Air supply system and air supply method of air suspension

Abstract

The embodiment of the invention provides an air supply system and an air supply method of an air suspension. The air supply system of the air suspension comprises an air storage tank, a plurality of air springs, an air supply valve body unit, a dryer, a heating element, an electronic control unit and a humidity sensor. The air storage tank is used for storing compressed air; the air spring is used for inputting 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 channel, so that the air supply system is driven to be switched between the air suction mode and the reverse blowing mode through reversing of the reversing valve; the cavity of the dryer is communicated with the air supply valve body unit through an air channel; the heating element is arranged in a cavity of the dryer, the humidity sensor is arranged on the air channel, and the humidity sensor corresponds to the electronic control unit in a signal mode. Therefore, the air supply system of the air suspension has the advantage that the regeneration efficiency of the dryer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and 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 Art

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

[0003] 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 become saturated during continuous operation, resulting in a significant reduction in drying efficiency. To avoid system performance degradation and potential failures, for example, in a cold environment, the moisture in the air may freeze in certain parts of the air suspension system, forming ice blockage. When the temperature of air with excessive humidity changes, the moisture in it may condense or evaporate, seriously affecting the normal operation and long-term stability of the air suspension. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention provides an air supply system for an air suspension. The air supply system for an air suspension has the advantage of improving the regeneration efficiency of a dryer.

[0005] An embodiment of the present invention further provides an air control method for an air supply system of an air suspension.

[0006] The air supply system of the air suspension according to the embodiment of the present invention includes an air storage tank, a plurality of air springs, an air supply valve unit, a dryer, a heating element, an electronic control unit and a humidity sensor.

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

[0008] The air supply system of the air suspension of the embodiment of the present invention enables the air supply system to have an air intake mode and a back-blowing mode, and uses a humidity sensor 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 airflow is relied on to effectively carry out the water vapor in the dryer to achieve the effect of regenerating the dryer. For example, the heating element can be a resistance wire that is bent and arranged, which is not only convenient to lay, but also has the advantage of high heating efficiency.

[0009] This design can quickly and effectively remove moisture from the gas and improve drying efficiency. Compared with directly using the internal circulation heating gas to directly heat and dry the hot desiccant, it reduces the operating frequency of the motor and is beneficial to protecting electronic components. It can also prevent the problem of unstable or even failure of the air supply system caused by the failure of the dryer, thereby improving the stability of the air suspension.

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

[0011] In some embodiments, the air supply valve body unit has a first ventilation port, a second ventilation port and multiple third ventilation ports, the dryer is connected to the first ventilation port, the air storage tank is connected to the second ventilation port, and the multiple air springs are connected to the multiple third ventilation ports one by one.

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

[0013] When the air supply system of the air suspension is in the air intake mode, the exhaust valve is closed, the reversing valve is switched to close the plurality of third ventilation ports, and the valve of the reversing valve is switched to allow the first ventilation port and the second ventilation port to conduct external air to be dried by the dryer and pressurized by the air pump and then sucked into the air storage tank to complete the system air replenishment;

[0014] 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 close the plurality of third ventilation ports, and the valve of the reversing valve is switched to connect the first ventilation port and the second ventilation port, and the gas in the plurality of air storage tanks is heated by the heating element through the air path of the air supply valve body unit to discharge the water vapor in the desiccant into the external environment.

[0015] In some embodiments, the air supply system of the air suspension further has a raising mode and a lowering mode.

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

[0017] When the air supply system of the air suspension is in the air suspension descent mode, the first ventilation port is closed, the second ventilation port and the multiple third ventilation ports are connected, and the gas in the multiple air springs is drawn into the air tank through the air path of the air supply valve body unit, so that the air springs are lowered.

[0018] In some embodiments, the air supply system of the air suspension further includes a temperature and pressure sensor, and the temperature and pressure sensor is disposed on the third ventilation line.

[0019] In some embodiments, the air supply system of the air suspension further includes a temperature sensor, which is disposed on the dryer and responds to a signal from the electronic control unit.

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

[0021] In some embodiments, the air supply system of the air suspension further includes an air filter, and in the air intake mode, the air filter is disposed upstream of the dryer.

