Vehicle, air compressor system and control method of air compressor system

Abstract

The invention belongs to the technical field of engines, and particularly relates to a vehicle, an air compressor system and a control method of the air compressor system. The air compressor system comprises an air compressor, an air storage tank and a control unit. The air compressor comprises an air cylinder and a piston, the piston is arranged in the air cylinder and can reciprocate in the air cylinder, the end face of the piston and the inner wall of the air cylinder form a compression cavity, the air cylinder is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the compression cavity, and the air inlet is communicated with external atmosphere through an air inlet pipeline. The air inlet pipeline is provided with an air inlet valve used for controlling on-off of the air inlet pipeline. The gas storage tank is communicated with the exhaust port through an exhaust pipeline, and an exhaust valve used for controlling the on-off of the exhaust pipeline is arranged on the exhaust pipeline; the control unit is in signal connection with the air inlet valve and the exhaust valve and used for controlling the air inlet valve and the exhaust valve to act. According to the air compressor system in the technical scheme, noise can be effectively reduced, and the manufacturing cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of engines, and in particular relates to a vehicle, an air compressor system and a control method thereof. Background Art

[0002] Automobile air compressor, also known as automobile air compressor, is a device that converts the mechanical energy of the prime mover into gas pressure energy. It plays a vital role in the automotive field and is mainly used to compress gas. As the core component of the gas source device, the air compressor can compress the gas and provide it to various systems of the car, such as the braking system, air conditioning system, etc. Its existence ensures that the stable demand for compressed gas in the operation of the car is met.

[0003] The combination of air compressor and gas storage tank is widely used. The existence of gas storage tank can make the air compressor provide compressed gas stably without frequent starting and stopping. When the demand for gas in the automobile system fluctuates within a certain range, the gas storage tank can release or store gas, thereby avoiding frequent starting of the air compressor. This can not only reduce energy consumption, but also reduce the wear of the air compressor and extend its service life. In addition, the gas storage tank can also ensure the continuous supply of compressed gas to the automobile system when the air compressor fails or needs maintenance.

[0004] In actual operation, the air compressor compresses the gas and stores it in the gas tank. In order to meet the ever-changing gas consumption, the gas in the gas tank must maintain a certain pressure. At present, the gas pressure of most factories is 0.3Mpa~0.8MPa, and this pressure range can meet the gas demand of most automotive systems. In the traditional air compressor structure, a valve plate is set inside. During the compression process, the gas pressure needs to be adjusted in multiple stages. At each stage, the gas pressure needs to be controlled by the valve plate to ensure that the gas pressure is within the normal range. The opening and closing of the valve plate produces a lot of noise, resulting in poor comfort of the whole vehicle and affecting the driving experience.

[0005] Therefore, it is urgent to propose an air compressor system, a vehicle and a control method of the air compressor system to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide an air compressor system that can effectively reduce the noise generated by the air compressor during operation and improve the comfort of the entire vehicle. This object is achieved through the following technical solutions:

[0007] A first aspect of the present invention provides an air compressor system, comprising:

[0008] An air compressor, the air compressor comprising a cylinder and a piston, the piston being arranged inside the cylinder and capable of reciprocating inside the cylinder, the end surface of the piston and the inner wall of the cylinder forming a compression chamber, the cylinder being provided with an air inlet and an air outlet, the air inlet and the air outlet being respectively connected to the compression chamber, the air inlet being connected to the external atmosphere through an air inlet pipeline, the air inlet pipeline being provided with an air inlet valve, the air inlet valve being used to control the on-off of the air inlet pipeline;

[0009] An air storage tank, the air storage tank is connected to the exhaust port through an exhaust pipeline, an exhaust valve is provided on the exhaust pipeline, and the exhaust valve is used to control the on-off of the exhaust pipeline;

[0010] A control unit is respectively connected to the intake valve and the exhaust valve signals, and is used to control the actions of the intake valve and the exhaust valve respectively.

