CN110466305B - ECAS distributing valve assembly - Google Patents
ECAS distributing valve assembly Download PDFInfo
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- CN110466305B CN110466305B CN201910747361.5A CN201910747361A CN110466305B CN 110466305 B CN110466305 B CN 110466305B CN 201910747361 A CN201910747361 A CN 201910747361A CN 110466305 B CN110466305 B CN 110466305B
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- air chamber
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- distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0525—Height adjusting or levelling valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0526—Distributor units, e.g. for retractable wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
- B60G2202/314—The spring being a pneumatic spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/202—Height or leveling valve for air-springs
- B60G2500/2021—Arrangement of valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
- B60G2500/302—Height or ground clearance using distributor valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to the field of automobiles, and particularly discloses an ECAS air distribution valve assembly. The ECAS gas distribution valve assembly comprises a shell, wherein at least three groups of gas distribution modules are arranged in the shell, and a gas distribution component and an opening and closing component are arranged in each gas distribution module; the air distribution assembly comprises an upper air chamber, a middle air chamber and a lower air chamber which are sequentially arranged in the shell; the gas distribution assembly also comprises a valve rod, and a gas distribution channel is arranged on the valve rod; the opening and closing assembly comprises a transition air chamber arranged in the shell, the transition air chamber is communicated with an upper air chamber or a middle air chamber or a lower air chamber of the corresponding air distribution module through an air passage I, and the opening and closing assembly further comprises an opening and closing element; transition air chambers between different air distribution modules are communicated with each other. The ECAS air distribution valve assembly realizes control of the modes of charging and discharging of the left air bag and the right air bag, charging and discharging of the lifting shaft and unbalance loading by using a single air distribution valve, and the system integration level is high.
Description
Technical Field
The invention relates to the field of automobiles, in particular to an ECAS gas distribution valve assembly.
Background
The ECAS is an air suspension system electronically controlled by a passenger car/truck, mainly comprises an electronic control unit, a distributing valve, a height sensor, an air bag and other components, and has the functions of supporting a car body and improving riding.
The air bag is an execution unit for controlling a suspension system, and the height of the vehicle body is adjusted through inflation and deflation of the air bag, and the air bag generally comprises a rear axle left air bag, a rear axle right air bag, a lifting axle left air bag, a lifting axle middle air bag and a lifting axle right air bag. The air distribution valve is controlled by the electric control unit to perform inflation and deflation adjustment on each air bag.
Air suspension systems typically include the following three modes of operation:
the left and right air bags are inflated and deflated, the middle air bag of the lifting shaft is deflated at the moment, and then the left air bag of the rear shaft, the right air bag of the rear shaft, the left air bag of the lifting shaft and the middle air bag of the lifting shaft are inflated or deflated, so that the height of the vehicle body is adjusted;
the lifting shaft is inflated and deflated, at the moment, the rear shaft left air bag, the rear shaft right air bag, the lifting shaft left air bag and the lifting shaft right air bag are deflated simultaneously, and then the lifting shaft middle air bag is inflated and deflated, so that the height of the vehicle body is adjusted;
in the unbalance loading mode, the left lifting shaft air bag, the right lifting shaft air bag and the middle lifting shaft air bag are in a pressure maintaining state (namely, the air charging and discharging operations are not performed in the process), and then the air charging and discharging adjustment is performed on the left rear shaft air bag and the right rear shaft air bag according to the height condition of a vehicle body, so that the unbalance loading state is adapted.
