Integrated air supply unit and air suspension system

Abstract

The invention discloses an integrated air supply unit and an air suspension system. The integrated air supply unit comprises an ECU assembly, an installation support, an air spring air pipe connector, a valve block, a compression pump assembly, an air inlet and outlet connector, a throttling check valve, a pneumatic valve, a pressure sensor and a power limiting valve. Wherein the compression pump assembly integrates a motor, a dryer and a compression pump, cavities of the dual-cavity dryer and the compression pump are integrally designed on the same shell, the axes of the two cavities are distributed in parallel, the two cavities are installed on an installation face on one side of the valve block, and gas circuit sealing is achieved through an O-shaped ring. Besides, the air supply system comprises an air supply unit, an air storage tank, an air spring and an air filter, and various functions of lifting, descending, pressure detection and the like of the automobile suspension are achieved through different loop control, so that high integration of the air suspension system is achieved, occupied installation space is reduced, arrangement of the whole automobile is facilitated, and the service life of the automobile is prolonged. Meanwhile, the purposes of reducing cost, increasing efficiency and the like can be achieved.

Description

Technical Field

[0001] This invention relates to the automotive field, and in particular to an integrated air supply unit and an air suspension system. Background Technology

[0002] Traditional automotive suspensions primarily consist of springs and dampers. Traditional suspension springs are mainly purely mechanical springs with constant stiffness, such as leaf springs and coil springs, resulting in poor adjustability and comfort during driving. Air suspension replaces these mechanical springs with air springs in the form of air chambers. An air compressor controls the amount of air inside the air chambers to adjust their height and stiffness, thereby adjusting the height of the vehicle body and chassis, as well as the stiffness of some suspension components, thus improving overall driving comfort and handling.

[0003] Currently, the open air suspension system mainly used in the domestic automotive market consists of an air tank, an air compressor pump, an independent controller, an air pressure valve group, and air springs. There is also a mass-produced closed air suspension system on the market that integrates the air compressor pump, controller, and air pressure valve group into an air supply unit to pump air into the air springs of the air suspension system, thereby realizing the adjustment of the suspension height and stiffness.

[0004] US Patent 202016898163A discloses an air suspension system including an air supply system valve block comprising one or more air spring valves disposed within the air supply system block, the air supply system block having a valve block housing. The system also includes an air supply system block pneumatically coupled to one or more air springs, at least one reservoir coupled to the air supply system block, and at least one motor and pump disposed within the air supply system block. The air suspension also includes a rapid descent leveling valve disposed within the air supply system block. While this design largely integrates the air supply unit, the integration of the air compressor pump into the valve block results in a complex internal air passage structure, including complex features such as angled hole riveted steel balls, increasing manufacturing difficulty and costs. Summary of the Invention

[0005] The summary of this invention introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] In existing technologies, on the one hand, the air supply unit of an air suspension requires a large number of control valves and gas circuits to work together, resulting in a complex structure for the air circuit valve block, such as the complex features of riveted steel balls with oblique holes. On the other hand, the layout of gas compression and gas drying processes is relatively dispersed, which increases the number of sealing points for some components, thereby increasing the probability of air circuit leakage failure and hindering the improvement of integration and equipment miniaturization.

[0007] To solve the above-mentioned technical problems, the present invention provides an integrated air supply unit and air suspension system that is simple in structure, easy to assemble, occupies little space, and has a high degree of integration.

[0008] In a first aspect, the integrated air supply unit provided by the present invention is applied to an air suspension system, comprising:

[0009] ECU assembly 110 is used to control motor 151, process sensor signals, and drive pneumatic valves.

[0010] Mounting bracket 120 is bolted to valve block 140 and is used to fix it in a designated position on the vehicle.

[0011] Air spring air pipe interface 130, which is used to connect the air spring and valve block 140;

[0012] Valve block 140, which includes a gas circuit inside, is used to install the components of air supply unit 100;

[0013] The compressor assembly 150 and the intake and exhaust port assembly 170 are connected to the valve block 140 by bolts.

