CN114427493B - Supercharger and engine with same - Google Patents

Supercharger and engine with same Download PDF

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Publication number
CN114427493B
CN114427493B CN202210290063.XA CN202210290063A CN114427493B CN 114427493 B CN114427493 B CN 114427493B CN 202210290063 A CN202210290063 A CN 202210290063A CN 114427493 B CN114427493 B CN 114427493B
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China
Prior art keywords
pressure stage
exhaust gas
inlet end
supercharger
turbine
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CN202210290063.XA
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CN114427493A (en
Inventor
唐碧艳
姚建明
丁豪
陆树一
徐涛
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F02B37/162—Control of the pumps by bypassing charging air by bypassing, e.g. partially, intake air from pump inlet to pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

A turbocharger includes a turbine section including a volute component having only one exhaust gas inlet end and one exhaust gas outlet end, a high pressure stage turbine, and a low pressure stage turbine, and a first flow path structure disposed between the exhaust gas inlet end and the exhaust gas outlet end for connection of a gas flow path between the high pressure stage turbine, the low pressure stage turbine, the exhaust gas inlet end, and the exhaust gas outlet end, the first flow path structure including a valve assembly for regulating a flow rate of exhaust gas flowing into the turbine section through the high pressure stage turbine and a flow rate of exhaust gas flowing through the low pressure stage turbine. Through structural optimization, the pipeline connection structure of the supercharger is simplified, the whole structure is more compact, and the occupied space is smaller.

Description

Supercharger and engine with same
Technical Field
The invention relates to the technical field of engine supercharging, in particular to a supercharger and an engine with the supercharger.
Background
Currently, two-stage turbocharging technology of an engine is generally implemented by providing two separate turbochargers. The two turbochargers are arranged on an exhaust manifold of the engine in a serial or parallel mode, and the pipeline connection structure is complex and occupies large space.
Disclosure of Invention
The invention aims to provide a supercharger and an engine with the supercharger, and through structural optimization, the pipeline connection structure of the supercharger is simplified, the whole structure is more compact, and the occupied space is smaller.
In order to solve the above technical problems, the present invention provides a supercharger, comprising a turbine section including a volute component, a high-pressure stage turbine and a low-pressure stage turbine, the volute component having only one exhaust gas inlet end and one exhaust gas outlet end, the volute component further including a first flow path structure provided between the exhaust gas inlet end and the exhaust gas outlet end for connection of a gas flow path between the high-pressure stage turbine, the low-pressure stage turbine, the exhaust gas inlet end and the exhaust gas outlet end, the first flow path structure including a valve assembly for regulating a flow rate of exhaust gas flowing into the turbine section through the high-pressure stage turbine and a flow rate flowing through the low-pressure stage turbine.
The turbocharger is provided with a high-pressure turbine and a low-pressure turbine in a turbine part, the volute part of the turbine part is only provided with an exhaust gas inlet end and an exhaust gas outlet end, and the exhaust gas inlet end and the exhaust gas outlet end are connected with a gas flow path between the high-pressure turbine and the low-pressure turbine in a runner mode on the volute part, namely, a gas flow path connecting structure between the two-stage turbines is integrated in the volute part, so that the turbocharger has good sealing performance and is beneficial to reducing energy loss; therefore, the turbine part of the two-stage turbine is only provided with one exhaust gas inlet end, the design that the existing two-stage turbine needs to be provided with two inlets is avoided, and an external complex pipeline is arranged between the two-stage turbines.
The supercharger as described above, the first flow path structure includes a first flow path, a second flow path, and a third flow path;
the first flow passage is communicated with the exhaust gas inlet end and the inlet end of the high-pressure stage turbine, and the second flow passage is communicated with the exhaust gas inlet end and the outlet end of the high-pressure stage turbine;
the outlet end of the high-pressure stage turbine is communicated with the inlet end of the low-pressure stage turbine through a connecting runner, and the outlet end of the low-pressure stage turbine is communicated with the exhaust gas outlet end;
the third flow passage is communicated with the exhaust gas inlet end and the outlet end of the low-pressure stage turbine;
the valve assembly includes a valve member for regulating the flow of exhaust gas into the first flow passage and the flow of exhaust gas into the second flow passage, and a bypass valve; the bypass valve is adjustable in flow and is arranged in the third flow passage.
