Air supply system and air supply method of air suspension with multiple working modes

Abstract

The embodiment of the invention provides an air supply system and an air supply method of an air suspension with multiple working modes. Wherein the air supply system comprises an air storage tank, a plurality of air springs, an air supply valve body group, a temperature pressure sensor, a vacuum suction valve pipeline, an air inlet valve pipeline and a negative pressure pipeline. The air supply valve body group is provided with a first ventilation port, a second ventilation port and a plurality of third ventilation ports, the second ventilation port is communicated with the air storage tank, and the plurality of third ventilation ports are communicated with the plurality of air springs in a one-to-one correspondence manner; the vacuum suction valve pipeline comprises a vacuum generator, the air inlet valve pipeline comprises a dryer, a first ventilation port of the air supply valve set is communicated with the outside through the vacuum suction valve pipeline and the air inlet valve pipeline which are arranged in parallel, and the vacuum generator is selectively communicated with the dryer through a negative pressure pipeline. Therefore, the air supply system provided by the embodiment of the invention has the advantages of reducing the regeneration temperature of the drying agent and prolonging the service life of the electric appliance element.

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 with multiple working modes and an air supply method using the air supply system. Background Art

[0002] As an important part of the automobile active suspension system, the air suspension is mainly composed of an air supply unit, air springs, shock absorbing and damping devices, lateral stabilizers, height valves, guide force transmission mechanisms, air tanks and pipelines. It can adjust the stiffness and damping of the suspension in real time according to the movement state of the vehicle and road conditions, so that the suspension system is in the best shock absorption state to improve the vehicle's riding comfort on various road conditions.

[0003] The dryer of the air suspension system will gradually become saturated during continuous operation, resulting in a significant reduction in drying efficiency. In order to ensure the normal operation of the system and avoid system performance degradation and potential failures, regular regeneration of the dryer becomes particularly critical. 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 at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides an air supply system for an air suspension with multiple working modes. The air supply system has the advantages of reducing the regeneration temperature of the desiccant and increasing the service life of the electrical components.

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

[0006] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention has an air intake mode, an air suspension raising mode, an air suspension lowering mode and a vacuum drying mode which can be switched with each other.

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

[0008] 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 group has a first ventilation port, a second ventilation port and a plurality of third ventilation ports, the second ventilation port is connected to the air tank, and the plurality of third ventilation ports are connected to the plurality of air springs one-to-one, and the temperature and pressure sensor is used to obtain the temperature and humidity of the air entering the air spring to determine whether the vacuum drying mode is turned on or not; the vacuum suction valve pipeline includes a vacuum generator, and the intake valve circuit includes a dryer, and the first ventilation port of the air supply valve body group is connected to the outside through the vacuum suction valve pipeline and the intake valve circuit arranged in parallel, and the vacuum generator and the dryer are selectively connected through the negative pressure pipeline.

[0009] When the air supply system is in the air intake mode, the valves of the air supply valve body group are switched to close the plurality of the third ventilation ports, and the first ventilation port is connected to the second ventilation port, and the first ventilation port is connected to the outside through the air intake valve path to allow outside air to be sucked into the air tank to complete the system air replenishment.

[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 ventilation port, and the second ventilation port is connected to the plurality of third ventilation ports, 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 group to lift the air springs.

[0011] When the air supply system is in the air suspension descent mode, the valve of the air supply valve body group is switched to close the first ventilation port, and the second ventilation port is connected to the plurality of third ventilation ports, 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 group to lower the height of the air springs.

[0012] When the air supply system is in the vacuum drying mode, the valves of the air supply valve body group are switched to close the plurality of the third ventilation ports, and the first ventilation port is connected to the second ventilation port, the first ventilation port is connected to the outside through the vacuum suction valve pipeline to generate an entrained airflow in the vacuum generator, and the vacuum generator is connected to the dryer through the negative pressure pipeline to negatively extract the internal water vapor of the dryer through the entrained airflow.

