KR101301751B1 - Closed loop air suspension system and automobile therewith - Google Patents

Abstract

The present invention relates to a closed loop air suspension system and an automobile having the same, including: a conversion valve for changing a flow path; A first passage having one end connected to the conversion valve; A control unit connected to the other end of the first channel and adjusted in height by pneumatic pressure; A second passage having both ends connected to the conversion valve and having a compressor and a dryer; A third passage having one end connected to the conversion valve, the other end connected to a second passage corresponding to the dryer and the compressor, and having a pressure sensor; A fourth passage having one end connected to the conversion valve; And a storage unit connected to the other end of the fourth channel and storing compressed air.

The closed loop air suspension system and the vehicle having the same according to the present invention isolate the storage tank in which air is stored while reducing the number of parts. It prevents the pneumatic pressure drop of the storage tank and blocks the inflow of water into the storage tank.

Air Suspension, Automotive, Air Spring, Compressor, Dryer

Description

CLOSED LOOP AIR SUSPENSION SYSTEM AND AUTOMOBILE THEREWITH}

1 is an embodiment of a conventional closed loop air suspension system.

2 is another embodiment of a conventional closed loop air suspension system.

3 is a view showing a path in which outside air is sucked in the closed loop air suspension system according to an embodiment of the present invention.

4 is a view showing a path in which the air in the storage tank is discharged to the outside in a closed loop air suspension system according to an embodiment of the present invention.

5 is a view showing a path in which the air of the chamber is moved to the storage tank in a closed loop air suspension system according to an embodiment of the present invention.

6 is a view showing a path in which the air of the storage tank is moved to the chamber in a closed loop air suspension system according to an embodiment of the present invention.

7 is a view showing a path of air for measuring the pressure of the chamber by using a pressure sensor in a closed loop air suspension system according to an embodiment of the present invention.

8 is a view showing a path of air for measuring the pressure of the storage tank using a pressure sensor in a closed loop air suspension system according to an embodiment of the present invention.

Description of the Related Art [0002]

31: Euro 1 32: Euro 2

33: third euro 34: fourth euro

40: conversion valve 50: control unit

51: first solenoid valve 52: control passage

53: chamber 60: storage

61: second solenoid valve 62: storage flow path

63: storage tank

The present invention relates to an air suspension system, and more particularly, to a closed loop type air suspension system and a vehicle having the same, which maintains the pneumatic pressure of the storage tank by blocking the air in and out of the storage tank while reducing the number of valves.

In general, suspension has a limitation in satisfying both riding comfort and steering stability at the same time. Good riding comfort reduces steering stability, and good steering stability reduces riding comfort. The reason for this is as follows. Softening the suspension's springs makes it easy to absorb shocks from bumpy roads and improve ride quality. However, the vehicle's body is unstable, which reduces steering stability. On the other hand, when the spring is hard, the steering stability is improved, but the riding comfort is decreased because it cannot absorb the shock transmitted from the roughness of the road. However, coil springs made of conventional steel cannot change their strength at will. So made is a suspension with air springs using air. Vehicle suspension using air has the advantage of absorbing the residual vibration of the road surface, and by varying the spring constant in accordance with the vehicle load, it is possible to make the natural frequency of the suspension constant. In addition, since the suspension can always be adjusted to the optimum design value regardless of the load of the vehicle, adjustment stability can be ensured. In addition, by adjusting the vehicle garage according to the driving conditions, convenient getting on and off is possible, loads can be easily loaded, and high-speed running stability and improved riding comfort at the rough road driving can be achieved.

1 is an embodiment of a conventional closed loop air suspension system.

1 is a closed loop type air suspension system having an air dryer 12 disposed in a compressed air passage 11, in which a compressor outlet 13 passes through an air dryer 12 to store a compressed air storage container 14; It is possible to connect to. Air can be conveyed from the atmosphere to the compressed air storage container 14 through the intake valve 15, the compressor 16, and the air dryer 12. Then, the compressed air can be discharged from the compressed air storage container 14 to the atmosphere via the air dryer 12 and the intake valve 15. In this case, air is moved from the atmosphere in the direction opposite to the direction in which the compressed air storage container 14 is filled, thereby ensuring good regeneration of the air dryer 12. Reference numeral 6 is a conversion valve for controlling the movement direction of the air, reference numeral 17 is an on-off valve for adjusting the air inlet and outlet of the air spring (18).