The supercharger as described above, the scroll member includes a high-pressure stage scroll portion, a low-pressure stage scroll portion, and a transition housing portion connecting the high-pressure stage scroll portion and the low-pressure stage scroll portion.
In the supercharger, the volute component is of an integral structure, or the high-pressure volute part, the low-pressure volute part and the transition volute part are of a split structure, and the parts are detachably connected.
The supercharger as described above, the supercharger including a puck section having only one air inlet end and one air outlet end, a high pressure stage puck and a low pressure stage puck, the puck section further including a second flow path structure disposed between the air inlet end and the air outlet end for connection of a gas flow path between the high pressure stage puck, the low pressure stage puck, the air inlet end and the air outlet end.
The booster comprises the second flow passage structure, wherein the second flow passage structure comprises a fourth flow passage, the fourth flow passage is communicated with the inlet end of the high-pressure stage pinch roller and the air outlet end, and the fourth flow passage is provided with a switch valve;
the outlet end of the low-pressure-stage pinch roller is communicated with the inlet end of the high-pressure-stage pinch roller through a connecting runner, and the inlet end of the low-pressure-stage pinch roller is communicated with the air inlet end.
The supercharger as described above, the housing member includes a high-pressure stage housing portion, a low-pressure stage housing portion, and a connection housing portion connecting the high-pressure stage housing portion and the low-pressure stage housing portion.
According to the supercharger, the shell pressing component is of an integral structure, or the high-pressure stage shell pressing part, the low-pressure stage shell pressing part and the connecting shell part are of a split structure, and all parts are detachably connected.
The invention also provides an engine comprising an exhaust manifold and an exhaust pipe, and further comprising a supercharger according to any one of the above, wherein the outlet end of the exhaust manifold is connected with the exhaust gas inlet end of the turbine section, and the exhaust gas outlet end of the turbine section is connected with the exhaust pipe.
The invention also provides an engine, which comprises an exhaust manifold, an intake manifold, a supercharger arranged between the exhaust manifold and the intake manifold, and a controller, wherein the supercharger is the supercharger, and the controller is used for controlling the opening degree of the valve assembly and the on-off state of the switch valve according to the rotating speed of the engine.
Since the above-described supercharger has the above-described technical effects, the engine including the supercharger also has the same technical effects, and the discussion is not repeated here.
Drawings
FIG. 1 is a simplified illustration of one embodiment of an engine with a supercharger provided by the present disclosure;
FIG. 2 is a schematic illustration of the supercharger of FIG. 1 in a first mode of operation;
FIG. 3 is a schematic illustration of the supercharger of FIG. 1 in a second mode of operation;
FIG. 4 is a schematic illustration of the supercharger of FIG. 1 in a third mode of operation;
fig. 5 is a schematic diagram of the supercharger of fig. 1 in a fourth mode of operation.
Reference numerals illustrate:
engine 10, exhaust manifold 11, intake manifold 12, intercooler 13, exhaust pipe 14, air filter 15;
an exhaust gas inlet port 2A, an exhaust gas outlet port 2B, a high-pressure stage turbine 21, a low-pressure stage turbine 22, a first flow path 231, a second flow path 232, a third flow path 233, a connecting flow path one 234, a valve member 24, a bypass valve 25;
an air inlet end 3A, an air outlet end 3B, a high-pressure stage pinch roller 31, a low-pressure stage pinch roller 32, a fourth runner 331, a connecting runner two 332 and a switching valve 34.
Detailed Description
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Without loss of generality, the engine and the supercharger shown in the drawings are taken as description main bodies in the embodiment, and the structural arrangement of the scheme is described in detail.
For ease of understanding and brevity of description, the following description is provided in conjunction with a supercharger and an engine having the supercharger, and the description of the advantageous portions will not be repeated.
Referring to fig. 1, fig. 1 is a simplified diagram of an engine with a supercharger according to an embodiment of the present invention.
The engine 10 includes a block and an intake manifold 12 and an exhaust manifold 11 connected to the block, with a four-cylinder engine block diagram being shown by way of example. It is to be understood that the number of cylinders of engine 10, the particular structural arrangement and layout of intake manifold 12 and exhaust manifold 11, etc. are not central to the invention of the present application and may take on existing designs and are not described in detail herein.
