Engine oil control valve

Abstract

The utility model relates to the technical field of automobile engines, in particular to an engine oil control valve. The device comprises a hollow bolt, a return elastic piece, a reversing rod assembly and a plug, a first oil drainage hole is formed in the shaft end part of the hollow bolt; the return elastic piece is positioned in an inner hole of the hollow bolt; the reversing rod assembly is located in an inner hole of the hollow bolt, and the axial end of the reversing rod assembly is of an axial plugging structure and provided with a second oil drainage hole corresponding to the first oil drainage hole in position. The plug is matched with an inner hole in the shaft end of the hollow bolt to axially plug the inner hole, a stepped through hole is formed in the plug, the small-diameter section of the stepped through hole is matched with an axial plugging structure shaft hole to plug the stepped through hole when the reversing rod assembly moves, and the second oil drainage hole is located in the large-diameter section. An oil passing hole is formed in the plug so that the first oil drainage hole can communicate with the second oil drainage hole. Under the low-temperature working condition, the electromagnetic actuator is faster in response and higher in execution speed, and the risk that the push rod in the electromagnetic actuator moves to be stuck or stuck is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile engine, in particular to an oil control valve. BACKGROUND

[0002] The oil control valve (OCV valve for short) is an important component in the variable valve timing system, mainly used for adjusting the flow and pressure of the oil to realize the control of the variable valve timing. In some installation environments, the oil control valve is also in a rotating state when the engine is running.

[0003] The composition of the existing oil control valve usually includes a blocking ring, a reversing rod assembly, a return spring and a hollow bolt. The reversing rod assembly is coaxially arranged in the hollow bolt. An oil discharge port is arranged at one axial end of the reversing rod assembly. An oil passing hole and an oil inlet hole are arranged on the side surface of the reversing rod assembly. The other end of the reversing rod assembly is matched with the hollow bolt through the return spring. The reversing rod assembly is driven to move axially in the hollow bolt by an electromagnetic actuator. The oil passing hole and the oil inlet hole are also arranged on the side surface of the hollow bolt, so as to form a complete oil circuit together with the oil passing hole, the oil inlet hole and the oil discharge port on the reversing rod assembly. During the oil discharge process, the oil in the oil control valve will flow out from the oil discharge port along the axial direction. The oil will enter the electromagnetic actuator through the exhaust small hole of the electromagnetic actuator. At low temperature, the axial movement of the push rod of the electromagnetic actuator is hindered by the high viscosity of the oil, and the movement is slow. At the same time, the oil entering the electromagnetic actuator has impurities, and the push rod has the risk of movement jamming or sticking. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an oil control valve. By changing the oil discharge direction of the oil by changing the oil discharge port at one end of the reversing rod assembly from the axial direction to the radial direction, the amount of oil entering the electromagnetic actuator is reduced, and the problem that the oil in the existing oil control valve easily enters the electromagnetic actuator, hinders the movement of the push rod of the electromagnetic actuator, and the push rod has the risk of movement jamming or sticking is solved.

[0005] The present application is implemented by the following technical solutions:

[0006] An oil control valve, comprising:

[0007] A hollow bolt, a first oil discharge hole is arranged on the axial end of the hollow bolt;

[0008] A return elastic member is arranged in the inner hole of the hollow bolt;

[0009] A reversing rod assembly is arranged in the inner hole of the hollow bolt and is provided with an axial sealing structure at one axial end. A second oil discharge hole is arranged at the end corresponding to the position of the first oil discharge hole;

[0010] A plug is matched with the inner hole of the shaft end of the hollow bolt to form axial sealing of the inner hole, a stepped through hole is formed on the plug, the small diameter section of the stepped through hole is matched with the axial sealing structure shaft hole to seal the stepped through hole when the reversing rod assembly is active, and the second oil leakage hole is located in the large diameter section, wherein an oil passing hole is formed on the plug to communicate the first and second oil leakage holes.

