Air supply system and air supply method for air suspension

Abstract

Embodiments of the present application provide an air supply system and an air supply method for an air suspension. The air supply system for the air suspension includes an air tank, a plurality of air springs, an air supply valve unit, a dryer, a heating element, an electronic control unit, and a humidity sensor. The air tank is configured to store compressed air. The air springs are configured to input high-pressure air to each wheel of a vehicle. The air supply valve unit includes a reversing valve. The reversing valve is disposed on an air passage to switch the air supply system between a suction mode and a backflush mode by reversing the reversing valve. The cavity of the dryer is in communication with the air supply valve unit through the air passage. The heating element is disposed in the cavity of the dryer. The humidity sensor is disposed on the air passage and is in signal correspondence with the electronic control unit. Thus, the air supply system for the air suspension according to embodiments of the present application improves the regeneration efficiency of the dryer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an air supply system of an air suspension and an air supply method using the air supply system of the air suspension. BACKGROUND

[0002] As an important part of the active suspension system of the automobile, the air suspension is mainly composed of an air supply unit, an air spring, a damping device, a lateral stabilizer, a height valve, a guiding force transmission mechanism, an air tank and a pipeline. The air suspension can adjust the stiffness and damping of the suspension in real time according to the motion state of the automobile and the road condition, so that the suspension system is in the best damping state, and the vehicle has good comfort under various road conditions. Air is used as a medium to adjust the height and damping effect of the vehicle.

[0003] In order to ensure the normal operation of the system, the gas entering the air suspension needs to be dried. The dryer of the air suspension system will gradually saturate during continuous operation, resulting in a significant reduction in drying efficiency. In order to avoid system performance degradation and potential failures, for example, in cold environments, the moisture in the air may freeze in some parts of the air suspension system, causing ice blockage. When the temperature changes, the moisture in the air may condense or evaporate, which seriously affects the normal operation and long-term stability of the air suspension. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes an air supply system of an air suspension. The air supply system of the air suspension has the advantage of improving the regeneration efficiency of the dryer.

[0005] An embodiment of the present application also proposes an air control method of the air supply system of the air suspension.

[0006] The air supply system of the air suspension of the embodiment of the present application comprises an air tank, a plurality of air springs, a gas supply valve body unit, a dryer, a heating element, an electronic control unit and a humidity sensor.

[0007] The air tank is used to store compressed gas; the air spring is used to input high-pressure gas to each wheel of the vehicle; the gas supply valve body unit comprises a reversing valve; the reversing valve is arranged on the gas path channel so as to switch the air supply system between the air suction mode and the back blowing mode by reversing the reversing valve; the cavity of the dryer is in communication with the gas supply valve body unit through the gas path channel; the heating element is arranged in the cavity of the dryer; the humidity sensor is arranged on the gas path channel, and the humidity sensor is signal corresponding to the electronic control unit.

[0008] The air supply system of the air suspension of the embodiment of the present application has the air suction mode and the back blowing mode, and the humidity sensor is used to feed back to the electronic control unit to determine whether the heating element is turned on. When the heating element needs to be heated, the back blowing air flow effectively carries the water vapor in the dryer out to achieve the effect of regenerating the dryer. For example, the heating element can be a bent electric resistance wire, which is not only convenient to arrange, but also has the advantage of high heating efficiency.

[0009] The design can quickly and effectively remove the moisture in the gas, improve the drying efficiency, and reduce the working frequency of the motor, which is beneficial to protect the electronic elements. Furthermore, the air suspension stability is improved.

[0010] Therefore, the air supply system of the air suspension of the embodiment of the present application has the advantage of improving the regeneration efficiency of the dryer.

[0011] In some embodiments, the air supply valve body unit has a first air port, a second air port and a plurality of third air ports, the dryer is in communication with the first air port, the air tank is in communication with the second air port, and a plurality of the air springs are connected to the third air ports one by one.