The engine 10 is provided with a supercharger, and the structure of the supercharger is designed in an optimized manner.
In this embodiment, the supercharger comprises a turbine section including a scroll member, a high-pressure stage turbine 21 and a low-pressure stage turbine 22, both the high-pressure stage turbine 21 and the low-pressure stage turbine 22 being provided in the scroll member, the scroll member being provided with only one exhaust gas inlet end 2A and one exhaust gas outlet end 2B.
The turbine part is mounted on the exhaust manifold 11 of the engine 10, specifically, the exhaust gas inlet end 2A of the scroll member is connected with the total outlet end of the exhaust manifold 11, and in practical application, a flange connection mode can be adopted, and the exhaust gas outlet end 2B of the scroll member is connected with the exhaust pipe 14 of the engine 10.
The volute component of the turbine component further comprises a first flow path structure provided between the exhaust gas inlet end 2A and the exhaust gas outlet end 2B for connection of a gas flow path between the high pressure stage turbine 21, the low pressure stage turbine 22, the exhaust gas inlet end 2A and the exhaust gas outlet end 2B.
As described above, compared with the existing two-stage turbocharging structure, the turbocharger integrates the gas flow path connection structure between the two-stage turbines in the volute component, so that the turbine part can only have one exhaust gas inlet end 2A and one exhaust gas outlet end 2B, the design that two inlet connections are required when the existing two-stage turbocharging structure is connected with an exhaust manifold is avoided, and the gas pipeline connected with the two-stage turbines is avoided from being arranged outside, thus the complexity of pipeline connection of the turbine part can be reduced, the overall structure of the turbocharger is more compact, and the occupied space is relatively reduced; meanwhile, the relevant pipeline connection structures of the high-pressure stage turbine 21 and the low-pressure stage turbine 22 are arranged on the volute component in the form of a first flow channel structure, so that the tightness can be ensured, the energy loss is reduced, and the reliability of the supercharger is improved.
As shown in fig. 1, in this embodiment, the first flow channel structure includes a first flow channel 231, a second flow channel 232, a third flow channel 233, and a plurality of connecting flow channels; specifically, the first flow passage 231 communicates with the exhaust gas inlet end 2A and the inlet end of the high-pressure stage turbine 21, the second flow passage 232 communicates with the exhaust gas inlet end 2A and the inlet end of the low-pressure stage turbine 22, the outlet end of the high-pressure stage turbine 21 communicates with the inlet end of the low-pressure stage turbine 22 through the first connecting flow passage 234, the outlet end of the low-pressure stage turbine 22 communicates with the exhaust gas outlet end 2B through another connecting flow passage (not shown), and the third flow passage 233 communicates with the exhaust gas inlet end 2A and the outlet end of the low-pressure stage turbine 22.
That is, the exhaust gas flowing in through the exhaust gas inlet end 2A of the scroll member may flow into the high-pressure stage turbine 21 through the first flow passage 231, may flow into the low-pressure stage turbine 22 through the second flow passage 232, and may flow directly into the exhaust pipe 14 through the third flow passage 233 without passing through the turbine, and the exhaust gas discharged from the high-pressure stage turbine 21 flows into the low-pressure stage turbine 22.
The first flow passage structure is further provided with a valve assembly for adjusting the flow rate of the exhaust gas flowing into the turbine part through the high-pressure stage turbine 21 and the flow rate of the exhaust gas flowing through the low-pressure stage turbine 22, i.e. the on-off and the opening degree of each flow passage are controlled by the valve assembly so as to adjust the working state of the turbine part according to the requirement.
In particular, in the illustrated embodiment, the valve assembly includes the valve member 24 and the bypass valve 25, wherein the valve member 24 is disposed at the junction of the exhaust gas inlet end 2A and the first and second flow passages 231 and 232, and it can be considered that a three-way valve is formed at the junction of the exhaust gas inlet end 2A and the first and second flow passages 231 and 232, and the valve member 24 can be in the form of a three-way valve which can regulate the flow rate of the exhaust gas flowing into the first flow passage 231 and the flow rate of the exhaust gas flowing into the second flow passage 232, that is, the flow rate of the exhaust gas flowing into the high-pressure stage turbine 21 and the flow rate of the exhaust gas flowing into the low-pressure stage turbine 22.
