Exhaust brake butterfly valve device and engine assembly

Abstract

The utility model belongs to the technical field of engines, and particularly relates to an exhaust brake butterfly valve device and an engine assembly. The exhaust brake butterfly valve device comprises a base, a butterfly valve assembly, a driving assembly and a limiting assembly are arranged on the base, the butterfly valve assembly comprises a valve body and a valve plate, the valve body is connected with the base, the valve plate is rotatably arranged in the valve body and is in transmission connection with the driving assembly, and the driving assembly is used for driving the valve plate to rotate. The limiting assembly comprises a gas conveying pipe, the gas conveying pipe is connected with the base, and the gas conveying pipe is used for conveying limiting gas applying resistance to the driving assembly. By means of the exhaust brake butterfly valve device in the technical scheme, the problem that the exhaust pressure is too large due to the fact that the exhaust brake butterfly valve is fully closed at the high rotating speed and the high exhaust flow is effectively solved, and therefore the reliability problems of abrasion of a thrust bearing of a supercharger, overtemperature of an oil head of an oil sprayer and the like are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of engine, concretely relates to an exhaust brake butterfly valve device and engine assembly. BACKGROUND

[0002] The exhaust brake butterfly valve adjusts the output power of the engine by controlling the exhaust flow in the exhaust pipe. When the exhaust brake butterfly valve is closed, the exhaust flow is reduced, and a high-pressure area is formed in the exhaust pipe, thereby increasing the output torque and power of the engine; when the exhaust brake butterfly valve is opened, the exhaust flow is increased, and the pressure in the exhaust pipe is reduced, thereby reducing the output power of the engine.

[0003] Currently, the limiting structure in the exhaust brake butterfly valve is a screw fixed on the base, and the state of the exhaust brake butterfly valve can only be fully open or fully closed, and the opening of the exhaust brake butterfly valve cannot be dynamically controlled according to the exhaust flow of the engine. Under high speed and high exhaust flow, the exhaust brake butterfly valve is fully closed, which can easily cause excessive exhaust pressure, and further cause reliability problems such as wear of the booster thrust bearing and over-temperature of the oil head of the oil injector.

[0004] Therefore, it is urgent to propose an exhaust brake butterfly valve device and engine assembly to solve the above problems. SUMMARY

[0005] The utility model aims at at least solving the problem that the exhaust brake butterfly valve cannot dynamically adjust the opening. The purpose is realized by the following technical scheme:

[0006] The first aspect of the utility model proposes an exhaust brake butterfly valve device, which comprises a base, a butterfly valve assembly, a driving assembly and a limiting assembly are arranged on the base, the butterfly valve assembly comprises a valve body and a valve plate, the valve body is connected with the base, the valve plate is rotatably arranged in the valve body, the valve plate is drivingly connected with the driving assembly, the driving assembly is used for driving the valve plate to rotate, the limiting assembly comprises a gas conveying pipe, the gas conveying pipe is connected with the base, and the gas conveying pipe is used for conveying limiting gas which applies resistance to the driving assembly.

[0007] The exhaust brake butterfly valve device in the technical scheme supports other components through the base. In the working process, the driving assembly drives the valve plate to rotate, and the gas flow in the valve body changes in the rotating process of the valve plate. By providing the gas conveying pipe on the base, the limiting gas output by the gas conveying pipe exerts resistance on the driving assembly, and the driving assembly cannot drive the valve plate to rotate under the resistance. Therefore, the size of the resistance on the driving assembly can be changed by changing the gas pressure of the limiting gas, thereby limiting the rotating angle of the valve plate, and the opening degree of the butterfly valve assembly can be dynamically adjusted. By adopting this structure, the problem of excessive exhaust pressure caused by the full closing of the exhaust brake butterfly valve under high rotating speed and high exhaust flow is effectively avoided, thereby reducing the occurrence of reliability problems such as the wear of the thrust bearing of the supercharger and the over-temperature of the oil head of the fuel injector.

[0008] In addition, the exhaust brake butterfly valve device can further have the following additional technical features.

