Throttle valve, engine system and vehicle
By designing a throttle valve with adjustable ventilation holes and gradually reducing the aperture, the problem of poor airflow of traditional throttle valves is solved, achieving smaller gas flow resistance and higher EGR rates.
Patent Information
- Application Number
- CN202411951555.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-03-11
AI Technical Summary
The throttle valves traditionally used in EGR systems have the problem of compressing first and then expanding during the airflow process, which leads to the airflow not being smooth enough and the intake resistance is large, which affects the EGR rate of the engine system.
A throttle valve is designed, with ventilation holes inside the valve body, and the valve core can be rotated to adjust the ventilation area of the ventilation holes. The aperture of the ventilation holes gradually decreases along the direction of airflow inflow to ensure that the airflow is always in a compressed state.
By adjusting the ventilation area and aperture design of the ventilation holes, the smooth flow of air flow is achieved, the resistance to gas flow is reduced, and the EGR rate of the engine system is improved.
Smart Images
Figure CN119593881A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a throttle valve, an engine system and a vehicle. Background Art
[0002] For engines with an EGR (Exhaust Gas Re-circulation) system, in order to increase the EGR rate in the high efficiency range, it is necessary to add a pressure regulating valve in front of the turbine to reduce the air pressure at the EGR outlet and increase the pressure difference before and after the EGR valve, thereby increasing the EGR rate.
[0003] The traditional throttle body air duct used in the EGR system is double-conical, with the throat in the middle having the smallest diameter. During the flow of gas, there is a process of compression first and then expansion. Before flowing into the turbine intake port, the gas is compressed again. The airflow is not smooth enough and the intake resistance is large. Summary of the invention
[0004] In view of this, the present application provides a throttle valve, an engine system and a vehicle, wherein the process of airflow flowing into the valve body is relatively smooth and the air intake resistance is relatively small.
[0005] Specifically, this application includes the following technical solutions:
[0006] In a first aspect, the present application provides a throttle valve, the throttle valve comprising a valve body and a valve core, a ventilation hole is formed through the valve body, the valve core is located in the ventilation hole and is rotatably connected to the valve body to change the ventilation area of the ventilation hole;
[0007] Wherein, the aperture of the ventilation hole decreases along the direction of airflow inflow.
[0008] Optionally, relative to the connection between the valve core and the valve body, an edge of the valve core on the rear side in the inflow direction of the airflow is tangent to an inner wall of the ventilation hole.
[0009] Optionally, the valve core includes a valve plate and a rotating member, the rotating member is fixedly connected to the valve plate, penetrates the inner wall of the ventilation hole, and is connected to a driving member inside the valve body, and the driving member is used to drive the rotating member to rotate along its own axis.
[0010] Optionally, the rotating member includes a first part and a second part which are separately arranged;
[0011] One end of the first part is connected to the first side of the valve plate, and the other end is connected to the driving member;
[0012] One end of the second part is connected to the second side of the valve plate, and the other end is connected to the driving member. The first side and the second side are opposite sides of the valve plate in the gravity direction.
[0013] Optionally, the first part comprises a first slot, and the valve plate is connected to the first part via the first slot; and / or,
[0014] The second part comprises a second slot, and the valve plate is connected to the second part via the second slot.
[0015] Optionally, the valve core further includes a first connecting member connected between the first slot and the valve plate; and / or the valve core further includes a second connecting member connected between the second slot and the valve plate.
[0016] Optionally, at least one first fixing member is provided on the valve body, which can be connected to an external component to fix the valve body;
[0017] The throttle valve further comprises a base, the valve body is arranged on the base, and at least one second fixing member is arranged on the base and can be connected with an external component to fix the base.
[0018] A second aspect of the present application provides an engine system, which includes the throttle valve mentioned above.
[0019] A third aspect of the present application provides a vehicle, which includes the throttle valve mentioned above, or includes the engine system mentioned above.
[0020] Optionally, the throttle valve is configured so that when the vehicle is powered off, the ventilation area of the ventilation hole remains at a maximum.
