CN219587624U

CN219587624U - VVT engine oil control valve with magnetism isolating and drag reducing film

Info

Publication number: CN219587624U
Application number: CN202320400560.0U
Authority: CN
Inventors: 吴剑平
Original assignee: Yibin Tiangong Machinery Co ltd
Current assignee: Yibin Tiangong Machinery Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-08-25
Anticipated expiration: 2033-03-06

Abstract

The utility model discloses a VVT engine oil control valve with a magnetism isolating and drag reducing film, relates to the technical field of VVT engine oil control valves, and is mainly used for solving the problem that after long-term work, the abrasion of the outer wall of an armature and the inner wall of a magnetism isolating sleeve can cause the increase of a gap between the armature and the magnetism isolating sleeve. The main structure is as follows: the magnetic isolation sleeve is provided with a layer of magnetic isolation and resistance reduction film on the contact surface with the armature. According to the VVT engine oil control valve with the magnetism isolating and drag reducing film, the friction force between the magnetism isolating sleeve and the armature can be greatly reduced by the magnetism isolating and drag reducing film, so that the armature assembly can move more smoothly, the abrasion of the outer wall of the armature and the inner wall of the magnetism isolating sleeve can be reduced, and the coaxiality of the ejector rod and the valve core can be further maintained.

Description

VVT engine oil control valve with magnetism isolating and drag reducing film

Technical Field

The utility model relates to the technical field of VVT engine oil control valves, in particular to a VVT engine oil control valve with a magnetism isolating and drag reducing film.

Background

The VVT oil control valve is an important component in a continuously variable valve timing system of an automotive engine, and functions to regulate and prevent the engine lubrication system from being over pressurized. Specifically, when the VVT engine oil control valve is used, the valve and the phaser are installed on the air inlet and outlet mechanism in a complete set, so that the functions of transmitting cam lift and opening and closing the air inlet and outlet valves on time are achieved, the air charging efficiency and air distribution timing are improved, the noise and the oil consumption are reduced, and the purpose of increasing the engine power is achieved.

The prior VVT engine oil control valve generally comprises an armature component, a magnetism isolating sleeve, a coil component, a valve core and other parts, wherein the armature component comprises a push rod and an armature. When the VVT engine oil control valve works, after the coil of the coil assembly is electrified, the armature assembly can be driven by the front yoke iron, so that the ejector rod in the armature assembly props against the valve core to axially move, and the oil passage opening is opened and closed. The VVT engine oil control valve can improve the dynamic property and the fuel economy of the engine in all rotating speed ranges by optimizing the rotating angle air distribution timing of the cam shaft.

However, since the armature assembly and the magnetism isolating sleeve are in sliding friction fit, after long-term operation of the VVT oil control valve, the wear of the outer wall of the armature and the inner wall of the magnetism isolating sleeve can cause an increase in the gap between the two. The ejector rod can deviate, coaxiality with the valve core can not be maintained, and accordingly the valve core is stressed to deviate, and the valve core is blocked due to unsmooth movement. Meanwhile, once the ejector rod cannot keep coaxiality with the valve core, the armature can also deviate in the magnetism isolating sleeve to generate great resistance, so that the outer round end of the armature is scratched in the magnetism isolating sleeve, and even damaged.

Disclosure of Invention

The utility model aims to provide a VVT engine oil control valve with a magnetism isolating and drag reducing film, which can greatly reduce the friction force between a magnetism isolating sleeve and an armature, so that the armature assembly can move more smoothly, and simultaneously the abrasion of the outer wall of the armature and the inner wall of the magnetism isolating sleeve can be reduced, and the coaxiality of a push rod and a valve core is further maintained.

In order to achieve the purpose, the utility model provides a VVT engine oil control valve with a magnetism isolating and drag reducing film, which comprises a coil assembly, a front yoke and a valve sleeve which are coaxially and sequentially connected, wherein a magnetism isolating sleeve is arranged in an inner cavity of the coil assembly, an armature is slidably arranged in the magnetism isolating sleeve, a valve core is slidably arranged in the valve sleeve, a magnetism isolating and drag reducing film layer is laid on a contact surface between the magnetism isolating sleeve and the armature, and a push rod which is coaxial with the valve core and penetrates through the front yoke to be contacted with the end surface of the valve core is arranged on the end surface of one side, close to the valve core, of the armature.

As a further improvement of the utility model, a push rod channel for the push rod to pass through is arranged at the axle center of the front yoke, and a guide sleeve is arranged between the push rod channel and the push rod.

As a further improvement of the utility model, the inside of the ejector rod is provided with an oil guide channel which is axially arranged along the ejector rod, and the side wall of the ejector rod between the guide sleeve and the valve core is provided with an oil guide hole which is communicated with the oil guide channel.

As a further development of the utility model, the ejector rod is a cylindrical rod.

As a further improvement of the utility model, the coil assembly comprises an electromagnetic coil arranged around the magnetism isolating sleeve, and a mounting seat for positioning and mounting the magnetism isolating sleeve is arranged in the inner cavity of the electromagnetic coil.

