CN115817096B - Compressed air supply facility, control method, system, controller and storage medium - Google Patents
Compressed air supply facility, control method, system, controller and storage mediumInfo
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- CN115817096B CN115817096B CN202211572751.1A CN202211572751A CN115817096B CN 115817096 B CN115817096 B CN 115817096B CN 202211572751 A CN202211572751 A CN 202211572751A CN 115817096 B CN115817096 B CN 115817096B
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Abstract
本发明公开了一种压缩空气供应设施、控制方法、系统、控制器和存储介质，压缩空气供应设施应用于空气悬架系统，该设施包括：与周围环境连通的气体通口、气动排气阀、排气电磁阀和空气弹簧模块，排气电磁阀的一端与空气弹簧模块连接，另一端与气动排气阀的第一接口连接，气动排气阀的第二接口和第三接口连接，气动排气阀的第四接口与气体通口连接，排气电磁阀用于控制空气弹簧模块的高压气体流向气动排气阀的所述第一接口，以使第一接口与第二接口连通、第三接口与第四接口连通，使得高压气体从气体通口排出，其中，两位两通的排气电磁阀可使气动排气阀保留一定残余压力，降低排气电磁阀开启造成的压力冲剂，增加排气电磁阀寿命，提高排气速度。
The present invention discloses a compressed air supply facility, a control method, a system, a controller and a storage medium. The compressed air supply facility is applied to an air suspension system. The facility includes: a gas port connected to the surrounding environment, a pneumatic exhaust valve, an exhaust solenoid valve and an air spring module. One end of the exhaust solenoid valve is connected to the air spring module, and the other end is connected to the first interface of the pneumatic exhaust valve. The second interface and the third interface of the pneumatic exhaust valve are connected. The fourth interface of the pneumatic exhaust valve is connected to the gas port. The exhaust solenoid valve is used to control the high-pressure gas of the air spring module to flow to the first interface of the pneumatic exhaust valve, so that the first interface is connected to the second interface and the third interface is connected to the fourth interface, so that the high-pressure gas is discharged from the gas port. The two-position two-way exhaust solenoid valve can make the pneumatic exhaust valve retain a certain residual pressure, reduce the pressure surge caused by the opening of the exhaust solenoid valve, increase the service life of the exhaust solenoid valve, and improve the exhaust speed.
Description
Technical Field
The application relates to the technical field of compressed air devices, in particular to a compressed air supply facility, a control method, an air suspension system, a controller and a storage medium.
Background
Currently, air suspension systems are widely applied to commercial vehicles such as large buses and heavy trucks, and the air suspension systems mainly utilize air springs to absorb tiny vibration, so that comfort of users is improved when the users ride, and the height of the vehicles can be adjusted to be at a preset height by a method of controlling the pressure of the air springs, so that running stability of the vehicles is improved;
The existing air suspension system generally realizes the exhaust of a compressed air supply facility by controlling the on-off of a pneumatic exhaust electromagnetic valve, wherein most of pneumatic exhaust valves are two-position three-way electromagnetic valves, the pressure of a pre-control chamber of each pneumatic exhaust valve can be controlled to be converted from ambient atmosphere to the pressure in an air spring/compressed air storage, the pressure of a corresponding chamber of each pneumatic exhaust valve is suddenly changed when the two-position three-way electromagnetic valve is conducted, the pre-tightening spring is impacted, the service life of each pneumatic exhaust valve is influenced, and the exhaust reliability of the compressed air supply facility and the air suspension system is reduced.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein.
The embodiment of the application provides a compressed air supply facility, a control method, an air suspension system, a controller and a storage medium, which at least can ensure that the scheme of the application can effectively reduce the spring pretightening force requirement on a pneumatic exhaust valve, prolong the service life of the pneumatic exhaust valve and improve the exhaust reliability of the compressed air supply facility and the air suspension system.
An embodiment of the first aspect of the invention provides a compressed air supply facility, which is applied to an air suspension system and comprises an air port communicated with the surrounding environment, a pneumatic exhaust valve, an exhaust electromagnetic valve and an air spring module, wherein one end of the exhaust electromagnetic valve is connected with the air spring module, the other end of the exhaust electromagnetic valve is connected with a first interface of the pneumatic exhaust valve, a second interface and a third interface of the pneumatic exhaust valve are connected, and a fourth interface of the pneumatic exhaust valve is connected with the air port.
The exhaust electromagnetic valve is used for controlling high-pressure gas of the air spring module to flow to the first interface of the pneumatic exhaust valve, so that the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface, and the high-pressure gas is exhausted from the gas through hole.
The compressed air supply facility at least has the advantages that the compressed air supply facility is applied to an air suspension system and comprises an air through hole, a pneumatic exhaust valve, an exhaust electromagnetic valve and an air spring module, wherein the air through hole is communicated with the surrounding environment, one end of the exhaust electromagnetic valve is connected with the air spring module, the other end of the exhaust electromagnetic valve is connected with a first connector of the pneumatic exhaust valve, a second connector and a third connector of the pneumatic exhaust valve are connected, a fourth connector of the pneumatic exhaust valve is connected with the air through hole, the exhaust electromagnetic valve is used for controlling high-pressure air of the air spring module to flow to the first connector of the pneumatic exhaust valve, the first connector is communicated with the second connector, the third connector is communicated with the fourth connector, the high-pressure air is exhausted from the air through hole, the exhaust electromagnetic valve is arranged to be a two-position two-way electromagnetic valve and is arranged between the pneumatic exhaust valve and the air spring module, when the exhaust valve is closed, the exhaust electromagnetic valve stops exhausting, a certain residual pressure can be reserved, on one hand, the pressure of a next pre-control pressure chamber is reduced, on the other hand, the reliability of the exhaust electromagnetic valve is improved, and on the other hand, the reliability is improved.
