Air path system of automobile air suspension

Abstract

The invention 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 invention 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 development of automobile technology, the use of air suspension systems is becoming more and more widespread. The core working principle of the air suspension system is to generate compressed air through an air compressor pump, and then use the compressed air to drive the air spring to charge and discharge to adjust the height of the vehicle body. Usually, the air suspension system includes devices such as an air compressor pump, an air storage tank, an air spring and a drying tank, and each device is connected by a pipeline. However, there are technical problems such as complex pipeline layout and high cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an air path system for an automobile air suspension, so as to avoid forming an air path through complicatedly arranged pipelines.

[0004] The technical solution adopted by the present invention to solve the technical problem is: the air circuit system of the 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, 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 air nozzle interface of the drying tank is connected to the air 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 storage 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 opening and closing 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 gas pressure and temperature 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 the prior art, the present invention has the following beneficial effects: the present invention provides an air path system for automobile air suspension, which avoids forming an air path through a complex arrangement of pipes. First, the arrangement of the pipes is completed inside the valve seat, which occupies a small space. Second, the number of external pipes is greatly reduced, which reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

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

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

[0017] Figure 4 This is the working condition three, when the gas flow is inflated from the gas tank to the empty spring;

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

[0019] Figure 6 This is the schematic diagram of gas flow when exhausting from the gas storage tank to the atmosphere under working condition 5;

[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 is further described below with reference to the accompanying drawings and embodiments.

[0024] The air circuit system of the automobile air suspension includes 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. The air spring interface is provided according to the number of air springs. When there are four air springs, they are respectively a left front air spring, a right front air spring, a left rear air spring and a right rear air spring. The air spring interface includes a left front air spring FL interface 19, a right front air spring FR interface 21, a left rear air spring RL interface 23 and a right rear air spring RR interface 25. The left front air spring is controlled by a left front air spring solenoid valve 20, the right front air spring is controlled by a right front air spring solenoid valve 22, the left rear air spring is controlled by a left rear air spring solenoid valve 24, and the right rear air spring is controlled by a right rear air spring solenoid valve 26. Preferably, the air tank interface 6, the second air nozzle interface 4 of the dry tank, the third air nozzle interface 5 of the dry tank, the first air nozzle interface 3 of the dry 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 a valve seat flow channel, and the valve seat flow channel includes 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 channel can be formed by machining, casting and the like. 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 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;

[0027] The first air nozzle interface 3 of the drying tank is connected to the air storage tank interface 6 through 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 .

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

[0029] The first air nozzle interface 3 of the drying tank is connected to the air spring interface through the 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, the first switching valve 13, the second switching valve 14 and the fourth switching valve 16 are closed, and the third switching valve 15 is opened, so that the first flow channel 7 and the second flow channel 8 are connected. The air enters the air compression pump 2 through the sixth flow channel 27 and the air inlet interface of the air compression pump in sequence for compression, and 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 from the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank for drying, and 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 of the drying tank and the third air nozzle interface 5 of the drying tank are both used as air inlets, and the first air nozzle interface 3 of the drying tank is used 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, so that the first flow channel 7 and the fifth flow channel 11 are connected. The air enters the air compression pump 2 through the sixth flow channel 27 and the air inlet interface of the air compression pump in turn for compression, and 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 from the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank for drying, and the dry compressed air 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 time, the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank are both used as air inlets, and the first air nozzle interface 3 of the drying tank is used as an air outlet.

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

[0033] Working condition 3: When the air is charged from the air tank to the empty spring, Figure 4 As shown, the exhaust valve 12, the first switching valve 13, and the third switching valve 15 are closed, and the second switching valve 14 and the fourth switching valve 16 are opened, and the fourth flow channel 10, the first flow channel 7, and the fifth flow channel 11 are connected. Since the dry compressed air entering the air tank is partially depressurized, the dry compressed air in the air tank enters the air compression pump 2 through the air tank interface 6, the fourth flow channel 10, and the air inlet interface of the air compression pump in turn for secondary compression. The secondary compressed air is compressed by the air compression pump 2 and enters the first flow channel 7, and then enters the drying tank from the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank for drying. The secondary dry compressed air enters the fifth flow channel 11 through the first air nozzle interface 3 of the drying tank, and the air spring that needs to be inflated is inflated through the corresponding air spring solenoid valve. At this time, the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank are both used as air inlets, and the first air nozzle interface 3 of the drying tank is used as an air outlet.

[0034] Working condition 4: when exhausting air from the air spring to the air tank, Figure 5As shown, the exhaust valve 12, the second switching valve 14 and the fourth switching valve 16 are closed, the first switching valve 13 and the third switching valve 15 are opened, and 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, and 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 from the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank for drying, and the dry compressed air enters the second flow channel 8 through the first air nozzle interface 3 of the drying tank, and the dry compressed air enters the air storage tank through the air storage tank interface 6. At this time, the second air nozzle interface 4 of the drying tank and the third air nozzle interface 5 of the drying tank are both used as air inlets, and the first air nozzle interface 3 of the drying tank is used as an air outlet.

[0035] Working condition 5: When exhausting gas from the gas tank to the atmosphere, Figure 6 As shown, the first switching valve 13, the second switching valve 14 and the fourth switching valve 16 are closed, the third switching valve 15 and the exhaust valve 12 are opened, and the second flow channel 8 is connected to the first flow channel 7. The dry compressed air in the air storage tank enters the second flow channel 8 through the air storage tank interface 6, and 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 of the drying tank and the third air nozzle interface 5 of the drying tank to achieve backblowing, and finally discharged into the atmosphere through the exhaust valve 12 and the seventh flow channel 28, taking away the moisture in the molecular sieve of the drying tank, so as to regenerate the molecular sieve of the drying tank. 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 of the drying tank and the third air nozzle interface 5 of the drying tank serve as the air outlet.

[0036] Working condition 6: when exhausting from the air spring to the atmosphere, 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, and 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 of the drying tank and the third air nozzle interface 5 of the drying tank to achieve backblowing, and finally 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, so that the drying tank molecular sieve is regenerated. 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 of the drying tank and the third air nozzle interface 5 of the drying tank serve as the air outlet.

[0037] Among them, working condition three and working condition four are normal working conditions, that is, filling the air spring from the air tank and exhausting the air from the air 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, i.e., the desiccant, to fail quickly. When inflating the empty spring from the air tank, the gas is transferred internally, which can effectively prevent the entry of additional moisture, 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 still a technical problem of slow inflation speed when the empty spring is inflated 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 is completed, dry compressed air is pre-stored in the air tank, and 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 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. When the pressure in the system exceeds the set value, the power limiting valve 17 opens, and the gas in the valve seat flow channel enters the air compression pump 2 through the air inlet interface of the air compression pump to achieve pressure relief of the system.

[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 protection scope of the present invention. Any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The air circuit system of automobile air suspension is characterized by: The valve seat (1) comprises an air inlet interface of an air compression pump, an air outlet interface of an air compression pump, an air storage tank interface (6), a second air nozzle interface (4) of a drying tank, a third air nozzle interface (5) of a drying tank, a first air nozzle interface (3) of a drying tank and an air spring interface; a valve seat flow channel is arranged 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 air nozzle interface (3) of the drying tank is connected to the air 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), and 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 via 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); 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); 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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