[0013] The air supply system of the air suspension with multiple working modes of the embodiment of the present invention can adapt to various pressure-building working modes and desiccant drying operations of the air suspension of the automobile by setting multiple adjustable and changeable modes, 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 as needed by setting the vacuum drying mode, effectively reducing the problem of poor stability or even failure of the air suspension caused by saturation of the desiccant. At the same time, after the negative pressure pipeline connects the vacuum generator of the vacuum suction valve pipeline with the dryer on the intake valve line, when switching to the vacuum drying mode, when the vacuum suction valve pipeline is connected to the outside through the first ventilation port, the vacuum generator will generate a suction airflow in the vacuum generator after starting the vacuum generator, and the vacuum generator and the dryer connected by the negative pressure pipeline can extract the gas inside the dryer to form a negative pressure state in the dryer. In the negative pressure state, the water vapor in the desiccant is also discharged with the airflow, which not only greatly reduces the temperature required for the regeneration of the dryer, but also breaks the traditional design that the desiccant needs to be heated for regeneration, and is also conducive to protecting the electrical components in the system.

[0015] Therefore, the air supply system of the air suspension with multiple working modes according to the embodiment of the present invention has the advantages of good adaptability, lowering the desiccant regeneration temperature and protecting electronic components.

[0016] In some embodiments, the air supply system of the air suspension with multiple working modes further includes an exhaust pipeline, the air supply system further includes an exhaust blowback mode, the intake valve circuit includes an intake pipeline and a one-way valve, an air pump assembly and the dryer sequentially arranged on the intake pipeline; one end of the exhaust pipeline is connected to a pipe section of the intake pipeline between the air pump assembly and the dryer, and the other end of the exhaust pipeline is connected to a pipe section of the vacuum suction valve pipeline close to the exhaust port;

[0017] When the air supply system is in the exhaust blowback mode, the valve of the air supply valve body group is switched to close the plurality of third ventilation ports, and the first ventilation port is connected to the second ventilation port, and the first ventilation port is connected to the outside through a portion of the intake pipe and the exhaust pipe.

[0018] In some embodiments, the air supply system of the air suspension with multiple working modes further includes a throttle valve and a steering valve, the air intake pipeline includes a gas compression section, a drying section, a first section and a second section, the throttle valve is arranged on the first section, the steering valve is arranged on the second section, the first section and the second section are connected in parallel between one end of the drying section and the first ventilation 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 air pump assembly are both arranged on the gas compression section, 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;

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

[0020] When the air supply system is in the air intake mode, the external gas enters the air storage tank after being compressed by the air pump assembly of the gas compression section, dried by the dryer of the drying section, the second section, and the air supply valve body assembly.

[0021] In some embodiments, the air pump assembly includes an air pump and a motor, and the motor can drive the air pump to press the outside air into the dryer and flow to the air storage tank.

[0022] In some embodiments, the intake valve circuit further includes an air filter. In the inhalation mode, the air filter is disposed on a pipe section of the gas compression section located upstream of the one-way valve to filter the airflow before entering the one-way valve.

[0023] In some embodiments, the air supply system also includes an internal circulation heat storage mode, and the air supply valve body group also has a fourth ventilation port; when the air supply system is in the internal circulation heat storage mode, the valve of the air supply valve body group is switched to close the multiple third ventilation ports, and the first ventilation port, the second ventilation port and the fourth ventilation port are opened, and the air storage tank, the second ventilation port of the air supply valve body group, the fourth ventilation port of the air supply valve body group, the gas compression section, the drying section, the second section and the first ventilation port of the air supply valve body group are cyclically connected in sequence.

[0024] In some embodiments, the vacuum suction valve pipeline includes 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 ventilation port of the air supply valve body group.

[0025] In some embodiments, the negative pressure pipeline includes a negative pressure tube and a second vacuum valve arranged on the negative pressure tube, the two ends of the negative pressure tube are respectively connected to 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 body group includes multiple air supply valves, multiple reversing valves and an air supply pipe. The multiple reversing valves form the first ventilation port, the second ventilation port and multiple third ventilation ports. The multiple third ventilation ports are connected to the multiple air supply valves through the air supply pipe. The multiple air supply valves are arranged one by one on the pipelines corresponding to the multiple air springs.

[0027] The air supply method of the air suspension system of the embodiment of the present invention sucks air from the atmosphere into the air tank, and detects the current temperature of the gas entering the air spring through a temperature and pressure sensor. If the gas temperature is lower 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 inside the dryer, thereby completing the regeneration of the desiccant.