[0009] In some embodiments of the utility model, the exhaust brake butterfly valve device further comprises a transmission assembly, the transmission assembly comprises a first transmission rod and a second transmission rod, a first end of the first transmission rod is connected with the valve plate, a second end of the first transmission rod is hinged with the second transmission rod, one end of the second transmission rod away from the first transmission rod is connected with the driving assembly, the driving assembly is used for driving the second transmission rod to move along the axial direction of the second transmission rod, and the second transmission rod is used for driving the first transmission rod to rotate around the first end.

[0010] In some embodiments of the utility model, the driving assembly comprises a cylinder, a piston and a connecting rod, the cylinder is connected with the base, the piston is slidably arranged in the cylinder, the piston is connected with the transmission assembly through the connecting rod, an air inlet cavity is formed between the piston and the cylinder, when the air inlet cavity is in the air inlet state, the piston pushes the connecting rod to extend out of the cylinder, the valve plate tends to close the valve body, and when the piston drives the connecting rod to retract into the cylinder, the valve plate tends to open the valve body.

[0011] In some embodiments of the utility model, the valve plate is rotatably installed on the valve body around a first axis, and the cylinder is rotatably installed on the base around a second axis, and the first axis and the second axis are arranged in parallel.

[0012] In some embodiments of the utility model, one end of the second transmission rod away from the first transmission rod is threadedly connected with the connecting rod.

[0013] In some embodiments of the utility model, a spring is arranged in the cylinder, the spring is sleeved on the connecting rod, one end of the spring abuts against the piston, and the other end of the spring abuts against the inner wall of the cylinder.

[0014] In some embodiments of the utility model, the gas pipe is provided with an adjusting valve, and the adjusting valve is used for adjusting the flow of the limiting gas.

[0015] In some embodiments of the utility model, the valve body is connected to the base through a hoop, and the hoop is connected to the base through bolts.

[0016] In the second aspect of the utility model, an engine assembly is provided, which comprises the supercharger, the engine and the exhaust brake butterfly valve device in the above-mentioned embodiments, the engine is communicated with the supercharging outlet of the supercharger through an intake manifold, the engine is communicated with the supercharging inlet of the supercharger through an exhaust manifold, the valve body is arranged on the intake manifold, the valve disc is used for controlling the intake amount, the intake end of the gas pipe is communicated with the exhaust gas outlet of the supercharger, and the limiting gas is the exhaust gas of the supercharger.

[0017] In some embodiments of the utility model, the supercharger comprises a compressor and a turbine, the supercharging outlet is arranged on the outlet of the compressor, the supercharging inlet is arranged on the turbine, the exhaust gas outlet is arranged on the turbine, a fresh air inlet is arranged on the compressor, the exhaust gas of the engine can drive the turbine of the turbine to rotate, and the impeller of the compressor and the turbine of the turbine are coaxially driven. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other 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 accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present utility model. Moreover, the same reference numerals in the various drawings indicate the same or similar components. In the drawings:

[0019] Figure 1 The structure schematic view of the exhaust brake butterfly valve device according to the embodiments of the utility model is schematically shown in a certain visual angle;

[0020] Figure 2 The structure schematic view of the exhaust brake butterfly valve device according to the embodiments of the utility model is schematically shown in another visual angle;

[0021] Figure 3 The principle diagram of the exhaust brake butterfly valve and the supercharger after assembly according to the embodiments of the utility model is schematically shown.

[0022] The various signs in the drawings represent the following:

[0023] 10, exhaust brake butterfly valve device;

[0024] 100, base;

[0025] 200, butterfly valve assembly; 210, valve body; 220, valve disc;

[0026] 300, drive assembly; 310, cylinder; 320, connecting rod; 330, air intake port;

[0027] 400, limiting assembly; 410, air delivery pipe;

[0028] 500, transmission assembly; 510, first transmission rod; 520, second transmission rod;

[0029] 600, supercharger; 610, compressor; 611, intake manifold; 612, fresh air inlet; 620, turbine; 621, exhaust manifold; 622, exhaust outlet. DETAILED DESCRIPTION

[0030] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can 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 fully convey the scope of the present disclosure to those skilled in the art.