The conversion and control between the three working modes are completed by the distributing valve. The existing air suspension system needs at least two air distribution valves to complete the control of the three working modes, the structural integration level is not high,
disclosure of Invention
The invention aims to solve the technical problem of providing an ECAS air distribution valve assembly, which realizes the control of the modes of charging and discharging of a left air bag and a right air bag, charging and discharging of a lifting shaft and unbalance loading by a single air distribution valve and has high system integration level.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an ECAS gas distribution valve assembly comprises a shell, wherein at least three groups of gas distribution modules are arranged in the shell, and a gas distribution assembly and an opening and closing assembly are arranged in each gas distribution module;
the gas distribution assembly comprises an upper gas chamber, a middle gas chamber and a lower gas chamber which are sequentially arranged in a shell, and the upper gas chamber, the middle gas chamber and the lower gas chamber are respectively provided with a gas distribution interface; a connecting channel is arranged between the upper air chamber and the middle air chamber, and a connecting channel is arranged between the middle air chamber and the lower air chamber; the gas distribution assembly also comprises a valve rod which sequentially penetrates through the two connecting channels and is in sliding seal with the connecting channels, and a gas distribution channel is arranged on the valve rod;
the opening and closing assembly comprises a transition air chamber arranged in the shell, the transition air chamber is communicated with an upper air chamber or a middle air chamber or a lower air chamber of the corresponding air distribution module through an air passage I, and the opening and closing assembly further comprises an opening and closing element for controlling the opening and closing of the air passage I;
the transition air chambers between different air distribution modules are communicated with each other.
Each air distribution assembly is internally provided with an upper air chamber, a middle air chamber and a lower air chamber, the corresponding upper air chamber, the middle air chamber and the corresponding lower air chamber are respectively provided with an air distribution interface, and the air distribution interfaces are used for being connected with air inlet, air exhaust and each air bag. The three gas distribution assemblies are connected through the opening and closing assembly, and the opening and closing assembly is used for controlling the on-off of the three gas distribution assemblies. Through the cooperation of distribution subassembly and opening and close the subassembly, the air admission and the exhaust of each gasbag are controlled to gasbag about realizing fills the control of gassing, lift shaft fill gassing and unbalance loading mode, system integration degree is high.
Preferably, the opening and closing element comprises a normally closed valve plate corresponding to the air passage I and a driving valve core for controlling the opening and closing of the normally closed valve plate.
Preferably, the driving valve plug is arranged in the transition air chamber; the shell is also provided with an exhaust port, a transition air chamber of one air distribution module is communicated with the exhaust port through an air passage II, and the on-off of the air passage II is controlled corresponding to a driving valve core in the air distribution module.
Preferably, the driving valve core is in sliding seal with the cavity wall of the transition air chamber, the transition air chamber is divided into an upper transition air chamber and a lower transition air chamber, and the air passage I and the air passage II are respectively connected with the lower transition air chamber;
the gas distribution device is characterized by further comprising first control modules, each first control module comprises first control assemblies in one-to-one correspondence with the gas distribution module, each first control assembly comprises a first control cavity arranged in the shell, each first control cavity is provided with a first gas inlet channel, a first gas exhaust channel and a first control channel, each first gas inlet channel is connected with a control gas source, and each first control channel is communicated with the upper transition gas chamber;
and a first valve body for controlling the on-off of the first air inlet channel and the first exhaust channel is also arranged in the first control cavity.
Preferably, the air distribution channel comprises grooves distributed on the side surface of the valve rod; the length of the groove is greater than the length of the connecting channel and less than or equal to the length of the middle air chamber in the length direction of the valve rod.
Preferably, the air distribution assembly further comprises a driving unit, and the driving unit drives the valve rod to slide relative to the connecting channel.
Preferably, the driving unit comprises a driving air chamber, a piston body which moves synchronously with the valve rod is arranged in the driving air chamber, two annular sliding grooves are distributed on the side surface of the piston body along the length direction, and a transition section is formed between every two adjacent sliding grooves; piston rings are respectively arranged in the two annular sliding grooves, and the piston rings are respectively in sliding seal with the bottoms of the sliding grooves and the side walls of the driving air chamber; the piston body and the piston ring divide the driving air chamber into an upper driving cavity and a lower driving cavity; the lateral wall of drive air chamber is equipped with the barrier part that corresponds with the piston ring, the barrier part be located between two piston rings, barrier part and changeover portion contactless.
The driving module has three working modes, which are respectively: 1. when a high-pressure driving air source is independently introduced into the upper driving cavity, the piston body moves to a lower limit position under the driving of air pressure; 2. when a high-pressure driving air source is independently introduced into the lower driving cavity, the piston body moves to an upper limit position under the driving of air pressure; 3. when the downward driving cavity and the upper driving cavity are the same as a high-pressure driving air source, the piston body moves to the middle balance position, at the moment, the two piston rings move to the blocking part position, and meanwhile, the piston body is also in the middle position under the pushing of the two piston rings.