In some embodiments, a throttle valve and a dryer section are disposed on the air path between the second port and the third port.
In some embodiments, the compressed air supply facility further comprises an air compression part and a check valve, a gas inlet of the air compression part is connected with the gas through hole, a gas outlet of the air compression part is connected with one end of the drying part, and the other end of the drying part is connected with the air spring module through the check valve.
In some embodiments, the third interface is connected to the gas outlet and the drying part, respectively, and the pneumatic exhaust valve is configured to communicate the third interface with the fourth interface so that high-pressure gas from the gas outlet flows from the fourth interface to the gas port and is exhausted when the pre-control pressure at the third interface is greater than a pressure threshold.
In some embodiments, the air spring module includes an air spring control assembly including a plurality of air spring valves, the air suspension system further includes an air reservoir and a plurality of air springs, the air spring valves are connected with the air springs, the air spring control assembly is connected with the air reservoir through a first reversing solenoid valve, and the first reversing solenoid valve is used for controlling the inlet and outlet of air in the air reservoir.
In some embodiments, the air compression part is a secondary compression part, the secondary compression part comprises a first pressure stage and a second pressure stage, the gas inlet is the gas inlet of the first pressure stage, the gas outlet is the gas outlet of the second pressure stage, the gas outlet of the first pressure stage is connected with the gas inlet of the second pressure stage, the gas storage tank is connected with the gas inlet of the second pressure stage through a second reversing electromagnetic valve, and the second reversing electromagnetic valve is used for controlling the gas in the gas storage tank to flow to the second pressure stage and flow to the air spring module after being compressed by the second pressure stage.
In some embodiments, the inside and the gas through hole of pneumatic discharge valve are connected, pneumatic discharge valve includes pneumatic push rod, low pressure restriction spring and high pressure restriction spring, pneumatic push rod set up in between the first interface with between the second interface, just pneumatic push rod set up in between the third interface with the fourth interface, pneumatic push rod's one end is connected respectively low pressure restriction spring with high pressure restriction spring the pressure of high-pressure gas in first interface department acting on pneumatic push rod is greater than low pressure restriction spring with under the high pressure restriction spring acts on respectively under the pretightning force and the deforming force's of pneumatic push rod circumstances, first interface with the second interface intercommunication, the third interface with the fourth interface intercommunication.
In some embodiments, the third port communicates with the fourth port in the event that the pressure of the high pressure gas acting on the pneumatic ram at the third port is greater than the deforming force of the high pressure limiting spring acting on the pneumatic ram.
An embodiment of the second aspect of the present invention provides a control method of a compressed air supply facility, applied to a compressed air supply facility, the compressed air supply facility including a gas port communicating with an ambient environment, a pneumatic exhaust valve, an exhaust solenoid valve, and an air spring module, one end of the exhaust solenoid valve being connected to the air spring module, the other end being connected to a first port of the pneumatic exhaust valve, a second port and a third port of the pneumatic exhaust valve being connected, a fourth port of the pneumatic exhaust valve being connected to the gas port, the method comprising:
and controlling the exhaust electromagnetic valve to be communicated, so that high-pressure gas in the air spring module flows to the pneumatic exhaust valve, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface, so that the high-pressure gas is exhausted from the gas through hole.
In some embodiments, the compressed air supply facility further comprises an air compression section, the third interface being connected to a gas outlet of the air compression section, the method further comprising:
And controlling the air compression part to output high-pressure gas through the gas outlet, wherein the third interface in the pneumatic exhaust valve is communicated with the fourth interface under the condition that the pre-control pressure at the third interface of the pneumatic exhaust valve is greater than a pressure threshold value, so that the high-pressure gas flows from the fourth interface to the gas through hole and is discharged.
In some embodiments, the air spring module includes an air spring control assembly and an air reservoir, the air spring module includes an air spring control assembly, the air suspension system further includes an air reservoir, the method further includes:
And controlling the gas in the gas storage tank to enter and exit through the first reversing electromagnetic valve.
In some embodiments, the air compression portion is a secondary compression portion comprising a first pressure stage and a second pressure stage, the air reservoir being connected to an air inlet of the second pressure stage by a second reversing solenoid valve, the method further comprising:
And controlling the second reversing electromagnetic valve to be communicated so that the gas in the gas storage tank flows to the second pressure stage, and flows to the air spring module after being compressed by the second pressure stage.
An embodiment of a third aspect of the invention provides an air suspension system comprising a compressed air supply arrangement according to an embodiment of any one of the first aspects above.
An embodiment of a fourth aspect of the present invention provides a controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the compressed air supply facility control method according to any one of the embodiments of the second aspect when executing the computer program.
