CN116608106A - Supercharger and air supply system for air suspension - Google Patents

Abstract

The air pump comprises a shell, four piston connecting rod assemblies and an eccentric shaft, wherein the four piston connecting rod assemblies and the eccentric shaft are installed in the shell, four air cylinders are arranged in the shell, one end of each piston connecting rod assembly is movably arranged in each air cylinder, the other end of each piston connecting rod assembly is connected with the eccentric shaft, the motor is connected with the eccentric shaft, and the motor is used for driving the eccentric shaft to rotate so as to realize compressed air. The supercharger increases the first-order frequency and can effectively reduce exhaust noise. The application also relates to an air supply system of the air suspension.

Description

Supercharger and air supply system for air suspension

Technical Field

The application relates to the technical field of superchargers, in particular to a supercharger and an air supply system of an air suspension.

Background

Passenger or commercial vehicles utilize air spring air supply system to change the automobile body height and adjust the rigidity or the damping of hanging to improve the trafficability characteristic and the travelling comfort of vehicle. The air bag of the air spring air supply system needs to be filled with high-pressure air to support the vehicle, and the high-pressure air in the air bag needs to be discharged when the height of the vehicle is reduced. The existing air spring air supply system comprises a supercharger, an air storage tank and a plurality of air spring air bags, wherein the supercharger is respectively connected with the air storage tank and the air spring air bags through air pipes, and the supercharger is used for conveying high-pressure air to the air storage tank and the air spring air bags. The existing supercharger adopts a two-cylinder piston connecting rod mechanism or a three-cylinder piston connecting rod mechanism, and has the following defects whether a double cylinder or a three cylinder is adopted:

first, the unbalanced vibration and the first-order modal frequency are low, so that the vibration noise caused by the unbalanced vibration is difficult to eliminate on the whole vehicle.

Second, because of the small number of cylinders, the stroke is often designed to be large in order to increase the displacement, and the overall size of the product is increased.

Disclosure of Invention

In view of the above, the present application provides a supercharger that increases the first-order frequency and can effectively reduce exhaust noise.

The air pump comprises a shell, four piston connecting rod assemblies and an eccentric shaft, wherein the four piston connecting rod assemblies and the eccentric shaft are installed in the shell, four air cylinders are arranged in the shell, one end of each piston connecting rod assembly is movably arranged in each air cylinder, the other end of each piston connecting rod assembly is connected with the eccentric shaft, the motor is connected with the eccentric shaft, and the motor is used for driving the eccentric shaft to rotate so as to realize compressed air. The supercharger provided by the application adopts four-cylinder small-stroke arrangement, and can effectively reduce exhaust noise on the premise of not increasing the size.

In the embodiment of the application, the two cylinders are arranged vertically symmetrically, and the other two cylinders are arranged horizontally symmetrically; the four piston connecting rod assemblies are distributed in a cross shape around the eccentric shaft. The structural arrangement of the four cylinders and the four piston connecting rod assemblies is good in longitudinal balance and small in vibration.

In an embodiment of the present application, each of the piston rod assemblies includes a connecting rod, a piston ring, and an intake valve, the connecting rod includes a first end and a second end opposite to each other, the first end is connected to the eccentric shaft, the second end is disposed in the cylinder, and the piston ring and the intake valve are connected to the second end.

In the embodiment of the application, the eccentric shaft is connected with a bearing, the first end is provided with a clamping groove, the outer ring of the bearing is arranged in the clamping groove, the first end is provided with fixing blocks protruding along the axial direction of the eccentric shaft, the fixing blocks of the four connecting rods are mutually arranged around the eccentric shaft at 90 degrees, and the four fixing blocks are connected through clamping springs.

In an embodiment of the application, the first end is tapered, and the width of the first end gradually decreases toward the eccentric shaft. The first end of the application is conical, so that the interference of two adjacent connecting rods can be avoided.

In an embodiment of the present application, four mounting channels are provided on the housing, four air cylinders are respectively mounted in the four mounting channels, the air pump further includes four air outlet valves, the four air outlet valves are respectively mounted in the mounting channels, and each air outlet valve is connected with each air cylinder.

