Valve plate of electronic throttle, electronic throttle and valve plate assembly method

Abstract

The present invention discloses a valve plate for an electronic throttle, an electronic throttle, and a valve plate assembly method. The outer surface of the valve plate comprises a first inclined surface and a second inclined surface, both of which are inclined toward one side of the valve plate and are symmetrical with each other. The bottom end of the first inclined surface intersects the bottom end of the second inclined surface. During assembly, the valve plate of the present invention eliminates the need to identify the installation direction of the valve plate. Furthermore, when reassembling electronic throttles for gasoline and diesel engines using this valve plate, there is no need to adjust or replace tooling, thereby facilitating assembly.

Description

Technical Field

[0001] The invention relates to an electronic throttle valve technology for an automobile engine air intake system. Background Art

[0002] In the engine intake system, the electronic throttle controls the amount of air supplied to the intake manifold to regulate the engine speed and output power. The electronic throttle adjusts the flow area of ​​air through the airway by controlling the position of the valve plate, thereby regulating the intake volume. The adjustable range of the valve plate 1 has two extreme positions, called the bottom dead center position. The position where the theoretical flow area is zero is called the bottom dead center position. Figure 1 As shown; the top dead center position is as Figure 2 As shown, it is one of the positions in the position range with the largest theoretical flow area.

[0003] Currently, electronic throttles are available for both gasoline and diesel engines. Their modular design allows them to share many common parts, including the housing, valve plate, shaft, and valve plate bolts. The most obvious difference between the two types of electronic throttles is the default valve position and bottom dead center position. Figure 3 and Figure 4 The top dead center position, default position and bottom dead center position of the electronic throttle valve plate of gasoline engine and diesel engine are shown respectively. Figure 3 and 4 Looking at both electronic throttles from the same perspective, the valve disc of a gasoline engine's electronic throttle is positioned lower on the left and higher on the right at bottom dead center, while the valve disc of a diesel engine's electronic throttle is positioned higher on the left and lower on the right at bottom dead center. The valve disc's default position is the position it takes when the electronic throttle is powered off and inoperative. The default positions of the valve discs differ based on the different air flow requirements of gasoline and diesel engines. During normal operation of a gasoline engine, when air demand is low, the default position of the electronic throttle disc is closer to bottom dead center; during normal operation of a diesel engine, when air demand is high, the default position of the electronic throttle disc is closer to top dead center. Furthermore, if a gasoline engine's electronic throttle malfunctions, the default position still allows a certain amount of air to flow to the engine, allowing the vehicle to limp to a repair center. The default position of a diesel engine's electronic throttle provides a cushion for the valve disc's return, reducing the impact of the valve disc returning from bottom dead center to top dead center. The valve disc is in the default position. The valve disc of the electronic throttle of a gasoline engine can reach the top dead center position by rotating clockwise, and can reach the bottom dead center position by rotating counterclockwise; while the valve disc of the electronic throttle of a diesel engine can reach the top dead center position by rotating counterclockwise, and can reach the bottom dead center position by rotating clockwise.

[0004] In the design of the valve plate of the electronic throttle, in order to prevent the valve plate 1 from getting stuck at the bottom dead center and to facilitate the positioning of the valve plate 1 at the bottom dead center, the bottom dead center position of the valve plate is usually set to be not perpendicular to the direction of the airway, but to have a small angle deviation relative to the vertical direction of the airway, such as Figure 1 shown.

[0005] During the installation of the electronic throttle valve and valve bolts, due to the different default positions of the valve, the installation direction of the electronic throttle valve of gasoline and diesel engines is also different. When installing the valve, you must identify and confirm the installation direction of the valve. Only when the valve is installed in the correct direction can the valve be closed to the bottom dead center position, such as Figure 5 As shown in the figure, if the valve is installed in the wrong direction or the valve is closed in the wrong direction, it will scratch the internal air passage of the shell. Figure 6 shown.