[0014] Throttling check valve 160, pneumatic valve 180, pressure sensor 190, and power limiting valve 200 are mounted on valve block 140.

[0015] Preferably, the integrated air supply unit is further improved such that the compressor pump assembly 150 includes a motor 151, a dryer 152, and a compressor pump 153, and is mounted on the same mounting plane on one side of the valve block 140.

[0016] Preferably, the integrated air supply unit is further improved, with the dryer 152 and the compressor pump 153 respectively housed in the drying chamber and the compression chamber. The drying chamber and the compression chamber are integrated cylindrical cavity shells. The motor 151 is bolted to the shell, and the shell is bolted to the valve block 140.

[0017] Preferably, the integrated air supply unit is further improved such that the ECU assembly 110 and the compressor pump assembly 150 are mounted on two opposing mounting planes on both sides of the valve block 140.

[0018] Preferably, the integrated air supply unit is further improved such that the mounting bracket 120 and the intake / exhaust interface 170 are mounted on two opposite mounting planes on both sides of the valve block 140.

[0019] Preferably, the integrated air supply unit is further improved in that the air spring pipe interface 130, the compressor pump assembly 150, and the intake and exhaust interfaces 170 are mounted on three different mounting planes on the side of the valve block 140, and the three mounting planes are perpendicular to each other.

[0020] Preferably, in a further improvement of the integrated air supply unit, the throttling check valve 160 and the intake / exhaust port 170 are mounted on the same mounting plane on one side of the valve block 140, and this plane is perpendicular to the mounting plane of the compressor assembly 150.

[0021] Preferably, in a further improved integrated air supply unit, the pneumatic valve 180, pressure sensor 190, and power limiting valve 200 are mounted on the same mounting plane on one side of the valve block 140, and are respectively mounted on two opposite mounting planes on both sides of the valve block 140 with the compression pump assembly 150.

[0022] Preferably, in a further improvement of the integrated air supply unit, the air spring pipe interface 130 is arranged on the same mounting plane as the valve block 140, fixed to the valve block 140 by means of threads, and the interface is sealed by a sealing ring.

[0023] Preferably, the integrated air supply unit is further improved in that the pneumatic valve 180 includes a one-way valve, an air spring valve, a reversing valve, and an exhaust valve, and is riveted to the valve block 140.

[0024] Preferably, in a further improvement, the integrated air supply unit includes a valve block 140 that integrates a compressor pump assembly 150, a one-way valve, an exhaust valve, a reversing valve, an air spring valve, a pressure sensor 190, a power limiting valve 200, a throttle check valve 160, an air spring pipe interface 130, and mounting interfaces for the inlet and outlet interface assembly 170, as well as bolt holes for fixed installation.

[0025] Preferably, the integrated air supply unit is further improved such that the valve block 140 internally houses a one-way valve, an exhaust valve, a reversing valve, an air spring valve, a pressure sensor 190, a power limiting valve 200, a throttling check valve 160, and an intake / exhaust interface assembly 170.

[0026] Preferably, the integrated air supply unit is further improved such that the valve block 140 does not contain a compression pump.

[0027] Preferably, the integrated air supply unit is further improved in that the gas circuit and mounting structure of the valve block 140 are both cylindrical structures, and there are no groove-like structures inside.

[0028] Preferably, in the further improved integrated air supply unit, the mounting interfaces of the one-way valve, exhaust valve, reversing valve, air spring valve, pressure sensor 190, and power limiting valve 200 are all arranged on the same mounting plane of the valve block 140, and the compressor pump assembly 150 is arranged on the opposite mounting plane of the mounting plane.

[0029] Preferably, the integrated air supply unit is further improved, and the throttling check valve 160 includes a sealing end cap 161, a throttling check valve body 162, and an O-ring seal 163.

[0030] Preferably, the integrated air supply unit is further improved by fixing the sealing end cap 161 to the valve block 140 by riveting to achieve a seal.

