Central engine oil control valve

Abstract

The utility model provides a central engine oil control valve which comprises a valve shell, a valve sleeve and a valve element, an oil inlet is formed in the front end of the valve shell, and an oil outlet is formed in the rear end of the valve shell. The valve sleeve is coaxially arranged in the valve shell, a front oil cavity and a rear oil cavity are formed in the valve sleeve, the front oil cavity is communicated with the oil inlet, and the valve element is arranged in the rear oil cavity; the outer wall of the valve sleeve is sleeved with a radial one-way valve, the radial one-way valve is arranged close to the oil inlet hole, when the radial one-way valve contracts inwards in the radial direction, the oil inlet hole is closed, and when the radial one-way valve opens outwards in the radial direction, the oil inlet hole is opened; and the valve core is movably arranged in the rear oil cavity. According to the central engine oil control valve, the traditional peripheral oil charging mode is changed, so that the opening, closing and response speed of the radial one-way valve is not influenced and is smoother, the overall performance is improved, the structure is simple, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of oil control valve structure design, in particular to a central oil control valve. Background Art

[0002] The central oil control valve is the core control component of the engine VVT system, which is used to control the flow of oil to maintain the normal operation of the engine. Its structure is generally composed of core parts such as valve housing, valve sleeve, valve core, and one-way valve, which have the functions of bolt tightening, oil distribution, oil check, etc. In the prior art, the one-way valve of the central oil control valve is generally set in the form of an annular one-way valve. Since the existing central oil control valve generally adopts peripheral oil filling, when the oil passes through the one-way valve, the opening direction of the one-way valve is to compress the one-way valve from the outside to the inside through the extrusion of the oil, so as to achieve the smooth passage of the oil. However, this method will cause the annular one-way valve to be subjected to a greater oil extrusion force in order to open the annular one-way valve smoothly. The consequence is that the one-way valve is affected by the shape and force, and its opening, closing and response speed will be reduced, thereby affecting the overall oil mixing performance of the central oil control valve. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing central oil control valve generally adopts peripheral oil filling. When the oil passes through the one-way valve, the opening direction of the one-way valve is to compress the one-way valve from the outside to the inside through the extrusion of the oil, so as to achieve the smooth passage of the oil. However, this method will cause the annular one-way valve to be subjected to a greater oil extrusion force in order to enable the annular one-way valve to open smoothly. The consequence is that the one-way valve is affected by the shape and force, and its opening, closing and response speeds will be reduced, thereby affecting the overall oil mixing performance of the central oil control valve. In order to overcome the above defects of the prior art, the utility model provides a central oil control valve.

[0004] The utility model provides a central oil control valve, which comprises a valve housing, a valve sleeve and a valve core. An oil inlet is arranged at the front end of the valve housing, an oil outlet is arranged at the rear end of the valve housing, and a first working connection hole and a second working connection hole are arranged on the housing wall of the valve housing; The valve sleeve is coaxially arranged inside the valve housing. A front oil cavity and a rear oil cavity are arranged inside the valve sleeve. The front oil cavity is communicated with the oil inlet, the rear oil cavity is for the valve core to be placed in, an oil inlet channel communicating the front oil cavity and the rear oil cavity is arranged on the outer wall of the valve sleeve, and an oil inlet hole communicating the oil inlet channel is arranged on the cavity wall of the front oil cavity; A radial check valve is sleeved on the outer wall of the valve sleeve and is arranged close to the oil inlet hole. When the radial check valve contracts radially inwards, the oil inlet hole is closed. When the radial check valve expands radially outwards, the oil inlet hole is closed; The valve core is movably arranged in the rear oil cavity and is used for controlling the communication between the oil inlet and the first working connection hole or the second working connection hole, and controlling the communication between the oil outlet and the first working connection hole or the second working connection hole.

