CN218235253U - Engine supercharging system and engine - Google Patents
Engine supercharging system and engine Download PDFInfo
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- CN218235253U CN218235253U CN202221116309.3U CN202221116309U CN218235253U CN 218235253 U CN218235253 U CN 218235253U CN 202221116309 U CN202221116309 U CN 202221116309U CN 218235253 U CN218235253 U CN 218235253U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The application discloses an engine supercharging system which comprises a lubricating medium containing cavity and at least two superchargers, wherein each supercharger is communicated with the lubricating medium containing cavity through a lubricating oil pipeline and is constructed to form a lubricating loop for the superchargers; the engine supercharging system also comprises a negative pressure generating device connected with the lubricating medium containing cavity; and when the rotating speed of the engine reaches the opening rotating speed threshold of the negative pressure generating device and at least one supercharger stops working, the negative pressure generating device works to reduce the pressure in the lubricating medium containing cavity. The application also discloses an engine using the supercharging system. According to the lubricating oil circulation system, the negative pressure generating device is arranged, when the rotating speed of the engine reaches a set threshold value and at least one supercharger stops working, the pressure in the lubricating medium containing cavity is reduced, the lubricating flow path forms pressure difference, the flowing performance of lubricating oil can be effectively improved, and the lubricating oil flowing through the partial non-working supercharger is prevented from leaking.
Description
Technical Field
The application belongs to the technical field of diesel engines, and particularly relates to an engine supercharging system and an engine.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
The sequential superchargers are supercharging systems consisting of more than two turbochargers. With the increase of the rotating speed and the load of the engine, the plurality of turbochargers work in succession; therefore, the matching contradiction between the engine and the supercharger is solved, and the low working condition performance of the engine is improved. Specifically, when the engine speed and load are lower than a certain set value, the exhaust gas supply of part of the turbochargers needs to be cut off, so that the exhaust gas of the engine can intensively flow through the turbine of the supercharger in the working state, and the efficiency of the turbocharging system is further improved.
In the practical application process, when partial superchargers do not work, the pressure in the turbine box and the air compressor of the supercharger is low due to the high pressure in the lubricating medium containing cavity, and the pressure of the lubricating oil continuously supplied is high, so that the lubricating oil leaks into the turbine box and the air compressor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of supercharger oil leak in succession of the engine at least. The purpose is realized by the following technical scheme:
the utility model provides an engine supercharging system in a first aspect, which comprises a lubricating medium containing cavity and at least two superchargers, wherein each supercharger is communicated with the lubricating medium containing cavity through a lubricating oil pipeline and is constructed to form a lubricating loop for the superchargers; the engine supercharging system also comprises a negative pressure generating device connected with the lubricating medium accommodating cavity; and when the rotating speed of the engine reaches the opening rotating speed threshold of the negative pressure generating device and at least one supercharger stops working, the negative pressure generating device works to reduce the pressure in the lubricating medium containing cavity.
According to the utility model discloses an engine supercharging system, this application reaches the settlement threshold value through setting up negative pressure generating device at engine speed, and at least one booster stop work the effect of negative pressure generating device makes the pressure drop of lubricating medium appearance intracavity makes the lubricated flow path form pressure differential, can improve the flow property of lubricating oil effectively, avoids lubricating oil to leak in the turbine case or the compressor of the booster that stops work.
In addition, according to the utility model discloses an engine supercharging system still can have following additional technical characterstic:
in some embodiments of the present invention, it is further preferable that the negative pressure generating device has a set opening speed threshold value, and the opening speed threshold value of the negative pressure generating device is lower than the engine speed when all the superchargers are opened.
In some embodiments of the present invention, it is further preferable that the connection between the negative pressure generating device and the lubricant containing chamber is located in a gas phase region in the lubricant containing chamber.
In some embodiments of the invention, it is further preferred that the lubricant reservoir is provided as a crankcase of the engine or as a separately provided lubricant reservoir.
