KR101734754B1 - Bypass module for oil cooler - Google Patents

Bypass module for oil cooler Download PDF

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Publication number
KR101734754B1
KR101734754B1 KR1020160031159A KR20160031159A KR101734754B1 KR 101734754 B1 KR101734754 B1 KR 101734754B1 KR 1020160031159 A KR1020160031159 A KR 1020160031159A KR 20160031159 A KR20160031159 A KR 20160031159A KR 101734754 B1 KR101734754 B1 KR 101734754B1
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KR
South Korea
Prior art keywords
oil
bypass
inlet
passage
outlet
Prior art date
Application number
KR1020160031159A
Other languages
Korean (ko)
Inventor
김인두
Original Assignee
현대자동차주식회사
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Publication date
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Priority to KR1020160031159A priority Critical patent/KR101734754B1/en
Application granted granted Critical
Publication of KR101734754B1 publication Critical patent/KR101734754B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/005—Controlling temperature of lubricant
    • F01M5/007—Thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F01M2005/004—Oil-cooled engines

Abstract

The present invention relates to a bypass module for an oil cooler, and more particularly, to a bypass module for an oil cooler capable of stably maintaining a circulating flow rate of oil by smoothly flowing the oil during a hot flow or a cold flow .
A bypass module for an oil cooler according to the present invention includes an oil inlet through which oil flows, an oil outlet through which oil is discharged, an inner oil passage allowing oil to flow toward the oil cooler, ; And a bypass valve installed in the housing for opening and closing the bypass passage.

Description

BYPASS MODULE FOR OIL COOLER FOR OIL COOLER

The present invention relates to a bypass module for an oil cooler, and more particularly, to a bypass module for an oil cooler capable of stably maintaining a circulating flow rate of oil by smoothly flowing the oil during a hot flow or a cold flow .

The engine of the vehicle is composed of a large number of components such as a cylinder block, a cylinder head, a piston, a crankshaft, a connecting rod, a cam, etc., Lubrication and cooling through oil supply etc. should be done.

In this way, the temperature of the oil can be raised to a high temperature during the cooling and lubrication process of the engine, and when the temperature of the oil is suddenly overheated, the viscosity of the oil is increased and proper lubrication can not be performed. An oil cooler is installed.

A bypass valve is provided in the oil cooler, and the bypass valve can be configured to selectively open and close a bypass pipe for bypassing the inlet of the oil cooler and the oil cooler depending on the temperature of the oil.

When the temperature of the oil is overheated, the bypass valve opens the bypass conduit so that the oil flows into the inlet of the oil cooler. After the superheated oil is appropriately cooled in the oil cooler, it circulates through the oil filter to the engine side (Hot flow of oil).

When the temperature of the oil is lower than the proper level, the bypass valve closes the bypass line so that the oil does not flow into the oil cooler. The oil then bypasses the oil cooler, (Cold flow of oil).

However, since the conventional bypass valve for the oil cooler is provided at the inlet side of the oil cooler, when the overheated oil passes through the oil cooler and circulates to the engine, the oil circulated to the engine due to the internal resistance of the oil cooler There is a disadvantage in that the flow can not be performed smoothly.

The present invention has been developed in order to overcome the disadvantages of the related art as described above, and it is an object of the present invention to provide an oil cooler which is capable of supplying superheated oil to an oil cooler, And it is an object of the present invention to provide a bypass module for an oil cooler which can smoothly flow the oil to be circulated directly to the engine side (bypass) without supplying it to the cooler side.

According to an aspect of the present invention, there is provided a bypass module for an oil cooler,

A housing having an oil inlet through which oil flows, an oil outlet through which oil is discharged, an inner oil passage allowing oil to flow to the oil cooler side, and a bypass passage communicating with the inner oil passage; And

And a bypass valve installed in the housing to open and close the bypass passage.

Wherein the internal flow path includes an inlet-side flow path communicating with the inlet of the oil cooler and an outlet-side flow path communicating with the outlet of the oil cooler.

One end of the inlet-side flow path communicates with the inlet of the oil cooler, the other end of the inlet-side flow path communicates with the oil inlet and the bypass flow path,

One end of the outlet-side flow path communicates with the outlet of the oil cooler, and the other end of the outlet-side flow path communicates with the oil discharge port and the bypass flow path.

