Air suspension air supply system and air supply control method

Abstract

The embodiment of the invention provides an air suspension air supply system and an air supply control method, and relates to the technical field of vehicles. The air suspension air supply system comprises an air supply loop and an air supplementing pipeline, wherein the air supply loop is used for inflating or deflating air springs on wheels; the air supply pipeline comprises an air inlet pipeline, a parallel pipeline and an air outlet pipeline which are sequentially communicated, the parallel pipeline comprises an air suction filter and a bypass valve which are arranged in parallel, and the air outlet pipeline is communicated with the air supply loop; an air suction one-way valve is arranged on the air outlet pipeline; the bypass valve is used for outputting a signal representing whether the suction filter is blocked or not. The bypass valve is arranged beside the suction filter, so that the air supply system of the air suspension can be prevented from being blocked, and the system can supply air in emergency; in addition, by arranging the bypass valve, whether the suction filter is blocked and fails or not can be judged in real time through opening and closing of the bypass valve, and a user is prompted to replace the suction filter.

Description

TECHNICAL FIELD

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

[0002] As an important part of the automobile active suspension system, the air suspension is mainly composed of an air supply unit, an air spring, a damping device, a lateral stabilizer, a height valve, a guide force transmission mechanism, an air tank and a pipeline. The air suspension can adjust the stiffness and damping of the suspension in real time according to the motion state of the automobile and the road condition, so that the suspension system is in the best damping state to improve the comfort of the vehicle in various road conditions. In the existing air suspension air supply system, an air suction filter is generally provided. When the system sucks air from the atmosphere to supplement the system air volume, the air suction filter intercepts the particulate impurities such as dust, particles and fibers in the atmosphere in the filter to avoid entering the system to damage the air pump, air bag and block the air passage.

[0003] However, the air suction filter is easy to be blocked after a long time of work, which affects the normal work of the system. The existing air supply system cannot monitor the working state of the air suction filter in real time. SUMMARY

[0004] The present application provides an air suspension air supply system and an air supply control method, which can judge whether the air suction filter is invalid in real time.

[0005] The embodiments of the present application can be implemented as follows: The embodiments of the present application provide an air suspension air supply system, which comprises: An air supply circuit, which is used for inflating or deflating the air spring on the wheel; A gas supplement pipeline, which comprises an air inlet pipeline, a parallel pipeline and an air outlet pipeline connected in sequence, the parallel pipeline comprises an air suction filter and a bypass valve arranged in parallel, and the air outlet pipeline is communicated with the air supply circuit; an air suction check valve is arranged on the air outlet pipeline; The bypass valve is used for outputting a signal representing whether the air suction filter is blocked.

[0006] In the optional embodiment, the bypass valve comprises a conductive spring and a conductive valve; one end of the conductive spring is connected with the conductive valve, and the other end of the conductive spring is used for connecting with the positive electrode of the controller; the side of the conductive valve away from the conductive spring is used for connecting with the negative electrode of the controller to form a current loop.

[0007] In an optional embodiment, the air supply circuit comprises a compressor, a first switching valve, a second switching valve, an exhaust valve, an air tank, an air supply valve group and a dryer regeneration pipeline; the air supply valve group is configured to communicate with the plurality of air springs one by one to control the air springs to inflate or deflate the wheels of the vehicle; The outlet end of the compressor is connected with one end of the dryer regeneration pipeline, and the other end of the dryer regeneration pipeline is connected with the air supply valve group; the second switching valve is arranged between the dryer regeneration pipeline and the air supply valve group; the air tank is connected between the second switching valve and the dryer regeneration pipeline; the inlet end of the compressor is connected with the air supply valve group, and the first switching valve is arranged between the inlet end of the compressor and the air supply valve group. A first exhaust pipeline is arranged between the dryer regeneration pipeline and the outlet end of the compressor, and is configured to communicate with external air, and the exhaust valve is arranged on the first exhaust pipeline.

[0008] In an optional embodiment, the air supply circuit further comprises a second exhaust pipeline, which is connected with the dryer regeneration pipeline in parallel, and is arranged between the outlet end of the compressor and the second switching valve, and the third switching valve is arranged on the second exhaust pipeline. In the case of emergency exhaust, the second switching valve, the third switching valve and the exhaust valve are opened, the gas is discharged through the air supply valve group, directly passes through the second exhaust pipeline and the first exhaust pipeline and is discharged to the external environment, without passing through the dryer regeneration pipeline.