In some embodiments of the present invention, it is further preferable that at least one of the superchargers is set as a common supercharger, and the others are controlled superchargers; and when the rotating speed of the engine reaches the opening rotating speed threshold of the negative pressure generating device and at least one controlled supercharger stops working, the negative pressure generating device works to reduce the pressure in the lubricating medium containing cavity.
In some embodiments of the present invention, it is further preferable to set the common superchargers to one, two, three, or four or more; and/or the controlled superchargers are set to be one, two, three, four or more than five.
A second aspect of the present invention provides an engine, including the control unit and any one of the aforementioned embodiments the engine supercharging system, the negative pressure generating device of the engine supercharging system with the control unit electricity is connected, the control unit is used for controlling the operating condition of the negative pressure generating device.
In some embodiments of the present invention, the control unit is configured to control the negative pressure generating device to operate when the engine speed reaches an opening speed threshold of the negative pressure generating device and at least one of the superchargers does not operate; and when all the superchargers are in a working state or the rotating speed of the engine is less than the threshold value of the starting rotating speed of the negative pressure generating device, controlling the negative pressure generating device to stop working.
In some embodiments of the present invention, at least one of the superchargers is set as a common supercharger, and the rest are controlled superchargers, and the controlled superchargers are all electrically connected to the control unit, and all the operating states of the controlled superchargers are controlled by the control unit.
In some embodiments of the present invention, the control unit is configured to control the plurality of superchargers to be turned on one by one according to a load and a rotation speed of the engine.
In the present application, the number is included in a certain number or more, and two or more, for example.
In the present application, the term "conventional supercharger" refers to a supercharger that is always in a supercharging operation state when the engine is in an operation state.
In the present application, the "controlled supercharger" refers to a supercharger whose supercharging operation state is controlled, and specifically, for example, the operation state of the controlled supercharger is controlled by a control unit.
This application is through setting up negative pressure generating device to through reasonable design, at the engine operation in-process, when partial booster is out of work, guarantee that the lubrication circuit of turbocharging system is unobstructed, avoid because the too big lubricating oil leakage's that leads to flowing through partial inoperative booster problem of pressure differential in the flow path, and then reach the purpose of protection booster. In addition, the problem of lubricating oil leakage of sequential pressurization can be effectively solved through simple arrangement, and the method has great application and popularization values.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an engine supercharging system according to an embodiment of the present invention;
fig. 2 is a control logic diagram of an engine supercharging system according to an embodiment of the present invention.
The reference numbers are as follows:
1, a lubricating medium containing cavity;
21 a conventional booster, 22 a controlled booster;
3 lubricating the oil pipeline;
4 negative pressure generating device.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such 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 the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both an up and down orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
According to the embodiment of the utility model, the application provides an engine supercharging system, including a lubricating medium containing cavity 1 and at least two superchargers, each of the superchargers is communicated with the lubricating medium containing cavity 1 through a lubricating oil pipeline 3, and is constructed to form a lubricating loop for the superchargers; the engine supercharging system also comprises a negative pressure generating device 4 connected with the lubricating medium accommodating cavity 1; when the rotating speed of the engine reaches a set threshold value and at least one supercharger stops working, the negative pressure generating device 4 works to reduce the pressure in the lubricating medium accommodating cavity 1.
In practical applications, the negative pressure generating device 4 can be selectively set as a vacuum pump. It should be noted that, when the lubricating medium accommodating cavity 1 is implemented specifically, it is not particularly limited, and it may be adaptively set according to a specific application scenario; for example, in a specific embodiment, the lubricant receiving chamber 1 may be selectively configured as a crankcase of the engine, and the lubricant receiving chamber 1 may also be configured as a separately provided storage container for storing the lubricant. In addition, the lubricating medium in the lubricating medium accommodating cavity 1 in the present application is not specifically limited, and may be any medium that can meet the lubricating requirement, and the lubricating medium may be selectively set as lubricating oil, specifically set as engine oil. In order to enable the negative pressure generating device 4 to work better, in particular the connection of the negative pressure generating device 4 to the lubricant reservoir 1 is located in the gas phase region of said lubricant reservoir. This application reaches the settlement threshold value through setting up negative pressure generating device at engine speed, and at least one booster stop work the effect of negative pressure generating device makes the pressure in the lubricated medium holds the intracavity descends, and then makes the lubricated flow path form pressure differential, can improve the fluidity of lubricating oil effectively, avoids lubricating oil to leak in the turbine case or the compressor of the booster that stops work.
