A new air suspension control system

Abstract

The utility model discloses a novel air suspension control system, including gas supply valve body unit, air filter drier, air receiver and a plurality of air springs, and gas supply valve body unit has integrated first air port, second air port, a plurality of third air port and reversing valve group, and reversing valve group contains first reversing valve and second reversing valve of series connection, and the both sides have high pressure drier and check valve b that are connected in proper order between, and the both ends of check valve b have throttle hole b in parallel, air filter drier is communicated with first air port through inlet and exhaust mouth, and air receiver is communicated with second air port, and each air spring is connected with a third air port, and gas supply valve body unit still includes exhaust valve, the beneficial effects of the utility model are: this technical scheme integrates high pressure drier, check valve and throttle hole between air receiver and air pump, forms the composite gas path of " double -stage drying + pressure balance", solves the problem that traditional system is not completely dried, and air path is easy to be choked pressure.

Description

Technical Field

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

[0002] Air suspension systems, which dynamically adjust vehicle height by inflating and deflating air springs, have become a key technology for improving vehicle comfort and handling. However, existing technologies still have the following prominent problems in practical applications: Traditional systems often use a single dryer integrated inside the air supply valve unit. Due to limited installation space, the desiccant capacity is small, and it is prone to rapid saturation in high humidity environments, leading to residual moisture in the compressed air and causing rust on the inner wall of the air tank and aging of valve body seals. For example, due to incomplete drying, the air suspension system of a certain commercial vehicle frequently experienced air circuit icing and blockage in environments below -10℃, with a failure rate as high as 28%. In addition, the integrated design of the dryer and valve body unit requires disassembling the entire valve body to replace the desiccant, increasing maintenance time by more than three times. In existing technologies, the intake and exhaust pipes are set up independently and need to be connected to different ports of the valve body unit, resulting in an increase of more than 40% in the number of pipes in the entire vehicle. Taking a certain SUV model as an example, the total length of the air suspension system pipes exceeds 8 meters, with 12 pipe joints, which not only increases assembly time but also increases the risk of leakage. Meanwhile, the integrated module of the dryer and valve body is relatively large (usually exceeding 3L), making it difficult to adapt to the compact space layout of new energy vehicle chassis and limiting the platform application of the system. During the air spring inflation and deflation process, the instantaneous pressure difference between the air tank and the air pump can reach 0.6MPa. Traditional systems only use a one-way valve for simple flow control, which easily causes sudden changes in airflow (fluctuation amplitude exceeding ±20%). Test data shows that when the vehicle switches from full load to no load, the overshoot of the vehicle height adjustment reaches 35mm, requiring secondary correction to meet accuracy requirements. In addition, the one-way valve is prone to local pressure buildup when closed, resulting in an increase of 15dB(A) in pipeline vibration noise. In the existing system, the dryer can only achieve unidirectional drying of the intake air, and the high-pressure gas is directly discharged to the outside during the exhaust stage, without utilizing its drying characteristics to backflush and regenerate the desiccant. Experiments show that the moisture absorption capacity of traditional dryers decreases by 60% after 50 hours of cumulative operation, requiring forced replacement. At the same time, impurities trapped by the intake filter cannot be removed through the exhaust, causing the intake resistance to increase linearly with the use time, and the power consumption of the air pump to increase by 25%.

[0003] Therefore, this application proposes an air suspension control system that integrates two-stage drying, pressure balancing, and modular design. By innovating the air circuit structure and control logic, it solves the pain points of incomplete drying, complex pipelines, pressure fluctuations, and high maintenance costs in the prior art, thereby improving the reliability and economy of the system under all operating conditions. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a novel air suspension control system, which solves one or more of the above-mentioned problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a novel air suspension control system, the innovation of which is: including an air supply valve body unit, an air filter dryer, an air tank, and multiple air springs; the air supply valve body unit integrates a first air port, a second air port, multiple third air ports, and a reversing valve group; the reversing valve group includes a first reversing valve and a second reversing valve arranged in series, and a high-pressure dryer and a one-way valve b are connected sequentially between them; the two ends of the one-way valve b are connected in parallel with throttling orifices b; the air filter dryer is connected to the first air port through an inlet and outlet nozzle; the air tank is connected to the second air port; each air spring is connected to one of the third air ports; the air supply valve body unit also includes an exhaust valve, the output end of which is directly connected to the atmosphere;

[0006] The system achieves multi-state operation through valve switching of the reversing valve group:

[0007] Inhalation state: The first ventilation port and the second ventilation port are connected, and the third ventilation port is closed. After the outside air is filtered and dried by the air filter dryer, it is compressed into the air storage tank through the air supply valve body unit.