An embodiment of a fifth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the compressed air supply facility control method according to any one of the embodiments of the second aspect.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a schematic view of the air circuit of a compressed air supply apparatus for an air suspension system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the air circuit of a compressed air supply device for an air suspension system according to another embodiment of the present invention;
FIG. 3 is a schematic view of the air circuit of the compressed air supply facility for high pressure protection of the air suspension system according to another embodiment of the present invention;
FIG. 4 is a cross-sectional view of a pneumatic exhaust valve in a compressed air supply facility according to another embodiment of the present invention in a closed state;
FIG. 5 is a cross-sectional view of a pneumatic exhaust valve in a compressed air supply facility according to another embodiment of the present invention in a deflated state;
FIG. 6 is a cross-sectional view of a pneumatic exhaust valve in a compressed air supply facility in a high pressure protection state according to another embodiment of the present invention;
FIG. 7 is a flow chart of a method of controlling a compressed air supply facility according to another embodiment of the present invention;
FIG. 8 is a flow chart illustrating a method for controlling a compressed air supply facility according to another embodiment of the present invention, in which a third interface is connected to a fourth interface;
FIG. 9 is a flow chart illustrating communication between a second reversing solenoid valve in a method for controlling a compressed air supply facility according to another embodiment of the present invention;
Fig. 10 is a schematic view of a controller for operating a control method of a compressed air supply facility according to another embodiment of the present invention.
The air supply device comprises a reference numeral 1, an air inlet, a 2, an air compression part, a 3, a drying part, a 4, a one-way valve, 5 to 8, an air spring valve, 9, an air storage tank, 10, a first reversing electromagnetic valve, 11, a second reversing electromagnetic valve, 12, an exhaust electromagnetic valve, 13, a pneumatic exhaust valve, 14, a throttle valve, 15 to 18, an air spring, 19, a pressure sensor, 100, a compressed air supply facility, 101, a pneumatic push rod, 102, a low-pressure limiting spring, 103, a high-pressure limiting spring, 200, an air path node, 300, an air spring module, 1000 and an air suspension system.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Currently, a compressed air supply facility is widely used in commercial vehicles such as large buses and heavy trucks, and mainly uses an air spring to absorb minute vibrations, thereby improving comfort of a user while riding, and adjusting the height of the vehicle to a predetermined height by performing pressure control on the air spring, thereby improving running stability of the vehicle.
The existing compressed air supply facilities generally realize the exhaust of the compressed air supply facilities by controlling the on-off of the pneumatic exhaust electromagnetic valve, wherein one end of the pneumatic exhaust valve is always connected with the air spring and/or the compressed air storage, so that the pressure of a corresponding chamber of the pneumatic exhaust valve can change along with the pressure change in the air spring and/or the compressed air storage, the spring pretightening force requirement on the pneumatic exhaust valve is higher, the service life of the pneumatic exhaust valve is influenced, and the exhaust reliability of the compressed air supply facilities is reduced.
Based on the above, the embodiment of the invention provides a compressed air supply facility, a control method, an air suspension system, a controller and a storage medium, according to the technical scheme of the embodiment of the invention, the compressed air supply facility is connected with one end of an air exhaust electromagnetic valve through an air spring module, the other end of the air exhaust electromagnetic valve is connected with a first interface of a pneumatic exhaust valve, a second interface of the pneumatic exhaust valve is connected with a third interface of the pneumatic exhaust valve, a fourth interface of the pneumatic exhaust valve is connected with a gas through hole, the air exhaust electromagnetic valve is used for controlling high-pressure gas of the air spring module to flow to the pneumatic exhaust valve so as to enable the first interface to be communicated with the second interface, and the third interface is communicated with the fourth interface so as to enable the high-pressure gas to be exhausted from the gas through hole, wherein the air exhaust electromagnetic valve is arranged between the pneumatic exhaust valve and the air spring module, when the air exhaust electromagnetic valve is closed, the air exhaust valve can keep certain residual pressure when the air exhaust valve stops, on one hand, abrupt change of the pressure of a pre-control pressure chamber when the air exhaust electromagnetic valve is opened next time is reduced, on the other hand, the reliability of the air exhaust valve is improved, and on the other hand, the air valve can be depressurized quickly, and the speed is improved.
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 1 is a gas circuit state diagram of a compressed air supply facility 100 applied to an air suspension system 1000 according to an embodiment of the present invention.
In some embodiments, the compressed air supply facility 100 comprises a gas through hole 1 communicated with the surrounding environment, a pneumatic exhaust valve 13, an exhaust electromagnetic valve 12 and an air spring module 300, wherein the gas through hole 1 is used for sucking air from the surrounding environment and exhausting air to the surrounding environment by the compressed air supply facility 100, the air spring module 300 is used for controlling the pressure of an air spring to adjust the height of a vehicle to a preset height, the pneumatic exhaust valve 13 and the exhaust electromagnetic valve 12 are used for controlling the air inlet and the air outlet of the air spring module 300, the air spring module 300 is connected with one end of the exhaust electromagnetic valve 12, the other end of the exhaust electromagnetic valve 12 is connected with a first interface of the pneumatic exhaust valve 13, a second interface of the pneumatic exhaust valve 13 and a third interface of the pneumatic exhaust valve 13 are connected with the gas through hole 1, the exhaust electromagnetic valve 12 is used for controlling the high-pressure air of the air spring module 300 to flow to the pneumatic exhaust valve 13 so that the first interface is communicated with the second interface, the third interface is communicated with the fourth interface to enable the high-pressure air to be exhausted from the gas through hole 1, the electromagnetic valve 12 has the function of pre-control the pneumatic valve 13, when the pressure in the system is enough to enable the air to be dried to pass through the air through hole 13, and the air exhaust valve 13 is opened to the safe air system to the safe environment when the high-pressure is completely exceeds the pressure in the air system, and the air is processed, and the safety system is also air safe to be exhausted to the environment.
Referring to fig. 1, the air suspension system 1000 has a compressed air supply facility 100, an air tank 9 for functioning as a compressed air storage device, and air springs 15, 16, 17, 18.