[0011] In the air compressor system described in the technical solution, the air compressor abandons the traditional internal valve plate design and installs the intake valve and exhaust valve on the intake pipeline and the exhaust pipeline respectively. During the working process, the volume of the compression chamber changes periodically through the reciprocating motion of the piston inside the cylinder, thereby realizing the compression process of the gas. At the same time, the control unit controls the opening and closing actions of the intake valve and the exhaust valve according to the different working states of the air compressor, thereby controlling the on-off state of the intake pipeline and the exhaust pipeline to ensure the control of the gas flow direction. By adopting this structure, the air compressor can realize functions such as pumping, unloading of the air tank, and assisting the start and stop of the engine. Since the air compressor no longer uses the valve plate structure, the noise problem caused by the valve plate switching action can be significantly reduced. In addition, the air compressor compresses the gas through the reciprocating motion of the piston. This structural design is simple and reliable, stable in operation, and has good economic benefits.

[0012] In addition, the air compressor system of the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, a pressure detection unit is provided inside the gas storage tank, and the pressure detection unit is signal-connected to the control unit. The pressure detection unit is used to detect the internal pressure of the gas storage tank, and the control unit can control the operation of the intake valve and the exhaust valve according to the pressure signal detected by the pressure detection unit.

[0014] In some embodiments of the present invention, a position detection unit is provided on the air compressor, and the position detection unit is signal-connected to the control unit. The position detection unit is used to detect the position of the piston, and the control unit can control the operation of the intake valve and the exhaust valve according to the piston position signal detected by the position detection unit and the pressure signal detected by the pressure detection unit.

[0015] In some embodiments of the present invention, the exhaust valve is a two-position three-way valve, the first interface of the exhaust valve is connected to the air compressor, the second interface of the exhaust valve is connected to the air storage tank, and the third interface of the exhaust valve is connected to the air intake pipeline through an unloading pipeline;

[0016] The exhaust valve is configured such that when the internal air pressure of the air storage tank is greater than a preset air pressure upper limit value, the first interface is connected to the third interface, and the first interface is disconnected from the second interface.

[0017] In a second aspect of the present invention, a vehicle is proposed, which includes an engine and an air compressor system in the above-mentioned embodiment, wherein the engine and the control unit are signal-connected, the air tank and the engine are connected, and the control unit can control the operation of the intake valve and the exhaust valve according to the operating state of the engine.

[0018] In a third aspect of the present invention, a control method for an air compressor system is provided. The control method for an air compressor system includes the air compressor system or the vehicle in the above embodiment. The control method for an air compressor system includes the following steps:

[0019] According to the internal pressure of the gas storage tank being greater than a preset upper pressure limit, the control unit controls the intake valve to open and controls the exhaust valve to close.

[0020] In some embodiments of the present invention, based on the internal pressure of the gas storage tank being less than a preset lower pressure limit, the control unit controls the operation of the intake valve and the exhaust valve according to the position of the piston to pump air into the interior of the gas storage tank.

[0021] In some embodiments of the present invention, the control unit controls the actions of the intake valve and the exhaust valve according to the position of the piston, including:

[0022] According to the piston being located at the top dead center, the control unit controls the intake valve to open and controls the exhaust valve to close;

[0023] According to the piston being located at the bottom dead center, the control unit controls the intake valve to close, and controls the exhaust valve to open.

[0024] In some embodiments of the present invention, the control method of the air compressor system further includes the following steps:

[0025] When the engine is started, the control unit controls the opening of the intake valve and the exhaust valve according to the received start signal of the engine.

[0026] In some embodiments of the present invention, the control method of the air compressor system further includes the following steps:

[0027] When the engine is turned off, the control unit controls the intake valve and the exhaust valve to close according to the received engine turn-off signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 The structure diagram of an air compressor system according to an embodiment of the present invention is schematically shown;

[0030] Figure 2 A flow chart of a control method for an air compressor system according to an embodiment of the present invention is schematically shown;

[0031] Figure 3 A schematic structural diagram of another air compressor system according to an embodiment of the present invention is shown schematically.

