CN217002045U - High-pressure air generating system and vehicle with same - Google Patents

Abstract

The utility model provides a high-pressure air generating system and a vehicle with the same, wherein the high-pressure air generating system comprises: the inlet end of the air compressor is communicated with the air inlet; the inlet end of the low-pressure air storage tank is communicated with the outlet end of the air compressor; the inlet end of the supercharger is communicated with the outlet end of the low-pressure air storage tank; the inlet end of the high-pressure air rail is communicated with the outlet end of the supercharger, and the high-pressure air rail is provided with an ejector which is used for ejecting high-pressure air with preset pressure into a pre-combustion chamber of the engine. The pressure of the high-pressure gas entering the precombustion chamber of the engine and participating in combustion can reach the pressure threshold value meeting the stable ignition of the active precombustion chamber, and the problem that the working requirement of the active precombustion chamber cannot be met by the pressure of the compressed air generated by the vehicle-mounted compressed air pump in the prior art is solved.

Description

High-pressure air generating system and vehicle with same

Technical Field

The utility model relates to the technical field of vehicles, in particular to a high-pressure air generating system and a vehicle with the same.

Background

With the stricter of oil consumption and emission regulations, the improvement of the heat efficiency of the gasoline engine becomes an important means for life and death of the traditional energy vehicle, and the important means for improving the heat efficiency is to improve the compression ratio of the engine at present, but the higher the compression ratio is, the higher the possibility of knocking under a heavy load working condition is. The temperature of the whole working cycle can be reduced through an exhaust gas recirculation technology, the occurrence of knocking can be effectively inhibited, meanwhile, the heat efficiency of the engine can be theoretically improved by improving the EGR rate, but the ignition of the engine is more and more difficult along with the improvement of the EGR rate, and the realization of stable ignition faces huge challenges.

The active precombustion chamber is used for igniting, namely high-pressure air and fuel are injected into the precombustion chamber to form a theoretical air-fuel ratio mixed gas, the theoretical air-fuel ratio mixed gas is not influenced by the EGR rate of an engine, stable ignition is realized in the local space of the precombustion chamber, and then the main combustion chamber mixed gas is ignited, the ignition capability of the main combustion chamber can be greatly improved by the combustion mode, stable ignition under the condition of ultrahigh EGR rate is realized, an important factor for realizing stable ignition of the active precombustion chamber is that a stable high-pressure air source is needed, the pressure of compressed air is more than 2MPa, most of the compressed air generated by the conventional vehicle-mounted compressed air pump is about 0.8MPa, and the working requirement of the active precombustion chamber cannot be met.

In view of the above problems, there is currently no effective solution.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a high-pressure air generating system and a vehicle with the same, and aims to solve the problem that the working requirement of an active prechamber cannot be met by the pressure of compressed air generated by a vehicle-mounted compressed air pump in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a high pressure air generating system including: the inlet end of the air compressor is communicated with the air inlet; the inlet end of the low-pressure air storage tank is communicated with the outlet end of the air compressor; the inlet end of the supercharger is communicated with the outlet end of the low-pressure air storage tank; the inlet end of the high-pressure air rail is communicated with the outlet end of the supercharger, and the high-pressure air rail is provided with an ejector which is used for ejecting high-pressure air with preset pressure into a pre-combustion chamber of the engine.

Further, a low-pressure relief valve is arranged on the low-pressure air storage tank.

Further, the high pressure air generating system includes: and the low-pressure regulating valve is arranged on a pipeline communicated between the low-pressure air storage tank and the supercharger.

Further, the high pressure air generating system includes: and the high-pressure gas storage tank is arranged on a pipeline for communicating the supercharger and the high-pressure gas rail.

Further, the high pressure air generating system further comprises: and the filter is arranged on a pipeline for communicating the supercharger with the high-pressure air storage tank.

Further, a high-pressure relief valve is arranged on the high-pressure air storage tank.

Further, the high pressure air generating system includes: and the pressure regulating valve is arranged on a pipeline for communicating the high-pressure air storage tank with the high-pressure air rail.

Furthermore, the preset pressure of the jet flow of the ejector is P, wherein P is more than or equal to 2 MPa.

Further, the supercharger is a pneumatic booster pump.

According to another aspect of the present invention, there is provided a vehicle including the high-pressure air generating system described above.

