A vehicle air path system with a liftgate

Abstract

The utility model relates to a kind of vehicle gas path systems with lifting bridge, including gas storage device and lifting bridge control device, the lifting bridge control device includes lifting air bag, load-bearing air bag, first solenoid valve, second solenoid valve and first load sensing valve;The lifting air bag is connected the gas storage device by the first solenoid valve;The air inlet end of the first load sensing valve is connected the gas storage device, the air outlet end of the first load sensing valve is connected the load-bearing air bag, and the control end of the first load sensing valve is connected the gas storage device by the second solenoid valve;The utility model can determine load-bearing air bag inflation air pressure according to rear axle load state by setting first load sensing valve control load-bearing air bag inflation, to control lifting bridge carrying capacity in real time, so that the inflation air pressure of load-bearing air bag is kept in suitable state.

Description

Technical Field

[0001] This utility model relates to the technical field of air suspension, specifically to a vehicle air circuit system with a lift bridge. Background Technology

[0002] A lift axle is a type of axle that can be raised. Vehicles equipped with lift axles can raise the axle when unloaded or on poor road surfaces, thereby reducing tire wear, fuel consumption, and improving the vehicle's passability on rough roads. When fully loaded, the axle does not raise, which can increase the vehicle's carrying capacity and improve the overall vehicle's operating economy.

[0003] The greater the vehicle load, the greater the load-bearing capacity required by the lift axle. If the load-bearing capacity of the lift axle can be adjusted in real time according to the vehicle load, the lift axle can be kept in a suitable working state. However, conventional lift axle control systems are relatively simple and cannot control the axle status in real time according to the vehicle load, which is detrimental to the vehicle's power, economy, and ease of operation. Utility Model Content

[0004] Based on the above description, this utility model provides a vehicle air circuit system with a lift axle. By setting a first load sensing valve to control the inflation of the load-bearing airbag, the inflation pressure of the load-bearing airbag can be determined according to the rear axle load status, thereby controlling the load-bearing capacity of the lift axle in real time and keeping the inflation pressure of the load-bearing airbag in a suitable state.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A vehicle air circuit system with a lift axle includes an air storage device and a lift axle control device. The lift axle control device includes a lift airbag, a load-bearing airbag, a first solenoid valve, a second solenoid valve, and a first load-sensing valve. The lift airbag is connected to the air storage device through the first solenoid valve. The air inlet of the first load-sensing valve is connected to the air storage device, the air outlet of the first load-sensing valve is connected to the load-bearing airbag, and the control end of the first load-sensing valve is connected to the air storage device through the second solenoid valve. The first load-sensing valve is used to connect the vehicle frame and the rear axle.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the load-bearing airbag includes a left load-bearing airbag and a right load-bearing airbag, and the first load-sensing valve includes a first left load-sensing valve and a first right load-sensing valve; the air inlet of the first left load-sensing valve and the first right load-sensing valve are both connected to the gas storage device, the air outlet of the first left load-sensing valve is connected to the left load-bearing airbag, the air outlet of the first right load-sensing valve is connected to the right load-bearing airbag, the control terminals of the first left load-sensing valve and the first right load-sensing valve are both connected to the same end of the second solenoid valve, and the other end of the second solenoid valve is connected to the gas storage device.

[0008] Furthermore, the left load-bearing airbag and the right load-bearing airbag are symmetrically arranged on the left and right sides of the lifting bridge; the first left load-sensing valve and the first right load-sensing valve are symmetrically arranged on the left and right sides of the vehicle frame.

[0009] Furthermore, a quick-release valve is provided between the first solenoid valve and the lifting airbag.

[0010] Furthermore, the vehicle air circuit system also includes a braking control device, which includes a lift axle brake chamber, a rear axle brake chamber, a master cylinder, a relay valve, a third solenoid valve, and a second load-sensing valve. The inlet of the master cylinder is connected to the air storage device, and the outlet of the master cylinder is connected to the control terminal of the relay valve. The inlet of the relay valve is connected to the air storage device, and the outlet of the relay valve is connected to the rear axle brake chamber. The control terminal of the second load-sensing valve is connected to the outlet of the master cylinder through the third solenoid valve. The inlet of the second load-sensing valve is connected to the outlet of the relay valve, and the outlet of the second load-sensing valve is connected to the lift axle brake chamber. The second load-sensing valve is used to connect the vehicle frame and the rear axle.

[0011] Furthermore, the lifting axle brake chamber includes a left lifting axle brake chamber and a right lifting axle brake chamber, and the second load-sensing valve includes a second left load-sensing valve and a second right load-sensing valve; the control terminals of the second left load-sensing valve and the second right load-sensing valve are both connected to the outlet of the master cylinder through the third solenoid valve, the inlet terminals of the second left load-sensing valve and the second right load-sensing valve are both connected to the outlet of the relay valve, the outlet of the second left load-sensing valve is connected to the left lifting axle brake chamber, and the outlet of the second right load-sensing valve is connected to the right lifting axle brake chamber.

