JPH04356686A - Oil cooler - Google Patents

Abstract

PURPOSE:To improve the mounting performance of an oil cooler on a vehicle. CONSTITUTION:An oil cooler 1 comprises a base plate 4 which forms an oil flow passage 42, a heat exchanger part 5 for cooling engine oil with the aid of engine cooling water, and a bracket which forms an oil flow passage 91, a cooling water introduction passage 92, and a cooling water effluent passage 93. The amount of protrusion of the oil cooler 1 from a mounting block 21 of an engine 1 is reduced to minimize a mounting space of the oil cooler 1 onto an engine room.

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

[Prior Art] Conventionally, for example, Japanese Patent Application Laid-Open No. 62-5092
The publication describes a tankless type oil cooler installed between a vehicle engine and an oil filter. This oil cooler includes a heat exchange part that cools engine oil using engine cooling water, an oil filter side bracket connected between one end of this heat exchange part and an oil filter, and a heat exchange part. The engine-side bracket was connected between the other end of the engine and the engine mounting block, and the union had a bolt-shaped engaged portion that penetrated through these and was engaged with a mounting tool.

[0003]The oil cooler is fixed to the engine mounting block by screwing the union to the engine mounting block, with the oil filter side bracket being locked by the engaged portion formed on the union. was.

[0004] An oil flow path was formed inside the oil filter side bracket to guide the engine oil in the heat exchanger to the oil filter. Further, a large recess is formed in the oil filter side bracket, and this recess prevents the engaged portion formed in the union from coming into contact with the end face of the oil filter.

[0005] Furthermore, inside the engine side bracket, there is an oil flow path that leads the engine oil in the engine to the heat exchanger, a cooling water introduction path that leads the engine coolant from the cooling water piping into the heat exchanger, and an oil flow path that leads the engine oil in the engine to the heat exchanger. A cooling water outlet path was formed to guide the engine cooling water to the cooling water piping.

[0006]

However, in conventional oil coolers, the cooling water inlet passage and the cooling water outlet passage are formed on the engine side, and furthermore, the contact between the engaged portion and the end face of the oil filter is prevented. A large recess to avoid was formed on the oil filter side. For this reason, the tankless type oil cooler requires large brackets to be provided at both ends of the heat exchange section.

[0007] Therefore, the total height of the oil cooler increases. That is, since the amount of protrusion of the engine from the wall surface of the mounting block increases, the installation space in the limited engine room becomes large, making it difficult to mount the oil cooler on the vehicle. An object of the present invention is to provide an oil cooler that can be easily mounted on a vehicle.

[0008]

[Means to solve the problem]

(Claim 1) The present invention includes a heat exchange unit that cools the engine oil by exchanging heat between engine oil and cooling water;
One end is connected to the heat exchange section, and the other end is connected to the oil filter. A technical means is adopted that includes a bracket having a cooling water inlet passage leading into the exchange part and a cooling water outlet passage leading the cooling water in the heat exchange part to the outside.

(Claim 2) The heat exchange section is formed by forming a plurality of bulges projecting on one side, and connecting the other sides of a pair of molded plates each having a communicating hole formed in each of the bulges. are joined together to form a joined body, and by stacking a plurality of said joined bodies such that each of said bulges communicates in the stacking direction through said communication hole, a plurality of streams through which engine oil flows can be created. A plurality of cooling water passages through which cooling water flows are formed between the adjacent joined bodies and around the plurality of flow pipes.

0010

[Effect]

(Claim 1) The present invention provides, within the bracket on the oil filter side, not only an oil flow path that guides engine oil to the oil filter, but also a cooling water introduction path and a cooling water introduction path that introduces and leads out the cooling water to the heat exchange section. Since the outlet path is formed, there is no need for a bracket on the engine side that forms the cooling water introduction path and the cooling water outlet path.

As a result, the overall height of the oil cooler is reduced. That is, by reducing the amount of protrusion of the oil cooler from the engine, the installation space for the oil cooler in the engine room becomes smaller.

(Claim 2) By simply stacking a plurality of joined bodies in which molded plates of the same shape are joined, a plurality of passage pipes through which engine oil flows and cooling can be achieved by circulating around these passage pipes. A heat exchange section is manufactured with a plurality of cooling water passages through which water flows.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An oil cooler according to the present invention will be explained based on an embodiment shown in FIGS. 1 to 6. 1 and 2 are diagrams showing an oil cooler.

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

Furthermore, the oil cooler 1 includes a union 10
is connected to the engine 2 by the oil filter 3
are connected. Note that in this embodiment, a tankless type oil cooler 1 in which a housing is not provided around the heat exchange section 5 is used.

The engine 2 has an oil outflow passage 22 in the mounting block 21 of the oil cooler 1 and the oil filter 3 that leads engine oil that lubricates each sliding part (not shown) to the oil filter 3 via the oil cooler 1. , and an oil inflow passage 23 that introduces engine oil filtered by the oil filter 3 into the interior through the union 10. Furthermore, 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 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 metal such as stainless steel and has an annular plate shape, and is provided with an O-ring 41 between it and the mounting block 21 of the engine 2 to prevent leakage of engine oil. A plurality of oil passages 42 communicating with the oil outflow passage 22 of the engine 2 are formed in the base plate 4 . Further, a circular insertion hole 43 for inserting the union 10 is formed in the inner periphery of the base plate 4.

