Integrated air suspension control system

Abstract

The utility model discloses an integrated air suspension control system which comprises an air supply valve body unit, an air filtering dryer, an air storage tank, a plurality of air springs, a high-pressure dryer, a one-way valve b and a silencer. The air supply valve body unit is provided with a first ventilation port, a second ventilation port and a plurality of third ventilation ports, the air filtering dryer is provided with an air inlet and outlet nozzle and an air inlet and outlet hole, the air inlet and outlet nozzle is communicated with the first ventilation port, the air storage tank is communicated with the second ventilation port, and the air springs are connected with the third ventilation ports in a one-to-one correspondence mode. One end of the high-pressure dryer is connected with the first reversing valve and the fourth reversing valve at the same time, and the other end of the high-pressure dryer is connected with the safety valve, the exhaust valve and the air pump in series. The utility model has the beneficial effects that the primary drying of the air filter dryer is combined with the secondary drying of the high-pressure dryer, so as to ensure that the humidity of system gas is less than or equal to-40 DEG C dew point, and avoid corrosion caused by accumulated water in the valve body.

Description

Technical Field

[0001] This utility model relates to the field of vehicle air suspension technology, and in particular to an integrated air suspension control system. Background Technology

[0002] Air suspension systems achieve dynamic adjustment of vehicle height and stiffness through air springs and are widely used in commercial vehicles, passenger vehicles, and special vehicles. Their core function relies on the stability of the air supply unit and the reliability of the air circuit control logic. In existing technologies, air suspension control systems typically consist of an independent air compressor, dryer, air tank, valve assembly, and piping, which suffers from the following technical drawbacks: Traditional systems often use a single-stage dryer (such as an air filter dryer) to process the air source. However, in high-humidity environments or under frequent charging and discharging conditions, a single drying cycle is insufficient to control the gas dew point below -40°C, resulting in moisture residue inside the air tank or valve body, causing problems such as corrosion and icing blockage. For example, drying systems that only adsorb moisture with desiccant are prone to adsorption saturation after long-term use, requiring frequent desiccant replacement and resulting in high maintenance costs. During the air spring exhaust process, high-pressure gas is directly discharged to the outside through the valve body at a flow rate of 30-50 m / s, generating aerodynamic noise exceeding 85 dB (refer to GB / T 25982-2010 "Limits and Measurement Methods for Exterior Noise of Automobiles During Acceleration"). Simultaneously, the lack of a buffer device leads to high-frequency impacts of the airflow on the valve body seals, exacerbating wear on components such as the one-way valve and sealing plates. For example, due to its non-positioning structure, the deformation rate of the one-way valve sealing plate exceeds 15% after long-term use, significantly increasing the risk of seal failure. In existing technologies, valve body assemblies, dryers, sensors, and other components are mostly distributed, requiring complex piping connections, resulting in: ① increased installation space (more than 40% larger than integrated designs); ② increased leakage at pipe joints, reducing system airtightness; ③ independent control of multiple valve bodies requires coordinating the actions of multiple solenoid valves, with response delays exceeding 200 ms, affecting the accuracy of vehicle height adjustment. Traditional air suspension systems require separate valve bodies for intake, inflation / deflation, and exhaust functions. Intake relies on the intake valve, inflation / deflation on the directional control valve, and exhaust on the exhaust valve, resulting in 8-12 valve bodies. Redundant valve bodies not only increase costs but are also prone to malfunctions due to electromagnetic interference or signal delays. For example, if the exhaust valve and directional control valve fail in tandem, it can lead to abnormal gas release from the air tank, causing sudden vehicle subsidence. Existing one-way valves often use a "sealing plate + spring" structure. When the piston returns to its original position, the sealing plate relies on elastic deformation to cover the through-hole. However, the spring is prone to fatigue under high-frequency vibration, causing the sealing plate opening angle to exceed 30° (the design threshold is 15°), leading to gas backflow. For instance, due to a one-way valve backflow problem, the air pump efficiency of a commercial vehicle's air suspension system decreased by 25%, requiring an additional 15% of motor power to compensate.

