Air supply system and air supply method for air suspension with multiple operating modes

Abstract

The embodiment of the present application provides a gas supply system and a gas supply method of an air suspension with multiple working modes. The gas supply system comprises a gas tank, multiple air springs, a gas supply valve group, a temperature and pressure sensor, a vacuum suction valve pipeline, an air inlet valve pipeline and a negative pressure pipeline. The gas supply valve group has a first air inlet port, a second air inlet port and multiple third air inlet ports. The second air inlet port is communicated with the gas tank, and the multiple third air inlet ports are communicated with the multiple air springs one by one. The vacuum suction valve pipeline comprises a vacuum generator, and the air inlet valve pipeline comprises a dryer. The first air inlet port of the gas supply valve group is communicated with the outside through the parallelly arranged vacuum suction valve pipeline and air inlet valve pipeline, and the vacuum generator and the dryer are selectively communicated through the negative pressure pipeline. Therefore, the gas supply system has the advantages of reducing the drying agent regeneration temperature and prolonging the service life of the electric element.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a gas supply system of an air suspension with multiple working modes and a gas supply method using the same. BACKGROUND

[0002] As an important part of the active suspension system of an 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, and 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 to improve the comfort of the vehicle in various road conditions.

[0003] The dryer of the air suspension system will gradually saturate during continuous operation, resulting in a significant reduction in drying efficiency. In order to ensure the normal operation of the system and avoid performance degradation and potential failures, regular regeneration of the dryer is particularly important. Air with too high humidity may condense or evaporate when the temperature changes, which seriously affects the normal operation and long-term stability of the air suspension. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a gas supply system of an air suspension with multiple working modes. The gas supply system has the advantages of reducing the regeneration temperature of the drying agent and prolonging the service life of the electrical components.

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

[0006] The gas supply system of the air suspension with multiple working modes according to the embodiment of the present application has an air suction mode, an air suspension lifting mode, an air suspension lowering mode and a vacuum drying mode that can be switched with each other.

[0007] The gas supply system includes an air tank, a plurality of air springs, a gas supply valve body group, a temperature and pressure sensor, a vacuum suction valve pipeline, an air inlet valve pipeline and a negative pressure pipeline.

[0008] The air 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 group has a first air passage port, a second air passage port and a plurality of third air passage ports, the second air passage port is communicated with the air tank, the plurality of third air passage ports are communicated with the plurality of air springs one by one, the temperature and pressure sensor is used for acquiring the temperature and humidity of the air entering the air spring to determine whether the vacuum drying mode is started or not; the vacuum suction valve pipeline includes a vacuum generator, the air inlet valve pipeline includes a dryer, the first air passage port of the air supply valve body group is communicated with the outside through the parallelly arranged vacuum suction valve pipeline and air inlet valve pipeline, and the vacuum generator and the dryer are selectively communicated through the negative pressure pipeline.

[0009] When the air supply system is in the air suction mode, the valve of the air supply valve body group is switched to close the plurality of third air passage ports, and the first air passage port and the second air passage port are communicated, the first air passage port is communicated with the outside through the air inlet valve pipeline to suck the outside air into the air tank to complete the system air supplement.

[0010] When the air supply system is in the air suspension lifting mode, the valve of the air supply valve body group is switched to close the first air passage port, and the second air passage port and the plurality of third air passage ports are communicated, the gas in the air tank is compressed through the air passage of the air supply valve body group into the plurality of air springs to lift the air springs.

[0011] When the air supply system is in the air suspension lowering mode, the valve of the air supply valve body group is switched to close the first air passage port, and the second air passage port and the plurality of third air passage ports are communicated, the gas in the plurality of air springs is extracted through the air passage of the air supply valve body group into the air tank to lower the height of the air springs.

[0012] When the air supply system is in the vacuum drying mode, the valve of the air supply valve body group is switched to close the plurality of third air passage ports, and the first air passage port and the second air passage port are communicated, the first air passage port is communicated with the outside through the vacuum suction valve pipeline to generate suction air flow by the vacuum generator, and the vacuum generator and the dryer are communicated through the negative pressure pipeline to extract the internal water vapor negative pressure of the dryer through the suction air flow.

[0013] The air supply system of the air suspension with multiple working modes of the embodiment of the application can adapt to multiple pressure building working modes of the air suspension of the vehicle and drying operation of the drying agent, and can flexibly switch different working modes according to actual needs. Furthermore, the air supply system has the advantage of good adaptability.