[0012] In some embodiments, the air supply valve body unit includes a plurality of air supply valves, a plurality of reversing valves, a first air supply branch pipeline, a second air supply branch pipeline, a second air supply pipeline, a plurality of third air supply pipelines, a one-way valve, an exhaust valve and an air pump. The first air supply branch pipeline and the second air supply branch pipeline are connected in parallel between the first air port of the reversing valve and the dryer, the exhaust valve is arranged on the first air supply branch pipeline, the air pump and the one-way valve are arranged on the second air supply branch pipeline, the air tank is in communication with the second air port of the reversing valve through the second air supply pipeline, a plurality of the air springs are in communication with the third air ports of the plurality of reversing valves through a plurality of third air supply pipelines, and the air supply valves are arranged on the third air supply pipelines.

[0013] When the air supply system of the air suspension is in the air suction mode, the exhaust valve is closed, the reversing valve is switched to close a plurality of the third air ports, and the valve of the reversing valve is switched to make the first air port and the second air port conduct external air through the dryer to be dried and then sucked into the air tank after being pressurized by the air pump to complete the system air supply;

[0014] When the air supply system of the air suspension is in the anti-blowing mode, the exhaust valve and the heating element are opened, the reversing valve is switched to close the third air port, and the valve of the reversing valve is switched to open the first air port and the second air port, and the gas in the gas tank is heated by the heating element and discharged to the outside environment through the gas path of the air supply valve body unit.

[0015] In some embodiments, the air supply system of the air suspension also has a lifting mode and a lowering mode,

[0016] When the air supply system of the air suspension is in the air suspension lifting mode, the first air port is closed, the air supply valve group is switched, the second air port and the third air port are opened, and the gas in the gas tank is compressed into the air spring through the gas path of the air supply valve body unit, so that the air spring is lifted.

[0017] When the air supply system of the air suspension is in the air suspension lowering mode, the first air port is closed, the second air port and the third air port are opened, and the gas in the air spring is extracted into the gas tank through the gas path of the air supply valve body unit, so that the air spring is lowered.

[0018] In some embodiments, the air supply system of the air suspension also includes a temperature and pressure sensor, and the temperature and pressure sensor is arranged on the third air pipe.

[0019] In some embodiments, the air supply system of the air suspension also includes a temperature sensor arranged on the dryer, and the temperature sensor is in signal correspondence with the electronic control unit.

[0020] In some embodiments, the heating element is a bent electric resistance wire arranged in the dryer.

[0021] In some embodiments, the air supply system of the air suspension also includes an air filter, and in the air suction mode, the air filter is arranged upstream of the dryer.

[0022] The air control method of the air supply system of the air suspension of the embodiment of the present application includes the following steps:

[0023] (1) Humidity sensor detection: using a humidity sensor to detect the humidity level of the gas in the system or the gas tank;

[0024] (2) Humidity judgment: according to the data detected by the humidity sensor, it is judged whether the humidity of the inhaled gas exceeds the preset value, if the humidity exceeds the standard, the heating element is started; if the humidity does not exceed the standard, the heating element does not need to be started for drying treatment.

[0025] (3) Exhaust backflush: After heating the desiccant, switch the reversing valve to make the air supply system adjust to the backflush mode;

[0026] (4) Regeneration of the desiccant: The moisture in the desiccant is removed by the cooperation of heating and air backflush to restore the performance of the desiccant to achieve the circulation and regeneration of the desiccant.

[0027] In some embodiments, a temperature sensor is arranged in the desiccant, and the ECU as an electronic control unit receives and processes the humidity and temperature signals; the heating step of the desiccant is as follows:

[0028] (1) Receiving signals: the ECU receives the signals from the humidity sensor and the temperature sensor, such as the humidity of the desiccant has exceeded the preset value, and the current temperature signal T0 of the desiccant;

[0029] (2) Determining whether to heat: after receiving the T0 signal, the ECU determines whether T0 is less than the preset target temperature; if T0 is less than the target temperature, the ECU controls the heating element to start;

[0030] (3) Temperature monitoring: during the heating process, the ECU continuously monitors the temperature of the desiccant through the temperature sensor;

[0031] (4) Sending power-off instructions: when the temperature sensor detects that the temperature of the desiccant in the desiccant reaches the set value, the ECU controls the resistance wire to be powered off. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the air path diagram of the air intake mode of the air supply system of the air suspension of the embodiment of the present application.