[0008] Suspended and raised state: The second ventilation port and the third ventilation port are connected, the first ventilation port is closed, and the gas in the gas tank is filled into the air spring through the gas supply valve body unit;

[0009] Suspended descent state: The second ventilation port and the third ventilation port are connected, the first ventilation port is closed, and the gas in the air spring flows back to the air storage tank through the air supply valve unit;

[0010] Exhaust status: The first vent port and the third vent port are connected, and the second vent port is closed. The gas in the air spring is directly discharged to the atmosphere through the exhaust valve.

[0011] In some embodiments, the air supply valve body unit further includes an air supply valve group, a safety valve, a sensor, and a motor-driven air pump. The air supply valve group includes four two-position two-way solenoid valves, which respectively control the air passage opening and closing of the four air springs. The sensor is a pressure sensor or a temperature sensor, which is installed on the pipeline between the air supply valve group and the reversing valve group.

[0012] In some embodiments, the reversing valve assembly further includes a third reversing valve and a fourth reversing valve, both of which are two-position two-way solenoid valves; the input end of the first reversing valve is connected to the air storage tank, and the output end is connected to the air outlet of the air pump; the input end of the second reversing valve is connected to the air storage tank, and the output end is connected to the air inlet of the air pump through the high-pressure dryer and the one-way valve b; the third reversing valve and the fourth reversing valve respectively control the air path switching between the air spring and the air storage tank.

[0013] In some embodiments, the air filter dryer includes a silencing component, a filtering component, and a drying component connected in sequence. The silencing component is provided with the air inlet and outlet ports, the drying component is provided with the air inlet and outlet nozzles, and a two-way valve is provided between the silencing component and the filtering component to block the gas flow in the non-operating state.

[0014] In some embodiments, the air filter dryer is connected to the gas supply valve body unit via a one-way valve a, which restricts gas flow only from the air filter dryer to the gas supply valve body unit.

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

[0016] Improved structural integration: The high-pressure dryer, one-way valve, and throttle orifice are integrated between the air tank and the air pump to form a composite air path of "two-stage drying + pressure balance", which solves the problems of incomplete drying and easy pressure build-up in the air path in traditional systems.

[0017] Control logic optimization: Through the coordinated switching of the reversing valve group, the newly added components can be automatically connected or disconnected under different operating conditions without the need for an additional control unit;

[0018] Extended lifespan design: The reverse conduction function of the one-way valve a, combined with the backflush path of the air filter dryer, enables online regeneration of the desiccant and filter element, extending the maintenance cycle by more than 50% compared to traditional systems. 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 a novel 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, this utility model embodiment includes: a novel air suspension control system, which mainly consists of an air supply valve body unit 100, an air filter dryer 200, an air tank 300, an air spring 400, a high-pressure dryer 500, a one-way valve a 600, a one-way valve b 700, and a throttle orifice b 800. The components form a closed-loop air circuit system through pipelines or internal channels of the valve body unit. The specific connection relationships are as follows:

[0023] Air supply valve body unit 100: As the core control module of the system, it integrates a first air port 101 (inlet and outlet), a second air port 102 (air tank interface), a third air port 103 (air spring interface), a reversing valve group consisting of a first reversing valve 121, a second reversing valve 122, a third reversing valve 123, and a fourth reversing valve 124, an air supply valve group 110 (including 4 two-position two-way solenoid valves), an air pump 170, a safety valve 130, an exhaust valve 140, and a sensor 150 (pressure / temperature sensor).