[0022] The air control method of the air supply system of the air suspension according to the embodiment of the present invention comprises the following steps:

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

[0024] (2) Determine whether the humidity exceeds the standard: Based on the data detected by the humidity sensor, determine whether the humidity of the inhaled gas exceeds the preset value. If the humidity exceeds the standard, start the heating element; if the humidity does not exceed the standard, there is no need to start the heating element to perform the drying process;

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

[0026] (4) Dryer regeneration: The moisture in the dryer will be removed by the synergistic effect of heating and gas backflushing to restore the performance of the dryer to achieve the circulation and regeneration of the desiccant.

[0027] In some embodiments, a temperature sensor is provided in the dryer, and an ECU is used as an electronic control unit to receive and process humidity and temperature signals; the heating steps of the dryer are as follows:

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

[0029] (2) Determine whether to heat or not: 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 a power-off command: When the temperature sensor detects that the temperature of the desiccant in the dryer reaches a set value, the ECU controls the resistor to power off. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 1 is a gas circuit diagram of an air intake mode of an air supply system of an air suspension according to an embodiment of the present invention.

[0033] Figure 2 1 is an air path diagram of a back-blowing mode of an air supply system of an air suspension according to an embodiment of the present invention.

[0034] Figure 3 1 is a schematic diagram of the principle of the backflush mode of the air supply system of the air suspension according to the embodiment of the present invention.

[0035] Figure 4 Schematic diagram of the heating principle of the dryer according to the embodiment of the present invention.

[0036] Reference numerals:

[0037] Gas tank 1;

[0038] Air supply valve 2;

[0039] Air spring 3;

[0040] The first reversing valve 4; the second reversing valve 5; the third reversing valve 6; the 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 and pressure sensor 15, air filter 16; one-way valve 17. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] Reference below Figure 1-Figure 4 An air supply system and an air control method of an air suspension according to an embodiment of the present invention are described.

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

[0045] The air storage 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 includes a reversing valve; the reversing valve is arranged on the air path so as to drive the air supply system to switch between the suction mode and the back-blowing mode by reversing the reversing valve, and the cavity of the dryer 12 is connected to the air supply valve body unit through the air path; the heating element 13 is arranged in the cavity of the dryer 12; the humidity sensor 8 is arranged on the air path, and the humidity sensor 8 responds to the signal of the electronic control unit.

[0046] The air supply system of the air suspension of the embodiment of the present invention enables the air supply system to have an air intake mode and a back-blowing mode, and uses the humidity sensor 8 to feed back to the electronic control unit to determine whether the heating element 13 is turned on. When the heating element 13 needs to be heated, the back-blowing airflow is relied on to effectively carry out the water vapor in the dryer 12 to achieve the effect of regenerating the dryer 12. For example, the heating element 13 can be a resistance wire that is bent and arranged, which is not only convenient to lay, but also has the advantage of high heating efficiency.

[0047] The heating element 13 can quickly and effectively remove moisture from the gas, thereby improving the drying efficiency. Compared with directly using the internal circulation heating gas to directly heat and dry the hot desiccant, the operating frequency of the motor 10 is reduced, which is beneficial to protecting the electronic components. Furthermore, the problem of unstable or even failure of the air supply system caused by the failure of the dryer 12 is prevented, thereby improving the stability of the air suspension.

[0048] Therefore, the air supply system of the air suspension according to the embodiment of the present invention has the advantage of improving the regeneration efficiency of the dryer 12 .

[0049] like Figure 1 and Figure 2 As shown, the air supply valve body unit has a first ventilation port, a second ventilation port and multiple third ventilation ports, the dryer 12 is connected to the first ventilation port, the air storage tank 1 is connected to the second ventilation port, and the multiple air springs 3 are connected to the multiple third ventilation ports one by one.

[0050] The air supply system of the air suspension according to the embodiment of the present invention is connected with the air tank 1 and the air spring 3 through the first air vent port, the second air vent port and a plurality of third air vent ports of the air supply valve body unit.

[0051] like Figure 1 and Figure 2 As shown, the air supply valve body unit includes multiple air supply valves 2, multiple reversing valves, a first ventilation branch pipeline, a second ventilation branch pipeline, a second ventilation pipeline, multiple third ventilation pipelines, a one-way valve 17, an exhaust valve 11 and an air pump 9. The first ventilation branch pipeline and the second ventilation branch pipeline are connected in parallel between the first ventilation port of the reversing valve and the dryer 12. The exhaust valve 11 is arranged on the first ventilation branch pipeline, the air pump 9 and the one-way valve 17 are arranged on the second ventilation branch pipeline, the air storage tank 1 is connected to the second ventilation port of the reversing valve through the second ventilation pipeline, and the multiple air springs 3 are connected to the third ventilation of the multiple reversing valves through multiple third ventilation pipeline ports. The air supply valve 2 is arranged in the third ventilation pipeline. The air pump 9 is driven by a motor 10, and the air inlet end of the air pump 9 is connected to the second ventilation branch pipeline of the reversing valve; the air supply valve 2 is mainly used to control the on-off of the air path connected to the air spring 3. Further, the multiple air supply valves 2 can all be two-position two-way solenoid valves. The reversing valve is used to switch the flow direction of the entire gas path of the gas supply valve body unit.