[0014] In addition, the air supply system can regenerate the desiccant according to the saturation of the dryer in the vacuum drying mode, effectively reducing the problem of poor air suspension stability or even failure caused by the saturation of the desiccant. At the same time, the negative pressure pipeline connects the vacuum generator of the vacuum suction valve pipeline and the dryer on the air inlet valve pipeline. When the system switches to the vacuum drying mode, the vacuum generator is started to generate suction airflow in the vacuum generator when the first air port is connected to the outside through the vacuum suction valve pipeline. The vacuum generator connected through the negative pressure pipeline and the dryer can exhaust the gas in the dryer to form a negative pressure state in the dryer. The water vapor in the desiccant is also exhausted with the airflow in the negative pressure state, which greatly reduces the temperature required for the regeneration of the dryer and breaks the traditional design of heating for desiccant regeneration, thereby protecting the electrical components in the system.

[0015] Therefore, the air supply system of the air suspension with multiple working modes has the advantages of good adaptability, reduced desiccant regeneration temperature, and protection of electronic components.

[0016] In some embodiments, the air supply system of the air suspension with multiple working modes further comprises an exhaust pipeline, the air supply system further comprises an exhaust backflushing mode, the air inlet valve pipeline comprises an air inlet pipeline and a one-way valve, an air pump assembly and the dryer which are sequentially arranged on the air inlet pipeline; one end of the exhaust pipeline is in communication with the pipeline section of the air inlet pipeline between the air pump assembly and the dryer, and the other end of the exhaust pipeline is in communication with the pipeline section of the vacuum suction valve pipeline close to the exhaust port;

[0017] When the air supply system is in the exhaust backflushing mode, the valve of the air supply valve body group is switched to close the plurality of third air ports, and the first air port and the second air port are in communication. The first air port is in communication with the outside through a part of the air inlet pipeline and the exhaust pipeline.

[0018] In some embodiments, the air supply system of the air suspension with multiple working modes further comprises a throttle valve and a steering valve, the air inlet pipeline comprises a gas compression section, a drying section, a first subsection and a second subsection, the throttle valve is arranged on the first subsection, the steering valve is arranged on the second subsection, the first subsection and the second subsection are connected in series between one end of the drying section and the first air port of the air supply valve body group, the other end of the drying section is connected with the gas compression section, the one-way valve and the air pump assembly are arranged on the gas compression section, the dryer is arranged on the drying section, and the exhaust pipeline and the gas compression section are in communication with the drying section in series;

[0019] When the air supply system is in the exhaust backwash mode, the gas in the gas storage tank is sequentially discharged to the outside through the air supply valve group, the first section, the drying section and the exhaust pipeline.

[0020] When the air supply system is in the air suction mode, the air from the outside is compressed by the gas pump assembly of the gas compression section, dried by the dryer of the drying section, passed through the second section and the air supply valve group, and then enters the gas storage tank.

[0021] In some embodiments, the gas pump assembly comprises a gas pump and a motor, and the motor can drive the gas pump to compress the air from the outside and flow to the dryer and the gas storage tank.

[0022] In some embodiments, the air inlet valve pipeline further comprises an air filter, and in the air suction mode, the air filter is arranged on the upstream pipe section of the one-way valve of the gas compression section to filter the air flow before entering the one-way valve.

[0023] In some embodiments, the air supply system further comprises an internal circulation heat storage mode, and the air supply valve group further comprises a fourth air port; when the air supply system is in the internal circulation heat storage mode, the valve of the air supply valve group is switched to close a plurality of third air ports and open the first air port, the second air port and the fourth air port, and the gas storage tank, the second air port of the air supply valve group, the fourth air port of the air supply valve group, the gas compression section, the drying section, the second section and the first air port of the air supply valve group are sequentially and circularly connected.

[0024] In some embodiments, the vacuum suction valve pipeline comprises a vacuum suction pipe, a vacuum generator and a first vacuum valve arranged on the vacuum suction pipe, and the first vacuum valve is arranged on the pipe section of the vacuum suction pipe between the vacuum generator and the first air port of the air supply valve group.

[0025] In some embodiments, the negative pressure pipeline comprises a negative pressure pipe and a second vacuum valve arranged on the negative pressure pipe, and the two ends of the negative pressure pipe are respectively connected with the vacuum generator and the dryer, and the second vacuum valve is used to regulate the connection between the vacuum generator and the dryer.

[0026] In some embodiments, the air supply valve group comprises a plurality of air supply valves, a plurality of reversing valves and an air supply pipe, the plurality of reversing valves form the first air port, the second air port and a plurality of third air ports, the plurality of third air ports are connected with the plurality of air supply valves through the air supply pipe, and the plurality of air supply valves are arranged one-to-one on the pipelines corresponding to the plurality of air springs.

[0027] The air supply method of the air suspension system of the embodiment of the present application performs air suction from the atmosphere to the air tank, detects the current gas temperature entering the air spring through a temperature pressure sensor, and if the gas temperature is less than the boiling point of water in a vacuum environment, adjusts the air supply system to a vacuum drying mode until a vacuum state is formed inside the dryer, and completes the drying agent regeneration.