[0024] High-pressure dryer 500: connected in series between the first reversing valve 121 and the second reversing valve 122, filled with molecular sieve desiccant (such as 4A molecular sieve), with a working pressure range of 0.8-1.2MPa, used for secondary deep drying of the gas output from the gas storage tank 300.

[0025] One-way valve b 700: connected in series between the high-pressure dryer 500 and the second directional valve 122, allowing gas to flow only from the high-pressure dryer 500 to the second directional valve 122.

[0026] Throttling orifice b 800: orifice diameter 0.5-2mm, connected in parallel to both ends of check valve b 700, used to allow a small amount of gas to flow when check valve b 700 is closed, to balance the pressure on both sides of high pressure dryer 500 and avoid gas pressure buildup.

[0027] One-way valve a 600: Replaces the original one-way valve and is installed between the air filter dryer 200 and the air pump 170 inlet to prevent gas from flowing back into the dryer.

[0028] The air filter dryer 200 is connected to the first vent port 101 through the inlet and outlet nozzles 201. Inside, a sound-absorbing component 210 (containing sound-absorbing cotton), a filter component 220 (containing activated carbon filter element), and a drying component 230 (containing silica gel desiccant) are arranged in sequence, and the air passage is controlled by a two-way valve 240. The air tank 300 is connected to the inlet end of the first reversing valve 121 through the second vent port 102. Four air springs 400 (corresponding to the four wheels of the vehicle) are connected to the third vent port 103 one by one through the air supply valve group 110.

[0029] This system achieves four operating states by switching the solenoid valves of the directional valve group, as follows:

[0030] 1. Inhalation state (system air replenishment)

[0031] Valve status: First reversing valve 121 and fourth reversing valve 124 are energized and open; second reversing valve 122, third reversing valve 123, air supply valve group 110, and exhaust valve 140 are de-energized and closed.

[0032] Gas flow direction: outside air → inlet and outlet port 202 → silencer 210 (noise reduction) → filter 220 (impurity removal) → dryer 230 (preliminary drying) → inlet and outlet nozzle 201 → one-way valve a 600 → air pump 170 → fourth reversing valve 124 → first reversing valve 121 → air tank 300;

[0033] At this time, the high-pressure dryer 500 is not connected to the gas line, the one-way valve b 700 is closed due to the lack of gas pressure upstream, and there is no gas flow through the throttle orifice b 800.

[0034] 2. Air suspension raised (vehicle body raised)

[0035] Valve status: Second directional valve 122, fourth directional valve 124, and air supply valve group 110 are energized and open; first directional valve 121, third directional valve 123, and exhaust valve 140 are de-energized and closed.

[0036] Gas flow direction: Gas storage tank 300 → First reversing valve 121 → High pressure dryer 500 (secondary drying) → One-way valve b700 (main passage) / throttle orifice b800 (micro bypass) → Second reversing valve 122 → Air pump 170 → Fourth reversing valve 124 → Gas supply valve group 110 → Air spring 400.

[0037] The high-pressure dryer 500 further dries the gas in the storage tank to prevent moisture from entering the air spring; the one-way valve b 700 ensures that the gas flows unidirectionally to the air spring, and the throttle orifice b 800 balances the pressure difference on both sides of the high-pressure dryer by venting a small amount of gas when the gas pressure rises suddenly.

[0038] 3. Suspension and descent (vehicle body lowered)

[0039] Valve status: First reversing valve 121, third reversing valve 123, and air supply valve group 110 are energized and open; second reversing valve 122, fourth reversing valve 124, and exhaust valve 140 are de-energized and closed.

[0040] Gas flow direction: air spring 400 → air supply valve group 110 → third reversing valve 123 → air pump 170 → first reversing valve 121 → air storage tank 300;

[0041] The high-pressure dryer 500 and the one-way valve b 700 are not connected to the gas line at this time. The gas is pumped back to the storage tank in reverse to achieve energy recovery.

[0042] 4. Exhaust status (system depressurization)

[0043] Valve status: Third directional valve 123, fourth directional valve 124, air supply valve group 110, and exhaust valve 140 are energized and open; first directional valve 121 and second directional valve 122 are de-energized and closed.