And the oil discharge port is formed so as to branch off in the middle of the outlet-side oil passage.

One end of the bypass passage communicates with the inlet-side passage, the other end of the bypass passage communicates with the outlet-side passage,

And an installation space in which the bypass valve is installed is formed at the other end of the bypass passage.

The inner diameter of the installation space is formed to be larger than the inner diameter of the bypass passage, a step is formed at the other end of the bypass passage,

And the bypass valve has a blocking plate movable so as to be in contact with or spaced apart from the step.

According to another aspect of the present invention, there is provided a bypass module for an oil cooler,

An oil inlet port through which the oil flows, an oil outlet through which the oil is discharged, an inlet oil passage communicating with the oil inlet and the inlet of the oil cooler, an outlet oil passage communicating with the oil outlet and the outlet of the oil cooler, A housing having a bypass flow path connecting the inlet-side flow path and the outlet-side flow path; And

And a bypass valve for opening / closing the bypass passage according to the temperature of the oil,

One end of the bypass passage communicates with the inlet-side flow passage, the other end of the bypass passage communicates with the outlet-side flow passage, and the oil discharge port is formed to be communicable with the outlet-side flow passage.

The bypass valve includes a temperature sensing cylinder moving in response to the temperature of the oil, a guide for guiding movement of the temperature sensing cylinder, a cap for supporting the guide, an operating rod provided at the tip of the temperature sensing cylinder, And a barrier plate provided at the tip of the barrier plate.

The warming cylinder has a built-in wax that expands or shrinks according to the temperature of the oil.

The guide is configured to guide the movement of the thermosensitive cylinder, which is disposed inside the thermosensitive cylinder and moves by the expansion or contraction of the wax.

One end of the guide is inserted into the thermosensitive cylinder, and the other end of the guide is fixed to the cap.

And the operation rod is coupled to the tip of the thermosensitive cylinder so as to move in the same direction together with the thermosensitive cylinder.

A step is formed at the other end of the bypass flow path, and the blocking plate is configured to be in contact with the step of the bypass flow path by the movement of the operation rod, or to be separated from the step of the bypass flow path.

The bypass valve may further include a return spring for returning the temperature sensing cylinder to an original position when the wax is contracted due to the temperature drop of the oil.

According to one embodiment, the barrier plate is fixed to the tip of the actuating rod.

According to another embodiment, the barrier plate is installed so as to be resiliently supported by the elastic member at the tip of the operating rod.

According to the present invention, in the hot flow of oil circulated to the engine side after the superheated oil is supplied to the oil cooler side after being cooled to the appropriate temperature, the oil below the appropriate temperature is bypassed to the oil cooler side There is an advantage that the flow of oil can be smoothly performed in the case of cold flow of the oil circulated through the oil circulation path.

1 is a view illustrating a bypass module for an oil cooler according to an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion indicated by an arrow A in Fig. 1, and shows a state in which the bypass valve opens the bypass flow passage at the time of cold flow of oil.
3 is a view showing a state in which the bypass valve closes the bypass flow passage during the hot flow of the oil.
4 is a view showing a state in which the blocking plate is partially retracted when the pressure of the oil inlet of the housing during the hot flow of the oil is larger than the elastic force of the elastic member of the blocking plate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of convenience, the size, line thickness, and the like of the components shown in the drawings referenced in the description of the present invention may be exaggerated somewhat. The terms used in the description of the present invention are defined in consideration of the functions of the present invention, and thus may be changed depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of this term should be based on the contents of this specification as a whole.

1, the bypass module for an oil cooler according to various embodiments of the present invention includes a housing 10 installed on the oil cooler 20 side, and an oil cooler 20 installed in the housing 10 for oil to the oil cooler 20 side And a bypass valve 20 for controlling the flow of oil to supply or bypass the oil cooler 20.

The housing 10 may have an oil inlet 11 through which oil flows and an oil outlet 15 through which oil is discharged.

The housing 10 may be installed in close contact with the oil cooler 20. In particular, the oil cooler 20 may be provided with internal oil passages 12, 13, and 14 for allowing oil to flow therethrough . The internal flow paths 12, 13 and 14 are provided with an inlet-side flow passage 12 communicating with the oil inlet 11, an outlet-side flow passage 13 communicating with the oil discharge port 15, And a bypass flow path 14 connecting the outlet side flow path 13.