[0028] In some embodiments, air suction is performed from the atmosphere to the air tank, the current gas temperature entering the air spring is detected through a temperature pressure sensor, and if the current temperature is less than the boiling point of water in a vacuum environment, the internal circulation heat accumulation mode is used until the temperature reaches the boiling point of water in a vacuum environment, then the air supply system is adjusted to a vacuum drying mode until a vacuum state is formed inside the dryer, and then the air supply system is adjusted to an exhaust back flushing mode to discharge the moisture in the drying agent, and when the gas in the air tank is completely discharged, the drying agent regeneration is completed. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a component connection diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application.

[0030] Figure 2 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the air suction mode.

[0031] Figure 3 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the air suspension raising mode.

[0032] Figure 4 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the air suspension lowering mode.

[0033] Figure 5 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the vacuum drying mode.

[0034] Figure 6 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the exhaust back flushing mode.

[0035] Figure 7 is a gas flow direction diagram of the air supply system of the air suspension with multiple working modes of the embodiment of the present application in the internal circulation heat accumulation mode.

[0036] Figure 8 is a drying agent regeneration control principle diagram of the air supply system of the embodiment of the present application.

[0037] REFERENCE NUMERALS:

[0038] Air tank 1;

[0039] Air spring 2;

[0040] Air supply valve group 3;

[0041] Air supply valve 31; first air supply valve 311; second air supply valve 312; third air supply valve 313; fourth air supply valve 314;

[0042] Reversing valve 32; first reversing valve 321; second reversing valve 322; third reversing valve 323; fourth reversing valve 324;

[0043] Air supply pipe 33;

[0044] Temperature pressure sensor 4;

[0045] Vacuum suction valve pipe 5; vacuum generator 51; first vacuum valve 52; vacuum suction pipe 53;

[0046] Air inlet valve pipe 6;

[0047] Drier 61; check valve 62; air pump assembly 63; air pump 631; motor 632;

[0048] Air compression section 641; drying section 642; first section 643; second section 644; throttle valve 65; steering valve 66; air filter 67;

[0049] Negative pressure pipe 7; negative pressure pipe 71; second vacuum valve 72;

[0050] Exhaust pipe 8; exhaust valve 81. DETAILED DESCRIPTION

[0051] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0052] Reference is made below Figures 1-8 A gas supply system and a gas supply method of an air suspension having multiple working modes are described below.

[0053] The gas supply system of the air suspension having multiple working modes of the embodiments of the present application has an air suction mode, an air suspension lifting mode, an air suspension lowering mode and a vacuum drying mode which can be switched to each other.

[0054] The gas supply system includes an air tank 1, a plurality of air springs 2, an air supply valve group 3, a temperature pressure sensor 4, a vacuum suction valve pipe 5, an air inlet valve pipe 6 and a negative pressure pipe 7.

[0055] The air tank 1 is used for storing compressed air, the air spring 2 is used for inputting high pressure air to each wheel of the vehicle, the air supply valve group 3 has a first air port, a second air port and a plurality of third air ports, the second air port is communicated with the air tank 1, the plurality of third air ports are communicated with the plurality of air springs 2 one by one, the temperature and pressure sensor 4 is used for acquiring the temperature and humidity of the air entering the air spring 2 to judge whether the vacuum drying mode is started or not, the vacuum suction valve pipeline 5 includes a vacuum generator 51, the air inlet valve pipeline 6 includes a dryer 61, the first air port of the air supply valve group 3 is communicated with the outside through the parallelly arranged vacuum suction valve pipeline 5 and the air inlet valve pipeline 6, and the vacuum generator 51 and the dryer 61 are selectively communicated through the negative pressure pipeline 7.

[0056] As shown in the figure, Figure 2 when the air supply system is in the air suction mode, the valve of the air supply valve group 3 is switched to make the plurality of third air ports closed, and the first air port and the second air port communicated, the first air port is communicated with the outside through the air inlet valve pipeline 6 to make the outside air sucked into the air tank 1 to complete the air supplement of the system.

[0057] As shown in the figure, Figure 3 when the air supply system is in the air suspension lifting mode, the valve of the air supply valve group 3 is switched to make the first air port closed, and the second air port and the plurality of third air ports communicated, the air in the air tank 1 is compressed to the plurality of air springs 2 through the air path of the air supply valve group 3 to make the air spring 2 lifted.

[0058] As shown in the figure, Figure 4 when the air supply system is in the air suspension lowering mode, the valve of the air supply valve group 3 is switched to make the first air port closed, and the second air port and the plurality of third air ports communicated, the air in the plurality of air springs 2 is sucked into the air tank 1 through the air path of the air supply valve group 3 to make the air spring 2 lowered.