[0011] The oil control valve provided by the application can prevent oil from flowing out of the shaft end of the hollow bolt in the axial direction of the hollow bolt after the shaft end of the hollow bolt is sealed by the plug. Instead, the oil reaches the oil passing hole of the plug through the second oil leakage hole of the reversing rod assembly or the gap between the reversing rod assembly and the inner wall of the large diameter section of the plug, and then reaches the outside of the oil control valve through the first oil leakage hole. The first oil leakage hole is formed on the shaft end, so the oil outflow direction is no longer in the axial direction of the original hollow bolt, but in the radial direction of the hollow bolt. This can greatly reduce the amount of oil entering the electromagnetic actuator, and the oil resistance experienced by the push rod in the electromagnetic actuator is smaller under low temperature conditions, thereby improving the response time and execution speed of the electromagnetic actuator under low temperature conditions. At the same time, since the amount of oil entering the electromagnetic actuator is reduced, the risk of movement jamming or sticking of the push rod in the electromagnetic actuator is also relatively reduced.

[0012] The oil control valve provided by the application can be used on a vehicle, but is not limited thereto.

[0013] In some optional embodiments, the number of first oil leakage holes is multiple and arranged at intervals in the circumferential direction of the hollow bolt.

[0014] In some optional embodiments, the number of second oil leakage holes is equal to the number of first oil leakage holes.

[0015] In some optional embodiments, the first oil leakage holes are uniformly distributed in the circumferential direction of the hollow bolt.

[0016] In some optional embodiments, the return elastic member is a coil spring.

[0017] In some optional embodiments, the shape of the plug is adapted to the shape of the inner hole of the shaft end of the hollow bolt.

[0018] In some optional embodiments, a limiting groove is formed in the shaft end from the end face inward, and a positioning protrusion adapted to the limiting groove is arranged on the outer wall of the plug.

[0019] In some optional embodiments, the axial sealing structure is cylindrical.

[0020] Compared with the prior art, the application has the following advantages and beneficial effects:

[0021] The oil control valve provided in this application, after sealing the shaft end of the hollow bolt with a plug, prevents the oil from flowing out of the shaft end of the hollow bolt along the axial direction. Instead, the oil flows through the second drain hole on the reversing rod assembly or the gap between the reversing rod assembly and the inner wall of the large-diameter section of the plug to the oil passage hole of the plug, and then through the first drain hole to the outside of the oil control valve. The first drain hole is located on the shaft end. Therefore, the oil outlet direction is no longer along the original axial direction of the hollow bolt, but flows out radially to the outside of the oil control valve. This can greatly reduce the amount of oil entering the electromagnetic actuator. Under low temperature conditions, the oil resistance of the push rod in the electromagnetic actuator is smaller, thereby improving the response time and execution speed of the electromagnetic actuator under low temperature conditions. At the same time, due to the reduction in the amount of oil entering the electromagnetic actuator, the risk of the push rod in the electromagnetic actuator getting stuck or jammed is also relatively reduced. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the embodiments of this application and form part of this application, do not constitute a limitation on the embodiments of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the exploded structure of the oil control valve provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the commutator assembly structure provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of a hollow bolt structure provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the plug structure provided in an embodiment of this application;

[0027] Figure 5 A cross-sectional structural diagram of the oil control valve in the first working mode provided in the embodiment of this application;

[0028] Figure 6 This is a cross-sectional structural diagram of the oil control valve in the second working mode provided in the embodiment of this application.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1-Hollow bolt, 11-First drain hole, 12-Limit groove, 13-First oil inlet hole, 14-First oil passage hole, 15-Second oil passage hole, 2-Return elastic element, 3-Reversing rod assembly, 31-Second drain hole, 32-Second oil inlet hole, 4-Plug, 41-Stepped through hole, 42-Third oil passage hole, 43-Positioning protrusion, 5-Electromagnetic actuator, 6-Cam phase adjuster. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with embodiments and drawings, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, but not to limit the present application.