In an embodiment of the present application, the exhaust valve includes an exhaust cover, an exhaust seat, and an exhaust valve plate, where the exhaust cover is disposed opposite to the exhaust seat, the exhaust valve plate is disposed on the exhaust seat, the exhaust cover is connected to the installation channel, the exhaust seat is connected to the cylinder, a fixed cylinder is disposed on a side of the exhaust cover near the exhaust seat, the exhaust seat is provided with a through hole communicated with the cylinder, the exhaust valve plate includes a fixed portion and a movable portion that are relatively connected, the fixed cylinder abuts against the fixed portion, the movable portion covers the through hole, and gas in the cylinder can push the movable portion to conduct an inner cavity of the fixed cylinder with the cylinder. According to the exhaust valve, the exhaust cover and the exhaust valve plate are not required to be provided with the limiting support for limiting the exhaust cover and the exhaust valve plate, so that the manufacturing cost can be reduced.

In an embodiment of the present application, a through hole is formed in a side wall of the fixed cylinder, the through hole communicates the installation channel with an inner cavity of the fixed cylinder, and an exhaust channel communicating the installation channel is formed in the housing.

In an embodiment of the present application, a limiting cylinder is further disposed on a side of the exhaust cover, which is close to the exhaust seat, the limiting cylinder is located in the fixed cylinder, an end portion of the limiting cylinder is spaced from the movable portion, and gas in the cylinder can push the movable portion to abut against the end portion of the limiting cylinder. The limiting cylinder can limit the movable part.

The application also relates to an air supply system of the air suspension, comprising the supercharger.

The eccentric shaft of the supercharger has one piston connecting rod assembly to compress air every 90 degrees of rotation, and four piston connecting rod assemblies to compress air every round of rotation, so that the exhaust capacity of the supercharger is improved, and the first-order frequency of the supercharger is also increased. Because the supercharger adopts four-cylinder small-stroke arrangement, the exhaust noise can be effectively reduced.

Drawings

Fig. 1 is a schematic view of the structure of a supercharger according to the present application.

Fig. 2 is a schematic sectional view of the supercharger of the present application in the first direction.

Fig. 3 is a schematic sectional view of the supercharger of the present application in the second direction.

Fig. 4 is a schematic view of the structure of the supercharger according to the present application with the casing removed.

Fig. 5 is a schematic cross-sectional view of the piston rod assembly and eccentric shaft of the present application.

FIG. 6 is a schematic view of a partial cross-sectional configuration of the piston and connecting rod assembly shown in FIG. 5.

Fig. 7 is a schematic cross-sectional view of the exhaust valve of the present application.

Fig. 8 is a schematic structural view of an air supply system of the air suspension of the present application.

Detailed Description

Further advantages and effects of the present application will become apparent to those skilled in the art from the disclosure of the present application, which is described by the following specific examples.

In the following description, reference is made to the accompanying drawings which describe several embodiments of the application. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description is not to be taken in a limiting sense, and the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Although the terms first, second, etc. may be used herein to describe various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element.

Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

Fig. 1 is a schematic structural view of a supercharger of the present application, fig. 2 is a schematic structural view of a supercharger of the present application in a cross section in a first direction, fig. 3 is a schematic structural view of a supercharger of the present application in a cross section in a second direction, fig. 4 is a schematic structural view of a supercharger of the present application when a casing is removed, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, a supercharger 10 includes an air pump 11 and a motor 12, the air pump 11 includes a casing 111, four piston rod assemblies and an eccentric shaft 115 installed in the casing 111, four cylinders 119 are provided in the casing 111, one ends of each piston rod assembly are movably provided in each cylinder 119, the other ends of each piston rod assembly are connected to the eccentric shaft 115, the motor 12 is connected to the eccentric shaft 115, and the motor 12 is used to drive the eccentric shaft 115 to rotate to realize compressed air.

