, control action of gas source air cavity communicates with control mouth, valve upper end controls the break-make between gas outlet and exhaust outlet, lower end controls the break-make between air inlet and gas outlet, control below piston tight against a piston return spring, the bottom of valve is tight against valve return spring, when controlling piston to be in the top, gas outlet communicates with exhaust outlet, when piston return spring compression is descending, gas outlet communicates with air inlet.Relay valve of the present utility model is simple in construction, reliable operation, cost are cheap, and electronic brake system is safe and reliable.
Description
Technical field
The utility model belongs to brake system of car parts technical field, particularly a kind of simple in construction, reliable operation,
The cheap relay valve of cost and the electronic brake system based on relay valve.
Background technology
At present, the vapour-pressure type holding brake device of medium-heavy automobile, it is use " break brake " principle more, by making parking system
Take offence room exhaust, produce parking braking.For realize parking braking and release parking braking, frequently with magnetic valve, relay valve or its
Combination etc. operates to complete intake and exhaust.In the brakes of truck, relay valve is used for shortening the reaction time and releasing making
The dynamic time, play a part of to accelerate and put soon.
Chinese invention patent application " 140 relay valve " (application number：201410485169.0 publication date：2014.12.10)
A kind of relay valve is disclosed, it includes bolted upper valve body and lower valve body.Above-mentioned relay valve due to setting to structure again
Haggle over more, cause structure relative complex, cost of manufacture is high, while its air-tightness to system requires higher, if occurring in gas circuit
Gas leakage, easily influences the normal work of relay valve, and reliability has much room for improvement.
The content of the invention
The purpose of this utility model is to provide a kind of relay valve, and simple in construction, reliable operation, cost are cheap.
Another object of the present utility model is to provide a kind of electronic brake system based on relay valve, operation letter
It is single, safe and reliable.
The technical solution for realizing the utility model purpose is：
A kind of relay valve, including housing 41, and be arranged on from top to bottom in housing 41 control piston 42, valve 44,
Valve return spring 45 and plate valve 46, the top of housing 41 are provided with control mouth A, and bottom is provided with exhaust outlet D, and side is provided with air inlet
Mouth C, opposite side are provided with gas outlet B；
The outside of control piston 42 is formed by sealing ring 47 and the inwall of housing 41 to be sealed, and housing 41 is divided into and is located at
The control action of gas source air cavity 48 and the braking operation air cavity 49 positioned at bottom on top, the control action of gas source air cavity 48 and control
Donsole A is communicated；
The break-make between the upper end of valve 44 control gas outlet B and exhaust outlet D under the piston 42 positioned at control, lower end control
Break-make between air inlet C and gas outlet B processed；
The control piston 42 is below tight against a piston return spring 43, and the bottom of the valve 44 is tight against valve return bullet
Spring 45, the plate valve 46 make exhaust outlet D be in normally off when not acted on by air pressure inside, when control piston 42 is in most upper
During end, the normal extension of piston return spring 43, gas outlet B communicates with exhaust outlet D, when piston return spring 43 is pressurized descending,
Piston return spring 43, which is pressurized, to be shunk, and gas outlet B communicates with air inlet C.
The technical solution for realizing the utility model another object is：
A kind of electronic brake system based on relay valve, including air accumulator 1, parking braking controller 10, air pressure transmission
Sensor 6 and parking braking air chamber 7, it is characterised in that：
Also include relay valve 4, the air inlet C of the relay valve 4 is connected with air accumulator 1, its gas outlet B and parking braking gas
Room 7 is connected, and the input of the baroceptor 6 is serially connected in the gas circuit between relay valve 4 and parking braking air chamber 7, and it is believed
Number output end is connected with parking braking controller 10；
Be additionally provided with the first magnetic valve 2 between the control mouth A and air accumulator 1 of relay valve 4, relay valve 4 control mouth A with
The 3rd magnetic valve 5, in addition to second solenoid valve 3, the input and servo of the second solenoid valve 3 are additionally provided between the B of gas outlet
The control mouth A of valve 4 is connected；
First magnetic valve 2, second solenoid valve 3, the 3rd magnetic valve 5 electrically connect with parking braking controller 10 respectively.