[0012] Furthermore, the left brake chamber and the right brake chamber of the lifting axle are symmetrically arranged on the left and right sides of the lifting axle; the second left load sensing valve and the second right load sensing valve are symmetrically arranged on the left and right sides of the vehicle frame.

[0013] Furthermore, the air storage device includes an auxiliary air storage cylinder and a rear axle brake air storage cylinder; the lifting axle control device is connected to the auxiliary air storage cylinder, and the brake control device is connected to the rear axle brake air storage cylinder.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] 1. This utility model controls the inflation of the load-bearing airbag by setting a first load-sensing valve. The inflation pressure of the load-bearing airbag can be determined according to the load status of the rear axle, thereby controlling the load-bearing capacity of the lifting axle in real time and keeping the inflation pressure of the load-bearing airbag in a suitable state.

[0016] 2. By setting up a lifting axle brake chamber, the lifting axle participates in braking, and a second load-sensing valve is set up to control the air pressure of the lifting axle brake chamber in real time. When the vehicle load is large, the lifting axle can supplement the vehicle with a large braking force, thereby improving the vehicle's braking effect. When the vehicle load is small, the lifting axle supplements the vehicle with a small braking force, which can avoid the vehicle from locking up due to excessive braking force on the supporting axle.

[0017] 3. By individually controlling the air pressure of the load-bearing airbags on the left and right sides and the air chambers of the lifting axle, different lifting axle load-bearing forces can be provided to each side of the vehicle when the load on both sides of the vehicle is uneven, such as when the vehicle is turning, so as to avoid the vehicle tilting. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the lifting bridge in Embodiment 1 of this utility model;

[0019] Figure 2 A schematic diagram of a vehicle air circuit system with a lifting bridge provided in Embodiment 1 of this utility model;

[0020] Figure 3 A schematic diagram of a vehicle air circuit system with a lifting bridge provided in Embodiment 2 of this utility model;

[0021] Figure 4 This is a schematic diagram of the lifting bridge control device in Embodiment 2 of this utility model;

[0022] Figure 5 This is a schematic diagram of the braking control device in Embodiment 2 of this utility model;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Air storage device; 11. Auxiliary air storage tank; 12. Rear axle brake air storage tank; 2. Lifting axle control device; 21. Lifting airbag; 22. Load-bearing airbag; 221. Left load-bearing airbag; 222. Right load-bearing airbag; 23. First solenoid valve; 24. Second solenoid valve; 25. First load-sensing valve; 26. Quick-release valve; 251. First left load-sensing valve; 252. First right load-sensing valve; 3. Braking control device; 31. Lifting axle brake chamber; 311. Lifting axle left brake chamber; 312. Lifting axle right brake chamber; 32. Rear axle brake chamber; 33. Master brake cylinder; 34. Relay valve; 35. Third solenoid valve; 36. Second load-sensing valve; 361. Second left load-sensing valve; 362. Second right load-sensing valve; 4. Lifting axle. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0028] Example 1

[0029] A vehicle air circuit system with a lift bridge includes an air storage device 1, a lift bridge control device 2, and a braking control device 3.

[0030] In this embodiment, the air storage device 1 includes an auxiliary air storage cylinder 11 and a rear axle brake air storage cylinder 12. The lifting axle control device 2 is connected to the auxiliary air storage cylinder 11, and the brake control device 3 is connected to the rear axle brake air storage cylinder 12, so that the inflation of the lifting axle control device 2 and the brake control device 3 do not interfere with each other, and avoid the situation where excessive inflation of one device leads to insufficient inflation of the other device.

[0031] The lifting bridge control device 2 includes a lifting airbag 21, a load-bearing airbag 22, a first solenoid valve 23, a second solenoid valve 24, and a first load-sensing valve 25. For example... Figure 1 As shown, both the lifting airbag 21 and the load-bearing airbag 22 are mounted on the lifting axle 4. In this embodiment, the two load-bearing airbags 22 are symmetrically arranged on the left and right sides of the lifting airbag 21. The first load-sensing valve 25 connects the vehicle frame and the rear axle, and controls the output air pressure based on the load status of the rear axle.

[0032] like Figure 2As shown, the lifting airbag 21 is connected to the auxiliary air storage tank 11 via the first solenoid valve 23, and a quick-release valve 26 is provided between the first solenoid valve 23 and the lifting airbag 21. The inlet end of the first load-sensing valve 25 is connected to the auxiliary air storage tank 11, the outlet end of the first load-sensing valve 25 is connected to the load-bearing airbag 22, and the control end of the first load-sensing valve 25 is connected to the auxiliary air storage tank 11 via the second solenoid valve 24.