The eccentric shaft 115 of the supercharger 10 of the present application has one piston-rod assembly to complete the compression of gas every 90 ° rotation, and four piston-rod assemblies to complete the compression of air every one rotation of the eccentric shaft 115, thereby increasing the displacement of the supercharger 10 and increasing the first-order frequency of the supercharger 10. Because the supercharger 10 of the present application adopts a four-cylinder small stroke arrangement, exhaust noise can be effectively reduced without increasing the size.

Alternatively, as shown in fig. 3 and 4, two cylinders 119 are arranged symmetrically up and down, and the other two cylinders 119 are arranged symmetrically left and right; four piston rod assemblies are arranged in a cross around the eccentric shaft 115. The structural arrangement of the four cylinders and the four piston connecting rod assemblies is good in longitudinal balance and small in vibration.

Alternatively, FIG. 5 is a schematic cross-sectional view of a piston rod assembly and eccentric shaft of the present application, as shown in FIG. 5, each piston rod assembly including a connecting rod 112, a piston ring 113 and an intake valve 114, the connecting rod 112 including opposed first and second ends 1121, 1122, the first end 1121 being connected to the eccentric shaft 115, the second end 1122 being disposed in the cylinder 119, the piston ring 113 and the intake valve 114 being connected to the second end 1122. In this embodiment, a portion of the piston ring 113 is secured between the intake valve 114 and the second end 1122, and another portion of the piston ring 113 is in contact with the cylinder wall of the cylinder 119.

Alternatively, as shown in fig. 4 and 5, the eccentric shaft 115 is connected with a bearing 116, the first end 1121 is provided with a clamping groove 101, the outer ring of the bearing 116 is installed in the clamping groove 101, the first end 1121 is provided with a fixed block 1123 protruding along the axial direction of the eccentric shaft 115, the fixed blocks 1123 of the four connecting rods 112 are mutually arranged around the eccentric shaft 115 at 90 degrees, and the four fixed blocks 1123 are connected through a clamp spring 117. In this embodiment, the four fixing blocks 1123 are tapered, so that interference between two adjacent connecting rods 112 can be avoided.

Alternatively, as shown in fig. 4, the first end 1121 is tapered, and the width of the first end 1121 gradually decreases toward the direction approaching the eccentric shaft 115, so that the interference between two adjacent connecting rods 112 can be avoided, and the four piston-connecting rod assemblies can smoothly complete the compression action.

Alternatively, fig. 6 is a schematic view of a partial cross-sectional structure of the piston rod assembly shown in fig. 5, as shown in fig. 6, the intake valve 114 includes an intake seat 1141, an intake valve plate 1142 and a limiting pin 1143, the intake seat 1141 is connected to the second end 1122, the intake seat 1141 is provided with a first intake channel 105, the second end 1122 is provided with a second intake channel communicating with the first intake channel 105, the intake valve plate 1142 is arranged to cover the first intake channel 105, a through hole is arranged in the middle of the intake valve plate 1142 in the arrangement of the intake valve plate 1142, one end of the limiting pin 1143 passes through the through hole and is connected to the intake seat 1141, and the other end of the limiting pin 1143 is provided with a limiting block for limiting the intake valve plate 1142; when the cylinder 119 is in air, the air flow pushes the air inlet valve 1142 away through the second air inlet channel and the first air inlet channel 105, and then the air inlet valve 1142 is pushed against the limiting block by the air flow.

Alternatively, as shown in fig. 2 and 3, four mounting passages 102 are provided on the housing 111, four cylinders 119 are respectively mounted in the four mounting passages 102, the air pump 11 further includes four exhaust valves 118, the four exhaust valves 118 are respectively mounted in the mounting passages 102, and each exhaust valve 118 is connected to each cylinder 119.