In other embodiments, the first flow channel 231 and the second flow channel 232 may not be connected, and they are relatively independently communicated with the exhaust gas inlet end 2A, and a valve element with adjustable flow rate is respectively arranged on each flow channel, which can achieve the above effect.
The bypass valve 25 is provided in the third flow path 233, and the opening degree thereof is also adjustable.
In this embodiment, the scroll member may generally include a high-pressure stage scroll portion, a low-pressure stage scroll portion, and a transition housing portion connecting the two, and the first flow passage structure may be formed in the scroll member, specifically, the shape, locus, etc. of each flow passage in each housing portion may be set as needed, and the present invention is not limited thereto as long as the connection requirement of the gas flow passage can be satisfied.
Specifically, if the assembly is convenient, the scroll part can be in an integrally formed structure without interference, and of course, for the convenience of processing, the three parts of the scroll part can also be in a split structure and then be connected together in a detachable mode.
In this embodiment, the supercharger further includes a pinch roller portion corresponding to the turbine portion, the pinch roller portion includes a housing member, a high-pressure stage pinch roller 31 and a low-pressure stage pinch roller 32, the high-pressure stage pinch roller 31 and the low-pressure stage pinch roller 32 are disposed in the housing member, and it is apparent that the high-pressure stage pinch roller 31 is coaxially connected with the high-pressure stage turbine 21, and the low-pressure stage pinch roller 32 is coaxially connected with the low-pressure stage turbine 22.
The press wheel part is mounted on the intake manifold 12 of the engine 10, specifically, the air inlet end 3A of the press wheel part is connected with the air filter 15 of the engine 10, the air outlet end 3B is connected with the total inlet end of the intake manifold 12, and an intercooler 13 is arranged between the press wheel part of the engine 10 and the intake manifold 12.
Similarly, the press housing component further includes a second flow path structure provided between the air inlet end 3A and the air outlet end 3B for connection of the gas flow paths between the high pressure stage pinch roller 31, the low pressure stage pinch roller 32, the air inlet end 3A and the air outlet end 3B.
As shown in fig. 1, in this embodiment, the second flow path structure includes a fourth flow path 331 and a plurality of connecting flow paths; specifically, the fourth flow passage 331 communicates the outlet end of the low-pressure stage pinch roller 32 with the outlet end of the high-pressure stage pinch roller 31, the inlet end of the low-pressure stage pinch roller 32 communicates with the air inlet end 3A through a connecting flow passage (not labeled in the figure), the outlet end of the low-pressure stage pinch roller 32 communicates with the inlet end of the high-pressure stage pinch roller 31 through a connecting flow passage two 332, and the outlet end of the high-pressure stage pinch roller 31 communicates with the air outlet end 3B through another connecting flow passage (not labeled in the figure).
That is, air entering the pinch roller portion through air inlet 3A may flow into intake manifold 12 through low pressure stage pinch roller 32, high pressure stage pinch roller 31, or may flow into intake manifold 12 through low pressure stage pinch roller 32 and fourth flow passage 331. Specifically, the flow path of the air is controlled by providing the on-off valve 34 on the fourth flow passage 331.
After the arrangement, only one connecting part is arranged between the pinch roller part of the supercharger and the air inlet manifold 12, compared with the existing two-stage turbocharging structure, the complexity of a connecting pipeline can be reduced, the structure of the pinch roller part is simplified, the pinch roller part is more compact, and the occupied space is further reduced; of course, the provision of the second flow path structure inside the pressure housing part also enables improved tightness and reduced energy consumption.
In this embodiment, the pressure housing portion may include a high-pressure stage pressure housing portion, a low-pressure stage pressure housing portion, and a connection housing portion connecting the two, and the second flow path structure may be formed in the pressure housing member, specifically, the shape, track, and the like of each flow path in each housing portion may be set as needed, and the connection requirement of the gas flow path may be satisfied without limitation.
Specifically, if the assembly is convenient, there is no interference, the shell pressing component can be in an integrated structure, and of course, for convenient processing, the three parts of the shell pressing component can also be in a split structure and then are connected together in a detachable mode.