[0021] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:
[0022] The throttle valve, engine system and vehicle provided in the embodiment of the present application have ventilation holes inside the valve body, and a valve core is arranged inside, which can rotate under the control of an external control device and adjust the ventilation area of the ventilation hole to control the gas flow and ensure the EGR rate of the engine system. At the same time, since the aperture of the ventilation hole gradually decreases along the inflow direction of the airflow, the airflow is always compressed when flowing through the valve body. Compared with the throttle valve in the related art that compresses first and then expands, the resistance to gas flow will be smaller, and the airflow will be smoother, which is conducive to the components at the rear end of the throttle valve (such as a turbocharger) to inhale. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 A cross-sectional view of a throttle valve provided in an embodiment of the present application is shown;
[0025] Figure 2 A partial enlarged view of a throttle valve provided in an embodiment of the present application is shown;
[0026] Figure 3 A schematic diagram showing the throttle valve provided in an embodiment of the present application when the opening degree is maximum;
[0027] Figure 4 A schematic diagram showing the connection relationship between the valve plate, the first part and the second part provided in an embodiment of the present application is shown;
[0028] Figure 5 A schematic structural diagram of a throttle valve provided in an embodiment of the present application is shown.
[0029] Reference numerals:
[0030] 1. valve body; 11. ventilation hole; 12. first fixing member;
[0031] 2. valve core; 21. valve plate; 22. rotating member; 221. first part; 2211. first slot; 222. second part; 2221. second slot;
[0032] 3. Base; 31. Second fixing member.
[0033] 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
[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of 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. In order to make the technical solutions and advantages of this application clearer, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of 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. Figure 1-5 The throttle valve, engine system, vehicle, etc. are described in detail.
[0035] For engines with an EGR system, in order to increase the EGR rate in the high efficiency range, it is necessary to add a pressure regulating valve in front of the turbine to reduce the air pressure at the EGR outlet and increase the pressure difference before and after the EGR valve, thereby increasing the EGR rate.
[0036] The traditional throttle body air duct used in the EGR system is double-conical, with the throat in the middle having the smallest diameter. During the flow of gas, there is a process of compression first and then expansion. Before flowing into the turbine intake port, the gas is compressed again. The airflow is not smooth enough and the intake resistance is large.
[0037] In this regard, the present application provides a throttle valve, such as Figure 1 As shown, the throttle valve may include a valve body 1 and a valve core 2, wherein a ventilation hole 11 is opened through the inside of the valve body 1, and the valve core 2 is located in the ventilation hole 11 and is rotatably connected to the valve body 1 to change the ventilation area of the ventilation hole 11; wherein the aperture of the ventilation hole 11 decreases along the direction of airflow inflow.
[0038] In the throttle valve provided in the embodiment of the present application, the valve body 1 has a ventilation hole 11 inside, and a valve core 2 is arranged inside, which can rotate under the control of an external control device, and adjust the ventilation area of the ventilation hole 11 to control the gas flow and ensure the EGR rate of the engine system. At the same time, since the aperture of the ventilation hole 11 is reduced, in the flow of fluid, the pressure is small where the flow velocity is large, and the pressure is large where the flow velocity is small, so when the aperture of the ventilation hole is reduced, the flow velocity of the airflow will become faster and the pressure will be smaller, and then the surrounding pressure will be greater than that where the airflow velocity is faster, that is, the airflow is always compressed when it flows through the valve body 1. Compared with the throttle valve in the related art that compresses first and then expands, the resistance to gas flow will be smaller, and the airflow will be smoother, which is conducive to the components at the rear end of the throttle valve (such as a turbocharger) to inhale.
[0039] In some embodiments, the shape of the ventilation hole 11 can be rectangular, elliptical, etc. If you want to achieve a gradually smaller aperture of the ventilation hole along the inflow direction of the airflow, you can adjust parameters such as the side length of the rectangle or the major and minor axes of the ellipse.
[0040] In some embodiments, Figure 1 As shown, the shape of the ventilation hole 11 can be circular. The circular ventilation hole 11 can make the fluid (such as gas) be subjected to more uniform force in all directions when passing through, and the resistance of the gas flowing in or out in all directions along the circumference is basically the same. In this way, when the fluid flows in the throttle valve, the flow rate is distributed more evenly at different angles and positions, which helps to achieve a stable and predictable throttling control effect and avoid the local flow rate being too fast or too slow and affecting the flow regulation accuracy of the entire system.
[0041] On this basis, in some embodiments of the present application, when the ventilation hole 11 is circular, the aperture of the ventilation hole 11 decreases along the direction of the airflow inflow, that is, the ventilation hole 11 is in a "trumpet-mouth" shape as a whole, and the aperture of the ventilation hole 11 can also be gradually reduced. The airflow is always compressed when flowing through the circular ventilation hole 11 with a reduced aperture, the resistance to gas flow will be smaller, and the airflow will be smoother, which is conducive to the intake of components at the rear end of the throttle valve.
[0042] In some embodiments of the present application, Figure 2 As shown, relative to the connection between the valve core 2 and the valve body 1 , the rear edge of the valve core 2 in the inflow direction of the airflow is tangent to the inner wall of the ventilation hole 11 .