[0032] The reference numerals in the accompanying drawings represent the following:

[0033] 100, air compressor; 110, air intake pipeline; 111, air intake valve; 120, exhaust pipeline; 121, exhaust valve; 130, position detection unit; 200, air storage tank; 210, pressure detection unit; 300, control unit; 400, dryer; a, first interface; b, second interface; c, third interface. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0037] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0038] The piston air compressor in the prior art mainly includes a cylinder, a valve and a piston. The piston reciprocates in the cylinder to continuously change the working volume. In the ideal working process without considering the volume loss and energy loss in the actual working process of the piston air compressor, the work completed by the crankshaft of the piston air compressor for each rotation can be divided into suction, compression and exhaust. During the compression process, the piston moves upward from the bottom dead center, the suction valve and the exhaust valve are in a closed state, and the gas is compressed in the closed cylinder. As the cylinder volume gradually decreases, the pressure and temperature gradually increase until the gas pressure in the cylinder is equal to the exhaust pressure. During the exhaust process, the piston continues to move upward, causing the gas pressure in the cylinder to be greater than the exhaust pressure, then the exhaust valve opens, and the gas in the cylinder is pushed by the piston to discharge the cylinder into the exhaust pipeline at an equal pressure until the piston moves to the top dead center. At this time, due to the effect of the exhaust valve spring force and the gravity of the valve plate itself, the exhaust valve closes and the exhaust ends. During the entire working process of the air compressor, the gas pressure needs to be controlled by the valve plate at each stage, and the opening and closing of the valve plate will produce a large mechanical noise. For cars using engines, the noise generated by the operation of the whole vehicle is at most 90-110db, so the noise generated by the piston air compressor is not obvious. But for electric vehicles, the noise generated by the piston air compressor is a huge noise source. In order to avoid such noise, electric vehicles all use rotary vane air compressors, but the cost of rotary vane air compressors is greatly increased compared to piston air compressors. Therefore, how to effectively reduce the noise of piston air compressors is crucial to the development of electric vehicles. In addition, most existing piston air compressors are controlled by mechanical air pressure switches. Due to the limitation of fatigue strength, the reliability and life of the mechanical air pressure switch are greatly reduced. Once the mechanical switch fails, it may cause the vehicle to experience a sharp drop in air pressure, insufficient braking force, or even brake failure. The air compressor system provided by this technical solution can effectively solve the above technical problems.

[0039] Figure 1 The structural diagram of an air compressor system according to an embodiment of the present invention is schematically shown. Figure 2 The flow chart of the control method of the air compressor system according to the embodiment of the present invention is schematically shown. Figure 1 and Figure 2As shown, the present invention proposes an air compressor system, including an air compressor 100, an air storage tank 200 and a control unit 300; the air compressor 100 includes a cylinder and a piston, the piston is arranged inside the cylinder and can reciprocate inside the cylinder, the end face of the piston and the inner wall of the cylinder form a compression chamber, the cylinder is provided with an air inlet and an exhaust port, the air inlet and the exhaust port are respectively connected to the compression chamber, the air inlet is connected to the external atmosphere through an air inlet pipeline 110, the air inlet pipeline 110 is provided with an air inlet valve 111, the air inlet valve 111 is used to control the on-off of the air inlet pipeline 110; the air storage tank 200 is connected to the exhaust port through an exhaust pipeline 120, the exhaust pipeline 120 is provided with an exhaust valve 121, the exhaust valve 121 is used to control the on-off of the exhaust pipeline 120; the control unit 300 is respectively connected to the air inlet valve 111 and the exhaust valve 121 by signal, and is used to control the actions of the air inlet valve 111 and the exhaust valve 121 respectively.

