Air path system of automobile air suspension

Abstract

The utility model belongs to the technical field of automobile air suspension systems, and relates to an air path system of an automobile air suspension, which prevents an air path from being formed by arranging complex pipelines. The drying tank second air tap interface, the drying tank third air tap interface and the compressed air outlet interface of the air compression pump are communicated through a first channel; the exhaust valve is located on the portion, between the drying tank second air nozzle connector and the drying tank third air nozzle connector, of the first flow channel pipe section and communicates with the atmosphere through a seventh flow channel. The first air nozzle connector of the drying tank is communicated with the air storage tank connector through a second channel, and the third switching valve controls on-off of the second channel; the air spring connector is communicated with the air inlet connector of the air compression pump through a third channel, the first switching valve controls on-off of the third channel, the air storage tank connector is communicated with the air inlet connector of the air compression pump through a fourth channel, and the second switching valve controls on-off of the fourth channel. The first air nozzle connector of the drying tank is communicated with the air spring connector through a fifth channel, and the fourth switching valve controls on-off of the fifth channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile air suspension systems, and in particular relates to an air circuit system of an automobile air suspension. Background Art

[0002] With the advancement of automotive technology, the use of air suspension systems is becoming increasingly widespread. The core operating principle of an air suspension system is that an air compressor generates compressed air, which then drives the inflation and deflation of air springs to adjust the vehicle's height. Typically, an air suspension system consists of an air compressor pump, an air storage tank, air springs, and a drying tank, all connected by pipes. However, this system presents technical challenges such as complex piping layouts and high costs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air path system for an automobile air suspension, which avoids forming an air path through complicatedly arranged pipes.

[0004] The utility model solves the technical problem by adopting the following technical solution: an air circuit system of an automobile air suspension includes a valve seat; the valve seat is provided with an air inlet interface of an air compression pump, a compressed air outlet interface of an air compression pump, an air storage tank interface, a second air nozzle interface of a drying tank, a third air nozzle interface of a drying tank, a first air nozzle interface of a drying tank, and an air spring interface; a valve seat flow channel is provided in the valve seat, and the valve seat flow channel includes a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, a sixth flow channel, and a seventh flow channel;

[0005] The air inlet interface of the air compression pump is connected to the atmosphere through the sixth flow channel; the second air nozzle interface of the drying tank, the third air nozzle interface of the drying tank, and the compressed air outlet interface of the air compression pump are connected through the first flow channel; an exhaust valve is installed on the valve seat, and the exhaust valve is located on the first flow channel section between the second air nozzle interface of the drying tank and the third air nozzle interface of the drying tank, and the exhaust valve is connected to the atmosphere through the seventh flow channel.

[0006] The first gas nozzle interface of the drying tank is connected to the gas storage tank interface through the second flow channel, and a third switching valve for controlling the on-off of the second flow channel is installed on the valve seat;

[0007] The air spring interface is connected to the air inlet interface of the air compression pump through a third flow channel, and a first switching valve for controlling the on-off of the third flow channel is installed on the valve seat. The air tank interface is connected to the air inlet interface of the air compression pump through a fourth flow channel, and a second switching valve for controlling the on-off of the fourth flow channel is installed on the valve seat.

[0008] The first air nozzle interface of the drying tank is connected to the air spring interface through a fifth flow channel, and a fourth switching valve for controlling the on-off of the fifth flow channel is installed on the valve seat.

[0009] Furthermore, a power limiting valve is installed on the valve seat, and the valve seat flow channel also includes an eighth flow channel. The air inlet interface of the air compression pump is connected to the first flow channel through the eighth flow channel. The connection between the first flow channel and the eighth flow channel is located between the exhaust valve and the second air nozzle interface of the drying tank. The power limiting valve is used to control the on and off of the eighth flow channel.

[0010] Furthermore, a pressure and temperature sensor for detecting the pressure and temperature of the gas in the valve seat flow channel is installed on the valve seat, and the pressure and temperature sensor is connected to the valve seat flow channel.

[0011] Furthermore, the power limiting valve is a relief valve.

[0012] Furthermore, the first switching valve, the second switching valve, the third switching valve and the fourth switching valve are all two-position, two-way normally closed solenoid valves.