[0003] To address the aforementioned issues, this invention proposes an integrated air suspension control system. By optimizing the drying process, integrating the valve body unit, improving the exhaust noise reduction structure, and designing a one-way valve, it solves the defects of low reliability, high noise, and insufficient integration in existing technologies, thereby meeting the technical requirements of vehicles for "high efficiency, low noise, and long lifespan" in air suspension systems. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide an integrated air suspension control system, thereby solving one or more of the aforementioned prior art problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an integrated air suspension control system, the innovation of which is: including an air supply valve body unit, an air filter dryer, an air tank, multiple air springs, a high-pressure dryer, a one-way valve b, and a muffler; the air supply valve body unit is provided with a first air inlet port, a second air inlet port, and multiple third air inlets; the air filter dryer is provided with inlet and outlet nozzles and inlet and outlet holes; the inlet and outlet nozzles are connected to the first air inlet port; and the air tank is connected to the second air inlet port. The system is configured such that multiple air springs are connected one-to-one with multiple third ventilation ports; the high-pressure dryer is connected in series between the reversing valve group of the air supply valve body unit and the air output end, with one end connected to both the first and fourth reversing valves, and the other end connected in series with a safety valve, an exhaust valve, and an air pump; the output end of the exhaust valve is connected in series with the one-way valve b and a silencer, and a throttling orifice b is connected in series between the one-way valve b and the first ventilation port; a one-way valve a is provided at the connection node between the air filter dryer and the air path to replace the original one-way valve;

[0006] The system achieves four operating states through valve body switching:

[0007] Inhalation state: Open the first and second air ports and close the third air port. After the outside air is filtered and dried by the air filter dryer, it is dried again by the high-pressure dryer and compressed into the air storage tank.

[0008] Air suspension raised state: The second and third air ports are opened, and the first air port is closed. Gas from the air tank enters the air spring through the high-pressure dryer to raise the vehicle body.

[0009] Air suspension descent state: The second and third air ports are opened, and the first air port is closed. The air spring gas flows back to the air tank to lower the vehicle body.

[0010] Exhaust status: The first and third vent ports are open, and the second vent port is closed. The air spring gas is discharged to the outside through the one-way valve b, the throttle orifice b, the muffler and the air filter dryer in sequence.

[0011] In some embodiments, the air supply valve body unit includes an air supply valve group, a reversing valve group, a safety valve, an exhaust valve, a sensor, and a motor-driven air pump. The air supply valve group contains four independent air supply valves, which respectively control the air passage opening and closing of the four air springs.

[0012] In some implementations, the reversing valve group consists of four two-position two-way solenoid valves. The first and fourth reversing valves control the air input to the high-pressure dryer, and the second and third reversing valves control the air path switching of the air spring.

[0013] In some implementations, the air filter dryer integrates a noise reduction component, a filter component, and a drying component. External air enters the air passage after passing through the noise reduction component, the filter element, and the desiccant in sequence.

[0014] In some implementations, a one-way valve a is positioned between the air filter dryer and the air pump inlet, and the safety valve, to prevent reverse gas flow.

[0015] The beneficial effects of this utility model are:

[0016] Dual drying guarantee: The combination of preliminary drying by the air filter dryer and secondary drying by the high-pressure dryer ensures that the system gas humidity is ≤-40℃ dew point, preventing water accumulation and corrosion inside the valve body.

[0017] Exhaust noise reduction optimization: One-way valve b prevents reverse airflow impact, throttle orifice b controls exhaust speed within 1.2m / s, and muffler reduces exhaust noise from 85dB to below 65dB.

[0018] Modular layout: The high-pressure dryer is set up independently from the original dryer, and different capacity specifications can be selected according to the vehicle model requirements, improving adaptability by 30%. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is a schematic diagram of the principle of an integrated air suspension control system according to this utility model. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown, the embodiment of this utility model includes: the air suspension control system mainly includes an air supply valve body unit 100, an air filter dryer 200, an air tank 300, multiple air springs 400, a high-pressure dryer 500, a one-way valve a 180, a one-way valve b 600, and a muffler 700.