As shown in fig. 1, the air path connection structure of the pinch roller portion is relatively simple, and in other embodiments, the turbine portion of the supercharger may be in the foregoing manner, and the pinch roller portion may still be in the existing manner.
In addition, in other embodiments, the flow channel structure design of the turbine part and/or the flow channel structure design of the pinch roller part may not be limited to the manner shown in fig. 1, and may be adjusted according to practical application requirements, so long as the external connection pipeline is modified to be integrated in the volute component and/or the pinch roller component, which all belong to the inventive concept of the present application.
Accordingly, the engine provided by the invention can comprise the supercharger provided by any one of the embodiments.
In the example shown in fig. 1, the following describes in detail the respective control modes of the supercharger after the application of the illustrated supercharger.
Specifically, engine 10 is provided with a controller that communicates with each valve element of the supercharger to adjust the operating state of each valve element in accordance with the rotational speed of engine 10.
Referring to FIG. 2, FIG. 2 illustrates a first mode of operation of the supercharger in which the engine 10 is operating at low speed, with the conductive flow path, i.e., the gas flow path, illustrated in bold solid lines; at this time, the controller controls the bypass valve 25 to be closed, the valve member 24 is adjusted to communicate the passage between the exhaust gas inlet end 2A and the first flow passage 231, the passage between the exhaust gas inlet end 2A and the second flow passage 232 is blocked, and the switching valve 34 is controlled to be closed, so that the exhaust gas discharged from the engine 10 through the exhaust manifold 11 passes through the high-pressure stage turbine 21, drives the high-pressure stage turbine 21 to rotate, drives the high-pressure stage pinch roller 31 to operate, and the low-pressure stage supercharging portion (including the low-pressure stage turbine 22 and the low-pressure stage pinch roller 32) is used only as a circulation pipeline, and does not play a substantial supercharging role, so that the problem of insufficient power of the engine 10 at a low speed is solved.
Referring to FIG. 3, FIG. 3 illustrates a second mode of operation of the supercharger in which the engine 10 is operating at a medium speed, with the conductive flow path illustrated in bold solid lines; at this time, the controller controls the bypass valve 25 to be closed, the switching valve 34 to be closed, and the valve member 24 to be adjusted to the position to simultaneously conduct the exhaust gas inlet end 2A, the first flow passage 231 and the second flow passage 232, so that a part of the exhaust gas discharged from the engine 10 through the exhaust manifold 11 passes through the high-pressure stage turbine 21, drives the high-pressure stage turbine 21 to rotate to drive the high-pressure stage pinch roller 31 to work, and the other part of the exhaust gas passes through the low-pressure stage turbine 22 to drive the low-pressure stage turbine 22 to rotate to drive the low-pressure stage pinch roller 32 to work, namely, the high-pressure stage supercharging part and the low-pressure stage supercharging part simultaneously work, thereby ensuring the smoothness of switching, the stable increase of power and the high torque output in a larger rotating speed range.
Referring to FIG. 4, FIG. 4 illustrates a third mode of operation of the supercharger in which the engine 10 is operating at high speeds, with the conductive flow path illustrated in bold solid lines; at this time, the controller controls the bypass valve 25 to be closed, the switching valve 34 to be opened, and the valve member 24 to be opened to a position where only the exhaust gas inlet end 2A and the second flow passage 232 are conducted, that is, the passage between the exhaust gas inlet end 2A and the first flow passage 231 is blocked, so that the exhaust gas discharged from the engine 10 through the exhaust manifold 11 passes through the low-pressure stage turbine 22, drives the low-pressure stage turbine 22 to rotate, drives the low-pressure stage pinch roller 32 to operate, and the high-pressure stage supercharging portion (including the high-pressure stage turbine 21 and the high-pressure stage pinch roller 31) is used only as a circulation line, and does not play a substantial supercharging role, and at this time, mainly operates by means of the low-pressure supercharging portion.
Referring to fig. 5, fig. 5 shows a fourth operation mode of the supercharger, in which the engine 10 is in a supercharger protection condition, the controller controls the bypass valve 25 to be opened, the switching valve 34 to be opened, and the valve member 24 to a position where only the exhaust gas inlet end 2A and the second flow passage 232 are conducted, i.e., the passage between the exhaust gas inlet end 2A and the first flow passage 231 is blocked, so that a part of the exhaust gas discharged from the engine 10 through the exhaust manifold 11 is directly discharged from the exhaust pipe 14 through the third flow passage 233, and the other part is driven to rotate through the low-pressure stage turbine 22, driving the low-pressure stage pressure wheel 32 to operate.
