JP3024654B2 - Oil cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil cooler to which an oil filter can be connected.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. 62-5092
In this publication, a tankless type oil cooler mounted between a vehicle engine and an oil filter is described. The oil cooler includes a heat exchange unit that cools engine oil using engine cooling water, an oil filter side bracket connected between one end of the heat exchange unit and the oil filter, and a heat exchange unit. And a union having a bolt-shaped engaged portion that penetrates these and is engaged with a mounting tool.

The oil cooler is fixed to the mounting block of the engine by screwing the union to the mounting block of the engine while the bracket on the oil filter side is locked by the engaged portion formed on the union. I was

[0004] An oil passage for guiding engine oil in the heat exchange section to the oil filter is formed inside the oil filter side bracket. Also, a large recess is formed in the oil filter side bracket, and this recess prevents contact between the engaged portion formed in the union and the end face of the oil filter.

[0005] Further, inside the engine-side bracket, an oil passage for guiding engine oil in the engine to the heat exchange section, a cooling water introduction passage for guiding engine cooling water from the cooling water pipe into the heat exchange section, and an inside of the heat exchange section. A cooling water outlet passage for guiding the engine cooling water to the cooling water pipe was formed.

[0006]

However, in the conventional oil cooler, the cooling water introduction path and the cooling water extraction path are formed on the engine side, and the contact between the engaged portion and the end face of the oil filter is further reduced. A large recess to avoid was formed on the oil filter side. For this reason, the oil cooler of the tankless type needs to provide large brackets at both end portions of the heat exchange portion.

Therefore, the overall height of the oil cooler is increased. That is, since the amount of protrusion of the engine from the wall surface of the mounting block is increased, the installation space in the limited engine room is increased, and the mountability of the oil cooler on the vehicle is deteriorated. An object of the present invention is to provide an oil cooler with improved mountability on a vehicle.

[0008]

According to the present invention, a plurality of bulging portions projecting to one side are formed,
Further, the other sides of a pair of forming plates each having a communication hole formed in each of these bulging portions are joined together to form a joined body, and each of the bulging portions communicates in the stacking direction via the communication hole. As described above, by laminating a plurality of the joined bodies, a plurality of flow pipes in which the engine oil flows in the laminating direction of the joined bodies are respectively formed in parallel, between the adjacent joined bodies, A plurality of cooling water passages around which the plurality of cooling water passages are formed around the plurality of flow pipes, and a heat exchange unit having one end connected to the heat exchange unit and the other end connected to the oil filter; And an oil flow passage that guides the engine oil in the heat exchange section to the oil filter, a cooling water introduction path that guides the cooling water from the outside into the heat exchange section, and the cooling water in the heat exchange section. External cooling The technical means provided with a bracket having a lead-out path adopted.

(Claim 2) A tankless type oil cooler in which a housing is not provided around the heat exchanging section, and is mounted between an engine mounting block and an oil filter.

[0010]

According to the present invention, there are provided a plurality of flow passage pipes in which engine oil flows in the lamination direction of the joined body by merely laminating a plurality of joined bodies obtained by joining formed plates having the same shape. A laminated heat exchange unit having a plurality of cooling water passages through which the cooling water flows so as to go around the flow pipe is manufactured. Further, inside the bracket on the oil filter side, not only an oil flow path for guiding the engine oil to the oil filter, but also a cooling water introduction path and a cooling water discharge path for introducing and leading cooling water to and from the heat exchange unit are formed. Therefore, the bracket on the engine side in which the cooling water introduction passage and the cooling water outlet passage are formed becomes unnecessary.

As a result, the overall height of the oil cooler decreases.
That is, since the amount of protrusion of the oil cooler from the engine is reduced, the installation space of the oil cooler in the engine room is reduced.

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An oil cooler according to the present invention will be described with reference to an embodiment shown in FIGS. 1 and 2 are views showing an oil cooler.

The oil cooler 1 is installed in an engine room (not shown), and is mounted between the vehicle engine 2 and the oil filter 3. This oil cooler 1 is
A base plate 4 connected to the engine 2, a laminated heat exchange unit 5 for cooling engine oil using engine cooling water, and a bracket 9 connected to an end of the heat exchange unit 5 on the oil filter side. Have.

Further, the oil cooler 1 has a union 10
Connected to the engine 2 and the oil filter 3
Are connected. In this embodiment, a tankless type oil cooler 1 in which no housing is provided around the heat exchange unit 5 is used.