[0031] Preferably, the integrated air supply unit is further improved by providing a cylindrical boss on the valve body 162 of the throttling check valve for installing an O-ring 163, which is then installed on the valve block 140 by riveting to achieve the connection and disconnection of the gas circuit of the valve block 140.

[0032] In a second aspect, the present invention also provides an air suspension system, comprising: an integrated air supply unit and an air tank as described in any of the preceding claims, an air spring, and an air filter.

[0033] Preferably, the air suspension system is further improved, and the air supply unit includes a valve island assembly, a compressor pump assembly, and an ECU assembly 110;

[0034] The valve island assembly includes a valve block 140, an air spring valve, a pressure sensor, an exhaust valve, a check valve, a power limiting valve, a reversing valve, a throttle check valve, and an intake / exhaust port assembly 170.

[0035] The compressor pump assembly includes a motor 151, a dryer 152, and a compressor pump 153.

[0036] Preferably, the air suspension system is further improved.

[0037] Motor 151 is used to drive the compressor pump 153 to reciprocate to output pressurized gas from valve block 140;

[0038] Dryer 152, with built-in desiccant, is used to dry pressurized gas inside the gas circuit of valve block 140;

[0039] The throttling check valve 160 is used to control the gas flow rate when the gas storage tank is vented.

[0040] A directional valve is used to switch the direction of gas in a gas circuit.

[0041] An exhaust valve is used to control the connection between the internal gas circuit of valve block 140 and the external ambient air.

[0042] Power limiting valve 200, which is used to limit the maximum air pressure inside valve block 140;

[0043] An air filter is used to filter air entering the valve block 140 from the external environment;

[0044] Pressure sensor 190 is used to detect the air pressure inside the air tank and air spring;

[0045] An air spring valve is used to control the on / off state of the valve block 140 and the air spring;

[0046] The intake and exhaust interface assembly 170 is used to control the input and output of gas.

[0047] Preferably, the air suspension system is further improved.

[0048] The air supply unit 100 pumps high-pressure gas into the air spring to lift the air spring, thereby raising the vehicle body.

[0049] The air spring is deflated through the air supply unit 100 to lower the air spring, which in turn lowers the vehicle body.

[0050] When the internal air pressure of the air tank is lower than the specified limit, air is drawn from the external environment through the air supply unit 100 to achieve air spring lifting and lowering.

[0051] When the compressor pump 153 overheats, the air spring is directly vented through the air supply unit 100 to achieve an emergency descent of the air spring;

[0052] When the internal pressure of the gas storage tank is insufficient, the air supply unit 100 draws air from the external environment to build up pressure and thus fill the gas storage tank.

[0053] After the desiccant in the dryer 152 absorbs moisture, it is dried by reciprocating gas in the air supply unit 100 to regenerate the desiccant.

[0054] The coaxial air spring maintains air pressure balance through the air supply unit 100 to achieve coaxial pressure compensation;

[0055] When the air tank and air spring need to be pressure detected, the pressure sensor 190 in the air supply unit 100 detects the internal air pressure of the air tank and air spring.

[0056] This invention integrates all components of the air supply unit onto a valve block (preferably an aluminum valve block) through a rational modular layout design. Furthermore, it integrates the dryer, compressor pump, and motor assembly onto a housing (preferably an aluminum housing). The air tank, air spring, and air filter are connected to the air supply unit of this invention via air pipes; that is, the air tank, air spring, and air filter are not components of this invention and are located outside the air supply unit. The compressor pump of this invention, driven by two air compressor pumps and an eccentric shaft motor, reciprocates to exhaust air, providing air pressure to the supply unit. The dryer's internal valve block circuit contains pressurized gas to protect the air spring; a throttling check valve controls the gas flow rate when the gas tank releases gas; a reversing valve switches the direction of the gas path; an exhaust valve controls the connection between the internal gas path of the valve block and the ambient air; a power limiting valve limits the maximum air pressure of the supply unit to protect the system; an air filter initially filters the air entering the valve block from the environment; a pressure sensor detects the air pressure in the gas tank and air spring; each air spring valve controls the connection between the air supply unit and the air spring; and the ECU controller processes various sensor signals and drives the pneumatic valve coil and motor.

