WO2016148361A1

WO2016148361A1 - Oil jet solenoid valve

Info

Publication number: WO2016148361A1
Application number: PCT/KR2015/010672
Authority: WO
Inventors: 이창훈; 문국찬; 이지용; 박지훈; 심윤용
Original assignee: 주식회사 유니크
Priority date: 2015-03-18
Filing date: 2015-10-08
Publication date: 2016-09-22
Also published as: KR101696256B1; KR20160113345A

Abstract

The present invention relates to a solenoid valve which is used to control the flow of an oil for cooling and lubricating a piston, comprising: a hollow holder which consists of an upper body having a first operating space for connecting a plurality of ports formed thereinside, and a lower body which extends downward from the upper body and has a second operating space formed thereinside; a spool which is movably installed in the first operating space to turn the ports on or off; a spring which is installed in the first operating space and elastically supports the spool downwardly; a plunger which is movably installed in the second operating space and is in contact with the lower end of the spool; a bobbin which is joined around the circumference of the lower body and has a coil wound around the circumferential surface thereof; a plate which is located in the lower part of the bobbin and into which the lower end of the lower body is inserted; and a case which surrounds the holder, the bobbin, the housing, and the plate.

Description

Oil jet solenoid valve

The present invention relates to an oil jet solenoid valve, and more particularly to a solenoid valve used to control the flow of oil for cooling and lubricating the piston.

In general, automobiles are classified into gasoline vehicles using gasoline as a fuel, diesel vehicles using diesel as a fuel, and LPG vehicles using Liquefied Petroleum Gas (LPG) as fuel. For example, a diesel vehicle is usually powered by a high injection pressure of 100 to 300 atm in the air of 500 to 550 ° C. compressed in the combustion chamber at about 40 atm to obtain power, that is, injected with compressed heat of air. Fuel causes self-ignition and uses engines that convert thermal energy into mechanical energy.

An oil pan is installed in the lower part of the cylinder block constituting the engine, and the oil pan stores engine oil (lubricating oil) for cooling and lubrication. Oil stored in the oil pan is pumped to the main gallery by lubricators such as oil pan, oil strainer and oil pump, and supplied to the head gallery and oil jet gallery to cool and lubricate each part of the engine and then to the oil pan. It is recovered.

However, since the conventional lubrication method is configured to supply the same amount of oil for each gallery, when the amount of oil required in the gallery differs depending on the driving region and the operating state of the engine, oil is wasted. For example, when the engine brake is activated, the main and head galleries require large amounts of oil, but the oil jet gallery requires a relatively small amount of oil. The gallery has a problem with more oil than necessary.

In addition, regardless of the operating area and operating state of the engine, the pump pumping oil must be large in order to supply the same amount of oil in each gallery, and the fuel consumption is reduced because more power is consumed to operate a large capacity pump. . Accordingly, there is a need for a valve for adjusting the amount of oil supplied to the oil jet gallery in accordance with the operating region and operating conditions of the engine.

The present invention relates to a solenoid valve installed between a main gallery and an oil jet gallery. The present invention provides an oil jet solenoid valve capable of minimizing frictional resistance generated during movement of a spool and relieving the operating resistance of a plunger. There is a purpose.

Oil jet solenoid valve according to the present invention for achieving the above object is the upper body formed therein the first operating space for connecting a plurality of ports and the lower body extending downward from the upper body and the second operating space formed therein A hollow holder comprising: a spool movably installed in the first operating space to connect or block the port; a spring installed in the first operating space and elastically supporting the spool downward; and the second A plunger movably installed in the operating space to move the spool, a bobbin coupled to the circumference of the lower body and wound with a coil on an outer circumferential surface, a plate positioned below the bobbin and inserted into a lower end of the lower body; And a case surrounding the holder, the bobbin, the housing, and the plate.

In the above-described configuration, the spool includes a large diameter portion contacting the inner wall of the first operating space and a small diameter portion spaced apart from the inner wall of the first operating space. In addition, the spool is formed with a flow path connecting the top and bottom of the spool.

A connecting passage is formed between the first operating space and the second operating space, and a rod is installed in the connecting passage so as to be movable.

The connecting passage has a smaller diameter than the first operating space and the second operating space, and a cylindrical stopper is installed at a lower end of the connecting passage, and the stopper is lower than an upper surface of the second operating space. It protrudes.

The upper surface of the plate is formed with a mounting groove into which the lower end of the lower body is inserted, the lower end of the lower body is spaced apart from the bottom of the mounting groove.

According to the present invention configured as described above, since only a part of the spool is moved in contact with the inner wall of the first operating space during operation of the valve, the frictional resistance generated during the movement of the spool can be minimized. In particular, since the rod moving with the spool is formed with a smaller diameter than the connecting passage, precision processing is not required when manufacturing the rod, thereby reducing labor and cost.