[0033] Figure 2 is the air path diagram of the backflush mode of the air supply system of the air suspension of the embodiment of the present application.

[0034] Figure 3 is the principle schematic diagram of the backflush mode of the air supply system of the air suspension of the embodiment of the present application.

[0035] Figure 4 is the principle schematic diagram of the heating of the desiccant of the embodiment of the present application.

[0036] REFERENCE NUMERALS:

[0037] Air tank 1;

[0038] Air supply valve 2;

[0039] Air spring 3;

[0040] First reversing valve 4; second reversing valve 5; third reversing valve 6; fourth reversing valve 7;

[0041] humidity sensor 8; air pump 9; motor 10; exhaust valve 11; dryer 12; heating element 13; temperature sensor 14, temperature pressure sensor 15, air filter 16; one-way valve 17. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0043] Reference is made below Figures 1-4 The air supply system and air control method of the air suspension of the embodiments of the present application are described.

[0044] The air supply system of the air suspension of the embodiments of the present application comprises an air tank 1, a plurality of air springs 3, an air supply valve body unit, a dryer 12, a heating element 13, an electronic control unit and a humidity sensor 8.

[0045] The air tank 1 is used to store compressed air, and the plurality of air springs 3 are used to input high-pressure gas to each wheel of the vehicle; the air supply valve body unit comprises a reversing valve; the reversing valve is arranged on an air path channel so as to drive the air supply system to switch between the air suction mode and the back blowing mode by reversing of the reversing valve; the cavity of the dryer 12 is communicated with the air supply valve body unit through the air path channel; the heating element 13 is arranged in the cavity of the dryer 12; the humidity sensor 8 is arranged on the air path channel, and the humidity sensor 8 is signal corresponding with the electronic control unit.

[0046] The air supply system of the air suspension of the embodiments of the present application has the air suction mode and the back blowing mode, and determines whether the heating element 13 is turned on by using the humidity sensor 8 to feed back to the electronic control unit. When the heating element 13 needs to be heated, the back blowing air flow effectively carries out the water vapor in the dryer 12 to achieve the effect of regeneration of the dryer 12. For example, the heating element 13 can be a resistance wire arranged in a bending manner, which not only has a convenient layout, but also has the advantage of high heating efficiency.

[0047] The heating element 13 arranged can quickly and effectively remove the moisture in the gas, improve the drying efficiency. Compared with directly heating the hot desiccant by directly heating the gas by internal circulation, the working frequency of the motor 10 is reduced, which is beneficial to protect the electronic elements. Further, the problem of unstable or even failure of the air supply system caused by failure of the dryer 12 is prevented. Further, the stability of the air suspension is improved.

[0048] Therefore, the air supply system of the air suspension of the embodiments of the present application has the advantage of improving the regeneration efficiency of the dryer 12.

[0049] As Figure 1 andFigure 2 As shown in the drawings, the air supply valve body unit has a first air passage port, a second air passage port and a plurality of third air passage ports, the dryer 12 is connected to the first air passage port, the air tank 1 is connected to the second air passage port, and the plurality of air springs 3 are connected to the plurality of third air passage ports one by one.

[0050] The air supply system of the air suspension of the embodiment of the present application realizes the connection with the air tank 1 and the air spring 3 through the first air passage port, the second air passage port and the plurality of third air passage ports of the air supply valve body unit.