[0023] Air supply valve body unit 100: As the core control module of the system, it integrates air supply valve group 110 (including 4 two-position two-way solenoid valves, corresponding to control 4 air springs), reversing valve group 120 (including the first to fourth reversing valves 121-124, all of which are two-position two-way solenoid valves), safety valve 130, exhaust valve 140, pressure / temperature sensor 150 and air pump 170 driven by motor 160; the valve body unit is provided with a first air inlet port 101 (connected to air filter dryer 200), a second air inlet port 102 (connected to air tank 300) and a third air inlet port 103 (connected to air spring 400).

[0024] High-pressure dryer 500: connected in series between the reversing valve group 120 and the gas output end. Its input end is connected to the output ends of the first reversing valve 121 and the fourth reversing valve 124. Its output end is connected in parallel to the gas outlet end of the air pump 170, the input end of the safety valve 130 and the input end of the exhaust valve 140. It is used to perform secondary drying on the gas entering the gas storage tank or air spring.

[0025] One-way valve b 600 and muffler 700: One-way valve b 600 and muffler 700 are connected in series at the output end of exhaust valve 140. A throttling orifice b 800 is connected in series between one-way valve b 600 and the first vent port 101 to form an independent exhaust branch, which is used to control the exhaust speed and reduce noise.

[0026] One-way valve a 180: Replaces the original one-way valve and is installed at the connection node between the air filter dryer 200's inlet and outlet nozzles 201 and the air pump 170's inlet end, the safety valve 130's output end, and the third air passage of the reversing valve group 120 to prevent gas from flowing backward.

[0027] Main air passage: The air filter dryer 200’s air inlet and outlet nozzles 201 are connected to the air pump 170’s air inlet end and the third air passage of the reversing valve group 120 (the input ends of the second reversing valve 122 and the third reversing valve 123) through the one-way valve a 180; the fourth air passage of the reversing valve group 120 (the output ends of the first reversing valve 121 and the fourth reversing valve 124) is connected in series with the high-pressure dryer 500, and then splits into three paths to the air pump 170’s air outlet end, the safety valve 130 and the exhaust valve 140.

[0028] Exhaust branch: Output end of exhaust valve 140 → one-way valve b 600 → throttle orifice b 800 → muffler 700 → first vent port 101 → air filter dryer 200 inlet and outlet nozzles 201, forming an independent noise reduction exhaust path.

[0029] The working process of this technical solution is as follows:

[0030] Inhalation state:

[0031] Valve body switching: The first reversing valve 121 and the fourth reversing valve 124 are energized and opened, while the second reversing valve 122, the third reversing valve 123, the air supply valve group 110 and the exhaust valve 140 are de-energized and closed.

[0032] Gas flow direction: External air is drawn in through the air filter dryer 200's inlet and outlet ports 202, and passes sequentially through the silencer (noise reduction), filter element (filtering impurities), desiccant (preliminary drying) → one-way valve a 180 → air pump 170 → high-pressure dryer 500 (secondary drying) → first reversing valve 121 → air tank 300, completing the air replenishment.

[0033] Suspended and raised state:

[0034] Valve body switching: The second reversing valve 122, the fourth reversing valve 124 and the air supply valve group 110 are energized and opened, while the first reversing valve 121, the third reversing valve 123 and the exhaust valve 140 are de-energized and closed.

[0035] Gas flow direction: gas storage tank 300 → second reversing valve 122 → air pump 170 → high pressure dryer 500 → fourth reversing valve 124 → gas supply valve group 110 → air spring 400, gas filling causes the spring to rise.

[0036] Suspended descent state:

[0037] Valve body switching: The first reversing valve 121, the third reversing valve 123 and the air supply valve group 110 are energized and opened, while the second reversing valve 122, the fourth reversing valve 124 and the exhaust valve 140 are de-energized and closed.

[0038] Gas flow direction: air spring 400 → air supply valve group 110 → third reversing valve 123 → air pump 170 → high pressure dryer 500 → first reversing valve 121 → air tank 300, gas recovery causes the spring to lower.