By applying the technical scheme, the high-pressure air generating system comprises an air compressor, a low-pressure air storage tank, a supercharger and a high-pressure air rail, external air is compressed to a certain pressure through the air compressor and is stored in the low-pressure air storage tank, the air pressure is further increased through the supercharger, the external air enters the high-pressure air rail and is injected into the pre-combustion chamber of the engine by the injector to participate in combustion, the pressure of the high-pressure air entering the pre-combustion chamber of the engine to participate in combustion can reach a pressure threshold value meeting the stable ignition of the active pre-combustion chamber, and the problem that the working requirement of the active pre-combustion chamber cannot be met due to the pressure of compressed air generated by a vehicle-mounted compressed air pump in the prior art is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic block diagram of an embodiment of a prior art on-board air supply system;

fig. 2 shows a schematic structural view of an embodiment of the high-pressure air generating system according to the utility model.

Wherein the figures include the following reference numerals:

1. an air inlet; 2. an air compressor; 3. a low pressure gas reservoir; 4. a low pressure relief valve; 5. a low pressure regulating valve; 6. a supercharger; 7. a filter; 8. a high pressure gas storage tank; 9. a high pressure relief valve; 10. a pressure regulating valve; 11. a high pressure gas rail; 12. a temperature pressure sensor; 13. an ejector; 14. a power source.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

As shown in fig. 1, the structural schematic diagram of a vehicle-mounted air source system in the prior art is shown, the vehicle-mounted air source system includes a base, a control motor, an air compressor main unit, an oil-gas separator, the oil-gas separator, an oil filter and an oil cooler, the control motor, the oil-gas separator and the oil cooler are all installed on the base, and the air compressor main unit, the oil filter and the oil-gas fine separator are all installed above the oil-gas separator. The compressed air is directly discharged from the air outlet of the oil-gas separator to be used by the pneumatic device, but the compressed air provided by the vehicle-mounted air source system cannot meet the working requirement of the active prechamber.

Referring to FIG. 2, a high pressure air generating system is provided according to an exemplary embodiment of the present application.

Specifically, as shown in fig. 2, the high-pressure air generating system includes an air compressor 2, a low-pressure air tank 3, a supercharger 6, and a high-pressure air rail 11. The inlet end of the air compressor 2 communicates with the air inlet 1. The inlet end of the low-pressure air storage tank 3 is communicated with the outlet end of the air compressor 2. The inlet end of the supercharger 6 is communicated with the outlet end of the low-pressure air storage tank 3. The inlet end of the high-pressure air rail 11 is communicated with the outlet end of the supercharger 6, the high-pressure air rail 11 is provided with an ejector 13, and the ejector 13 is used for ejecting high-pressure air with preset pressure into a pre-combustion chamber of the engine.

By applying the technical scheme of the embodiment, the high-pressure air generating system comprises an air compressor 2, a low-pressure air storage tank 3, a supercharger 6 and a high-pressure air rail 11, external air is firstly compressed to a certain pressure through the air compressor 2 and is stored in the low-pressure air storage tank 3, the air pressure is further increased through the supercharger 6, the external air enters the high-pressure air rail 11 and is injected into a precombustion chamber of the engine by an injector 13 to participate in combustion, the pressure of the high-pressure air entering the precombustion chamber of the engine to participate in combustion can reach a pressure threshold value meeting the stable ignition of the active precombustion chamber, and the problems that the compressed air pressure generated by a vehicle-mounted compressed air pump in the prior art cannot meet the working requirement of the active precombustion chamber are solved.

The low-pressure air storage tank 3 is provided with a low-pressure relief valve 4. The safety of the low-pressure gas storage tank can be ensured by arranging the low-pressure relief valve 4. Further, the high pressure air generating system includes: and the low-pressure regulating valve 5 is arranged on a pipeline communicated between the low-pressure air storage tank 3 and the supercharger 6. In the embodiment, the power source 14 of the air compressor 2 drives the air compressor 2 to compress the air at normal temperature and normal pressure to 0.8MPa, the air is stored in the low-pressure air storage tank 3, the supercharger 6 is driven through the low-pressure regulating valve 5, and the air is lifted to 4MPa, so that the application requirement of the active prechamber is met, when the EGR rate is increased, the engine cannot catch fire difficultly, and a foundation is laid for the application of ultrahigh EGR rate. The function of the low-pressure regulating valve 5 is to ensure that the pressure entering the supercharger 6 is constant and that the supercharger 6 is safely operated.

