Asymmetric double-channel supercharger and vehicle

Abstract

The utility model relates to the technical field of turbochargers, in particular to an asymmetric double-flow-channel supercharger and a vehicle. The asymmetric double-flow-channel supercharger comprises a volute, a turbine, a first flow channel and a second flow channel; a containing cavity is formed in the volute, the turbine is rotationally arranged in the containing cavity, the first flow channel and the second flow channel communicate with the volute, and the sectional area of the first flow channel is larger than that of the second flow channel; a flow guide channel is formed in the volute, one end of the flow guide channel communicates with the second flow channel, and the other end of the flow guide channel communicates with the containing cavity. When the engine operates under the working conditions of medium and high rotating speed and partial opening degree of the EGR valve, part of exhaust gas in the second flow channel can directly enter the containing cavity through the flow guide channel, so that the turbine is driven to do work, the exhaust pressure of the second flow channel can be effectively reduced, blockage of the second flow channel is reduced, and the service life of the engine is prolonged. The pumping loss of the engine is reduced, and the fuel consumption rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of turbochargers, and in particular to an asymmetric dual-flow channel turbocharger and a vehicle. Background Art

[0002] In the face of increasingly stringent emission regulations and fuel consumption requirements, energy conservation and emission reduction have become inevitable requirements of the development of the times. With the continuous advancement of diesel engine technology, turbocharger technology and exhaust gas recirculation (EGR) technology have been widely used. Asymmetric dual-flow turbocharging technology can not only obtain sufficient EGR driving capacity and reduce nitrogen oxide (NOx) emissions, but also reduce engine pumping losses and improve engine thermal efficiency. Therefore, it can achieve better energy conservation and emission reduction effects.

[0003] The key to asymmetric dual-flow turbocharging technology is that there are two flow channels with different cross-sectional areas. The second flow channel is connected to the EGR circuit, and the first flow channel is isolated from the EGR circuit. Since the second flow channel has a smaller critical cross-sectional area and a higher exhaust pressure, it is often only suitable for working conditions with a higher EGR rate.

[0004] However, when the engine is operating at medium to high speeds, and when the EGR valve is partially open, the second flow passage has large pumping losses, which can cause worsening fuel consumption. Utility Model Content

[0005] The present application provides an asymmetric dual-flow channel supercharger and a vehicle, which are used to solve the problem that the second flow channel has large pumping loss and worsens fuel consumption when the engine is operating at medium and high speeds and the EGR valve is partially open.

[0006] The present application provides an asymmetric dual-flow channel supercharger, comprising a volute, a turbine, a first flow channel and a second flow channel;

[0007] The volute has an accommodating chamber, the turbine is rotatably arranged in the accommodating chamber, and the first flow channel and the second flow channel are respectively connected to the volute;

[0008] A flow guide channel is arranged on the volute, one end of the flow guide channel is connected with the second flow channel, and the other end of the flow guide channel is connected with the accommodating chamber.

[0009] In a possible implementation, the asymmetric dual-channel supercharger provided in the present application further includes a guide valve, which is disposed in the guide channel and is configured to control the opening and closing of the guide channel.

[0010] In a possible implementation, the asymmetric dual-channel supercharger provided in the present application further includes a controller, which is communicatively connected to the diverter valve, and the controller is configured to control the opening and closing of the diverter valve.

[0011] In a possible implementation, the asymmetric dual-flow channel supercharger provided by the present application further includes a flow acquisition component, the flow acquisition component is communicatively connected to the controller, and the flow acquisition component is configured to acquire the flow of the exhaust gas entering the second flow channel;

[0012] The controller is configured to control the diverter valve to be fully opened when the flow value acquired by the flow acquisition component is greater than or equal to a first preset value.

[0013] In a possible implementation, the asymmetric dual-channel supercharger provided by the present application, the controller is further configured to control the diverter valve to partially open when the flow rate acquired by the flow acquisition component is less than a first preset value and greater than or equal to a second preset value;

[0014] Among them, the first preset value is greater than the second preset value.

[0015] In a possible implementation, in the asymmetric dual-channel supercharger provided in the present application, the controller is further configured to control the flow guide valve to close when the flow acquired by the flow acquisition component is less than a second preset value.

[0016] In a possible implementation, in the asymmetric dual-channel supercharger provided by the present application, the guide valve is a solenoid valve.

[0017] In a possible implementation, the controller of the asymmetric dual-flow channel supercharger provided by the present application is a central controller.

[0018] In a possible implementation, in the asymmetric dual-flow channel supercharger provided by the present application, the flow acquisition component is an air flow sensor.

[0019] The present application also provides a vehicle, comprising a vehicle body and an asymmetric dual-flow channel supercharger according to any one of the above technical solutions installed on the vehicle body.