Compared with prior art, its remarkable advantage is the utility model：
1st, reliable operation：The utility model installs piston return spring additional, can solve when relay valve control mouth has relatively low gas
Pressure, or in the case that when parked state is kept, control mouth leaks into a small amount of gas, the company between guarantee gas outlet and exhaust outlet
It is logical, improve servo valve opening pressure and ensure the unobstructed of outlet simultaneously.Also can overcome because the pistons caused by reason such as vibrations are downward
It is mobile, close servo vent passageway.
2nd, it is conveniently adjusted：The utility model has height atmospheric pressure state auto-lock function concurrently, to make system reach optimal
Effect, the area of upper lower piston ratio is improved by designing piston and valve size, it is not necessary to which structure is entered again in itself
Row somewhat complex design.
3rd, cost is cheap：The utility model installs piston reset spring additional on the basis of traditional relay valve, implements convenient, performance
Excellent, required cost is relatively low.
4th, security is good：Electronic brake system sets up relay valve and the 3rd magnetic valve, even if system occurs gas leakage and showed
As, using relay valve and the 3rd solenoid valve block into auto-lock function carry out gas leakage supplement automatically or release the gas leak into,
Ensure air pressure value stabilization hyperbar and low pressure gas two states in parking braking air chamber, which increase the reliability of system and safety
Property.
5th, control is simple：Either release parking and still apply parking, the utility model can automatic adjustable pressure to tie up
Reset condition is held, reduces the complexity of system control.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the structural representation for the relay valve that the utility model is used for electronic brake system.
Fig. 2 is the fundamental diagram using the air-pressure type electronic parking braking system of the relay valve shown in Fig. 1.
Fundamental diagram when Fig. 3 is Fig. 1 relay valve air-suction state.
Fundamental diagram when Fig. 4 is Fig. 1 relay valve exhaust condition.
Fundamental diagram when Fig. 5 is Fig. 1 relay valve poised state.
Fig. 6 is the profile of equilibrium figure of Fig. 1 relay valve.
In figure,
1 air accumulator, 2 first magnetic valves, 3 second solenoid valves, 4 relay valves, 5 the 3rd magnetic valves, 6 baroceptors, 7 parkings
Brake chamber, 8 manual mode switch, 9 automatic modes switch, 10 parking braking controllers, 11 parking indicator lamps,
41 housings, 42 control pistons, 43 piston return springs, 44 valves, 45 valve return springs, 46 plate valves, 47 sealings
Circle, 48 control action of gas source air cavitys, 49 braking operation air cavitys, A control mouths, B gas outlets, C air inlets, D exhaust outlets.
Embodiment
As shown in figure 1, the utility model relay valve, including housing 41, and the control being arranged on from top to bottom in housing 41
Piston 42, valve 44, valve return spring 45 and plate valve 46 processed, the top of housing 41 are provided with control mouth A, and bottom is provided with exhaust
Mouth D, side are provided with air inlet C, and opposite side is provided with gas outlet B,
The outside of control piston 42 is formed by sealing ring 47 and the inwall of housing 41 to be sealed, and housing 41 is divided into and is located at
The control action of gas source air cavity 48 and the braking operation air cavity 49 positioned at bottom on top, the control action of gas source air cavity 48 and control
Donsole A is communicated,
The break-make between the upper end of valve 44 control gas outlet B and exhaust outlet D under the piston 42 positioned at control, lower end control
Break-make between air inlet C and gas outlet B processed,
The control piston 42 is below tight against a piston return spring 43, and the bottom of the valve 44 is tight against valve return bullet
Spring 45, the plate valve 46 make exhaust outlet D be in normally off when not acted on by air pressure inside, when control piston 42 is in topmost
When, the normal extension of piston return spring 43, gas outlet B communicates with exhaust outlet D, living when piston return spring 43 is pressurized descending
Fill in return spring 43 and be pressurized and shrink, gas outlet B communicates with air inlet C.