In the engine 2, an oil outflow passage 22 that guides engine oil lubricating each sliding portion (not shown) to the oil filter 3 through the oil cooler 1 is provided in a mounting block 21 of the oil cooler 1 and the oil filter 3. And an oil inflow passage 23 through which the engine oil filtered by the oil filter 3 is introduced through the union 10. An internal thread 24 for screwing the union 10 is formed on the inner wall surface of the oil inflow passage 23.

The oil filter 3 filters the engine oil, and is directly connected in the height direction of the oil cooler 1, that is, in the direction in which the oil cooler 1 protrudes from the mounting block 21.

The base plate 4 is made of, for example, a metal such as stainless steel and has an annular plate shape. An O-ring 41 is provided between the base plate 4 and the mounting block 21 of the engine 2 to prevent engine oil from leaking. The base plate 4 has a plurality of oil passages 42 communicating with the oil outflow passages 22 of the engine 2. Further, a circular insertion hole 43 through which the union 10 is inserted is formed in the inner periphery of the base plate 4.

The heat exchanging section 5 has a joint 51 of the same shape with a fin plate 7 sandwiched between a pair of forming plates 6.
Are laminated on the outer periphery of the tubular member 8,
A plurality of flow pipes 52 having different circumferential lengths are formed in the radial direction from the center. In addition, this heat exchange section 5
Is brazed together with the base plate 4 and the bracket 9 by a copper brazing material while being sandwiched between the base plate 4 and the bracket 9.

The plurality of flow pipes 52 are formed by connecting a plurality of flow passages 54 in the laminating direction, and an oil passage through which engine oil flows from the engine 2 toward the oil filter 3 is formed therein. ing.

The forming plate 6 is, as shown in FIG.
For example, it is made of a metal such as copper-plated stainless steel, has an annular shape, and is formed at two locations so as to face the protrusions 61 at the innermost peripheral edge. An annular first bulging portion 601 bulging to one side (upward in FIG. 4) is formed on the inner peripheral edge side of the forming plate 6.
A plurality of communication holes 621 are drilled in the upper surface of 1.

Further, on the outer periphery of the first bulging portion 601, second to fifth bulging portions 602 to 605 are sequentially formed so as to extend to the end face on the outer peripheral edge side of the forming plate 6. 2nd
The fifth bulging portions 602 to 605 are each composed of a plurality of convex portions arranged on the circumference, and each of the convex portions of the second bulging portion 602 has five communication holes 622, third and fourth communication holes. Bulge 60
3, 604, two communication holes 623, 624,
Three communication holes 625 are respectively formed in the fifth bulging portion 605. The third to fifth bulging portions 603 to 605
The circular communication port 65 through which the engine cooling water passes is formed at two places on the circumference of.

The other side of such a forming plate 6 is opposed to each other and joined by interposing a fin plate 7 between these forming plates 6 to form a joined body 51, and engine oil is formed by the facing convex portions. A plurality of inflow channel portions 54 are formed in parallel from the center in the radial direction.

The heat exchanging section 5 is provided with such a joint 5
1 are stacked so that the communication holes 621 to 625 coincide with each other, and the flow passages 54 communicate with each other through the communication holes 621 to 625 to form a plurality of flow pipes 52 extending in the stacking direction. A plurality of cooling water passages 53 through which engine cooling water flows are formed around the plurality of flow pipes 52 between adjacent joined bodies 51. In addition, the engine cooling water flows in the surface direction of the joined body 51 in the cooling water passage 53 formed around the plurality of flow pipes 52, and the engine oil flows in the flow pipe 52 and passes through the cooling water passage 53. The engine oil is cooled by heat exchange with the flowing engine cooling water.

As shown in FIG. 3, the fin plate 7 is made of, for example, a metal such as copper-plated stainless steel and has an annular shape, and functions as an inner fin in the flow path portion 54.
A protrusion 72 is provided at the same position as the protrusion 61 of the forming plate 6. The fin plate 7 is provided with communication hole groups 731 to 735 at positions facing the first to fifth bulging portions 601 to 605 of the forming plate 6 and communication holes 75 at positions corresponding to the communication openings 65 of the forming plate 6. Has been established.

The communication hole groups 731 to 735 are respectively formed from a plurality of communication holes arranged in the circumferential direction, and each communication hole is located between the communication holes 621 to 625 formed in the forming plate 6. As described above, the forming plate 6 and the fin plate 7 are assembled and joined.