[0043] In the throttle valve provided in the embodiment of the present application, the connection between the airway and the valve core 2 is designed in an arc shape, which is tangent to the valve plate 21. Since the ventilation area of the airway needs to be changed by rotating the valve core 2, so as to achieve a more accurate regulation of the gas flow, the tangent structure enables the ventilation area to change in a relatively continuous and predictable manner during the rotation of the valve core 2, from fully open to fully closed or in different intermediate opening states, and the gas flow through the throttle valve can be accurately regulated to meet the specific requirements of different working conditions for gas flow.
[0044] In addition, the tangential coordination between the airway and the valve core 2 can better realize the sealing function when the valve plate 21 is closed or adjusted to a specific position, prevent fluid leakage, and form a relatively tight and reliable sealing interface between the valve plate 21 and the airway, thereby ensuring the sealing of the throttle valve in the closed state and the normal working state at different openings.
[0045] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the valve core 2 may include a valve plate 21 and a rotating member 22. The rotating member 22 is fixedly connected to the valve plate 21, penetrates the inner wall of the ventilation hole 11, and is connected to a driving member inside the valve body 1. The driving member is used to drive the rotating member 22 to rotate along its own axis.
[0046] The rotating member 22 is penetrated through the ventilation hole 11 and connected to the valve plate 21. The driving member is connected to the rotating member 22. When the ventilation area of the throttle valve needs to be adjusted, the valve plate 21 can be driven to rotate, thereby adjusting the opening of the throttle valve. The gas flow rate flowing through the throttle valve can be accurately regulated to meet the specific requirements of different working conditions for the gas flow rate.
[0047] Optionally, the driving member may be a motor.
[0048] It should be noted that in the related art, the intermediate shaft on the valve plate 21 in the throttle body 1 is generally a through-type shaft, that is, the valve plates 21 are connected to both sides of the shaft body. This arrangement will make the projection area of the valve plate 21 on the airway larger, affecting the intake efficiency, and will also increase the area of the valve plate 21. The cross-sectional area of the airway in the valve body 1 needs to be adapted to the valve plate 21, so the cross-sectional area of the airway will also increase, and the volume of the throttle body 1 will also increase, which is not conducive to the miniaturization of the throttle body 1.
[0049] In this regard, in some embodiments of the present application, Figure 3 and Figure 4 As shown, the rotating member 22 may include a first part 221 and a second part 222 which are separately arranged; one end of the first part 221 is connected to the first side of the valve plate 21, and the other end is connected to the driving member; one end of the second part 222 is connected to the second side of the valve plate 21, and the other end is connected to the driving member, and the first side and the second side are opposite sides of the valve plate 21 in the direction of gravity.
[0050] In the throttle valve provided in the embodiment of the present application, the rotating member 22 adopts two components (a first part 221 and a second part 222) which are separately arranged, replacing the through-type shaft body in the related art. The first part 221 and the second part 222 are respectively arranged on both sides of the valve plate 21 and connected to the valve plate 21, and can drive the valve plate 21 to rotate under the action of the driving member, thereby adjusting the opening of the throttle valve. Compared with the throttle body 1 in the related art, the rotating member 22 itself does not occupy the area of the valve plate 21 on the cross section of the ventilation hole 11, that is, the size of the valve plate 21 can be set to the same size as the cross section of the ventilation hole 11. The first part 221 and the second part 222 which are separately arranged do not increase the area of the valve plate 21, and therefore do not increase the volume of the throttle valve, which is more conducive to the miniaturization of the throttle valve. In addition, the throttle valve also needs to be connected to the turbocharger, and the volume of the throttle valve is reduced, which is more conducive to the spatial arrangement of multiple components in the engine system.
[0051] Specifically, the throttle valve provided in the embodiment of the present application uses a separate shaft to connect with the valve plate, which reduces the area occupied by the valve shaft in the ventilation hole 11 and can increase the effective air intake area. According to a large number of tests conducted by the inventor, the effective air intake area of the throttle body can be increased by 10%-15% by using a separate shaft design.
[0052] In some embodiments of the present application, Figure 4 As shown, the first part 221 may include a first slot 2211 , and the valve plate 21 is connected to the first part 221 via the first slot 2211 ; and / or, the second part 222 may include a second slot 2221 , and the valve plate 21 is connected to the second part 222 via the second slot 2221 .