[0013] Compared with existing technologies, the present invention offers the following advantages: It provides an air circuit system for automotive air suspension that avoids the need for complex piping. First, the piping is routed within the valve seat, minimizing space requirements. Second, the number of external piping connections is significantly reduced, lowering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of gas flow when the gas tank is charged from the atmosphere under working condition 1;

[0016] Figure 3 This is the gas flow diagram for working condition 2, when the air spring is inflated from the atmosphere;

[0017] Figure 4 This is the schematic diagram of gas flow when the air is charged from the air tank to the empty spring in working condition three;

[0018] Figure 5 This is the schematic diagram of gas flow in working condition 4 when exhausting from the empty spring to the gas tank;

[0019] Figure 6 This is a schematic diagram of gas flow when exhausting from the gas storage tank to the atmosphere under working condition five;

[0020] Figure 7 This is the schematic diagram of gas flow when exhausting from the air spring to the atmosphere in working condition six;

[0021] Figure 8This is working condition seven, a schematic diagram of gas flow when the pressure in the system exceeds the set value.

[0022] Figure markings: 1-valve seat; 2-air compression pump; 3-first air nozzle interface of the drying tank; 4-second air nozzle interface of the drying tank; 5-third air nozzle interface of the drying tank; 6-air storage tank interface; 7-first flow channel; 8-second flow channel; 9-third flow channel; 10-fourth flow channel; 11-fifth flow channel; 12-exhaust valve; 13-first switching valve; 14-second switching valve; 15-third switching valve; 16-fourth switching valve; 17-power limiting valve; 18-pressure and temperature sensor; 19-left front air spring FL interface; 20-left front air spring solenoid valve; 21-right front air spring FR interface; 22-right front air spring solenoid valve; 23-left rear air spring RL interface; 24-left rear air spring solenoid valve; 25-right rear air spring RR interface; 26-right rear air spring solenoid valve; 27-sixth flow channel; 28-seventh flow channel; 29-eighth flow channel. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] The air circuit system of a vehicle's air suspension includes a valve seat 1. The valve seat 1 is equipped with an air compressor pump air inlet and outlet port, an air storage tank port 6, a drying tank second air nozzle port 4, a drying tank third air nozzle port 5, a drying tank first air nozzle port 3, and air spring ports. The air spring ports are configured based on the number of air springs. When there are four air springs, they are located for the left front air spring, right front air spring, left rear air spring, and right rear air spring, respectively. The air spring ports include a left front air spring FL port 19, a right front air spring FR port 21, a left rear air spring RL port 23, and a right rear air spring RR port 25. The left front air spring is controlled by a left front air spring solenoid valve 20, the right front air spring by a right front air spring solenoid valve 22, the left rear air spring by a left rear air spring solenoid valve 24, and the right rear air spring by a right rear air spring solenoid valve 26. Preferably, the air storage tank interface 6, the second air nozzle interface 4 of the drying tank, the third air nozzle interface 5 of the drying tank, the first air nozzle interface 3 of the drying tank, the left front air spring FL interface 19, the right front air spring FR interface 21, the left rear air spring RL interface 23 and the right rear air spring RR interface 25 are located on the same side of the valve seat 1.

[0025] The valve seat 1 is provided with valve seat flow channels, which include a first flow channel 7, a second flow channel 8, a third flow channel 9, a fourth flow channel 10, a fifth flow channel 11, a sixth flow channel 27, and a seventh flow channel 28. The valve seat flow channels can be formed by machining, casting, or other methods. The vertical cross-sections of the first flow channel 7, the second flow channel 8, the third flow channel 9, the fourth flow channel 10, the fifth flow channel 11, the sixth flow channel 27, and the seventh flow channel 28 are all circular structures with a diameter of 3 to 6 mm. The valve seat 1 is preferably a rectangular structure.

[0026] The air inlet interface of the air compression pump is connected to the atmosphere through the sixth flow channel 27; the second air nozzle interface 4 of the drying tank, the third air nozzle interface 5 of the drying tank, and the compressed air outlet interface of the air compression pump are connected through the first flow channel 7; an exhaust valve 12 is installed on the valve seat 1, and the exhaust valve 12 is located on the pipe section of the first flow channel 7 between the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank. The exhaust valve 12 is connected to the atmosphere through the seventh flow channel 28.