The rigidity and pretightning force of the piston return spring 43, upper and lower piston area ratio are determined by following formula：
Wherein,
FSS+FKK=PSK·SA
In formula, PAFor control pressure, PBTo export air pressure, SATo control piston upper surface bearing area, SDFor the logical of valve
Hole area, FSSFor piston return spring pretightning force；FKKFor valve return initial tension of spring, PSKFor spring equivalence air pressure.
The rigidity and pretightning force of piston return spring 43, upper and lower piston area ratio will ensure when piston two-way pressure is in flat
Weighing apparatus state and intracavitary air pressure is in more than 4.5bar, gas outlet B air pressure are higher than control mouth A air pressure, and such system could be compared with
Ideally realize high pressure auto-lock function.
As shown in Fig. 2 electronic brake system of the utility model based on relay valve, including air accumulator 1, parking braking
Controller 10, baroceptor 6 and parking braking air chamber 7, in addition to foregoing relay valve 4, the air inlet of the relay valve 4
Mouthful C is connected with air accumulator 1, and its gas outlet B is connected with parking braking air chamber 7, the input of the baroceptor 6 be serially connected in after
In dynamic gas circuit between valve 4 and parking braking air chamber 7, its signal output part is connected with parking braking controller 10；
Be additionally provided with the first magnetic valve 2 between the control mouth A and air accumulator 1 of relay valve 4, relay valve 4 control mouth A with
The 3rd magnetic valve 5, in addition to second solenoid valve 3, the input and servo of the second solenoid valve 3 are additionally provided between the B of gas outlet
The control mouth A of valve 4 is connected；
First magnetic valve 2, second solenoid valve 3, the 3rd magnetic valve 5 electrically connect with parking braking controller 10 respectively.
Operation principle of the present utility model is described in detail with reference to Fig. 3 to Fig. 6.
First, air-suction state
As shown in figure 3, when Solutions of Systems removes parking braking：The energization of first magnetic valve 2, which is opened, the 3rd magnetic valve 5 is powered closes,
Gases at high pressure enter relay valve control mouth A from air accumulator 1 through the first magnetic valve 2, and control piston 42 gradually moves down.In control mouth A
Only lower pressure when, control piston 42 is not enough to overcome the effect of return spring to opening inlet channel, servo during this
The cisco unity malfunction of valve 4.Compared with traditional relay valve, relay valve described in the utility model improves Opening pressure so that should
The relay valve of type is easier to ensure that the connection between gas outlet B and exhaust outlet D.
When control mouth A pressure gradually increases, control piston 42 is displaced downwardly to be contacted with valve 44, continues to move down, piston
42 and valve 44 overcome the pretightning force of return spring 43 and 45 jointly, first close exhaust passage, then open inlet channel, gas storage
Compressed air in tank 1 is just directly entered in servo valve chamber by air inlet C, and brake chamber 7 is filled with through gas outlet B, i.e., after
Dynamic valve 4 is in air-suction state.
2nd, exhaust condition
As shown in figure 4, it is that relay valve 4 is in exhaust condition that system, which applies parking braking,：The energization of second solenoid valve 3 unlatching,
3rd magnetic valve 5, which is powered, closes, and control mouth A gas is discharged into air through second solenoid valve 3, controls piston 42 and valve assembly to exist
Move up in the presence of return spring 43,45 to extreme position, valve 44 and separated with piston 42, inlet channel is closed, exhaust outlet D
Open, exhaust passage is opened, and the compressed air in brake chamber 7 is discharged into air through plate valve 46.
In the process, the pressure of the gas to be discharged of brake chamber 7 gradually reduces, what the utility model relay valve installed additional
Piston return spring 43 can internally low pressure when, overcome that to be displaced downwardly to closing exhaust logical due to pistons 42 caused by factor such as vibrations
Road, ensure exhaust smoothly, thoroughly.