[0009] In an optional embodiment, in the case that the air suspension air supply system does not need to be supplemented with air from the external environment, the third switching valve is opened, and the second switching valve is closed, so that the gas of the air supply circuit no longer passes through the dryer regeneration pipeline.

[0010] In an optional embodiment, the dryer regeneration pipeline is sequentially provided with a fourth switching valve, a dryer, a regeneration injection hole, a one-way valve and a fifth switching valve in the direction from the outlet end of the compressor to the second switching valve; the regeneration injection hole is connected with the one-way valve in parallel.

[0011] In an optional embodiment, after the air spring drops to a preset height, the fifth switching valve is pulsed opened and closed at a preset frequency, so that the gas in the air tank impacts the dryer in a pulse jet manner.

[0012] The embodiment of the present application also provides an air supply control method applied to the air suspension air supply system, and the air supply control method comprises the following steps: Obtaining state information of the bypass valve; According to the state information of the bypass valve, it is judged whether the air inlet filter is blocked.

[0013] In an optional embodiment, the bypass valve is used to form a current loop with the controller; The judging whether the air filter is blocked according to the state information of the bypass valve comprises: In the case that the air filter is blocked or reaches a preset air resistance, the bypass valve is disconnected, resulting in the loss of the controller signal current, and the controller sends a signal prompting to replace the air filter.

[0014] In an optional embodiment, in the case that the bypass valve is in a target state, the controller also sends a control instruction to lock the air supply circuit to perform a desiccant regeneration operation based on external air supplement; the target state is a state caused by the disconnection of the bypass valve resulting in the loss of the controller signal current.

[0015] The air suspension air supply system and the air supply control method have the following advantages, for example: The air suspension air supply system comprises an air supply circuit and an air supplement pipeline, the air supply circuit is used to inflate or deflate the air spring on the wheel; the air supplement pipeline comprises an air inlet pipeline, a parallel pipeline and an air outlet pipeline connected in sequence, the parallel pipeline comprises an air filter and a bypass valve arranged in parallel, and the air outlet pipeline is connected with the air supply circuit; an air inlet check valve is arranged on the air outlet pipeline; the bypass valve is used to output a signal indicating whether the air filter is blocked. By arranging the bypass valve beside the air filter, the air suspension air supply system can be prevented from being blocked, and the system can be supplemented in an emergency; in addition, by arranging the bypass valve, the opening and closing of the bypass valve can also be used to judge in real time whether the air filter is blocked and fails, so as to prompt the user to replace it. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 A schematic diagram of the bypass valve conduction state of the air suspension air supply system provided in the embodiments of the present application; Figure 2 A schematic diagram of the bypass valve disconnection state of the air suspension air supply system provided in the embodiments of the present application.

[0018] Icon: 1000-air suspension air supply system; 100-air supply circuit; 110-compressor; 120-first switch valve; 130-second switch valve; 140-first exhaust circuit; 141-exhaust valve; 150-air tank; 160-air supply valve group; 161-air spring valve; 170-dryer regeneration circuit; 171-fourth switch valve; 172-dryer; 173-regeneration injection hole; 174-check valve; 175-fifth switch valve; 180-second exhaust circuit; 181-third switch valve; 190-temperature and pressure sensor; 200-air supplement circuit; 210-air inlet circuit; 220-parallel circuit; 221-air suction filter; 230-air outlet circuit; 231-air suction check valve; 300-bypass valve; 310-conductive valve; 320-positive electrode seat; 330-negative electrode seat; 340-conductive spring; 400-air spring; 2000-controller. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0021] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0025] The air suspension, as an important part of the active suspension system of the automobile, is mainly composed of an air supply unit, an air spring, a damping device, a lateral stabilizer, a height valve, a guiding force transmission mechanism, an air tank and a pipeline. The air suspension can adjust the stiffness and damping of the suspension in real time according to the motion state of the automobile and the road condition, so that the suspension system is in the best damping state to improve the comfort of the vehicle in various road conditions. In the existing air suspension air supply system, an air suction filter is generally provided. When the system sucks air from the atmosphere to supplement the system air volume, the air suction filter intercepts the particulate impurities such as dust, particles and fibers in the atmosphere in the filter to avoid damage to the air pump, air bag and blockage of the air passage. However, the air suction filter is easy to be blocked after a long time of work, which affects the normal work of the system. The existing air supply system cannot monitor the working state of the air suction filter in real time. That is, when the vehicle is driven on a dusty construction site or a dusty road for a long time, the air suspension will be supplied with air from the outside. Because the dust content in the air is huge, the air suction filter will be quickly blocked due to too much impurity, causing the air pump to be unable to suck air, the system to be unable to supplement air from the outside, and thus causing the air suspension to be unable to work normally. At the same time, the vehicle system and the driver cannot identify the situation, which may cause the suspension to be unable to rise again after the system is exhausted, causing safety problems.