[0040] In the air compressor system described in the technical solution, the air compressor 100 abandons the traditional internal valve plate design, and instead installs an intake valve 111 and an exhaust valve 121 on the intake pipeline 110 and the exhaust pipeline 120 respectively. During operation, the volume of the compression chamber changes periodically through the reciprocating motion of the piston inside the cylinder, thereby realizing the gas compression process. At the same time, the control unit 300 controls the opening and closing actions of the intake valve 111 and the exhaust valve 121 according to the different working states of the air compressor 100, thereby controlling the on-off state of the intake pipeline 110 and the exhaust pipeline 120 to ensure the control of the gas flow direction. By adopting this structure, the air compressor 100 can realize functions such as pumping, unloading the gas tank 200, and assisting the start and stop of the engine. Since the air compressor 100 no longer uses a valve plate structure, the noise problem caused by the valve plate switching action can be significantly reduced. In addition, the air compressor 100 compresses gas through the reciprocating motion of the piston. This structural design is simple and reliable, and the operation is stable. At the same time, it has good economic benefits.

[0041] Exemplarily, during the engine start-up process, the control unit 300 controls both the intake valve 111 and the exhaust valve 121 to be open, and the gas enters the engine through the air compressor system, reducing the running resistance of the engine and the engine start-up power consumption, thereby making the engine start-up smoother and having a certain positive effect on saving fuel.

[0042] During the engine shutdown process, the control unit 300 controls the intake valve 111 and the exhaust valve 121 to close, stop the air intake to the engine, increase the running resistance of the engine, thereby accelerating the engine shutdown, which in turn helps to save fuel, reduce emissions, and reduce noise, and has a positive effect on improving the comfort of the vehicle shutdown condition.

[0043] During the operation of the engine, when the internal pressure of the gas tank 200 is greater than the preset pressure upper limit, the gas tank 200 needs to be unloaded. In this process, the control unit 300 controls the exhaust valve 121 to close and the intake valve 111 to open. At this time, the intake of air to the gas tank 200 is stopped, and the air compressor 100 performs internal circulation unloading. The internal circulation of the air compressor 100 refers to the process in which the gas is cyclically compressed inside the air compressor 100 during the operation of the air compressor 100. This process maintains the stability of the gas pressure in the system and improves the operating efficiency of the engine. Secondly, this process helps to improve the compression efficiency of the air compressor 100, because the gas is cyclically compressed multiple times inside the air compressor 100, which can fully utilize energy. In addition, the internal circulation can reduce the waste of gas and reduce production costs. In this embodiment, the preset pressure upper limit is 0.8MPa. In other embodiments, the preset pressure upper limit can also be 0.75MPa or 0.7MPa, etc., which can be set according to actual needs.

[0044] Furthermore, during the operation of the engine, when the internal pressure of the gas tank 200 is less than the preset lower limit of pressure, the air compressor 100 is required to pump air. In this process, when the piston inside the cylinder is at the top dead center, the intake valve 111 is opened, the exhaust valve 121 is closed, and as the piston moves downward, the gas enters the cylinder from the intake pipe 110; when the piston is at the bottom dead center, the intake valve 111 is closed, the exhaust valve 121 is opened, and as the piston moves upward, the gas inside the cylinder enters the gas tank 200 through the exhaust pipe 120, and so on. In this embodiment, the preset lower limit of pressure is 0.4MPa. In other embodiments, the preset lower limit of pressure can also be 0.45MPa or 0.5MPa, etc., which can be set according to actual needs.

[0045] Optionally, both the inlet valve 111 and the exhaust valve 121 are solenoid valves. Solenoid valves can provide precise flow and pressure control, have rapid response, are highly programmable, have low energy consumption and are environmentally friendly, and have the characteristics of high reliability and low maintenance cost, and are very suitable for the control of gas circulation in this technical solution.

[0046] Optionally, the control unit 300 is an ECU (Electronic Control Unit) or a VCU (Vehicle Control Unit).

[0047] Furthermore, a pressure detection unit 210 is provided inside the gas storage tank 200, and the pressure detection unit 210 is signal-connected to the control unit 300. The pressure detection unit 210 is used to detect the internal pressure of the gas storage tank 200, and the control unit 300 can control the operation of the intake valve 111 and the exhaust valve 121 according to the pressure signal detected by the pressure detection unit 210.