[0006] Furthermore, in the modular design of the electronic throttle, the valve disc bottom dead center positions are different for gasoline and diesel engines. To facilitate automated assembly on the production line, the position of the electric torque gun that installs valve disc bolt 2 typically remains unchanged, and the automatic operation of the electric torque gun is facilitated when the valve disc bolt is in a vertical position (i.e., the valve disc is in a horizontal position). Therefore, to ensure that the valve disc bolt positions are consistent between the two electronic throttles, the installation form of the positioning fixture needs to be changed when switching between the two electronic throttles during production. At the same time, the position of the fixture also needs to be adjusted to ensure that after the product is installed on the fixture and the valve disc is rotated to the corresponding bottom dead center position, the valve disc is in a horizontal direction, the fixture's push rod can support the valve disc, and the position of the electric torque gun does not need to be changed. However, this makes tooling replacement during production line changes more cumbersome. Figure 7 and Figure 8 The schematic diagrams of the installation methods of the electronic throttle of gasoline engine and diesel engine when installing the valve plate bolt 2 are shown respectively. It can be seen from the figure that when installing the valve plate bolt 2 of gasoline engine and diesel engine, the placement direction of the tooling 3 is different, and the push rod 4 also has different effects of pushing against the valve plate 1. Figure 7 In the middle, the push rod 4 can prevent the valve plate 1 of the gasoline engine from rotating clockwise. Figure 8 In the embodiment of the present invention, the push rod 4 can prevent the valve plate 1 of the diesel engine from rotating counterclockwise. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a valve plate for an electronic throttle that is easy to assemble, and there is no need to identify the installation direction of the valve plate during the assembly process. The electronic throttle of a gasoline engine and the electronic throttle of a diesel engine using this valve plate do not need to adjust or replace the tooling when changing the assembly.

[0008] Another technical problem to be solved by the present invention is to provide an electronic throttle.

[0009] Another technical problem to be solved by the present invention is to provide a method for assembling a valve plate of an electronic throttle.

[0010] An embodiment of the present invention provides a valve plate of an electronic throttle, the outer surface of the valve plate being composed of a first inclined surface and a second inclined surface, both of which are inclined toward one side of the valve plate and are symmetrical to each other; the bottom end of the first inclined surface and the bottom end of the second inclined surface intersect with each other.

[0011] In the above-mentioned valve plate, the included angle between the first inclined surface and the second inclined surface is 160° to 170°.

[0012] In the above-mentioned valve plate, the intersection of the first inclined surface and the second inclined surface has a smooth transition.

[0013] According to another aspect of an embodiment of the present invention, an electronic throttle valve is provided. The electronic throttle valve includes the valve plate described above.

[0014] According to another aspect of an embodiment of the present invention, a method for assembling a valve plate of an electronic throttle valve is provided, comprising the following steps:

[0015] placing one of the electronic throttle valve of a gasoline engine and the electronic throttle valve of a diesel engine on a tooling;

[0016] Rotate the valve disc to the position where it contacts the inner wall of the air passage of the electronic throttle housing, making the valve disc horizontal;

[0017] Make the fastener pass vertically through the valve plate and the rotating shaft of the electronic throttle, and tighten the fastener with a fastening tool to connect and fix the rotating shaft to the valve plate;

[0018] Remove one of the gasoline engine electronic throttle and the diesel engine electronic throttle from the tooling, and place the other of the gasoline engine electronic throttle and the diesel engine electronic throttle on the same tooling;

[0019] Rotate the valve disc of the other of the gasoline engine electronic throttle and the diesel engine electronic throttle to a position where the valve disc contacts the inner wall of the air passage of the electronic throttle housing, so that the valve disc is horizontal;

[0020] Make the fastener pass vertically through the valve plate and the rotating shaft of the electronic throttle valve, and tighten the fastener with a fastening tool to connect and fix the rotating shaft to the valve plate.