[0028] In some embodiments, air is sucked from the atmosphere into the air tank, and the current temperature of the gas entering the air spring is detected by a temperature and pressure sensor. If the current temperature is lower than the boiling point of water in a vacuum environment, the internal circulation heat storage mode is switched until the temperature reaches the boiling point of water in a vacuum environment. The air supply system is then switched to the vacuum drying mode until a vacuum state is formed inside the dryer. The air supply system is then switched to the exhaust backflush mode to discharge the moisture in the desiccant. The desiccant regeneration is completed after the gas in the air tank is completely discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a connection diagram of air supply system components of an air suspension with multiple working modes according to an embodiment of the present invention.

[0030] Figure 2 It is a gas flow diagram of an air supply system of an air suspension with multiple working modes in an embodiment of the present invention in an air intake mode.

[0031] Figure 3 It is a gas flow diagram of an air supply system of an air suspension with multiple working modes in an air suspension raising mode according to an embodiment of the present invention.

[0032] Figure 4 It is a gas flow diagram of the air supply system of the air suspension with multiple working modes in the air suspension descending mode according to the embodiment of the present invention.

[0033] Figure 5 It is a gas flow diagram of an air supply system of an air suspension with multiple working modes in a vacuum drying mode according to an embodiment of the present invention.

[0034] Figure 6 It is a gas flow diagram of an air supply system of an air suspension with multiple working modes in an embodiment of the present invention in an exhaust blowback mode.

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

[0036] Figure 8 It is a schematic diagram of desiccant regeneration control principle of an air supply system according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] Gas tank 1;

[0039] Air spring 2;

[0040] Air supply valve body 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 and pressure sensor 4;

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

[0046] Intake valve circuit 6;

[0047] Dryer 61; one-way valve 62; air pump assembly 63; air pump 631; motor 632;

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

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

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

[0051] 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.

[0052] Reference below Figure 1-Figure 8 An air supply system and an air supply method of an air suspension with multiple working modes according to an embodiment of the present invention are described.

[0053] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention has an air intake mode, an air suspension raising mode, an air suspension lowering mode and a vacuum drying mode which can be switched with each other.

[0054] The air supply system comprises an air storage tank 1 , a plurality of air springs 2 , an air supply valve body group 3 , a temperature and pressure sensor 4 , a vacuum suction valve pipeline 5 , an air intake valve circuit 6 and a negative pressure pipeline 7 .

[0055] The air tank 1 is used to store compressed air, and the air spring 2 is used to input high-pressure gas to each wheel of the vehicle; the air supply valve body group 3 has a first ventilation port, a second ventilation port and multiple third ventilation ports, the second ventilation port is connected to the air tank 1, and the multiple third ventilation ports are connected to the multiple air springs 2 one by one, and the temperature and pressure sensor 4 is used to obtain the temperature and humidity entering the air spring 2 to determine whether the vacuum drying mode is turned on or not; the vacuum suction valve pipeline 5 includes a vacuum generator 51, and the intake valve circuit 6 includes a dryer 61. The first ventilation port of the air supply valve body group 3 is connected to the outside through the vacuum suction valve pipeline 5 and the intake valve circuit 6 arranged in parallel, and the vacuum generator 51 and the dryer 61 are selectively connected through the negative pressure pipeline 7.

[0056] like Figure 2 As shown, when the air supply system is in the air intake mode, the valves of the air supply valve body group 3 are switched to close the multiple third ventilation ports, and the first ventilation port and the second ventilation port are connected, and the first ventilation port is connected to the outside through the intake valve path 6 to allow the outside air to be sucked into the air storage tank 1 to complete the system air replenishment.

[0057] like Figure 3 As shown, when the air supply system is in the air suspension lifting mode, the valve of the air supply valve body group 3 is switched to close the first ventilation port, and the second ventilation port and multiple third ventilation ports are connected, and the gas in the air storage tank 1 is compressed into multiple air springs 2 through the air path of the air supply valve body group 3 to lift the air springs 2.

[0058] like Figure 4 As shown, when the air supply system is in the air suspension descent mode, the valve of the air supply valve body group 3 is switched to close the first ventilation port, and the second ventilation port and multiple third ventilation ports are connected, and the gas in the multiple air springs 2 is drawn into the air storage tank 1 through the air path of the air supply valve body group 3 to reduce the height of the air springs 2.