[0052] When the air supply system of the air suspension is in the air intake mode, the exhaust valve 11 is closed, the reversing valve is switched to close the third ventilation ports, and the valve of the reversing valve is switched to allow the first ventilation port and the second ventilation port to conduct the external air through the dryer 12 to dry and the air pump 9 to pressurize the air and then suck it into the air storage tank 1 to complete the system air replenishment;

[0053] When the air supply system of the air suspension is in the back-blowing mode, the exhaust valve 11 and the heating element 13 are opened, the reversing valve is switched to close the multiple third ventilation ports, and the valve of the reversing valve is switched to connect the first ventilation port and the second ventilation port. The gas in the multiple air storage tanks 1 passes through the air path of the air supply valve body unit, and the gas in the air path is discharged to the external environment by heating the water vapor in the desiccant through the heating element 13.

[0054] The air supply system of the air suspension of the embodiment of the present invention can prevent the reverse flow of gas by arranging the air pump 9 and the one-way valve 17 on the second ventilation branch pipe. The arrangement of the one-way valve 17 can cooperate with the switching of the back-blowing mode and the suction mode to realize the cut-off and exhaust of gas.

[0055] Specifically, the plurality of air supply valves 2 may 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 to the four air springs 3 one by one, 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 connected to the third ventilation 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 an air spring. The plurality of reversing valves may include a first reversing valve 4, a second reversing valve 5, a third reversing valve 6 and a fourth reversing valve 7.

[0056] like Figure 1 As shown, the multiple reversing valves include a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve. When the air supply system of the air suspension 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 and opened. The state of the second reversing valve 5 is not limited here, and 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 circuits of the first reversing valve 4 and the one-way valve 17 are all in the connected state, and the air circuits of the exhaust valve 11, the second reversing valve 5, and the third reversing valve 6 are all in the disconnected state. The motor 10 drives the air pump 9 to inhale the external air from the dryer 12, and after the impurities are filtered and dried by the dryer 12, the air is compressed into the air storage tank 1 through the air circuit of the air supply valve body unit to complete the system air replenishment.

[0057] like Figure 2 As shown, when the air supply system of the air suspension is in the back-blowing mode, the first reversing valve 4 and the exhaust valve 11 are powered on and opened, and the second reversing valve 5 can also be powered on and opened. The state of the second reversing valve 5 is not limited here, and 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. The air storage tank 1 is opened. At this time, since the internal air pressure of the system is greater than the external air pressure, the air paths of the air storage tank 1, the first air supply valve, the exhaust valve 11 and the dryer 12 are connected, and 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 all in a disconnected state. The gas in the air storage 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 heating element 13 heats the gas in the dryer 12, and the heated water vapor is taken out by the back-blown gas.

[0058] When the air supply system of the air suspension is in the air-suspended raised 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, and the fourth air supply valve are powered on and opened, the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are powered off and closed, and the motor 10 is turned on. At this time, the air circuits of the second reversing valve 5, the fourth reversing valve 7 and the air supply valve group 2 are all in the connected state, and the air circuits of the first reversing valve 4, the third reversing valve 6 and the exhaust valve 11 are all in the disconnected state. The motor 10 drives the air pump 9 to compress the gas in the air tank 1 into the four air springs 3 through the air circuits of the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve, respectively, to raise the air spring 3.

[0059] When the air supply system of the air suspension is in the air suspension descent mode, the first reversing valve 4, the third reversing valve 6, the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are powered on and opened, the second reversing valve 5, the fourth reversing valve 7 and the exhaust valve 11 are powered off and closed, and the motor 10 is turned on. At this time, the air circuits of the first reversing valve 4, the third reversing valve 6, the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are all in a connected state, and the air circuits of the second reversing valve 5, the fourth reversing valve 7 and the exhaust valve 11 are all in a disconnected state. The motor 10 drives the air pump 9 to compress the gas in the multiple air springs 3 through the air circuit of the air supply valve body unit and recover it to the air storage tank 1, so that the air springs 3 are lowered.

