CN217999681U - Front cover sealing structure of engine oil control valve and vehicle - Google Patents

Abstract

The embodiment of the application provides protecgulum seal structure and vehicle of machine oil control valve, includes: the front cover covers the engine oil control valve and the variable timing system, a central electromagnet is detachably arranged on the front cover, a first cavity is formed among the engine oil control valve, the front cover, the variable timing system and the central electromagnet, and a second cavity is formed between the front cover and the engine oil control valve; the first sealing element is arranged on one side, facing the engine oil control valve, of the front cover so as to prevent engine oil in the first cavity from overflowing to the second cavity. The embodiment of the application aims at solving the oil sealing problem of the VVT adopting the central engine oil control valve in the dry belt transmission.

Description

Front cover sealing structure of engine oil control valve and vehicle

Technical Field

The embodiment of the application relates to the technical field of automobile engines, in particular to a front cover sealing structure of an engine oil control valve and a vehicle.

Background

VVT, generally referred to as Variable Valve Timing (VVT), is a technology used in automotive piston engines. In a conventional dry belt-driven VVT, an OCV (Oil Control Valve) generally refers to an Oil Control Valve, wherein the OCV is disposed on a cylinder cover or a Valve chamber cover, high-pressure Oil flows to the Valve chamber cover through the cylinder cover, and the OCV is supplied through an Oil passage of the Valve chamber cover and an Oil passage of a camshaft, so that Control of the VVT is achieved; VVT uses structures such as blanking cover, and will drive hydraulic oil and timing belt cavity and keep apart, guarantees that the belt cavity is dry oily. The plastic front cover is fixed on engine body parts such as a cylinder cover, a valve chamber cover, a cylinder body and the like by bolts, and mainly coats a belt chamber for preventing dust and sundries from entering the belt chamber, damaging the belt and prolonging the service life of the belt. The dry belt drive system is arranged in the OCV side-mount VVT, and the OCV center-mount VVT is frequently applied to a chain drive or a wet belt drive system.

The conventional dry belt transmission system mostly adopts the OCV side-mounted VVT, along with the upgrading and tightening of emission regulations, the application of Miller cycle and Atkinson cycle technologies of an engine puts higher requirements on the speed regulation of the VVT, so the middle-mounted OCV VVT needs to be adopted, but the middle-mounted OCV has the problem of oil sealing of a belt chamber, and oil is easy to leak from the belt chamber.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a front cover sealing structure of an engine oil control valve and a vehicle, and aims to solve the problem of oil sealing of a VVT (variable valve timing) device adopting a middle engine oil control valve in dry belt transmission.

The embodiment of the application provides a protecgulum seal structure of machine oil control valve, includes: a front cover covering the engine oil control valve and the variable timing system, wherein the front cover is detachably provided with a central electromagnet, a first chamber is formed among the engine oil control valve, the front cover, the variable timing system (20) and the central electromagnet, and a second chamber is formed between the front cover and the variable timing system; the first sealing element is arranged on one side, facing the engine oil control valve, of the front cover so as to prevent engine oil in the first cavity from overflowing to the second cavity.

Optionally, the method further comprises:

the annular boss is positioned on one side, facing the engine oil control valve, of the front cover;

the variable timing system is partially installed in the inner ring of the annular boss, and an annular gap exists between the part of the variable timing system located in the annular boss and the inner annular wall of the annular boss; optionally, the first seal is annular, the outer ring of the first seal is fixedly connected with the inner annular wall of the annular boss, and the inner ring of the first seal is arranged in contact with the portion of the variable timing system located in the annular boss.

Optionally, a valve chamber cover is also included;

a second seal between the valve chamber cover (12) and the oil control valve,

a third chamber is formed between the engine oil control valve and the valve chamber cover, and the second sealing element is positioned in the third chamber to prevent the engine oil in the third chamber from overflowing to the second chamber.

Optionally, the second sealing element is annular, an outer ring of the second sealing element is fixedly connected with a cavity wall of a second cavity formed by the valve chamber cover in an enclosing manner, and an inner ring of the second sealing element is arranged in contact with the cavity wall of the second cavity formed by the engine oil control valve in an enclosing manner.