[0059] As shown in the figure, Figure 5 when the air supply system is in the vacuum drying mode, the valve of the air supply valve group 3 is switched to make the plurality of third air ports closed, and the first air port and the second air port communicated, the first air port is communicated with the outside through the vacuum suction valve pipeline 5 to generate the suction air flow in the vacuum generator 51, and the vacuum generator 51 is communicated with the dryer 61 through the negative pressure pipeline 7 to suck out the internal water vapor of the dryer 61 through the suction air flow.

[0060] The air supply system of the air suspension with multiple working modes has the advantages that multiple adjustable and controllable modes are arranged, the multiple pressure building working modes of the air suspension of the vehicle and the drying operation of the drying agent can be adapted, different working modes can be switched flexibly according to the actual needs, and the air supply system has the advantage of good adaptability.

[0061] In addition, the air supply system can regenerate the desiccant according to the saturation of the dryer 61 by setting the vacuum drying mode, effectively reducing the problem of poor air suspension stability or even failure of the vehicle caused by the saturation of the desiccant. At the same time, the negative pressure pipeline 7 communicates the vacuum generator 51 of the vacuum suction valve pipeline 5 with the dryer 61 on the air inlet valve pipeline 6. When the vacuum drying mode is switched, the vacuum generator 51 is started when the first vent port is communicated with the outside through the vacuum suction valve pipeline 5, and the vacuum generator 51 and the dryer 61 communicated through the negative pressure pipeline 7 can exhaust the gas in the dryer 61 to form a negative pressure state in the dryer 61. The water vapor in the desiccant is also exhausted with the airflow in the negative pressure state, which not only greatly reduces the temperature required for the regeneration of the dryer 61, but also breaks the traditional way of heating the desiccant regeneration. The reduction of the regeneration temperature of the desiccant is also conducive to the protection of the electrical elements in the system.

[0062] Therefore, the air supply system of the air suspension with multiple working modes has the advantages of good adaptability, reduced desiccant regeneration temperature, and protection of electronic components.

[0063] As shown in Figure 6 The air supply system of the air suspension with multiple working modes also includes an exhaust pipeline 8. The air supply system also includes an exhaust backflushing mode. The air inlet valve pipeline 6 includes an air inlet pipeline and a one-way valve 62, an air pump assembly 63, and a dryer 61 arranged in sequence on the air inlet pipeline. One end of the exhaust pipeline 8 is communicated with the pipeline section of the air inlet pipeline between the air pump assembly 63 and the dryer 61. The other end of the exhaust pipeline 8 is communicated with the pipeline section of the vacuum suction valve pipeline 5 close to the exhaust port. It can be understood that during backflushing, the gas does not need to pass through the air pump assembly 63, avoiding the use frequency of the start of the air pump assembly 63, and being conducive to reducing the noise during the operation of the air supply system.

[0064] When the air supply system is in the exhaust backflushing mode, the valve of the air supply valve body set 3 is switched to close the multiple third vent ports, and the first vent port and the second vent port are communicated. The first vent port is communicated with the outside through a part of the air inlet pipeline and the exhaust pipeline 8.

[0065] The air supply system of the air suspension with multiple working modes sets the exhaust pipeline 8 to cooperate with other components to realize the exhaust backflushing mode of the air supply system. One end of the exhaust pipeline 8 is communicated with the pipeline section of the air inlet pipeline between the air pump assembly 63 and the dryer 61. The other end of the exhaust pipeline 8 is communicated with the pipeline section of the vacuum suction valve pipeline 5 close to the exhaust port. The exhaust backflushing mode cooperates with the vacuum drying mode to greatly improve the service life and efficiency of the desiccant. The regeneration function of the system to the desiccant is improved.

[0066] Specifically, the exhaust pipeline 8 is provided with an exhaust valve 81.

[0067] As shown in Figures 1 to 6 the air supply system of the air suspension with multiple working modes of the embodiment of the application further comprises a throttle valve 65 and a diversion valve 66, the throttle valve 65 is arranged on the first section 643, the diversion valve 66 is arranged on the second section 644, the air inlet pipeline comprises a gas compression section 641, a drying section 642, the first section 643 and the second section 644, the first section 643 and the second section 644 are connected in parallel between one end of the drying section 642 and the first air inlet port of the air supply valve body set 3, the other end of the drying section 642 is connected with the gas compression section 641, the one-way valve 62 and the gas pump assembly 63 are both arranged on the gas compression section 641, the dryer 61 is arranged on the drying section 642, and the exhaust pipeline 8 and the gas compression section 641 are in communication with the drying section 642 in parallel. The two ends of each of the first section 643 and the second section 644 are connected with one end of the drying section 642 and the first air inlet port of the air supply valve body set 3 respectively.