[0026] Based on this, referring to Figure 1 and Figure 2 The air suspension air supply system 1000 provided in the embodiments of the present application can effectively solve the above-mentioned technical problems. The air suspension air supply system 1000 can judge whether the air suction filter 221 is invalid in real time.

[0027] Figure 1 A schematic view of the conductive state of the bypass valve 300 of the air suspension air supply system 1000 provided in the embodiments of the present application is shown in FIG. 2A. Figure 2 A schematic view of the disconnected state of the bypass valve 300 of the air suspension air supply system 1000 provided in the embodiments of the present application is shown in FIG. 2B. Figure 1 and Figure 2As shown, the air suspension air supply system 1000 in the embodiment includes an air supply circuit 100 and a supplementary air circuit 200, the air supply circuit 100 is used to inflate or deflate the air spring 400 on the wheel; the supplementary air circuit 200 includes an air inlet circuit 210, a parallel circuit 220 and an air outlet circuit 230 connected in sequence, the parallel circuit 220 includes an air suction filter 221 and a bypass valve 300 arranged in parallel, and the air outlet circuit 230 is communicated with the air supply circuit 100; the air outlet circuit 230 is provided with an air suction check valve 231; the bypass valve 300 is used to output a signal indicating whether the air suction filter 221 is blocked. By arranging the bypass valve 300 beside the air suction filter 221, the air suspension air supply system 1000 can be prevented from being blocked, and the system can be supplemented with air in an emergency; in addition, by arranging the bypass valve 300, the opening and closing of the bypass valve 300 can also be used to judge whether the air suction filter 221 is blocked or fails in real time, so as to prompt the user to replace it.

[0028] Please refer to Figure 1 and Figure 2 , the bypass valve 300 in the embodiment includes a positive electrode seat 320, a negative electrode seat 330, a conductive spring 340 and a conductive valve 310; one end of the conductive spring 340 is connected with the conductive valve 310, and the other end of the conductive spring 340 is used to be connected with the positive electrode of the controller 2000; the side of the conductive valve 310 away from the conductive spring 340 is used to be connected with the negative electrode of the controller 2000, so as to form a current loop.

[0029] Optionally, the bypass valve 300 in the embodiment further includes the positive electrode seat 320 and the negative electrode seat 330, the conductive spring 340 and the conductive valve 310 are arranged between the positive electrode seat 320 and the negative electrode seat 330, one end of the conductive spring 340 is connected with the positive electrode seat 320, and the other end of the conductive spring 340 is connected with the conductive valve 310; the negative electrode seat 330 is used to be connected with the negative electrode of the controller 2000, and the positive electrode seat 320 is used to be connected with the positive electrode of the controller 2000, so as to form a current loop; the negative electrode seat 330 is connected with the inlet end of the air suction filter 221; the positive electrode seat 320 is connected with the outlet end of the air suction filter 221. In the case that the air suction filter 221 is blocked or reaches a preset air suction resistance, the bypass valve 300 is disconnected, that is, the conductive valve 310 is disconnected from the negative electrode seat 330, the current loop is disconnected, the signal current of the controller 2000 is lost, and the controller 2000 sends a signal to prompt the user to replace the air suction filter 221.

[0030] In order to further ensure the safe use of the air suspension air supply system 1000, in the case that the bypass valve 300 is disconnected, that is, the contact between the conductive valve 310 and the negative electrode seat 330 is disconnected, causing the controller 2000 to lose the signal current, the controller 2000 also sends a control instruction to lock the air supply circuit 100 to perform a dryer 172 regeneration operation based on external air supplement. That is, the air supply circuit 100 no longer supplements air through the air supplement pipeline 200.