[0053] Since the valve plate 21 is a plate-like component, the first part 221 can be plug-connected to the valve plate 21 through the first slot 2211, and / or the second part 222 can be plug-connected to the valve plate 21 through the second slot 2221. The plug-in connection usually only requires aligning the corresponding slot with the valve plate 21, and then applying a certain insertion force to complete the connection operation. Generally, no professional skills and complex tools are required. Ordinary personnel can perform the installation after simple guidance, which can greatly save installation time and labor costs, especially in batch installation operations.
[0054] Optionally, a first clamping structure is provided at one end of the first part 221 close to the valve plate 21, and a second clamping structure is provided on the valve plate 21. The first part 221 and the valve plate 21 can be connected by clamping, and the connection method is simple, fast and easy to disassemble.
[0055] The second portion 222 and the valve plate 21 can also be connected by snapping, and the principle is the same as that described above, which will not be elaborated here.
[0056] Optionally, the rotating member 22 and the valve plate 21 may be connected by pinning, plugging, etc., and those skilled in the art may select and adjust according to actual needs.
[0057] In some embodiments of the present application, the valve core 2 may further include a first connecting member connected between the first slot 2211 and the valve plate 21; and / or, the valve core 2 may further include a second connecting member connected between the second slot 2221 and the valve plate 21.
[0058] In order to prevent the valve plate 21 from becoming loose with the first connecting member and / or the second connecting member during long-term rotation, which may result in inaccurate flow control, an additional first connecting member and / or a second connecting member is provided to fix the first part 221 and / or the second part 222 to the valve plate 21. When the rotating member 22 rotates, it can drive the valve plate 21 to rotate precisely at a desired angle, thereby achieving accurate control of the flow of gas in the airway.
[0059] Optionally, the first connecting member may be a welding structure, adhesive, rivet, etc. formed after the molten welding rod is solidified. Those skilled in the art may select and adjust the type and quantity of the first connecting member according to actual needs.
[0060] Optionally, the second connecting member may be a welding structure, adhesive, rivet, etc. formed after the molten welding rod is solidified. Those skilled in the art may select and adjust the type and quantity of the second connecting member according to actual needs.
[0061] In some embodiments of the present application, Figure 5As shown, at least one first fixing member 12 can be provided on the valve body 1, which can be connected to an external component to fix the valve body 1; the throttle valve also includes a base 3, the valve body 1 is arranged on the base 3, and at least one second fixing member 31 is provided on the base 3, which can be connected to an external component to fix the base 3.
[0062] It should be noted that the throttle body 1 in the related art is generally provided with a plurality of through holes in the circumferential direction of the air inlet, and is connected to the turbocharger by means of fixings such as bolts and screws. It itself has no connection with the engine, and the vehicle may shake or bump during driving.
[0063] In this regard, in the throttle valve provided in the embodiment of the present application, at least one first fixing member 12 is provided on the valve body 1, which can be connected to the turbocharger; and a base 3 may be additionally provided, and at least one second fixing member 31 is provided on the base 3, which can be fixedly connected to the engine, facilitate fixation, and avoid shaking of the throttle valve.
[0064] In some embodiments, Figure 5 As shown, three first through holes are arranged at intervals along the circumferential direction on the outside of the ventilation hole 11 of the valve body 1, and the connection with the turbocharger can be achieved through the three through holes and fixing parts such as bolts and screws; the valve body 1 is arranged on the base 3, and two second through holes can also be arranged on the base 3. The axial direction of the second through holes is perpendicular to the axial direction of the first through holes. The base 3 can be placed on the outer wall of the engine and can be fixedly connected with the engine through the second through holes and fixing parts such as bolts and screws.
[0065] The present application also provides an engine system, which includes the throttle valve mentioned above.
[0066] In the engine system provided by the embodiment of the present application, the valve body 1 has a ventilation hole 11 inside, and a valve core 2 is arranged inside, which can rotate under the control of an external control device, and adjust the ventilation area of the ventilation hole 11 to control the gas flow and ensure the EGR rate of the engine system. At the same time, since the aperture of the ventilation hole 11 gradually decreases along the airflow direction, and in the flow of fluid, the pressure is small where the flow velocity is large, and the pressure is large where the flow velocity is small, when the aperture of the ventilation hole gradually decreases, the flow velocity of the airflow will become faster, and the pressure will also be smaller, and then the surrounding pressure will be greater than the place where the airflow velocity is faster, that is, the airflow is always compressed when it flows through the valve body 1. Compared with the throttle valve in the related art that compresses first and then expands, the resistance to gas flow will be smaller, and the airflow will be smoother, which is conducive to the components at the rear end of the throttle valve to inhale.
[0067] The present application also provides a vehicle, which includes the throttle valve mentioned above, or includes the engine system mentioned above.