In one embodiment of the present application, the air compressor 2 may be in the form of a piston or a screw. The power source 14 of the air compressor 2 may be an engine or an electric motor. The piston compressor consists of a transmission system, a compression system, a cooling system, a lubricating system, an adjusting system and a safety protection system. When the power source 14 of the piston compressor is a motor, the piston compressor and the motor are fixed on the base through bolts, the base is fixed on the foundation through anchor bolts, and the motor directly drives the crankshaft through the coupling during operation to drive the connecting rod, the crosshead and the piston rod, so that the piston reciprocates in the cylinder of the piston compressor, and the processes of suction, compression, discharge and the like are completed. The piston compressor is a double-acting compressor, and air is sucked, compressed and discharged in the upward or downward movement process of the piston. When the air compressor 2 is a screw air compressor, the screw air compressor is composed of a screw machine head, a motor, an oil-gas separation barrel, a cooling system, an air conditioning system, a lubricating system, a safety valve, a control system and the like. The whole machine is arranged in a box body, is integrated into a whole and can be directly placed on a flat cement ground without being fixed on a foundation by a foundation bolt. The screw machine head is a double-shaft positive displacement rotary compressor head. A pair of high precision main (male) and sub (female) rotors are horizontally and parallelly arranged in the casing, the main (male) rotor has 5 teeth, and the sub (female) rotor has 6 teeth. The diameter of the main rotor is large, and the diameter of the auxiliary rotor is small. The teeth are formed into a spiral shape, and the teeth are meshed with each other. The two ends of the main rotor and the auxiliary rotor are respectively supported and positioned by bearings. When the motor works, the motor directly drives the main rotor through the coupling (or the belt), and the main rotor directly drives the auxiliary rotor to rotate together due to the mutual meshing of the two rotors. The cooling liquid is sprayed directly from the nozzle in the lower part of the compressor casing to the meshed rotor part and mixed with air to take away the heat produced by compression, so as to reach the cooling effect and form liquid film to prevent the direct contact between the metal and the rotor and to seal the gap between the rotor and the casing. The main components of the screw air compressor are a screw machine head and an oil-gas separation channel, the screw machine head sucks air through an air suction filter and an air inlet control valve, meanwhile, oil is injected into an air compression chamber, the machine head is cooled and sealed, a screw and a bearing are lubricated, the compression chamber generates compressed air, oil-gas mixed gas generated after compression is discharged into an oil-gas separation barrel, and most of oil is separated from the oil-gas mixture due to the action of mechanical centrifugal force and gravity. The air passes through an oil-gas separation simple core made of borosilicate glass fibers, almost all oil mist is separated, oil separated from the oil-gas separation simple core returns to the screw machine head through an oil return pipe, a filter is arranged on the oil return pipe, and clean oil flows back to the screw machine head after the oil return is filtered by the oil filter. After the oil is separated out, the compressed air leaves the oil cylinder through the minimum pressure control valve and enters the aftercooler, the aftercooler cools the compressed air and then discharges the cooled compressed air to the air storage tank for use by each gas unit, and the condensed water is stored in the air storage tank in a centralized manner and is discharged through an automatic drainer or manually.

The high pressure air generating system includes a high pressure air tank 8. The high-pressure air storage tank 8 is arranged on a pipeline which is communicated with the supercharger 6 and the high-pressure air rail 11. Further, the high pressure air generating system also comprises a filter 7. The filter 7 is provided on a pipe for communicating the supercharger 6 and the high-pressure gas tank 8. The arrangement is such that the high-pressure air whose pressure is raised by the supercharger 6 enters the filter 7 first, and impurities such as water vapor of the high-pressure air are filtered by the filter 7, so that the purity of the high-pressure air entering the high-pressure air storage tank 8 can be ensured.

The high-pressure air storage tank 8 is provided with a high-pressure relief valve 9. The safety of the high-pressure gas storage tank 8 can be ensured by providing the high-pressure relief valve 9. Further, the high pressure air generating system includes: and the pressure regulating valve 10 is arranged on a pipeline for communicating the high-pressure air storage tank 8 with the high-pressure air rail 11, and the pressure regulating valve 10 is arranged on the pipeline. The pressure of the high-pressure air entering the high-pressure air rail 11 can be adjusted according to the working condition requirement of the engine by arranging the pressure regulating valve 10, so that the pressure of the high-pressure air is in the use range of the active prechamber. Wherein the pressure regulating valve 10 may be an electrically controlled pressure regulating valve.

The preset pressure of the jet flow of the ejector 13 is P, wherein P is more than or equal to 2 MPa. In the present embodiment, the number of the injectors 13 is plural, the plural injectors 13 are uniformly provided on the high pressure gas rail 11, and the injectors 13 may be ordinary injectors. The high-pressure air pressure that sets up like this and has further guaranteed to jet into in the engine precombustion chamber can satisfy the operating requirement of initiative precombustion chamber, and wherein, the high-pressure air generating system of this application can promote automobile-used compressed air pressure value to 4MPa, can not only satisfy the high-pressure air user demand of initiative precombustion chamber engine, has laid a foundation for the application of super high EGR rate technique moreover.