The compressed air supply facility 100 includes:
a gas port 1 communicating with the environment;
An air compression part 2 for supplying compressed air;
a drying part 3 for drying the compressed air, the drying part 3 being connected to the air compressing part 2;
A check valve 4 for preventing the compressed gas from flowing back to the drying part 3;
air spring valves 5,6,7,8 for respectively controlling the ingress and egress of compressed air by front air springs 15 and 16, and rear axle air springs 17 and 18;
A first reversing solenoid valve 10 for controlling the ingress and egress of compressed air within the air reservoir 9;
A second reversing solenoid valve 11 for causing the high-pressure gas in the gas tank 9 to flow again to the air compressing portion 2;
a two-position two-way exhaust solenoid valve 12 and a pneumatic exhaust valve 13 for controlling the exhaust of compressed air in the system to the environment.
In some embodiments, in order to realize the compressed air storage function of the air suspension system 1000, the air storage tank 9 is connected to the main line of the outlet of the high pressure stage 2.2 of the air compression part 2 of the compressed air supply facility 100 through the air storage tank reversing air path where the second reversing solenoid valve 11 is located, wherein, in order to realize the secondary compression of air, the air compression part 2 comprises a low pressure stage 2.1 and a high pressure stage 2.2, the air outlet of the low pressure stage 2.1 is connected to the air inlet of the high pressure stage 2.2 by default, the low pressure stage 2.1 is used for performing the first compression of air, the high pressure stage 2.2 is used for performing the second compression of air, in order to supplement the compressed air to the air spring group 300, the air spring lines where the air spring valves 5, 6, 7, 8 are located are connected to the main air path where the pneumatic exhaust valve 13 and the air exhaust solenoid valve 12 are located through the air path node 200, and are also connected to the reversing line where the air storage tank 9 is located, in order to realize the deflation function of the air spring module 300, the air spring module 300 is also connected to the air release line where the air solenoid valve 12 is located through the node 200, and finally connected to the air outlet 1 through the pneumatic valve 13, the high pressure stage 2 is used for performing the second compression of air in order to perform the second compression of air in the air spring group 300, and the air spring 2 is compressed to reach the high pressure 2, and the high pressure stage 2 is compressed in the air inlet 2, and the air compression of the air spring 2 is compressed by the high pressure stage 2.
In some embodiments, the compressed air supply facility 100 pre-controls the pneumatic exhaust valve 13 via the exhaust solenoid valve 12, wherein the exhaust solenoid valve 12 acts as a pre-control valve, the facility being characterized in that only a relatively low force is required for setting the pneumatic exhaust valve 13, thus resulting in less loss of operating force of the pre-control valve, while at the same time the exhaust path can be increased, reducing exhaust noise.
In some embodiments, the exhaust solenoid valve 12 in the present application is a two-position two-way exhaust solenoid valve, and is used as a pre-control solenoid valve in the compressed air supply facility 100, so that the controllability and reliability of the pneumatic exhaust valve 13 can be effectively ensured, and the structure of the compressed air supply facility 100 can be further improved, so that the structure of the compressed air supply facility 100 is simple and effective.
In some embodiments, the pre-control solenoid valve in the prior art adopts a two-position three-way solenoid valve to switch the pre-control pressure chamber of the pneumatic exhaust valve 13 from being connected with the environment to being connected with an air spring and/or a compressed air storage, so that the pre-control pressure is changed, and the on-off of the pneumatic exhaust solenoid valve 12 is controlled, however, the other end (the second pre-control pressure chamber) of the pre-control pressure is always connected with the air spring and/or a compressed air storage, which can lead to the pressure of the second pre-control pressure chamber to be changed along with the change of the pressure in the air spring and/or the compressed air storage, when the pressure of the second pre-control pressure chamber is overlarge, the pneumatic exhaust valve 13 can be opened under the uncontrollable condition, or a pre-compression spring with extremely high rigidity is required to generate enough pre-pressure, so that the size of the spring is enlarged, and the volume of the whole pneumatic exhaust valve 13 is enlarged, so that the structural compactness of the compressed air supply facility 100 is influenced, and the reliability of the pneumatic exhaust valve 13 is always connected, the first pre-control chamber of the pneumatic exhaust valve 13 is always communicated with the environment, and the two-position two-way exhaust solenoid valve 12 is kept in communication with the air, and the pressure of the pneumatic exhaust valve 13 is always, and the two-position pre-control pressure chamber is always, and the pressure of the air valve 13 is always connected with the air spring and/compressed air storage is always, and the air storage is always connected with the air spring, and/is connected with the air spring, and/or the air storage valve is connected with the air valve, and/air valve 13, and the air valve is connected with the air valve and the air storage system, and the air valve 13.
The first pre-control chamber of the pneumatic exhaust valve 13 corresponds to the fourth interface of the pneumatic exhaust valve 13 mentioned in the application, the second pre-control chamber of the pneumatic exhaust valve 13 corresponds to the first interface of the pneumatic exhaust valve 13 mentioned in the application, the first pre-control chamber keeps constant pressure, the second pre-control chamber is communicated with the air spring and/or the air storage tank 9 through a two-position through exhaust electromagnetic valve, the second interface of the pneumatic exhaust valve 13 is connected with the third interface, the air release process of the compressed air supply facility 100 is realized by controlling the on-off of the pneumatic exhaust valve 13 through the exhaust electromagnetic valve 12, the high-pressure air of the air spring module 300 flows to the pneumatic exhaust valve 13 so that the first interface is communicated with the second interface, the third interface is communicated with the fourth interface, so that the high-pressure air is exhausted from the air vent 1, the exhaust electromagnetic valve can keep certain residual pressure for the pneumatic exhaust valve, the pressure granule caused by opening the exhaust electromagnetic valve is reduced, the service life of the exhaust electromagnetic valve is prolonged, the spring stiffness requirement and the size requirement are reduced, the space is saved, and the structure and the production difficulty of the pre-control electromagnetic valve is simplified.