[0057] This invention not only fulfills multiple functions of automotive suspension, such as raising, lowering, and pressure detection, but also simplifies the internal pneumatic circuit of the valve block due to its modular design. By using the valve block of the air supply unit as only a carrier for internal air circuit transfer, only the pneumatic valve, pressure sensor, intake and exhaust interfaces, and mounting bolt holes need to be processed. Since it is separated from the air treatment and compression parts, the processing difficulty of the valve block is greatly reduced. Furthermore, the installation of components such as pneumatic valves only requires normal and mature riveting processes, without the need for large-diameter riveting, making the assembly of the valve island simpler and more reliable. Moreover, the highly integrated design reduces the number of sealing points, lowers the probability of air supply unit leakage failure, improves product reliability, and optimizes the assembly process, increasing the flexibility of production line design, reducing costs, and achieving integrated, miniaturized, and economical mechanical structure design. Attached Figure Description

[0058] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0059] Figure 1 This is a schematic diagram of the overall structure of the integrated air supply unit of the present invention.

[0060] Figure 2 This is an exploded structural diagram of the integrated air supply unit of the present invention.

[0061] Figure 3 This is a schematic diagram of the compressor pump assembly structure of the integrated air supply unit of the present invention.

[0062] Figure 4 This is a schematic diagram of the valve block structure of the integrated air supply unit of the present invention.

[0063] Figure 5 This is a schematic diagram of the throttling check valve structure of the integrated air supply unit of the present invention.

[0064] Figure 6 This is a schematic diagram of the air suspension system of the present invention.

[0065] Explanation of reference numerals in the attached figures:

[0066] 100. Air supply unit

[0067] 110. ECU Assembly

[0068] 120. Install bracket

[0069] 130. Air spring hose interface

[0070] 140. Valve block

[0071] 150. Compression pump assembly

[0072] 151. Electric motor

[0073] 152. Dryer

[0074] 153. Compression pump

[0075] 160. Throttling check valve

[0076] 161. Sealed end cap

[0077] 162. Throttling check valve body

[0078] 163. O-ring seal

[0079] 170. Intake and exhaust ports

[0080] 180. Pneumatic valve

[0081] 190. Pressure sensor

[0082] 200. Power limiting valve Detailed Implementation

[0083] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0084] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such orders can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0085] Example 1;

[0086] refer to Figures 1-5 As shown, the present invention provides an integrated air supply unit, comprising:

[0087] ECU assembly 110 is used to control motor 151, process sensor signals, and drive pneumatic valves.

[0088] Mounting bracket 120 is bolted to valve block 140 and is used to fix it in a designated position on the vehicle.

[0089] Air spring air pipe interface 130, which is used to connect the air spring and valve block 140;

[0090] Valve block 140, which includes a gas circuit inside, is used to install the components of air supply unit 100;

[0091] The compressor assembly 150 and the intake and exhaust port assembly 170 are connected to the valve block 140 by bolts.

[0092] Throttling check valve 160, pneumatic valve 180, pressure sensor 190, and power limiting valve 200 are mounted on valve block 140.

[0093] Preferably, the integrated air supply unit is further improved, and the compressor pump assembly 150 includes a motor 151, a dryer 152, and a compressor pump 153, which are installed on the same mounting plane on one side of the valve block 140; in this embodiment, two air compressor pumps are used to reciprocate and exhaust air under the drive of an eccentric shaft motor; the motor 151, dryer 152, and compressor pump 153 are sealed with O-rings.