Optionally, a mounting hole for mounting the central electromagnet is formed in the front cover, and the structure further includes a third sealing member disposed on the central electromagnet to seal a gap between the central electromagnet and the mounting hole.

Optionally, the third sealing element is annular, an inner annular wall of the third sealing element is fixedly connected with the outer side of the central electromagnet, and an outer annular wall of the third sealing element is arranged in contact with the inner wall of the mounting hole.

Optionally, the front cover is made of aluminum alloy.

A second aspect of the embodiments of the present application provides a vehicle including the front cover seal structure of the oil control valve as described above.

Has the advantages that:

the application provides a front cover sealing structure of an engine oil control valve and a vehicle, wherein the front cover covers the front cover of the engine oil control valve, the front cover is detachably provided with a central electromagnet, a first cavity is formed among the engine oil control valve, the front cover and the central electromagnet, and a second cavity is formed between the front cover and the engine oil control valve; the first sealing element is arranged on one side, facing the engine oil control valve, of the front cover so as to prevent engine oil in the first cavity from overflowing to the second cavity. The scheme of the application relates to a dry belt transmission engine, the dry belt transmission engine has the advantages of stable and noiseless operation, good buffering and vibration absorption effects, simple structure, convenience in maintenance and the like, and the engine oil control valve is of a central structure, and compared with a side engine oil control valve, the central engine oil control valve can improve the response speed of the VVT of the dry belt transmission engine and the control precision of the VVT of the dry belt transmission engine; due to the fact that the first sealing element is adopted, the engine oil can be effectively blocked from the passage from the first cavity to the second cavity, a good oil sealing effect is achieved, the oil sealing problem of the engine oil in the middle-set engine oil control valve is solved, the advantages of the middle-set engine oil control valve and a dry belt transmission engine can be simultaneously embodied after the oil sealing problem is solved through the oil sealing device, and product competitiveness is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is an exploded view of a variable valve timing system, an oil control valve, a front cover, and a center solenoid according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of an oil control valve, a variable valve timing system, and a front cover according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a front cover, a fixing lug, a positioning pin and a positioning pin hole according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a front cover, a fixing lug, a positioning pin and a positioning pin hole according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an oil seal fixture and a front cover according to an embodiment of the present application;

fig. 6 is a schematic cross-sectional structure view of an oil seal tool and a front cover according to an embodiment of the present application.

Description of the reference numerals: 1. a front cover; 2. a central electromagnet; 3. an oil control valve; 4. a first chamber; 5. a second chamber; 6. a third chamber; 7. a first seal member; 8. a second seal member; 9. a third seal member; 10. an annular boss; 11. an annular gap; 12. a valve chamber cover; 13. mounting holes; 14. a variable timing system; 15. fixing the bolt; 16. fixing the ear; 17. positioning pins; 18. a positioning pin hole; 19. oil seal tooling; 20. a variable timing system.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the related art, VVT (Variable Valve Timing) is generally referred to as a Variable Valve Timing system, which is a technology used in an automotive piston engine. The traditional VVT of dry belt drive generally adopts the VVT of OCV side formula, along with the upgrading and tightening of emission regulation, the application of engine Miller's circulation, atkinson's circulation technique has proposed higher requirement to VVT speed governing. In order to realize higher speed regulation of the VVT, the VVT using the middle-set OCV is required, but the middle-set OCV has an oil seal problem of the belt chamber, that is, oil easily leaks from the belt chamber.

In view of this, an embodiment of the present application provides a front cover sealing structure of an oil control valve, referring to fig. 1 and 2, including:

a front cover 1 covering a variable timing system 20 of an oil control valve 3, wherein the front cover 1 is detachably provided with a central electromagnet 2, a first chamber 4 is formed among the oil control valve 3, the front cover 1, the variable timing system 20 and the central electromagnet 2, and a second chamber 5 is formed between the front cover 1 and the variable timing system 20; a first sealing member 7, wherein the first sealing member 7 is disposed on a side of the front cover 1 facing the oil control valve 3 to prevent the oil in the first chamber 4 from overflowing to the second chamber 5.