In some embodiments, referring to fig. 1, the air discharge solenoid valve 12 and the air discharge valve 13 of the compressed air supply facility 100 in fig. 1 are in a closed state, corresponding to the air charging process of the air spring module 300 in the compressed air supply facility 100, referring to fig. 2, the air discharge solenoid valve 12 and the air discharge valve 13 of the compressed air supply facility 100 in fig. 2 are in a communicating state, corresponding to the air discharging process of the air spring module 300 in the compressed air supply facility 100, the air discharge valve 13 is opened under the control of the air discharge solenoid valve 12, the first interface A1 and the second interface A2 and the fourth interface B2 are both conducted with the third interface B1, the compressed air in the air spring flows from the interface A1 to the interface A2 after passing through the air discharge solenoid valve 12, then flows to the outlet of the drying part 3 after passing through the throttle valve 14, and then flows to the fourth interface B2 after being carried away by the drying part 3, and is discharged to the environment via the third interface B1 of the air discharge valve 13, wherein one end of the throttle valve 14 is connected to the second interface A2, the other end of the throttle valve 14 is connected to one end of the drying part 3, and the other end of the drying part 3 is connected to the third interface B1.
In some embodiments, the air path from the second port to the third port is sequentially provided with a throttle valve 14 and a drying part 3, the second port is connected to the air path between the drying part 3 and the one-way valve 4 through the throttle valve 14, the compressed air supply facility 100 further comprises an air compression part 2, the air inlet of the air compression part 2 is connected with the air through hole 1, the air outlet of the air compression part 2 is connected with the air spring module 300, and the air path from the high-pressure air in the air compression part 2 to the air spring module 300 is sequentially provided with the drying part 3 and the one-way valve 4.
Specifically, the air spring module 300 is connected with the air compression part 2 through a first air path, and is connected with the air port 1 through a second air path, the first air path is provided with the drying part 3 and the one-way valve 4, the first air path is an air charging path of the compressed air supply facility 100, the second air path is provided with the pneumatic exhaust valve 13 and the exhaust electromagnetic valve 12, and the second air path is an air discharging path of the compressed air supply facility 100, wherein in the air discharging process of the compressed air supply facility 100, the exhaust electromagnetic valve 12 is communicated so that a first interface of the pneumatic exhaust valve 13 is communicated with a second interface, a third interface is communicated with a fourth interface, and the second interface and the third interface are respectively connected with two ends of the drying part 3, so that air in the air spring module 300 sequentially passes through the exhaust electromagnetic valve 12, the first interface A1, the second interface A2, the drying part 3, the third interface B1 and the fourth interface B2 and is discharged from the air port 1.
In some embodiments, in the compressed air supply apparatus 100, the air port 1 is an inlet and an outlet of the compressed air supply apparatus 100 which are only communicated with the environment, the air compression part 2 is used for providing compressed air, the drying part 3 is used for drying the compressed air, the one-way valve 4 is used for preventing the compressed air from flowing back to the drying part 3, the air discharge electromagnetic valve 12 is a two-position two-way switch electromagnetic valve, referring to fig. 1, during the air charging process of the compressed air supply apparatus 100, the air discharge electromagnetic valve 12 is disconnected, the first interface is disconnected from the second interface, the third interface is disconnected from the fourth interface, the one-way valve 4 is arranged between the drying part 3 and the air spring module 300, and the one-way valve 4 is used for enabling the air to flow unidirectionally from the drying part 3 to the air spring module 300, so that the air sucked in by the air port 1 flows to the air spring module 300 sequentially through the air compression part 2, the drying part 3 and the one-way valve 4.
In some embodiments, the inside of the chamber of the pneumatic exhaust valve 13 always maintains the ambient pressure P0, the exhaust solenoid valve 12 is connected with the first port A1 of the pneumatic exhaust valve 13, the first port A1 is also a pre-control port of the pneumatic exhaust valve 13, the exhaust solenoid valve 12 provides the control pressure PS for the pneumatic exhaust valve 13, the inside chamber of the pneumatic exhaust valve 13 always communicates with the surrounding environment through the gas port 1, the internal pressure is ensured to be the ambient pressure P0, the control pressure PS is irrelevant to the pressure at the outlet of the drying part 3 during the exhaust of the compressed air supply facility 100, and the compressed air pressure from the first port A1 of the pneumatic exhaust valve 13 has a pre-control effect on the pneumatic exhaust valve 13.
The pressure of the drying back path 21.3 in the compressed air supply facility 100 does not generate force on the pneumatic exhaust valve 13, the acting area of the pressure in the drying front path 21.2 on the pneumatic exhaust valve 13 is smaller than that of the exhaust path 22, and the pneumatic exhaust valve 13 can be effectively ensured to stably exhaust high-pressure gas.
In some embodiments, the third port is connected to the gas outlet and the drying section 3, respectively, and the pneumatic exhaust valve 13 is configured to communicate with the fourth port to allow high pressure gas from the gas outlet to be exhausted from the gas port1 in the event that the pre-control pressure at the third port is greater than a pressure threshold.