[0031] 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" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" 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 in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0032] Although the terms first, second, third, etc. can 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 can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and the like used herein do not imply a sequence or an order, but rather are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. 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 example embodiments.

[0033] For ease of description, spatial relative terms can be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inward", "outward", "lower", "below", "upper", "above", etc. Such spatial 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, an element described as "below" or "beneath" another element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative terms used herein interpreted accordingly.

[0034] Figure 1 A structural schematic view of the exhaust brake butterfly valve device 10 according to the embodiment of the present application is schematically shown in a certain view. Figure 2 A structural schematic view of the exhaust brake butterfly valve device 10 according to the embodiment of the present application is schematically shown in another view. As shown in Figure 1 and Figure 2 As shown in the figures, the present application provides an exhaust brake butterfly valve device 10, which comprises a base 100, a butterfly valve assembly 200, a driving assembly 300 and a limiting assembly 400 arranged on the base 100, the butterfly valve assembly 200 comprises a valve body 210 and a valve disc 220, the valve body 210 is connected with the base 100, the valve disc 220 is rotatably arranged in the valve body 210, the valve disc 220 is drivingly connected with the driving assembly 300, the driving assembly 300 is used for driving the valve disc 220 to rotate, the limiting assembly 400 comprises a gas conveying pipe 410, the gas conveying pipe 410 is connected with the base 100, and the gas conveying pipe 410 is used for conveying a limiting gas which exerts resistance on the driving assembly 300.

[0035] The exhaust brake butterfly valve device 10 in the technical solution supports other components through the base 100. During work, the driving assembly 300 drives the valve plate 220 to rotate, and the gas flow in the valve body 210 changes during the rotation of the valve plate 220. The limiting gas output by the gas conveying pipe 410 arranged on the base 100 exerts resistance on the driving assembly 300, and the driving assembly 300 cannot drive the valve plate 220 to rotate under the resistance. Therefore, the size of the resistance borne by the driving assembly 300 can be changed by changing the gas pressure of the limiting gas, so as to limit the rotation angle of the valve plate 220, and the opening of the butterfly valve assembly 200 can be dynamically adjusted. With this structure, the problem of excessive exhaust pressure caused by the full closing of the exhaust brake butterfly valve under high rotation speed and high exhaust flow is effectively avoided, thereby reducing the occurrence of reliability problems such as the wear of the thrust bearing of the supercharger 600 and the over-temperature of the oil head of the oil injector.

[0036] Optionally, the valve body 210 is connected to the bottom of the base 100. The axial direction of the valve body 210 is the length direction of the base 100. The driving assembly 300 and the limiting assembly 400 are arranged on the top of the base 100.

[0037] Further, the exhaust brake butterfly valve device 10 further comprises a transmission assembly 500, the transmission assembly 500 comprising a first transmission rod 510 and a second transmission rod 520, the first end of the first transmission rod 510 being connected with the valve plate 220, the second end of the first transmission rod 510 being hinged with the second transmission rod 520, the end of the second transmission rod 520 away from the first transmission rod 510 being connected with the driving assembly 300, the driving assembly 300 being used for driving the second transmission rod 520 to move along the axial direction of the second transmission rod 520, the second transmission rod 520 being used for driving the first transmission rod 510 to rotate around the first end, and the limiting gas being capable of exerting resistance on the second transmission rod 520.

[0038] Optionally, the base 100 is provided with an avoiding hole, a connecting shaft is arranged in the avoiding hole, and the valve plate 220 and the first transmission rod 510 are connected through the connecting shaft. Optionally, when the axial direction of the first connecting rod 320 is parallel to the axial direction of the valve body 210, the exhaust brake butterfly valve is in a fully open state, and when the axial direction of the first connecting rod 320 is perpendicular to the axial direction of the valve body 210, the exhaust brake butterfly valve is in a fully closed state. Illustratively, when the second connecting rod 320 drives the first connecting rod 320 to rotate counterclockwise with the first end as the center, the valve plate 220 rotates counterclockwise, and the opening degree of the exhaust brake butterfly valve decreases; when the second connecting rod 320 drives the first connecting rod 320 to rotate clockwise with the first end as the center, the valve plate 220 rotates clockwise, and the opening degree of the exhaust brake butterfly valve increases. Understandably, the limiting gas exerts a resistance on the second connecting rod 320, and the air pressure of the limiting gas determines the position where the second connecting rod 320 stops, thereby determining the rotation angle of the first connecting rod 320 and the rotation angle of the valve plate 220, and further determining the opening degree of the exhaust brake butterfly valve. Therefore, the limiting gas can play a role in dynamic limiting, avoiding the exhaust brake butterfly valve being fully closed under high rotational speed and high exhaust flow, thereby avoiding the reliability problems such as the wear of the thrust bearing of the supercharger 600 and the over-temperature of the oil head of the fuel injector caused by the excessive exhaust pressure.