Alternatively, fig. 7 is a schematic cross-sectional structure diagram of an exhaust valve according to the present application, as shown in fig. 3 and 7, the exhaust valve 118 includes an exhaust cover 1181, an exhaust seat 1182, and an exhaust valve plate 1183, the exhaust cover 1181 is disposed opposite to the exhaust seat 1182, the exhaust valve plate 1183 is disposed on the exhaust seat 1182, the exhaust cover 1181 is connected to the mounting channel 102, the exhaust seat 1182 is connected to the cylinder 119, a fixed cylinder 1181a is disposed on a side of the exhaust cover 1181 near the exhaust seat 1182, the exhaust seat 1182 is provided with a through hole 104 communicating with the cylinder 119, the exhaust valve plate 1183 includes a fixed portion 1183a and a movable portion 1183b which are relatively connected, the fixed cylinder 1181a abuts against the fixed portion 1183a, the movable portion 1183b covers the through hole 104, and gas in the cylinder 119 can push the movable portion 1183b to make the inner cavity of the fixed cylinder 1181a be communicated with the cylinder 119; when the piston rod assembly compresses the air in the cylinder 119, the air pressure in the cylinder 119 is gradually increased until the air pressure is increased to a level that can push the movable portion 1183b away from the air discharge seat 1182, at this time, the through hole 104 communicates the inner cavity of the fixed cylinder 1181a with the cylinder 119, and the air in the cylinder 119 is discharged into the inner cavity of the fixed cylinder 1181 a. The exhaust valve 118 of the present application does not need to provide a limiting bracket for limiting the exhaust cover 1181 and the exhaust valve plate 1183, and can reduce the manufacturing cost.

Alternatively, as shown in fig. 3 and 7, the side wall of the fixed cylinder 1181a is provided with a through hole 103, the through hole 103 communicates the mounting channel 102 with the inner cavity of the fixed cylinder 1181a, and the casing 111 is provided with an exhaust channel communicating the mounting channel 102, that is, the pressurized air is discharged from the cylinder 119 sequentially through the through hole 104, the inner cavity of the fixed cylinder 1181a, the through hole 103, the mounting channel 102 and the exhaust channel.

Optionally, as shown in fig. 3 and 7, a limiting cylinder 1181b is further disposed on a side of the fixed exhaust cover 1181 near the exhaust seat 1182, the limiting cylinder 1181b is located in the fixed cylinder 1181a, an end of the limiting cylinder 1181b is spaced from the movable portion 1183b, and gas in the cylinder 119 can push the movable portion 1183b to abut against the end of the limiting cylinder 1181 b. In this embodiment, the limiting cylinder 1181b is located in the middle of the exhaust cover 1181, and is used for limiting the movable portion 1183 b.

Optionally, fig. 8 is a schematic structural diagram of an air supply system of an air suspension according to the present application, and as shown in fig. 8, the present application also relates to an air supply system of an air suspension, including the above-mentioned booster 10, a plurality of air spring bags 12, an air tank 13, a first three-way valve 141, a second three-way valve 142, a first two-way valve 151, a second two-way valve 152, a plurality of air spring solenoid valves 16, a first passage 171, a second passage 172, a third passage 173, a fourth passage 174, a fifth passage 175, and a sixth passage 176, wherein:

the first passage 171 is for intake air, and the first passage 171 is connected to an intake port of the supercharger 10;

one end of the second passage 172 is connected to the air outlet of the supercharger 10, and the other end of the second passage 172 is connected to the first three-way valve 141;

one end of the third channel 173 is connected with the first three-way valve 141, the other end of the third channel 173 is connected with the air storage tank 13, the first two-way valve 151 is connected with the third channel 173, and the first two-way valve 151 is used for switching on or blocking the third channel 173;

one end of the fourth passage 174 is connected to the first three-way valve 141, the other end of the fourth passage 174 is connected to the intake port of the supercharger 10, the second two-way valve 152 is connected to the fourth passage 174, the second two-way valve 152 is used to open or close the fourth passage 174, the second three-way valve 142 is connected to the fourth passage 174 between the second two-way valve 152 and the first three-way valve 141, the first three-way valve 141 is used to open the second passage 172 and the third passage 173, or to open the third passage 173 and the fourth passage 174;

one end of the fifth channel 175 is connected with the second three-way valve 142, the other end of the fifth channel 175 is butted with a plurality of air spring electromagnetic valves 16, each air spring electromagnetic valve 16 is respectively butted with each air spring air bag 12, and each air spring electromagnetic valve 16 is used for connecting or blocking the air passage between each air spring air bag 12 and the fifth channel 175;

one end of the sixth passage 176 is connected to the second passage 172, and the other end of the sixth passage 176 is connected to the second three-way valve 142, and the second three-way valve 142 is used to connect the fourth passage 174 to the fifth passage 175, or connect the fifth passage 175 to the sixth passage 176. In this embodiment, the air supply system of the air suspension includes four air spring bladders 12 and four air spring solenoid valves 16.