Referring to fig. 3, fig. 3 is a state diagram of an air path when the compressed air supply facility 100 of the air suspension system 1000 is under high pressure protection, in which the air compression part 2 is a two-stage compression part, the two-stage compression part includes a first pressure stage 2.1 and a second pressure stage 2.2, the first pressure stage 2.1 is a low pressure stage of the two-stage compression part, the second pressure stage 2.2 is a high pressure stage of the two-stage compression part, an air outlet of the first pressure stage is connected with an air inlet of the second pressure stage, a third interface is connected with the air path between an air outlet of the high pressure stage and the drying part 3, a fourth interface is connected with the air path between an air inlet of the low pressure stage and the air port 1, and in case that the pre-control pressure at the third interface is greater than a high pressure protection threshold, the third interface is communicated with the fourth interface so that the gas discharged from the gas outlet of the high-pressure stage is discharged from the gas through hole 1, specifically, the pneumatic exhaust valve 13 starts the high-pressure protection function on the compressed air supply facility 100 during the closing period of the exhaust electromagnetic valve 12, the pre-control pressure PD is provided for the third interface B1 of the pneumatic exhaust valve 13 by the drying front path 21.2 between the high-pressure stage outlet and the inlet of the drying part 3, the first interface A1 and the second interface A2 of the pneumatic exhaust valve 13 are cut off by the compressed air supply facility 100 in the safety protection process, only the third interface B1 is communicated with the fourth interface B2, and the high-pressure air in the system can be directly discharged into the environment, so that the safety of the system is ensured, the high-pressure gas is prevented from entering the air spring module 300 or the air storage tank 9, and the safety of the system is protected.
In some embodiments, the first pressure stage 2.1 is connected to the inlet and outlet air path 20 through a first inlet and outlet branch air path 20.1, and the fourth interface B2 is connected to the inlet and outlet air path 20 through a second inlet and outlet branch air path 20.1.
In some embodiments, the air spring module 300 includes an air spring control assembly and an air storage tank 9, the air spring control assembly includes a pressure sensor 19, a plurality of air springs and an air spring valve, wherein the pressure sensor 19 is used for detecting pressure data and sending the pressure data to the controller, so that the controller controls the on-off of the air spring valve according to the pressure data, the air spring control assembly is connected with the air storage tank 9 through a first reversing electromagnetic valve 10, the first reversing electromagnetic valve 10 is used for controlling the in-out of air in the air storage tank 9, and in order to enable the compressed air of the air springs (15, 16, 17, 18) in the compressed air supply facility 100 to be discharged into the environment, and an air path where the air discharge electromagnetic valve 12 is located is connected with an air path where each air spring valve (5, 6, 7, 8) is located.
In some embodiments, the air compressing portion 2 is a two-stage compressing portion, the two-stage compressing portion includes a first pressure stage and a second pressure stage, the gas inlet is a gas inlet of the first pressure stage, the gas outlet is a gas outlet of the second pressure stage, the gas storage tank 9 is connected to the gas inlet of the first pressure stage through a second reversing electromagnetic valve 11, the second reversing electromagnetic valve 11 is used for controlling the gas in the gas storage tank 9 to flow to the first pressure stage and flow to the air spring module 300 after being compressed by the second pressure stage, wherein the gas storage tank 9 is connected to the gas inlet of the high pressure stage of the two-stage compressing portion through the second reversing electromagnetic valve 11, and the second reversing electromagnetic valve 11 is opened to enable the gas in the gas storage tank 9 to flow to the air spring module 300 sequentially through the high pressure stage, the drying portion 3 and the one-way valve 4.
The pneumatic exhaust valve 13 is further designed with a third pre-control chamber, which corresponds to the third interface B1 of the application, is communicated with the high-pressure outlet of the two-stage compression part, forms a pressure difference with the pressure of the first pre-control chamber, resists the force of the pre-compression spring, and can directly open the pneumatic exhaust valve 13 through the pressure difference when the exhaust pressure of the compression part is too high, so that the high-pressure protection of a suspension system is realized, namely, the compressed air with the pressure PD is obtained by the compressed air supply facility 100 in the working process of the two-stage compression part, and is sent to the B1 port of the pneumatic exhaust valve 13 through the drying front path 21.2 to be opened, at the moment, only the B1 port and the B2 port are conducted, and the A1 port and the A2 port are cut off, and the high-pressure air is discharged to the environment, so that the safety of the system is ensured.
Referring to fig. 4, fig. 4 is a cross-sectional view of a compressed air supply apparatus 100 according to another embodiment of the present invention, in which a pneumatic exhaust valve 13 is in a closed state, and the pneumatic exhaust valve 13 includes a pneumatic push rod 101, a low pressure limiting spring 102 and a high pressure limiting spring 103, the pneumatic push rod 101 is disposed between a first interface and a second interface, and the pneumatic push rod is disposed between a third interface and a fourth interface, and one end of the pneumatic push rod 101 is connected to the low pressure limiting spring 102 and the high pressure limiting spring 103, respectively.
Referring to fig. 5, fig. 5 is a sectional view of a compressed air supply apparatus 100 according to another embodiment of the present invention in a deflated state, wherein during the exhaustion process of the compressed air supply apparatus 100, the pressure of the air in the air spring module 300 acting on the pneumatic push rod 101 is greater than the pre-tightening force and the deforming force of the low pressure limiting spring 102 and the high pressure limiting spring 103 acting on the pneumatic push rod, respectively, so that the first interface communicates with the second interface, and the third interface communicates with the fourth interface, wherein fig. 5 corresponds to the exhaustion process in fig. 2.