[0021] The present invention has at least the following advantages:

[0022] 1. The valve disc of the embodiment of the present invention has a symmetrical structure and a fool-proof design. It is not necessary to identify the valve disc's orientation during installation, thus preventing the disc from being installed upside down during assembly. Furthermore, when reassembling electronic throttles for gasoline and diesel engines using this valve disc, there is no need to adjust or replace the tooling, thereby simplifying the assembly process of the electronic throttle and preventing the valve disc from scratching the airway during assembly.

[0023] 2. The angle between the first bevel and the second bevel on the outer side of the valve plate is 160°~170°. The intersection of the first bevel and the second bevel has a smooth transition, which is conducive to machining, improves the machining effect, reduces the generation of burrs, and not only avoids sharp edges and corners, but also avoids the situation where the valve plate scratches the airway. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 and Figure 2 The bottom dead center position and top dead center position of the valve plate of the electronic throttle valve are shown respectively.

[0025] Figure 3 The top dead center position, default position, and bottom dead center position of the electronic throttle valve plate of a gasoline engine are shown.

[0026] Figure 4 The top dead center position, default position, and bottom dead center position of the electronic throttle valve plate of the diesel engine are shown.

[0027] Figure 5 and Figure 6 Schematic diagrams showing the electronic throttle valve plate of a gasoline engine rotating to the bottom dead center position when it is installed correctly and incorrectly.

[0028] Figure 7 and Figure 8 Schematic diagrams showing the installation methods of valve plate bolts for electronic throttles of gasoline engines and diesel engines in the prior art are shown respectively.

[0029] Figure 9 A schematic structural diagram of a valve plate of an existing electronic throttle is shown.

[0030] Figure 10 for Figure 9 A partial enlarged view of the P1 part.

[0031] Figure 11 A schematic structural diagram of a valve plate of an electronic throttle according to an embodiment of the present invention is shown.

[0032] Figure 12 for Figure 11 A partial enlarged view of the P2 part.

[0033] Figure 13A schematic diagram of the assembly structure of a valve plate and a rotating shaft according to an embodiment of the present invention is shown.

[0034] Figure 14 A schematic diagram is shown of a valve plate installed in contact with the inner wall of an airway according to an embodiment of the present invention.

[0035] Figure 15 and Figure 16 Shown respectively Figure 14 Schematic diagram of the Q1 and Q2 parts.

[0036] Figure 17 A schematic diagram is shown when the valve plate is installed to the top dead center position according to an embodiment of the present invention.

[0037] Figure 18 A schematic diagram shows an installation method for installing valve plate bolts of an electronic throttle of a gasoline engine and a diesel engine according to an embodiment of the present invention.

[0038] Figure 19 Shown Figure 18 A local enlarged schematic diagram of the S part. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Figure 9 and Figure 10 The structure of the existing electronic throttle valve is shown in FIG. Figure 9 and Figure 10 As shown, the side surface of the valve plate 1 of the existing electronic throttle valve is composed of an inclined surface 10. In addition, the installation directions of the electronic throttle valve plates of gasoline engines and diesel engines are also different.

[0041] Figure 11 and Figure 12 The structure of the valve plate of an electronic throttle valve according to the first embodiment of the present invention is shown. The outer surface of the valve plate 1a according to the first embodiment of the present invention comprises a first bevel 11 and a second bevel 12. Both the first bevel 11 and the second bevel 12 are inclined toward one side of the valve plate and are symmetrical to each other, forming a V-shaped symmetrical structure. The bottom ends of the first bevel 11 and the second bevel 12 intersect with each other. The angle β between the first bevel 11 and the second bevel 12 directly affects the bottom dead center position of the electronic throttle valve, and thus the flow curve of flow rate versus valve plate opening. Depending on the operating conditions of the electronic throttle valve, the angle β is typically between 160° and 170°. A too small angle β affects the adjustable range of the electronic throttle flow rate, while a too large angle β can easily cause the valve plate to become stuck at the bottom dead center position. An angle β greater than 90° effectively reduces burrs on the valve plate edge during machining.

[0042] Preferably, the intersection of the first inclined surface 11 and the second inclined surface 12 is rounded to achieve a smooth transition, which can further reduce the possibility of the valve plate scratching the electronic throttle valve air passage during assembly.