[0020] The present application provides an asymmetric dual-channel supercharger and a vehicle, wherein the asymmetric dual-channel supercharger is provided with a volute, a turbine, a first channel and a second channel, wherein the volute has a containing chamber, the turbine is rotatably arranged in the containing chamber, the first channel and the second channel are respectively connected to the volute; a guide channel is provided on the volute, one end of the guide channel is connected to the second channel, and the other end is connected to the containing chamber, when the engine is running at a medium or high speed and the EGR valve is partially opened, a part of the exhaust gas in the second channel can directly enter the containing chamber through the guide channel, thereby driving the turbine to do work, which can not only effectively reduce the exhaust pressure of the second channel, reduce the blockage of the second channel, reduce the loss of engine pumping air, improve fuel consumption rate, and improve engine thermal efficiency, but also make full use of the exhaust pulse energy, increase the flow rate of the turbine, balance the exhaust pressure between the first channel and the second channel, reduce the pressure difference between the first channel and the second channel, and effectively improve the operating efficiency of the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A schematic diagram of the structure of an asymmetric dual-channel supercharger provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 100-volute;

[0025] 110-accommodating chamber;

[0026] 200-Turbine;

[0027] 300-first flow channel;

[0028] 400-second flow channel;

[0029] 500- diversion channel;

[0030] 600-Diverter valve.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the implementation of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner.

[0034] As mentioned in the background technology: In the face of increasingly stringent emission regulations and fuel consumption requirements, energy conservation and emission reduction have become inevitable requirements of the development of the times. With the continuous advancement of diesel engine technology, turbocharger technology and exhaust gas recirculation (EGR) technology have been widely used. Asymmetric dual-flow turbocharging technology can not only obtain sufficient EGR driving capacity and reduce nitrogen oxide (NOx) emissions, but also reduce engine pumping losses and improve engine thermal efficiency. Therefore, it can achieve better energy conservation and emission reduction effects.

[0035] The key to asymmetric dual-flow turbocharging technology is that there are two flow channels with different cross-sectional areas. The second flow channel is connected to the EGR circuit, and the first flow channel is isolated from the EGR circuit. Since the second flow channel has a smaller critical cross-sectional area and a higher exhaust pressure, it is often only suitable for working conditions with a higher EGR rate.

[0036] However, when the engine is operating at medium to high speeds, and when the EGR valve is partially open, the second flow passage has large pumping losses, which can cause worsening fuel consumption.

[0037] In order to solve the technical problems raised above, the present application provides an asymmetric dual-channel supercharger and a vehicle, wherein the asymmetric dual-channel supercharger is provided with a volute, a turbine, a first channel and a second channel, the volute has a accommodating chamber, the turbine is rotatably arranged in the accommodating chamber, the first channel and the second channel are respectively connected to the volute; a guide channel is provided on the volute, one end of the guide channel is connected to the second channel, and the other end is connected to the accommodating chamber, when the engine is running at medium and high speeds and the EGR valve is partially opened, a part of the exhaust gas in the second channel can directly enter the accommodating chamber through the guide channel, thereby driving the turbine to do work, which can not only effectively reduce the exhaust pressure of the second channel, reduce the blockage of the second channel, reduce the loss of engine pumping air, improve fuel consumption rate, and improve the thermal efficiency of the engine, but also make full use of the exhaust pulse energy, increase the flow rate of the turbine, balance the exhaust pressure between the first channel and the second channel, reduce the pressure difference between the first channel and the second channel, and effectively improve the operating efficiency of the turbine.

[0038] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0039] refer to Figure 1 , the embodiment of the present application discloses an asymmetric dual-flow channel supercharger, including a volute 100, a turbine 200, a first flow channel 300 and a second flow channel 400;

[0040] The volute 100 has a receiving chamber 110, the turbine 200 is rotatably disposed in the receiving chamber 110, and the first flow channel 300 and the second flow channel 400 are respectively connected to the volute 100;

[0041] The volute 100 is provided with a flow guiding channel 500 , one end of the flow guiding channel 500 is connected to the second flow channel 400 , and the other end of the flow guiding channel 500 is connected to the accommodating chamber 110 .

[0042] Exemplarily, the first flow passage 300 and the second flow passage 400 are respectively connected to the exhaust manifold in the engine. When the engine is started, the exhaust gas through the EGR is discharged into the first flow passage 300 or the second flow passage 400, thereby driving the turbine 200 in the volute 100 to rotate.

[0043] Exemplarily, the guide channel 500 is integrally formed between the shell and the second flow channel 400, thereby reducing production costs.