[0031] Of course, the bypass valve 300 structure can also adopt other structure forms, as long as it can ensure that in the case that the air filter 221 is blocked, the state of the bypass valve 300 structure is changed to output a blockage signal, and the specific structure adopted is not limited here.

[0032] The controller 2000 in the embodiment can be a control system of the vehicle system, or an additional controller 2000 can be provided, which is electrically connected with the control system of the vehicle system, and the limitation is not made here.

[0033] Please continue to refer to Figure 1 and Figure 2 The air supply circuit 100 in the embodiment includes a compressor 110, a first switching valve 120, a second switching valve 130, an exhaust valve 141, an air tank 150, a gas supply valve body group 160, and a dryer regeneration pipeline 170; the gas supply valve body group 160 is used to communicate with a plurality of air springs 400 one by one to control the air springs 400 to inflate or deflate each wheel of the vehicle; the outlet end of the compressor 110 communicates with one end of the dryer regeneration pipeline 170, and the other end of the dryer regeneration pipeline 170 communicates with the gas supply valve body group 160; the second switching valve 130 is arranged between the dryer regeneration pipeline 170 and the gas supply valve body group 160; the air tank 150 is connected between the second switching valve 130 and the dryer regeneration pipeline 170; the inlet end of the compressor 110 communicates with the gas supply valve body group 160, and the first switching valve 120 is arranged between the inlet end of the compressor 110 and the gas supply valve body group 160; the first exhaust pipeline 140 is arranged between the dryer regeneration pipeline 170 and the outlet end of the compressor 110, and is used to communicate with external air; the exhaust valve 141 is arranged on the first exhaust pipeline 140. Through the above design, when the system is exhausted, the wet air is forced to pass through the dryer 172, the moisture is adsorbed, and the dried air is discharged. This process simultaneously completes the "regeneration" preparation of the dryer 172. In the next air supplement cycle, the high-temperature and dry air at the outlet of the compressor 110 will pass through the dryer 172 in reverse, take away the moisture absorbed by the dryer 172, and discharge the system, thereby restoring the moisture absorption capacity of the dryer 172. To ensure that the air entering the air springs 400 and the air tank 150 is always dry, effectively prevent internal components from corroding, thereby prolonging the service life of the entire system.

[0034] The air supply valve body group 160 in the embodiment includes a plurality of air spring valves 161 connected in parallel. Specifically, the air supply valve body group 160 in the embodiment includes four air spring valves 161. The air supply circuit 100 in the embodiment also includes a temperature and pressure sensor 190 configured to acquire the temperature and humidity of the air entering the air spring 400 to determine the system start mode.

[0035] To improve the exhaust efficiency, please refer to Figure 1 and Figure 2 The air supply circuit 100 in the embodiment also includes a second exhaust pipeline 180 connected in parallel with the desiccant regeneration pipeline 170. The second exhaust pipeline 180 is arranged between the outlet end of the compressor 110 and the second switching valve 130. The second exhaust pipeline 180 is provided with a third switching valve 181. In the case of emergency exhaust, the second switching valve 130, the third switching valve 181, and the exhaust valve 141 are opened. The gas discharged through the air supply valve body group 160 directly passes through the second exhaust pipeline 180 and the first exhaust pipeline 140 to be discharged to the outside, without passing through the desiccant regeneration pipeline 170, so as to improve the exhaust speed.

[0036] In addition, in the case that the air suspension air supply system 1000 does not need to be supplied with air from the outside, the third switching valve 181 is opened, and the second switching valve 130 is closed. The gas of the air supply circuit 100 no longer passes through the desiccant regeneration pipeline 170, i.e., no longer passes through the desiccator 172, thereby effectively avoiding the water adsorbed by the desiccator 172 from entering the system again when the dew point is approached.

[0037] Please continue to refer to Figure 1 and Figure 2 Specifically, the desiccant regeneration pipeline 170 in the embodiment is sequentially provided with a fourth switching valve 171, a desiccator 172, a regeneration injection hole 173, a one-way valve 174, and a fifth switching valve 175 along the direction from the outlet end of the compressor 110 to the second switching valve 130. The regeneration injection hole 173 is connected in parallel with the one-way valve 174. In the case that the air suspension air supply system 1000 is in the desiccant regeneration mode, the first switching valve 120 and the air supply valve body group 160 are opened, the compressor 110 is operated, and the fourth switching valve 171 is closed to inject the air in the plurality of air springs 400 into the gas storage tank 150. After the air spring 400 is lowered to a preset height, the fifth switching valve 175 and the exhaust valve 141 are opened, and the remaining switching valves are closed to discharge the gas in the gas storage tank 150 through the desiccant regeneration pipeline 170 and the first exhaust pipeline 140.