[0027] The first gas nozzle interface 3 of the drying tank is connected to the gas storage tank interface 6 through the second flow channel 8. A third switching valve 15 for controlling the on-off of the second flow channel 8 is installed on the valve seat 1.

[0028] The air spring interface is connected to the air inlet interface of the air compression pump through the third flow channel 9, and a first switching valve 13 for controlling the on and off of the third flow channel 9 is installed on the valve seat 1. The air tank interface 6 is connected to the air inlet interface of the air compression pump through the fourth flow channel 10, and a second switching valve 14 for controlling the on and off of the fourth flow channel 10 is installed on the valve seat 1.

[0029] The first air nozzle interface 3 of the drying tank is connected to the air spring interface through a fifth flow channel 11 , and a fourth switching valve 16 for controlling the opening and closing of the fifth flow channel 11 is installed on the valve seat 1 .

[0030] Working condition 1: When filling the gas tank from the atmosphere, Figure 2 As shown, the exhaust valve 12, first switching valve 13, second switching valve 14, and fourth switching valve 16 are closed, and the third switching valve 15 is opened, connecting the first flow channel 7 and the second flow channel 8. Air enters the air compressor 2 through the sixth flow channel 27 and the air inlet interface of the air compressor pump, where it is compressed. The compressed air then enters the first flow channel 7 through the compressed air outlet interface of the air compressor pump, and then enters the drying tank through the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank for drying. The dried compressed air enters the second flow channel 8 through the first air nozzle interface 3 of the drying tank, and then enters the air storage tank through the air storage tank interface 6. At this point, the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank both serve as air inlets, and the first air nozzle interface 3 of the drying tank serves as an air outlet.

[0031] Working condition 2: When the air spring is inflated from the atmosphere, Figure 3As shown, the exhaust valve 12, the first switching valve 13, the second switching valve 14, and the third switching valve 15 are closed, and the fourth switching valve 16 is opened, connecting the first flow channel 7 and the fifth flow channel 11. Air enters the air compressor 2 through the sixth flow channel 27 and the air inlet interface of the air compressor pump, where it is compressed. The compressed air then enters the first flow channel 7 through the compressed air outlet interface of the air compressor pump. It then enters the drying tank through the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank, respectively, for drying. The dried compressed air then enters the fifth flow channel 11 through the first air nozzle interface 3 of the drying tank, and then inflates the air spring that needs to be inflated through the corresponding air spring solenoid valve. At this point, the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank both serve as air inlets, and the first air nozzle interface 3 of the drying tank serves as an air outlet.

[0032] The first inflation can be done by either inflating the air tank from the atmosphere or inflating the air spring from the atmosphere. When there is air leakage in the valve seat flow channel, gas can also be replenished from the atmosphere.

[0033] Working condition three, when the air is charged from the air tank to the empty spring, if Figure 4 As shown, the exhaust valve 12, first switching valve 13, and third switching valve 15 are closed, and the second switching valve 14 and fourth switching valve 16 are opened, connecting the fourth flow channel 10, the first flow channel 7, and the fifth flow channel 11. Since the dry compressed air entering the air storage tank is partially depressurized, the dry compressed air in the air storage tank enters the air compressor 2 through the air storage tank interface 6, the fourth flow channel 10, and the air inlet interface of the air compressor pump in sequence, where it is compressed for secondary compression. After being compressed by the air compressor 2, the secondary compressed air enters the first flow channel 7, then enters the drying tank for drying through the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank, respectively. The secondary dried compressed air enters the fifth flow channel 11 through the first air nozzle interface 3 of the drying tank, and inflates the air spring that needs to be inflated through the corresponding air spring solenoid valve. At this time, the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank both serve as air inlets, and the first air nozzle interface 3 of the drying tank serves as an outlet.