[0068] The air supply system of the air suspension with multiple working modes of the embodiment of the application can improve the flexibility of conversion between the exhaust backflush mode and the air suction mode and the simplicity of pipeline design by connecting the first section 643 and the second section 644 in parallel between one end of the drying section 642 and the first air inlet port of the air supply valve body set 3.

[0069] As shown in Figure 6 when the air supply system is in the exhaust backflush mode, the gas in the gas storage tank 1 is sequentially discharged to the outside through the air supply valve body set 3, the first section 643, the drying section 642 and the exhaust pipeline 8. It can be understood that the throttle valve 65 can control the opening and closing of the line in the exhaust backflush mode. That is, in the exhaust backflush mode, the throttle valve 65 needs to be opened, and in the air suction mode, the throttle valve 65 needs to be closed.

[0070] As shown in Figure 2 when the air supply system is in the air suction mode, the gas in the outside is compressed by the gas pump assembly 63 of the gas compression section 641, dried by the dryer 61 of the drying section 642, enters the gas storage tank 1 through the second section 644 and the air supply valve body set 3.

[0071] The air supply system of the air suspension with multiple working modes of the embodiment of the application can improve the flexibility of switching between various modes by dividing the air inlet pipeline into the gas compression section 641, the drying section 642, the first section 643 and the second section 644, and arranging the throttle valve 65 on the first section 643 and the diversion valve 66 on the second section 644.

[0072] As shown in Figures 1 to 7As shown, the air inlet valve circuit 6 further comprises an air filter 67, which is arranged on the upstream pipe section of the gas compression section 641 of the one-way valve 62 in the air intake mode to filter the air flow before entering the one-way valve 62.

[0073] The air supply system of the air suspension with multiple working modes according to the embodiment of the present application filters the air flow before entering the one-way valve 62 by arranging the air filter 67 on the upstream pipe section of the gas compression section 641 of the one-way valve 62. The impurities are prevented from adhering to the dryer 61 and affecting the service life of the air pump 631.

[0074] As shown, Figure 7 The air supply system further comprises an internal circulation heat storage mode, and the air supply valve body group 3 further has a fourth air port; when the air supply system is in the internal circulation heat storage mode, the valve of the air supply valve body group 3 is switched to close the multiple third air ports, and the first air port, the second air port and the fourth air port are opened, and the gas tank 1, the second air port of the air supply valve body group 3, the fourth air port of the air supply valve body group 3, the gas compression section 641, the drying section 642, the second section 644 and the first air port of the air supply valve body group 3 are sequentially and circularly communicated. It can be understood that in the internal circulation heat storage mode, the air flow passes through the air pump 631 on the gas compression section 641.

[0075] The air supply system of the air suspension with multiple working modes according to the embodiment of the present application forms the internal circulation heat storage mode, and the gas tank 1, the second air port of the air supply valve body group 3, the fourth air port of the air supply valve body group 3, the gas compression section 641, the drying section 642, the second section 644 and the first air port of the air supply valve body group 3 are sequentially and circularly communicated to form a self-heating cycle, the internal circulation heat storage mode is used to improve the air temperature in the system, and if it is determined that the temperature reaches the boiling point temperature of the water under vacuum, the dryer 61 is further pumped, and the efficiency of the drying agent is improved.

[0076] As shown, Figure 3 The vacuum suction valve circuit 5 comprises a vacuum suction pipe 53, and a vacuum generator 51 and a first vacuum valve 52 arranged on the vacuum suction pipe 53, and the first vacuum valve 52 is arranged on the pipe section of the vacuum suction pipe 53 between the vacuum generator 51 and the first air port of the air supply valve body group 3.

[0077] The air supply system of the air suspension with multiple working modes according to the embodiment of the present application sets the first vacuum valve 52 on the pipe section of the vacuum suction pipe 53 between the vacuum generator 51 and the first air port of the air supply valve body group 3.

[0078] Specifically, the vacuum generator 51 has an air inlet, an air outlet and a connecting port, the vacuum suction pipe 53 includes an upstream suction pipe and a downstream suction pipe, two ends of the upstream suction pipe are connected with the first air port of the air supply valve body group 3 and the air inlet of the vacuum generator 51 respectively, the downstream suction pipe is connected with the air outlet of the vacuum generator 51, and the first vacuum valve 52 is arranged on the upstream suction pipe. The air outlet of the negative pressure pipeline 7 is connected with the connecting port of the vacuum generator 51.

[0079] As shown in Figure 5 , the negative pressure pipeline 7 includes a negative pressure pipe 71 and a second vacuum valve 72 arranged on the negative pressure pipe 71, two ends of the negative pressure pipe 71 are communicated with the vacuum generator 51 and the dryer 61 respectively, and the second vacuum valve 72 is used for regulating the communication between the vacuum generator 51 and the dryer 61.