In addition, in the present invention, the stopper installed in the connection passage protrudes into the second working space to separate the plunger which is raised when the power is applied from the upper surface of the second working space. Therefore, the operating resistance of the plunger generated by the magnetic field remaining in the holder when the power supply is cut off can be eliminated.

In addition, the present invention is spaced apart from the bottom of the mounting groove in a state in which the lower body of the holder is inserted into the mounting groove of the plate, preventing the lower body from contacting the plate in the process of caulking the bottom of the case when assembling the valve can do.

1 is a front view of an oil jet solenoid valve according to an embodiment of the present invention.

2 is a plan view of an oil jet solenoid valve according to an embodiment of the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is an operating state of the oil jet solenoid valve according to an embodiment of the present invention.

5 is a cross-sectional view of an oil jet solenoid valve according to another embodiment of the present invention.

6 is a cross-sectional view of an oil jet solenoid valve according to another embodiment of the present invention.

100: holder 200: spool

300: spring 400: plunger

500: bobbin 600: coil

700: housing 800: plate

900: case

With reference to the accompanying drawings will be described embodiments of the present invention; In the following description of embodiments according to the present invention, and in adding reference numerals to the components of each drawing, the same reference numerals are added to the same components as much as possible even though they are shown in different drawings.

As shown in FIGS. 1 to 3, an oil jet solenoid valve (hereinafter referred to as a “valve”) according to an embodiment of the present invention includes a hollow holder 100 having first and

second operating spaces

132 and 134 formed therein. ), A spool 200 and a spring 300 installed in the first operating space 132, a plunger 400 movably installed in the second operating space 134, and a bobbin coupled to the holder 100. 500, the coil 600 wound around the outer circumferential surface of the bobbin 500, the housing 700 surrounding the circumference of the bobbin 500, the plate 800 coupled to the lower end of the holder 100, the circumference of the valve It includes a case 900 surrounding the.

Holder 100 is a multi-stage cylindrical shape consisting of the upper body 110 and the lower body 120. The upper body 110 of the holder 100 is formed with a larger diameter than the lower body 120. A supply port 112 connected to the main gallery (not shown) is formed at the middle of the upper body 110, and a control port 114 connected to an oil jet gallery (not shown) is formed on an upper surface of the upper body 110. . In addition, a first operating space 132 connecting the supply port 112 and the control port 114 is formed inside the upper body 110.

The oil pumped from the main galler and introduced into the supply port 112 is controlled by the spool 200 in a process of being transported along the first operating space 132 and then through the control port 114. Ejected to an oil jet gallery (not shown). In this case, an annular filter 116a is provided at the middle of the upper body 110, and a plate-shaped filter 116b is installed at the upper surface of the upper body 110.

The lower body 120 of the holder 100 has a cylindrical shape having a diameter smaller than that of the upper body 110. Magnetic reinforcement grooves 122 are formed in the middle of the lower body 120. The magnetic reinforcement groove 122 is manufactured in a tapered shape that becomes narrower toward the center of the lower body 120 so that the magnetic field generated around the lower body 120 is concentrated in the magnetic reinforcement groove 122. As such, when the magnetic field is concentrated and the magnetic flux density of the magnetic reinforcement groove 122 is increased, sufficient magnetic force may be secured to smoothly move the plunger 400.

The second operating space 134 is formed in the lower body 120, and the plunger 400 is installed in the second operating space 134 to be movable. The second working space 134 is connected to the first working space 132 through a connection passage 136. The connection passage 136 has a smaller diameter than the first and

second operating spaces

132 and 134, and an insertion groove 138 for installing the stopper 140 is formed at a lower end thereof.

The stopper 140 is a means for limiting the rise of the plunger 400. That is, the lower end of the stopper 140 protrudes into the second operating space 134 to limit the rise of the plunger 400 to prevent the plunger 400 from contacting the upper surface of the second operating space 134. This is to solve the operating resistance of the plunger 400 due to the magnetic field remaining in the holder 100 when the power is cut off.

In more detail about the operating resistance of the plunger 400 due to the residual magnetic field, the magnetic field generated around the holder 100 (that is, the lower body 120) when the power is applied does not disappear even if the power is cut off the lower body for a predetermined time It remains at 120. This residual magnetic field interferes with the movement (falling) of the plunger 400, and the influence of the residual magnetic field is greater when the plunger 400 is in contact with the upper surface of the second operating space 134.

In this embodiment, by using the stopper 140 to separate the plunger 400 from the upper surface of the second operating space 134, it is possible to solve the operating resistance of the plunger 500 by the magnetic field remaining in the lower body 120. In particular, when the non-magnetic stopper 140 is used, the effect of the residual magnetic field can be reliably blocked to more effectively solve the operating resistance of the plunger 400.