One end of the inlet side flow path 12 communicates with the inlet 22 of the oil cooler 20 and the other end of the inlet side flow path 12 can communicate with the oil inlet 11 and the bypass flow path 14 have.

One end of the outlet side flow passage 13 communicates with the outlet 23 of the oil cooler 20 and the other end of the outlet side flow passage 13 can communicate with the oil discharge port 15 and the bypass flow passage 14 have.

The oil inlet 11 and the oil outlet 15 can be connected to an oil filter (not shown) so that oil supplied from the outside can be introduced into the oil inlet 11 through an oil filter (not shown) The oil discharged through the discharge port 15 can be transferred to the oil filter (not shown) side again.

The oil inlet 11 may be formed at one side of the housing 10 to directly communicate with the other end of the inlet-side flow passage 12. The oil discharge port 15 is formed so as to branch off on the way of the outlet side oil passage 13 and the oil transferred through the outlet 23 of the oil cooler 20 or the bypass oil passage 14 flows through the outlet oil passage 13 And can be stably discharged to the oil discharge port 15.

1, the bypass flow path 14 selectively connects the other end of the inlet-side flow path 12 and the other end of the outlet-side flow path 13 in a communicable manner. One end of the bypass passage 14 communicates with the inlet side flow passage 12 and the other end of the bypass flow passage 14 communicates with the outlet side flow passage 13. [

An installation space 16 in which the bypass valve 30 can be installed may be formed at the other end of the bypass passage 14 (that is, the end communicating with the outlet passage 13) 30) can open or close the other end of the bypass passage 14 (that is, the end communicating with the outlet passage 13). Meanwhile, since the inner diameter of the installation space 16 is formed to be larger than the inner diameter of the bypass passage 14, the other end of the bypass passage 14 may have a step 17.

More specifically, when the bypass passage 14 is opened by the bypass valve 30, the other end of the inlet-side flow passage 12 and the other end of the outlet-side flow passage 13 are directly And flows to the oil outlet 15 through the bypass path 14 formed in a straight line with the oil inlet 11 (by bypassing the oil cooler 20) Cold flow of oil).

When the bypass flow passage 14 is closed by the bypass valve 30, the other end of the inlet-side flow passage 12 and the other end of the outlet-side flow passage 13 can be blocked from each other, The oil can flow to the oil outlet 15 after passing through the oil cooler 20 (hot flow of the oil).

Thus, the oil inlet 11, the bypass passage 14 and the bypass valve 30 can be arranged in a straight line, and the bypass valve 30 can be disposed in a state where the temperature of the oil is lower than the proper temperature When the bypass flow path 14 is opened by the bypass flow path 30, the cold flow of the oil can be performed more smoothly.

According to one embodiment, the housing 10 may be configured identically to an oil filter housing (not shown) to form part of an oil filter housing (not shown).

According to an alternative embodiment, the housing 10 may be of a structure that is separately manufactured for the oil filter housing (not shown) and detachably coupled to the oil filter housing (not shown).

According to various embodiments of the present invention, the bypass valve 30 includes a thermosensitive cylinder 31 that moves in response to the temperature of oil, a guide 32 that guides the movement of the thermosensitive cylinder 31, a guide 32 The operation rod 34 provided at the front end of the warming cylinder 31 and the blocking plate 36 provided at the front end of the operating rod 34. [

The warming cylinder 31 has a built-in wax 31a that expands or shrinks according to the temperature of the oil. When the temperature of the oil rises, the wax 31a expands, and the temperature sensing cylinder 31 can advance toward the bypass passage 14 as shown in Fig. When the temperature of the oil drops, the wax 31a shrinks, and the thermosensitive cylinder 31 can move backward in the direction away from the bypass flow path 14 as shown in FIG.

The guide 32 is disposed inside the thermosensitive cylinder 31 and can guide movement of the thermosensitive cylinder 31 which is moved by the expansion or contraction of the wax 31a.

One end of the guide 32 may be inserted into the thermosensitive cylinder 31 and the other end of the guide 32 may be fixed to the cap 33.