As a further improvement of the utility model, the coil assembly further comprises a housing sleeved outside the electromagnetic coil.

As a further improvement of the utility model, the electromagnetic coil, the front yoke and the connection of the valve sleeve and the front yoke are all arranged in the housing.

As a further improvement of the utility model, a reset spring which is coaxial with the valve core and in contact fit with the valve core is arranged in the valve sleeve inner cavity at one end of the valve core far away from the ejector rod.

As a further improvement of the utility model, the valve core is internally provided with an oil passing channel, the side wall of the valve core is provided with a plurality of oil passing holes communicated with the oil passing channel, and the side wall of the valve sleeve is provided with an oil passing hole.

As a further improvement of the utility model, the armature and the ejector rod are fixedly inserted and matched.

Compared with the prior art, the VVT engine oil control valve with the magnetism isolating and drag reducing film has the advantages that:

in the device, through the magnetism isolating and drag reducing film arranged between the magnetism isolating sleeve and the armature, the friction force between the magnetism isolating sleeve and the armature can be effectively reduced, and the abrasion of the outer wall of the armature and the inner wall of the magnetism isolating sleeve is reduced, so that the coaxiality of the ejector rod and the valve core can be maintained. Therefore, the control valve can greatly increase the consistency of the force generated when the armature assembly is pushed to the valve core, and can fully ensure that the oil duct opening can be opened and closed on time under the operation of the valve core, namely, the control valve can not generate errors due to the offset movement of the ejector rod when driving the armature assembly to work, so that the gap clamping stagnation can not occur like the prior control valve during movement, and the inconsistent opening and closing time of the oil duct can not be caused. In addition, the coaxiality of the ejector rod and the valve core is kept, and in turn, the armature is prevented from deviating in the magnetism isolating sleeve to generate great resistance, the outer round end of the armature is prevented from being scratched and even damaged in the magnetism isolating sleeve, the states of parts can be effectively protected, and the running quality of an engine can be improved.

The utility model will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of the present utility model;

fig. 2 is a perspective view of the present utility model.

Wherein: 1-valve sleeve; 11-valve core; 12-a return spring; a 2-coil assembly; 21-an electromagnetic coil; 22-a housing; 3-front yoke; 4-a guide sleeve; 5-magnetism isolating sleeve; 6-magnetic isolation drag reduction membrane; 7-an armature; 8-ejector rods; 81-an oil guide hole; 82-oil guiding channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, "plurality" means at least 3.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiments of the present utility model will now be described with reference to the accompanying drawings.

Examples

The embodiment of the utility model is shown in fig. 1-2, and the VVT engine oil control valve with the magnetism isolating and drag reducing film comprises a coil assembly 2, a front yoke 3 and a valve sleeve 1 which are coaxially and sequentially connected. The inner cavity of the coil component 2 is provided with a magnetism isolating sleeve 5, an armature 7 is slidably arranged in the magnetism isolating sleeve 5, and a valve core 11 is slidably arranged in the valve sleeve 1. Wherein, the magnetism isolating sleeve 5 is provided with a layer of magnetism isolating and drag reducing film 6 on the contact surface with the armature 7. The armature 7 is provided with a push rod 8 which is coaxial with the valve core 11 and passes through the front yoke 3 to be contacted with the end surface of the valve core 11 on the end surface of one side close to the valve core 11. A reset spring 12 which is coaxial with the valve core 11 and is in contact fit with the valve core 11 is arranged in the inner cavity of the valve sleeve 1 at one end of the valve core 11 far away from the ejector rod 8. The valve core 11 is internally provided with an oil passing channel, the side wall of the valve core 11 is provided with a plurality of oil passing holes communicated with the oil passing channel, and the side wall of the valve sleeve 1 is provided with an oil passing hole. In the embodiment, the armature 7 is fixedly inserted and matched with the ejector rod 8.

In use, the coil assembly 2 is energized to cause the front yoke 3 to generate a magnetic force, and the armature 7 moves toward the valve housing 1 side under the magnetic attraction of the front yoke 3. During the movement of the armature 7, the ejector rod 8 mounted on the armature 7 can overcome the elastic force of the return spring 12 to continuously push the valve core 11 to axially move, so that the oil passage opening on the valve sleeve 1 is opened/closed. In this embodiment, the thickness of the magnetic separation drag reduction film 6 is 0.11mm-0.14mm.

Through setting up the magnetism separation drag reduction membrane 6 that separates between magnetism separation sleeve 5 and armature 7, can effectively reduce the frictional force that separates between magnetism separation sleeve 5 and the armature 7 to can avoid the armature subassembly to produce because of the sliding friction force in magnetism separation sleeve 5 and rock the clearance, and then make the removal of armature subassembly more smooth and easy. Meanwhile, the abrasion of the outer wall of the armature 7 and the inner wall of the magnetism isolating sleeve 5 is reduced due to the existence of the magnetism isolating and drag reducing film 6, so that the offset of the ejector rod 8 can be avoided, the coaxiality of the ejector rod 8 and the valve core 11 is kept, and the valve core 11 is stressed and cannot be offset. Therefore, the control valve can greatly increase the consistency of the force generated when the armature assembly is propped against the valve core 11, and can fully ensure that the oil duct opening can be opened and closed on time under the operation of the valve core 11, namely, the control valve can not generate errors due to the offset movement of the ejector rod 8 when driving the armature assembly to work, so that the gap clamping stagnation can not occur like the prior control valve during movement, and the inconsistent opening and closing time of the oil duct can not be caused. In addition, the coaxiality of the ejector rod 8 and the valve core 11 is maintained, and in turn, the armature 7 is prevented from being offset in the magnetism isolating sleeve 5 to generate great resistance, the outer round end of the armature 7 is prevented from being scratched in the magnetism isolating sleeve 5, even damage is generated, the states of parts can be effectively protected, and the running quality of an engine is improved.