[0080] The air supply system of the air suspension with multiple working modes in the embodiment of the application includes the negative pressure pipeline 7 including the negative pressure pipe 71 and the second vacuum valve 72 arranged on the negative pressure pipe 71, and the second vacuum valve 72 is arranged to control the communication between the vacuum generator 51 and the dryer 61, thereby realizing the regeneration of the dryer 61. When mode switching is performed, the switching between modes can be realized through the control between different valves. Therefore, the air supply system has the advantages of simple structure design.

[0081] The first vacuum valve 52 and the second vacuum valve 72 can be electric control valves.

[0082] As shown in Figures 1 to 7 , the air pump assembly 63 includes an air pump 631 and a motor 632, and the motor 632 can drive the air pump 631 to press the external air into the dryer 61 and flow to the air tank 1.

[0083] The air supply system of the air suspension with multiple working modes in the embodiment of the application includes the air pump assembly 63 including the air pump 631 and the motor 632, and the motor 632 can drive the air pump 631 to press the external air into the dryer 61 and flow to the air tank 1.

[0084] As shown in Figures 1 to 7 , the air supply valve body group 3 includes a plurality of air supply valves 31, a plurality of reversing valves 32 and an air supply pipe 33, the plurality of reversing valves 32 form a first air port, a second air port and a plurality of third air ports, the plurality of third air ports are communicated with the plurality of air supply valves 31 through the air supply pipe 33, and the plurality of air supply valves 31 are arranged one by one on the pipelines corresponding to the plurality of air springs 2.

[0085] The air supply system of the air suspension with multiple working modes in the embodiment of the application divides the air supply valve body group 3 into the plurality of air supply valves 31, the plurality of reversing valves 32 and the air supply pipe 33, and in the air suspension lifting mode and the air suspension lowering mode, the corresponding control of each air spring 2 can be realized through the air supply valve 31.

[0086] Specifically, the plurality of air supply valves 31 can include a first air supply valve 311, a second air supply valve 312, a third air supply valve 313 and a fourth air supply valve 314. That is, the number of air springs 2 is also four to correspond to the plurality of wheels of the vehicle. Optionally, the air supply valve 31 can be an air spring valve. The temperature pressure sensor 4 can be arranged on the pipeline close to the air supply valve 31. And the first air supply valve 311, the second air supply valve 312, the third air supply valve 313 and the fourth air supply valve 314 are respectively corresponding to the four air springs 2 one by one. One end of the first air supply valve 311, one end of the second air supply valve 312, one end of the third air supply valve 313 and one end of the fourth air supply valve 314 are respectively communicated with the third air passage of the plurality of reversing valves 32. The other end of the first air supply valve 311, the other end of the second air supply valve 312, the other end of the third air supply valve 313 and the other end of the fourth air supply valve 314 are respectively connected to one air spring 2. The plurality of reversing valves 32 can include a first reversing valve 321, a second reversing valve 322, a third reversing valve 323 and a fourth reversing valve 324.

[0087] In the air intake mode, the first reversing valve 321, the fourth reversing valve 324 and the steering valve 66 are opened. The motor 632 drives the air pump 631 to suck air from the air filter 67, compresses it into the air tank 1 through the air path, and completes the air supply of the system.

[0088] In the air suspension lifting mode, the first reversing valve 321, the third reversing valve 323 and the steering valve 66 are opened. The motor 632 drives the air pump 631 to compress the air in the air tank 1 to the four air springs 2 through the air path and the four air spring valves, so that the air spring is lifted, thereby realizing the lifting of the vehicle height. In the air suspension lifting mode, the gas will be further pressurized by the air pump 631. Thus, the air supply system improves the efficiency of air suspension adjustment.

[0089] In the air suspension lowering mode, the second reversing valve 322, the fourth reversing valve 324 and the steering valve 66 are opened. The motor 632 drives the air pump 631 to compress the air in the air spring 2 to the air tank 1 through the air path and the four air spring valves, so that the air spring is lowered, thereby realizing the lowering of the vehicle height. Similarly, the gas will be further pressurized by the air pump 631. Thus, the air supply system improves the efficiency of air suspension adjustment.

[0090] In the vacuum drying mode, the first vacuum valve 52, the second vacuum valve 72 and the fourth reversing valve 324 are opened, and the compressed gas in the air tank 1 flows out under the action of pressure difference through the vacuum generator 51. The vacuum generator 51 generates suction flow, so that negative pressure is generated in the dryer 61, the gas is sucked away, and vacuum degree is formed in the dryer 61.