[0051] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the air supply valve body unit includes a plurality of air supply valves 2, a plurality of reversing valves, a first air passage branch line, a second air passage branch line, a second air passage line, a plurality of third air passage lines, a one-way valve 17, an exhaust valve 11 and an air pump 9, the first air passage branch line and the second air passage branch line are connected in parallel between the first air passage port of the reversing valve and the dryer 12, the exhaust valve 11 is arranged on the first air passage branch line, the air pump 9 and the one-way valve 17 are arranged on the second air passage branch line, the air tank 1 is connected to the second air passage port of the reversing valve through the second air passage line, the plurality of air springs 3 are connected to the third air passage ports of the plurality of reversing valves through the plurality of third air passage lines, and the air supply valve 2 is arranged on the third air passage line. The air pump 9 is driven by the motor 10, and the air inlet end of the air pump 9 is connected to the second air passage branch line of the reversing valve; the air supply valve 2 is mainly used for controlling the on-off of the air path connected to the air spring 3. Further, the plurality of air supply valves 2 can all be two-position two-way electromagnetic valves. The reversing valve is used for switching the flow direction of the overall air path of the air supply valve body unit.

[0052] When the air supply system of the air suspension is in the air suction mode, the exhaust valve 11 is closed, the reversing valve is switched to close the plurality of third air passage ports, and the valve of the reversing valve is switched to make the first air passage port and the second air passage port conduct external air to be sucked into the air tank 1 after being dried by the dryer 12 and pressurized by the air pump 9 to complete system air charging;

[0053] When the air supply system of the air suspension is in the anti-blowing mode, the exhaust valve 11 and the heating element 13 are opened, the reversing valve is switched to close the plurality of third air passage ports, and the valve of the reversing valve is switched to make the first air passage port and the second air passage port conduct, the gas in the plurality of air tanks 1 passes through the air path of the air supply valve body unit, and the gas in the air path is heated by the heating element 13 to dry the water vapor in the desiccant and discharge it to the external environment.

[0054] The air supply system of the air suspension of the embodiment of the present application, by arranging the air pump 9 and the one-way valve 17 on the second air passage branch line, the arrangement of the one-way valve 17 can prevent the reverse flow of the gas. The arrangement of the exhaust valve 11 can realize the cut-off and exhaust of the gas in cooperation with the switching of the anti-blowing mode and the air suction mode.

[0055] Specifically, the plurality of air supply valves 2 can include a first air supply valve, a second air supply valve, a third air supply valve, and a fourth air supply valve. That is, the number of air springs 3 is also four to correspond to the plurality of wheels of the vehicle. And the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve correspond one-to-one with the four air springs 3 respectively. One end of the first air supply valve, one end of the second air supply valve, one end of the third air supply valve, and one end of the fourth air supply valve are respectively in communication with the third air passage of the plurality of reversing valves. The other end of the first air supply valve, the other end of the second air supply valve, the other end of the third air supply valve, and the other end of the fourth air supply valve are respectively connected to one air spring. The plurality of reversing valves can include a first reversing valve 4, a second reversing valve 5, a third reversing valve 6, and a fourth reversing valve 7.

[0056] As shown in Figure 1 , the plurality of reversing valves include a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve. When the air suspension air supply system is in the air intake mode, the first reversing valve 4 and the one-way valve 17 are opened, and the second reversing valve 5 can also be powered on to open, and the state of the second reversing valve 5 is not limited here, the first air supply valve, the second air supply valve, the third air supply valve, the fourth air supply valve, and the exhaust valve 11 are closed. At this time, the air paths of the first reversing valve 4 and the one-way valve 17 are in the connected state, the air paths of the exhaust valve 11, the second reversing valve 5, and the third reversing valve 6 are in the disconnected state, and the motor 10 drives the air pump 9 to suck external air from the dryer 12, and after impurity filtering and drying by the dryer 12, the air is compressed into the air tank 1 through the air path of the air supply valve body unit, completing the system air supply.