[0005] Compared with the prior art, a central oil control valve of the present application has the following advantages: Through the oil inlet arranged at the front end of the valve housing and the oil outlet arranged at the rear end of the valve housing, the peripheral oil filling mode of the conventional central oil control valve is changed. The oil is directly introduced into the front oil cavity arranged inside the valve sleeve through the oil inlet, and then through the radial check valve sleeved on the outer wall of the valve sleeve, when the radial check valve contracts radially inwards, the oil inlet hole is closed. When the radial check valve expands radially outwards, the oil inlet hole is opened, so that the oil can flow into the rear oil cavity through the oil inlet channel. The radial check valve changes the conventional way of opening by inward contraction, so that under the extrusion of the oil, the radial check valve expands and opens, which is more in line with the force received by the radial check valve, and is easy to expand and easy to rebound. Therefore, the reduction of the opening and closing and response speed of the check valve is avoided, and the overall oil distribution performance of the central oil control valve is ensured.

[0006] In a possible implementation manner, the radial check valve comprises an annular elastic steel ring, and two ends of the elastic steel ring are radially attached.

[0007] Compared with the prior art, adopting the above technical solution can improve the effect of the radial check valve expanding and opening and rebounding and closing through the setting of the annular elastic steel ring of the radial check valve, and make it more durable and not easy to undergo plastic deformation.

[0008] In a possible implementation manner, a positioning ring groove is arranged on the outer wall of the valve sleeve, and the elastic steel ring is clamped in the positioning ring groove.

[0009] Compared with the prior art, adopting the above technical solution can, while facilitating the fixing of the elastic steel ring through the positioning ring groove arranged on the outer wall of the valve sleeve, also play a role in limiting the elastic steel ring to prevent the displacement of the elastic steel ring after long-term use, thus affecting the use performance of the control valve.

[0010] In a possible implementation, first oil holes and second oil holes which are axially spaced are provided on the sleeve wall of the valve sleeve. The first oil holes are communicated with first working connection holes, and the second oil holes are communicated with second working connection holes. The valve core is coaxially and slidably connected in the rear oil cavity. A ring-shaped oil groove communicating with an oil inlet passage is provided on the outer wall of the valve core. When the valve core moves towards the first oil holes, the ring-shaped oil groove is communicated with the first oil holes; when the valve core moves towards the second oil holes, the ring-shaped oil groove is communicated with the second oil holes.

[0011] Compared with the prior art, adopting the above technical solution can realize the switching between two working modes of the central oil control valve. That is, when the valve core moves towards the first oil holes, the ring-shaped oil groove is communicated with the first oil holes, and the flow sequence of the oil is: oil inlet, oil inlet hole, radial one-way valve, oil inlet passage, ring-shaped oil groove, first oil holes, first working connection holes; when the valve core moves towards the second oil holes, the ring-shaped oil groove is communicated with the second oil holes, and the flow sequence of the oil is: oil inlet, oil inlet hole, radial one-way valve, oil inlet passage, ring-shaped oil groove, second oil holes, second working connection holes.

[0012] In a possible implementation, an opening communicating with the rear oil cavity is provided at the rear end of the valve sleeve. When the valve core moves towards the first oil holes, the second oil holes are communicated with an oil drain port through the opening.

[0013] Compared with the prior art, adopting the above technical solution can, during the switching between two working modes, when the second working connection holes are switched to the first working connection holes, the oil in the second oil holes can be discharged from the oil drain port through the opening provided at the rear end of the valve sleeve and communicating with the rear oil cavity.

[0014] In a possible implementation, a through hole communicating with the oil drain port is provided in the valve core. When the valve core moves towards the second oil holes, the first oil holes are communicated with the oil drain port through the through hole.

[0015] Compared with the prior art, adopting the above technical solution can, during the switching between two working modes, when the first working connection holes are switched to the second working connection holes, the oil in the first oil holes can be discharged from the oil drain port through the through hole provided in the valve core and communicating with the oil drain port.

[0016] In a possible implementation, a spring is provided in the rear oil cavity. The front end of the spring abuts against the bottom of the rear oil cavity, and the rear end of the spring abuts against the valve core.

[0017] Compared with the prior art, adopting the above technical solution can, through the spring provided in the rear oil cavity, provide a reset power for the reciprocating movement of the valve core.

[0018] In a possible implementation, a gear retaining ring is provided at the opening of the valve sleeve, and the gear retaining ring is used to prevent the valve core from disengaging from the opening.