[0060] like Figure 1 and Figure 2 As shown, the air supply system of the air suspension also includes a temperature and pressure sensor 15, which is arranged on the third ventilation pipeline to monitor the pressure and temperature of the multiple air springs 3, so as to give an early warning when an abnormality occurs, thereby ensuring the safety of the overall use of the system.

[0061] like Figure 1 and Figure 2 As shown, the air supply system of the air suspension further includes a temperature sensor 14, which is disposed on the dryer 12 and corresponds to the signal of the electronic control unit to continuously monitor the temperature of the desiccant to ensure that the temperature is not too high or too low, thereby maintaining the stability and efficiency of the heating process.

[0062] like Figure 1 and Figure 2 As shown, the air supply system of the air suspension further includes an air filter 16 . In the air intake mode, the air filter 16 is arranged upstream of the dryer 12 .

[0063] like Figure 3 As shown, the air supply system of the air suspension of the embodiment of the present invention can filter impurities in the gas by setting an air filter 16 to prevent the impurities from adhering to the dryer 12 and the heating element 13 and affecting them.

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

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

[0066] (2) Determining whether the humidity exceeds the standard: judging whether the humidity of the inhaled gas exceeds the preset value according to the data detected by the humidity sensor 8; if the humidity does not exceed the standard, there is no need to start the drying process;

[0067] (3) Exhaust back-blowing: If the humidity exceeds the standard, the heating element 13 is started. After heating the desiccant, the reversing valve is switched to adjust the gas supply system to the back-blowing mode. The purpose of this step is to further remove residual moisture and impurities by blowing dry gas into the system or gas tank 1 to ensure the dryness of the incoming gas;

[0068] (4) Desiccant regeneration: The moisture in the dryer 12 will be removed under the synergistic effect of heating and gas backflushing to restore the performance of the dryer 12 to achieve the circulation and regeneration of the desiccant. This process may include continuing to heat the desiccant to remove the adsorbed moisture, and restoring the performance of the dryer 12 through specific operations so that it can effectively perform drying again. After the regeneration of the dryer 12 is completed, the system will start the cycle again and repeat the entire process starting from the suction of the gas tank 1. When the system detects that the humidity of the gas has reached a stable state or meets specific conditions, it will be judged as "regeneration end", and the entire control process is completed at this time.

[0069] Therefore, the air control method of the air supply system of the air suspension according to the embodiment of the present invention has the advantage of improving the regeneration efficiency of the dryer 12 .

[0070] like Figure 4 As shown, the air control method of the air supply system of the air suspension of the embodiment of the present invention further includes a temperature sensor 14, the temperature sensor 14 is provided with a dryer 12, and the ECU is used as an electronic control unit to receive and process humidity and temperature signals; the heating steps of the dryer 12 are as follows:

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

[0072] (2) Determining whether to heat: After receiving the T0 signal, the ECU determines whether T0 is less than a 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 a power-off command: When the temperature sensor 14 detects that the temperature of the desiccant in the dryer 12 reaches the set value, the ECU will send a resistor wire power-off command. This command tells the system to stop the heating process because the desiccant has reached the required temperature and has removed enough moisture.

[0075] End of heating desiccant: After the resistor wire is powered off, the process of heating desiccant ends. At this point, the desiccant in the air has returned to its proper dry state and can continue to effectively remove moisture from the air.

[0076] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

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 gas supply system comprises: A gas storage tank, wherein the gas storage tank is used to store compressed gas; A plurality of air springs, the air springs being used to input high pressure gas to each wheel of the vehicle; An air supply valve body unit, the air supply valve body unit comprising a reversing valve; the reversing valve is arranged on the air path so as to drive the air supply system to switch between the suction mode and the back-blowing mode by reversing the reversing valve; A dryer, the cavity of which is in communication with the air supply valve unit via an air passage; A heating element, the heating element being disposed in the cavity of the dryer; An electronic control unit and a humidity sensor, wherein the humidity sensor is arranged on the air path, and the humidity sensor responds to a signal of the electronic control unit.

2. The air supply system of the air suspension according to claim 1, characterized in that: The air supply valve body unit has a first ventilation port, a second ventilation port and multiple third ventilation ports. The dryer is connected to the first ventilation port, the air storage tank is connected to the second ventilation port, and the multiple air springs are connected to the multiple third ventilation ports in a one-to-one correspondence.

