Performance-adjustable fuel oil metering valve with locking nut

Abstract

The utility model relates to the technical field of fuel oil, and discloses a performance-adjustable fuel oil metering valve with a locking nut, which comprises a shell, an enameled wire and a coil framework, a front armature is arranged on the left side in the shell, and the right side of the front armature is connected with a middle armature through a stainless steel gasket. The right side of the outer wall of the middle position armature is connected with a rear armature through a first bearing, the rear armature is installed on the right side in the shell, a composite bearing is connected with the outer wall of an ejector rod, and the right side of the composite bearing penetrates through a stainless steel gasket and the middle position armature to be connected with a first spring. The first spring is arranged in the first plug, and the left side of the first plug is arranged on the inner side of the rear armature.

Description

Technical Field

[0001] This utility model relates to the field of fuel technology, specifically to a fuel metering valve with adjustable performance and a locking nut. Background Technology

[0002] A fuel metering valve is a valve installed at the fuel inlet of a high-pressure fuel pump to adjust the fuel supply and pressure. Its adjustment is controlled by the ECU (Electronic Control Unit). The ECU increases or decreases the fuel quantity by changing the inlet cross-sectional area of ​​the high-pressure fuel pump via pulse signals. When the control coil is energized, the fuel metering proportional valve is open, allowing for the supply of maximum fuel flow.

[0003] The existing riveted structure of fuel metering valves may lead to performance deviations because the adjusting plug (made of copper) on the rear chuck may deform slightly during the riveting process. The amount of deformation directly affects the loss of fuel. Once the loss occurs, the product cannot be repaired, resulting in product scrap. To address this issue, we propose a fuel metering valve with adjustable performance and a locking nut. Utility Model Content

[0004] The purpose of this invention is to provide a fuel metering valve with adjustable performance and a locking nut to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fuel metering valve with adjustable performance and a locking nut, comprising a housing, enameled wire, and a coil frame. A front armature is located on the left side inside the housing. The right side of the front armature is connected to a middle armature via a stainless steel washer. The right side of the outer wall of the middle armature is connected to a rear armature via a first bearing. The rear armature is installed on the right side inside the housing. A composite bearing is connected to the outer wall of a push rod. The right side of the composite bearing passes through the stainless steel washer and the middle armature, and is connected to a first spring. The first spring is located inside a first screw plug. The left side of the plug is located inside the rear armature. A first O-ring is provided between the left side of the outer wall of the first plug and the right side of the interior of the rear armature. A locking nut is installed on the right side of the outer wall of the first plug. A valve sleeve is installed on the left side of the front armature. A first valve core is installed on the left side of the push rod. The first valve core is installed inside the valve sleeve. A valve core spring is installed on the left side of the first valve core. The valve core spring is installed inside the valve sleeve. A second O-ring is installed on the left side of the outer wall of the valve sleeve. A filter screen is provided on the outside of the first valve core. The filter screen is installed on the right side of the outer wall of the valve sleeve. A third O-ring is installed on the left side of the outer wall of the front armature.

[0006] Preferably, a coil frame is installed on the outer side of the front armature and the outer side of the valve sleeve, a frame retaining ring is installed on the right side of the coil frame, and the connecting piece is located on the outer wall of the rear armature.

[0007] Preferably, the inner side of the coil frame is provided with enameled wire, and a connecting piece is installed between the left side of the outer shell and the outer wall of the front armature.

[0008] Preferably, a plug is installed on the top of the outer casing, and a plug is installed on the right side inside the coil frame.

[0009] Preferably, the middle positions of the valve core spring, the first valve core, the push rod, the first spring, and the first screw plug are on the same horizontal line.

[0010] Preferably, the upper part of the filter screen is the oil inlet.

[0011] Preferably, the thread axis of the first screw plug is arranged perpendicular to the central axis of the oil inlet.

[0012] Preferably, the contact surface between the rear armature and the first screw plug is a conical mating structure.

[0013] Compared with existing technologies, the beneficial effects of this utility model are:

[0014] By setting up a housing, enameled wire, and coil frame, and adding a locking nut for adjusting the positioning of the first plug, the first plug can be fixed with a certain torque. After adjustment, the product can be easily repaired during the production process, reducing scrap costs. Furthermore, by adjusting the first plug, the fuel supply can be made infinitely close to the ECU standard value. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the improved front side view structure of this utility model;

[0017] Figure 2 This is a frontal cross-sectional view of the structure before the improvement of this utility model;

[0018] Figure 3 This is a schematic diagram of the improved side view structure of this utility model;

[0019] Figure 4 This is a frontal cross-sectional view of the improved structure of this utility model.