[0059] like Figure 5 As shown, when the air supply system is in the vacuum drying mode, the valves of the air supply valve body group 3 are switched to close the multiple third ventilation ports, and the first ventilation port and the second ventilation port are connected, the first ventilation port is connected to the outside through the vacuum suction valve pipeline 5 to generate an entrained airflow in the vacuum generator 51, and the vacuum generator 51 is connected to the dryer 61 through the negative pressure pipeline 7 to negatively extract the internal water vapor of the dryer 61 through the entrained airflow.

[0060] The air supply system of the air suspension with multiple working modes of the embodiment of the present invention can adapt to various pressure-building working modes of the air suspension of the automobile and the drying operation of the desiccant by setting multiple adjustable and changeable modes, and can flexibly switch different working modes according to actual needs. Furthermore, 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 as needed by setting the vacuum drying mode, effectively reducing the problem of poor stability or even failure of the air suspension of the vehicle caused by the saturation of the desiccant. At the same time, after the negative pressure pipeline 7 connects the vacuum generator 51 of the vacuum suction valve pipeline 5 with the dryer 61 on the intake valve circuit 6, when switching to the vacuum drying mode, when the vacuum suction valve pipeline 5 is connected to the outside through the first ventilation port, the vacuum generator 51 is started and a suction airflow is generated in the vacuum generator 51, and the vacuum generator 51 and the dryer 61 connected by the negative pressure pipeline 7 can extract the gas inside the dryer 61 to form a negative pressure state in the dryer 61. The water vapor in the desiccant under the negative pressure state is also discharged with the airflow, which not only greatly reduces the temperature required for the regeneration of the dryer 61, but also breaks the traditional method of heating the desiccant regeneration. Lowering the regeneration temperature of the desiccant is also beneficial to protecting the electrical components in the system.

[0062] Therefore, the air supply system of the air suspension with multiple working modes according to the embodiment of the present invention has the advantages of good adaptability, lowering the desiccant regeneration temperature and protecting electronic components.

[0063] like Figure 6 As shown, the air supply system of the air suspension with multiple working modes in the embodiment of the present invention also includes an exhaust pipeline 8, and the air supply system also includes an exhaust back-blowing mode. The intake valve circuit 6 includes an intake pipeline and a one-way valve 62, an air pump assembly 63 and a dryer 61 which are sequentially arranged on the intake pipeline; one end of the exhaust pipeline 8 is connected to the pipe section of the intake pipeline located between the air pump assembly 63 and the dryer 61, and the other end of the exhaust pipeline 8 is connected to the pipe section of the vacuum suction valve pipeline 5 close to the exhaust port; it can be understood that during back-blowing, the gas does not need to pass through the air pump assembly 63, so as to avoid the frequency of starting the air pump assembly 63, which is beneficial to reducing the noise during the operation of the air supply system.

[0064] When the air supply system is in the exhaust blowback mode, the valves of the air supply valve body group 3 are switched to close the multiple third ventilation ports, and the first ventilation port and the second ventilation port are connected, and the first ventilation port is connected to the outside through a part of the intake pipe and the exhaust pipe 8.

[0065] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention realizes the exhaust blowback mode of the air supply system by setting the exhaust pipe 8 in cooperation with other components. One end of the exhaust pipe 8 is connected to the pipe section of the intake pipe between the air pump assembly 63 and the dryer 61, and the other end of the exhaust pipe 8 is connected to the pipe section of the vacuum suction valve pipe 5 near the exhaust port. The exhaust blowback mode cooperates with the vacuum drying mode to greatly improve the service life and efficiency of the desiccant. Therefore, the regeneration function of the system for the desiccant is improved.

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

[0067] like Figures 1 to 6 As shown, the air supply system of the air suspension with multiple working modes according to the embodiment of the present invention further includes a throttle valve 65 and a steering valve 66, the throttle valve 65 is arranged on the first segment 643, the steering valve 66 is arranged on the second segment 644, the air intake pipeline includes a gas compression segment 641, a drying segment 642, a first segment 643 and a second segment 644, the first segment 643 and the second segment 644 are connected in parallel between one end of the drying segment 642 and the first ventilation port of the air supply valve body group 3, the other end of the drying segment 642 is connected to the gas compression segment 641, the check valve 62 and the air pump assembly 63 are both arranged on the gas compression segment 641, the dryer 61 is arranged on the drying segment 642, and the exhaust pipeline 8 and the gas compression segment 641 are connected in parallel with the drying segment 642. Both ends of each of the first segment 643 and the second segment 644 are respectively connected to one end of the drying segment 642 and the first ventilation port of the air supply valve body group 3.