[0057] As shown in Figure 2 , when the air suspension air supply system is in the backflushing mode, the first reversing valve 4 and the exhaust valve 11 are powered on, and the second reversing valve 5 can also be powered on, and the state of the second reversing valve 5 is not limited here, the first air supply valve, the second air supply valve, the third air supply valve, the fourth air supply valve, and the exhaust valve 11 are closed. Open the air tank 1, at this time, due to the internal air pressure being greater than the external air pressure, the air tank 1, the first air supply valve, the exhaust valve 11, and the dryer 12 are in air path communication, the air paths of the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are in the disconnected state, and the gas in the air tank 1 can pass through the air path of the air supply valve body unit and be discharged to the external environment through the dryer 12, and the gas in the dryer 12 is heated by the heating element 13, and the water vapor generated by heating is carried out by the backflushing gas.

[0058] When the air supply system of the air suspension is in the air suspension heightening state, the second reversing valve 5, the fourth reversing valve 7, the first air supply valve, the second air supply valve, the third air supply valve, the fourth air supply valve are powered on, the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are powered off, and the motor 10 is turned on, at this time, the air paths of the second reversing valve 5, the fourth reversing valve 7 and the air supply valve 2 group are in the connected state, the air paths of the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are in the disconnected state, the motor 10 drives the air pump 9 to compress the gas in the gas storage tank 1 to the four air springs 3 through the air paths of the first air supply valve, the second air supply valve, the third air supply valve and the fourth air supply valve, so that the air springs 3 are raised.

[0059] When the air supply system of the air suspension is in the air suspension heightening state, the second reversing valve 5, the fourth reversing valve 7, the first air supply valve, the second air supply valve, the third air supply valve, the fourth air supply valve are powered on, the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are powered off, and the motor 10 is turned on, at this time, the air paths of the second reversing valve 5, the fourth reversing valve 7 and the exhaust valve 11 are in the connected state, the air paths of the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are in the disconnected state, the motor 10 drives the air pump 9 to compress the gas in the gas storage tank 1 to the four air springs 3 through the air paths of the first air supply valve, the second air supply valve, the third air supply valve and the fourth air supply valve, so that the air springs 3 are raised.

[0060] As shown in Figure 1 and Figure 2 , the air supply system of the air suspension further comprises a temperature pressure sensor 15 arranged on the third air path. In order to monitor the pressure and temperature of the plurality of air springs 3, and give an early warning when an abnormality occurs, to ensure the safety of the overall system.

[0061] As shown in Figure 1 and Figure 2 , the air supply system of the air suspension further comprises a temperature sensor 14 arranged on the dryer 12, and the temperature sensor 14 is signal corresponding with the electronic control unit. The temperature of the drying agent is continuously monitored to ensure that the temperature is not too high or too low, so as to maintain the stability and efficiency of the heating process.

[0062] As shown in Figure 1 and Figure 2 , the air supply system of the air suspension further comprises an air filter 16, which is arranged upstream of the dryer 12 in the air suction mode.

[0063] As shown in Figure 1 , the air supply system of the air suspension of the embodiment of the present application can filter impurities in the gas by arranging the air filter 16, preventing impurities from adhering to the dryer 12 and the heating element 13.

[0064] The air control method of the air supply system of the air suspension of the embodiment of the present application comprises the following steps:

[0065] (1) Humidity sensor 8 detection: using humidity sensor 8 to detect the humidity level of the gas in the system or gas tank 1;

[0066] (2) Humidity judgment: according to the data detected by humidity sensor 8, judge whether the humidity of the inhaled gas exceeds the preset value; if the humidity does not exceed the standard, the drying process step does not need to be started;

[0067] (3) Exhaust backflushing: if the humidity exceeds the standard, start the heating element 13, after heating the drying agent, switch the reversing valve to make the air supply system adjust to the backflushing mode, the purpose of this step is to further remove the residual moisture and impurities by blowing dry gas into the system or gas tank 1, to ensure the dryness of the entering gas;

[0068] (4) Drying agent regeneration: the moisture in the drying agent 12 will be removed under the synergistic action of heating and gas backflushing to restore the performance of the drying agent 12 to realize the circulation and regeneration of the drying agent. This process may include continuing to heat the drying agent to remove the water adsorbed by it, and restoring the performance of the drying agent 12 through specific operations so that it can effectively perform drying again. After the regeneration of the drying agent 12 is completed, the system will start the cycle again, starting from the gas absorption of the gas tank 1, repeating the whole process. When the system detects that the humidity of the gas reaches a stable state or meets certain conditions, it will be judged as "regeneration end", at this time the whole control process is also completed.

