Improved bypass valve structure
By adopting an inclined outer wall and inner wall gap design in the turbocharger bypass valve, the problem of inaccurate exhaust rate control in the existing technology is solved, and high-precision gas flow and boost pressure control is achieved.
Patent Information
- Application Number
- CN202520552091.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The existing turbocharger bypass valve structure has low control accuracy of the venting rate when it is opened at a small angle, resulting in inaccurate boost pressure control.
The design incorporates a gap between the inclined outer wall and the inclined inner wall. Through a planar seal and an inclined air passage structure, the valve opening angle and the venting rate are kept linearly related, thereby controlling the gas flow rate and boosting pressure.
It achieves high-precision control of gas flow and boost pressure, avoids valve jamming and sealing failure, and improves control accuracy.
Smart Images
Figure CN223725460U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to turbocharger technical field, more particularly to an improved bypass valve structure for turbocharger. BACKGROUND
[0002] Turbocharger is an important part of the current automobile engine system, which can make more air enter the cylinder and mix with fuel more fully, significantly improve the power and torque of the engine, and help improve fuel economy and reduce emissions.
[0003] In the waste bypass turbocharger structure, the bypass valve structure is provided in the turbine housing for adjusting the boost pressure. When the exhaust pressure is high, the exhaust valve is opened to reduce the exhaust pressure, preventing the turbocharger from being damaged by excessive boost pressure and engine knock and emission deterioration. In the prior art, the turbocharger exhaust passage is composed of a flat bypass valve plate and a circular exhaust passage. When the exhaust valve part is opened at a small angle, the bypass exhaust rate rises rapidly, and the bypass hole exhaust rate is difficult to control. For example, when the bypass valve plate is opened at an angle of 5°, the exhaust rate reaches 18%, and the control accuracy is low.
[0004] Therefore, based on the above status quo, the present application further designs and improves the existing bypass valve structure. INVENTION CONTENTS
[0005] In view of the deficiencies in the prior art, the utility model provides an improved bypass valve structure for turbocharger, which maintains a linear relationship between the opening angle of the bypass valve and the exhaust rate through the structure of the flat seal and the inclined airway, and can more accurately control the gas flow to control the boost pressure.
[0006] The utility model is solved by the following technical scheme.
[0007] An improved bypass valve structure includes a valve body that can be opened on a bypass hole. The bypass hole has an inclined inner wall. The valve body has a protruding structure facing the bypass hole. The protruding structure has an inclined outer wall. The gap between the inclined outer wall and the inclined inner wall increases for exhaust as the valve body opens.
[0008] The valve body in the prior art is basically a flaky valve body. When it is slightly opened at an angle, the airflow area will increase significantly, i.e. it cannot achieve the purpose of small exhaust rate by opening a small angle, resulting in very poor valve control accuracy and low boost pressure control accuracy. In this application, the gap between the inclined outer wall and the inclined inner wall is used for ventilation. During the valve body turning process, the gap does not expand rapidly, but gradually expands as the valve body turning angle increases, i.e. achieving high control accuracy.
[0009] In a preferred embodiment, when the valve body is in the closed state, the gap between the inclined outer wall and the inclined inner wall avoids the phenomenon of jamming during the opening of the valve cover, and also avoids the phenomenon of invalidation of the flat sealing due to interference when closed.
[0010] In a preferred embodiment, when the valve body is in the closed state, the width of the gap is 0.3mm-0.8mm, preferably 0.5mm.
[0011] In a preferred embodiment, a platform surface is arranged on the outer periphery of the bypass hole, and a convex edge is arranged on the convex structure, and the surface of the convex edge is attached to the platform surface to realize the closing of the valve body.
[0012] In a preferred embodiment, an assembly convex column is arranged on the valve body, and an operating member is arranged on the assembly convex column, and the operating member is connected to a driving structure for performing the opening and closing operations of the bypass valve.
[0013] In a preferred embodiment, a spring sheet and a grommet are arranged on the assembly convex column for limiting and preventing the valve piece from shaking due to the gap and generating noise.
[0014] Compared with the prior art, the improved bypass valve structure for the turbocharger has the following beneficial effects: the flat sealing on the inclined air passage structure makes the opening angle of the bypass valve and the air bleeding rate maintain a linear relationship, and the gas flow and the supercharging pressure can be more accurately controlled. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a perspective view of the turbine shell with the bypass valve in the utility model.
[0016] Figure 2 It is a sectional view of the bypass valve structure in the utility model.