[0048] Since the gas in the gas tank 200 must always maintain a certain pressure during the operation of the engine, the pressure detection unit 210 is required to detect the internal pressure of the gas tank 200 in real time and feed it back to the control unit 300 so that the control unit 300 can send instructions according to the pressure signal. For example, when the pressure detection unit 210 detects that the internal pressure of the gas tank 200 is greater than the preset pressure upper limit, the control unit 300 controls the exhaust valve 121 to close and the intake valve 111 to open according to the pressure signal, so as to realize the unloading of the air compressor 100.

[0049] Optionally, the pressure detection unit 210 may be a resistive pressure sensor. The resistive pressure sensor has a simple structure, stable performance, and high measurement accuracy, and is very suitable for detecting the internal pressure of the gas storage tank 200 .

[0050] Furthermore, the air compressor 100 is provided with a position detection unit 130, and the position detection unit 130 and the control unit 300 are signal-connected. The position detection unit 130 is used to detect the position of the piston. The control unit 300 can control the operation of the intake valve 111 and the exhaust valve 121 according to the piston position signal detected by the position detection unit 130 and the pressure signal detected by the pressure detection unit 210.

[0051] Exemplarily, when the pressure detection unit 210 detects that the internal pressure of the gas storage tank 200 is less than the preset pressure lower limit, and at the same time, the position detection unit 130 detects that the piston is at the top dead center, the control unit 300 controls the intake valve 111 to open and the exhaust valve 121 to close according to the signal; when the pressure detection unit 210 detects that the internal pressure of the gas storage tank 200 is less than the preset pressure lower limit, and at the same time, the position detection unit 130 detects that the piston is at the top dead center, the control unit 300 controls the intake valve 111 to close and the exhaust valve 121 to open according to the signal. In this way, the air compressor 100 is inflated.

[0052] By detecting the piston position through the position detection unit 130, the volume of the compression chamber, that is, the compression of the gas, can be obtained, and the gas can be replenished into the gas storage tank 200 in a timely and efficient manner. Optionally, the position detection unit 130 can be a photoelectric switch, a magnetic switch or a proximity switch, which is specifically set according to actual needs and is not limited here.

[0053] See also Figure 3In one embodiment, the exhaust valve 121 is a two-position three-way valve, the first interface a of the exhaust valve 121 is connected to the air compressor 100, the second interface b of the exhaust valve 121 is connected to the air tank 200, and the third interface c of the exhaust valve 121 is connected to the intake pipeline 110 through an unloading pipeline; the exhaust valve 121 is configured such that when the internal air pressure of the air tank 200 is greater than a preset air pressure upper limit value, the first interface a and the third interface c are connected, and the first interface a and the second interface b are disconnected.

[0054] It can be understood that the valve of the two-position three-way valve has two working positions and three interfaces, namely the first interface a, the second interface b and the third interface c, and the gas flow direction is controlled by changing the working position of the valve. When the valve is in one working position, the gas flows from the first interface a to the second interface b, and the third interface c is closed; when the valve is in another working position, the gas flows from the first interface a to the third interface c, and the second interface b is closed.

[0055] In the case where the exhaust valve 121 adopts a two-position three-way valve, when the internal air pressure of the air tank 200 is greater than the preset upper limit of the air pressure, the gas inside the air compressor 100 will not flow to the air tank 200 after being discharged, but will return to the intake pipe 110 through the unloading pipeline, and then enter the interior of the air compressor 100 through the intake pipe 110 to achieve circulation. In this way, the compression efficiency of the air compressor 100 can be improved, energy can be fully utilized, and gas waste can be reduced. At the same time, the gas pressure in the system is maintained stable, and the operating efficiency of the engine is improved. Optionally, the outlet end of the unloading pipeline is connected to the upstream of the intake valve 111.