[0032] As shown in Figures 1-4 The present application provides a kind of oil control valve, which comprises hollow bolt 1, return elastic element 2, reversing rod assembly 3 and plug 4;First oil drain hole 11 is set on the shaft end of hollow bolt 1;Return elastic element 2 is located in the inner hole of hollow bolt 1;Reversing rod assembly 3 is located in the inner hole of hollow bolt 1 and its axial one end is set as axial blocking structure, which is set with second oil drain hole 31 corresponding to the position of first oil drain hole 11;Plug 4 is matched with the inner hole of the shaft end of hollow bolt 1 to form axial blocking to the inner hole, and stepped through hole 41 is set on plug 4, the small diameter section of stepped through hole 41 is matched with the axial hole of axial blocking structure to block stepped through hole 41 when reversing rod assembly 3 moves, that is, when reversing rod assembly 3 moves under control, axial blocking structure can always be matched with the axial hole of small diameter section to block stepped through hole 41, and second oil drain hole 31 is located in large diameter section, wherein, oil passage is set on plug 4 to communicate first oil drain hole 11 and second oil drain hole 31.

[0033] The oil control valve provided by the present application blocks the shaft end of hollow bolt 1 by plug 4, so that oil no longer flows out from the shaft end of hollow bolt 1 along the axial direction of hollow bolt 1, but reaches the oil passage of plug 4 through second oil drain hole 31 on reversing rod assembly 3 or the gap between reversing rod assembly 3 and the inner wall of large diameter section in plug 4, and then reaches the outside of oil control valve through first oil drain hole 11, which is set on the shaft end, so that the oil outlet direction of oil is no longer along the axial direction of original hollow bolt 1, but along the radial direction of hollow bolt 1 to the outside of oil control valve, which can greatly reduce the amount of oil entering electromagnetic actuator 5, so that the oil resistance of push rod in electromagnetic actuator 5 is smaller under low temperature working condition, thereby improving the response time and execution speed of electromagnetic actuator 5 under low temperature working condition, and the risk of movement jamming or sticking of push rod in electromagnetic actuator 5 is also relatively reduced.

[0034] In the embodiment of the present application, the shaft end of the hollow bolt 1 is in the shape of an outer hexagonal nut, and the shaft body of the hollow bolt 1 is provided with an oil passing hole and an oil inlet hole; the return elastic member 2 can be contracted under the compression of the reversing rod assembly 3 to store elastic potential energy, so that the reversing rod assembly 3 can return to the original position under the action of the elastic force provided by the return elastic member 2 after the external force on the reversing rod assembly 3 is removed; the axial sealing structure of the reversing rod assembly 3 in the embodiment of the present application is different from the structure of the reversing rod assembly 3 in the existing oil control valve, and other structures can be the same, that is, the reversing rod assembly 3 is also provided with an oil passing hole and an oil inlet hole, and the inside of the reversing rod assembly 3 is hollow, and the oil can pass through the oil passing hole or the oil inlet hole to the inside of the reversing rod assembly 3, and then pass through the second oil outlet hole 31 to the outside of the reversing rod assembly 3.

[0035] In the embodiment of the present application, the axial sealing structure refers to the structure of sealing one end of the reversing rod assembly 3, that is, the oil entering the reversing rod assembly 3 cannot flow out from one end of the reversing rod assembly 3 along the axial direction of the reversing rod assembly 3; for example, in actual implementation, one end of the reversing rod assembly 3 is in the structure of a hollow cylinder, the axial end of the hollow cylinder structure is a closed structure, and the second oil outlet hole 31 is provided on the side wall of the hollow cylinder structure, wherein the axial direction of the second oil outlet hole 31 can be arranged to coincide with the radial direction of the hollow bolt 1.

[0036] In some optional embodiments, the number of the first oil outlet holes 11 is multiple and arranged at intervals along the circumferential direction of the hollow bolt 1.

[0037] In the embodiment of the present application, the arrangement of multiple first oil outlet holes 11 can improve the flow smoothness of the oil, and in actual implementation, one first oil outlet hole 11 can be provided on each face of the outer hexagonal nut shape of the shaft end, that is, the number of the first oil outlet holes 11 is six, and the axial direction of the first oil outlet hole 11 can be arranged to coincide with the radial direction of the hollow bolt 1; in other embodiments, the number of the first oil outlet holes 11 can be more or less; wherein the positions of the first oil outlet holes 11 in the axial direction of the hollow bolt 1 are not necessarily the same, that is, each first oil outlet hole 11 can be located in multiple circumferential directions of the hollow bolt 1, in order to ensure uniform oil outlet, in some embodiments, each first oil outlet hole 11 is arranged at intervals in the same circumferential direction of the hollow bolt 1, that is, all the first oil outlet holes 11 are located on the same circumference of the hollow bolt 1; further, each first oil outlet hole 11 can be arranged to be uniformly distributed to further ensure uniform oil outlet.