[0020] In the diagram: 1. Plug; 2. Enameled wire; 3. Coil frame; 4. Insert; 5. Frame retaining ring; 6. First O-ring; 7. Locking nut; 8. First plug; 9. First spring; 10. Rear armature; 11. Housing; 12. Middle position armature; 13. First bearing; 14. Stainless steel washer; 15. Push rod; 16. Composite bearing; 17. Front armature; 18. First valve core; 19. Valve core spring; 20. Valve sleeve; 21. Second O-ring; 22. Filter screen; 23. Third O-ring; 24. Connecting piece. Detailed Implementation

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see Figure 1-4This utility model provides a technical solution for a fuel metering valve with adjustable performance and a locking nut: A fuel metering valve with adjustable performance and a locking nut includes a housing 11, an enameled wire 2, and a coil frame 3. A front armature 17 is located on the left side inside the housing 11. The right side of the front armature 17 is connected to a middle armature 12 via a stainless steel washer 14. The right side of the outer wall of the middle armature 12 is connected to a rear armature 10 via a first bearing 13. The rear armature 10 is installed on the right side inside the housing 11. A composite bearing 16 is connected to the outer wall of a push rod 15. The right side of the composite bearing 16 passes through the stainless steel washer 14 and the middle armature 12, and is connected to a first spring 9. The first spring 9 is located inside a first screw plug 8. The left side of the first screw plug 8 is located on the rear armature 10. Inside the first screw plug 8, a first O-ring 6 is provided between the left side of the outer wall of the first screw plug 8 and the right side of the interior of the rear armature 10. A locking nut 7 is installed on the right side of the outer wall of the first screw plug 8. A valve sleeve 20 is installed on the left side of the front armature 17. A first valve core 18 is installed on the left side of the push rod 15. The first valve core 18 is installed inside the valve sleeve 20. A valve core spring 19 is installed on the left side of the first valve core 18. The valve core spring 19 is installed inside the valve sleeve 20. A second O-ring 21 is installed on the left side of the outer wall of the valve sleeve 20. A filter screen 22 is provided on the outside of the first valve core 18. The filter screen 22 is installed on the right side of the outer wall of the valve sleeve 20. A third O-ring 23 is installed on the left side of the outer wall of the front armature 17. The first O-ring 6, the second O-ring 21 and the third O-ring 23 ensure that there is no fuel leakage.

[0025] A locking nut 7 is added to adjust the positioning of the first screw plug 8. The first screw plug 8 is fixed with a certain torque. After adjustment, it is easy to rework the product during the production process, reducing scrap costs. By adjusting the first screw plug 8, the fuel supply can be made infinitely close to the ECU standard value.

[0026] A coil frame 3 is installed on the outer side of the front armature 17 and the outer side of the valve sleeve 20. A frame retaining ring 5 is installed on the right side of the coil frame 3. The connecting piece 24 is located on the outer wall of the rear armature 10.

[0027] The inner side of the coil frame 3 is provided with enameled wire 2, and a connecting piece 24 is installed between the left side of the outer shell 11 and the outer wall of the front armature 17.

[0028] A plug 1 is installed on the top of the outer casing 11, and a plug 4 is installed on the right side inside the coil frame 3.

[0029] The middle positions of the valve core spring 19, the first valve core 18, the push rod 15, the first spring 9, and the first screw plug 8 are on the same horizontal line. The locking nut 7 is used to fix the first screw plug 8 to prevent loosening due to vibration and ensure long-term stability.

[0030] The upper part of the filter screen 22 is the oil inlet. When the solenoid valve coil is energized, the fuel supply of port ① is reduced or increased proportionally. The filter screen 22 prevents impurities from entering the mating surface of the first valve core 18 and the valve sleeve 20, thereby improving reliability.

[0031] The thread axis of the first plug 8 is arranged perpendicular to the central axis of the oil inlet. By adjusting the screwing depth of the first plug 8, the initial gap between the rear armature 10 and the first valve core 18 can be finely adjusted to ensure fuel metering accuracy.

[0032] The contact surface between the rear armature 10 and the first screw plug 8 is a conical mating structure, and the locking nut 7 and the first screw plug 8 structure replace the traditional riveting method, avoiding performance deviations caused by riveting deformation.