In the embodiment of the present application, the central electromagnet 2 on the front cover 1 is detachably connected, referring to fig. 3 and 4, a fixing lug 16 is disposed on one side of the front cover 1 away from the oil control valve 3, the fixing lug 16 is located at the edge of the mounting hole 13, the front cover further includes a fixing bolt 15 for fixing the central electromagnet 2, a bolt hole for inserting the fixing bolt 15 is formed in the central electromagnet 2, when the central electromagnet 2 is fixed, the fixing bolt 15 is screwed into the bolt hole and screwed into the fixing lug 16, and the fixing of the central electromagnet 2 is completed. And then the central electromagnet 2 can be conveniently detached through the connection mode.

The first sealing element 7 can effectively block the passage of the engine oil from the first chamber 4 to the second chamber 5, thereby achieving good oil sealing effect; and because the problem of oil sealing of the central engine oil control valve 3 is solved, the advantages of the central engine oil control valve 3 can be further improved.

In yet another optional embodiment, the method further comprises: an annular boss 10, wherein the annular boss 10 is positioned on one side of the front cover 1 facing the engine oil control valve 3;

the variable timing system 20 is partially installed in the inner ring of the annular boss 10, and an annular gap 11 exists between the part of the variable timing system 20 located in the annular boss 10 and the inner annular wall of the annular boss 10;

the first seal 7 is arranged in the annular gap 11.

In the embodiment of the present application, referring to fig. 2, the oil control valve 3 is connected to the variable timing system 20, and the variable timing system 20 is located at the end of the oil control valve 3. Wherein, the front cover 1 covers the engine oil control valve 3 and the variable timing system 20, an oil groove is formed on one side of the variable timing system 20 facing the central electromagnet 2, the variable timing system 20 and the engine oil control valve 3 are covered by the front cover 1, the central electromagnet 2 is installed on the front cover 1, and one part of the variable timing system 20 is positioned in the inner ring of the annular boss 10, so the central electromagnet 2, the front cover 1, the engine oil control valve 3 and the first part 301 of the variable timing system 20 enclose and form a first chamber 4.

In the embodiment of the present application, referring to fig. 2, the first chamber 4 is filled with engine oil, an annular gap 11 exists between a portion of the variable timing system 20 located in the annular boss 10 and an inner annular wall of the annular boss 10, and the engine oil can flow into the second chamber 5 along the annular gap 11, thereby affecting a dry belt and other portions in the variable timing system 20 in the second chamber 5; therefore, in order to prevent the oil from leaking from the first chamber 4 into the second chamber 5, the first seal 7 provided in the annular gap 11 blocks the annular gap 11, and blocks the passage of the oil leakage, thereby achieving an oil-sealing effect.

In the embodiment of the present application, referring to fig. 2, the first seal 7 is disposed on the inner annular wall of the annular boss 10, the first seal 7 is annular, the outer ring of the first seal 7 is fixedly connected to the inner annular wall of the annular boss 10, and the inner ring of the first seal 7 is disposed in contact with the portion of the oil control valve 3 located inside the annular boss 10. Because the first sealing element 7 is annular and the annular gap 11 between the annular boss and the variable timing system 20 is also annular, the annular gap 11 can be better sealed by the first sealing element 7, and the oil sealing effect is further enhanced.

In this embodiment, the first sealing element 7 may be a rubber sealing ring, and since rubber itself has a certain elastic force and can deform after being subjected to pressure, when the front cover 1 is installed, the front cover 1 covers the oil control valve 3 and the first sealing element 7 is pressed on the oil control valve 3, so that the first sealing element 7 and the oil control valve 3 are connected more closely, and an oil sealing effect is further enhanced.

In some embodiments, the first sealing element 7 may be made of a flexible material, and the first sealing element 7 has flexibility and can be deformed, and can also be pressed on the oil control valve 3 due to its own deformation when the front cover 1 is installed, and also has an effect of enhancing oil sealing, and the specific material thereof is not limited herein.

In other embodiments, the first sealing member 7 may be made of a rigid material, as long as the first sealing member 7 has a sealing effect on the oil control valve 3 and the annular boss 10, which is not limited herein.