[0038] In order to improve the effect of discharging the moisture in the interior of the dryer 172, after the air spring 400 in the embodiment is lowered to a preset height, the fifth switch valve 175 is opened and closed at a preset frequency to impact the dryer 172 with the gas in the gas storage tank 150 in a pulse jet manner. For example, the fifth switch valve 175 is opened and closed at a frequency of 5 Hz, and the preset frequency can be adjusted according to actual conditions and is not limited herein. The pulse impact manner forms intermittent impact in the molecular sieve in the dryer 172, the molecular sieve is pulsed and oscillated, the pulse jet is sprayed to a more comprehensive position on the molecular sieve, and the effect of discharging the moisture is better than that of the stable jet.

[0039] Of course, the desiccant regeneration pipeline 170 can also be provided in other structural forms, which are not limited herein.

[0040] When the system needs to be supplemented with air because it has not been used for a long time or because the ambient temperature is too low, or when the system has a slight leakage, the system needs to be supplemented with air. When the air suspension air supply system 1000 is in the external air supplement mode, the first switch valve 120 is closed, the compressor 110 is started, the compressor 110 sucks air through the air suction filter 221 and the air suction check valve 231; at the same time, the fourth switch valve 171 and the fifth switch valve 175 are opened, the third switch valve 181 remains closed, and the compressed gas enters the dryer 172 and then enters the gas storage tank 150 to ensure that the gas in the system is dry. Only when the first switch valve 120 and any one of the air spring valves 161 in the air supply valve body group 160 are powered on and opened, at this time, the system is in internal circulation, and no external air supplement is performed, otherwise, it is considered that the system is supplemented with air from the outside.

[0041] In addition, the embodiment of the present application also provides an air supply control method applied to the air suspension air supply system 1000 described above, and the air supply control method comprises the following steps. Obtaining state information of the bypass valve 300; The bypass valve 300 is used to form a current loop with the controller 2000; when the bypass valve 300 is disconnected, the current loop is disconnected, and the controller 2000 loses the current signal; when the bypass valve 300 is connected, the current loop is connected, and the controller 2000 can detect the current signal.

[0042] According to the state information of the bypass valve 300, it is judged whether the air suction filter 221 is blocked.

[0043] Specifically, when the air suction filter 221 is blocked or reaches a preset air suction resistance, the bypass valve 300 is disconnected, causing the controller 2000 to lose the signal current, and the controller 2000 sends a signal to prompt replacement of the air suction filter 221.

[0044] In addition, when the bypass valve 300 is in a target state, the controller 2000 also sends a control instruction to lock the air supply circuit 100 to perform a desiccant regeneration operation based on external air supplement. The target state is a state in which the controller 2000 loses signal current due to the disconnection of the bypass valve 300. When the bypass valve 300 is disconnected, it means that the air intake filter 221 is invalid, and at this time, the desiccant regeneration is prohibited to be started by opening the exhaust valve 141 to avoid the system from being unable to supplement air after exhaust.

[0045] That is, the opening and closing of the bypass valve 300 causes the circuit to be connected and disconnected, causing the electrical signal to be connected and disconnected, and the disconnection of the electrical signal can enable the vehicle to identify the failure of the air filter and prompt the customer to replace it.

[0046] According to the air suspension air supply system 1000 provided by the embodiment, the working principle of the air suspension air supply system 1000 is as follows: When the air suspension air supply system 1000 causes the air intake filter 221 to be blocked or reach a preset air intake resistance during multiple air supplement, the bypass valve 300 is disconnected, causing the controller 2000 to lose signal current, and the controller 2000 sends a signal to prompt the replacement of the air intake filter 221. At the same time, when the bypass valve 300 is in a disconnected state, causing the controller 2000 to lose signal current, the controller 2000 also sends a control instruction to lock the air supply circuit 100 to perform a desiccant regeneration operation based on external air supplement.