Three kinds of mode one-to-one correspondence of drive module's three kinds of mode and distribution module, the piston body realizes the switching of three kinds of mode of distribution module through driving the motion of valve lever.
The core of the driving module is that the middle balance position except the upper limit position and the lower limit position is determined ingeniously through the arrangement of the two piston rings and the blocking portion, and then the accurate positioning of the three working modes is achieved.
Preferably, a transition cavity is formed between the two piston rings and is communicated with the exhaust port. For balancing the gas pressure in the transition chamber during movement of the piston body and the piston ring.
Preferably, the air distribution assembly further comprises a second control module, and the second control module controls the air pressure of the upper driving cavity and the lower driving cavity in the three air distribution assemblies respectively.
Preferably, the second control module comprises two groups of second control assemblies, each second control assembly comprises a second control cavity arranged in the shell, the second control cavity is respectively provided with a second air inlet channel, a second air outlet channel and a second control channel, and the second air inlet channel is connected with a control air source; a second valve body for controlling the second air inlet channel and the second air outlet channel to be switched on and off is also arranged in the first control cavity; the upper driving cavity of each air distribution assembly is communicated with the control channel of one group of second control assemblies, and the lower driving cavity is communicated with the control channel of the other group of second control assemblies.
Drawings
FIG. 1 is a front view of the ECAS valve assembly of the present embodiment;
FIG. 2 is a side view of the ECAS valve assembly of the present embodiment;
FIG. 3 isbase:Sub>A view A-A of FIG. 1;
FIG. 4 is a view B-B of FIG. 1;
FIG. 5 is a view C-C of FIG. 1;
FIG. 6 is a view taken from D-D of FIG. 2;
FIG. 7 is a view E-E of FIG. 2;
FIG. 8 is a schematic structural diagram of an opening and closing assembly of the ECAS air distribution valve assembly of the present embodiment, which includes a first control assembly corresponding to the opening and closing assembly;
FIG. 9 is a schematic diagram of a second control module of the ECAS valve assembly of the present embodiment;
FIG. 10 is a schematic diagram of a driving unit of the ECAS air distribution valve assembly of the present embodiment;
fig. 11 is a partial schematic view of a valve actuating assembly of the ECAS valve assembly of the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1 to 7, an ECAS gas distribution valve assembly includes a housing, three sets of gas distribution modules 6, namely, a gas distribution module I6 a, a gas distribution module II 6b, and a gas distribution module III 6c, are disposed in the housing, the gas distribution module I6 a includes a gas distribution assembly I8 a and an opening and closing assembly I7 a, the gas distribution module II 6b includes a gas distribution assembly II 8b and an opening and closing assembly II 7b, and the gas distribution module III 6c includes a gas distribution assembly III 8c and an opening and closing assembly III 7c.
As shown in fig. 1 and 11, each of the air distribution assemblies 8 includes an upper air chamber 87, a middle air chamber 86, and a lower air chamber 85, which are sequentially arranged in a housing, the upper air chamber 87, the middle air chamber 86, and the lower air chamber 85 are respectively provided with air distribution ports 2, and the distribution of the air distribution ports is as shown in 2a to 2g in fig. 1. Wherein, the air distribution interface 2a of the upper air chamber 87 in the air distribution component I8 a is connected with an external air source, and the air distribution interface 2b of the middle air chamber 86 in the air distribution component I8 a is connected with the middle air bag of the lifting shaft; the air distribution interface 2c of the upper air chamber 87 in the air distribution component II 8b is connected with the rear shaft left air bag, and the air distribution interface 2d of the middle air chamber 86 in the air distribution component II 8b is connected with the lifting shaft left air bag; the air distribution interface 2e of the upper air chamber 87 in the air distribution assembly III 8c is connected with the right air bag of the rear shaft, and the air distribution interface 2f of the middle air chamber 86 in the air distribution assembly III 8c is connected with the right air bag of the lifting shaft; the air distribution component I8 a, the air distribution component II 8b and the air distribution interface 2g of the lower air chamber 85 in the air distribution component III 8c are communicated with each other and connected with the pressure limiting valve.