In some embodiments, the connection manner of the first sealing element 7 and the annular boss 10 may be bonding, clipping, integral molding, etc., and is not limited herein.

In the embodiment, referring to fig. 2, the engine oil control valve further comprises a valve chamber cover 12 and a second sealing member 8 positioned between the valve chamber cover 12 and the engine oil control valve 3, a third chamber 6 is formed between the engine oil control valve 3 and the valve chamber cover 12, and the second sealing member 8 is positioned in the third chamber 6 to prevent the engine oil in the third chamber 6 from overflowing to the second chamber 5. The valve chamber cover 12 is close to the second portion 302 of the engine oil control valve 3, the engine oil is contained in the third chamber 6 formed between the engine oil control valve 3 and the valve chamber cover 12, and the third chamber 6 has a gap to communicate with the second chamber 5, and the engine oil in the third chamber 6 can overflow into the second chamber 5 through the gap, thereby affecting the dry belt and other portions of the variable timing system 20 in the second chamber 5; therefore, the second sealing element 8 has the effect of blocking the gap, so that the engine oil cannot overflow from the third chamber 6 to the second chamber 5, and the whole oil sealing capacity is stronger.

In the embodiment of the present application, referring to fig. 2, the second sealing element 8 is annular, the outer ring of the second sealing element 8 is fixedly connected to the sidewall of the valve chamber cover 12 that encloses the second chamber 5, and the inner ring of the second sealing element 8 is in contact with the sidewall of the oil control valve 3 that encloses the second chamber 5, so as to further enhance the oil sealing effect.

In the embodiment of the present application, referring to fig. 3, a mounting hole 13 for mounting the central electromagnet 2 is formed in the front cover 1, and referring to fig. 2, the front cover further includes a third sealing member 9, where the third sealing member 9 is disposed on the central electromagnet 2 to seal a gap between the central electromagnet 2 and the mounting hole 13.

In the embodiment of the present application, referring to fig. 2, the third seal 9 is annular, an inner annular wall of the third seal 9 is fixedly connected to the outer side of the central electromagnet 2, and an outer annular wall of the third seal 9 is provided in contact with an inner wall of the mounting hole 13. The third sealing element 9 has the effect of preventing the engine oil in the first chamber 4 from overflowing to the outside, and the overall oil sealing effect is further enhanced.

After solving the problem of oil leakage of the central oil control valve 3, the central oil control valve 3 has the following advantages compared with the side oil control valve 3:

the response speed of the VVT of the dry type belt transmission engine can be improved;

the control precision of the VVT of the dry type belt transmission engine can be improved;

the arrangement structure is simple, compact and reliable, and the integration of parts is high.

In the embodiment of the present application, referring to fig. 3 and 4, a positioning pin 17 is further disposed at an edge of the front cover 1, a positioning pin hole 18 is disposed on the positioning pin 17, and the front cover 1 can be fixed by the positioning pin 17 and the positioning pin hole 18.

In the embodiment of the application, refer to fig. 5 and 6, still include oil blanket frock 19, oil blanket frock 19 can carry out the shutoff with the aperture adaptation of mounting hole 13, prevents to maintain after dismantling central electromagnet 2, when needing to dismantle central electromagnet 2 and maintain, inserts oil blanket frock 19 in mounting hole 13, waits to maintain the back that finishes, dismantles oil blanket frock 19 again, effectively prevents the machine oil leakage in the first cavity 4 of maintenance in-process.

Generally speaking, the application provides a front cover sealing structure of an engine oil control valve and a vehicle, the front cover covers the engine oil control valve, a central electromagnet is detachably arranged on the front cover, a first cavity is formed among the engine oil control valve, the front cover and the central electromagnet, and a second cavity is formed between the front cover and the engine oil control valve; the first sealing element is arranged on one side, facing the engine oil control valve, of the front cover so as to prevent engine oil in the first cavity from overflowing to the second cavity. The scheme of the application designs the dry belt transmission engine, the dry belt transmission engine has the advantages of stable and noiseless operation, good buffering and vibration absorption effects, simple structure, convenience in maintenance and the like, and the engine oil control valve is of a central structure, and compared with a side engine oil control valve, the central engine oil control valve can improve the response speed of the dry belt transmission engine VVT and improve the control precision of the dry belt transmission engine VVT; owing to adopted first sealing member, can effectually block machine oil from the passageway of first cavity to second cavity to play good oil-sealed effect, solved the oil-sealed problem of the machine oil in the well formula machine oil control valve, and then solved through this application and can embody well formula machine oil control valve and dry-type belt drive engine's advantage simultaneously behind the oil-sealed problem, improved product competitiveness greatly.