The cap 33 is installed to seal the other end of the housing 10 and the other end of the guide 32 is fixed to the cap 33 so that the guide 32 can be stably supported by the cap 33.

The operation rod 34 can be coupled to the tip of the temperature sensing cylinder 31 and can move in the same direction together with the temperature sensing cylinder 31. [

The blocking plate 36 may be provided at the front end of the operating rod 34. When the operating rod 34 advances with advancing the temperature sensing cylinder 31 as shown in Fig. The other end of the bypass flow passage 14 can be closed as it comes into contact with the step 17 of the flow passage 14. 3, when the operating rod 34 is moved backward with the backward movement of the temperature sensing cylinder 31, the bypass channel 14 is separated from the step 17 of the bypass channel 14, Can be opened.

The bypass valve 30 according to the various embodiments of the present invention may further include a return spring 31b for returning the temperature sensing cylinder 31 to the home position when the wax 31a contracts due to the lowering of the temperature of the oil .

The return spring 31b is provided on the outer surface of the thermosensitive cylinder 31 and both ends of the return spring 31b can be supported by the first retainer 31c and the second retainer 31d. The first retainer 31c can be fixed to the outer surface of one side of the thermosensitive cylinder 31 and the second retainer 31d can be fixed to the tip side of the cap 33. [ The first retainer 31c can move together with the thermosensitive cylinder 31 so that when the wax 31a in the thermosensitive cylinder 31 shrinks, the first retainer 31c thermally contacts the first retainer 31c by the elastic force of the return spring 31b, The cylinder 31 can be retracted and returned to the home position.

According to one embodiment, the blocking plate 36 can be fixedly installed at the tip of the operating rod 34, so that the blocking plate 36 moves in the same direction with the operating rod 34, 14 can be opened and closed.

1 to 4, the blocking plate 36 is installed so as to be elastically supported by the elastic member 35 at the front end of the operating rod 34, Can move at the tip of the operating rod (34).

4, the other end of the bypass passage 14 is closed by the blocking plate 36 during the hot flow of the oil, as the blocking plate 36 is resiliently supported by the elastic member 35 The elastic member 35 can be retracted rearward when the pressure on the side of the oil inlet 11 is larger than the elastic force of the elastic member 35 in the state Lt; / RTI > can be spaced apart by a finer spacing (s)

The operation of the present invention will be described with reference to FIGS. 2 to 4. FIG.

First, when the temperature of the oil is lower than the proper temperature, the wax 31a contracts and the thermosensitive cylinder 31 of the bypass valve 30 is reversed. As shown in FIG. 2, The bypass flow passage 14 can be opened by separating the plate 36 from the step 17 of the bypass flow passage 14. Therefore, the oil introduced through the oil inlet 11 can be discharged to the oil outlet 15 side through the bypass oil line 14 (cold flow of the oil) without flowing into the oil cooler 20 side. During the cold flow of the oil, the oil pressure may be lowered as the oil does not pass through the oil cooler 20, thereby reducing the driving force of the pump and improving the overall fuel economy.

When the temperature of the oil is overheated, the wax 31a expands and the warming cylinder 31 of the bypass valve 30 advances, and as shown in Fig. 3, The bypass passage 14 can be closed by the contact portion 36 contacting the step 17 of the bypass passage 14. [ The oil introduced through the oil inlet 11 flows into the inlet 22 of the oil cooler 20 and is properly cooled in the oil cooler 20 and then discharged to the outlet 23 of the oil cooler 20 And the oil discharged from the outlet 23 can be discharged to the oil discharge port 15 side (hot flow of the oil).

When the pressure on the side of the oil inlet 11 is larger than the elastic force of the elastic member 35 of the blocking plate 36 during the hot flow of the oil, the elastic member 35 can be retracted rearward, The oil that has flowed into the oil inlet 11 as well as the oil that has passed through the outlet 23 of the oil cooler 20 is separated by the minute gap s from the step 17 of the bypass flow path 14 And can be discharged to the oil outlet 15. Accordingly, by reducing the flow resistance in the oil cooler 20, the oil pressure can be reduced to reduce the driving force of the pump, thereby improving the fuel efficiency.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