[0044] By adopting the above technical solution, when the engine is running at medium to high speed and the EGR valve is partially open, a portion of the exhaust gas in the second flow channel 400 can directly enter the accommodating chamber 110 through the guide channel 500, thereby driving the turbine 200 to do work. This can not only effectively reduce the exhaust pressure of the second flow channel 400, reduce the blockage of the second flow channel 400, reduce the loss of engine pump air, improve fuel consumption, and improve the thermal efficiency of the engine, but also make full use of the exhaust pulse energy, increase the flow rate of the turbine 200, balance the exhaust pressure between the first flow channel 300 and the second flow channel 400, reduce the pressure difference between the first flow channel 300 and the second flow channel 400, and effectively improve the operating efficiency of the turbine 200.

[0045] In some embodiments, the asymmetric dual-flow channel supercharger further includes a guide valve 600 . The guide valve 600 is disposed in the guide channel 500 . The guide valve 600 is configured to control the opening and closing of the guide channel 500 .

[0046] Exemplarily, the diversion valve 600 is an opening and closing valve, and the opening and closing valve is used to control the opening and closing of the diversion channel 500 .

[0047] By adopting the above technical solution, the diverter valve 600 is provided, and the opening and closing state of the diverter channel 500 can be controlled by controlling the opening and closing state of the diverter valve 600, so that the asymmetric dual-channel supercharger is suitable for engines in different operating states.

[0048] In some embodiments, the asymmetric dual-channel supercharger further includes a controller, which is in communication with the diverter valve 600 , and is configured to control the opening and closing of the diverter valve 600 .

[0049] Exemplarily, the controller is a central control system of the vehicle.

[0050] By adopting the above technical solution and setting a controller, the opening and closing state of the diversion valve 600 can be controlled by the controller, thereby facilitating the control of the opening and closing of the diversion channel 500.

[0051] In some embodiments, the asymmetric dual-flow channel supercharger further includes a flow acquisition component, which is communicatively connected to the controller and configured to acquire the flow of the exhaust gas entering the second flow channel 400 .

[0052] The controller is configured to control the diverter valve 600 to be fully opened when the flow value acquired by the flow acquisition component is greater than or equal to a first preset value.

[0053] Exemplarily, the flow acquisition component is disposed in the exhaust manifold, and the flow acquisition component is used to acquire the flow of the exhaust gas in the exhaust manifold, that is, to acquire the flow of the exhaust gas entering the small channel.

[0054] Exemplarily, the first preset value is 60% of the exhaust gas flow in the first channel 300. When the vehicle engine runs at medium to high speed, medium to high load and the EGR valve is partially open, the flow value acquired by the flow acquisition component is greater than or equal to the first preset value.

[0055] By adopting the above technical solution, by setting a flow acquisition component, the flow of exhaust gas entering the second flow channel 400 is acquired in real time, and the operating status of the engine and EGR at this time can be determined. When the flow value acquired by the flow acquisition component is greater than or equal to the first preset value, it can be determined that the vehicle's engine is running at medium-high speed, medium-high load and partial opening of the EGR valve. At this time, the exhaust pressure in the second flow channel 400 is relatively large, and the controller can be used to control the guide valve 600 to be fully opened, so that part of the exhaust gas in the second flow channel 400 can enter the accommodating chamber 110 through the guide channel 500 and drive the turbine 200 to do work. This can not only effectively reduce the exhaust pressure of the second flow channel 400, reduce the blockage of the second flow channel 400, reduce the loss of engine pumping air, and improve the thermal efficiency of the engine, but also make full use of the exhaust pulse energy, increase the flow of the turbine 200, balance the exhaust pressure between the first flow channel 300 and the second flow channel 400, reduce the pressure difference between the first flow channel 300 and the second flow channel 400, and effectively improve the operating efficiency of the turbine 200.

[0056] In some embodiments, the controller is further configured to control the diverter valve 600 to partially open when the flow rate acquired by the flow acquisition component is less than the first preset value and greater than or equal to the second preset value;

[0057] Among them, the first preset value is greater than the second preset value.

[0058] Exemplarily, the second preset value is 30% of the flow in the first channel 300 .

[0059] By adopting the above technical solution, when the flow obtained by the flow acquisition component is less than the first preset value and greater than or equal to the second preset value, the controller controls the diverter valve 600 to be partially opened, so that part of the exhaust gas in the second flow channel 400 can enter the accommodating chamber 110 through the diverter channel 500, and drive the turbine 200 to do work, which can not only reduce the blockage of the gas in the second flow channel 400, but also reduce the loss of engine pump air and improve fuel consumption.

[0060] In some embodiments, the controller is further configured to control the diverter valve 600 to close when the flow rate acquired by the flow acquisition component is less than a second preset value.

[0061] By adopting the above technical solution, when the flow obtained by the flow acquisition component is less than the second preset value, the engine is running at a low speed and the EGR driving capability is required to be high. The exhaust pressure in the second flow channel 400 is reduced. At this time, the controller controls the guide valve 600 to close, and the gas in the second flow channel 400 will not be cleared through the guide channel 500, thereby ensuring the air pressure in the second flow channel 400, thereby ensuring the EGR driving pressure difference requirement.