[0017] Figure 3 It is a perspective view of the turbine shell in the utility model.
[0018] Figure 4 It is a schematic view of the bypass valve in the utility model.
[0019] Figure 5 It is a perspective view of the bypass valve in the utility model Figure 1 .
[0020] Figure 6 It is a perspective view of the bypass valve in the utility model Figure 2 . DETAILED DESCRIPTION
[0021] The utility model is further described in detail below in combination with the drawings and specific embodiments.
[0022] In the following embodiments, the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout, and the following embodiments described by referring to the drawings are exemplary and are only used for explaining the utility model and cannot be understood as limiting the utility model.
[0023] In the description of the utility model, it is understood that the terms: center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms: first, second and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the shown technical features. In the description of the utility model, unless otherwise explicitly specified and limited, the terms: mounting, connection, connection and the like should be understood in a broad sense, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0024] Referring to Figures 1 to 6 , the improved bypass valve structure in the utility model relates to a bypass valve 2 arranged on a turbine housing 1, the bypass valve 2 includes a valve body 22, the valve body 22 is arranged on a bypass hole in an openable mode, the bypass hole has an inclined inner wall 14, the valve body 22 is provided with a protruding structure 222 towards the bypass hole, the protruding structure 222 has an inclined outer wall, and the gap between the inclined outer wall and the inclined inner wall 14 increases for ventilation as the valve body 22 is opened.
[0025] In the application, the valve body 22 is provided with an assembly convex column 227, the assembly convex column 227 is provided with an operating part 21, the operating part 21 is connected with a driving structure, and is used for executing the opening and closing operation of the bypass valve 2. The assembly convex column 227 is provided with a spring 24 and a grommet 23, which are used for assembling the limit and providing a small amount of elastic allowance.
[0026] As can be seen from the drawings, in the structure of the application, when the valve body 22 is in the closed state, the gap between the inclined outer wall and the inclined inner wall 14 is provided, which avoids the phenomenon of jamming in the opening and closing process. Further, when the valve body 22 is in the closed state, the width of the gap is 0.3mm-0.8mm, preferably 0.5mm.
[0027] Further, as can be seen from the drawings, in the present application, the outer periphery of the bypass hole is provided with a platform surface 13, the convex structure 222 has a convex edge 221, and the surface of the convex edge 221 is attached to the surface of the platform surface 13 to realize the closing of the valve body 22.
[0028] As can be seen from the above description, in the present application, ventilation is achieved through the gap between the inclined outer wall and the inclined inner wall 14, and during the turning up of the valve body, the gap does not rapidly expand, but gradually expands with the increase of the turning up angle of the valve body, that is, the high control precision is achieved.
[0029] As described above, in the improved bypass valve structure of the present application, the structure of the planar sealing to the inclined air passage makes the opening angle of the bypass valve and the air release rate have a substantially linear relationship, and the gas flow and the supercharging pressure can be more accurately controlled.
[0030] The protection scope of the present application includes but is not limited to the above embodiments, and the protection scope of the present application is subject to the claims, and any replacement, deformation, improvement of the present technology easily thought by the skilled in the art falls within the protection scope of the present application.
Claims
1. An improved by-pass valve structure comprising a valve body (22) which is openably provided on a by-pass hole, characterized in that, The bypass hole has an inclined inner wall (14), the valve body (22) is provided with a convex structure (222) facing the bypass hole, the convex structure (222) has an inclined outer wall, and the gap between the inclined outer wall and the inclined inner wall (14) increases with the opening of the valve body (22) for ventilation.
2. The improved bypass valve structure according to claim 1, wherein The gap exists between the inclined outer wall and the inclined inner wall (14) when the valve body (22) is in a closed state.
3. The improved bypass valve structure according to claim 2, wherein The width of the gap is 0.3mm-0.8mm when the valve body (22) is in the closed state.
4. The improved bypass valve structure according to claim 1, wherein The bypass hole is provided with a platform surface (13) on the outer periphery, the convex structure (222) has a convex edge (221), and the surface of the convex edge (221) is attached to the platform surface (13) to realize the closing of the valve body (22).
5. An improved bypass valve structure according to any one of claims 1 to 4, characterized in that The valve body (22) is provided with an assembly convex column (227), and the assembly convex column (227) is provided with an operating member (21).
6. The improved bypass valve structure according to claim 5, wherein The assembly convex column (227) is provided with a spring sheet (24) and a grommet (23).