[0091] In the exhaust backflush mode, the fourth reversing valve 324, the exhaust valve 81 and the throttle valve 65 are opened by energization. The gas in the gas tank 1 is discharged to the atmosphere through the throttle valve 65 and the dryer 61 by pressure difference, and the exhaust regeneration of the dryer 61 is completed.

[0092] In the internal circulation heat storage mode, the third reversing valve 323, the fourth reversing valve 324 and the reversing valve 66 are opened. The motor 632 drives the air pump 631 to pump out the air in the gas tank 1 and circulate in the air circuit, and the circulating air is heated by the system.

[0093] In the above modes, the valves not mentioned as being opened are in the closed state. In the corresponding state diagrams 2-7, the connected state is shown by the thickened line.

[0094] The air supply method of the air suspension system of the embodiment of the application comprises the following steps: air is sucked from the atmosphere into the gas tank 1, the current gas temperature in the air spring 2 is detected by the temperature and pressure sensor 4, if the gas temperature is less than the boiling point of water in a vacuum environment, the air supply system is adjusted to the vacuum drying mode until a vacuum state is formed in the interior of the dryer 61, and the regeneration of the drying agent is completed.

[0095] Therefore, the air supply method of the air suspension system of the embodiment of the application has the advantages of good adaptability, reduced regeneration temperature of the dryer 61 and protection of the service life of electronic components.

[0096] Air is sucked from the atmosphere into the gas tank 1, the current gas temperature in the air spring 2 is detected by the temperature and pressure sensor 4, if the current temperature is less than the boiling point of water in a vacuum environment, the internal circulation heat storage mode is used until the temperature reaches the boiling point of water in a vacuum environment, then the air supply system is adjusted to the vacuum drying mode until a vacuum state is formed in the interior of the dryer 61, then the air supply system is adjusted to the exhaust backflush mode to discharge the moisture in the drying agent, and the regeneration of the drying agent is completed after the gas in the gas tank 1 is completely discharged.

[0097] 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.

[0098] In addition, the terms "first", "second", etc. are used only to describe different instances, and are not used to indicate or imply relative importance or a number of indications of the technical features indicated. Therefore, the features defined as "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.

[0099] 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 fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between 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.

[0100] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "on", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0101] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like 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 application. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present description and the features of different embodiments or examples, without contradiction.

[0102] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An air supply system for an air suspension having a plurality of operating modes, characterized by, The air supply system has air suction mode, air suspension lifting mode, air suspension lowering mode and vacuum drying mode which can be switched with each other, and comprises: an air tank for storing compressed air; a plurality of air springs for inputting high-pressure air to each wheel of a vehicle; an air supply valve group having a first air passage port, a second air passage port and a plurality of third air passage ports, the second air passage port being communicated with the air tank, the plurality of third air passage ports being communicated with the plurality of air springs one by one, and a temperature and pressure sensor for obtaining air temperature and humidity entering the air springs to determine whether the vacuum drying mode is started or not; a vacuum suction valve pipeline including a vacuum generator, an air inlet valve pipeline including a dryer, the first air passage port of the air supply valve group being communicated with the outside through the vacuum suction valve pipeline and the air inlet valve pipeline arranged in parallel, and the vacuum generator and the dryer being selectively communicated through a negative pressure pipeline; when the air supply system is in the air suction mode, the valves of the air supply valve group are switched to close the plurality of third air passage ports, and the first air passage port and the second air passage port are communicated, the first air passage port being communicated with the outside through the air inlet valve pipeline to enable the outside air to be sucked into the air tank to complete system air charging; when the air supply system is in the air suspension lifting mode, the valves of the air supply valve group are switched to close the first air passage port, and the second air passage port and the plurality of third air passage ports are communicated, the air in the air tank being compressed through the air passage of the air supply valve group to the plurality of air springs to lift the air springs; when the air supply system is in the air suspension lowering mode, the valves of the air supply valve group are switched to close the first air passage port, and the second air passage port and the plurality of third air passage ports are communicated, the air in the plurality of air springs being extracted through the air passage of the air supply valve group to the air tank to lower the air springs; when the air supply system is in the vacuum drying mode, the valves of the air supply valve group are switched to close the plurality of third air passage ports, and the first air passage port and the second air passage port are communicated, the first air passage port being communicated with the outside through the vacuum suction valve pipeline to generate suction air flow by the vacuum generator, and the vacuum generator and the dryer being communicated through the negative pressure pipeline to extract the internal water vapor of the dryer by the suction air flow.