[0038] It can be understood that when the number of the first oil outlet holes 11 and the second oil outlet holes 31 is multiple, the number of the oil passing holes on the plug 4 is also multiple, and the number of the oil passing holes on the plug 4 is equal to the number of the first oil outlet holes 11.

[0039] In order to improve the oil outlet efficiency while ensuring the relative balance of the oil outlet amount and speed of each first oil drain hole 11, in some optional embodiments, the number of second oil drain holes 31 is equal to the number of first oil drain holes 11, wherein the first oil drain hole 11 and the corresponding second oil drain hole 31 can be designed as coaxial arrangement or staggered arrangement.

[0040] In some optional embodiments, the return elastic member 2 is a coil spring.

[0041] In the embodiments of the present application, the coil spring can be a standard part, which is convenient to obtain and has low cost, which will be conducive to the control of the manufacturing cost of the oil control valve, and the coil spring can provide stable elastic force, which is conducive to the reset of the reversing lever assembly 3.

[0042] The plug 4 serves to provide a limit for the reversing lever assembly 3, and therefore the plug 4 is relatively fixed with the hollow bolt 1, wherein the plug 4 and the hollow bolt 1 can form a relatively fixed state in any connection manner, as long as the shaft end portion can be plugged. In order to facilitate assembly, in some optional embodiments, the shape of the plug 4 is adapted to the shape of the inner hole of the shaft end portion of the hollow bolt 1, that is, the overall shape of the plug 4 is cylindrical, and the plug 4 and the inner hole of the shaft end portion can be in interference fit, and the stepped through hole 41 on the plug 4 extends in the axial direction of the plug 4.

[0043] In some optional embodiments, the shaft end portion is provided with a limiting groove 12 inwardly from the end face, and the outer wall of the plug 4 is provided with a positioning protrusion 43 adapted to the limiting groove 12; when the positioning protrusion 43 cooperates with the limiting groove 12, the oil passing hole on the plug 4 can correspond to the first oil drain hole 11 on the hollow bolt 1 one by one, which will facilitate the assembly of the plug 4 and the hollow bolt 1.

[0044] The cross-sectional shape of the stepped hole on the plug 4 can be various, such as triangular, rectangular, circular, oval, etc. In order to facilitate manufacturing while ensuring that the axial plugging structure can relatively smoothly slide in the small diameter section of the plug 4, in some optional embodiments, the axial plugging structure is cylindrical.

[0045] In order to facilitate description, the oil inlet hole on the hollow bolt 1 is named as the first oil inlet hole 13, the oil passing hole on the hollow bolt 1 is named as the first oil passing hole 14 and the second oil passing hole 15, the oil inlet hole on the reversing lever assembly 3 is named as the second oil inlet hole 32, and the oil passing hole on the plug 4 is named as the third oil passing hole 42.

[0046] As shown in Figure 5 , the oil inlet hole of the reversing lever assembly 3 is connected with the first oil inlet hole 13 of the hollow bolt 1 through the second oil inlet hole 32, and the oil passing hole of the reversing lever assembly 3 is connected with the first oil passing hole 14 of the hollow bolt 1 through the second oil passing hole 15. Figure 5In the first working mode, the gap between the hollow bolt 1 and the reversing lever assembly 3 is communicated with the second oil passing hole 15, the oil enters the gap between the hollow bolt 1 and the reversing lever assembly 3 through the first oil inlet hole 13, enters the cam phase adjuster 6 through the second oil passing hole 15, enters the inside of the reversing lever assembly 3 through the first oil passing hole 14 and the second oil inlet hole 32 in turn, and then enters the outside of the hollow bolt 1 through the second oil leakage hole 31, the third oil passing hole 42 and the first oil leakage hole 11 in turn.