[0043] Figure 13 FIG1 shows a schematic diagram of the assembly structure of the valve plate and the rotating shaft according to the first embodiment of the present invention. Figure 13 As shown, the electronic throttle valve includes a rotating shaft 5 and several valve plate bolts 2a. The rotating shaft 5 has slots 50 extending through opposite sides of the rotating shaft. The valve plate 1a extends through the slots 50. Several valve plate bolts 2a pass through the rotating shaft 5 and the valve plate 1a to securely connect the rotating shaft 5 to the valve plate 1a. "Several" means one or more.

[0044] In this embodiment, two waist-shaped holes 13 are formed at the center of the valve disc 1 a . The two waist-shaped holes 13 match the two bolt holes 53 of the rotating shaft 5 for installing the valve disc bolts 2 a to fix the valve disc 1 a .

[0045] To ensure that the valve plate 1a is correctly positioned on the shaft, the valve plate 1a needs to be rotated to the position where the valve plate contacts the inner wall 61 of the air passage of the electronic throttle housing when installing the valve plate bolt 2a. Figures 14 to 16 As shown in the figure, it can be seen that when the valve plate 1a rotates to the position where the valve plate contacts the inner wall 61 of the air passage of the electronic throttle housing, the top of the outer side surface of the valve plate 1a (i.e., the intersection of the first side surface 11 and the second inclined surface 12) abuts against the inner wall 61 of the air passage of the housing 6 of the electronic throttle, thereby reducing the gas flow area to zero. Figure 17 A schematic diagram is shown when the valve plate is installed to the top dead center position according to an embodiment of the present invention.

[0046] In the prior art, it is necessary to identify the direction of the electronic throttle valve during installation. If the valve is installed in the wrong direction or the valve is closed in the wrong direction, the internal air passage of the housing will be scratched. Only when the valve is installed in the correct direction and the valve is closed in the correct direction can the valve be closed to the bottom dead center position. However, the valve plate 1a of the embodiment of the present invention has a symmetrical structure and a fool-proof design. There is no need to identify the direction of the valve plate during installation. After the valve plate is installed on the shaft, it can be rotated to a position where the valve plate contacts the inner wall of the air passage of the housing and remains horizontal (for example, Figure 18 The position shown in the figure) completes the installation of the valve plate bolt 2a, while preventing the valve plate from scratching the air passage.

[0047] Please refer to Figure 18 and Figure 19 According to another aspect of an embodiment of the present invention, a method for assembling a valve plate of an electronic throttle is provided, comprising the following steps:

[0048] Place one of the electronic throttle valve of the gasoline engine and the electronic throttle valve of the diesel engine on the tooling 3;

[0049] Rotate the valve plate 1a to a position where it contacts the air passage inner wall 61 of the electronic throttle housing, so that the valve plate 1a is horizontal;

[0050] Make the push rod 4 of the tool 3 press against the lower surface of the valve disc 1a to prevent the valve disc 1a from rotating downward;

[0051] Make the threaded fastener vertically pass through the valve plate 1a and the rotating shaft 5 of the electronic throttle valve, and tighten the threaded fastener with a tightening tool to connect and fix the rotating shaft 5 to the valve plate 2;

[0052] Remove one of the gasoline engine electronic throttle and the diesel engine electronic throttle from the tooling, and place the other of the gasoline engine electronic throttle and the diesel engine electronic throttle on the same tooling 3; that is, switch from installing the gasoline engine electronic throttle to installing the diesel engine electronic throttle, or switch from installing the diesel engine electronic throttle to installing the gasoline engine electronic throttle;

[0053] Rotate the valve plate 1a of the other of the gasoline engine electronic throttle and the diesel engine electronic throttle to a position where the valve plate contacts the air passage inner wall 61 of the electronic throttle housing, so that the valve plate 1a is horizontal;

[0054] Make the push rod 4 of the tool 3 press against the lower surface of the valve disc 1a to prevent the valve disc from rotating downward;

[0055] The threaded fastener is passed vertically through the valve plate 1a and the rotating shaft 5 of the electronic throttle valve, and the threaded fastener is tightened with a tightening tool to connect and fix the rotating shaft 5 to the valve plate 1a.