[0094] Preferably, the integrated air supply unit is further improved, with the dryer 152 and the compressor pump 153 respectively housed in the drying chamber and the compression chamber. The drying chamber and the compression chamber are integrated cylindrical shells. The motor 151 is bolted to the shell, and the shell is bolted to the valve block 140. In this embodiment, the compressor pump assembly 150 and the valve block 140 are sealed on the mounting surface by O-rings to ensure high integration and reliable performance of the product.

[0095] Preferably, the integrated air supply unit is further improved such that the ECU assembly 110 and the compressor pump assembly 150 are mounted on two opposite mounting planes on both sides of the valve block 140; in this embodiment, the air passage between the ECU assembly 110 and the valve block 140 is sealed by pre-applying CIPG adhesive.

[0096] Preferably, the integrated air supply unit is further improved such that the mounting bracket 120 and the intake / exhaust interface 170 are mounted on two opposite mounting planes on both sides of the valve block 140; in this embodiment, the mounting bracket 120 and the valve block 140 are damped by a rubber pad and spring structure.

[0097] Preferably, the integrated air supply unit is further improved in that the air spring pipe interface 130, the compressor pump assembly 150, and the intake and exhaust interfaces 170 are installed on three different mounting planes on the side of the valve block 140, and the three mounting planes are perpendicular to each other; in this embodiment, the air spring pipe interface 130 and the intake and exhaust interfaces 170 are two external interfaces, which are respectively arranged on two adjacent mounting surfaces.

[0098] Preferably, in a further improvement of the integrated air supply unit, the throttling check valve 160 and the intake / exhaust port 170 are mounted on the same mounting plane on one side of the valve block 140, and this plane is perpendicular to the mounting plane of the compressor pump assembly 150. In this embodiment, the throttling check valve 160 and the intake / exhaust port 170 are fixed to the valve block 140 by interference fit and sealed by O-rings, and are adjacent to the compressor pump assembly 150.

[0099] Preferably, in a further improved integrated air supply unit, the pneumatic valve 180, pressure sensor 190, and power limiting valve 200 are mounted on the same mounting plane on one side of the valve block 140, and are respectively mounted on two opposite mounting planes on both sides of the valve block 140 with the compression pump assembly 150.

[0100] Preferably, in a further improvement of the integrated air supply unit, the air spring air pipe interface 130 is arranged on the same mounting plane as the valve block 140, fixed to the valve block 140 by means of threads, and the interface is sealed by a sealing ring; in this embodiment, the air spring air pipe interface 130 is sealed by an O-ring, and the O-ring is integrated inside the air pipe interface.

[0101] Preferably, the integrated air supply unit is further improved in that the pneumatic valve 180 includes a one-way valve, an air spring valve, a reversing valve, and an exhaust valve, and is riveted to the valve block 140.

[0102] Preferably, the integrated air supply unit is further improved in that the valve block 140 integrates the mounting interfaces of the compressor pump assembly 150, one-way valve, exhaust valve, reversing valve, air spring valve, pressure sensor 190, power limiting valve 200, throttle check valve 160, air spring air pipe interface 130 and air inlet and exhaust interface assembly 170, as well as bolt holes for fixed installation.

[0103] Preferably, the integrated air supply unit is further improved such that the valve block 140 internally houses a one-way valve, an exhaust valve, a reversing valve, an air spring valve, a pressure sensor 190, a power limiting valve 200, a throttling check valve 160, and an intake / exhaust interface assembly 170.

[0104] Preferably, the integrated air supply unit is further improved such that the valve block 140 does not contain a compression pump.

[0105] Preferably, the integrated air supply unit is further improved in that the gas circuit and mounting structure of the valve block 140 are both cylindrical structures, and there are no groove-like structures inside.

[0106] Preferably, in the further improved integrated air supply unit, the mounting interfaces of the one-way valve, exhaust valve, reversing valve, air spring valve, pressure sensor 190, and power limiting valve 200 are all arranged on the same mounting plane of the valve block 140, and the compressor pump assembly 150 is arranged on the opposite mounting plane of the mounting plane.