[0019] Compared with the prior art, adopting the above technical solution can limit the spool through the retaining circlip provided at the opening of the valve sleeve, preventing the spool from disengaging from the opening.

[0020] In a possible implementation manner, a filter screen is provided at the connection between the front oil chamber and the oil inlet.

[0021] Compared with the prior art, adopting the above technical solution can filter the engine oil by setting a filter screen at the connection between the front oil chamber and the oil inlet, filtering impurities in the engine oil, preventing the impurities from accumulating in the central engine oil control valve, and thus affecting the service life of the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded schematic view of the central engine oil control valve of the present utility model;

[0023] Figure 2 is a cross-sectional view of the present utility model;

[0024] Figure 3 is a cross-sectional view of the valve housing of the present utility model;

[0025] Figure 4 is a cross-sectional view of the valve sleeve of the present utility model;

[0026] Figure 5 is a cross-sectional view of the spool of the present utility model;

[0027] Figure 6 is a structural schematic view of the radial one-way valve.

[0028] Description of the reference numerals:

[0029] 1. Valve housing; 11. Oil inlet; 12. Oil drain port; 13. First working connection hole; 14. Second working connection hole; 2. Valve sleeve; 21. Front oil chamber; 211. Oil inlet hole; 212. Filter screen; 22. Rear oil chamber; 221. Spring; 23. Oil inlet channel; 24. Radial one-way valve; 25. Positioning ring groove; 26. First oil hole; 27. Second oil hole; 28. Opening; 281. Retaining circlip; 3. Spool; 31. Annular oil groove; 32. Through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0031] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0032] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0033] The following further describes the present application in detail with reference to the accompanying drawings and specific embodiments.

[0034] See Figures 1 to 6 , an embodiment of the present application discloses a central oil control valve, including a valve housing 1, a valve sleeve 2 and a valve core 3. An oil inlet 11 is provided at the front end of the valve housing 1, an oil drain 12 is provided at the rear end of the valve housing 1, and a first working connection hole 13 and a second working connection hole 14 are provided on the wall of the valve housing 1; the valve sleeve 2 is coaxially arranged inside the valve housing 1, a front oil chamber 21 and a rear oil chamber 22 are provided inside the valve sleeve 2, the front oil chamber 21 is communicated with the oil inlet 11, the rear oil chamber 22 is for the valve core 3 to be placed in, an oil inlet passage 23 communicating the front oil chamber 21 and the rear oil chamber 22 is provided on the outer wall of the valve sleeve 2, and an oil inlet hole 211 communicating with the oil inlet passage 23 is provided on the wall of the front oil chamber 21; a radial check valve 24 is sleeved on the outer wall of the valve sleeve 2, the radial check valve 24 is arranged close to the oil inlet hole 211, when the radial check valve 24 contracts radially inward, the oil inlet hole 211 is closed, and when the radial check valve 24 expands radially outward, the oil inlet hole 211 is opened; the valve core 3 is movably arranged in the rear oil chamber 22, and is used to control the communication between the oil inlet 11 and the first working connection hole 13 or the second working connection hole 14, and control the communication between the oil drain 12 and the first working connection hole 13 or the second working connection hole 14.

[0035] Specifically, to improve the effect of the radial check valve 24 expanding and opening and rebounding and closing, and make it more durable and not prone to plastic deformation, the radial check valve 24 includes an annular elastic steel ring, and the two ends of the elastic steel ring are radially fitted.

[0036] Specifically, to facilitate the fixation of the elastic steel ring and also play a role in limiting the elastic steel ring to prevent the displacement of the elastic steel ring after long-term use, a positioning ring groove 25 is provided on the outer wall of the valve sleeve 2, and the elastic steel ring is clamped in the positioning ring groove 25.