As shown in fig. 11, a connecting channel is provided between the upper air chamber 87 and the middle air chamber 86 in each air distribution assembly 8, and a connecting channel is provided between the middle air chamber 86 and the lower air chamber 85. The air distribution assembly 8 further comprises a valve rod 83 which sequentially penetrates through the two connecting channels and is in sliding seal with the connecting channels, and an air distribution channel 84 is arranged on the valve rod 83. The air distribution channel 84 comprises grooves distributed on the side surface of the valve rod 83; the length of the groove along the length of the stem 83 is greater than the length of the connecting passage and less than or equal to the length of the intermediate air chamber 86.
As shown in fig. 8, each of the opening and closing assemblies 7 includes a transition air chamber 76 disposed in the housing, and the transition air chambers 76 between different air distribution modules 6 are communicated with each other. The transition air chamber 76 is communicated with the upper air chamber 87 of the corresponding air distribution module 6 through an air passage I75 (the communication with the other air chambers can be realized, but external parts of each air distribution interface need to be reasonably adjusted), and the opening and closing assembly 7 further comprises an opening and closing element 73 for controlling the opening and closing of the air passage I75. The opening and closing element 73 comprises a normally closed valve plate 731 corresponding to the air passage I75, and a driving valve core 72 for controlling the opening and closing of the normally closed valve plate 731.
As shown in fig. 3, the housing is further provided with an exhaust port 5, a transition air chamber 76 of the opening and closing assembly I7 a is communicated with the exhaust port 5 through an air duct II 74, and the driving valve core 72 in the corresponding air distribution module 6 controls the on-off of the air duct II 74.
As shown in fig. 3 and 8, the actuation valve plug 72 is disposed within a corresponding transition gas chamber 76, and the actuation valve plug 72 is slidably sealed to the wall of the transition gas chamber 76 and divides the transition gas chamber 76 into an upper transition gas chamber 78 and a lower transition gas chamber. The air passage I75 and the air passage II 74 are respectively connected with the lower transition air chamber.
As shown in fig. 10, each of the air distribution assemblies 8 further includes a driving unit 82, and the driving unit 82 drives the valve rod 83 to slide relative to the connecting channel. The driving unit 82 comprises a driving air chamber, a piston body 821 which moves synchronously with the valve rod 83 is arranged in the driving air chamber, two annular sliding grooves 822 are distributed on the side surface of the piston body 821 along the length direction, and a transition section 827 is formed between every two adjacent sliding grooves; piston rings 825 are respectively arranged in the two annular sliding grooves 822, and the piston rings 825 are respectively in sliding seal with the bottoms of the annular sliding grooves 822 and the side walls of the driving air chambers; the piston body 821 and piston ring 825 divide the drive chamber into an upper drive chamber 828 and a lower drive chamber 824; the side wall of the driving air chamber is provided with a blocking portion 826 corresponding to the piston ring 825, the blocking portion 826 is positioned between the two piston rings 825, and the blocking portion 826 is not in contact with the transition section 827. A transition cavity 823 is formed between the two piston rings 825, and the transition cavity 823 is communicated with an exhaust port 5. For equalizing the air pressure in the transition chamber 823 during movement of the piston body 821 and the piston ring 825.
As shown in fig. 6 and 8, the gas distribution device further includes a first control module, the first control module includes first control assemblies 3 corresponding to the gas distribution module 6 one by one, and the first control assemblies are a first control assembly I3 a, a first control assembly II 3b and a first control assembly III 3c, the first control assembly I3 a corresponds to the opening and closing assembly I7 a, the first control assembly II 3b corresponds to the opening and closing assembly II 7b, and the first control assembly III 3c corresponds to the opening and closing assembly III 7c.
As shown in fig. 8, each of the first control assemblies 3 includes a first control chamber disposed in the housing, the first control chamber is respectively provided with a first air inlet passage 32, a first air outlet passage 31 and a first control passage 33, the first air inlet passage 32 is connected with a control air source, and the first control passage 33 is communicated with an upper transition air chamber 78; and a first valve body 34 for controlling the on-off of the first air inlet channel 32 and the first exhaust channel 31 is also arranged in the first control cavity.
As shown in fig. 7 and 9, the system further includes a second control module, where the second control module includes two groups of second control assemblies 4, I4 a and II 4b.