[0034] Working condition 4: when exhausting from the air spring to the air tank, if Figure 5As shown, the exhaust valve 12, the second switching valve 14, and the fourth switching valve 16 are closed, and the first switching valve 13 and the third switching valve 15 are opened. The third flow channel 9, the first flow channel 7, and the second flow channel 8 are connected. The air spring solenoid valve of the air spring that needs to be exhausted is opened, and the air in the air spring enters the air compression pump 2 for compression through the third flow channel 9 and the air inlet interface of the air compression pump in turn. The compressed air enters the first flow channel 7 through the compressed air outlet interface of the air compression pump, and then enters the drying tank for drying through the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank respectively. The dried compressed air enters the second flow channel 8 through the first air nozzle interface 3 of the drying tank, and then enters the air storage tank through the air storage tank interface 6. At this time, the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank both serve as air inlets, and the first air nozzle interface 3 of the drying tank serves as an air outlet.

[0035] Working condition 5: when exhausting from the gas tank to the atmosphere, if Figure 6 As shown, the first switching valve 13, the second switching valve 14, and the fourth switching valve 16 are closed, and the third switching valve 15 and the exhaust valve 12 are opened, so that the second flow channel 8 and the first flow channel 7 are connected. The dry compressed air in the air storage tank enters the second flow channel 8 through the air storage tank interface 6, then enters the drying tank through the first gas nozzle interface 3 of the drying tank, and then enters the first flow channel 7 through the second gas nozzle interface 4 and the third gas nozzle interface 5 of the drying tank respectively to achieve backflushing. Finally, it is discharged into the atmosphere through the exhaust valve 12 and the seventh flow channel 28, removing the moisture in the molecular sieve of the drying tank and regenerating the molecular sieve of the drying tank. At this time, the first gas nozzle interface 3 of the drying tank serves as the air inlet, and the second gas nozzle interface 4 and the third gas nozzle interface 5 of the drying tank both serve as the air outlet.

[0036] Working condition six, when exhausting from the air spring to the atmosphere, if Figure 7 As shown, the first switching valve 13, the second switching valve 14, and the third switching valve 15 are closed, the fourth switching valve 16 and the exhaust valve 12 are opened, and the fifth flow channel 11 is connected to the first flow channel 7. The air spring solenoid valve of the air spring that needs to be exhausted is opened, and the air in the air spring enters the fifth flow channel 11 through the air spring interface, then enters the drying tank from the first air nozzle interface 3 of the drying tank, and then enters the first flow channel 7 from the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank respectively to achieve backblowing, and finally is discharged into the atmosphere through the exhaust valve 12 and the seventh flow channel 28, taking away the moisture in the drying tank molecular sieve and regenerating the drying tank molecular sieve. At this time, the first air nozzle interface 3 of the drying tank serves as the air inlet, and the second air nozzle interface 4 and the third air nozzle interface 5 of the drying tank both serve as the air outlet.

[0037] Among them, working conditions three and four are normal working conditions, that is, charging the empty spring from the air tank and exhausting the air from the empty spring to the air tank are normal working conditions.

[0038] Inflating the empty spring from the air tank has the following advantages: First, if the empty spring is inflated directly from the atmosphere each time, moisture will enter each time the air is inflated, which can easily cause the molecular sieve in the drying tank, that is, the desiccant, to fail quickly. When inflating the empty spring from the air tank, the gas is transferred internally, which can effectively prevent additional moisture from entering, thereby extending the service life of the molecular sieve in the drying tank. Second, due to the large pressure difference between the atmosphere and the air required in the empty spring, there is a technical problem of slow inflation speed when inflating the empty spring directly from the atmosphere each time. After the first inflation from the atmosphere to the air tank is completed, or when the first inflation from the atmosphere to the empty spring and the exhaust from the empty spring to the air tank are completed, dry compressed air is pre-stored in the air tank. The dry compressed air in the air tank is compressed twice by the air compression pump 2, which can greatly shorten the operating time of the compressor, achieve rapid inflation, and reduce energy consumption.