[0039] Exhaust status:

[0040] Valve body switching: The third reversing valve 123, the fourth reversing valve 124, the air supply valve group 110 and the exhaust valve 140 are energized and opened, while the first reversing valve 121 and the second reversing valve 122 are de-energized and closed.

[0041] Gas flow direction: air spring 400 → air supply valve group 110 → third reversing valve 123 → fourth reversing valve 124 → exhaust valve 140 → one-way valve b 600 → throttle orifice b 800 (flow restriction) → silencer 700 (noise reduction) → first ventilation port 101 → air filter dryer 200 (regenerated by desiccant backflushing) → inlet and outlet ports 202 to the outside.

[0042] The advantages of this technical solution are: dual drying protection: the combination of preliminary drying by the air filter dryer 200 and secondary drying by the high-pressure dryer 500 ensures that the system gas humidity is ≤-40℃ dew point, and avoids water accumulation and corrosion inside the valve body.

[0043] Exhaust noise reduction optimization: One-way valve b 600 prevents reverse airflow impact, throttle orifice b 800 controls exhaust speed within 1.2m / s, and muffler 700 reduces exhaust noise from 85dB to below 65dB.

[0044] Modular layout: The high-pressure dryer 500 is set up independently from the original dryer, and different capacity specifications can be selected according to the needs of the vehicle model, improving adaptability by 30%.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An integrated air suspension control system, characterized in that: The system includes an air supply valve body unit, an air filter dryer, an air tank, multiple air springs, a high-pressure dryer, a one-way valve b, and a silencer. The air supply valve body unit has a first air port, a second air port, and multiple third air ports. The air filter dryer has inlet and outlet nozzles and inlet and outlet holes. The inlet and outlet nozzles are connected to the first air port, and the air tank is connected to the second air port. The multiple air springs are connected to the multiple third air ports one by one. The high-pressure dryer is connected in series between the reversing valve group of the air supply valve body unit and the air path output end. One end of the high-pressure dryer is connected to both the first and fourth reversing valves, and the other end is connected in series with a safety valve, an exhaust valve, and an air pump. The output end of the exhaust valve is connected in series with the one-way valve b and the silencer, and a throttling orifice b is connected in series between the one-way valve b and the first air port. A one-way valve a is provided at the connection node between the air filter dryer and the air path. The system achieves four operating states through valve body switching: Inhalation state: Open the first and second air ports and close the third air port. After the outside air is filtered and dried by the air filter dryer, it is dried again by the high-pressure dryer and compressed into the air storage tank. Air suspension raised state: The second and third air ports are opened, and the first air port is closed. Gas from the air tank enters the air spring through the high-pressure dryer to raise the vehicle body. Air suspension descent state: The second and third air ports are opened, and the first air port is closed. The air spring gas flows back to the air tank to lower the vehicle body. Exhaust status: The first and third vent ports are open, and the second vent port is closed. The air spring gas is discharged to the outside through the one-way valve b, the throttle orifice b, the muffler and the air filter dryer in sequence.

2. The integrated air suspension control system according to claim 1, characterized in that: The air supply valve body unit includes an air supply valve group, a reversing valve group, a safety valve, an exhaust valve, a sensor, and a motor-driven air pump. The air supply valve group contains four independent air supply valves, which control the air passage opening and closing of the four air springs respectively.

3. An integrated air suspension control system according to claim 2, characterized in that: The reversing valve group consists of four two-position two-way solenoid valves. The first and fourth reversing valves control the air input of the high-pressure dryer, and the second and third reversing valves control the air path switching of the air spring.

4. The integrated air suspension control system according to claim 1, characterized in that: The air filter dryer integrates a noise reduction component, a filter component, and a drying component. External air enters the air passage after passing through the noise reduction component, the filter element, and the desiccant in sequence.

5. An integrated air suspension control system according to claim 1, characterized in that: The one-way valve a is located between the air filter dryer and the air pump inlet and safety valve to prevent gas from flowing backward.

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