Exhaust system, internal combustion engine equipment comprising same and internal combustion engine system

Abstract

The utility model relates to an exhaust system, internal combustion engine equipment comprising the exhaust system and an internal combustion engine system. The exhaust system comprises a front silencer, the inlet end of the front silencer is connected with a first pipeline, and the outlet end of the front silencer is connected with a second pipeline. The rear silencer is located at the downstream of the front silencer, the inlet end of the rear silencer is connected with the second pipeline, and the outlet end of the rear silencer is connected with a third pipeline; at least one of the first pipeline, the second pipeline and the third pipeline is provided with a waterproof valve. The waterproof valve is electrically connected with a control unit so as to switch the opening state and the closing state of the waterproof valve.

Description

Technical Field

[0001] The present application relates to an exhaust system, an internal combustion engine device including the same, and an internal combustion engine system. Background Art

[0002] The exhaust system processes the hot exhaust gas generated by the internal combustion engine through various upstream exhaust components to reduce emission pollutants. The various upstream exhaust components may include one or more of the following components: pipes, filters, valves, catalytic converters, mufflers, and other components. For example, the valve in the exhaust system generally includes a tuning valve provided at the outlet end of the rear muffler to optimize the NVH (Noise Vibration and Harshness) performance of the internal combustion engine system. Specifically, the tuning valve can not only meet the requirements of low noise of the exhaust system but also reduce the exhaust pressure of the engine. For example, the upstream exhaust components guide the exhaust gas into an exhaust component having a diesel oxidation catalyst (DOC) as an exhaust functional component with an inlet and an outlet. Downstream of the diesel oxidation catalyst, an exhaust component with a diesel particulate filter (DPF) as an exhaust functional component may be provided. Downstream of the diesel oxidation catalyst and the optional diesel particulate filter is a selective catalytic reduction reactor (SCR) having an inlet and an outlet. The outlet leads the exhaust gas to the downstream exhaust component. A mixer is generally positioned downstream of the outlet of the DOC or the DPF and upstream of the inlet of the SCR. Inside the mixer, the exhaust gas is fully mixed with a reducing agent such as an aqueous urea solution injected into the mixer and discharged into the SCR for a reduction reaction to generate nitrogen and water, so as to reduce the nitrogen oxide emissions of the engine.

[0003] The inventors have found that in the wading condition of the internal combustion engine system, the current exhaust system lacks a waterproof mechanism, so that water can flow into the internal combustion engine system from the outlet of the exhaust system, thereby affecting the reliability of the internal combustion engine system. Summary of the Utility Model

[0004] An object of the present application is to provide an exhaust system.

[0005] An object of the present application is to provide an internal combustion engine device.

[0006] An object of the present application is to provide an internal combustion engine system.

[0007] An exhaust system according to the first aspect of the present application includes a front muffler. The inlet end of the front muffler is connected to a first pipeline, and the outlet end of the front muffler is connected to a second pipeline; a rear muffler, located downstream of the front muffler, the inlet end of the rear muffler is connected to the second pipeline, and the outlet end of the rear muffler is connected to a third pipeline; wherein, the exhaust flow paths provided by the front muffler and the rear muffler include: the exhaust enters the front muffler through the inlet end of the front muffler via the first pipeline, flows out from the outlet end of the front muffler into the second pipeline, enters the rear muffler through the inlet end of the rear muffler, and flows out from the outlet end of the rear muffler; wherein, at least one of the first pipeline, the second pipeline, and the third pipeline is provided with a waterproof valve; the waterproof valve is electrically connected to a control unit to switch the opening and closing states of the waterproof valve.

[0008] In one or more embodiments of the exhaust system, the waterproof valve includes a ball valve and / or a butterfly valve.

[0009] In one or more embodiments of the exhaust system, the butterfly valve includes a tuning valve, and a sealing ring provided between the baffle of the tuning valve and the valve body of the tuning valve; the butterfly valve is arranged in the third pipeline.

[0010] In one or more embodiments of the exhaust system, the material of the sealing ring is a soft material or a hard self-lubricating material.

[0011] In one or more embodiments of the exhaust system, the waterproof valve is a ball valve, the ball valve is arranged in the first pipeline and / or the second pipeline, and the materials of the valve body and the valve core of the ball valve are both materials resistant to exhaust high temperature and exhaust corrosion.

[0012] In one or more embodiments of the exhaust system, the materials resistant to exhaust high temperature and exhaust corrosion include ceramics, carbides, and superalloys.