The heat exchange section 5 includes a joined body 51 having the same shape and having a fin plate 7 sandwiched between a pair of molded plates 6.
By laminating multiple layers around the outer periphery of the tubular member 8,
A plurality of channel pipes 52 having different lengths in the circumferential direction are formed radially from the center. Further, the heat exchange section 5 is sandwiched between the base plate 4 and the bracket 9, and is integrally brazed with the base plate 4 and the bracket 9 using a copper brazing material.

The plurality of flow path pipes 52 are formed by respectively arranging a plurality of flow path portions 54 in a stacked direction, and an oil passage through which engine oil flows from the engine 2 toward the oil filter 3 is formed inside. ing.

[0021] As shown in FIG. 3, the molding plate 6 is
For example, it is made of metal such as copper-plated stainless steel and has an annular shape, and protrusions 61 are formed at two opposing locations on the innermost periphery. A first bulging portion 601 having an annular shape bulging toward one side (upper side in FIG. 4) is formed on the end surface of the molded plate 6 on the inner peripheral edge side.
A plurality of communication holes 621 are bored in the upper surface of the device 1 .

Further, second to fifth bulges 602 to 605 are successively formed on the outer periphery of the first bulge 601 up to the end surface on the outer peripheral edge side of the molding plate 6 . 2nd ~
The fifth bulging portions 602 to 605 are each composed of a plurality of convex portions lined up on the circumference, and each convex portion of the second bulging portion 602 has five communicating holes 622, third and fourth holes. Swelling part 603
, 604 have two communication holes 623 and 624, and the fifth bulge 605 has three communication holes 625, respectively. Note that two circular communication ports 65 through which engine cooling water passes are formed on the circumferences of the third to fifth bulging portions 603 to 605 so as to face each other.

A joined body 51 is formed by joining the molded plates 6 with the other sides facing each other and interposing the fin plate 7 between the molded plates 6, and the opposing convex portions allow engine oil to flow through the molded plates 6. A plurality of inflow channel portions 54 are formed in parallel in a radial direction from the center.

[0024]The heat exchange section 5 is made of such a joined body 5.
1 are stacked so that the communication holes 621 to 625 match each other, and the flow path portions 54 communicate with each other through the communication holes 621 to 625, thereby forming a plurality of flow path pipes 52 extending in the stacking direction. A plurality of cooling water passages 53 through which engine cooling water flows are formed around a plurality of flow pipes 52 between adjacent joined bodies 51 . Note that the engine cooling water flows in the surface direction of the joint 51 in the cooling water passage 53 formed around the plurality of flow pipes 52, and the engine oil flowing inside the flow pipe 52 and the cooling water passage 53 flow together. The engine oil is cooled by exchanging heat with the flowing engine cooling water.

As shown in FIG. 3, the fin plate 7 is made of metal such as copper-plated stainless steel and has an annular shape. It has a protrusion 72 at the same position as 61. This fin plate 7 has communication hole groups 731 to 735 at positions facing the first to fifth bulges 601 to 605 of the molded plate 6, and a communication hole 6 of the molded plate 6.
A communication port 75 is bored at a position corresponding to 5.

The communication hole groups 731 to 735 are each formed from a plurality of communication holes arranged in the circumferential direction, and each communication hole is located between each of the communication holes 621 to 625 formed in the molded plate 6. In this manner, the molded plate 6 and the fin plate 7 are assembled and joined.

The tubular member 8 is made of metal such as copper-plated stainless steel, has an annular shape, and is fitted around the outer periphery of the union 10. On the outer periphery of this tubular member 8, as shown in FIG.
As shown in FIG. 2, two grooves 81 are formed into which the protrusions 61 of the plurality of pairs of molded plates 6 and the protrusions 72 of the plurality of fin plates 7 fit. 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 position the pair of molded plates 6 and the plurality of fin plates 7 in the circumferential direction. This tubular member 8 is sandwiched between the base plate 4 and the bracket 9, and is joined to both by brazing with copper brazing material or the like. Note that a union 10 is provided on the inner periphery of the tubular member 8.
A circular insertion hole 82 is formed for insertion of the.

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

Further, on the oil filter 3 side of the bracket 9, a connecting portion 95 for connecting the oil filter 3 is formed, and a circular recess 96 is formed on the inner peripheral side of this connecting portion 95. The connecting portion 95 connects the oil filter 3 to the joined body 51.
The surface is flat to facilitate direct connection in the stacking direction. An O-ring 97 is disposed between the flat surface of the connecting portion 95 and the opposing surface of the oil filter 3 to prevent leakage of engine oil. The recess 96 is the oil filter 3
In order to avoid contact between the facing surface of the union 10 and the engaged portion 14 of the union 10, the connecting portion 95 is largely recessed from the end surface thereof.