The spool 200 is installed to be movable in the first operating space 132 to open or close the supply port 112 and to control the oil introduced through the supply port 112 to a predetermined pressure.

The spool 200 has a multistage cylindrical shape including a large diameter portion 210 and a small diameter portion 220. The large diameter portion 210 of the spool 200 is formed to have the same diameter as the inner diameter of the first operating space 132 to contact the inner wall of the first operating space 132 when the spool 200 moves. The small diameter portion 220 of the spool 200 is formed to have a smaller diameter than the large diameter portion 210 and is spaced apart from the inner wall of the first operating space 132. Since the spool 200 having such a shape can reduce the contact area with the first operating space 132, the frictional resistance generated during the movement of the spool 200 can be minimized.

The flow path 230 is formed inside the spool 200. The flow path 230 connects the first operating space 132 partitioned by the spool 200 to operate the resistance of the spool 200 by the oil filled in the first operating space 132 when the spool 200 is moved. To solve the problem.

A mounting groove 212 is formed on an upper surface of the large diameter portion 210 of the spool 200, and a spring 300 that elastically supports the spool 200 downward is installed in the mounting groove 212. The rod 240 is press-fitted to the lower surface of the small diameter portion 220, and the rod 240 extends through the connection passage 136 to the second operation space 134. At this time, the rod 240 is formed with a smaller diameter than the connection passage 136, there is no fear that friction resistance with the connection passage 124 is generated during the movement.

The spool 200 has a structure in which the rod 240 is press-fitted, and the spool 200 and the rod 240 are disposed on the same axis, so that the distance between the connection passage 136 and the rod 240 is constant. I can keep it. Therefore, it is possible to solve the operating resistance by the oil moving the first operating space 132 and the second operating space 134.

The bobbin 500 has a spool shape in which a flange 510 is formed at an upper end and a lower end. The flange 510 serves to guide the coil 600 to be wound to a certain thickness while protecting the coil 600 wound around the outer circumferential surface of the bobbin 500.

The coil 600 is a conductive wire that generates a magnetic field around the bobbin 500. The coil 600 is tightly and uniformly wound around the outer circumferential surface of the bobbin 500 to form a cylindrical shape of a constant thickness. The magnetic field generated in the coil 600 is concentrated in the magnetic reinforcement groove 122 to move (raise) the plunger 400. In this case, the strength of the magnetic field for moving the plunger 400 is proportional to the strength of the current flowing along the coil 600 and the number of coils 600 wound on the bobbin 500. Therefore, when a high current is applied to the coil 600 and when the coil 600 is wound up a lot, a strong magnetic field may be generated to reliably control the movement of the plunger 400.

The plunger 400 is a movable iron core movably installed in the second operation space 134 to reciprocate by a magnetic field generated in the coil 600. The plunger 400 has a passage 410 penetrating the plunger 400 up and down. The passage 410 connects the second operation space 134 partitioned by the plunger 400 to operate the resistance of the plunger 400 by the oil filled in the second operation space 134 when the plunger 400 moves. To solve the problem. At this time, the passage 410 is eccentric a predetermined distance from the center of the plunger 400, to prevent the passage 410 is closed by the contact with the rod 240.

The lower surface of the plunger 400 is formed into a curved surface to make point contact with the bottom of the plate 800. When the plunger 400 and the plate 800 make point contact, the plunger 400 can be smoothly moved by blocking the flow of the magnetic field leading to the plunger 400 through the bottom of the plate 800. In addition, even if the bottom of the plate 800 is slightly inclined, the frictional resistance due to the inclination of the plunger 400 may be eliminated without affecting the inclination of the plunger 400.

The housing 700 is formed to surround the bobbin 500, and a connector 710 is formed at one side. The terminal 720 is electrically connected to the coil 600 in the connector 710.

The plate 800 is a fixed iron core for inducing a magnetic field generated in the coil 600 to move the plunger 400 which is a movable iron core. The plate 800 is located at the bottom of the bobbin 400 and is coupled to the bottom of the lower body 120. To this end, a mounting groove 810 into which the lower end of the lower body 120 is inserted is formed on the upper surface of the plate 800. At this time, the lower end of the lower body 120 inserted into the mounting groove 810 is spaced apart from the bottom of the mounting groove 810. Therefore, when the plate 800 is assembled, the deformation caused by the contact between the lower body 120 and the plate 800, that is, the deformation of the lower body 120 may be prevented.

The case 900 is a cylindrical shape in which the top and bottom are open. An interior of the case 900 includes a storage space 910, and components 100 to 800 including the bobbin 500 are installed in the storage space 910. The lower end of the case 900 is caulked to surround the plate 800 so that the parts 100 to 800 installed inside the case 800 are in close contact with each other.

3 and 4, the operation of the valve according to the present embodiment will be described.