The tubular member 8 is made of a metal such as stainless steel plated with copper and has an annular shape, and is fitted around the union 10. As shown in FIG.
As shown in (2), two groove portions 81 into which the projection portions 61 of the plurality of paired forming plates 6 and the projection portions 72 of the plurality of fin plates 7 are formed. These grooves 81 extend in the axial direction of the tubular member 8, that is, in the stacking direction of the joined body 51, and perform positioning of the pair of forming plates 6 and the plurality of fin plates 7 in the circumferential direction. The tubular member 8 is sandwiched between the base plate 4 and the bracket 9 and is joined to both by brazing with a copper brazing material. The union 10 is provided on the inner periphery of the tubular member 8.
Is formed in a circular insertion hole 82 through which the hole is inserted.

The bracket 9 is made of a metal such as stainless steel and has an annular shape, and is connected to the cooling water pipes 9a and 9b. As shown in FIGS. 4 and 5, an oil flow path 91 communicating with the plurality of flow pipes 52 of the heat exchange section 5, a cooling water pipe 9 a and the heat exchange section 5 are provided inside the bracket 9.
A cooling water introduction passage 92 communicating the cooling water passage 53 with the cooling water passage 53 and a cooling water outlet passage 93 communicating the cooling water passage 53 of the heat exchange unit 5 with the cooling water pipe 9b are formed. These oil flow path 91, cooling water introduction path 92 and cooling water outlet path 9
3 are each partitioned by a partition wall 94.

On the oil filter 3 side of the bracket 9, a connecting portion 95 for connecting the oil filter 3 and a circular recess 96 on the inner peripheral side of the connecting portion 95 are formed. The connection part 95 connects the oil filter 3 to the joined body 51.
Are flat to facilitate direct connection in the stacking direction. An O-ring 97 for preventing engine oil from leaking is provided between the flat surface of the connection portion 95 and the opposing surface of the oil filter 3. The recess 96 is provided for the oil filter 3.
In order to avoid contact between the opposed surface of the union 10 and the engaged portion 14 of the union 10, the connecting portion 95 has a shape that is greatly recessed from the end surface.

As shown in FIGS. 1 and 2, a circular groove 98 into which the end of the tubular member 8 on the oil filter 3 side is formed is formed on the heat exchange section 5 side of the bracket 9. A circular insertion hole 99 through which the union 10 is inserted is formed in the inner periphery of the bracket 9.

The union 10 is made of metal and has a tubular shape.
Insertion hole 43 of base plate 4, insertion hole 8 of tubular member 8
2 and fitted into the insertion hole 99 of the bracket 9,
The oil cooler 1 is arranged to penetrate. The union 10 has therein a communication passage 11 for communicating the oil filter 3 and the oil inflow passage 23 of the engine 2, and is formed on a mounting block 21 of the engine 2 on an outer periphery of an end of the engine 2 on the side of a screw 24. Male screw 1 to be screwed
2. The oil filter 3 is provided on the outer periphery of the end on the oil filter 3 side.
Male screw 13 for screwing in, and the concave portion 96 of the bracket 9
And has a bolt-shaped engaged portion 14 that abuts on the bottom portion.

In the oil cooler 1, the male screw 12 is screwed into the mounting block 21 by applying a rotational force to the engaged portion 14 with a mounting tool such as a wrench, so that the engaged portion 14
Are mounted and fixed on the mounting block by the force pressing the oil cooler 1 against the mounting block 21 side.

The operation of the oil cooler 1 will be described with reference to FIGS. The engine oil for lubricating the sliding portion of the engine 2 passes through an oil outflow passage 22 formed in the mounting block 21 and from a plurality of oil passages 42 formed in the base plate 4 as shown by solid arrows in FIG. It flows into the cooler 1.

On the other hand, the engine cooling water in the cooling water pipe 9a flows from the cooling water introduction passage 92 formed in the bracket 9 into the cooling water passage 53 of the oil cooler 1 as shown by a dashed arrow in FIG. It is guided around the plurality of flow pipes 52.

At this time, the engine oil is supplied to the heat exchanger 5
6 flows in the direction of lamination of the joined body 51 as indicated by the solid line arrow in FIG.
As shown by the dashed arrow in the figure, the oil flows around the engine oil, that is, outside the plurality of flow pipes 52 in a sewing manner. Therefore, when the engine oil passes through the inside of the heat exchange section 5, it exchanges heat with the engine cooling water and is cooled.

The cooled engine oil is supplied to the heat exchanger 5
And flows into the oil filter 3 through an oil flow passage 91 formed in the bracket 9 as shown by a solid arrow in FIG.