[0056] In some embodiments, a safety valve may be provided on the gas storage tank 200. When the internal pressure of the gas storage tank 200 is greater than a preset upper pressure limit, the safety valve opens. When the safety valve opens, the gas inside the gas storage tank 200 may be discharged into the atmosphere through the safety valve, thereby preventing the pressure from exceeding the limit that the gas storage tank 200 can withstand, and preventing dangerous accidents such as rupture or explosion of the gas storage tank 200 caused by excessive pressure. Optionally, the safety valve is an automatic pressure valve, such as a spring-loaded safety valve.

[0057] Optionally, the inside of the intake pipe 110 and the exhaust pipe 120 are respectively provided with a resistive silencer for silencing the intake noise and exhaust noise of the air compressor 100. The resistive silencer is composed of a tube and a chamber with a sudden interface, and the purpose of reducing noise is achieved by filtering out some low-frequency noise, and it is better than the resistive silencer in terms of moisture resistance, high temperature resistance, gas flow rate, cleanliness, etc. Optionally, the resistive silencer can be an expansion silencer, which is composed of various expansion chambers and connecting pipes, and uses the expansion and contraction of the cross-sectional area to cause the reflection and interference of sound waves to achieve the purpose of silencing, and the noise reduction cost is low.

[0058] Optionally, a soundproof cover is provided on the periphery of the air compressor 100 to reduce the mechanical noise of the air compressor 100. The soundproof cover includes an outer shell, a middle layer and an inner layer. The outer shell is made of an airtight metal material with a certain weight and rigidity. For example, the outer shell can be a 2 mm thick steel plate. The middle layer is a damping layer, and the inner layer is made of sound-absorbing material. By enclosing the noisy air compressor 100 with a soundproof cover, the outward transmission and diffusion of the mechanical noise of the air compressor 100 can be blocked, thereby reducing the impact of the mechanical noise on the surrounding environment.

[0059] Optionally, the air compressor system further includes a dryer 400, the inlet of the dryer 400 is connected to the air compressor 100 through the exhaust pipe 120, and the outlet of the dryer 400 is connected to the air storage tank 200. The dryer 400 is mainly used to remove moisture and pollutants in the air and improve the dryness and quality of the air. Optionally, the dryer 400 mainly includes a condenser, a filter, a cold dryer, a heater and a control system. The condenser is responsible for cooling the compressed air, condensing the water vapor and sediment therein, and then discharging it. The filter can remove impurities in the compressed air, such as oil stains, acid mist, etc., to ensure that the output dry air is clean and pollution-free. The cold dryer further cools the compressed air after cooling, condenses the moisture and impurities in the compressed air, and filters them out to ensure the dryness of the dry air. The heater will increase the temperature of the compressed air entering the dryer 400, so that the moisture in the air evaporates, thereby improving the dehumidification efficiency of the dryer 400. The control system controls the start, stop, coordination and cooperation of the various components of the dryer 400, thereby ensuring the smooth operation of the entire dryer 400 system.

[0060] Furthermore, the present technical solution also provides a vehicle, which includes an engine and the above-mentioned air compressor system, the engine and the control unit 300 are signal-connected, the air storage tank 200 is connected to the engine, and the control unit 300 can control the operation of the intake valve 111 and the exhaust valve 121 according to the operating state of the engine.

[0061] The vehicle provided by the present technical solution adopts the air compressor system in the above-mentioned embodiment, wherein the air compressor 100 is a piston air compressor 100, and the production cost is greatly reduced compared with the vehicle adopting the rotary vane air compressor 100 in the prior art. At the same time, the air compressor 100 in the present technical solution cancels the design of the valve plate in the traditional structure, thereby avoiding the mechanical noise caused by the opening and closing of the valve plate, and effectively improving the comfort of the whole vehicle. The gas compression process is controlled by the intake valve 111 and the exhaust valve 121, so that the air compressor system operates stably and efficiently, and the engine runs more smoothly.