As shown in fig. 9, each of the second control assemblies 4 includes a second control chamber disposed in the housing, the second control chamber is respectively provided with a second air inlet passage 44, a second air outlet passage 42 and a second control passage 45, and the second air inlet passage 44 is connected to a control air source. And a second valve body 43 for controlling the on-off of the second air inlet channel 44 and the second air outlet channel 42 is also arranged in the first control cavity. The first control assembly 3 and the second control assembly 4 are basically identical in structure and control principle.
As shown in FIG. 9, the second control passage 45 of the second control assembly I4 a communicates with the lower drive chamber 824 of the air distribution assembly I8 a and simultaneously communicates with the upper drive chambers 828 of the air distribution assembly II 8b and the air distribution assembly III 8c. The second control passage 45 of the second control assembly II 4b communicates with the upper drive chamber 828 of the air distribution assembly I8 a and simultaneously communicates with the lower drive chambers 824 of the air distribution assembly II 8b and the air distribution assembly III 8c.
The working principle of the air distribution assembly and the opening and closing assembly is described below by taking one of the air distribution modules as an example:
as shown in fig. 8, when the first air inlet channel 32 of the first control assembly I3 a is opened, the first exhaust channel 31 is closed, and the external air supply reaches the upper transition chamber 823 from the first control channel 33, so as to push the driving valve core 72 to move toward the normally closed valve plate 731, and finally contact with the normally closed valve plate 731 and overcome the normally closed valve plate 731, thereby opening the air passage I75. When the first air inlet passage 32 of the first control assembly I3 a is closed, the first exhaust passage 31 is opened, the air pressure in the upper transition chamber 823 is exhausted from the first exhaust passage 31, the normally closed valve plate 731 is reset to close the air passage I75, and the driving valve plug 72 is pushed to reset.
When the second air inlet passage 44 of the second control assembly II 4b is open, the second air outlet passage 42 is closed, and the second air inlet passage 44 of the second control assembly I4 a is closed, the second air outlet passage 42 is open, the external air source enters the upper drive chamber 828 through the second control passage 45 of the second control assembly II 4b, and the lower drive chamber 824 communicates with the second air outlet passage 42 of the second control assembly I4 a. At this point the upper drive chamber 828 is at a higher pressure than the lower drive chamber 824, and the piston body 821 and piston ring 825 move downward to a lower limit as a result of the pneumatic force. The lower limit is such that the piston ring 825 corresponding to the upper drive chamber 828 contacts the stop 826, and the piston ring 825 contacts the upper groove wall of the corresponding runner. Due to the synchronized movement of the valve body with piston body 821, the valve body also moves to the lower limit position where intermediate air chamber 86 and lower air chamber 85 are in communication.
When the second air inlet passage 44 of the second control assembly II 4b is closed, the second air outlet passage 42 is opened, and the second air inlet passage 44 of the second control assembly I4 a is opened, the second air outlet passage 42 is closed, the external air source enters the lower driving chamber 824 through the second control passage 45 of the second control assembly I4 a, and the upper driving chamber 828 is communicated with the second air outlet passage 42 of the second control passage 45 b. At this point, the pressure in lower drive chamber 824 is greater than the pressure in lower drive chamber 824, and piston body 821 and piston ring 825 move upward to an upper limit under the force of the gas pressure. The upper limit is such that the piston ring 825 corresponding to the lower drive chamber 824 contacts the blocking portion 826 and the piston ring 825 contacts the lower groove wall of the corresponding runner. Due to the synchronized movement of the valve body and piston body 821, the valve body also moves to an upper limit position where the upper plenum 87 and the middle plenum 86 are in communication.
When the second intake passages 44 of the second control module I4 a and the second control module II 4b are simultaneously open, the second exhaust passages 42 are simultaneously closed,
at this time, the upper driving chamber 828 and the lower driving chamber 824 are both communicated with the external air source. Analysis of both piston rings 825 shows that both piston rings 825 slide against stop 826 under the force of air pressure because both upper drive cavity 828 and lower drive cavity 824 are at a greater air pressure than transition cavity 823. The piston body 821 is analyzed individually, the pressure difference between the two ends and the thrust force after the piston ring 825 contacts with the transition section 827 push the piston body to move together, the piston body moves to the transition section 827 and corresponds to the blocking section 826, and when at least one of the piston rings 825 contacts with the blocking section 826, a mechanical balance state can be achieved. At this time, since the valve body and the piston body 821 move synchronously, the valve body also moves to the middle balance position, at this time, the two air distribution passages 84 are both closed, and the upper air chamber 87, the middle air chamber 86 and the lower air chamber 85 are uniformly communicated.