In some embodiments, to achieve the deflation function of air suspension system 1000, the coordination of air spring valves 5,6,7,8 and exhaust solenoid valve 12, as well as pneumatic exhaust valve 13, is required. When the compressed gas in the air spring module 300 needs to be discharged, the corresponding air spring valve is opened, the exhaust electromagnetic valve 12 also needs to reach a conducting position, the compressed gas is sent to the A1 inlet of the pneumatic exhaust valve 13, the pressure of the compressed air in the air spring group is assumed to be PS, when the force of the PS acting on the lower surface of the pneumatic push rod is larger than the sum of the pretightening force and the deforming force of the low-pressure limiting spring and the high-pressure limiting spring, the pneumatic push rod is pushed upwards, the A1 inlet is conducted with the A2 inlet, the B1 inlet is conducted with the B2 inlet, the compressed gas is reduced to the ambient pressure through the throttle valve 14, the water vapor in the compressed gas is sucked through the drying part 3 and then flows to the B1 inlet of the pneumatic exhaust valve 13, and is discharged to the environment through the B2 inlet, and the exhaust function of the system is realized.
In some embodiments, when the pressure PS within the air spring module 300 is insufficient, the low pressure limiting spring cannot be pushed, which may ensure that the compressed air within the air spring module 300 is not completely exhausted, resulting in insufficient support force of the air spring module 300, damaging the piston within the air spring module 300. If the exhaust process is to be terminated, only the pneumatic exhaust valve 13 needs to be closed, and the compressed air in the air spring module 300 stops being input to the A1 port of the pneumatic exhaust valve 13, so that the pneumatic exhaust valve 13 can automatically close the residual gas between the A1 port and the exhaust electromagnetic valve 12 after being exhausted, and a certain residual pressure is reserved, thereby facilitating the rapid decompression and opening of the next exhaust.
Referring to fig. 6, fig. 6 is a sectional view of a compressed air supply apparatus 100 in a high-pressure protection state of a pneumatic exhaust valve 13 according to another embodiment of the present invention, where fig. 6 corresponds to the high-pressure protection process in fig. 3, in the process of inflating the compressed air supply apparatus 100, when the pressure of the air in the air compression bag acting on the pneumatic push rod through the third interface is greater than the deformation force of the high-pressure limiting spring 103 acting on the pneumatic push rod 101, the third interface is communicated with the fourth interface, so that the air suspension system 1000 has a certain self-safety protection capability, and when the exhaust pressure P2 generated by the air compression part 2 of the compressed air supply apparatus 100 is too high, the B1 port and the B2 port are opened by the B1 limiting spring 103 of the pneumatic exhaust valve 13, so that the high-pressure air is discharged into the environment, and the high-pressure air is prevented from entering the air spring module 300 or the air tank 9, thereby protecting the system.
Referring to fig. 7, fig. 7 is a flowchart of a control method of a compressed air supply apparatus 100 according to another embodiment of the present invention, the control method of the compressed air supply apparatus 100 according to the embodiment of the present invention is applied to the compressed air supply apparatus 100, the compressed air supply apparatus 100 includes a gas port 1 communicating with the surrounding environment, a pneumatic exhaust valve 13, an exhaust solenoid valve 12, and an air spring module 300, the air spring module 300 is connected with one end of the exhaust solenoid valve 12, the other end of the exhaust solenoid valve 12 is connected with a first interface of the pneumatic exhaust valve 13, a second interface and a third interface of the pneumatic exhaust valve 13 are connected, a fourth interface of the pneumatic exhaust valve 13 is connected with the gas port 1, and the method includes, but is not limited to, step S710.
And S710, controlling the communication of an exhaust electromagnetic valve to enable high-pressure gas in the air spring module to flow to the pneumatic exhaust valve so as to enable the first interface to be communicated with the second interface, and enabling the third interface to be communicated with the fourth interface, so that the high-pressure gas is exhausted from the gas through hole.
Referring to fig. 8, fig. 8 is a flowchart illustrating a method for controlling a compressed air supply apparatus 100 according to another embodiment of the present invention, in which a third port is connected to a fourth port, and the compressed air supply apparatus 100 further includes an air compressing unit 2, and the third port is connected to a gas outlet of the air compressing unit 2, and the method includes, but is not limited to, step S810.
In step S810, the air compressing unit is controlled to output high-pressure air through the air outlet, and when the pre-control pressure at the third interface of the air exhaust valve is greater than the pressure threshold, the third interface of the air exhaust valve is communicated with the fourth interface, so that the high-pressure air flows from the fourth interface to the air through hole and is exhausted.
In some embodiments, the pneumatic exhaust valve 13 is automatically opened according to the air pressure at the first interface or the third interface, without the need for a controller to control.
In some embodiments, the air spring module 300 includes an air spring control assembly, the air suspension system 1000 further includes an air reservoir 9, the air spring control and air spring control assembly being coupled to the air reservoir 9 via a first reversing solenoid valve 10, the method further including controlling the ingress and egress of air from the air reservoir via the first reversing solenoid valve.
Referring to fig. 9, fig. 9 is a flowchart illustrating a method for controlling a compressed air supply apparatus 100 according to another embodiment of the present invention, in which a second reversing solenoid valve 11 is connected, and an air compressing unit 2 is a two-stage compressing unit, wherein the two-stage compressing unit includes a first pressure stage and a second pressure stage, and an air tank 9 is connected to an air inlet of the first pressure stage through the second reversing solenoid valve 11, and the method includes, but is not limited to, step S910.
In step S910, the second reversing solenoid valve is controlled to be communicated, so that the gas in the gas storage tank flows to the second pressure stage, and flows to the air spring module after being compressed by the second pressure stage.