[0047] When the air suspension air supply system 1000 is in a suspension lifting mode, the initial pressure energy of the gas tank 150 can meet the requirement that multiple air suspension air bags are lifted from the lowest position to the highest position at a specified rate. When the air spring 400 air bag needs to be lifted, the second switch valve 130 and the air spring valve 161 corresponding to the air bag of the air spring 400 that needs to be lifted are opened, the gas in the gas tank 150 enters the air bag corresponding to the air spring 400, and the air spring 400 drives the air suspension to rise; When the air suspension air supply system 1000 is in a suspension lowering mode, the air suspension needs to be lowered, the air bag of the air spring 400 needs to be deflated, the corresponding air spring valve 161 is opened, the first switch valve 120 is opened, the compressor 110 is started, and the third switch valve 181 is opened. The compressor 110 extracts the gas in the air bag of the air spring 400 without passing through the air dryer 172, and enters the gas tank 150 through the second exhaust pipeline 180 to complete the lowering of the air spring 400. During this process, the fourth switch valve 171 and the fifth switch valve 175 are in a closed state, which can ensure that the gas circulating in the air suspension air supply system 1000 does not contact the air dryer 172 to improve the lowering rate; When the air suspension air supply system 1000 is in the external air supplement mode, the first switch valve 120 is closed, the compressor 110 is started, and the compressor 110 sucks in air through the air suction filter 221 and the air suction check valve 231; at the same time, the fourth switch valve 171 and the fifth switch valve 175 are opened, and the third switch valve 181 remains closed, so that the compressed gas enters the dryer 172 and then enters the air tank 150, to ensure that the air in the system is dry; When the air suspension air supply system 1000 is in the desiccant regeneration mode, the first switch valve 120 is opened, the air supply valve body group 160 is opened, the compressor 110 is started, the fourth switch valve 171 is closed, and the third switch valve 181 is opened, so that the air in the air bags of the plurality of air springs 400 is injected into the air tank 150, and a high-temperature and high-pressure state is formed in the air tank 150. When the air bag of the air spring 400 drops to a preset height, only the exhaust valve 141 is opened, and the fifth switch valve 175 is opened and closed in pulse mode according to a preset frequency, so that the gas in the air tank 150 impacts the dryer 172 in a pulse jet mode, and then the moisture in the dryer 172 is discharged; When the air suspension air supply system 1000 is in the emergency exhaust mode, the second switch valve 130, the third switch valve 181, the fourth switch valve 171, and the exhaust valve 141 are opened, the gas in the air bag of the air spring 400 sequentially passes through the second switch valve 130, the third switch valve 181, the fourth switch valve 171, and the exhaust valve 141, and is discharged through the first exhaust pipeline 140, without passing through the regeneration injection hole 173 and the regeneration dryer 172, so that the exhaust resistance is smaller and the exhaust efficiency is higher.

[0048] In summary, the air suspension air supply system 1000 includes the air supply circuit 100 and the air supplement pipeline 200. The air supply circuit 100 is used to inflate or deflate the air spring 400 on the wheel. The air supplement pipeline 200 includes the air inlet pipeline 210, the parallel pipeline 220, and the air outlet pipeline 230 that are sequentially connected. The parallel pipeline 220 includes the air suction filter 221 and the bypass valve 300 that are arranged in parallel. The air outlet pipeline 230 is connected with the air supply circuit 100. The air suction check valve 231 is arranged on the air outlet pipeline 230. The bypass valve 300 is used to output a signal indicating whether the air suction filter 221 is blocked. By arranging the bypass valve 300 beside the air suction filter 221, the air suspension air supply system 1000 can be prevented from being blocked, and the system can be supplemented in an emergency. In addition, by arranging the bypass valve 300, the opening and closing of the bypass valve 300 can also be used to determine whether the air suction filter 221 is blocked in real time, to prompt the user to replace the air suction filter 221.

[0049] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An air suspension air supply system, characterized in that, include: An air supply circuit (100) is used to inflate or deflate the air springs (400) on the wheels; The air supply line (200) includes an air inlet line (210), a parallel line (220), and an air outlet line (230) connected in sequence. The parallel line (220) includes an air intake filter (221) and a bypass valve (300) connected in parallel. The air outlet line (230) is connected to the air supply circuit (100). An air intake check valve (231) is provided on the air outlet line (230). The bypass valve (300) is used to output a signal indicating whether the intake filter (221) is blocked.