It should be noted that, in this specification, each embodiment is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same as and similar to each other in each embodiment may be referred to.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or neither should the relative importance be understood or implied. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or terminal. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a process, article, or terminal device that comprises the element.

The technical solutions provided in the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the present application, and the content of the present specification should not be construed as limiting the present application. While various modifications of the illustrative embodiments and applications will be apparent to those skilled in the art based upon this disclosure, it is not necessary or necessary to exhaustively enumerate all embodiments, and all obvious variations and modifications can be resorted to, falling within the scope of the disclosure.

Claims (9)

1. A front cover sealing structure of an engine oil control valve is characterized by comprising:

the front cover (1) covers the engine oil control valve (3) and the variable timing system (20), a central electromagnet (2) is detachably arranged on the front cover (1), a first cavity (4) is formed among the engine oil control valve (3), the front cover (1), the variable timing system (20) and the central electromagnet (2), and a second cavity (5) is formed between the front cover (1) and the variable timing system (20); the first sealing piece (7) is arranged on one side, facing the engine oil control valve (3), of the front cover (1) so as to prevent engine oil in the first chamber (4) from overflowing to the second chamber (5).

2. The front cover seal structure of an oil control valve according to claim 1, further comprising:

an annular boss (10), wherein the annular boss (10) is positioned on one side of the front cover (1) facing the engine oil control valve (3);

the variable timing system (20) is partially mounted in the inner ring of the annular boss (10), and an annular gap (11) exists between the part of the variable timing system (20) located in the annular boss (10) and the inner annular wall of the annular boss (10);

the first seal (7) is arranged in the annular gap (11).

3. The front cover sealing structure of an engine oil control valve according to claim 2, characterized in that the first sealing member (7) is annular, the outer ring of the first sealing member (7) is fixedly connected with the inner annular wall of the annular boss (10), and the inner ring of the first sealing member (7) is arranged in contact with the part of the variable timing system (20) located in the annular boss (10).

4. The front cover seal structure of an oil control valve according to claim 1, further comprising:

a valve chamber cover (12);

a second seal (8) between the valve chamber cover (12) and the oil control valve (3);

a third chamber (6) is formed between the engine oil control valve (3) and the valve chamber cover (12), and the second sealing element (8) is positioned in the third chamber (6) to prevent the engine oil in the third chamber (6) from overflowing to the second chamber (5).

5. The front cover sealing structure of the engine oil control valve according to claim 4, characterized in that the second sealing element (8) is annular, the outer ring of the second sealing element (8) is fixedly connected with the cavity wall of the valve chamber cover cap (12) which encloses to form the second cavity (5), and the inner ring of the second sealing element (8) is arranged in contact with the cavity wall of the engine oil control valve (3) which encloses to form the second cavity (5).

6. A front cover seal structure of an oil control valve according to claim 1, wherein a mounting hole (13) for mounting the central electromagnet (2) is formed in the front cover (1), and the structure further comprises a third seal member (9), and the third seal member (9) is provided on the central electromagnet (2) to seal a gap between the central electromagnet (2) and the mounting hole (13).

7. The front cover sealing structure of an oil control valve according to claim 6, characterized in that the third sealing member (9) is annular, the inner annular wall of the third sealing member (9) is fixedly connected with the outer side of the central electromagnet (2), and the outer annular wall of the third sealing member (9) is arranged in contact with the inner wall of the mounting hole (13).

8. The front cover sealing structure of the engine oil control valve according to claim 1, characterized in that the material of the front cover (1) is aluminum alloy.

9. A vehicle characterized by comprising a front cover seal structure of the oil control valve according to any one of claims 1 to 8.

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