[0107] Preferably, the integrated air supply unit is further improved, and the throttling check valve 160 includes a sealing end cap 161, a throttling check valve body 162, and an O-ring seal 163.

[0108] Preferably, the integrated air supply unit is further improved by fixing the sealing end cap 161 to the valve block 140 by riveting to achieve a seal.

[0109] Preferably, the integrated air supply unit is further improved by providing a cylindrical boss on the valve body 162 of the throttling check valve for installing an O-ring 163, which is then installed on the valve block 140 by riveting to achieve the connection and disconnection of the gas circuit of the valve block 140.

[0110] Example 2;

[0111] refer to Figure 6 As shown, the present invention provides an air suspension system, comprising:

[0112] The integrated air supply unit and air tank, air spring and air filter described in any one of the above embodiments 1.

[0113] Preferably, the air suspension system is further improved, and the air supply unit includes a valve island assembly, a compressor pump assembly, and an ECU assembly 110;

[0114] The valve island assembly includes a valve block 140, an air spring valve, a pressure sensor, an exhaust valve, a check valve, a power limiting valve, a reversing valve, a throttle check valve, and an intake / exhaust port assembly 170.

[0115] The compressor pump assembly includes a motor 151, a dryer 152, and a compressor pump 153.

[0116] Preferably, the air suspension system is further improved.

[0117] Motor 151 is used to drive the compressor pump 153 to reciprocate to output pressurized gas from valve block 140;

[0118] Dryer 152, with built-in desiccant, is used to dry pressurized gas inside the gas circuit of valve block 140;

[0119] The throttling check valve 160 is used to control the gas flow rate when the gas storage tank is vented.

[0120] A directional valve is used to switch the direction of gas in a gas circuit.

[0121] An exhaust valve is used to control the connection between the internal gas circuit of valve block 140 and the external ambient air.

[0122] Power limiting valve 200, which is used to limit the maximum air pressure inside valve block 140;

[0123] An air filter is used to filter air entering the valve block 140 from the external environment;

[0124] Pressure sensor 190 is used to detect the air pressure inside the air tank and air spring;

[0125] An air spring valve is used to control the on / off state of the valve block 140 and the air spring;

[0126] The intake and exhaust port assembly 170 is used to control the input and output of gas.

[0127] In this example, the aforementioned components are connected to the valve block 140 in different ways and communicate with the air passage inside the valve block 140. The air tank and air spring are connected to the air supply unit 100 through air pipes. Two air compressor pumps, driven by an eccentric shaft motor, reciprocate to exhaust air, providing air pressure to the supply unit. The dryer dries the pressurized gas inside the valve block circuit, protecting the air spring. The throttling check valve controls the gas flow rate when the air tank releases air. The reversing valve switches the direction of the air passage. The exhaust valve controls the connection between the air passage inside the valve block and the ambient air. The power limiting valve limits the maximum air pressure of the supply unit to protect the system. The air filter initially filters the air entering the valve block from the environment. The pressure sensor detects the air pressure inside the air tank and air spring. Four air spring valves control the connection between the air supply unit and the four air springs. The ECU controller processes various sensor signals and drives the pneumatic valve coil and motor.

[0128] Preferably, the air suspension system is further improved.

[0129] The air supply unit 100 pumps high-pressure gas into the air spring to lift the air spring, thereby raising the vehicle body.

[0130] The air spring is deflated through the air supply unit 100 to lower the air spring, which in turn lowers the vehicle body.

[0131] When the internal air pressure of the air tank is lower than the specified limit, air is drawn from the external environment through the air supply unit 100 to achieve air spring lifting and lowering.

[0132] When the compressor pump 153 overheats, the air spring is directly vented through the air supply unit 100 to achieve an emergency descent of the air spring;

[0133] When the internal pressure of the gas storage tank is insufficient, the air supply unit 100 draws air from the external environment to build up pressure and thus fill the gas storage tank.