[0068] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention can improve the flexibility of conversion between the exhaust backwash mode and the intake 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 ventilation port of the air supply valve body group 3.

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

[0070] like Figure 2 As shown, when the air supply system is in the air intake mode, the external gas is compressed by the air pump assembly 63 of the gas compression section 641, dried by the dryer 61 of the drying section 642, the second section 644, and the air supply valve body group 3 before entering the air storage tank 1.

[0071] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention divides the air intake pipeline into a gas compression section 641, a drying section 642, a first section 643 and a second section 644, and arranges the throttle valve 65 on the first section 643 and the steering valve 66 on the second section 644. Thus, the air supply system improves the flexibility of switching between various modes.

[0072] like Figures 1 to 7As shown, the intake valve circuit 6 also includes an air filter 67. In the intake mode, the air filter 67 is arranged on the upstream pipe section of the gas compression section 641 and the one-way valve 62 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 of the embodiment of the present invention filters the air flow before entering the one-way valve 62 by means of the air filter 67 disposed on the upstream pipe section of the gas compression section 641 located at the one-way valve 62, thereby avoiding the impurities adhering to the dryer 61 and the air pump 631 and affecting their service life.

[0074] like Figure 7 As shown, the air supply system also includes an internal circulation heat storage mode, and the air supply valve body group 3 also has a fourth ventilation 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 ventilation ports, and the first ventilation port, the second ventilation port and the fourth ventilation port are opened, and the gas storage tank 1, the second ventilation port of the air supply valve body group 3, the fourth ventilation port of the air supply valve body group 3, the gas compression section 641, the drying section 642, the second segment 644 and the first ventilation port of the air supply valve body group 3 are cyclically connected in sequence. It can be understood that in the internal circulation heat storage mode, the air flow will flow through the air pump 631 on the gas compression section 641.

[0075] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention forms an internal circulation heat storage mode, and the air storage tank 1, the second ventilation port of the air supply valve body group 3, the fourth ventilation 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 ventilation port of the air supply valve body group 3 are circulated and connected in sequence to form a self-heating cycle. The air temperature in the system is increased through the internal circulation heat storage mode. If it is determined that the temperature reaches the boiling point of water under vacuum, the dryer 61 is then drawn to improve the efficiency of the desiccant.

[0076] like Figure 3 As shown, the vacuum suction valve pipeline 5 includes a vacuum suction pipe 53 and a vacuum generator 51 and a first vacuum valve 52 arranged on the vacuum suction pipe 53. 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 ventilation 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 invention is configured by arranging the first vacuum valve 52 on the pipe section of the vacuum suction pipe 53 between the vacuum generator 51 and the first ventilation port of the air supply valve body assembly 3 .

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

[0079] like Figure 5 As shown, the negative pressure pipeline 7 includes a negative pressure tube 71 and a second vacuum valve 72 arranged on the negative pressure tube 71. The two ends of the negative pressure tube 71 are respectively connected to the vacuum generator 51 and the dryer 61. The second vacuum valve 72 is used to regulate the connection 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 present invention includes a negative pressure pipe 71 and a second vacuum valve 72 arranged on the negative pressure pipe 71 through the negative pressure pipeline 7. The second vacuum valve 72 can control the connection between the vacuum generator 51 and the dryer 61, thereby realizing the regeneration of the dryer 61. When switching between modes, the switching between modes can be realized by controlling different valves. Therefore, the air supply system has the advantage of simple structural design.

[0081] The first vacuum valve 52 and the second vacuum valve 72 may both be electrically controlled valves.

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

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

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

[0085] The air supply system of the air suspension with multiple working modes in the embodiment of the present invention divides the air supply valve body group 3 into multiple air supply valves 31, multiple reversing valves 32 and an air supply pipe 33. In the air suspension raising mode and the air suspension lowering mode, each air spring 2 can be correspondingly controlled by the air supply valve 31.

[0086] Specifically, the plurality of air supply valves 31 may 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 may be an air spring valve. The temperature and pressure sensor 4 may be arranged on a 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 correspond 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 connected to the third ventilation 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 an air spring 2. The plurality of reversing valves 32 may 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, and compress it into the air storage tank 1 through the air path to complete the air replenishment of the system.