In addition, the "circuit configured to lubricate the supercharger" in the present application is not limited to the lubrication flow path between the supercharger and the negative pressure generating device, and the lubrication flow path between the supercharger and the negative pressure generating device may be selectively used as a part of the circuit of the engine lubrication system.
As a preferred embodiment of the present application, in implementation, at least one of the superchargers is selectively set as a common supercharger 21, and the rest are controlled superchargers 22; when at least one controlled supercharger 22 stops working, the negative pressure generating device works to reduce the pressure in the lubricating medium cavity.
As a preferred embodiment of the present application, in the concrete implementation, the number of the common superchargers 21 may be one, two, three, or four or more; and/or, the controlled booster 22 is set to one, two, three, four, five or more. Further, it is possible to selectively set one of the normal superchargers 21 and two of the controlled superchargers 22; alternatively, one common supercharger 21 and three controlled superchargers 22 are provided, as shown in fig. 1; alternatively, one common supercharger 21 and four controlled superchargers 22 are provided; alternatively, one common supercharger 21 and five controlled superchargers 22 are provided; alternatively, two normal superchargers 21 and two controlled superchargers 22 are provided; alternatively, two normal superchargers 21 and three controlled superchargers 22 are provided; alternatively, two normal superchargers 21 and four controlled superchargers 22 are provided. It should be noted that the number of the conventional superchargers and the controlled superchargers is not particularly limited, and may be selectively set according to actual needs. Wherein the arrows in figure 1 represent the direction of flow of the lubricating medium.
As a preferred embodiment of the present application, the negative pressure generating device is selectively made to have a set opening rotational speed threshold, and the opening rotational speed threshold of the negative pressure generating device 4 is lower than the engine rotational speed when all the superchargers are opened. The threshold value of the activation rotational speed of the negative pressure generating device 4 is set with reference to the engine rotational speed and/or the load. Specifically, for example, when part of the controlled supercharger 22 is operated, the negative pressure generating device 4 is operated, and in the rest of the engine, the negative pressure generating device 4 is not operated; it is to be noted that, when all the controlled superchargers 22 are in the operating state, the negative pressure generating device 4 stops operating; when the engine is started, the negative pressure generating device 4 is also in a stopped state.
As a preferred embodiment of the present application, when embodied, the engine supercharging system described in all the foregoing embodiments may further be selectively configured as a sequential supercharging system of the engine.
The embodiment of the application also discloses an engine, which comprises a control unit and the engine supercharging system of any one of the previous embodiments, wherein the negative pressure generating device is electrically connected with the control unit, and the control unit is used for controlling the working state of the negative pressure generating device. When the control unit is implemented, the control unit can be further selectively set as an ECU of an engine or a separately arranged control unit for controlling the working state of the negative pressure generating device; specifically, the Control Unit is an ECU (Electronic Control Unit) of the engine.
In specific implementation, the controlled superchargers 22 are all electrically connected with the control unit, and the working states of all the controlled superchargers 22 are controlled by the control unit. As a preferred embodiment of the present application, the control unit may be further selectively configured to control the plurality of controlled superchargers 22 to be turned on one by one according to the load and the rotation speed of the engine. Alternatively, some of the plurality of controlled boosters 22 may be selectively turned on simultaneously; for example, according to the requirement of the working condition of the engine, when the number of the controlled superchargers is more than three, two controlled superchargers in all the controlled superchargers can be further selectively opened and closed simultaneously; the specific configuration can be selectively set according to the actual design requirement, and a further explanation is not provided herein.