[0033] Working principle:

[0034] First, when the enameled wire 2 of the electromagnetic coil is not energized, the elastic force of the valve core spring 19 pushes the first valve core 18 to move to the left, causing the first valve core 18 to fit against the sealing surface of the valve sleeve 20, thus closing the fuel passage. At this time, the fuel flow is minimal, and the fuel intake of the high-pressure fuel pump is limited.

[0035] According to the engine operating conditions, the ECU sends a PWM pulse width modulation signal to plug 1, which energizes the enameled wire 2 on the coil frame 3, generating an electromagnetic force. The electromagnetic force attracts the front armature 17 and the rear armature 10 to move towards the coil, driving the push rod 15 to move to the right, compressing the valve core spring 19. The push rod 15 pushes the first valve core 18 to move to the right, forming a fuel passage between the valve core and the valve sleeve 20. Fuel enters from the fuel inlet, is filtered by the filter screen 22, and flows to the high-pressure fuel pump. The ECU controls the magnitude of the electromagnetic force by adjusting the duty cycle of the PWM signal, thereby adjusting the opening of the first valve core 18 and achieving precise control of fuel flow.

[0036] Although embodiments of the present utility have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present utility, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel metering valve with adjustable performance and a locking nut, comprising a housing (11), enameled wire (2), a coil frame (3), a composite bearing (16), and a connecting piece (24), characterized in that: The left side of the interior of the outer casing (11) is provided with a front armature (17). The right side of the front armature (17) is connected to the middle armature (12) through a stainless steel washer (14). The right side of the outer wall of the middle armature (12) is connected to the rear armature (10) through a first bearing (13). The rear armature (10) is installed on the right side of the interior of the outer casing (11). The composite bearing (16) is connected to the outer wall of the push rod (15). The right side of the composite bearing (16) passes through the stainless steel washer (14), the middle armature (12) and the first spring (9). The first spring (9) is located inside the first screw plug (8). The left side of the first screw plug (8) is located inside the rear armature (10). The left side of the outer wall of the first screw plug (8) is connected to the rear armature (10). 10) A first O-ring (6) is provided between the right sides inside. A locking nut (7) is installed on the right side of the outer wall of the first screw plug (8). A valve sleeve (20) is installed on the left side of the front armature (17). A first valve core (18) is installed on the left side of the push rod (15). The first valve core (18) is installed on the inner side of the valve sleeve (20). A valve core spring (19) is installed on the left side of the first valve core (18). The valve core spring (19) is installed on the inner side of the valve sleeve (20). A second O-ring (21) is installed on the left side of the outer wall of the valve sleeve (20). A filter screen (22) is provided on the outer side of the first valve core (18). The filter screen (22) is installed on the right side of the outer wall of the valve sleeve (20). A third O-ring (23) is installed on the left side of the outer wall of the front armature (17).

2. The fuel metering valve with adjustable performance and locking nut according to claim 1, characterized in that: A coil frame (3) is installed on the outside of the front armature (17) and the outside of the valve sleeve (20). A frame retaining ring (5) is installed on the right side of the coil frame (3). The connecting piece (24) is located on the outer wall of the rear armature (10).

3. A fuel metering valve with adjustable performance and a locking nut according to claim 2, characterized in that: The inner side of the coil frame (3) is provided with enameled wire (2), and a connecting piece (24) is installed between the left side of the outer shell (11) and the outer wall of the front armature (17).

4. A fuel metering valve with adjustable performance and a locking nut according to claim 3, characterized in that: A plug (1) is installed on the top of the outer casing (11), and a plug (4) is installed on the right side inside the coil frame (3).

5. A fuel metering valve with adjustable performance and a locking nut according to claim 4, characterized in that: The middle positions of the valve core spring (19), the first valve core (18), the top rod (15), the first spring (9), and the first screw plug (8) are on the same horizontal line.

6. A fuel metering valve with adjustable performance and a locking nut according to claim 5, characterized in that: The oil inlet is located above the filter screen (22).

7. A fuel metering valve with adjustable performance and a locking nut according to claim 6, characterized in that: The thread axis of the first screw plug (8) is arranged perpendicular to the central axis of the oil inlet.

8. A fuel metering valve with adjustable performance and a locking nut according to claim 7, characterized in that: The contact surface between the rear armature (10) and the first screw plug (8) is a conical mating structure.

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