3 illustrates a state in which no power is applied to the valve. In the state where power is not applied, the spool 200 descends by the elasticity of the spring 300 and connects the supply port 112 and the control port 114. Therefore, the oil conveyed from the main gallery (not shown) is transferred to the first operating space 132 supplied through the supply port 112, and is transferred to the oil jet gallery (not shown) through the control port 114.

On the other hand, when power is applied to the valve, the magnetic field generated in the coil 600 is guided by the holder 100 and the plate 800 to raise the plunger 400. Therefore, the spool 200 is brought into contact with the plunger 400 through the rod 240 and closes the supply port 112. Therefore, oil pumped from the main gallery (not shown) cannot be transferred to the oil jet gallery (not shown) (see FIG. 4).

5 illustrates an oil jet solenoid valve according to another embodiment of the present invention.

The valve according to the present embodiment includes a hollow holder 100, a spool 200 and a spring 300 installed in the first operating space 132 of the holder 100, and a second operating space of the holder 100. A plunger 400 movably installed at 134, a bobbin 500 coupled to the holder 100, a coil 600 wound around the outer circumferential surface of the bobbin 500, and a housing surrounding the bobbin 500. 700, a plate 800 coupled to the lower end of the holder 100, and a case 900 surrounding the circumference of the valve.

The rod 240 is installed between the spool 200 and the plunger 400 among the valves of the above-described configuration, and the rod 240 is manufactured in a form extending from the spool 200 unlike the above-described embodiment. That is, it extends from the bottom of the spool 200 and contacts the plunger 400.

The spool 200 described above has a structure formed integrally with the rod 240. Since the spool 200 and the rod 240 are disposed on the same axis, the spool 200 has a first operating space 132 and a second operating space 134. It can eliminate the working resistance caused by the moving oil. In particular, compared to the structure of the spool 200 (rod 240 press-fit structure) according to an embodiment has the advantage of easy processing of the spool 200.

6 illustrates an oil jet solenoid valve according to another embodiment of the present invention.

The rod 240 is installed between the spool 200 and the plunger 400 among the valves having the above-described configuration, and the rod 240 is manufactured in a form separate from the spool 200 unlike the above-described embodiments. That is, the rod 240 is installed to be movable in the connecting passage 136, the upper and lower ends are in contact with the spool 200 and the plunger 400, respectively.

As such, when the rod 240 is manufactured in a form separated from the spool 200, even if the center of the spool 200 and the rod 240 are slightly displaced, the rod 240 has no effect on the reciprocating motion of the spool 200. There is no concern, and precise manufacturing is not necessary when manufacturing the rod 240, thereby reducing manufacturing cost and manufacturing time.

While the present invention has been described through the preferred embodiments, the above-described embodiments are merely illustrative of the technical idea of the present invention, and various changes may be made without departing from the technical idea of the present invention. Those of ordinary skill will understand. Therefore, the protection scope of the present invention should be interpreted not by the specific embodiments, but by the matters described in the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims

A hollow holder formed of an upper body having a first operating space connecting the plurality of ports therein and a lower body extending downward from the upper body and having a second operating space formed therein;

A spool movably installed in the first operating space to connect or block the port;

A spring installed in the first operating space and elastically supporting the spool downward;

A plunger movably installed in the second operation space to move the spool;

A bobbin coupled to a circumference of the lower body and having a coil wound around its outer circumferential surface;

A plate positioned below the bobbin and into which a lower end of the lower body is inserted; And

An oil jet solenoid valve comprising a case surrounding the holder, the bobbin, the housing, and the plate.
The method according to claim 1,

The spool may include a large diameter portion in contact with an inner wall of the first operating space and a small diameter portion spaced apart from an inner wall of the first operating space.
The method according to claim 2,

An oil jet solenoid valve, characterized in that a flow passage connecting the upper and lower portions of the spool is formed in the spool.
The method according to claim 3,

A connecting passage is formed between the first operating space and the second operating space, the oil jet solenoid valve, characterized in that the rod is installed to be movable in the connecting passage.
The method according to claim 4,

And the rod has one end pressed into the spool and the other end in contact with the plunger.
The method according to claim 4,

The rod extends from the spool and contacts the plunger.
The method according to claim 4,

The rod is oil-jet solenoid valve, characterized in that both ends in contact with the spool and the plunger, respectively.
The method according to claim 4,

The connecting passage has a smaller diameter than the first operating space and the second operating space, and a cylindrical stopper is installed at a lower end of the connecting passage, and the stopper is lower than an upper surface of the second operating space. Oil jet solenoid valve, characterized in that protruding.
The method according to any one of claims 1 to 8,

The upper surface of the plate is provided with a mounting groove for inserting the lower end of the lower body, the lower end of the lower body oil jet solenoid valve, characterized in that spaced apart from the bottom of the mounting groove.