[0062] Further, see Figure 2The present technical solution also provides a control method for an air compressor system, which is applied to the above-mentioned air compressor system or vehicle. The control method for the air compressor system includes the following steps: according to the internal pressure of the air storage tank 200 being greater than a preset pressure upper limit value, the control unit 300 controls the intake valve 111 to open, and controls the exhaust valve 121 to close.

[0063] Further, according to the internal pressure of the gas storage tank 200 being less than the preset lower pressure limit, the control unit 300 controls the operation of the intake valve 111 and the exhaust valve 121 according to the position of the piston to pump air into the gas storage tank 200 .

[0064] Furthermore, the control unit 300 controls the actions of the intake valve 111 and the exhaust valve 121 according to the position of the piston, including: when the piston is at the top dead center, the control unit 300 controls the intake valve 111 to open, and controls the exhaust valve 121 to close; when the piston is at the bottom dead center, the control unit 300 controls the intake valve 111 to close, and controls the exhaust valve 121 to open.

[0065] Furthermore, the control method of the air compressor system further includes the following steps: when the engine is started, the control unit 300 controls the opening of the intake valve 111 and the exhaust valve 121 according to the received engine start signal.

[0066] Furthermore, the control method of the air compressor system further includes the following steps: when the engine is turned off, the control unit 300 controls the intake valve 111 and the exhaust valve 121 to close according to the received engine turn-off signal.

[0067] Further, in one embodiment, the exhaust valve 121 in the air compressor system is a two-position three-way valve, the first interface a of the exhaust valve 121 is connected to the air compressor 100, the second interface b of the exhaust valve 121 is connected to the air storage tank 200, and the third interface c of the exhaust valve 121 is connected to the intake pipeline 110 through the unloading pipeline. In this embodiment, the control method of the air compressor system includes the following steps:

[0068] When the engine is started, the control unit 300 controls the intake valve 111 to open according to the received engine start signal, and controls the first interface a and the second interface b of the exhaust valve 121 to be connected (the first interface a and the third interface c are disconnected). At this time, the gas enters the engine through the air compressor system, making the engine start smoother.

[0069] When the engine is turned off, the control unit 300 controls the intake valve 111 to close according to the received engine flameout signal, and controls the first interface a and the second interface b of the exhaust valve 121 to be disconnected (the first interface a and the third interface c are connected). At this time, the gas stops being delivered to the engine, accelerating the engine flameout.

[0070] When the internal pressure of the gas storage tank 200 is greater than the preset upper pressure limit, the control unit 300 controls the air intake valve 111 to open, and controls the first interface a and the third interface c of the exhaust valve 121 to be connected (the first interface a and the second interface b are disconnected). In this case, the gas inside the air compressor 100 will not flow to the gas storage tank 200 after being discharged, but will return to the air intake pipeline 110 through the unloading pipeline, and then enter the interior of the air compressor 100 through the air intake pipeline 110 to achieve circulation.

[0071] When the internal pressure of the gas storage tank 200 is less than the preset lower pressure limit and the piston is at the top dead center, the control unit 300 controls the intake valve 111 to open, and controls the first interface a and the second interface b of the exhaust valve 121 to be disconnected (the first interface a and the third interface c are connected); when the piston is at the bottom dead center, the control unit 300 controls the intake valve 111 to close, and controls the first interface a and the second interface b of the exhaust valve 121 to be connected (the first interface a and the third interface c are disconnected). In this case, the gas inside the air compressor 100 can enter the gas storage tank 200 through the exhaust pipeline 120, so that the internal air pressure of the gas storage tank 200 increases.