[0013] An internal combustion engine device according to the second aspect of the present application includes an internal combustion engine and the exhaust system according to any one of the above, and the exhaust system is used to process the exhaust generated by the internal combustion engine.

[0014] In one or more embodiments of the internal combustion engine device, the internal combustion engine includes a gasoline engine, a diesel engine, and an alternative fuel engine.

[0015] An internal combustion engine system according to the third aspect of the present application includes the internal combustion engine device according to the second aspect and a control unit. The control unit is electrically connected to the waterproof valve to switch the opening and closing states of the waterproof valve; when the internal combustion engine system is in a normal operating condition, the waterproof valve remains open, and when the internal combustion engine system is in a wading operating condition, the control unit controls the waterproof valve to close.

[0016] In one or more embodiments of the internal combustion engine system, the internal combustion engine system includes a vehicle and a power generation system.

[0017] The advantageous effects of the embodiments described above include, but are not limited to: By providing waterproof valves controlled by control units in the first pipeline, the second pipeline, and the third pipeline of the exhaust system, it is achieved that the waterproof valves are normally open under normal operating conditions of the internal combustion engine system to avoid an increase in exhaust back pressure and other situations, so as to prevent the setting of the waterproof valves from affecting the normal operation of the internal combustion engine system. During wading conditions, the waterproof valves can close to prevent liquid from flowing back into the internal combustion engine from the exhaust system, improving the reliability of the internal combustion engine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features, properties, and advantages of the present application will become more apparent from the following description in conjunction with the drawings and embodiments. It should be noted that the drawings are only examples and are not drawn according to the condition of equal scale, and should not be used to limit the actual scope of protection required by the present application, where:

[0019] Figure 1 is a schematic block diagram of an internal combustion engine system according to an embodiment.

[0020] Figure 2 is a structural schematic diagram of an exhaust system according to an embodiment.

[0021] Figure 3A 、 Figure 3B is a structural schematic diagram of a butterfly valve of an exhaust system according to an embodiment.

[0022] Figure 4A 、 Figure 4B is a structural schematic diagram of a ball valve of an exhaust system in an open state according to an embodiment.

[0023] Figure 5A 、 Figure 5B is a structural schematic diagram of a ball valve of an exhaust system in a closed state according to an embodiment.

[0024] Reference Signs:

[0025] 10000 - Internal Combustion Engine System

[0026] 1000 - Internal Combustion Engine Equipment

[0027] 100 - Exhaust System

[0028] 1 - Front Muffler

[0029] 11 - Inlet End of the Front Muffler

[0030] 12 - Outlet End of the Front Muffler

[0031] 2 - Rear Muffler

[0032] 21 - Inlet end of the rear muffler

[0033] 22 - Outlet of the rear muffler

[0034] 31 - First pipeline

[0035] 32 - Second pipeline

[0036] 33 - Third pipeline

[0037] 4 - Waterproof valve

[0038] 41 - Ball valve

[0039] 411 - Valve body of the ball valve

[0040] 412 - Valve core

[0041] 42 - Butterfly valve

[0042] 5 - Tuning valve

[0043] 51 - Baffle of the tuning valve

[0044] 52 - Valve body of the tuning valve

[0045] 6 - Sealing ring

[0046] 200 - Internal combustion engine

[0047] 300 - Control unit. Specific implementation manner

[0048] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means more than two unless otherwise specifically defined.

[0051] As used herein, the term "embodiment" means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] According to some embodiments of the present application, referring to Figure 1 As shown, the present application provides an internal combustion engine system 10000, including an internal combustion engine device 1000 and a control unit 300. The internal combustion engine device 1000 includes an exhaust system 100 and an internal combustion engine 200, which will be described in detail in the following embodiments. The exhaust system 100 is used to process the exhaust gas generated by the internal combustion engine 200. The exhaust system 100 includes a waterproof valve 4. The control unit 300 is electrically connected to the waterproof valve 4 to switch the opening and closing states of the waterproof valve 4; when the internal combustion engine system 10000 is in a normal operating condition, the waterproof valve 4 remains open. When the internal combustion engine system 10000 is in a wading operating condition, the control unit 300 controls the waterproof valve 4 to close. That is, the waterproof valve 4 is an electronic control valve, and the power supply of the control unit 300 and the waterproof valve 4 is generally a constant power supply. Whether the internal combustion engine device 1000 is running or not, it is powered and in an operable state. For example, when the internal combustion engine system 10000 is a vehicle, the power supply of the control unit 300 and the waterproof valve 4 is, for example, a low-voltage power supply of 12V from a lead-acid battery or a lithium battery, to prevent liquid from flowing back into the internal combustion engine device in the wading operating condition of the internal combustion engine system 10000 when the internal combustion engine device 1000 is not running.