[0088] In the air suspension raising 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 springs are raised, thereby achieving the height increase of the vehicle. In the air suspension raising mode, the gas will be further pressurized by the air pump 631. Therefore, 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 into the air tank 1 through the air path and the four air spring valves, so that the air spring is lowered, thereby reducing the height of the vehicle. Similarly, the gas will be further pressurized by the air pump 631. Therefore, 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 gas storage tank 1 flows out through the vacuum generator 51 under the action of the pressure difference. The vacuum generator 51 generates a suction flow, so that a negative pressure is generated inside the dryer 61, the gas is sucked away, and a vacuum is formed in the dryer 61.

[0091] In the exhaust blowback mode, the fourth reversing valve 324, the exhaust valve 81, and the throttle valve 65 are powered on and opened. The gas in the gas storage tank 1 is discharged into the atmosphere through the throttle valve 65 and the dryer 61 by the pressure difference, completing the exhaust regeneration of the dryer 61.

[0092] In the internal circulation heat storage mode, the third reversing valve 323, the fourth reversing valve 324 and the steering valve 66 are opened. The motor 632 drives the air pump 631 to extract the air in the air storage tank 1, circulate in the air path, and heat the circulating gas through the heat rise of the system.

[0093] In the above mode, there is no mention of an open valve, which is usually in a closed state. In the corresponding state diagram 2-7, the connected state is the part shown in bold.

[0094] The air supply method of the air suspension system of the embodiment of the present invention includes the following steps: sucking air from the atmosphere into the air storage tank 1, detecting the current gas temperature entering the air spring 2 through the temperature and pressure sensor 4, and if the gas temperature is lower than the boiling point of water under a vacuum environment, adjusting the air supply system to the vacuum drying mode until a vacuum state is formed inside the dryer 61, thereby completing the regeneration of the desiccant.

[0095] Therefore, the air supply method of the air suspension system of the embodiment of the present invention has the advantages of good adaptability, reducing the regeneration temperature of the dryer 61 and protecting the service life of electronic components.

[0096] Air is sucked from the atmosphere into the air storage tank 1, and the current gas temperature entering the air spring 2 is detected by the temperature and pressure sensor 4. If the current temperature is lower than the boiling point of water in a vacuum environment, the internal circulation heat storage mode is switched until the temperature reaches the boiling point of water in a vacuum environment. Then the air supply system is switched to the vacuum drying mode until a vacuum state is formed inside the dryer 61. Then the air supply system is switched to the exhaust backflush mode to discharge the moisture in the desiccant. After the gas in the air storage tank 1 is completely discharged, the desiccant regeneration is completed.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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 with multiple working modes, characterized in that: The air supply system has an air suction mode, an air suspension raising mode, an air suspension descending mode and a vacuum drying mode which can be switched with each other, and the air supply system includes: 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 group and a temperature and pressure sensor, wherein the air supply valve body group has a first ventilation port, a second ventilation port and a plurality of third ventilation ports, wherein the second ventilation port is connected to the air storage tank, and the plurality of third ventilation ports are connected to the plurality of air springs in a one-to-one correspondence, and the temperature and pressure sensor is used to obtain the temperature and humidity of the air entering the air spring to determine whether the vacuum drying mode is turned on or not; A vacuum suction valve pipeline, an air intake valve pipeline and a negative pressure pipeline, wherein the vacuum suction valve pipeline includes a vacuum generator, the air intake valve pipeline includes a dryer, the first ventilation port of the air supply valve body group is connected to the outside through the vacuum suction valve pipeline and the air intake valve pipeline arranged in parallel, and the vacuum generator and the dryer are selectively connected through the negative pressure pipeline; When the air supply system is in the air intake mode, the valves of the air supply valve body group are switched so that the plurality of third ventilation ports are closed, and the first ventilation port is connected to the second ventilation port, and the first ventilation port is connected to the outside through the air intake valve path, so that the outside air is sucked into the air storage tank to complete the system air replenishment; When the air supply system is in an air suspension lifting mode, the valve of the air supply valve body group is switched so that the first ventilation port is closed, and the second ventilation port is connected to the plurality of third ventilation ports, 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 group so that the air springs are lifted; When the air supply system is in an air suspension descent mode, the valve of the air supply valve body group is switched so that the first ventilation port is closed, and the second ventilation port is connected to the plurality of third ventilation ports, and the gas in the plurality of air springs is pumped into the air storage tank through the air path of the air supply valve body group so that the air springs can be lowered; When the air supply system is in the vacuum drying mode, the valves of the air supply valve body group are switched to close the plurality of the third ventilation ports, and the first ventilation port is connected to the second ventilation port, the first ventilation port is connected to the outside through the vacuum suction valve pipeline to generate an entrained airflow in the vacuum generator, and the vacuum generator is connected to the dryer through the negative pressure pipeline to negatively extract the internal water vapor of the dryer through the entrained airflow.