[0134] After the desiccant in the dryer 152 absorbs moisture, it is dried by reciprocating gas in the air supply unit 100 to regenerate the desiccant.

[0135] The coaxial air spring maintains air pressure balance through the air supply unit 100 to achieve coaxial pressure compensation;

[0136] When the air tank and air spring need to be pressure detected, the pressure sensor 190 in the air supply unit 100 detects the internal air pressure of the air tank and air spring.

[0137] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0138] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An integrated air supply unit, applied to an air suspension system, characterized in that, include: ECU assembly (110), which is used to control the motor (151) and process sensor signals and drive the pneumatic valves; Mounting bracket (120) is bolted to valve block (140) for fixing in a designated position on the vehicle; An air spring tubing interface (130) is used to connect the air spring and the valve block (140); Valve block (140), which includes a gas circuit and is used to install the components of air supply unit 100; The compressor assembly (150) and the intake and exhaust port assembly (170) are connected to the valve block (140) by bolts; A throttling check valve (160), a pneumatic valve (180), a pressure sensor (190), and a power limiting valve (200) are mounted on a valve block (140).

2. The integrated air supply unit as described in claim 1, characterized in that, include: The compressor assembly (150) includes a motor (151), a dryer (152), and a compressor (153), and is mounted on the same mounting plane on one side of the valve block (140).

3. The integrated air supply unit as described in claim 2, characterized in that, include: The dryer (152) and the compressor pump (153) are respectively housed in the drying chamber and the compression chamber. The drying chamber and the compression chamber are integrated cylindrical shells. The motor (151) is bolted to the shell, and the shell is bolted to the valve block (140).

4. The integrated air supply unit as described in claim 1, characterized in that, include: The ECU assembly (110) and the compressor pump assembly (150) are mounted on two opposite mounting planes on both sides of the valve block (140).

5. The integrated air supply unit as described in claim 1, characterized in that, include: The mounting bracket (120) and the intake / exhaust interface assembly (170) are mounted on two opposite mounting planes on both sides of the valve block (140).

6. The integrated air supply unit as described in claim 1, characterized in that, include: The air spring pipe interface (130), the compressor pump assembly (150), and the intake and exhaust interface assembly (170) are mounted on three different mounting planes on the side of the valve block (140), and the three mounting planes are perpendicular to each other.

7. The integrated air supply unit as described in claim 1, characterized in that, include: The throttling check valve (160) and the intake / exhaust port assembly (170) are mounted on the same mounting plane on one side of the valve block (140), and this plane is perpendicular to the mounting plane of the compression pump assembly (150).

8. The integrated air supply unit as described in claim 1, characterized in that, include: The pneumatic valve (180), pressure sensor (190), and power limiting valve (200) are mounted on the same mounting plane on one side of the valve block (140), and are mounted on two opposite mounting planes on both sides of the valve block (140) along with the compression pump assembly (150).

9. The integrated air supply unit as described in claim 1, characterized in that, include: The air spring pipe interface (130) is arranged on the same mounting plane as the valve block (140), and is fixed to the valve block (140) by means of threads, and the interface is sealed by a sealing ring.

10. The integrated air supply unit as claimed in claim 1, characterized in that, include: The pneumatic valve (180) includes a check valve, an air spring valve, a reversing valve, and an exhaust valve, and is installed on the valve block (140) by riveting.

11. The integrated air supply unit as claimed in claim 1, characterized in that, include: The valve block (140) integrates the mounting interfaces of the compressor pump assembly (150), check valve, exhaust valve, reversing valve, air spring valve, pressure sensor (190), power limiting valve (200), throttle check valve (160), air spring air pipe interface (130), and intake and exhaust interface assembly (170), as well as bolt holes for fixed installation.

12. The integrated air supply unit as described in claim 11, characterized in that, include: The valve block (140) internally houses a one-way valve, an exhaust valve, a reversing valve, an air spring valve, a pressure sensor (190), a power limiting valve (200), a throttling check valve (160), and an intake / exhaust port assembly (170).