3rd, poised state
When system keeps parking or non-parked state, the inside of relay valve 4 is in poised state.Process is kept with brake release
Exemplified by：When the control pressure from air accumulator 1 no longer changes, that is, act on trying hard to keep on control piston 42 keep steady it is surely constant, and
Because inlet channel is opened, the chamber room pressure of relay valve 4 is continuously increased and acted on the pressure-bearing surface of piston 42 and valve 44, with
Return spring 43,45 overcomes control pressure to act on jointly, makes to move to closing air inlet, now, air inlet on piston 42 and valve 44
Mouth is closed simultaneously with exhaust outlet, and the intracavitary air pressure of relay valve 4 remains unchanged, the pressure in high-pressure balancing state, brake piping
Keep constant.
4th, calculate
The relay valve 4 that the utility model is applied to electronic brake system is combined with the 3rd magnetic valve 5, by servo
The gas outlet B of valve 4 connects with control mouth A, and system is achieved height atmospheric pressure state auto-lock function.
High pressure auto-lock process：3rd magnetic valve 5 connects the gas outlet B of relay valve 4 with control mouth A, when pipe joint etc.
During generation gas leakage, due to relay valve 4 structures shape of itself, B implications pressures is higher than A implication pressures, so the gas of B mouths can be to A mouths
Flowing, now relay valve 4 is in air-suction state, and gas supplement is carried out to it, keeps parking system to be in high pressure conditions, realizes high
Pressure condition memory function.
Low pressure auto-lock process：If gases at high pressure are leaked at the control mouth A of relay valve 4 by the first magnetic valve 2, leak into
Gases at high pressure the gas outlet B of relay valve 4 via the 3rd magnetic valve 5, can be flowed into, then be discharged into greatly via the exhaust outlet D of relay valve 4
In gas, the accumulation of the gases at high pressure that leak into the control mouth A of relay valve 4 will not be caused, relay valve will not be more opened, so as to realize
Low pressure auto-lock function.
When system keeps parking or non-parked state, the intracavitary air pressure of relay valve 4 keeps stable, in dynamic equilibrium shape
State, according to rough calculation, its equilibrium equation is substantially：
PA·SA=PB·SB+FSS+FKK(formula 1)
In formula, PAFor control pressure；PBTo export air pressure；SATo control piston upper surface pressure-bearing surface；SBFor under control piston
Surface pressure-bearing surface；FSSFor piston return spring pretightning force；FKKFor valve return initial tension of spring.
Due to two return springs 43,45 pressure by piston 42 upper surface pressure-bearing surface SAUndertake, can be incited somebody to action by conversion
Pretightning force FSSAnd FKKExpressed by following formula：
FSS+FKK=PSK·SA(formula 2)
It is easy to get simultaneously by servo valve arrangement：
SB=SA-SD(formula 3)
Wherein SDFor the via area of valve 43, then formula (1) can obtain final equilibrium equation by processing and be：
By PBWith PARelation represented with line chart, as shown in fig. 6, two intersections of complex curve H (PH,PH) coordinate be computed can
：
Intersection point H tools are of great significance：When the profile of equilibrium is below the intersection point, system can realize low pressure self-locking
Function；Only when the profile of equilibrium crosses the intersection point, system could realize high pressure auto-lock function.Therefore, should be according to real system
The demand of function carries out appropriate adjustment to the point, and H points obviously with piston area ratio above and below relay valveRelevant (PSKIn bullet
Can be considered constant value in the case that spring is selected), thus relay valve described in the utility model can by design piston and valve size from
And the area ratio of upper lower piston is improved, so that system height atmospheric pressure state auto-lock function reaches optimal effect.