[0069] Therefore, the air control method of the air supply system of the air suspension of the embodiment of the present application has the advantage of improving the regeneration efficiency of the drying agent 12.

[0070] As shown in Figure 2 Figure 3 Figure 4 The air control method of the air supply system of the air suspension of the embodiment of the present application further comprises a temperature sensor 14, which is arranged in the drying agent 12 and relies on the ECU as an electronic control unit to accept and process humidity and temperature signals; the heating step of the drying agent 12 is as follows:

[0071] (1) Signal receiving: the ECU receives the signals output by the humidity sensor 8 and the temperature sensor 14, such as the humidity of the drying agent exceeding the preset value and the current temperature signal T0 of the drying agent; T0 is the temperature value expected to be reached during the heating process to ensure that the drying agent can effectively remove moisture;

[0072] (2) Heating judgment: after receiving the T0 signal, the ECU judges whether T0 is less than the preset target temperature; if T0 is less than the target temperature, the ECU controls the heating element 13 to start;

[0073] (3) Temperature monitoring: During the heating process, the ECU continuously monitors the temperature of the desiccant through the temperature sensor 14;

[0074] (4) Sending power-off command: When the temperature sensor 14 detects that the temperature of the desiccant in the desiccant dryer 12 reaches the set value, the ECU sends a power-off command for the resistance wire. This command tells the system to stop the heating process because the desiccant has reached the required temperature and removed enough moisture at this time.

[0075] Heating desiccant ends: After the resistance wire is powered off, the process of heating the desiccant ends. At this time, the desiccant in the air suspension has recovered its proper dry state and can continue to effectively remove moisture from the air.

[0076] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0077] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0078] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0080] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for different elements, regions, layers, or sections, and are not intended to denote a spatial or chronological priority or order except if explicitly so defined. Also, the terms "comprises", "comprising", "includes", "including", or the like are used herein to generally mean comprising, including, or consisting of, unless otherwise indicated.

[0081] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present application, and that changes, modifications, substitutions and variations can be made therein by those skilled in the art without departing from the scope of the present application.

Claims

1. An air supply system for an air suspension, characterized in that The air supply system has an air suction mode and a back blowing mode; The air supply system comprises: An air tank for storing compressed air; A plurality of air springs for inputting high-pressure gas to each wheel of a vehicle; An air supply valve body unit comprising a reversing valve; the reversing valve is arranged on an air path channel so that the switching of the reversing valve drives the air supply system to switch between the air suction mode and the back blowing mode; A dryer, the cavity of which is communicated with the air supply valve body unit through an air path channel; A heating element arranged in the cavity of the dryer; An electronic control unit and a humidity sensor arranged on the air path channel, the humidity sensor being in signal correspondence with the electronic control unit; The air supply valve body unit has a first air passage port, a second air passage port and a plurality of third air passage ports, the dryer is communicated with the first air passage port, the air tank is communicated with the second air passage port, and a plurality of the air springs are connected with a plurality of the third air passage ports one by one; Comprising the following steps: The air supply valve body unit comprises a plurality of air supply valves, a plurality of reversing valves, a first air passage branch pipeline, a second air passage branch pipeline, a second air passage pipeline, a plurality of third air passage pipelines, a one-way valve, an exhaust valve and an air pump, the first air passage branch pipeline and the second air passage branch pipeline are connected in parallel between the first air passage port of the reversing valve and the dryer, the exhaust valve is arranged on the first air passage branch pipeline, the air pump and the one-way valve are arranged on the second air passage branch pipeline, the air tank is communicated with the second air passage port of the reversing valve through the second air passage pipeline, a plurality of the air springs are communicated with the third air passage ports of the plurality of reversing valves through a plurality of third air passage pipelines, and the air supply valves are arranged on the third air passage pipelines; When the air supply system of the air suspension is in the air suction mode, the exhaust valve is closed, the reversing valve is switched to make a plurality of the third air passage ports closed, and the valve switching of the reversing valve is performed to make the first air passage port and the second air passage port conductive, external air is sucked into the air tank after being dried by the dryer and pressurized by the air pump, and the system is completed to be recharged; When the air supply system of the air suspension is in the back blowing mode, the exhaust valve and the heating element are opened, the reversing valve is switched to make a plurality of the third air passage ports closed, and the valve switching of the reversing valve is performed to make the first air passage port and the second air passage port conductive, a plurality of gases in the air tank are heated by the heating element through the air path of the air supply valve body unit, and the water vapor in the dryer is discharged to the external environment.