13. The integrated air supply unit as claimed in claim 11, characterized in that, include: The valve block (140) does not house a compression pump.

14. The integrated air supply unit as claimed in claim 11, characterized in that, include: The valve block (140) has a cylindrical structure for both its gas circuit and its mounting structure, and it has no internal groove structure.

15. The integrated air supply unit as claimed in claim 11, characterized in that, include: The mounting interfaces of the check valve, exhaust valve, reversing valve, air spring valve, pressure sensor (190), and power limiting valve (200) are all arranged on the same mounting plane of the valve block (140), and the compression pump assembly (150) is arranged on the opposite mounting plane of the mounting plane.

16. The integrated air supply unit as claimed in claim 1, characterized in that, include: The throttling check valve (160) includes a sealing end cap (161), a throttling check valve body (162), and an O-ring seal (163).

17. The integrated air supply unit as claimed in claim 16, characterized in that, include: The sealing end cap (161) is fixed to the valve block (140) by riveting to achieve a seal.

18. The integrated air supply unit as described in claim 16, characterized in that, include: The valve body (162) of the throttling check valve is provided with a cylindrical boss for installing an O-ring (163), and is installed on the valve block (140) by riveting, so as to realize the conduction and isolation of the gas circuit of the valve block (140).

19. An air suspension system, characterized in that, include: The integrated air supply unit according to any one of claims 1-18; and Air tank, air spring, and air filter.

20. The air suspension system as claimed in claim 19, characterized in that, include: The air supply unit includes a valve island assembly, a compressor pump assembly, and an ECU assembly (110); The valve island assembly includes a valve block (140), an air spring valve, a pressure sensor, an exhaust valve, a check valve, a power limiting valve, a reversing valve, a throttle check valve, and an intake / exhaust port assembly (170). The compressor assembly includes a motor (151), a dryer (152), and a compressor (153).

21. The air suspension system as claimed in claim 20, characterized in that, include: The motor (151) is used to drive the compression pump (153) to reciprocate so that the valve block (140) can output pressurized gas; The dryer (152) has a built-in desiccant, which is used to dry the pressurized gas inside the gas circuit of the valve block (140); The throttling check valve (160) is used to control the gas flow rate when the gas storage tank is vented; The reversing valve is used to switch the direction of gas in the gas circuit; The exhaust valve is used to control the connection and disconnection between the internal gas circuit of the valve block (140) and the external ambient air; The power limiting valve (200) is used to limit the maximum air pressure inside the valve block (140); The air filter is used to filter air that enters the valve block (140) from the external environment; The pressure sensor (190) is used to detect the air pressure inside the air tank and the air spring; The air spring valve is used to control the opening and closing of the valve block (140) and the air spring; The intake and exhaust interface assembly (170) is used to control the input and output of gas.

22. The air suspension system as described in claims 19-21, characterized in that, include: The air supply unit (100) pumps high-pressure gas into the air spring to lift the air spring, i.e., raise the vehicle body. The air spring is deflated by the air supply unit (100) to lower the air spring, which in turn lowers the vehicle body. When the internal air pressure of the gas storage tank is lower than the specified limit, air is drawn from the external environment through the air supply unit (100) to achieve air spring lifting and lowering. When the compressor pump (153) overheats, the air spring directly exhausts air through the air supply unit (100) to achieve emergency descent of the air spring; When the internal air pressure of the gas storage tank is insufficient, the air supply unit (100) draws air from the external environment to build up pressure, thereby filling the gas storage tank with air. After the desiccant in the dryer (152) absorbs moisture, it is dried by reciprocating gas in the air supply unit (100) to achieve desiccant regeneration. The coaxial air spring maintains air pressure balance through the air supply unit (100) to achieve coaxial pressure compensation; When the air spring in the air storage tank needs to detect pressure, the pressure sensor (190) in the air supply unit (100) detects the internal air pressure of the air spring.

Images