[0033] When the vehicle is unloaded or the road surface is poor, the first solenoid valve 23 opens and the second solenoid valve 24 closes, the lifting airbag 21 inflates, and the carrying airbag 22 discharges the gas. At this time, the lifting bridge 4 is lifted, which reduces tire wear, fuel consumption and improves the vehicle's passability on poor roads.

[0034] When the vehicle load is large, the first solenoid valve 23 is closed and the second solenoid valve 24 is opened. This causes the lifting airbag 21 to deflate, the load-bearing airbag 22 to inflate, and the lifting bridge 4 to lower. The load-bearing capacity is also provided by the load-bearing airbag 22, increasing the overall carrying capacity of the vehicle. The quick-release valve 26 can quickly release the gas inside the lifting airbag 21, causing the lifting bridge 4 to drop rapidly.

[0035] In addition, by setting a first load-sensing valve 25 to control the inflation of the load-bearing airbag 22, the inflation pressure of the load-bearing airbag 22 can be determined according to the rear axle load status, thereby controlling the load-bearing capacity of the axle in real time and keeping the inflation pressure of the load-bearing airbag 22 in a suitable state.

[0036] The braking control device 3 includes a lift axle brake chamber 31, a rear axle brake chamber 32, a master cylinder 33, a relay valve 34, a third solenoid valve 35, and a second load-sensing valve 36. The lift axle brake chamber 31 is mounted on the lift axle 4. In this embodiment, the two brake chambers are symmetrically arranged on the left and right sides of the lift airbag 21. The rear axle brake chamber 32 is mounted on the rear axle and is used to achieve vehicle service braking. The second load-sensing valve 36 connects the vehicle frame and the rear axle, controlling the output air pressure based on the rear axle load status.

[0037] The air inlet of the master cylinder 33 is connected to the rear axle brake reservoir 12, and the air outlet of the master cylinder 33 is connected to the control terminal of the relay valve 34. The air inlet of the relay valve 34 is connected to the rear axle brake reservoir 12, and the air outlet of the relay valve 34 is connected to the rear axle brake chamber 32. The control terminal of the second load-sensing valve 36 is connected to the air outlet of the master cylinder 33 via the third solenoid valve 35. The air inlet of the second load-sensing valve 36 is connected to the air outlet of the relay valve 34, and the air outlet of the second load-sensing valve 36 is connected to the lift axle brake chamber 31.

[0038] This embodiment also incorporates a lifting axle brake chamber 31 to enable the lifting axle to participate in braking, and a second load-sensing valve 36 controls the air pressure of the lifting axle brake chamber 31 in real time. When the vehicle load is large, the lifting axle 4 can supplement the vehicle with a larger braking force, improving the vehicle's braking effect. When the vehicle load is small, the braking force supplemented by the lifting axle 4 is smaller, which can prevent the vehicle from locking up due to excessive braking force on the supporting axle.

[0039] Example 2

[0040] The difference between this embodiment and Embodiment 1 is that the load-bearing airbag 22 includes a left load-bearing airbag 221 and a right load-bearing airbag 222, and the first load-sensing valve 25 includes a first left load-sensing valve 251 and a first right load-sensing valve 252. The left load-bearing airbag 221 and the right load-bearing airbag 222 are symmetrically arranged on the left and right sides of the lifting axle 4. The first left load-sensing valve 251 and the first right load-sensing valve 252 are symmetrically arranged on the left and right sides of the vehicle frame.

[0041] like Figure 3 and Figure 4 As shown, the air inlet ends of the first left load-sensing valve 251 and the first right load-sensing valve 252 are both connected to the auxiliary air storage tank 11. The air outlet end of the first left load-sensing valve 251 is connected to the left load-bearing airbag 221, and the air outlet end of the first right load-sensing valve 252 is connected to the right load-bearing airbag 222. The control ends of the first left load-sensing valve 251 and the first right load-sensing valve 252 are both connected to the same end of the second solenoid valve 24. The other end of the second solenoid valve 24 is connected to the auxiliary air storage tank 11.

[0042] The lifting axle brake chamber 31 includes a left lifting axle brake chamber 311 and a right lifting axle brake chamber 312. The second load-sensing valve 36 includes a second left load-sensing valve 361 and a second right load-sensing valve 362. The left lifting axle brake chamber 311 and the right lifting axle brake chamber 312 are symmetrically arranged on the left and right sides of the lifting axle 4. The second left load-sensing valve 361 and the second right load-sensing valve 362 are symmetrically arranged on the left and right sides of the vehicle frame.