Specifically describing the stress condition of the piston body 821 in the equilibrium state, since the end of the piston body 821 corresponding to the lower driving chamber 824 is connected to the valve rod 83, the pressure area of the upper end of the piston body 821 is larger than that of the lower end, and the resultant force of the air pressures at the two ends is downward, which tends to move downward. At this time, both piston rings 825 have an upward acting force (friction force or thrust force transmitted through the transition section 827) on the piston body 821 to balance the resultant downward force due to the pressure area difference, and finally reach a balanced state.
The working principle of the air suspension system is explained in detail below with reference to the specific structure of the ECAS air distribution valve assembly:
1. the left air bag of the rear shaft, the right air bag of the rear shaft, the left air bag of the lifting shaft and the right air bag of the lifting shaft are inflated
In the initial state, the valve rod 83 of the air distribution assembly I8 a is located at the lower limit position, and the valve rods 83 of the air distribution assembly II 8b and the air distribution assembly III 8c are located at the upper limit position (the state can be realized by opening the second control assembly II 4 b), namely, the middle air bag of the lifting shaft is communicated with the pressure limiting valve, the left air bag of the lifting shaft is communicated with the left air bag of the rear shaft, and the right air bag of the lifting shaft is communicated with the right air bag of the rear shaft. The lift shaft intermediate bladder is now deflated.
And opening the first control assembly I3 a, the first control assembly II 3b and the first control assembly III 3c to enable the first air inlet channel 32 and the first control channel 33 of the first control assembly I3 a, the first control assembly II 3b and the first control assembly III 3c to be communicated, further driving the corresponding driving valve core 72 to move downwards, ejecting the normally closed valve plate 731, opening the air channel I75, and simultaneously opening and closing the driving valve core 72 in the assembly I to close the air channel II 74.
At this time, an external air source enters from the upper air chamber 87 of the air distribution assembly I8 a, enters the lower transition cavity 823 through the air passage I75 in the opening and closing assembly I8 a, and enters the upper air chamber 87 and the middle air chamber 86 of the air distribution assembly II 8b and the air distribution assembly III 8c through the opening and closing assembly II 7b and the air passage I75 in the opening and closing assembly III 7c, so that the rear axle left air bag, the rear axle right air bag, the lifting axle left air bag and the lifting axle right air bag are inflated. After the first control assembly I3 a, the first control assembly II 3b and the first control assembly III 3c are closed, the states are kept unchanged.
2. The left air bag of the rear shaft, the right air bag of the rear shaft, the left air bag of the lifting shaft and the right air bag of the lifting shaft are deflated
And on the premise of inflating the rear axle left and right air bags and the lifting axle left and right air bags, the first control assembly I3 a is closed, and the first control assembly II 3b and the first control assembly III 3c are opened. At the moment, the air passage I75 in the opening and closing assembly I7 a is closed by the normally closed valve plate 731, and meanwhile, the air passage II 74 is opened; and an air passage I75 in the opening and closing assembly II 7b and the opening and closing assembly III 7c is opened.
Because the air flue I75 in the opening and closing assembly I7 a is closed, an external air source cannot enter the air distribution assembly II 8b and the air distribution assembly III 8c. Meanwhile, as the air passage II 74, the air passage I75 in the opening and closing component II 7b and the air passage I75 in the opening and closing component III 7c are opened, the air pressure of the rear axle left air bag, the rear axle right air bag, the lifting axle left air bag and the lifting right air bag is discharged from the air passage II 74, and the rear axle left air bag, the rear axle right air bag, the lifting axle left air bag and the lifting right air bag are deflated. The state of the first control assembly II 3b and the first control assembly III 3c is kept unchanged after being closed.