[0055] The waterproof valve of the present application is not limited to only preventing the backflow of water, but can also prevent other forms of liquid from flowing back from the exhaust system to the internal combustion engine.

[0056] The internal combustion engine 200 is a heat engine that directly converts the thermal energy released by burning fuel inside the machine into power. Its concept is relative to the external combustion engine. The internal combustion engine 200 can include, for example, gasoline engines, diesel engines, alternative fuel engines. Alternative fuels can be, for example, methanol, ethanol, ammonia, natural gas, hydrogen, etc. The meaning of alternative fuel engines is not limited to complete substitution. For example, it can also be partial substitution, that is, for example, methanol-diesel, ammonia-diesel and other dual-fuel engines, etc., which also belong to the meaning range of alternative fuel engines, and are not limited by this.

[0057] The internal combustion engine equipment 1000 includes, but is not limited to, vehicles powered by internal combustion engines as a driving force, such as passenger cars, commercial vehicles, construction machinery, agricultural machinery, rail transit trains, etc. The vehicles can also be, for example, ships and aircraft powered by internal combustion engines. The internal combustion engine equipment also includes power generation systems powered by internal combustion engines, such as diesel generator systems and biogas generator sets in biogas power stations. In order to meet the requirements of relevant emission regulations for vehicles and power generation systems, an exhaust system is used to treat the exhaust gas generated by the internal combustion engines of vehicles and power generation systems.

[0058] The following "upstream" and "downstream" are defined according to the flow direction of the exhaust gas in the exhaust system 100.

[0059] Reference Figure 2 As shown in the figure, in some embodiments, the exhaust system 100 includes a front muffler 1, a rear muffler 2, a pipeline, and a waterproof valve 4.

[0060] The "front" and "rear" in the meaning of the front muffler 1 and the rear muffler 2 refer to the upstream and downstream relationships of their relative positions. The meaning of the muffler is similar to the meaning of "exhaust muffler" in the art, that is, the function of the exhaust muffler is to reduce the exhaust noise by gradually reducing the exhaust pressure and attenuating the pulsation of the exhaust pressure. The structure of the muffler can include, for example, a muffler housing, an inner shell, internal and external partitions, and inlet and outlet pipes, etc. Therefore, the muffler can also be called a muffler package, a sound-absorbing package, a silencing package, etc. The sizes of the front muffler 1 and the rear muffler 2 can be Figure 2 As shown in the figure, the volume of the rear muffler 2 is larger than that of the front muffler 1, but is not limited by this.

[0061] The inlet end 11 of the front muffler is connected to a first pipeline 31, the outlet end 12 of the front muffler is connected to a second pipeline 32. The rear muffler 2 is located downstream of the front muffler 1. The inlet end 21 of the rear muffler is connected to the second pipeline 32, and the outlet end 22 of the rear muffler is connected to a third pipeline 33.

[0062] The exhaust gas flow path provided by the front muffler 1 and the rear muffler 2 includes: the exhaust gas enters the front muffler 1 through the inlet end 11 of the front muffler via the first pipeline 31, flows out from the outlet end 12 of the front muffler into the second pipeline 32, enters the rear muffler 22 through the inlet end 21 of the rear muffler, and flows out from the outlet end 22 of the rear muffler.

[0063] As Figure 2 shown, at least one of the first pipeline 31, the second pipeline 32, and the third pipeline 33 is provided with a waterproof valve 4. For example, Figure 2 shown, in some embodiments, the first pipeline 31, the second pipeline 32, and the third pipeline 33 are all provided with a waterproof valve 4, but this is not a limitation. The meaning of the pipeline is similar to the common meaning in the art, and here it is a component that provides for the flow of exhaust gas outside functional components such as mufflers and catalytic converters.

[0064] By setting the waterproof valve 4, when the internal combustion engine system 10000 is in a wading condition, such as when a vehicle is wading, whether the vehicle is wading while driving or when the vehicle is parked and wading, the control unit 300 can switch the waterproof valve 4 from the normally open state to the closed state to prevent liquid from flowing back from the exhaust system to the internal combustion engine.