[0043] like Figure 3 and Figure 5 As shown, the control terminals of the second left load sensing valve 361 and the second right load sensing valve 362 are both connected to the air outlet of the brake master cylinder 33 via the third solenoid valve 35. The air inlet terminals of the second left load sensing valve 361 and the second right load sensing valve 362 are both connected to the air outlet of the relay valve 34. The air outlet of the second left load sensing valve 361 is connected to the left brake chamber 311 of the lifting axle, and the air outlet of the second right load sensing valve 362 is connected to the right brake chamber 312 of the lifting axle.

[0044] This embodiment, by individually controlling the air pressure of the left and right side load-bearing airbags 22 and the lifting axle brake air chamber 31, can provide different lifting axle load-bearing forces to the two sides of the vehicle when the load on both sides of the vehicle is uneven due to situations such as vehicle turning, thereby preventing the vehicle from tilting.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vehicle air circuit system with a lift bridge, characterized in that, The system includes an air storage device and a lift axle control device. The lift axle control device includes a lift airbag, a load-bearing airbag, a first solenoid valve, a second solenoid valve, and a first load-sensing valve. The lift airbag is connected to the air storage device via the first solenoid valve. The inlet end of the first load-sensing valve is connected to the air storage device, and the outlet end of the first load-sensing valve is connected to the load-bearing airbag. The control end of the first load-sensing valve is connected to the air storage device via the second solenoid valve. The first load-sensing valve is used to connect the vehicle frame and the rear axle.

2. The vehicle air circuit system with a lift bridge according to claim 1, characterized in that, The load-bearing airbag includes a left load-bearing airbag and a right load-bearing airbag. The first load-sensing valve includes a first left load-sensing valve and a first right load-sensing valve. The air inlet of the first left load-sensing valve and the first right load-sensing valve are both connected to the gas storage device. The air outlet of the first left load-sensing valve is connected to the left load-bearing airbag. The air outlet of the first right load-sensing valve is connected to the right load-bearing airbag. The control terminals of the first left load-sensing valve and the first right load-sensing valve are both connected to the same end of the second solenoid valve. The other end of the second solenoid valve is connected to the gas storage device.

3. A vehicle air circuit system with a lift bridge according to claim 2, characterized in that, The left and right load-bearing airbags are symmetrically arranged on the left and right sides of the lifting bridge; the first left and right load-sensing valves are symmetrically arranged on the left and right sides of the vehicle frame.

4. A vehicle air circuit system with a lift bridge according to claim 1, characterized in that, A quick-release valve is provided between the first solenoid valve and the lifting airbag.

5. A vehicle air circuit system with a lift bridge according to claim 1, characterized in that, It also includes a braking control device, which comprises a lift axle brake chamber, a rear axle brake chamber, a master cylinder, a relay valve, a third solenoid valve, and a second load-sensing valve. The inlet of the master cylinder is connected to the air storage device, and the outlet of the master cylinder is connected to the control terminal of the relay valve. The inlet of the relay valve is connected to the air storage device, and the outlet of the relay valve is connected to the rear axle brake chamber. The control terminal of the second load-sensing valve is connected to the outlet of the master cylinder through the third solenoid valve. The inlet of the second load-sensing valve is connected to the outlet of the relay valve, and the outlet of the second load-sensing valve is connected to the lift axle brake chamber. The second load-sensing valve is used to connect the vehicle frame and the rear axle.

6. A vehicle air circuit system with a lift bridge according to claim 5, characterized in that, The lifting axle brake chamber includes a left lifting axle brake chamber and a right lifting axle brake chamber. The second load-sensing valve includes a second left load-sensing valve and a second right load-sensing valve. The control terminals of the second left load-sensing valve and the second right load-sensing valve are both connected to the outlet of the master cylinder through the third solenoid valve. The inlet terminals of the second left load-sensing valve and the second right load-sensing valve are both connected to the outlet of the relay valve. The outlet of the second left load-sensing valve is connected to the left lifting axle brake chamber, and the outlet of the second right load-sensing valve is connected to the right lifting axle brake chamber.

7. A vehicle air circuit system with a lift bridge according to claim 6, characterized in that, The left and right brake chambers of the lifting axle are symmetrically arranged on the left and right sides of the lifting axle; the second left and right load-sensing valves are symmetrically arranged on the left and right sides of the vehicle frame.

8. A vehicle air circuit system with a lift bridge according to claim 5, characterized in that, The air storage device includes an auxiliary air storage cylinder and a rear axle brake air storage cylinder; the lifting axle control device is connected to the auxiliary air storage cylinder, and the brake control device is connected to the rear axle brake air storage cylinder.

Images