3. The air supply system of the air suspension according to claim 2, characterized in that: The steps include: The air supply valve body unit comprises a plurality of air supply valves, a plurality of reversing valves, a first ventilation branch line, a second ventilation branch line, a second ventilation pipeline, a plurality of third ventilation pipelines, a one-way valve, an exhaust valve and an air pump, wherein the first ventilation branch line and the second ventilation branch line are connected in parallel between the first ventilation port of the reversing valve and the dryer, the exhaust valve is arranged on the first ventilation branch line, the air pump and the one-way valve are arranged on the second ventilation branch line, the air storage tank is communicated with the second ventilation port of the reversing valve through the second ventilation pipeline, the plurality of air springs are communicated with the third ventilation ports of the plurality of reversing valves through the plurality of third ventilation pipelines, and the air supply valve is arranged on the third ventilation pipeline; When the air supply system of the air suspension is in the air intake mode, the exhaust valve is closed, the reversing valve is switched to close the plurality of third ventilation ports, and the valve of the reversing valve is switched to connect the first ventilation port and the second ventilation port, and the external air is dried by the dryer and pressurized by the air pump and then sucked into the air storage tank to complete the air replenishment of the system; 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 close the plurality of third ventilation ports, and the valve of the reversing valve is switched to connect the first ventilation port and the second ventilation port, and the gas in the plurality of air storage tanks is heated by the heating element through the air path of the air supply valve body unit to discharge the water vapor in the desiccant into the external environment.

4. The air supply system of the air suspension according to claim 3, characterized in that: The air supply system of the air suspension also has a raising mode and a lowering mode. When the air supply system of the air suspension is in an air suspension raising mode, the first ventilation port is closed, the air supply valve group is switched, the second ventilation port and the plurality of third ventilation ports are connected, and the gas in the air storage tank is compressed into the plurality of air springs through the air path of the air supply valve body unit, so that the air springs are raised; When the air supply system of the air suspension is in the air suspension descent mode, the first ventilation port is closed, the second ventilation port and the plurality of third ventilation ports are connected, and the gas in the plurality of air springs is drawn into the air storage tank through the air path of the air supply valve body unit, thereby lowering the air spring.

5. The air supply system of the air suspension according to claim 3, characterized in that: The air supply system of the air suspension further includes a temperature and pressure sensor, and the temperature and pressure sensor is arranged on the third ventilation pipeline.

6. The air supply system of the air suspension according to claim 1, characterized in that: A temperature sensor is also included. The temperature sensor is arranged on the dryer, and the temperature sensor responds to a signal of the electronic control unit.

7. The air supply system of the air suspension according to claim 1, characterized in that: The heating element is a resistance wire arranged in a bent manner in the dryer.

8. The air supply system of the air suspension according to claim 1, characterized in that: The air supply system of the air suspension further includes an air filter, and in the air intake mode, the air filter is disposed upstream of the dryer.

9. An air control method for an air supply system of an air suspension, characterized in that: (1) Humidity sensor detection: Use humidity sensors to detect the humidity level of the gas in the system or gas tank; (2) Determine whether the humidity exceeds the standard: The humidity sensor is used to determine whether the humidity of the inhaled gas exceeds the preset value; if the humidity does not exceed the standard, there is no need to start the heating element to perform the drying process; (3) Exhaust backflush: If the humidity exceeds the standard, start the heating element, and after heating the desiccant, switch the reversing valve to adjust the air supply system to the backflush mode; (4) Dryer regeneration: The moisture in the dryer will be removed by the synergistic effect of heating and gas backflushing to achieve the circulation and regeneration of the desiccant.

10. The air control method of the air supply system of the air suspension according to claim 9, characterized in that: It also includes a temperature sensor, which is arranged in the dryer and relies on the ECU as an electronic control unit to receive and process humidity and temperature signals; the drying process steps of the dryer are as follows: (1) Receiving signals: The ECU receives signals from the humidity sensor and the temperature sensor, such as the desiccant humidity has exceeded the preset value and the current desiccant temperature signal T0; (2) Determine whether to heat or not: 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; (3) Temperature monitoring: During the heating process, the ECU continuously monitors the temperature of the desiccant through the temperature sensor; (4) Sending a power-off command: When the temperature sensor detects that the temperature of the desiccant in the dryer reaches a set value, the ECU controls the resistor to power off.

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