In specific implementation, the control unit is configured to control the negative pressure generation device to work when the engine speed reaches the set starting speed threshold of the negative pressure generation device and at least one controlled supercharger 22 does not work; and when all the controlled superchargers 22 are in the working state or the engine rotating speed is less than the set starting rotating speed threshold value of the negative pressure generating device, controlling the negative pressure generating device to stop working.
In all of the foregoing and alternative embodiments of the present application, in particular implementations, the engine boosting system may operate with reference to the control logic presented in FIG. 2; specifically, when the engine is started successfully, the negative pressure generating device defaults to a closed state; further, it is checked whether the engine rotation speed reaches an opening threshold of the negative pressure generating device, if the engine rotation speed does not reach the opening threshold, the negative pressure generating device is kept in a closed state, and if the engine rotation speed reaches the opening threshold, that is, the partially controlled supercharger 22 starts to operate, the negative pressure generating device starts to operate; when the controlled superchargers 22 are detected to start to work, the negative pressure generating device is stopped, and if only part of the controlled superchargers 22 are in the working state, the negative pressure generating device is kept in the working state.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An engine supercharging system, characterized in that,
the lubricating device comprises a lubricating medium containing cavity and at least two superchargers, wherein each supercharger is communicated with the lubricating medium containing cavity through a lubricating oil pipeline and is constructed into a loop for lubricating the superchargers;
the engine supercharging system also comprises a negative pressure generating device connected with the lubricating medium containing cavity.
2. The engine boosting system according to claim 1,
and the opening rotating speed threshold value of the negative pressure generating device is lower than the rotating speed of the engine when all the superchargers are opened.
3. The engine boosting system according to claim 1,
the connection part of the negative pressure generating device and the lubricating medium containing cavity is positioned in a gas phase area in the lubricating medium containing cavity.
4. The engine boosting system according to claim 1,
the lubricating medium accommodating cavity is arranged as a crankcase of the engine or an independently arranged lubricating medium storage container.
5. The engine boosting system according to any one of claims 1 to 4,
and when the rotating speed of the engine reaches the opening rotating speed threshold value of the negative pressure generating device and at least one controlled supercharger stops working, the negative pressure generating device works to reduce the pressure in the lubricating medium containing cavity.
6. An engine, characterized in that it comprises a cylinder,
the engine supercharging system comprises a control unit and the engine supercharging system according to any one of claims 1 to 5, wherein a negative pressure generating device of the engine supercharging system is electrically connected with the control unit, and the control unit is used for controlling the working state of the negative pressure generating device.
7. The engine of claim 6,
the control unit is configured to control the negative pressure generating device to work when the engine speed reaches an opening speed threshold value of the negative pressure generating device and at least one supercharger does not work; and when all the superchargers are in a working state or the rotating speed of the engine is less than the threshold value of the starting rotating speed of the negative pressure generating device, controlling the negative pressure generating device to stop working.
8. The engine according to claim 6 or 7,
at least one of the superchargers is set as a common supercharger, the rest superchargers are controlled superchargers, the controlled superchargers are electrically connected with the control unit, and the working states of all the controlled superchargers are controlled by the control unit.
9. The engine of claim 8,
the control unit is configured to control the plurality of controlled superchargers to be turned on one by one according to a load and a rotation speed of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116309.3U CN218235253U (en) | 2022-05-10 | 2022-05-10 | Engine supercharging system and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116309.3U CN218235253U (en) | 2022-05-10 | 2022-05-10 | Engine supercharging system and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218235253U true CN218235253U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221116309.3U Active CN218235253U (en) | 2022-05-10 | 2022-05-10 | Engine supercharging system and engine |
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| CN (1) | CN218235253U (en) |
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- 2022-05-10 CN CN202221116309.3U patent/CN218235253U/en active Active
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