The booster 10 of the air supply system of the air suspension of the application can pump high-pressure air into the air storage tank 13 and each air spring air bag 12, and the air storage tank 13 can store the high-pressure air and provide the booster 10 or each air spring air bag 12 with the high-pressure air; when the air storage tank 13 supplies high-pressure air to the supercharger 10, the supercharger 10 can compress the high-pressure air of the air storage tank 13 again, so that the air inlet speed and pressure of the air spring air bag 12 are accelerated, the air supply system of the air suspension can quickly respond to change of the height of the vehicle body and adjust the rigidity or damping of the suspension; when the air tank 13 supplies high-pressure air to each air spring bag 12, the supercharger 10 can stop working at this time, the number of times of starting and stopping the supercharger 10 is reduced, the service life of the supercharger 10 can be prolonged, and the power consumption and noise can be reduced. In addition, the air supply system of the air suspension disclosed by the application realizes multiple pressure building working modes, multiple air discharging working modes and air pressure reading modes through the mutual matching of the first three-way valve 141, the second three-way valve 142, the first two-way valve 151, the second two-way valve 152 and the plurality of air spring electromagnetic valves 16, can flexibly switch different working modes according to actual needs, and has good adaptability.

Optionally, the air supply system of the air suspension further comprises a first check valve 181 and a second check valve 182, the first check valve 181 being connected to the first passage 171, air being able to enter the supercharger 10 through the first check valve 181, the first check valve 181 being able to prevent air from being discharged from the first passage 171; the second check valve 182 is connected to the second passage 172 and air can be discharged through the second check valve 182 to the first three-way valve 141, and the second check valve 182 can prevent air from entering the supercharger 10.

Optionally, the air supply system of the air suspension further comprises an air filter 19 and an air dryer 21, the air filter 19 being connected to the first channel 171 and the air dryer 21 being connected to the second channel 172. In the present embodiment, the air filter 19 is capable of adsorbing impurities in the air; the air dryer 21 can adsorb moisture in the flowing gas to obtain dry air.

Optionally, the air supply system of the air suspension further includes a safety valve 22 and a seventh passage 177, one end of the seventh passage 177 is connected to the air inlet of the supercharger 10, the other end of the seventh passage 177 is connected to the second passage 172, and the safety valve 22 is connected to the seventh passage 177; when the air pressure in the second passage 172 is greater than or equal to the preset value, the safety valve 22 opens the seventh passage 177; when the air pressure in the second passage 172 is less than a preset value, the safety valve 22 blocks the seventh passage 177.

Optionally, the air supply system of the air suspension further includes a metal block (not shown) on which the booster 10, the first three-way valve 141, the second three-way valve 142, the first two-way valve 151, the second two-way valve 152, and the plurality of air spring solenoid valves 16 are mounted, and the first passage 171, the second passage 172, the third passage 173, the fourth passage 174, the fifth passage 175, and the sixth passage 176 are formed. The supercharger 10, the solenoid valves and the channels of the application are integrated on a metal block, so that independent installation space is not required to be reserved for each device, and the arrangement space is greatly compressed.

Optionally, the metal block is connected with an air inlet joint, a plurality of air bag joints and an air tank joint in a threaded manner; one end of the air inlet joint is communicated with the first channel 171, and the other end of the air inlet joint is used for butt joint of the air inlet pipe; one end of each air bag connector is respectively connected with each air spring electromagnetic valve 16 in a butt joint mode, and the other end of each air bag connector is connected with each air spring air bag 12 in a butt joint mode; one end of the air tank connector is communicated with the third channel 173, and the other end of the air tank connector is connected with the air tank 13.