[0065] The control unit 300 can control the opening and closing of the waterproof valve 4. By using the existing method of the control unit 300 to control an electronic valve, this application does not involve improvements in the control method.

[0066] The waterproof valve 4 is generally an active control valve, rather than a passive valve. Since it corresponds to a wading condition, a passive valve generally opens when the flow rate is larger to provide a greater opening force, while in a wading condition, it is the opposite. In a wading condition, the liquid can provide a greater opening force, and at this time, the waterproof valve should be closed. Therefore, the waterproof valve 4 is an active valve electronically controlled by the control unit 300.

[0067] As can be seen from the above, the beneficial effects of the exhaust system introduced in the above embodiments include but are not limited to: by setting waterproof valves controlled by the control unit in the first pipeline, the second pipeline, and the third pipeline of the exhaust system, it is realized that under normal operating conditions of the internal combustion engine system, the waterproof valves are normally open to avoid an increase in exhaust back pressure and other situations to prevent the setting of the waterproof valves from affecting the normal operation of the internal combustion engine system, and in a wading condition, the waterproof valves can close to prevent liquid from flowing back from the exhaust system into the internal combustion engine, improving the reliability of the internal combustion engine system.

[0068] Referring to Figures 3A to 5B shown, the form of the waterproof valve 4 can be Figure 3A , Figure 3B the butterfly valve 42 shown, or it can also be Figure 4A , Figure 4B , Figure 5A ,Figure 5B The ball valve 41 shown can also be a butterfly valve 42, a ball valve 41 or other forms of waterproof valves, which are all arranged in the exhaust system. For example, the waterproof valve provided in the first pipeline 31 and the second pipeline 32 is a ball valve 41, and the waterproof valve provided in the third pipeline 33 is a butterfly valve 42 and other combined forms, which are not limited thereto.

[0069] Reference Figure 3A 、 Figure 3B As shown, the waterproof valve 4 can include a butterfly valve 42, and the structure of the butterfly valve 42 can be the tuning valve 5 of the existing exhaust system. The tuning valve 5 can include a baffle 51, a valve body 52, a lower end fastener 53, an elastic sealing block 54, a pin shaft 55, and an angle control disc 56. On the basis of the existing tuning valve 5, a sealing ring 6 is arranged between the baffle 51 of the tuning valve and the valve body 52 of the tuning valve. The butterfly valve 42 is arranged in the third pipeline 33. The meaning of the tuning valve 5, that is, the active tuning valve in the existing exhaust system, can adjust the exhaust sound wave by opening or closing the valve. And the waterproof valve 4, on the basis of the existing tuning valve 5, arranges a sealing ring 6 between the baffle 51 of the tuning valve and the valve body 52 of the tuning valve, thereby realizing the waterproof function. Such a beneficial effect is that the existing tuning valve can be utilized, and only the sealing ring needs to be added, with less modification to the original system, and the waterproof effect can be achieved. At the same time, when the system is in normal working conditions, it does not affect the function of the original tuning valve 5, so that the waterproof function can be realized at a lower cost.

[0070] In some embodiments, the material of the sealing ring 6 is a soft material or a hard self-lubricating material. The soft material can be, for example, high-temperature-resistant rubber or silica gel, and the hard self-lubricating material can be, for example, high-temperature-resistant graphite, polyimide, Teflon (PTFE) and other self-lubricating materials, which are not limited thereto. The soft material or the hard self-lubricating material is adopted to avoid abnormal noise. It can be understood that the soft material or the hard self-lubricating material here is an existing material, and the content of this application does not involve the improvement of the soft material or the hard self-lubricating material.

[0071] Reference Figure 4A 、 Figure 4B And Figure 5A 、 Figure 5B As shown, the waterproof valve 4 can be a ball valve, and the ball valve is arranged in the first pipeline 31 and / or the second pipeline 32. The materials of the valve body 411 and the valve core 412 of the ball valve are both materials resistant to exhaust high temperature and exhaust corrosion.