3. Lift shaft intermediate air bag inflation
The initial state is that the rear axle left air bag, the rear axle right air bag, the lifting axle left air bag and the lifting right air bag are all deflated.
The second control assembly I4 a is opened, the second control assembly II 4b is closed (the three first control assemblies are all in a closed state), an air inlet channel in the second control assembly I4 a is communicated with the control channel and is communicated with the lower driving cavity 824 of the air distribution assembly I8 a, the valve rod 83 of the air distribution assembly I8 a moves to an upper limit position under the pushing of the air pressure of the lower driving cavity 824, and at the moment, the external air source is communicated with the middle air bag of the lifting shaft to inflate the middle air bag of the lifting shaft. The state remains unchanged after power down.
4. Air bag deflation in the middle of the lifting shaft
Under the inflation state of the middle air bag of the lifting shaft, the second control assembly II 4b is started, the second control assembly I4 a is closed (the three first control assemblies are all in the closed state), an air inlet channel in the second control assembly II 4b is communicated with a control channel and is communicated with a lower driving cavity 824 of the air distribution assembly II 8b, a valve rod 83 of the air distribution assembly I8 a moves to a lower limit position under the pushing of the air pressure of an upper driving cavity 828, the middle air bag of the lifting shaft is communicated with a pressure limiting valve at the moment, a high-pressure air source in the middle air bag of the lifting shaft is discharged from the pressure limiting valve, and the deflation of the middle air bag of the lifting shaft is completed. The state remains unchanged after power down.
5. State of unbalance loading
The initial state is that the rear shaft left air bag, the rear shaft right air bag, the lifting shaft left air bag and the lifting shaft right air bag are inflated, and the middle air bag of the lifting shaft is deflated.
When the second control module I4 a and the second control module II 4b are opened at the same time, the valve rods 83 in the three air distribution modules 4 are all in the middle state (the specific implementation principle is described in detail above), and at this time, the upper air chamber 87, the middle air chamber 86 and the lower air chamber 85 in the three air distribution modules 4 are not communicated with each other. And then, according to the loaded condition of the vehicle body, the three first control assemblies 3 are controlled to be opened and closed, and the rear axle left air bag and the rear axle right air bag are inflated and deflated to adapt to the unbalanced loading state of the vehicle body.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An ECAS distribution valve assembly, which is characterized in that: the gas distribution device comprises a shell, wherein at least three groups of gas distribution modules (6a, 6b and 6c) are arranged in the shell, and a gas distribution assembly (8a, 8b and 8c) and an opening and closing assembly (7a, 7b and 7c) are arranged in each gas distribution module (6a, 6b and 6c);
the air distribution assembly (8a, 8b, 8c) comprises an upper air chamber (87), a middle air chamber (86) and a lower air chamber (85) which are sequentially arranged in a shell, and air distribution interfaces (2a, 2b,2c,2d,2e,2f and 2g) are respectively arranged in the upper air chamber (87), the middle air chamber (86) and the lower air chamber (85); a connecting channel is arranged between the upper air chamber (87) and the middle air chamber (86), and a connecting channel is arranged between the middle air chamber (86) and the lower air chamber (85); the air distribution assembly (8a, 8b and 8c) also comprises a valve rod (83) which sequentially penetrates through the two connecting channels and is in sliding seal with the connecting channels, and an air distribution channel (84) is arranged on the valve rod (83);
the opening and closing assembly (7a, 7b, 7c) comprises a transition air chamber (76) arranged in a shell, the transition air chamber (76) is communicated with an upper air chamber (87) or a middle air chamber (86) or a lower air chamber (85) of a corresponding air distribution module (6a, 6b, 6c) through an air passage I (75), and the opening and closing assembly (7a, 7b, 7c) further comprises an opening and closing element (73) for controlling the opening and closing of the air passage I (75);
transition air chambers (76) among different air distribution modules (6a, 6b, 6c) are communicated with each other;
the opening and closing element (73) comprises a normally closed valve plate (731) corresponding to the air channel I (75) and a driving valve plug (72) for controlling the normally closed valve plate to open and close;
the driving valve core (72) is in sliding seal with the cavity wall of the transition air chamber (76), the transition air chamber (76) is divided into an upper transition air chamber (78) and a lower transition air chamber, and the air passage I (75) and the air passage II (74) are respectively connected with the lower transition air chamber;