10: housing 11: oil inlet
12: inlet-side flow path 13: outlet-
14: Bypass passage 15: Oil outlet
16: Installation space 20: Oil cooler
22: Oil cooler inlet 23: Oil cooler outlet
30: bypass valve 31: thermosensitive cylinder
31a: wax 31b: return spring
31c: first retainer 31d: second retainer
32: guide portion 33: cap
34: operating rod 35: elastic member
36: Blocking plate

Claims (15)

A housing having an oil inlet through which oil flows, an oil outlet through which oil is discharged, an inner oil passage allowing oil to flow to the oil cooler side, and a bypass passage communicating with the inner oil passage; And
And a bypass valve installed in the housing to open and close the bypass passage,
Wherein the oil inlet, the bypass passage, and the bypass valve are arranged in a straight line,
One end of the bypass passage communicates with the inlet-side passage, the other end of the bypass passage communicates with the outlet-side passage,
And an installation space in which a bypass valve is openably and closably formed at the other end of the bypass flow path. The method according to claim 1,
Wherein the internal flow path includes an inlet-side flow path communicating with an inlet of the oil cooler, and an outlet-side flow path communicating with an outlet of the oil cooler. The method of claim 2,
One end of the inlet-side flow path communicates with the inlet of the oil cooler, the other end of the inlet-side flow path communicates with the oil inlet and the bypass flow path,
Wherein one end of the outlet-side flow path communicates with the outlet of the oil cooler, and the other end of the outlet-side flow path communicates with the oil discharge port and the bypass flow path. The method of claim 3,
And the oil discharge port is formed to branch off in the middle of the outlet-side oil passage. delete The method according to claim 1,
The inner diameter of the installation space is formed to be larger than the inner diameter of the bypass passage, a step is formed at the other end of the bypass passage,
Wherein the bypass valve has a blocking plate movable so as to be in contact with or spaced from the step. An oil inlet port through which the oil flows, an oil outlet through which the oil is discharged, an inlet-side flow passage communicating with the oil inlet and the inlet of the oil cooler, an outlet-side flow passage communicating with the oil outlet and the outlet of the oil cooler, A housing having a bypass flow path connecting the inlet-side flow path and the outlet-side flow path; And
And a bypass valve for opening / closing the bypass passage according to the temperature of the oil,
One end of the bypass passage communicates with the inlet-side flow passage, the other end of the bypass passage communicates with the outlet-side flow passage, the oil discharge port is formed to be communicable with the outlet-
Wherein the oil inlet, the bypass passage, and the bypass valve are arranged in a straight line,
And an installation space in which a bypass valve is openably and closably formed at the other end of the bypass flow path. The method of claim 7,
The bypass valve includes a temperature sensing cylinder moving in response to the temperature of the oil, a guide for guiding movement of the temperature sensing cylinder, a cap for supporting the guide, an operating rod provided at the tip of the temperature sensing cylinder, And a blocking plate provided at the tip of the oil cooler. The method of claim 8,
Wherein the thermosensitive cylinder has a built-in wax for expanding or contracting according to the temperature of the oil. The method of claim 9,
Wherein the guide is configured to guide movement of the thermo-sensitive cylinder that is disposed inside the thermosensitive cylinder and moves by expansion or contraction of the wax. The method of claim 8,
Wherein the operating rod is coupled to the tip of the thermosensitive cylinder and configured to move in the same direction together with the thermosensitive cylinder. The method of claim 8,
And the blocking plate is configured to be in contact with a step of the bypass passage by a movement of the operating rod or to be spaced apart from a step of the bypass passage. Bypass module. The method of claim 9,
Wherein the bypass valve further comprises a return spring for returning the thermosensitive cylinder to an original position when the wax is contracted due to the temperature drop of the oil. The method of claim 8,
Wherein the blocking plate is fixed to a front end of the operating rod. The method of claim 8,
Wherein the blocking plate is installed to be resiliently supported by an elastic member at the tip of the operating rod.
KR1020160031159A 2016-03-15 2016-03-15 Bypass module for oil cooler KR101734754B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101501147B1 (en) 2014-03-19 2015-03-12 말레동현필터시스템 주식회사 Oil filter apparatus with multistage controlled thermostat valve module

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101501147B1 (en) 2014-03-19 2015-03-12 말레동현필터시스템 주식회사 Oil filter apparatus with multistage controlled thermostat valve module

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