However, in the air suspension system as shown in FIG. 1, four changeover valves 6 and four open / close valves 17 are used, so that the number of valves is large, and thus, the design is complicated.

On the other hand, Figure 2 is another embodiment of a conventional closed loop air suspension system.

Referring to FIG. 2, another embodiment of the conventional air suspension system is described. An air tank 22, a compression unit 23 in communication with the air tank 22, and a valve disposed in communication with the compression unit 23 are described. An air spring 26 disposed in communication with the block portion 25 and the valve block portion 25 is provided. Such a system supplies air compressed by the compressor 24 to the air spring 26, or conversely, exhausts the air of the air spring 26 and supplies it to the air tank 22. At this time, the opening / closing valve 21 of the valve block portion 25 selectively interrupts the flow path.

In addition, a dryer 27 for drying the air is installed in the flow path through which the outside air flows in and out, and the air tank 22 and the air spring 26 are provided in the flow path through which air is circulated between the air tank 22 and the air spring 26. Pressure sensor 28 is installed to detect the pressure of.

However, in the air suspension system having the configuration as shown in FIG. 2, since the air tank 22 is connected to the dryer 27 in the idle state, moisture due to the high pressure air inside the air tank 22 may exist in some air flow paths. There is a problem that can be. In addition, when air leakage occurs in the air passage, there is a problem that the pressure of the air tank is lowered.

Therefore, there is a need to improve this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a closed loop type air suspension system and an automobile having the same, which simplifies the design of the pneumatic circuit and improves the water removal rate of the air.

The present invention provides a conversion valve for changing the flow path in order to achieve the above object; A first passage having one end connected to the conversion valve; A control unit connected to the other end of the first channel and adjusted in height by pneumatic pressure; A second passage having both ends connected to the conversion valve and having a compressor and a dryer; A third passage having one end connected to the conversion valve and the other end connected to the second passage corresponding to the dryer and the compressor, and having a pressure sensor; A fourth passage having one end connected to the conversion valve; And a storage unit connected to the other end of the fourth flow path and storing compressed air, and a vehicle having the closed loop type air suspension system.

The control unit is connected to the other end of the first flow path is connected to the first solenoid valve to control the air inlet; A control passage having one end connected to the first solenoid valve; And a chamber connected to the other end of the control passage and having a height adjusted by pneumatic pressure.

The storage unit is connected to the other end of the fourth flow path second solenoid valve for controlling the access of air; A storage passage having one end connected to the second solenoid valve; And a storage tank connected to the other end of the storage flow passage and storing compressed air.

The conversion valve connects one end of the first passage and one end of the second passage, and the other end of the second passage and one end of the fourth passage in the first position; One end of the first passage and one end of the third passage, and one end of the fourth passage and one end of the second passage at the second position are connected.

A suction flow passage communicating with the second flow passage corresponding to the compressor and the conversion valve to introduce external air is further provided, and the suction flow passage includes a second check valve for preventing air backflow.

The discharge passage is further provided in communication with the third passage to discharge the air to the outside, the discharge passage is characterized in that the discharge valve for controlling the movement of the air is provided.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of an air suspension system and a vehicle having the same according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

3 is a view showing a path in which the outside air is sucked in the closed loop air suspension system according to an embodiment of the present invention, Figure 4 is a storage tank in a closed loop air suspension system according to an embodiment of the present invention It is a figure which shows the path | route which air discharges to the outside.

And, Figure 5 is a view showing a path in which the air of the chamber is moved to the storage tank in a closed loop air suspension system according to an embodiment of the present invention, Figure 6 is a closed loop air according to an embodiment of the present invention In the suspension system, a view showing a path in which air in a storage tank moves to a chamber.

And, Figure 7 is a view showing a path of the air for measuring the pressure of the chamber using a pressure sensor in a closed loop type air suspension system according to an embodiment of the present invention, Figure 8 is an embodiment of the present invention In the closed loop type air suspension system according to the present invention, a diagram illustrating a path of air for measuring a pressure in a storage tank using a pressure sensor.