[0072] The structure of the ball valve 41 is similar to that of the prior art. The ball valve 41 includes a valve body 411, a valve core 412, a pressure ring 413, and a compensation spring 414. The valve can be automatically rotated under the control of a controller. The valve can be opened 0° to 180° according to the opening and closing angle. The valve core and valve body of the valve are made of sheet or spherical or other shapes with sealing materials. For example Figure 4A , Figure 4B As shown, under normal operating conditions, such as when the vehicle is driving on a normal road, the valve is in a normally open state; for example Figure 5A , Figure 5B As shown, in wading conditions, such as when the vehicle is driving in wading, after the control unit gives a signal, the valve rotates to play a sealing role. After sealing, external liquid cannot flow back into the power system of the entire vehicle. Materials that are resistant to exhaust high temperatures and exhaust corrosion can be, for example, ceramics, carbides, and high-temperature alloys. In this way, the existing ball valve 41 can be more reliable as a waterproof valve in the exhaust system. It can be understood that the ceramics, carbides, and high-temperature alloys here are all existing materials, and the content of this application does not involve improvements to materials such as ceramics, carbides, and high-temperature alloys.

[0073] As can be seen from the above, the beneficial effects of the exhaust system, internal combustion engine equipment, and internal combustion engine system introduced in the above embodiments include but are not limited to: by arranging a waterproof valve controlled by a control unit in the first pipeline, the second pipeline, and the third pipeline of the exhaust system, the waterproof valve is always open under normal operating conditions of the internal combustion engine system to avoid an increase in exhaust back pressure, etc., to avoid the setting of the waterproof valve affecting the normal operation of the internal combustion engine system, and in wading conditions, the waterproof valve can be closed to prevent liquid from flowing back into the internal combustion engine from the exhaust system, thereby improving the reliability of the internal combustion engine system.

[0074] Although the present application is disclosed in the above embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the scope of protection defined by the claims of the present application.

Claims

1. An exhaust system (100), characterized in that, Comprising: A front muffler (1), with a first pipeline (31) connected to the inlet end (11) of the front muffler and a second pipeline (32) connected to the outlet end (12) of the front muffler; A rear muffler (2), located downstream of the front muffler (1), with the inlet end (21) of the rear muffler connected to the second pipeline (32) and the outlet end (22) of the rear muffler connected to a third pipeline (33); Wherein, the exhaust gas flow path provided by the front muffler (1) and the rear muffler (2) includes: the exhaust gas enters the front muffler (1) through the inlet end (11) of the front muffler via the first pipeline (31), flows out from the outlet end (12) of the front muffler and enters the second pipeline (32), enters the rear muffler (2) through the inlet end (21) of the rear muffler, and flows out from the outlet end (22) of the rear muffler; Wherein, at least one of the first pipeline (31), the second pipeline (32), and the third pipeline (33) is provided with a waterproof valve (4); The waterproof valve (4) is electrically connected to a control unit (300) to switch the opening and closing states of the waterproof valve (4).

2. The exhaust system (100) according to claim 1, characterized in that, The waterproof valve (4) includes a ball valve (41) and / or a butterfly valve (42).

3. The exhaust system (100) according to claim 2, characterized in that, The butterfly valve (42) includes a tuning valve (5) and a sealing ring (6) provided between the baffle (51) of the tuning valve and the valve body (52) of the tuning valve; the butterfly valve (42) is arranged in the third pipeline (33).

4. The exhaust system (100) according to claim 3, characterized in that, The material of the sealing ring (6) is a soft material or a hard self-lubricating material.

5. The exhaust system (100) according to claim 2, characterized in that, The waterproof valve (4) is a ball valve, the ball valve is arranged in the first pipeline (31) and / or the second pipeline (32), and the materials of the valve body (411) and the valve core (412) of the ball valve are both materials resistant to high exhaust gas temperature and exhaust gas corrosion.

6. An internal combustion engine device (1000), characterized in that, Comprising an internal combustion engine (200) and an exhaust system (100) as described in any one of claims 1 - 5, the exhaust system (100) being used to process the exhaust gas generated by the internal combustion engine (200).

7. The internal combustion engine device (1000) according to claim 6, characterized in that, The internal combustion engine (200) includes a gasoline engine, a diesel engine, and an alternative fuel engine.

8. An internal combustion engine system (10000), characterized in that, Comprising an internal combustion engine device (1000) as described in claim 6 or 7 and a control unit (300), the control unit (300) is electrically connected to the waterproof valve (4) to switch the opening and closing states of the waterproof valve (4); when the internal combustion engine system (10000) is in a normal working condition, the waterproof valve (4) remains open, and when the internal combustion engine system (10000) is in a wading working condition, the control unit (300) controls the waterproof valve (4) to close.

9. The internal combustion engine system (10000) according to claim 8, characterized in that, The internal combustion engine system (10000) includes a vehicle and a power generation system.

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