[0062] In some embodiments, the diverter valve 600 is a solenoid valve.

[0063] Exemplarily, the solenoid valve is a vehicle solenoid valve, so that the diverter valve 600 has higher reliability and stability.

[0064] By adopting the above technical solution, it is convenient to control the opening and closing of the diversion valve 600.

[0065] In some embodiments, the controller is a central controller.

[0066] Exemplarily, the central controller is connected to a central control system signal in the vehicle.

[0067] By adopting the above technical solution, it is convenient to operate the controller.

[0068] In some embodiments, the flow acquisition component is an air flow sensor.

[0069] Exemplarily, the air flow sensor may be a valve air flow sensor, a Karman vortex air flow sensor, or a temperature and pressure compensated air flow sensor.

[0070] By adopting the above technical solution, it is convenient to detect the flow rate of the gas entering the second flow channel 400 in real time.

[0071] An embodiment of the present application further discloses a vehicle, comprising a vehicle body and an asymmetric dual-flow channel supercharger according to any one of the above embodiments installed on the vehicle body.

[0072] The structure and principle of the asymmetric dual-channel supercharger have been clearly explained in the above embodiments and will not be elaborated here one by one.

[0073] By setting the volute 100, the turbine 200, the first flow channel 300 and the second flow channel 400, the volute 100 has a accommodating chamber 110, the turbine 200 is rotatably arranged in the accommodating chamber 110, the first flow channel 300 and the second flow channel 400 are respectively connected to the volute 100; the volute 100 is provided with a guide channel 500, one end of the guide channel 500 is connected to the second flow channel 400, and the other end is connected to the accommodating chamber 110. When the engine runs at a medium or high speed and the EGR valve is partially opened, a part of the exhaust gas in the second flow channel 400 can be It can directly enter the accommodating chamber 110 through the guide channel 500, thereby driving the turbine 200 to do work. This can not only effectively reduce the exhaust pressure of the second flow channel 400, reduce the blockage of the second flow channel 400, reduce the loss of engine pumping air, and improve the thermal efficiency of the engine, but also make full use of the exhaust pulse energy, increase the flow rate of the turbine 200, balance the exhaust pressure between the first flow channel 300 and the second flow channel 400, reduce the pressure difference between the first flow channel 300 and the second flow channel 400, and effectively improve the operating efficiency of the turbine 200.

[0074] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0075] It should be noted that the embodiments represented by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0076] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0077] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0078] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An asymmetric dual-channel supercharger, characterized in that: It includes a volute, a turbine, a first flow passage, and a second flow passage; The volute has a containing cavity, the turbine is rotatably disposed in the containing cavity, the first flow channel and the second flow channel are respectively connected to the volute, and the cross-sectional area of ​​the first flow channel is greater than the cross-sectional area of ​​the second flow channel; The volute is provided with a flow guide channel, one end of the flow guide channel is connected with the second flow channel, and the other end of the flow guide channel is connected with the accommodating chamber.

2. The asymmetric dual-flow channel supercharger according to claim 1, characterized in that: It also includes a diversion valve, which is arranged in the diversion channel and is configured to control the opening and closing of the diversion channel.

3. The asymmetric dual-flow channel supercharger according to claim 2, characterized in that: It also includes a controller, which is communicatively connected with the diverter valve and is configured to control the opening and closing of the diverter valve.

4. The asymmetric dual-flow channel supercharger according to claim 3, characterized in that: Also comprising a flow acquisition component, the flow acquisition component is communicatively connected to the controller, and the flow acquisition component is configured to acquire the flow of the exhaust gas entering the second flow channel; The controller is configured to control the diversion valve to be fully opened when the flow value acquired by the flow acquisition component is greater than or equal to a first preset value.

5. The asymmetric dual-flow channel supercharger according to claim 4, characterized in that: The controller is further configured to control the diversion valve to partially open when the flow rate acquired by the flow acquisition component is less than the first preset value and greater than or equal to a second preset value; Wherein, the first preset value is greater than the second preset value.

6. The asymmetric dual-flow channel supercharger according to claim 5, characterized in that: The controller is further configured to control the diversion valve to close when the flow rate acquired by the flow acquisition component is less than the second preset value.

7. The asymmetric dual-flow channel supercharger according to any one of claims 2 to 6, characterized in that: The diverter valve is a solenoid valve.

8. The asymmetric dual-flow channel supercharger according to any one of claims 3 to 6, characterized in that: The controller is a central controller.

9. The asymmetric dual-flow channel supercharger according to any one of claims 4 to 6, characterized in that: The flow acquisition component is an air flow sensor.

10. A vehicle, characterized in that: The invention comprises a vehicle body and the asymmetric dual-flow channel supercharger according to any one of claims 1 to 9 mounted on the vehicle body.

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