3 to 8, the closed loop air suspension system 100 includes a conversion valve 40, an adjustment unit 50, and a storage unit 60. In addition, the adjusting unit 50 and the storage unit 60 are connected to the first passage 31 to the fourth passage 34 which are connected to the conversion valve 40, thereby moving air.

One end of the first passage 31 is connected to the conversion valve 40 and the other end is connected to the control unit 50, and the control unit 50 is adjusted by height.

One end of the second flow passage 32 is connected to the conversion valve 40 and the other end is connected to the conversion valve 40. On the second passage 32, a compressor 101 for moving air and a dryer 102 for drying the air are provided. At this time, the compressor 101 is designed to be closer to one end of the second passage 32 than the dryer 102. On the other hand, the second passage 32 is provided with a first check valve 103 to prevent the back flow of air. The first check valve 103 is designed to be closer to the other end of the second passage 32 than the dryer 102. In addition, the second flow passage 32 is provided with a throttle valve 104 that bypasses the first check valve 103. The throttle valve 104 has an orifice shape and reduces the flow rate to allow efficient regeneration of the dryer 102.

One end of the third passage 33 is connected to the conversion valve 40, and the other end thereof is connected to the second passage 32. In this case, the third flow path 33 is connected to the second flow path 32 corresponding to the dryer 102 and the compressor 101, and is provided with a pressure sensor 105 for measuring air pressure.

One end of the fourth channel 34 is connected to the conversion valve 40 and the other end is connected to the storage unit 60. The storage unit 60 stores the compressed air.

Therefore, the conversion valve 40 uses a 2-way-5 port type valve. The conversion valve 40 connects one end of the first passage 31 and one end of the second passage 32 at the first position, and connects the other end of the second passage 32 and one end of the fourth passage 34. do. In addition, one end of the first passage 31 and one end of the third passage 33 are connected at the second position, and one end of the fourth passage 34 and one end of the second passage 32 are connected to each other.

On the other hand, the discharge passage 111 connected to the third passage 33 is provided with a discharge valve 112 for controlling the movement of air, the second passage corresponding to the conversion valve 40 and the compressor 101 The suction passage 121 connected to the 32 is provided with a second check valve 122 to prevent the backflow of air.

The adjusting unit 50 includes a first solenoid valve 51, a control passage 52, and a chamber 53. The first solenoid valve 51 is connected to the other end of the first flow passage 31 to control the inflow of air. The adjusting passage 52 has one end connected to the first solenoid valve 51 and the other end connected to the chamber 53. The height of the chamber 53 is adjusted by pneumatic pressure. The chamber 53 is mounted to each wheel portion of the vehicle to absorb shocks. To this end, the other end of the first passage 31 is branched to each wheel and connected to the first solenoid valve 51.

The storage unit 60 includes a second solenoid valve 61, a storage passage 62, and a storage tank 63. The second solenoid valve 61 is connected to the other end of the fourth flow path 34 to regulate the inflow of air. One end of the storage passage 62 is connected to the second solenoid valve 61 and the other end of the storage passage 62 is connected to the storage tank 63. The storage tank 63 stores compressed air. When the air movement of the storage tank 63 is restricted by the second solenoid valve 61 in the state of rest of the system, water is suppressed from being present in the system. In addition, even if leakage occurs in the internal pneumatic circuit, the pressure in the storage tank 63 is prevented from being lowered.

Referring to the operation of the air suspension system according to the present invention having the structure as described above are as follows.

Referring to FIG. 3, the process of introducing external air into the storage unit 60 will be described above. The conversion valve 40 is in the first position, and thus, one end of the first flow path 31 and one end of the second flow path 32. Connect and connect the other end of the second flow path 32 and one end of the fourth flow path (34). In addition, the second solenoid valve 61 is opened to connect the fourth passage 34 and the storage passage 62. In the above state, the external air is introduced into the suction flow path 121 by the drive of the compressor 101, passes through the dryer 102, and then passes through the conversion valve 40 and the second solenoid valve 61 to the storage tank 63. Is moved to). At this time, the outside air is removed from the moisture contained in the compressed air while passing through the dryer 102, the storage tank 63 is filled with air with little moisture. On the other hand, a portion of air is introduced into the pressure sensor 105 through the third passage 33 connected to the second passage 32 to measure the pressure filled in the storage tank 63.