Optionally, the air supply system of the air suspension further includes a third check valve 183, an overflow channel 23 and a first air plug 241, wherein the third check valve 183 is connected to the second channel 172 between the second check valve 182 and the first three-way valve 141, one end of the overflow channel 23 is connected to an air inlet of the third check valve 183, the other end of the overflow channel 23 is connected to an air outlet of the third check valve 183, and the first air plug 241 is connected to the overflow channel 23; when the air pressure of the air inlet of the third check valve 183 is greater than or equal to a preset value, the air flow can be discharged into the air outlet of the third check valve 183 through the first air plug 241.

Optionally, the air supply system of the air suspension further includes a fourth check valve 184, an air exhaust channel 25, and a second air plug 242, the air exhaust channel 25 is used for exhausting air, one end of the air exhaust channel 25 is communicated with the second channel 172, the fourth check valve 184 and the second air plug 242 are connected to the air exhaust channel 25, and the second air plug 242 is a manual air bleed screw plug.

Optionally, the air supply system of the air suspension further comprises an air pressure sensor 26, and the air pressure sensor 26 is connected to the fifth channel 175.

Optionally, the air supply system of the air suspension comprises at least one of a first pressure building operation mode, a second pressure building operation mode, a third pressure building operation mode, a fourth pressure building operation mode and a fifth pressure building operation mode.

When the air supply system of the air suspension is in the first pressure-build operation mode, the supercharger 10 is operated, the first three-way valve 141 is connected with the second channel 172 and the third channel 173, the first two-way valve 151 is connected with the third channel 173, the second three-way valve 142 is connected with the fifth channel 175 and the sixth channel 176, the plurality of air spring electromagnetic valves 16 block each air spring air bag 12 and the fifth channel 175, at this time, the supercharger 10 sucks air to pressurize and pumps into the air storage tank 13, and the air pressure sensor 26 can detect the air pressure of the air storage tank 13.

When the air supply system of the air suspension is in the second pressure-build operation mode, the supercharger 10 is operated, the first three-way valve 141 is connected to the third passage 173 and the fourth passage 174, the first two-way valve 151 is connected to the third passage 173, the second three-way valve 142 is connected to the fifth passage 175 and the sixth passage 176, the air spring solenoid valves 16 are connected to the air spring bags 12 and the fifth passage 175, at this time, the supercharger 10 sucks air to pressurize and pumps the air into the air spring bags 12, and the air pressure sensor 26 can detect the air pressure of the air spring bags 12.

When the air supply system of the air suspension is in the third pressure-build operation mode, the supercharger 10 is operated, the first three-way valve 141 is connected to the third passage 173 and the fourth passage 174, the first two-way valve 151 is connected to the third passage 173, the second two-way valve 152 is connected to the fourth passage 174, the second three-way valve 142 is connected to the fifth passage 175 and the sixth passage 176, the air spring solenoid valves 16 are connected to the air spring bags 12 and the fifth passage 175, at this time, the supercharger 10 sucks the high-pressure air in the air tank 13 to pressurize and pump into the air spring bags 12, and the air pressure sensor 26 can detect the air pressure of the air spring bags 12.

When the air supply system of the air suspension is in the fourth pressure-build operation mode, the supercharger 10 is not in operation, the first three-way valve 141 is connected to the third passage 173 and the fourth passage 174, the first two-way valve 151 is connected to the third passage 173, the second two-way valve 152 is blocked from the fourth passage 174, the second three-way valve 142 is connected to the fourth passage 174 and the fifth passage 175, the air spring solenoid valves 16 are connected to the air spring bags 12 and the fifth passage 175, at this time, the high-pressure air in the air tank 13 is pressed into the air spring bags 12, and the air pressure sensor 26 can detect the air pressure of the air spring bags 12.