2. The air suspension air supply system according to claim 1, characterized in that The air supply system of the air suspension also has a lifting mode and a lowering mode, When the air supply system of the air suspension is in the air suspension lifting mode, the first air passage port is closed, the air supply valve group is switched, the second air passage port and a plurality of the third air passage ports are made conductive, and the gas in the air tank is compressed through the air path of the air supply valve body unit into a plurality of the air springs, so that the air springs are lifted. When the air supply system of the air suspension is in the air suspension lowering mode, the first air vent port is closed, the second air vent port and the plurality of third air vent ports are opened, and the gas in the plurality of air springs is drawn into the gas tank through the air path of the air supply valve body unit, so as to lower the air springs.

3. The air suspension air supply system of claim 1, wherein, The air supply system of the air suspension further comprises a temperature pressure sensor arranged on the third air vent pipeline.

4. The air suspension air supply system of claim 1, wherein, Further comprising a temperature sensor arranged on the dryer, and the temperature sensor is in signal correspondence with the electronic control unit.

5. The air suspension air supply system of claim 1, wherein, The heating element is a bently arranged electric resistance wire arranged in the dryer.

6. The air suspension air supply system of claim 1, wherein, The air supply system of the air suspension further comprises an air filter arranged upstream of the dryer in the air suction mode.

7. A method of air control of a gas supply system of an air suspension, characterized in that The air supply system of the air suspension as claimed in any one of claims 1-6, the air control method of the air supply system comprises: (1) humidity sensor detection: using a humidity sensor to detect the humidity level of the gas in the system or the gas tank; (2) humidity over-limit judgment: judging whether the humidity of the inhaled gas exceeds the preset value through the humidity sensor; if the humidity does not exceed the limit, the heating element does not need to be started for drying treatment; (3) exhaust back flushing: if the humidity exceeds the limit, the heating element is started, and after the drying agent is heated, the reversing valve is switched to adjust the air supply system to the back flushing mode; (4) dryer regeneration: the moisture in the dryer is removed under the synergistic action of heating and gas back flushing, so as to realize the circulation and regeneration of the drying agent.

8. The air suspension system of claim 7, wherein, Further comprising a temperature sensor arranged in the dryer, and the temperature sensor receives and processes the humidity and temperature signals by relying on the ECU as an electronic control unit; the drying treatment steps of the dryer are as follows: (1) receiving signals: the ECU receives the signals output by the humidity sensor and the temperature sensor, such as when the humidity of the drying agent has exceeded the preset value and the current temperature signal T0 of the drying agent; (2) judging whether to heat: after receiving the T0 signal, the ECU judges whether T0 is less than the preset target temperature; if T0 is less than the target temperature, the ECU controls the heating element to start; (3) temperature monitoring: during the heating process, the ECU continuously monitors the temperature of the drying agent through the temperature sensor; (4) sending power-off instructions: when the temperature sensor detects that the temperature of the drying agent in the dryer reaches the set value, the ECU controls the electric resistance wire to be powered off.

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