2. The air supply system for an air suspension having multiple operating modes according to claim 1, characterized in that Further comprising an air exhaust pipeline, the air supply system further comprising an air exhaust back flushing mode, the air inlet valve pipeline comprising an air inlet pipeline and a one-way valve, an air pump assembly and the dryer arranged in sequence on the air inlet pipeline; one end of the air exhaust pipeline being communicated with the pipeline section of the air inlet pipeline between the air pump assembly and the dryer, and the other end of the air exhaust pipeline being communicated with the pipeline section of the vacuum suction valve pipeline close to the air exhaust port. When the air supply system is in the exhaust backwash mode, the valves of the air supply valve body group are switched to close the plurality of third air ports and to connect the first air port and the second air port, and the first air port is connected to the outside through a part of the air inlet pipeline and the exhaust pipeline.

3. The air supply system for air suspension having multiple operating modes according to claim 2, characterized in that, The air inlet pipeline further comprises a gas compression section, a drying section, a first sub-section and a second sub-section, a throttle valve is arranged on the first sub-section, and a diversion valve is arranged on the second sub-section, the first sub-section and the second sub-section are connected in parallel between one end of the drying section and the first air port of the air supply valve body group, the other end of the drying section is connected to the gas compression section, the one-way valve and the gas pump assembly are arranged on the gas compression section, and the dryer is arranged on the drying section, and the exhaust pipeline and the gas compression section are connected in parallel to the drying section; When the air supply system is in the exhaust backwash mode, the gas in the gas storage tank is sequentially discharged to the outside through the air supply valve body group, the first sub-section, the drying section and the exhaust pipeline; When the air supply system is in the air suction mode, the gas from the outside is compressed by the gas pump assembly of the gas compression section, dried by the dryer of the drying section, passed through the second sub-section, the air supply valve body group, and then enters the gas storage tank; The gas pump assembly comprises a gas pump and a motor, and the motor can drive the gas pump to compress the air from the outside and flow to the dryer and the gas storage tank.

4. The air supply system for air suspension having a plurality of operating modes according to claim 3, characterized in that, The air inlet pipeline further comprises an air filter, and in the air suction mode, the air filter is arranged on the upstream pipe section of the gas compression section located upstream of the one-way valve to filter the air flow before entering the one-way valve.

5. The air supply system for air suspension having multiple operating modes according to claim 3, characterized in that, The air supply system further comprises an internal circulation heat storage mode, and the air supply valve body group further comprises a fourth air port; When the air supply system is in the internal circulation heat storage mode, the valves of the air supply valve body group are switched to close the plurality of third air ports and to open the first air port, the second air port and the fourth air port, and the gas storage tank, the second air port of the air supply valve body group, the fourth air port of the air supply valve body group, the gas compression section, the drying section, the second sub-section and the first air port of the air supply valve body group are sequentially connected in circulation.

6. The air supply system for air suspension having multiple operating modes according to claim 1, characterized in that, The vacuum suction valve pipeline comprises a vacuum suction pipe and a vacuum generator and a first vacuum valve arranged on the vacuum suction pipe, and the first vacuum valve is arranged on the pipe section of the vacuum suction pipe located between the vacuum generator and the first air port of the air supply valve body group.

7. The air supply system for air suspension having multiple operating modes according to claim 1, characterized in that, The negative pressure pipeline comprises a negative pressure pipe and a second vacuum valve arranged on the negative pressure pipe, and the two ends of the negative pressure pipe are respectively connected to the vacuum generator and the dryer, and the second vacuum valve is used to control the connection between the vacuum generator and the dryer.

8. The air supply system for air suspension having multiple operating modes according to claim 1, characterized in that, The air supply valve body group includes a plurality of air supply valves, a plurality of reversing valves, and an air supply pipe, the plurality of reversing valves form the first air port, the second air port, and a plurality of third air ports, the plurality of third air ports are communicated with the plurality of air supply valves through the air supply pipe, and the plurality of air supply valves are arranged one by one on the pipelines corresponding to the plurality of air springs.

9. An air supply method of an air suspension system, based on the air supply system of the air suspension with multiple working modes according to any one of claims 1-8, characterized in that, Air is sucked from the atmosphere to the air tank, the current gas temperature entering the air spring is detected through a temperature pressure sensor, if the gas temperature is less than the boiling point of water in a vacuum environment, the air supply system is adjusted to a vacuum drying mode until a vacuum state is formed in the interior of the dryer, and the drying agent regeneration is completed.

10. The method of supplying air to an air suspension system according to claim 9, wherein, Air is sucked from the atmosphere to the air tank, the current gas temperature entering the air spring is detected through a temperature pressure sensor, if the current temperature is less than the boiling point of water in a vacuum environment, an internal circulation heat accumulation mode is adopted until the temperature reaches the boiling point of water in a vacuum environment, then the air supply system is adjusted to a vacuum drying mode until a vacuum state is formed in the interior of the dryer, then the air supply system is adjusted to an exhaust backwashing mode to discharge the moisture in the drying agent, and the drying agent regeneration is completed after the gas in the air tank is completely discharged.

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