Referring to FIG. 4, the process of discharging the air to the outside of the storage unit 60 will be described. As shown in FIG. Connect and connect the other end of the second flow path 32 and one end of the fourth flow path (34). In addition, the second solenoid valve 61 is opened to connect the fourth passage 34 and the storage passage 62. In addition, the discharge valve 112 is opened. In the above state, the compressed air of the storage tank 63 moves along the second flow path 32 via the second solenoid valve 61 and the conversion valve 40. Then, the air passes through the throttle valve 104 and passes through the dryer 102 in a state where the flow rate is reduced, and then is discharged to the outside through the discharge passage 111. This discharge process is performed when the pressure is excessive due to the internal temperature rise of the system or when a regeneration operation to remove moisture from the dryer 102 is required.

Referring to Figure 5 describes the process of moving the air from the control unit 50 to the storage unit 60, the conversion valve 40 is in the first position, one end and the second channel of the first flow path (31) One end of (32) is connected, and the other end of the second channel 32 and one end of the fourth channel 34 are connected. Then, the first solenoid valve 51 is opened to connect the other end of the first passage 31 and the control passage 52. In addition, the second solenoid valve 61 is opened to connect the fourth passage 34 and the storage passage 62. When the compressor 101 is driven in the above state, the air in the chamber 53 flows through the control passage 52, the first passage 31, the second passage 32, the fourth passage 34, and the storage passage 62. ) Is stored in the storage tank (63). At this time, since the moisture contained in the chamber 53 is removed by the dryer 102, the storage tank 63 is filled with air having a lower humidity than the air present in the chamber 53. Through this air movement process, the chamber 53 may be compressed by a load to lower the height of the vehicle. On the other hand, a portion of air is introduced into the pressure sensor 105 through the third passage 33 connected to the second passage 32 to measure the pressure filled in the storage tank 63.

Referring to Figure 6 describes the process of moving the air from the storage unit 60 to the adjusting unit 50, the conversion valve 40 is in the second position, one end and the third channel of the first flow path (31) One end of (33) is connected, and one end of the fourth channel 34 and one end of the second channel 32 are connected. Then, the first solenoid valve 51 is opened to connect the other end of the first passage 31 and the control passage 52. In addition, the second solenoid valve 61 is opened to connect the fourth passage 34 and the storage passage 62. When the compressor 101 is driven in the above state, the air in the storage tank 63 is stored in the storage passage 62, the fourth passage 34, the second passage 32, the third passage 33, and the first passage. 31 are sequentially moved to the control passage 52 and stored in the chamber 53. Through this air movement process, the chamber 53 may be expanded to increase the height of the vehicle. On the other hand, a portion of the air flows into the pressure sensor 105 through the third flow path 33 can measure the pressure filled in the chamber 53.

Referring to Figure 7 describes how to measure the pressure of the control unit 50 as follows. The changeover valve 40 is in the second position, connecting one end of the first flow path 31 and one end of the third flow path 33 and connecting one end of the fourth flow path 34 and one end of the second flow path 32. Connect. Then, the first solenoid valve 51 is opened to connect the other end of the first passage 31 and the control passage 52. In the above state, the air stored in the chamber 53 is sequentially moved to the control passage 52 and the third passage 33 to reach the pressure sensor 105, so that the pressure in the chamber 53 can be measured. . At this time, since the second solenoid valve 61 is closed, the pressure of the air stored in the storage tank 63 does not affect the pressure measurement process of the air stored in the chamber 53.

Referring to Figure 8 describes how to measure the pressure of the storage unit 60 as follows. The changeover valve 40 is in a first position, connecting one end of the first passage 31 and one end of the second passage 32, and connecting the other end of the second passage 32 and one end of the fourth passage 34. Connect. In addition, the second solenoid valve 61 is opened to connect the other end of the fourth passage 34 to the storage passage 62. In the above state, the air stored in the storage tank 63 sequentially moves to the storage flow path 62, the second flow path 32, and the third flow path 33 to reach the pressure sensor 105, thereby storing the storage tank 63. The pressure can be measured. At this time, since the first solenoid valve 51 is closed, the pressure of the air stored in the chamber 53 does not affect the pressure measuring process of the air stored in the storage tank 63.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the following claims.