[0047] In the first working mode, the gap between the hollow bolt 1 and the reversing lever assembly 3 is communicated with the second oil passing hole 15, the oil enters the gap between the hollow bolt 1 and the reversing lever assembly 3 through the first oil inlet hole 13, enters the cam phase adjuster 6 through the second oil passing hole 15, enters the inside of the reversing lever assembly 3 through the first oil passing hole 14 and the second oil inlet hole 32 in turn, and then enters the outside of the hollow bolt 1 through the second oil leakage hole 31, the third oil passing hole 42 and the first oil leakage hole 11 in turn. Figure 6 Figure 6 In the first working mode, the gap between the hollow bolt 1 and the reversing lever assembly 3 is communicated with the second oil passing hole 15, the oil enters the gap between the hollow bolt 1 and the reversing lever assembly 3 through the first oil inlet hole 13, enters the cam phase adjuster 6 through the second oil passing hole 15, enters the inside of the reversing lever assembly 3 through the first oil passing hole 14 and the second oil inlet hole 32 in turn, and then enters the outside of the hollow bolt 1 through the second oil leakage hole 31, the third oil passing hole 42 and the first oil leakage hole 11 in turn.

[0048] It can be seen that, in the first working mode or the second working mode, the oil flows out to the periphery of the hollow bolt 1, and no longer flows out along the axial direction of the hollow bolt 1. Thus, the amount of oil entering the electromagnetic actuator 5 can be effectively controlled. After the amount of oil in the electromagnetic actuator 5 is controlled, the oil resistance on the push rod in the electromagnetic actuator 5 is smaller in the low-temperature working condition, and the amount of impurities in the electromagnetic actuator 5 is also controlled. The probability of movement jamming or sticking of the push rod in the electromagnetic actuator 5 is greatly reduced.

[0049] ​The foregoing description of the exemplary embodiment of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of this disclosure. It was chosen and described in order to provide the best illustration of the principles of the application and its practical application to thereby enable others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. While the application has been described with reference to specific embodiments thereof, it will be clear to those of ordinary skill in the art that variations and modifications can be affected within the scope of the application. Accordingly, the application is not limited to the specific embodiments described herein, but instead includes all variations and modifications that fall within the scope of the appended claims and their equivalents.

[0050] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar elements, and therefore, once an element is defined in one drawing, further definition and repetition of it in subsequent drawings are omitted. In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are used only to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance. In the description of the application, it should be noted that unless otherwise specifically defined and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0051] It is obvious that those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalents, the application also intends to include these modifications and variations.

Claims

1. An engine oil control valve characterized by comprising: The utility model relates to a hollow bolt (1) which is provided with a first oil leakage hole (11) on the shaft end part of the hollow bolt (1). A return elastic member (2) is arranged in the inner hole of the hollow bolt (1). A reversing rod assembly (3) is arranged in the inner hole of the hollow bolt (1) and is provided with an axial sealing structure at one axial end, and the end is provided with a second oil leakage hole (31) corresponding to the position of the first oil leakage hole (11). A plug (4) is matched with the inner hole of the shaft end part of the hollow bolt (1) to form axial sealing of the inner hole, and the plug (4) is provided with a stepped through hole (41), the small diameter section of the stepped through hole (41) is matched with the axial sealing structure hole to seal the stepped through hole (41) when the reversing rod assembly (3) moves, and the second oil leakage hole (31) is arranged in the large diameter section, wherein the plug (4) is provided with an oil leakage hole to communicate the first oil leakage hole (11) and the second oil leakage hole (31). The number of the first oil leakage holes (11) is multiple and is arranged in a circumferential interval along the hollow bolt (1).

2. The oil control valve of claim 1, wherein The number of the second oil leakage holes (31) is equal to the number of the first oil leakage holes (11).

3. The oil control valve of claim 2, wherein The first oil leakage holes (11) are uniformly distributed in the circumferential direction of the hollow bolt (1).

4. The oil control valve of claim 2, wherein The return elastic member (2) is a spiral spring.

5. The oil control valve of claim 1, wherein The shape of the plug (4) is matched with the shape of the inner hole of the shaft end part of the hollow bolt (1).

6. The oil control valve of claim 1, wherein The shaft end part is provided with a limiting groove (12) from the end face to the inside, and the outer wall of the plug (4) is provided with a positioning protrusion (43) matched with the limiting groove (12).

7. The oil control valve of claim 6, wherein The axial sealing structure is a cylinder.

8. The oil control valve of claim 1, wherein ​

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