[0056] In this embodiment, the threaded fastener is a valve plate bolt 2a, and the fastening tool is an electric torque gun.

[0057] In this embodiment, whether the valve plate of the electronic throttle of a gasoline engine or the valve plate of the electronic throttle of a diesel engine is installed, the electronic throttle is placed at Figure 18 On the illustrated tooling 3, before installing the valve plate bolts, the valve plate is rotated until it contacts and maintains a level position with the air passage inner wall 61 of the housing, with both positions being identical (i.e., the bottom dead center position for one electronic throttle valve, but not the bottom dead center position for the other). In other words, using the valve plate 1a of the embodiment of the invention eliminates the need for tooling adjustment or replacement during production transitions between gasoline and diesel engine electronic throttles, thereby simplifying the assembly process of the electronic throttle valves.

Claims

1. An electronic throttle valve, characterized in that: The electronic throttle includes a valve plate, the outer side of which is composed of a first inclined surface and a second inclined surface, wherein the first inclined surface and the second inclined surface are both inclined toward one side of the valve plate and are symmetrical to each other; the bottom end of the first inclined surface and the bottom end of the second inclined surface intersect with each other; In the fully closed state after installation, the valve plate is not perpendicular to the inner wall of the air passage of the electronic throttle housing, and the outer side surface of the valve plate contacts the inner wall of the air passage.

2. The electronic throttle valve according to claim 1, characterized in that: The electronic throttle valve includes a rotating shaft and a plurality of valve plate bolts; The rotating shaft is provided with slots running through opposite sides of the rotating shaft, and the valve plate passes through the slots; the plurality of valve plate bolts pass through the rotating shaft and the valve plate to connect and fix the rotating shaft and the valve plate.

3. The electronic throttle valve according to claim 1 or 2, characterized in that: The electronic throttle valve is an electronic throttle valve of a gasoline engine or an electronic throttle valve of a diesel engine.

4. The electronic throttle valve according to claim 1, characterized in that: The included angle between the first inclined surface and the second inclined surface is 160° to 170°.

5. The electronic throttle valve according to claim 1 or 4, characterized in that: The intersection of the first inclined surface and the second inclined surface has a smooth transition.

6. A method for assembling a valve plate of an electronic throttle according to any one of claims 1 to 5, characterized in that: The following steps are involved: a. Place one of the electronic throttle valves for gasoline engines and diesel engines on the tooling; b. Rotate the valve plate to a position where it contacts the inner wall of the air passage of the electronic throttle housing, so that the valve plate is horizontal; c. Pass the fastener vertically through the valve plate and the rotating shaft of the electronic throttle, and tighten the fastener with a fastening tool to securely connect the rotating shaft to the valve plate; d. removing one of the electronic throttle valve for the gasoline engine and the electronic throttle valve for the diesel engine from the tooling, and placing the other of the electronic throttle valve for the gasoline engine and the electronic throttle valve for the diesel engine on the same tooling; e. Rotate the valve disc of one of the gasoline engine electronic throttle and the other of the diesel engine electronic throttle to a position where the valve disc contacts the inner wall of the air passage of the electronic throttle housing, making the valve disc horizontal. f. Make the fastener pass vertically through the valve plate and the rotating shaft of the electronic throttle, and tighten the fastener with a tightening tool to connect and fix the rotating shaft to the valve plate.

7. The method for assembling the valve plate of the electronic throttle according to claim 6, characterized in that: The fastening tool is an electric torque gun, and the fastener is a bolt.

8. The method for assembling the valve plate of the electronic throttle according to claim 6 or 7, characterized in that: Step b or step e also includes: making the push rod of the tooling press against the lower surface of the valve disc to prevent the valve disc from rotating.

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