The booster 6 is a pneumatic booster pump. The pneumatic booster pump can boost low-pressure compressed air to high-pressure using the compressed air as a power source. The pneumatic booster pump is a plunger pump with a piston reciprocating motion controlled by a two-position four-way pilot valve, and adopts a structure that a large gas piston is connected with a small-diameter hydraulic plunger. The area ratio of the two pistons is used to generate a pressure ratio by means of which the maximum output pressure can be calculated. The number in the pneumatic booster pump model is the rated boost ratio of the pump, and the outlet pressure can be set through a simple gas pressure reducing valve. The pneumatic booster pump has wide application range, and can be filled with water, oil and chemical media. The driving pressure ranges from 1.5 to 10 bar.

In another embodiment of the present application, a temperature and pressure sensor 12 is further mounted on the high pressure air rail 11. The temperature and pressure sensor 12 is used for monitoring the temperature and pressure of the high-pressure air in the high-pressure air rail 11 and correcting the high-pressure air injection pulse width. The arrangement improves the reliability of the high-pressure air rail 11, and further ensures that the high-pressure air pressure injected into the engine pre-combustion chamber can meet the working requirement of the active pre-combustion chamber.

According to another specific embodiment of this application, there is also provided a vehicle including the high-pressure air generating system of the above embodiment.

Use the high-pressure air generation system of this application, utilize 6 compressed air that will produce conventional automobile-used compressor of booster to promote, through be provided with air-vent valve 10 between high-pressure gas holder 8 and high-pressure air rail 11 in addition to be provided with temperature pressure sensor 12 on high-pressure air rail 11, can control compressed air's pressure, improved high-pressure air generation system's reliability, thereby guaranteed that the high-pressure air who generates satisfies the demand of initiative prechamber technique to high-pressure air.

According to another embodiment of the present application, there is provided an SUV (Sport Utility Vehicle) Vehicle having the high-pressure air generating system in the above-described embodiment.

In the present embodiment, the high-pressure air generating system includes: the air compressor 2, the low-pressure air storage tank 3, the supercharger 6 and the high-pressure air rail 11. The external air is firstly compressed to a certain pressure through the air compressor 2 and stored in the low-pressure air storage tank 3, the air pressure is further improved through the supercharger 6, the external air enters the high-pressure air rail 11 and is injected into the pre-combustion chamber of the engine by the injector 13 to participate in combustion, the pressure of the high-pressure air entering the pre-combustion chamber of the engine and participating in combustion can reach a pressure threshold value meeting the stable ignition of the active pre-combustion chamber, and the problem that the working requirement of the active pre-combustion chamber cannot be met due to the compressed air pressure generated by a vehicle-mounted compressed air pump in the prior art is solved.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be appreciated that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the utility model to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A high pressure air generating system, comprising:

the inlet end of the air compressor (2) is communicated with the air inlet (1);

the inlet end of the low-pressure air storage tank (3) is communicated with the outlet end of the air compressor (2);

the inlet end of the supercharger (6) is communicated with the outlet end of the low-pressure air storage tank (3);

the high-pressure gas rail (11), the entrance point of high-pressure gas rail (11) with the exit end intercommunication setting of booster (6), high-pressure gas rail (11) are provided with sprayer (13), sprayer (13) are used for spouting the high-pressure gas of preset pressure to in the precombustion chamber of engine.

2. The high pressure air generating system of claim 1,

and the low-pressure gas storage tank (3) is provided with a low-pressure relief valve (4).

3. The high pressure air generating system of claim 1, comprising:

the low-pressure regulating valve (5) is arranged on a pipeline communicated between the low-pressure air storage tank (3) and the supercharger (6).

4. A high pressure air generating system according to any one of claims 1 to 3, characterized in that it comprises:

the high-pressure air storage tank (8) is arranged on a pipeline communicated with the supercharger (6) and the high-pressure air rail (11).

5. The high pressure air generating system of claim 4, further comprising:

and the filter (7), the filter (7) is arranged on a pipeline for communicating the supercharger (6) with the high-pressure air storage tank (8).

6. The high pressure air generating system of claim 4,

and a high-pressure relief valve (9) is arranged on the high-pressure gas storage tank (8).

7. The high pressure air generating system of claim 4, comprising:

the pressure regulating valve (10), the pressure regulating valve (10) sets up on the pipeline that communicates high-pressure gas holder (8) with high-pressure gas rail (11).

8. A high pressure air generating system according to claim 1, wherein the preset pressure of the jet of air of the ejector (13) is P, wherein P ≧ 2 MPa.

9. A high-pressure air generating system according to claim 1, characterized in that the pressure booster (6) is a pneumatic booster pump.

10. A vehicle comprising a high-pressure air generating system, characterized in that the high-pressure air generating system is the high-pressure air generating system of any one of claims 1 to 9.

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