[0039] Further, the driving assembly 300 comprises a cylinder body 310, a piston and a connecting rod 320, the cylinder body 310 is connected to the base 100, the piston is slidingly arranged in the interior of the cylinder body 310, the piston is connected to the transmission assembly 500 through the connecting rod 320, and an intake cavity is formed between the piston and the cylinder body 310. When the intake cavity is filled with air, the piston pushes the connecting rod 320 to extend out of the cylinder body 310, the valve plate 220 tends to close the valve body 210, and when the piston drives the connecting rod 320 to retract into the cylinder body 310, the valve plate 220 tends to open the valve body 210.

[0040] Optionally, the cylinder body 310 is provided with an air inlet interface 330 in communication with the intake cavity. The air inlet interface 330 is used to connect an air inlet pipeline. Compressed air is introduced into the intake cavity through the air inlet pipeline, the compressed air drives the piston to move, so that the connecting rod 320 extends out of the cylinder body 310, the connecting rod 320 drives the second transmission rod 520 to move away from the cylinder body 310, and further drives the second connecting rod 320 to rotate counterclockwise, so that the opening degree of the exhaust brake butterfly valve decreases; on the contrary, when the air pressure in the interior of the intake cavity decreases, the piston drives the connecting rod 320 to retract into the cylinder body 310, the connecting rod 320 drives the second transmission rod 520 to move close to the cylinder body 310, and further drives the second connecting rod 320 to rotate clockwise, so that the opening degree of the exhaust brake valve increases.

[0041] Further, the valve plate 220 is rotatably installed on the valve body 210 about a first axis, and the cylinder body 310 is rotatably installed on the base 100 about a second axis, and the first axis and the second axis are arranged in parallel.

[0042] Optionally, the first axis and the second axis are located at two ends of the base 100, and installation spaces are provided for the assembly of the driving assembly 300 and the transmission assembly 500 by spacing the first axis and the second axis. By rotatingly connecting the cylinder body 310 to the base 100, the jamming between components can be effectively avoided.

[0043] Further, one end of the second transmission rod 520 away from the first transmission rod 510 is threadedly connected with the connecting rod 320.

[0044] Optionally, the one end of the second transmission rod 520 away from the first transmission rod 510 is provided with a sleeve, an inner wall of the sleeve is provided with an internal thread, and an end of the connecting rod 320 extending out of the cylinder body 310 is provided with an external thread, and the connecting rod 320 and the sleeve are threadedly connected.

[0045] The second transmission rod 520 and the connecting rod 320 are connected in a threaded connection manner, which is reliable in connection and convenient in assembly. In other embodiments, the second transmission rod 520 and the connecting rod 320 can be connected by welding or other manners.

[0046] Further, the cylinder body 310 is provided with a spring, the spring is sleeved on the connecting rod 320, one end of the spring abuts against the piston, and the other end of the spring abuts against the inner wall of the cylinder body 310.

[0047] Understandably, the restoring force of the spring can push the piston to move. Specifically, when the intake cavity is connected with compressed air, the piston pushes the spring to compress, and when the air pressure inside the intake cavity decreases, the restoring force of the spring makes the piston move towards the intake cavity, thereby driving the connecting rod 320 to retract into the cylinder body 310.

[0048] Further, the gas delivery pipe 410 is provided with an adjusting valve, and the adjusting valve is used for adjusting the flow of the limiting gas.