[0037] As can be known from the above, the engine oil enters through the oil inlet 11 provided at the front end of the valve housing 1 and directly enters the front oil cavity 21 provided in the valve sleeve 2. An oil inlet hole 211 is provided on the cavity wall of the front oil cavity 21, and the oil inlet hole 211 is connected to an oil inlet passage 23 provided on the outer wall of the valve sleeve 2 and communicating the front oil cavity 21 and the rear oil cavity 22. The radial one-way valve 24 is sleeved on the positioning ring groove 25 and covers the oil inlet hole 211. The engine oil passes through the oil inlet hole 211 and presses the radial one-way valve 24 to cause it to expand and open. The engine oil flows through the radial one-way valve 24 to the oil inlet passage 23 and then to the rear oil cavity 22. A valve core 3 is movably arranged in the rear oil cavity 22, and the valve core 3 is used to switch between the two working modes of the central engine oil control valve. This central engine oil control valve changes the peripheral oil filling method of the conventional central engine oil control valve, so that the opening, closing and response speed of the radial one-way valve 24 are not only not affected, but also can be more smooth, thereby improving the overall performance of the central engine oil control valve when controlling the flow of engine oil, and the structure of this central engine oil control valve is simpler and the cost is lower.

[0038] In this embodiment, a first oil hole 26 and a second oil hole 27 are axially spaced on the sleeve wall of the valve sleeve 2. The first oil hole 26 is connected to the first working connection hole 13, and the second oil hole 27 is connected to the second working connection hole 14. The valve core 3 is coaxially and slidably connected in the rear oil cavity 22. A ring-shaped oil groove 31 communicating with the oil inlet passage 23 is provided on the outer wall of the valve core 3. When the valve core 3 moves towards the first oil hole 26, the ring-shaped oil groove 31 communicates with the first oil hole 26; when the valve core 3 moves towards the second oil hole 27, the ring-shaped oil groove 31 communicates with the second oil hole 27.

[0039] Specifically, to enable the engine oil in the second oil hole 27 to be discharged when the second working connection hole 14 is switched to the first working connection hole 13 during the switching process between the two working modes, an opening 28 communicating with the rear oil cavity 22 is provided at the rear end of the valve sleeve 2. When the valve core 3 moves towards the first oil hole 26, the second oil hole 27 communicates with the oil drain port 12 through the opening 28.

[0040] Specifically, to enable the engine oil in the first oil hole 26 to be discharged when the first working connection hole 13 is switched to the second working connection hole 14 during the switching process between the two working modes, a through hole 32 communicating with the oil drain port 12 is provided in the valve core 3. When the valve core 3 moves towards the second oil hole 27, the first oil hole 26 communicates with the oil drain port 12 through the through hole 32.

[0041] Specifically, to provide a reset force for the reciprocating movement of the valve core 3, a spring 221 is provided in the rear oil chamber 22. The front end of the spring 221 abuts against the bottom of the rear oil chamber 22, and the rear end of the spring 221 abuts against the valve core 3.

[0042] Specifically, to limit the valve core 3 and prevent it from disengaging from the opening 28, and at the same time limit the amount of oil discharged during oil drainage and reduce the oil drainage pressure at the oil drainage port 12, a retaining snap ring 281 is provided at the opening 28 of the valve sleeve 2. The retaining snap ring 281 is used to prevent the valve core 3 from disengaging from the opening 28.

[0043] As can be known from the above, the switching between the two working modes of the central oil control valve can be realized. Mode 1: When the valve core 3 moves towards the first oil hole 26, the annular oil groove 31 communicates with the first oil hole 26. The flow sequence of the oil is: oil inlet 11, oil inlet hole 211, radial one-way valve 24, oil inlet passage 23, annular oil groove 31, first oil hole 26, first working connection hole 13. Since the valve core 3 reciprocates, when switching to the first working connection hole 13, it means disconnecting from the second working connection hole 14. The oil in the second oil hole 27 can pass through the opening 28 provided at the rear end of the valve sleeve 2 and communicating with the rear oil chamber 22, and then be discharged from the oil drainage port 12. Mode 2: When the valve core 3 moves towards the second oil hole 27, the annular oil groove 31 communicates with the second oil hole 27. The flow sequence of the oil is: oil inlet 11, oil inlet hole 211, radial one-way valve 24, oil inlet passage 23, annular oil groove 31, second oil hole 27, second working connection hole 14. At this time, the oil in the first oil hole 26 can pass through the through hole 32 provided in the valve core 3 and communicating with the oil drainage port 12, and then be discharged from the oil drainage port 12.