[0072] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air compressor system, characterized in that: include: An air compressor (100), the air compressor (100) comprising a cylinder and a piston, the piston being arranged inside the cylinder and being capable of reciprocating inside the cylinder, the end surface of the piston and the inner wall of the cylinder forming a compression chamber, the cylinder being provided with an air inlet and an air outlet, the air inlet and the air outlet being respectively connected to the compression chamber, the air inlet being connected to the external atmosphere via an air inlet pipeline (110), the air inlet pipeline (110) being provided with an air inlet valve (111), the air inlet valve (111) being used to control the on-off of the air inlet pipeline (110); An air storage tank (200), the air storage tank (200) being connected to the exhaust port via an exhaust pipeline (120), the exhaust pipeline (120) being provided with an exhaust valve (121), the exhaust valve (121) being used to control the on / off of the exhaust pipeline (120); A control unit (300), wherein the control unit (300) is respectively connected to the intake valve (111) and the exhaust valve (121) via signals, and is used to respectively control the operation of the intake valve (111) and the exhaust valve (121).

2. The air compressor system according to claim 1, characterized in that: A pressure detection unit (210) is provided inside the gas storage tank (200), and the pressure detection unit (210) is signal-connected to the control unit (300). The pressure detection unit (210) is used to detect the internal pressure of the gas storage tank (200), and the control unit (300) can control the operation of the intake valve (111) and the exhaust valve (121) according to the pressure signal detected by the pressure detection unit (210).

3. The air compressor system according to claim 2, characterized in that: The air compressor (100) is provided with a position detection unit (130), and the position detection unit (130) and the control unit (300) are connected by signal. The position detection unit (130) is used to detect the position of the piston. The control unit (300) can control the operation of the intake valve (111) and the exhaust valve (121) according to the piston position signal detected by the position detection unit (130) and the pressure signal detected by the pressure detection unit (210).

4. The air compressor system according to any one of claims 1 to 3, characterized in that: The exhaust valve (121) is a two-position three-way valve, a first interface (a) of the exhaust valve (121) is in communication with the air compressor (100), a second interface (b) of the exhaust valve (121) is in communication with the air storage tank (200), and a third interface of the exhaust valve (121) is in communication with the air intake pipeline (110) via a load-relief pipeline; The exhaust valve (121) is configured such that when the internal air pressure of the air storage tank (200) is greater than a preset air pressure upper limit value, the first interface (a) and the third interface (c) are connected, and the first interface and the second interface are disconnected.

5. A vehicle, characterized in that: The invention comprises an engine and an air compressor system as claimed in any one of claims 1 to 4, wherein the engine and the control unit (300) are connected by signals, the air storage tank (200) is connected to the engine, and the control unit (300) can control the operation of the intake valve (111) and the exhaust valve (121) according to the operating state of the engine.

6. A control method for an air compressor system, characterized in that: Applied to the air compressor system according to any one of claims 1 to 3 or the vehicle according to claim 5, the control method of the air compressor system comprises the following steps: According to the internal pressure of the gas storage tank (200) being greater than a preset pressure upper limit value, the control unit (300) controls the air intake valve (111) to open, and controls the air exhaust valve (121) to close.

7. The control method of the air compressor system according to claim 6, characterized in that: When the internal pressure of the gas storage tank (200) is less than a preset lower pressure limit, the control unit (300) controls the operation of the intake valve (111) and the exhaust valve (121) according to the position of the piston, so as to pump air into the interior of the gas storage tank (200).

8. The control method of the air compressor system according to claim 7, characterized in that: The control unit (300) controls the operation of the intake valve (111) and the exhaust valve (121) according to the position of the piston, including: According to the piston being located at the top dead center, the control unit (300) controls the intake valve (111) to open, and controls the exhaust valve (121) to close; According to the piston being located at the bottom dead center, the control unit (300) controls the intake valve (111) to close, and controls the exhaust valve (121) to open.

9. The control method of the air compressor system according to claim 6, characterized in that: The control method of the air compressor system also includes the following steps: When the engine is started, the control unit (300) controls the opening of the intake valve (111) and the exhaust valve (121) according to a received start signal of the engine.

10. The control method of the air compressor system according to claim 6, characterized in that: The control method of the air compressor system also includes the following steps: When the engine is turned off, the control unit (300) controls the intake valve (111) and the exhaust valve (121) to close according to a received engine turn-off signal.

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