2. The air suspension air supply system according to claim 1, characterized in that, The bypass valve (300) includes a conductive spring (340) and a conductive valve (310); one end of the conductive spring (340) is connected to the conductive valve (310), and the other end of the conductive spring (340) is used to connect to the positive terminal of the controller (2000); the side of the conductive valve (310) away from the conductive spring (340) is used to connect to the negative terminal of the controller (2000) to form a current loop.

3. The air suspension air supply system according to claim 1, characterized in that, The air supply circuit (100) includes a compressor (110), a first switching valve (120), a second switching valve (130), an exhaust valve (141), an air tank (150), an air supply valve assembly (160), and a desiccant regeneration pipeline (170); the air supply valve assembly (160) is used to connect one-to-one with multiple air springs (400) to control the air springs (400) to inflate or deflate each wheel of the vehicle; The outlet end of the compressor (110) is connected to one end of the desiccant regeneration pipeline (170), and the other end of the desiccant regeneration pipeline (170) is connected to the gas supply valve body assembly (160); a second switching valve (130) is provided between the desiccant regeneration pipeline (170) and the gas supply valve body assembly (160); the gas storage tank (150) is connected between the second switching valve (130) and the desiccant regeneration pipeline (170); the inlet end of the compressor (110) is connected to the gas supply valve body assembly (160), and a first switching valve (120) is provided between the inlet end of the compressor (110) and the gas supply valve body assembly (160). A first exhaust pipe (140) is provided between the desiccant regeneration pipeline (170) and the outlet end of the compressor (110). The first exhaust pipe (140) is used to connect to the outside air, and the exhaust valve (141) is provided on the first exhaust pipe (140).

4. The air suspension air supply system according to claim 3, characterized in that, The gas supply circuit (100) also includes a second exhaust pipe (180), which is connected in parallel with the desiccant regeneration pipe (170). The second exhaust pipe (180) is located between the outlet end of the compressor (110) and the second switching valve (130). A third switching valve (181) is provided on the second exhaust pipe (180). In the event of an emergency venting situation, the second switching valve (130), the third switching valve (181), and the venting valve (141) are opened, and the gas is discharged through the gas supply valve body assembly (160) and directly through the second venting pipe (180) and the first venting pipe (140) to the outside, without having to pass through the desiccant regeneration pipe (170).

5. The air suspension air supply system according to claim 4, characterized in that, When the air suspension air supply system (1000) does not need to be replenished with air from the outside, the third switching valve (181) is opened and the second switching valve (130) is closed, and the gas in the air supply circuit (100) no longer passes through the desiccant regeneration pipeline (170).

6. The air suspension air supply system according to any one of claims 3-5, characterized in that, The desiccant regeneration pipeline (170) is provided with a fourth switching valve (171), a dryer (172), a regeneration injection port (173), a one-way valve (174) and a fifth switching valve (175) in sequence along the direction from the outlet end of the compressor (110) to the second switching valve (130); the regeneration injection port (173) is connected in parallel with the one-way valve (174).

7. The air suspension air supply system according to claim 6, characterized in that, After the air spring (400) descends to a preset height, the fifth switching valve (175) pulses open and closes at a preset frequency to impinge the gas in the gas storage tank (150) onto the dryer (172) in a pulse jet manner.

8. An air supply control method, applied to the air suspension air supply system (1000) as described in claim 1, characterized in that: The gas supply control method includes: Obtain the status information of the bypass valve (300); Based on the status information of the bypass valve (300), determine whether the intake filter (221) is blocked.

9. The gas supply control method according to claim 8, characterized in that, The bypass valve (300) is used to form a current loop with the controller (2000); The step of determining whether the intake filter (221) is blocked based on the status information of the bypass valve (300) includes: If the intake filter (221) becomes clogged or reaches the preset intake resistance, the bypass valve (300) disconnects, causing the controller (2000) to lose signal current. The controller (2000) then sends a signal to prompt the replacement of the intake filter (221).

10. The gas supply control method according to claim 9, characterized in that, When the bypass valve (300) is in the target state, the controller (2000) also issues a control command to lock the gas supply circuit (100) to perform desiccant regeneration operation based on external gas supply; the target state is the state in which the controller (2000) loses signal current due to the disconnection of the bypass valve (300).

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