[0049] By adjusting the flow of the limiting gas, the resistance applied to the first transmission rod 510 can be changed, so as to control the stopping position of the second transmission rod 520, thereby controlling the rotation angle of the valve body 210, and the purpose of adjusting the opening degree of the exhaust brake butterfly valve is achieved.

[0050] Further, the valve body 210 is connected to the base 100 through a clamp, and the clamp is connected to the base 100 through a bolt.

[0051] Optionally, the clamp comprises a semicircular structure and connecting portions connected to two ends of the semicircular structure, the connecting portions are provided with connecting holes for penetrating the bolt, and the valve body 210 penetrates between the through hole formed between the semicircular structure and the base 100.

[0052] Further, Figure 3 A schematic diagram of the exhaust brake butterfly valve and the supercharger after assembly according to the embodiment of the utility model is shown. Referring toFigure 3 The technical scheme also provides an engine assembly, which comprises a supercharger 600, an engine and the exhaust brake butterfly valve device 10, the engine is communicated with the supercharger 600 through an intake manifold 611 and a supercharging outlet of the supercharger 600, the engine is communicated with the supercharger 600 through an exhaust manifold 621 and a supercharging inlet of the supercharger 600, the valve body 210 is arranged on the intake manifold 611, the valve plate 220 is used for controlling the intake amount, the intake end of the gas conveying pipe 410 is communicated with a waste gas discharge outlet 622 of the supercharger 600, and the limiting gas is the waste gas of the supercharger 600.

[0053] In this arrangement, the air before entering the engine is compressed by the supercharger 600 to increase the density of the air, so that more air is filled into the cylinder of the engine, thereby increasing the power of the engine. The exhaust brake butterfly valve is used for controlling the intake amount of the engine, the intake end of the gas conveying pipe 410 is communicated with the waste gas discharge outlet 622 of the supercharger 600, and the dynamic limiting of the exhaust brake butterfly valve is realized by introducing the waste gas from the supercharger 600. It can be understood that the position at which the valve plate 220 stops rotating is related to the resistance exerted on the driving assembly 300 by the limiting gas, and by adjusting the gas pressure of the limiting gas, that is, adjusting the amount of introduction of the waste gas of the supercharger 600, the rotation angle of the valve plate 220 can be adjusted. Therefore, the problem of excessive exhaust gas pressure caused by the full closing of the exhaust brake butterfly valve under high speed and high exhaust gas flow can be avoided, and in turn, the reliability problems such as the wear of the thrust bearing of the supercharger 600 and the over-temperature of the oil head of the fuel injector can be reduced.

[0054] Further, the supercharger 600 comprises a compressor 610 and a turbine 620, the supercharging outlet is arranged on the outlet of the compressor 610, the supercharging inlet is arranged on the turbine 620, the waste gas discharge outlet 622 is arranged on the turbine 620, the fresh air inlet 612 is arranged on the compressor 610, the exhaust gas of the engine can drive the turbine of the turbine 620 to rotate, and the impeller of the compressor 610 and the turbine of the turbine 620 are coaxially connected.

[0055] The supercharger 600 in the engine assembly drives the turbine of the turbine 620 to rotate by using the exhaust gas of the engine, and in turn drives the impeller of the coaxially connected compressor 610 to rotate, so that the fresh air enters the compressor 610 through the fresh air inlet 612 and can be efficiently compressed, and then is sent into the engine through the outlet of the compressor 610. At the same time, the waste gas is discharged through the waste gas discharge outlet 622 on the turbine 620. According to specific use needs, part of the waste gas is introduced into the gas conveying pipe 410 and is used for limiting the valve plate 220. This design not only improves the intake efficiency of the engine and enhances the power output of the engine, but also effectively utilizes the waste gas energy that may be wasted originally, and improves the overall energy efficiency of the engine.

[0056] The above merely is preferable specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of the change or replacement in the utility model disclosed technology range, should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope of claims.