2. The air supply system of the air suspension with multiple working modes according to claim 1, characterized in that: It also includes an exhaust pipeline, the air supply system also includes an exhaust backflush mode, the air intake valve circuit includes an air intake pipeline and a one-way valve, an air pump assembly and the dryer arranged in sequence on the air intake pipeline; one end of the exhaust pipeline is connected to the pipe section of the air intake pipeline located between the air pump assembly and the dryer, and the other end of the exhaust pipeline is connected to the pipe section of the vacuum suction valve pipeline close to the exhaust port; When the air supply system is in the exhaust blowback mode, the valve of the air supply valve body group is switched to close the plurality of third ventilation ports, and the first ventilation port is connected to the second ventilation port, and the first ventilation port is connected to the outside through a portion of the intake pipe and the exhaust pipe.

3. The air supply system of the air suspension with multiple working modes according to claim 2, characterized in that: It also includes a throttle valve and a steering valve, the air intake pipeline includes a gas compression section, a drying section, a first section and a second section, the throttle valve is arranged on the first section, the steering valve is arranged on the second section, the first section and the second section are connected in parallel between one end of the drying section and the first ventilation 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 air pump assembly are both arranged on the gas compression section, 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 gas supply system is in the exhaust back-blowing mode, the gas in the gas storage tank is discharged to the outside through the gas supply valve body group, the first segment, the drying segment and the exhaust pipeline in sequence; When the air supply system is in the air intake mode, the external gas enters the air storage tank after being compressed by the air pump assembly of the gas compression section, dried by the dryer of the drying section, the second section, and the air supply valve body assembly; And / or, the air pump assembly includes an air pump and a motor, and the motor can drive the air pump to press the outside air into the dryer and flow to the air storage tank.

4. The air supply system of the air suspension with multiple working modes according to claim 3, characterized in that: The air intake valve circuit also includes an air filter. In the air intake mode, the air filter is arranged on the upstream pipe section of the gas compression section located at the one-way valve to filter the air flow before entering the one-way valve.

5. The air supply system of the air suspension with multiple working modes according to claim 3, characterized in that: The air supply system also includes an internal circulation heat storage mode, and the air supply valve body group also has a fourth ventilation 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 multiple third ventilation ports, and the first ventilation port, the second ventilation port and the fourth ventilation port are opened, and the air storage tank, the second ventilation port of the air supply valve body group, the fourth ventilation port of the air supply valve body group, the gas compression section, the drying section, the second section and the first ventilation port of the air supply valve body group are connected in a circular manner.

6. The air supply system of the air suspension with multiple working modes according to claim 1, characterized in that: The vacuum suction valve pipeline includes a vacuum suction pipe, a vacuum generator and a first vacuum valve arranged on the vacuum suction pipe. The first vacuum valve is arranged on a pipe section of the vacuum suction pipe between the vacuum generator and the first ventilation port of the air supply valve body group.

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

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

9. An air supply method for an air suspension system, characterized in that Air is sucked from the atmosphere into the air tank, and the current temperature of the gas entering the air spring is detected by a temperature and pressure sensor. If the gas temperature is lower than the boiling point of water under a vacuum environment, the air supply system is adjusted to the vacuum drying mode until a vacuum state is formed inside the dryer, thereby completing the regeneration of the desiccant.

10. The air supply method of the air suspension system according to claim 9, characterized in that: The air supply system of claim 5 is used to inhale air from the atmosphere to the air tank, and the current temperature of the gas entering the air spring is detected by a temperature and pressure sensor. If the current temperature is lower than the boiling point of water in a vacuum environment, an internal circulation heat storage mode is used until the temperature reaches the boiling point of water in a vacuum environment. The air supply system is then adjusted to a vacuum drying mode until a vacuum state is formed inside the dryer. The air supply system is then adjusted to an exhaust backflush mode to discharge moisture from the desiccant, and the desiccant regeneration is completed after the gas in the air tank is completely discharged.

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