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

The union 10 is made of metal and has a circular tube shape.
Insertion hole 43 of base plate 4, insertion hole 8 of tubular member 8
2 and into the insertion hole 99 of the bracket 9,
It is arranged so as to penetrate the oil cooler 1. This union 10 has a communication passage 11 therein that communicates the oil filter 3 and the oil inflow passage 23 of the engine 2, and also has a female thread 24 formed on the outer periphery of the engine 2 side end on the mounting block 21 of the engine 2. Male screw 1 to be screwed together
2. Attach the oil filter 3 to the outer periphery of the oil filter 3 side end.
and the recess 96 of the bracket 9.
It has a bolt-shaped engaged portion 14 that comes into contact with the bottom portion of the holder.

In the oil cooler 1, the male thread 12 is screwed into the mounting block 21 by applying a rotational force to the engaged portion 14 using a mounting tool such as a spanner, and the engaged portion 14 is screwed into the mounting block 21.
is mounted and fixed on the mounting block by the force that presses the oil cooler 1 against the mounting block 21 side.

The operation of this oil cooler 1 will be explained based on FIGS. 1 and 6. The engine oil that lubricates the sliding parts of the engine 2 passes through the oil outflow passage 22 formed in the mounting block 21 and flows from a plurality of oil passages 42 formed in the base plate 4 in the direction indicated by the solid line arrow 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 indicated by the broken line arrow in FIG. It is guided around a plurality of flow pipes 52 .

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

The cooled engine oil is transferred to the heat exchange section 5
and flows into the oil filter 3 through an oil passage 91 formed in the bracket 9 as indicated by the solid line arrow in FIG.

After the engine oil that has flowed into the oil filter 3 is filtered in the oil filter 3, it passes through the communication passage 11 formed in the union 10 as indicated by the solid line arrow in FIG. The oil is returned to the oil inflow passage 23 formed in the block 21 and guided to the oil pan or sliding part.

On the other hand, the engine cooling water heated by removing the heat retained in the engine oil passes from the cooling water outlet passage 93 formed in the bracket 9 to the cooling water pipe 9b as indicated by the broken line arrow in FIG. (not shown) and then returned to the oil cooler 1 again.

As described above, in this embodiment, a plurality of oil passages 91, cooling water introduction passages 92, and cooling water outlet passages 93 are provided in the bracket 9 to which the oil filter 3 is connected.
Therefore, there is no need to provide a large bracket on the engine side, which was conventionally necessary to form a cooling water passage.

As a result, the total height of the oil cooler 1 can be reduced. That is, the oil cooler 1 and oil filter 3 are
The amount of protrusion can be reduced.

[0041] Therefore, the installation space for the oil cooler 1 and oil filter 3 in the engine room can be reduced, making it possible to improve the ease of mounting the oil cooler 1 and oil filter 3 on the vehicle. Contact between the filter 3 and other engine accessories can be avoided.

Furthermore, in this embodiment, the heat exchange section 5 can be constructed by simply preparing a plurality of molded plates 6 and fin plates 7 of a certain shape. Further, a joined body 51 in which a fin plate 7 is interposed between a pair of molded plates 6
Since the heat exchange section 5 can be manufactured by laminating a plurality of layers and further integrally brazing them, the assemblability during the manufacturing operation of the heat exchange section 5 can be significantly improved.

(Modification) In this embodiment, a laminated type heat exchanger is used as the heat exchanger, but other types such as a tube/fin type may be used as the heat exchanger.

Furthermore, the amount of protrusion of the engine from the mounting block may be further reduced by forming a recess in the engine mounting block and embedding the oil cooler in the recess.

[0045]

Effects of the Invention (Claim 1) According to the present invention, since the amount of protrusion of the oil cooler from the engine can be reduced, the installation space for the oil cooler in the engine room can be reduced. As a result, the ease with which the oil cooler can be mounted on a vehicle can be improved, and contact with other engine accessories can be avoided.

(Claim 2) According to the present invention, a plurality of flow pipes and cooling water passages can be formed by stacking a plurality of molded plates having the same shape, so that ease of assembly during manufacturing work can be improved.

[Brief explanation of 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 the main parts of the heat exchange section.

FIG. 4 is a plan view showing the bracket.

FIG. 5 is a sectional view showing the bracket.

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

[Explanation of symbols]

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

Claims (2)

[Claims] 1. (a) a heat exchange section that cools the engine oil by exchanging heat between engine oil and cooling water;
(b) an oil flow path having one end connected to the heat exchange section and the other end connected to the oil filter, and guiding the engine oil in the heat exchange section to the oil filter; An oil cooler comprising: a bracket having a cooling water inlet passage for guiding the cooling water into the heat exchanger, and a cooling water outlet passage for guiding the cooling water in the heat exchanger to the outside. 2. The heat exchange section is formed by joining the other sides of a pair of molded plates each having a plurality of bulges protruding from one side and each of these bulges having a communication hole formed therein. By stacking a plurality of bonded bodies such that each bulge communicates in the stacking direction through the communication hole, a plurality of flow path pipes through which engine oil flows can be formed. The oil according to claim 1, wherein a plurality of cooling water passages through which cooling water flows are formed between the adjacent joined bodies and around the plurality of flow pipes. Cooler.