As described above, the closed-loop air suspension system and the vehicle having the same according to the present invention have an effect of preventing air from entering into the storage tank in the idle state to prevent a decrease in pneumatic pressure and blocking moisture from entering the storage tank. .

In addition, the closed-loop air suspension system and the vehicle having the same according to the present invention use a 2-way-5port conversion valve, thereby reducing the overall number of valves, thereby simplifying the design and reducing the manufacturing cost.

Claims (12)

A conversion valve for changing the flow path; A first passage having one end connected to the conversion valve; A control unit connected to the other end of the first channel and adjusted in height by pneumatic pressure; A second passage having both ends connected to the conversion valve and having a compressor and a dryer; A third passage having one end connected to the conversion valve and the other end connected to the second passage corresponding to the dryer and the compressor, and having a pressure sensor; A fourth passage having one end connected to the conversion valve; And A closed loop type air suspension system, comprising a storage unit connected to the other end of the fourth channel and storing compressed air. The method of claim 1, The control unit is connected to the other end of the first flow path is connected to the first solenoid valve to control the air inlet; A control passage having one end connected to the first solenoid valve; And Closed loop type air suspension system, characterized in that the chamber is connected to the other end of the control passage and the height is adjusted by pneumatic. The method of claim 1, The storage unit is connected to the other end of the fourth flow path second solenoid valve for controlling the access of air; A storage passage having one end connected to the second solenoid valve; And A closed loop air suspension system, comprising a storage tank connected to the other end of the storage passage and storing compressed air. The method of claim 1, The conversion valve connects one end of the first passage and one end of the second passage, and the other end of the second passage and one end of the fourth passage in the first position; A closed loop air suspension system comprising connecting one end of the first channel and one end of the third channel and one end of the fourth channel and one end of the second channel at the second position. The method of claim 1, A suction flow passage is further provided between the compressor and the conversion valve in communication with the second flow passage for introducing external air. Closed loop type air suspension system, characterized in that the suction flow passage is provided with a second check valve for preventing air backflow. The method of claim 1, A discharge passage further communicating with the third passage for discharging air to the outside is further provided. Closed loop type air suspension system, characterized in that the discharge passage is provided with a discharge valve for controlling the movement of the air. A conversion valve for changing the flow path; A first passage having one end connected to the conversion valve; A control unit connected to the other end of the first channel and adjusted in height by pneumatic pressure; A second passage having both ends connected to the conversion valve and having a compressor and a dryer; A third passage having one end connected to the conversion valve and the other end connected to the second passage corresponding to the dryer and the compressor, and having a pressure sensor; A fourth passage having one end connected to the conversion valve; And And a closed loop air suspension system connected to the other end of the fourth flow path and including a storage unit for storing compressed air. 8. The method of claim 7, The control unit is connected to the other end of the first flow path is connected to the first solenoid valve to control the air inlet; A control passage having one end connected to the first solenoid valve; And And a chamber connected to the other end of the control flow passage and having a height adjusted by pneumatic pressure. 8. The method of claim 7, The storage unit is connected to the other end of the fourth flow path second solenoid valve for controlling the access of air; A storage passage having one end connected to the second solenoid valve; And And a storage tank connected to the other end of the storage flow path and storing compressed air. 8. The method of claim 7, The conversion valve connects one end of the first passage and one end of the second passage, and the other end of the second passage and one end of the fourth passage in the first position; An automobile having a closed loop air suspension system, wherein one end of the first passage and one end of the third passage and one end of the fourth passage and one end of the second passage are connected at the second position. 8. The method of claim 7, A suction flow passage is further provided between the compressor and the conversion valve in communication with the second flow passage for introducing external air. The inlet flow passage is provided with a closed loop air suspension system, characterized in that the second check valve for preventing air backflow. 8. The method of claim 7, A discharge passage further communicating with the third passage for discharging air to the outside is further provided. The vehicle having a closed loop air suspension system, characterized in that the discharge passage is provided with a discharge valve for controlling the movement of the air.

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