In this embodiment, a push rod channel through which the push rod 8 passes is provided at the axial center of the front yoke 3, and a guide sleeve 4 is provided between the push rod channel and the push rod 8. Through setting up uide bushing 4, can carry out further direction to the travel path of ejector pin 8 to guarantee the axiality of ejector pin 8 and case 11, make case 11 atress also can not appear shifting. Meanwhile, the ejector rod 8 is a cylindrical rod, and when the ejector rod contacts and applies force with the valve core 11, the contact area between the end face of the ejector rod 8 and the end face of the valve core 11 can be increased.

And, the ejector pin 8 is inside to be equipped with along its axial arrangement's oil guide channel 82, is equipped with the oil guide hole 81 that communicates with oil guide channel 82 on the ejector pin 8 lateral wall that is located between uide bushing 4 and case 11. The oil guide channel 82 is matched with the oil guide hole 81, so that the armature assembly can play roles in oil ventilation and air elimination when the assembly moves.

Regarding the coil assembly 2, the coil assembly 2 includes an electromagnetic coil 21 disposed around the magnetism isolating sleeve 5, and a mounting seat for positioning and mounting the magnetism isolating sleeve 5 is disposed in an inner cavity of the electromagnetic coil 21. Through this mount pad, can accomplish the location installation of magnetism isolating sleeve 5 fast, accurate. Meanwhile, the coil assembly 2 further includes a housing 22 sleeved outside the electromagnetic coil 21. In this embodiment, the electromagnetic coil 21, the front yoke 3, and the connection portion between the valve housing 1 and the front yoke 3 are all disposed in the housing 22.

The utility model has been described in connection with the preferred embodiments, but the utility model is not limited to the embodiments disclosed above, but it is intended to cover various modifications, equivalent combinations according to the essence of the utility model.

Claims

1. The utility model provides a VVT engine oil control valve with separate magnetism drag reduction membrane, includes coil pack (2), preceding yoke (3) and valve pocket (1) that connect gradually of coaxial, install in the inner chamber of coil pack (2) and separate magnetism cover (5), separate magnetism cover (5) interior slidingtype and install armature (7), valve core (11) are installed to slidingtype in valve pocket (1), a serial communication port, separate magnetism cover (5) and laid one deck separate magnetism drag reduction membrane (6) on the contact surface with armature (7), armature (7) are close to be equipped with on the terminal surface of case (11) one side coaxial and pass preceding yoke (3) and case (11) terminal surface contact ejector pin (8).

2. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 1, characterized in that a push rod passage through which the push rod (8) passes is provided at the axial center of the front yoke (3), and a guide sleeve (4) is provided between the push rod passage and the push rod (8).

3. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 2, characterized in that an oil guiding passage (82) is provided inside the ejector pin (8) along the axial direction thereof, and an oil guiding hole (81) communicating with the oil guiding passage (82) is provided on the side wall of the ejector pin (8) between the guide sleeve (4) and the valve core (11).

4. A VVT oil control valve with a magnetism isolating drag reducing film according to any one of claims 1-3, characterized in that the ejector pin (8) is a cylindrical rod.

5. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 1, characterized in that the coil assembly (2) includes an electromagnetic coil (21) disposed around the magnetism isolating sleeve (5), and a mounting seat for positioning and mounting the magnetism isolating sleeve (5) is disposed in an inner cavity of the electromagnetic coil (21).

6. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 5, characterized in that the coil block (2) further includes a housing (22) that is sleeved outside the electromagnetic coil (21).

7. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 6, characterized in that the electromagnetic coil (21), the front yoke (3) and the connection portion of the valve housing (1) and the front yoke (3) are all provided in the housing (22).

8. The VVT oil control valve with the magnetism isolating and drag reducing film according to claim 1, characterized in that a return spring (12) which is coaxial with and in contact with the valve core (11) is arranged in the inner cavity of the valve sleeve (1) at one end of the valve core (11) far away from the ejector rod (8).

9. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 1 or 8, characterized in that an oil passing passage is provided in the valve core (11), a plurality of oil passing holes communicating with the oil passing passage are provided on the side wall of the valve core (11), and an oil passing hole is provided on the side wall of the valve housing (1).

10. The VVT oil control valve with the magnetism isolating drag reducing film according to claim 1, characterized in that the armature (7) is fixedly inserted and matched with the ejector rod (8).