When the air supply system of the air suspension is in the fifth pressure-build operation mode, the supercharger 10 is operated, the first three-way valve 141 is connected to the second passage 172 and the third passage 173, the first two-way valve 151 is connected to the third passage 173, the second two-way valve 152 is connected to the fourth passage 174, the second three-way valve 142 is connected to the fourth passage 174 and the fifth passage 175, the air spring solenoid valves 16 are connected to the air spring bags 12 and the fifth passage 175, at this time, the supercharger 10 sucks high-pressure air in the air spring bags 12 to pressurize and pump the air into the air tank 13, and the air pressure sensor 26 can detect the air pressure of the air spring bags 12.

Optionally, the air supply system of the air suspension further includes a third two-way valve 153 and an eighth channel 178, the eighth channel 178 is used for exhausting air, the eighth channel 178 is communicated with the second channel 172, the third two-way valve 153 is connected with the eighth channel 178, and the third two-way valve 153 is used for communicating or blocking the eighth channel 178.

Optionally, the air supply system of the air suspension includes at least one of a first air bleed mode of operation and a second air bleed mode of operation.

When the air supply system of the air suspension is in the first air bleeding operation mode, the booster 10 is not operated, the first three-way valve 141 opens the third passage 173 and the fourth passage 174, the first two-way valve 151 blocks the third passage 173, the second three-way valve 142 opens the fifth passage 175 and the sixth passage 176, the air spring solenoid valves 16 open the air spring bags 12 and the fifth passage 175, and the third two-way valve 153 opens the eighth passage 178, and at this time, the high-pressure air in the air spring bags 12 is discharged through the eighth passage 178, and the air pressure sensor 26 can detect the air pressure of the air spring bags 12.

When the air supply system of the air suspension is in the second air bleeding operation mode, the supercharger 10 is not in operation, the first three-way valve 141 is connected to the second passage 172 and the third passage 173, the first two-way valve 151 is connected to the third passage 173, the second three-way valve 142 is connected to the fourth passage 174 and the fifth passage 175, each air spring solenoid valve 16 blocks each air spring bag 12 from the fifth passage 175, the second two-way valve 152 blocks the fourth passage 174, the third two-way valve 153 is connected to the eighth passage 178, and at this time, the high-pressure air in the air tank 13 is discharged through the eighth passage 178, and the air pressure sensor 26 can detect the air pressure of the air tank 13.

Optionally, the air supply system of the air suspension comprises at least one of a first air pressure reading mode and a second air pressure reading mode.

When the air supply system of the air suspension is in the first air pressure reading mode, the supercharger 10 is not in operation, the first three-way valve 141 is connected to the third and fourth passages 173, 174, 151 is connected to the third passage 173, 152 is connected to the fourth passage 174, 142 is connected to the fourth and fifth passages 174, 175, 16 is connected to the air spring bags 12 and 175, and the air pressure sensor 26 can read the air pressure of each air spring bag 12.

When the air supply system of the air suspension is in the second air pressure reading mode, the supercharger 10 is not in operation, the first three-way valve 141 is communicated with the third passage 173 and the fourth passage 174, the first two-way valve 151 is communicated with the third passage 173, the second two-way valve 152 is blocked from the fourth passage 174, the second three-way valve 142 is communicated with the fourth passage 174 and the fifth passage 175, and each air spring solenoid valve 16 is blocked from each air spring 12 and the fifth passage 175, and at this time, the air pressure sensor 26 can read the air pressure of the air tank 13.

Alternatively, when the first three-way valve 141 is powered on, the first three-way valve 141 turns on the third passage 173 and the fourth passage 174; when the first three-way valve 141 is de-energized, the first three-way valve 141 opens the second passage 172 and the third passage 173.

Optionally, when the second three-way valve 142 is powered on, the second three-way valve 142 opens the fifth passage 175 and the sixth passage 176; when the second three-way valve 142 is de-energized, the second three-way valve 142 opens the fourth passage 174 and the fifth passage 175.

Alternatively, the first two-way valve 151, the second two-way valve 152, the third two-way valve 153, and the plurality of air spring solenoid valves 16 are normally closed valves.