Claims (3)
1. a kind of relay valve, including housing (41), and control piston (42), the valve being arranged on from top to bottom in housing (41)
(44), valve return spring (45) and plate valve (46), housing (41) top are provided with control mouth (A), and bottom is provided with exhaust outlet
(D), side is provided with air inlet (C), and opposite side is provided with gas outlet (B)；
Formed and sealed by sealing ring (47) and housing (41) inwall on the outside of the control piston (42), housing (41) is divided into
Superposed control action of gas source air cavity (48) and the braking operation air cavity (49) positioned at bottom, the control action of gas source gas
Chamber (48) communicates with control mouth (A)；
Break-make between valve (44) upper end control gas outlet (B) and exhaust outlet (D) under control piston (42), under
Break-make between end control air inlet (C) and gas outlet (B)；
The control piston (42) is below tight against a piston return spring (43), and the bottom of the valve (44) is tight against valve return
Spring (45), the plate valve (46) make exhaust outlet (D) be in normally off when not acted on by air pressure inside, when control piston (42)
During in the top, piston return spring (43) normal extension, gas outlet (B) is communicated with exhaust outlet (D), is worked as piston return spring
(43) when being pressurized descending, piston return spring (43), which is pressurized, to be shunk, and gas outlet (B) communicates with air inlet (C).
2. relay valve according to claim 1, it is characterised in that：The rigidity and pretension of the piston return spring (43)
Power, upper and lower piston area ratio are determined by following formula：
Wherein,
FSS+FKK=PSK·SA
In formula, PAFor control pressure, PBTo export air pressure, SATo control piston upper surface bearing area, SDFor the through-hole face of valve
Product, FSSFor piston return spring pretightning force, FKKFor valve return initial tension of spring, PSKFor spring equivalence air pressure.
3. a kind of electronic brake system based on relay valve, including air accumulator (1), parking braking controller (10), air pressure
Sensor (6) and parking braking air chamber (7), it is characterised in that：
Also include relay valve as claimed in claim 1 (4), air inlet (C) and air accumulator (1) phase of the relay valve (4)
Even, its gas outlet (B) is connected with parking braking air chamber (7), and the input of the baroceptor (6) is serially connected in relay valve (4)
In gas circuit between parking braking air chamber (7), its signal output part is connected with parking braking controller (10)；
The first magnetic valve (2), the control in relay valve (4) are additionally provided between the control mouth (A) of relay valve (4) and air accumulator (1)
The 3rd magnetic valve (5), in addition to second solenoid valve (3), the second solenoid valve are additionally provided between donsole (A) and gas outlet (B)
(3) input is connected with the control mouth (A) of relay valve (4)；
First magnetic valve (2), second solenoid valve (3), the 3rd magnetic valve (5) are electrically connected with parking braking controller (10) respectively
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720194030.XU CN206841417U (en) | 2017-03-02 | 2017-03-02 | Relay valve and the electronic brake system based on relay valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720194030.XU CN206841417U (en) | 2017-03-02 | 2017-03-02 | Relay valve and the electronic brake system based on relay valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206841417U true CN206841417U (en) | 2018-01-05 |
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ID=60789578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720194030.XU Active CN206841417U (en) | 2017-03-02 | 2017-03-02 | Relay valve and the electronic brake system based on relay valve |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882174A (en) * | 2017-03-02 | 2017-06-23 | 南京理工大学 | Relay valve and the electronic brake system based on relay valve |
| CN113365891A (en) * | 2019-02-13 | 2021-09-07 | 采埃孚商用车系统欧洲有限公司 | Compressed air brake system for motor vehicles |
| CN113650597A (en) * | 2021-09-25 | 2021-11-16 | 威海广泰空港设备股份有限公司 | Relay valve and anti-freezing control method thereof |
| CN114987419A (en) * | 2022-07-13 | 2022-09-02 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
-
2017
- 2017-03-02 CN CN201720194030.XU patent/CN206841417U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882174A (en) * | 2017-03-02 | 2017-06-23 | 南京理工大学 | Relay valve and the electronic brake system based on relay valve |
| CN113365891A (en) * | 2019-02-13 | 2021-09-07 | 采埃孚商用车系统欧洲有限公司 | Compressed air brake system for motor vehicles |
| CN113650597A (en) * | 2021-09-25 | 2021-11-16 | 威海广泰空港设备股份有限公司 | Relay valve and anti-freezing control method thereof |
| CN114987419A (en) * | 2022-07-13 | 2022-09-02 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
| CN114987419B (en) * | 2022-07-13 | 2023-03-14 | 北京福田戴姆勒汽车有限公司 | Solenoid valve, parking braking system and vehicle |
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