The engine oil that has flowed into the oil filter 3 is filtered in the oil filter 3 and then attached to the engine 2 through a communication path 11 formed in the union 10 as shown by a solid arrow in FIG. It is returned into the oil inflow passage 23 formed in the block 21 and guided to the oil pan or the sliding portion.

On the other hand, the engine cooling water heated by depriving the engine oil of heat passes through a cooling water outlet passage 93 formed in the bracket 9 through a cooling water pipe 9b as shown by a broken line arrow in FIG. After being cooled by (not shown), it is returned to the oil cooler 1 again.

As described above, in this embodiment, a plurality of oil flow paths 91, a cooling water introduction passage 92, and a cooling water outlet passage 93 are provided in the bracket 9 connecting the oil filter 3.
Is formed, it is no longer necessary to provide a large-sized engine-side bracket which was conventionally required for forming a passage for cooling water.

As a result, the overall height of the oil cooler 1 can be reduced. That is, the oil cooler 1 and the oil filter 3 are mounted on the wall of the mounting block 21 of the engine 2.
Can be reduced.

Therefore, the installation space for the oil cooler 1 and the oil filter 3 in the engine room can be reduced, so that the mountability of the oil cooler 1 and the oil filter 3 on the vehicle can be improved. Contact between the filter 3 and other engine accessories can be avoided.

Further, in this embodiment, the heat exchange section 5 can be constituted only by preparing a plurality of molding plates 6 and fin plates 7 having a fixed shape. Further, a joined body 51 having a fin plate 7 interposed between a pair of forming plates 6
Can be manufactured by laminating a plurality of heat exchange parts and further brazing integrally, so that the assemblability of the heat exchange part 5 during the manufacturing operation can be significantly improved.

(Modification) In this embodiment, a laminated heat exchange section is used as the heat exchange section, but another type such as a tube / fin type heat exchange section may be used.

Further, a recess may be formed in the mounting block of the engine and an oil cooler may be embedded in the recess to further reduce the amount of protrusion from the mounting block of the engine.

[0045]

According to the present invention, the amount of protrusion of the oil cooler from the engine can be reduced, so that the installation space for the oil cooler in the engine room can be reduced. As a result, the mountability of the oil cooler on the vehicle can be improved, and contact with other engine accessories can be avoided. Further, according to the present invention, since a plurality of flow pipes and cooling water passages can be formed by laminating a plurality of molding plates having the same shape, assemblability during a manufacturing operation can be improved.

[0046]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an oil cooler.

FIG. 2 is a sectional view showing an oil cooler.

FIG. 3 is a perspective view showing a main part of a heat exchange unit.

FIG. 4 is a plan view showing a bracket.

FIG. 5 is a sectional view showing a bracket.

FIG. 6 is a schematic diagram showing a flow direction of engine oil and engine cooling water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil cooler 2 Engine 3 Oil filter 5 Heat exchange part 9 Bracket 10 Union 14 Engagement part 51 Joined body 52 Flow pipe 53 Cooling water passage 54 Flow path part 91 Oil flow path 92 Cooling water introduction path 93 Cooling water discharge path 601 First bulge 602 Second bulge 603 Third bulge 604 Fourth bulge 605 Fifth bulge 621 Communication hole 622 Communication hole 623 Communication hole 624 Communication hole 625 Communication hole

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-128092 (JP, A) JP-A-61-144380 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28D 9/00 F28F 3/08 301

Claims (2)

(57) [Claims] (A) A plurality of bulging portions protruding to one side are formed.
And a communication hole is formed in each of these bulging portions.
Joined body by joining the other sides of a pair of molded plates
Are formed, and each of the bulging portions communicates in the stacking direction through the communication hole.
By laminating a plurality of the joined bodies as described above , the engine oil flows inside the joined body in the stacking direction of the joined bodies.
A plurality of flow pipes are respectively formed in parallel , between the adjacent joined bodies, and a plurality of flow pipes are formed.
Multiple cooling water passages around which cooling water flows were formed
A heat exchange portion of the layered, (b) one end connected to the heat exchanging portion, with the other end connected to the oil filter, the oil guiding the engine oil in the heat exchange section to said oil filter An oil cooler comprising: a flow passage; a cooling water introduction path for guiding the cooling water from the outside into the heat exchange unit; and a bracket having a cooling water discharge path for guiding the cooling water in the heat exchange unit to the outside. 2. A housing is provided around the heat exchange section.
Tankless oil cooler
Installed between the engine mounting block and the oil filter
Oil cooler according to claim 1, characterized in that it is kicked.