When the first two-way valve 151 is powered on, the first two-way valve 151 opens the third passage 173; when the first two-way valve 151 is powered off, the first two-way valve 151 blocks the third passage 173.

When the second two-way valve 152 is powered on, the second two-way valve 152 turns on the fourth passage 174; when the second two-way valve 152 is de-energized, the second two-way valve 152 blocks the fourth passage 174.

When the third two-way valve 153 is powered on, the third two-way valve 153 opens the eighth passage 178; when the third two-way valve 153 is de-energized, the third two-way valve 153 blocks the eighth passage 178.

When each air spring solenoid valve 16 is energized, each air spring solenoid valve 16 opens the air passage between each air spring bladder 12 and the fifth passage 175; when each air spring solenoid valve 16 is de-energized, each air spring solenoid valve 16 blocks the air passage between each air spring bladder 12 and the fifth passage 175.

The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (9)

1. The supercharger is characterized by comprising an air pump and a motor, wherein the air pump comprises a shell, four piston connecting rod assemblies and an eccentric shaft, the four piston connecting rod assemblies and the eccentric shaft are arranged in the shell, four air cylinders are arranged in the shell, one end of each piston connecting rod assembly is movably arranged in each air cylinder, the other end of each piston connecting rod assembly is connected with the eccentric shaft, the motor is connected with the eccentric shaft, and the motor is used for driving the eccentric shaft to rotate so as to realize compressed air.

2. The supercharger according to claim 1, wherein two of the cylinders are arranged vertically symmetrically and the other two of the cylinders are arranged laterally symmetrically; the four piston connecting rod assemblies are distributed in a cross shape around the eccentric shaft.

3. The supercharger of claim 1 or 2 wherein each of the piston rod assemblies comprises a connecting rod, a piston ring and an intake valve, the connecting rod comprising opposed first and second ends, the first end being connected to the eccentric shaft, the second end being disposed in the cylinder, the piston ring and the intake valve being connected to the second end; the first end is tapered, and the width of the first end gradually decreases toward the direction approaching the eccentric shaft.

4. A supercharger according to claim 3, wherein the eccentric shaft is connected with a bearing, the first end is provided with a clamping groove, the outer ring of the bearing is arranged in the clamping groove, the first end is provided with fixing blocks protruding along the axial direction of the eccentric shaft, the fixing blocks of four connecting rods are mutually arranged around the eccentric shaft at 90 degrees, and the four fixing blocks are connected through clamping springs.

5. The supercharger of claim 1 wherein the housing is provided with four mounting channels, four of the cylinders being mounted in the four mounting channels, respectively, and the air pump further comprises four exhaust valves mounted in the mounting channels, respectively, each exhaust valve being connected to each cylinder.

6. The supercharger according to claim 5, wherein the exhaust valve comprises an exhaust cover, an exhaust seat and an exhaust valve plate, the exhaust cover is arranged opposite to the exhaust seat, the exhaust valve plate is arranged on the exhaust seat, the exhaust cover is connected in the installation channel, the exhaust seat is connected with the cylinder, a fixed cylinder is arranged on one side, close to the exhaust seat, of the exhaust cover, the exhaust seat is provided with a through hole communicated with the cylinder, the exhaust valve plate comprises a fixed part and a movable part which are oppositely connected, the fixed cylinder is abutted against the fixed part, the movable part covers the through hole, and gas in the cylinder can push the movable part to enable the inner cavity of the fixed cylinder to be communicated with the cylinder.

7. The supercharger of claim 6 wherein the side wall of the stationary barrel is provided with perforations communicating the mounting passage with the interior cavity of the stationary barrel, and the housing is provided with an exhaust passage communicating the mounting passage.

8. The supercharger of claim 6 wherein a limit cylinder is further provided on the side of the exhaust cover adjacent to the exhaust seat, the limit cylinder is located in the fixed cylinder, the end of the limit cylinder is spaced from the movable portion, and the gas in the cylinder can push the movable portion to abut against the end of the limit cylinder.

9. An air supply system for an air suspension comprising a supercharger according to any one of claims 1 to 8.