Claims

1. An exhaust brake butterfly valve apparatus characterized by, The exhaust brake butterfly valve device (10) comprises a base (100), a butterfly valve assembly (200), a driving assembly (300) and a limiting assembly (400) arranged on the base (100), the butterfly valve assembly (200) comprises a valve body (210) and a valve disc (220), the valve body (210) is connected with the base (100), the valve disc (220) is rotatably arranged in the valve body (210), the valve disc (220) is drivingly connected with the driving assembly (300), the driving assembly (300) is used for driving the valve disc (220) to rotate, the limiting assembly (400) comprises a gas conveying pipe (410), the gas conveying pipe (410) is connected with the base (100), and the gas conveying pipe (410) is used for conveying limiting gas which exerts resistance on the driving assembly (300).

2. The exhaust brake flap valve apparatus of claim 1, wherein, The exhaust brake butterfly valve device (10) further comprises a transmission assembly (500), the transmission assembly (500) comprises a first transmission rod (510) and a second transmission rod (520), a first end of the first transmission rod (510) is connected with the valve disc (220), a second end of the first transmission rod (510) is hingedly connected with the second transmission rod (520), and one end of the second transmission rod (520) away from the first transmission rod (510) is connected with the driving assembly (300), the driving assembly (300) is used for driving the second transmission rod (520) to move along the axis of the second transmission rod (520), and the second transmission rod (520) is used for driving the first transmission rod (510) to rotate about the first end.

3. The exhaust brake butterfly valve apparatus of claim 2 wherein, The driving assembly (300) comprises a cylinder (310), a piston and a connecting rod (320), the cylinder (310) is connected with the base (100), the piston is slidably arranged in the cylinder (310), the piston is connected with the transmission assembly (500) through the connecting rod (320), an air inlet cavity is formed between the piston and the cylinder (310), when air is inhaled into the air inlet cavity, the piston pushes the connecting rod (320) to extend out of the cylinder (310), the valve disc (220) tends to close the valve body (210), and when the piston drives the connecting rod (320) to retract into the cylinder (310), the valve disc (220) tends to open the valve body (210).

4. The exhaust brake butterfly valve apparatus of claim 3 wherein, The valve disc (220) is rotatably arranged on the valve body (210) about a first axis, and the cylinder (310) is rotatably arranged on the base (100) about a second axis, the first axis is arranged in parallel with the second axis.

5. The exhaust brake butterfly valve apparatus of claim 3 wherein, One end of the second transmission rod (520) away from the first transmission rod (510) is threadedly connected with the connecting rod (320).

6. The exhaust brake flap valve apparatus of claim 3 wherein, A spring is arranged in the cylinder (310), the spring is sleeved on the connecting rod (320), one end of the spring abuts against the piston, and the other end of the spring abuts against the inner wall of the cylinder (310).

7. The exhaust brake flap valve apparatus of any one of claims 1-6, wherein, An adjusting valve is arranged on the gas conveying pipe (410), and the adjusting valve is used for adjusting the flow of the limiting gas.

8. The exhaust brake flap valve apparatus of any one of claims 1-6, wherein, The valve body (210) is connected to the base (100) by a clamp, which is connected to the base (100) by a bolt.

9. An engine assembly characterized by, The exhaust brake butterfly valve device (10) according to any one of claims 1-8, a supercharger (600), an engine, the engine is communicated with the supercharger (600) through an intake manifold (611) and a supercharged outlet of the supercharger (600), the engine is communicated with the supercharger (600) through an exhaust manifold (621) and a supercharged inlet of the supercharger (600), the valve body (210) is arranged on the intake manifold (611), the valve plate (220) is used for controlling the intake amount, an intake end of the gas conveying pipe (410) is communicated with a waste gas discharge outlet (622) of the supercharger (600), and the limiting gas is waste gas of the supercharger (600).

10. The engine assembly of claim 9, wherein, The supercharger (600) comprises a compressor (610) and a turbine (620), the supercharged outlet is arranged on an outlet of the compressor (610), the supercharged inlet is arranged on the turbine (620), the waste gas discharge outlet (622) is arranged on the turbine (620), a fresh air inlet (612) is arranged on the compressor (610), exhaust gas of the engine can drive a turbine of the turbine (620) to rotate, and an impeller of the compressor (610) and the turbine of the turbine (620) are coaxially driven.

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