[0039] Preferably, working condition seven, such as Figure 8 As shown, a power limiting valve 17 is mounted on the valve seat 1. The valve seat flow path also includes an eighth flow path 29. The air compressor pump air inlet interface and the first flow path 7 are connected via the eighth flow path 29. The connection between the first flow path 7 and the eighth flow path 29 is located between the exhaust valve 12 and the second air nozzle interface 4 of the drying tank. The power limiting valve 17 is used to control the on-off of the eighth flow path 29. When the pressure in the system exceeds the set value, the power limiting valve 17 opens, and the gas in the valve seat flow path enters the air compressor pump 2 through the air compressor pump air inlet interface to relieve the system pressure.

[0040] Preferably, a pressure and temperature sensor 18 for detecting the pressure and temperature of the gas in the valve seat flow channel is installed on the valve seat 1, and the pressure and temperature sensor 18 is connected to the valve seat flow channel.

[0041] Specifically, the power limiting valve 17 is a relief valve.

[0042] Specifically, the air compression pump 2 is a piston pump, preferably a double-piston pump.

[0043] Specifically, the first switching valve 13 , the second switching valve 14 , the third switching valve 15 and the fourth switching valve 16 are all two-position, two-way normally closed solenoid valves.

[0044] The embodiments of this specific implementation are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. The air circuit system of automobile air suspension is characterized by: The invention comprises a valve seat (1); the valve seat (1) is provided with an air compressor pump air inlet interface, an air compressor pump compressed air outlet interface, an air storage tank interface (6), a drying tank second air nozzle interface (4), a drying tank third air nozzle interface (5), a drying tank first air nozzle interface (3) and an air spring interface; a valve seat flow channel is provided in the valve seat (1), and the valve seat flow channel comprises a first flow channel (7), a second flow channel (8), a third flow channel (9), a fourth flow channel (10), a fifth flow channel (11), a sixth flow channel (27) and a seventh flow channel (28); The air inlet interface of the air compression pump is connected to the atmosphere through the sixth flow channel (27); the second air nozzle interface (4) of the drying tank, the third air nozzle interface (5) of the drying tank and the compressed air outlet interface of the air compression pump are connected through the first flow channel (7); an exhaust valve (12) is installed on the valve seat (1), and the exhaust valve (12) is located on the first flow channel (7) pipe section between the second air nozzle interface (4) of the drying tank and the third air nozzle interface (5) of the drying tank, and the exhaust valve (12) is connected to the atmosphere through the seventh flow channel (28); The first gas nozzle interface (3) of the drying tank is connected to the gas storage tank interface (6) via the second flow channel (8), and a third switching valve (15) for controlling the on-off of the second flow channel (8) is installed on the valve seat (1); The air spring interface is connected to the air inlet interface of the air compression pump via a third flow channel (9); a first switching valve (13) for controlling the on-off of the third flow channel (9) is installed on the valve seat (1); the air storage tank interface (6) is connected to the air inlet interface of the air compression pump via a fourth flow channel (10); a second switching valve (14) for controlling the on-off of the fourth flow channel (10) is installed on the valve seat (1); The first air nozzle interface (3) of the drying tank is connected to the air spring interface through a fifth flow channel (11), and a fourth switching valve (16) for controlling the opening and closing of the fifth flow channel (11) is installed on the valve seat (1).

2. The air circuit system of the automobile air suspension according to claim 1, characterized in that: A power limiting valve (17) is installed on the valve seat (1), and the valve seat flow channel also includes an eighth flow channel (29). The air inlet interface of the air compression pump is connected to the first flow channel (7) through the eighth flow channel (29). The connection between the first flow channel (7) and the eighth flow channel (29) is located between the exhaust valve (12) and the second air nozzle interface (4) of the drying tank. The power limiting valve (17) is used to control the on-off of the eighth flow channel (29).

3. The air circuit system of the automobile air suspension according to claim 1, characterized in that: A pressure and temperature sensor (18) for detecting the pressure and temperature of the gas in the valve seat flow channel is installed on the valve seat (1), and the pressure and temperature sensor (18) is connected to the valve seat flow channel.

4. The air circuit system of the automobile air suspension according to claim 2, characterized in that: The power limiting valve (17) is a relief valve.

5. The air circuit system of the automobile air suspension according to claim 1, characterized in that: The first switching valve (13), the second switching valve (14), the third switching valve (15) and the fourth switching valve (16) are all two-position, two-way normally closed solenoid valves.

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