The above-mentioned definition of the rotation speed interval of each working condition of the engine 10 may be set according to actual needs, and the definition of the rotation speed interval may be different for different types of engines 10.
The supercharger and the engine with the supercharger provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (9)

1. A supercharger comprising a turbine section including a volute component having only one exhaust gas inlet end and one exhaust gas outlet end, a high pressure stage turbine and a low pressure stage turbine, the volute component further including a first flow path structure disposed between the exhaust gas inlet end and the exhaust gas outlet end for connection of a gas flow path between the high pressure stage turbine, the low pressure stage turbine, the exhaust gas inlet end and the exhaust gas outlet end, the first flow path structure including a valve assembly for regulating flow of exhaust gas flowing into the turbine section through the high pressure stage turbine and flow through the low pressure stage turbine;
the first flow channel structure comprises a first flow channel, a second flow channel and a third flow channel;
the first flow passage is communicated with the exhaust gas inlet end and the inlet end of the high-pressure stage turbine, and the second flow passage is communicated with the exhaust gas inlet end and the outlet end of the high-pressure stage turbine;
the outlet end of the high-pressure stage turbine is communicated with the inlet end of the low-pressure stage turbine through a connecting runner, and the outlet end of the low-pressure stage turbine is communicated with the exhaust gas outlet end;
the third flow passage is communicated with the exhaust gas inlet end and the outlet end of the low-pressure stage turbine;
the valve assembly includes a valve member for regulating the flow of exhaust gas into the first flow passage and the flow of exhaust gas into the second flow passage, and a bypass valve; the bypass valve is adjustable in flow and is arranged in the third flow passage.
2. The supercharger of claim 1 wherein the volute component comprises a high pressure stage volute portion, a low pressure stage volute portion, and a transition housing portion connecting the high pressure stage volute portion and the low pressure stage volute portion.
3. The supercharger of claim 2 wherein the scroll member is of unitary construction or the high pressure stage scroll portion, the low pressure stage scroll portion and the transition housing portion are of split construction with removable connection therebetween.
4. A supercharger according to any one of claims 1 to 3, comprising a puck section comprising a puck housing member having only one air inlet end and one air outlet end, a high pressure puck and a low pressure puck, the housing member further comprising a second flow path structure disposed between the air inlet end and the air outlet end for connection of a gas flow path between the high pressure puck, the low pressure puck, the air inlet end and the air outlet end.
5. The supercharger of claim 4 wherein the second flow path structure comprises a fourth flow path communicating the inlet end of the high pressure stage pinch roller with the air outlet end, the fourth flow path having an on-off valve thereon;
the outlet end of the low-pressure-stage pinch roller is communicated with the inlet end of the high-pressure-stage pinch roller through a connecting runner, and the inlet end of the low-pressure-stage pinch roller is communicated with the air inlet end.
6. The supercharger of claim 5 wherein the housing components comprise a high pressure stage housing section, a low pressure stage housing section and a connection housing section connecting the high pressure stage housing section and the low pressure stage housing section.
7. The supercharger of claim 6 wherein the housing components are of unitary construction or the high pressure stage housing sections, the low pressure stage housing sections and the connecting housing sections are of split construction with removable connections therebetween.
8. An engine comprising an exhaust manifold and an exhaust pipe, characterized by further comprising the supercharger of any one of claims 1 to 7, an outlet end of the exhaust manifold being connected to the exhaust gas inlet end of the turbine section, the exhaust gas outlet end of the turbine section being connected to the exhaust pipe.
9. The engine comprises an exhaust manifold, an intake manifold and a supercharger arranged between the exhaust manifold and the intake manifold, and is characterized in that the supercharger is a supercharger according to any one of claims 5-7, and the engine further comprises a controller for controlling the opening degree of the valve assembly and the on-off state of the switching valve according to the rotating speed of the engine.
CN202210290063.XA 2022-03-23 2022-03-23 Supercharger and engine with same Active CN114427493B (en)

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