the gas distribution device is characterized by further comprising a first control module, wherein the first control module comprises first control assemblies (3a, 3b and 3c) which correspond to the gas distribution modules (6a, 6b and 6c) one to one, each first control assembly (3a, 3b and 3c) comprises a first control cavity arranged in the shell, the first control cavity is respectively provided with a first gas inlet channel (32), a first gas exhaust channel (31) and a first control channel (33), the first gas inlet channel (32) is connected with a control gas source, and the first control channel (33) is communicated with the upper transition gas chamber (78);
a first valve body (34) for controlling the on-off of the first air inlet channel (32) and the first exhaust channel (31) is also arranged in the first control cavity;
the air distribution assembly (8a, 8b, 8c) further comprises a driving unit (82), and the driving unit (82) drives a valve rod (83) to slide relative to the connecting channel; the driving unit (82) comprises a driving air chamber, a piston body (821) which moves synchronously with the valve rod (83) is arranged in the driving air chamber, two annular sliding grooves (822) are distributed on the side surface of the piston body (821) along the length direction, and a transition section (827) is formed between every two adjacent sliding grooves; piston rings (825) are respectively arranged in the two annular sliding grooves (822), and the piston rings (825) are respectively in sliding seal with the bottoms of the sliding grooves and the side walls of the driving air chambers;
the piston body (821) and the piston ring (825) divide the driving air chamber into an upper driving cavity (828) and a lower driving cavity (824);
the side wall of the driving air chamber is provided with a blocking part (826) corresponding to the piston rings (825), the blocking part (826) is positioned between the two piston rings (825), and the blocking part (826) is not contacted with the transition section (827);
the air distribution system further comprises a second control module, wherein the second control module controls the air pressure of an upper driving cavity (828) and a lower driving cavity (824) in the three air distribution assemblies (8a, 8b and 8c) respectively; the second control module comprises two groups of second control components (4a, 4b),
each second control assembly (4 a,4 b) comprises a second control cavity arranged in the shell, the second control cavity is respectively provided with a second air inlet channel (44), a second air outlet channel (42) and a second control channel (45), and the second air inlet channel (44) is connected with a control air source; a second valve body (43) for controlling the on-off of a second air inlet channel (44) and a second air outlet channel (42) is also arranged in the first control cavity;
the upper driving cavity (828) of each air distribution assembly (8a, 8b, 8c) is communicated with the control channel of one group of second control assemblies (4a, 4b), and the lower driving cavity (824) is communicated with the control channel of the other group of second control assemblies (4a, 4b).
2. The ECAS valve assembly as set forth in claim 1, wherein: the driving valve core (72) is arranged in the transition air chamber (76); the shell is also provided with an exhaust port (5), a transition air chamber (76) of one air distribution module (6 a,6b,6 c) is communicated with the exhaust port (5) through an air passage II (74), and a driving valve core (72) in the corresponding air distribution module (6 a,6b,6 c) controls the on-off of the air passage II (74).
3. The ECAS valve assembly as set forth in claim 1, wherein: the air distribution channel (84) comprises grooves distributed on the side surface of the valve rod (83); the length of the groove is greater than the length of the connecting channel and less than or equal to the length of the intermediate air chamber (86) in the direction along the length of the valve stem (83).
4. The ECAS valve assembly as set forth in claim 1, wherein: a transition cavity (823) is formed between the two piston rings (825), and the transition cavity (823) is communicated with an exhaust port (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747361.5A CN110466305B (en) | 2019-08-14 | 2019-08-14 | ECAS distributing valve assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747361.5A CN110466305B (en) | 2019-08-14 | 2019-08-14 | ECAS distributing valve assembly |
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| CN110466305A CN110466305A (en) | 2019-11-19 |
| CN110466305B true CN110466305B (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910747361.5A Active CN110466305B (en) | 2019-08-14 | 2019-08-14 | ECAS distributing valve assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114046330B (en) * | 2021-09-23 | 2023-06-02 | 东科克诺尔商用车制动技术有限公司 | Automobile air suspension electromagnetic control valve |
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