[0044] In this embodiment, a filter screen 212 is provided at the connection between the front oil chamber 21 and the oil inlet 11, thereby realizing the filtration of the oil, filtering impurities in the oil, and preventing the impurities from accumulating in the central oil control valve, thus affecting the service life of the control valve.

[0045] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms indicating the direction or positional relationship such as "inside" and "outside" are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present application.

[0046] In the description of the present application, the descriptions referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A central oil control valve, comprising a valve housing (1), a valve sleeve (2) and a valve core (3), characterized in that: The front end of the valve housing (1) is provided with an oil inlet (11), the rear end of the valve housing (1) is provided with an oil outlet (12), and the housing wall of the valve housing (1) is provided with a first working connection hole (13) and a second working connection hole (14); The valve sleeve (2) is coaxially arranged inside the valve housing (1). The valve sleeve (2) is provided with a front oil chamber (21) and a rear oil chamber (22). The front oil chamber (21) is communicated with the oil inlet (11), the rear oil chamber (22) is for the valve core (3) to be placed in. An oil inlet passage (23) communicating the front oil chamber (21) and the rear oil chamber (22) is provided on the outer wall of the valve sleeve (2), and an oil inlet hole (211) communicating the oil inlet passage (23) is provided on the chamber wall of the front oil chamber (21); A radial check valve (24) is sleeved on the outer wall of the valve sleeve (2). The radial check valve (24) is arranged close to the oil inlet hole (211). When the radial check valve (24) contracts radially inwards, the oil inlet hole (211) is closed. When the radial check valve (24) expands radially outwards, the oil inlet hole (211) is opened; The valve core (3) is movably arranged in the rear oil chamber (22) and is used to control the communication between the oil inlet (11) and the first working connection hole (13) or the second working connection hole (14), and control the communication between the oil outlet (12) and the first working connection hole (13) or the second working connection hole (14).

2. The central oil control valve according to claim 1, characterized in that The radial check valve (24) includes an annular elastic steel ring, and the two ends of the elastic steel ring are radially fitted.

3. The central oil control valve according to claim 2, wherein A positioning ring groove (25) is provided on the outer wall of the valve sleeve (2), and the elastic steel ring is clamped in the positioning ring groove (25).

4. The central oil control valve according to claim 1, characterized in that, First oil holes (26) and second oil holes (27) are axially spaced on the sleeve wall of the valve sleeve (2). The first oil hole (26) is communicated with the first working connection hole (13), and the second oil hole (27) is communicated with the second working connection hole (14). The valve core (3) is coaxially and slidably connected in the rear oil chamber (22). An annular oil groove (31) communicating the oil inlet passage (23) is provided on the outer wall of the valve core (3). When the valve core (3) moves towards the first oil hole (26), the annular oil groove (31) is communicated with the first oil hole (26); when the valve core (3) moves towards the second oil hole (27), the annular oil groove (31) is communicated with the second oil hole (27).

5. The central oil control valve according to claim 4, characterized in that, An opening (28) communicating the rear oil chamber (22) is provided at the rear end of the valve sleeve (2). When the valve core (3) moves towards the first oil hole (26), the second oil hole (27) is communicated with the oil outlet (12) through the opening (28).

6. The central oil control valve according to claim 5, characterized in that, A through hole (32) communicating the oil outlet (12) is provided in the valve core (3). When the valve core (3) moves towards the second oil hole (27), the first oil hole (26) is communicated with the oil outlet (12) through the through hole (32).

7. The central oil control valve according to claim 6, wherein A spring (221) is provided in the rear oil cavity (22). The front end of the spring (221) abuts against the bottom of the rear oil cavity (22), and the rear end of the spring (221) abuts against the valve core (3).

8. The central oil control valve according to claim 7, characterized in that, A gear position circlip (281) is provided at the opening (28) of the valve sleeve (2). The gear position circlip (281) is used to prevent the valve core (3) from disengaging from the opening (28).

9. The central oil control valve according to claim 1, wherein A filter screen (212) is provided at the connection between the front oil cavity (21) and the oil inlet (11).

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