[0044] Gas flow direction: air spring 400 → air supply valve group 110 → third reversing valve 123 → air pump 170 → exhaust valve 140 → one-way valve a 600 (reverse conduction) → drying component 230 (backflush desiccant regeneration) → filter component 220 (backflush filter element impurities) → silencer component 210 (noise reduction) → inlet and outlet port 202 → outside;

[0045] The one-way valve a 600 allows gas to flow in reverse through the air filter dryer, enabling backflushing cleaning of the desiccant and filter element, and extending their service life.

[0046] High-pressure dryer 500: volume 50-100mL, molecular sieve filling amount 30-50g, working temperature -40℃~120℃, drying efficiency ≥95% (dew point ≤-40℃);

[0047] One-way valves a / b: Both are spring-loaded one-way valves, with an opening pressure of 0.05-0.1MPa and a withstand pressure of ≥2MPa;

[0048] Orifice b 800: The orifice diameter is preferably 1mm, and the material is stainless steel. It is used to limit the bypass flow rate to ≤5L / min (@0.5MPa pressure difference).

[0049] The advantages of this technical solution are:

[0050] Improved structural integration: The high-pressure dryer, one-way valve, and throttle orifice are integrated between the air tank and the air pump to form a composite air path of "two-stage drying + pressure balance", which solves the problems of incomplete drying and easy pressure build-up in the air path in traditional systems.

[0051] Control logic optimization: Through the coordinated switching of the reversing valve group, the newly added components can be automatically connected or disconnected under different operating conditions without the need for an additional control unit;

[0052] Extended lifespan design: The reverse conduction function of the one-way valve a, combined with the backflush path of the air filter dryer, enables online regeneration of the desiccant and filter element, extending the maintenance cycle by more than 50% compared to traditional systems.

[0053] 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. A novel air suspension control system, characterized in that: The device includes an air supply valve body unit, an air filter dryer, an air tank, and multiple air springs. The air supply valve body unit integrates a first air port, a second air port, multiple third air ports, and a reversing valve group. The reversing valve group includes a first reversing valve and a second reversing valve arranged in series, with a high-pressure dryer and a one-way valve b connected sequentially between them. The two ends of the one-way valve b are connected in parallel with throttling orifices b. The air filter dryer is connected to the first air port through an inlet and outlet nozzle, and the air tank is connected to the second air port. Each air spring is connected to one of the third air ports. The air supply valve body unit also includes an exhaust valve, the output end of which is directly connected to the atmosphere.

2. The novel air suspension control system according to claim 1, characterized in that: The air supply valve body unit also includes an air supply valve group, a safety valve, a sensor, and an air pump driven by a motor. The air supply valve group includes four two-position two-way solenoid valves, which respectively control the air passage opening and closing of the four air springs. The sensor is a pressure sensor or a temperature sensor, which is installed on the pipeline between the air supply valve group and the reversing valve group.

3. A novel air suspension control system according to claim 1 or 2, characterized in that: The reversing valve group also includes a third reversing valve and a fourth reversing valve, both of which are two-position two-way solenoid valves; the input end of the first reversing valve is connected to the air storage tank, and the output end is connected to the air outlet of the air pump; the input end of the second reversing valve is connected to the air storage tank, and the output end is connected to the air inlet of the air pump through the high-pressure dryer and the one-way valve b; the third reversing valve and the fourth reversing valve respectively control the air path switching between the air spring and the air storage tank.

4. The novel air suspension control system according to claim 1, characterized in that: The air filter dryer includes a silencing component, a filtering component, and a drying component connected in sequence. The silencing component is provided with an air inlet and an air outlet, and the drying component is provided with an air inlet and an air outlet. A two-way valve is provided between the silencing component and the filtering component to block the flow of gas when not in operation.

5. A novel air suspension control system according to claim 1, characterized in that: The air filter dryer is connected to the air supply valve unit via a one-way valve a, which restricts gas flow only from the air filter dryer to the air supply valve unit.

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