In some embodiments, the present application further provides an air suspension system 1000, where the air suspension system 1000 is provided with the compressed air supply apparatus 100 according to any one of the foregoing embodiments, so that the air suspension system 1000 has the functions and effects of the compressed air supply apparatus 100 according to any one of the foregoing embodiments.
In some embodiments, the air suspension system 1000 has a compressed air supply facility 100, an air tank 9 and air springs 15, 16, 17, 18, wherein the compressed air supply facility 100 is connected to the air tank 9 and the air springs 15, 16, 17, 18 through an air spring module 300, the air tank 9 is used for storing high-pressure air in the air spring module 300, and the air springs 15, 16, 17, 18 are used for adjusting the height of the vehicle to a predetermined height under the action of the high-pressure air in the air spring module 300, so as to improve the driving stability of the vehicle.
Fig. 10 is a schematic structural diagram of a controller according to an embodiment of the present invention.
Some embodiments of the present invention provide a controller including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the control method of the compressed air supply apparatus 100 of any of the above embodiments when executing the computer program, for example, performing the method step S710 in fig. 7, the method step S810 in fig. 8, and the method step S910 in fig. 9 described above.
The controller 1010 of the present embodiment includes one or more processors 1011 and memory 1012, with one processor 1011 and one memory 1012 being illustrated in fig. 10.
The processor 1011 and the memory 1012 may be connected by a bus or otherwise, for example in fig. 10.
Memory 1012, as a non-transitory computer-readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer-executable programs. In addition, memory 1012 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 1012 optionally includes memory 1012 remotely located from processor 1011, which may be connected to controller 1010 through a network, examples of which include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
In some embodiments, the processor, when executing the computer program, performs the method of controlling the compressed air supply 100 of any of the embodiments described above at preset intervals.
Those skilled in the art will appreciate that the device structure shown in fig. 10 is not limiting of the controller 1010 and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In the controller 1010 shown in fig. 10, the processor 1011 may be used to call a control program of the compressed air supply apparatus 100 stored in the memory 1012, thereby implementing a control method of the compressed air supply apparatus 100.
Based on the hardware configuration of the controller 1010 described above, various embodiments of the compressed air supply facility 100 of the present invention are presented, while non-transitory software programs and instructions required to implement the control method of the compressed air supply facility 100 of the above embodiments are stored in the memory, which when executed by the processor, perform the control method of the compressed air supply facility 100 of the above embodiments.
In addition, the embodiment of the present invention also provides a compressed air supply apparatus 100, and the compressed air supply apparatus 100 includes the controller described above.
In some embodiments, since the compressed air supply apparatus 100 of the embodiment of the present invention has the controller of the above embodiment, and the controller of the above embodiment is capable of executing the control method of the compressed air supply apparatus 100 of the above embodiment, the specific implementation and technical effects of the compressed air supply apparatus 100 of the embodiment of the present invention may refer to the specific implementation and technical effects of the control method of the compressed air supply apparatus 100 of any of the above embodiments.
The embodiment of the present invention also provides a computer-readable storage medium storing computer-executable instructions for performing the above-described control method of the compressed air supply facility 100, for example, the above-described one or more processors may be caused to perform the control method of the compressed air supply facility 100 in the above-described method embodiment, for example, perform the above-described method step S710 in fig. 7, the above-described method step S810 in fig. 8, and the above-described method step S910 in fig. 9.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer readable storage media (or non-transitory media) and communication media (or transitory media). The term computer-readable storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (11)
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| CN116733623B (en) * | 2023-06-12 | 2026-01-02 | 中国第一汽车股份有限公司 | Exhaust control methods for vehicle air suspension, vehicles and storage media |
| CN120207041A (en) * | 2023-12-26 | 2025-06-27 | 比亚迪股份有限公司 | Fluid control module, air suspension system and vehicle |
| CN118024810B (en) * | 2024-04-12 | 2024-07-02 | 河北昊方新能源科技有限公司 | Compressed air supply for air suspension systems |
| CN118494084A (en) * | 2024-06-20 | 2024-08-16 | 无锡博西特智能科技有限公司 | A vehicle compressed air supply system and operation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574645A (en) * | 2014-08-22 | 2017-04-19 | 威伯科有限公司 | Pneumatic circuit for passenger car pneumatic suspension system |
| CN111465520A (en) * | 2017-12-13 | 2020-07-28 | 威伯科有限公司 | Compressed air supply system, method and vehicle for operating a pneumatic system |
Family Cites Families (4)
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| DE10301119C5 (en) * | 2003-01-14 | 2018-04-05 | Wabco Gmbh | Air suspension system |
| DE102012006382A1 (en) * | 2012-03-30 | 2013-10-02 | Wabco Gmbh | Pressure medium supply system, pneumatic system and method for operating a pressure medium supply system |
| DE102013003513A1 (en) * | 2013-03-04 | 2014-09-04 | Wabco Gmbh | Compressor arrangement for operating a compressed air supply system, compressed air supply system and compressed air supply system and vehicle with such a compressed air supply system |
| CN215590423U (en) * | 2021-10-12 | 2022-01-21 | 广东美芝制冷设备有限公司 | Air suspension device and vehicle |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574645A (en) * | 2014-08-22 | 2017-04-19 | 威伯科有限公司 | Pneumatic circuit for passenger car pneumatic suspension system |
| CN111465520A (en) * | 2017-12-13 | 2020-07-28 | 威伯科有限公司 | Compressed air supply system, method and vehicle for operating a pneumatic system |
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