[0068] In the vehicle provided in the embodiment of the present application, the valve body 1 has a ventilation hole 11 inside, and a valve core 2 is arranged inside, which can rotate under the control of an external control device, and adjust the ventilation area of the ventilation hole 11 to control the gas flow and ensure the EGR rate of the engine system. At the same time, since the aperture of the ventilation hole 11 gradually decreases along the airflow direction, and in the flow of fluid, the pressure is small where the flow velocity is large, and the pressure is large where the flow velocity is small, when the aperture of the ventilation hole 11 gradually decreases, the flow velocity of the airflow will become faster, and the pressure will also be smaller, and then the surrounding pressure will be greater than that where the airflow velocity is faster, that is, the airflow is always compressed when it flows through the valve body 1. Compared with the throttle valve in the related art that compresses first and then expands, the resistance to gas flow will be smaller, and the airflow will be smoother, which is conducive to the components at the rear end of the throttle valve to inhale.
[0069] In some embodiments of the present application, the throttle valve is configured so that when the vehicle is powered off, the ventilation area of the ventilation hole 11 remains at the maximum.
[0070] A drive component may be provided inside the valve body 1, and the drive component may be connected to a controller provided inside the vehicle, and the controller is connected to a power supply in the vehicle. When the power supply in the vehicle is cut off, the controller receives a power-off signal and sends a control signal to the drive component, thereby controlling the valve body 1 to rotate to a set angle, and the set angle is the angle at which the valve core 2 is located when the throttle valve is opened to the maximum.
[0071] For example, when the valve core 2 is a plate-like component, the angle at which the throttle valve is opened to the maximum is the angle when the plate surface of the plate-like component is parallel to the direction of airflow flow, that is, when the vehicle is powered off, the throttle valve can be kept in a fully open state, thereby ensuring that the gas at the throttle valve can flow normally when the vehicle is powered off or in a fault state without affecting the function of the engine.
[0072] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.
[0073] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.
[0074] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. A throttle valve, characterized in that: The throttle valve comprises a valve body (1) and a valve core (2); a ventilation hole (11) is provided through the valve body (1); the valve core (2) is located in the ventilation hole (11) and is rotatably connected to the valve body (1) to change the ventilation area of the ventilation hole (11); Wherein, the aperture of the ventilation hole (11) decreases along the direction in which the air flows in.
2. The throttle valve according to claim 1, characterized in that: Relative to the connection between the valve core (2) and the valve body (1), the rear edge of the valve core (2) in the inflow direction of the airflow is tangent to the inner wall of the ventilation hole (11).
3. The throttle valve according to claim 1, characterized in that: The valve core (2) comprises a valve plate (21) and a rotating member (22); the rotating member (22) is fixedly connected to the valve plate (21), penetrates the inner wall of the ventilation hole (11), and is connected to a driving member inside the valve body (1); the driving member is used to drive the rotating member (22) to rotate along its own axis.
4. The throttle valve according to claim 3, characterized in that: The rotating member (22) comprises a first part (221) and a second part (222) which are separately arranged; One end of the first part (221) is connected to the first side of the valve plate (21), and the other end is connected to the driving member; One end of the second part (222) is connected to the second side of the valve plate (21), and the other end is connected to the driving member, and the first side and the second side are opposite sides of the valve plate (21) in the direction of gravity.
5. The throttle valve according to claim 4, characterized in that: The first part (221) comprises a first slot (2211), and the valve plate (21) is connected to the first part (221) via the first slot (2211); and / or, The second part (222) comprises a second slot (2221), and the valve plate (21) is connected to the second part (222) via the second slot (2221).
6. The throttle valve according to claim 5, characterized in that The valve core (2) further includes a first connecting member, which is connected between the first slot (2211) and the valve plate (21); and / or the valve core (2) further includes a second connecting member, which is connected between the second slot (2221) and the valve plate (21).
7. The throttle valve according to any one of claims 1 to 6, characterized in that: The valve body (1) is provided with at least one first fixing member (13) which can be connected to an external component to fix the valve body (1); The throttle valve further comprises a base (3), the valve body (1) is arranged on the base (3), and at least one second fixing member (31) is arranged on the base (3) and can be connected to an external component to fix the base (3).
8. An engine system, characterized in that: The engine system comprises the throttle valve according to any one of claims 1 to 7.
9. A vehicle, characterized in that: The vehicle comprises the throttle valve according to any one of claims 1 to 7, or comprises the engine system according to claim 8.
10. The vehicle according to claim 9, characterized in that The throttle valve is configured so that when the vehicle is powered off, the ventilation area of the ventilation hole (11) remains at a maximum.