JPH0811552A - Engine room cooling structure - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the cooling performance of the engine room while reducing the number of parts. In an engine room in which a radiator 5 is arranged in the front, a radiator tank 30 having a guide wall surface 33 for guiding the air passing through the radiator to the rear of the engine room is integrally provided on a side portion of the radiator 5, and the radiator tank 30 is provided. A radiator reservoir tank 38 was provided in the unit 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for an automobile engine room.

[0002]

2. Description of the Related Art In recent years, the volume of an engine room has been gradually reduced due to the requirements of vehicle design. In addition, the necessity for arranging a large number of various devices in the engine room has increased, and the space in the engine room has become smaller and smaller.

For this reason, liquid containers such as a washer tank, a power steering reservoir tank, and a radiator reservoir tank are often arranged collectively on the front side of the engine room.

When the liquid containers are collectively arranged on the front side of the engine room, the cooling air passing through the radiator is caught between the liquid containers collectively arranged,
It cannot pass back smoothly, resulting in cooling loss.

Therefore, in the cooling structure for the engine room disclosed in Japanese Utility Model Laid-Open No. 2-82627, the shape of the radiator reservoir tank 3 arranged on the front side of the engine room 1 is different from that shown in FIG. It is formed in such a shape as to surround auxiliaries and containers, and the outer surface 3a of the radiator reservoir tank 3 on the radiator 5 side is formed in a guide shape (flat plate shape) so as to extend rearward from the side portion of the radiator 5, The radiator cooling air is guided to the rear of the engine room 1.

According to this structure, the flow of the air passing through the radiator is improved, and the cooling performance of the engine room 1 is improved. In addition, E is an engine, 7 is a washer tank, and 9
Is a power steering reservoir tank, 11 is an auto cruise actuator, 13 is a front cross member,
Reference numeral 15 is a front fender apron.

In Japanese Utility Model Laid-Open No. 1-174518, as shown in FIGS. 8A and 8B, a reservoir tank 22 is provided integrally with the fan shroud 20 at the corner of the fan shroud 20 of the radiator 5. The structure is described. In this structure, the reservoir tank 22 and the radiator 5
The advantage is that the hose 26 connecting to the filler neck 24 can be shortened.

[0008]

By the way, in the conventional engine room cooling structure shown in FIG. 7, only the shape of the radiator reservoir tank 3 is changed, and the radiator reservoir tank 3 is provided separately from the radiator 5. However, there was no merit in reducing the number of parts. Further, although the cooling performance of the engine room can be improved, there is a problem that the radiator reservoir tank 3 has a complicated shape, resulting in high cost.

Further, in the conventional radiator structure shown in FIG. 8, since the radiator reservoir tank 22 is integrated with the fan shroud 20, there is an effect in reducing the number of parts, but the air passing through the radiator causes the radiator 5 to pass through. Since there is no improvement in the point of being caught in the liquid containers on the side of, there was a possibility that it would not contribute much to the improvement of the cooling performance of the engine room.

In view of the above circumstances, it is an object of the present invention to provide an engine room cooling structure capable of improving the cooling performance of the engine room while reducing the number of parts.

[0011]

According to a first aspect of the present invention, there is provided an engine room in which an engine is laterally arranged so that an exhaust manifold is located in front of a front-rear direction of a vehicle body, and a radiator is arranged in front of the engine. A radiator reservoir tank is integrally provided to guide the passing air of the radiator.

According to a second aspect of the present invention, the engine is laterally placed so that the exhaust manifold is located forward in the front-rear direction of the vehicle body.
In an engine room in which a radiator is arranged in front of the engine, a radiator tank of the radiator is
In the vicinity of the cooling water inlet of the radiator, the radiator tank is enlarged and formed in the engine side direction and the downward direction.
It is characterized in that a radiator reservoir tank is integrally provided to guide the passing air of the radiator.

According to a third aspect of the present invention, in the engine room cooling structure according to the second aspect, the radiator tank is provided with a guide wall surface for guiding the air passing through the radiator to the lower rear of the engine room.

According to a fourth aspect of the present invention, there is provided the cooling structure for an engine room according to the second or third aspect, wherein a partition wall is provided in the radiator tank to divide an internal space of the radiator tank into two, and one of The space is used as the radiator reservoir tank, and the other space is used as an engine cooling water passage.

According to a fifth aspect of the present invention, in the engine room cooling structure according to the fourth aspect, the engine cooling water passage is disposed on the guide wall surface side, and the engine cooling water passage is formed on the guide wall surface and the radiator reservoir. It is characterized by being folded back along the tank.

[0016]

According to the invention of claim 1, the radiator reservoir tank can be handled integrally with the radiator. Further, the radiator reservoir tank can directly or indirectly guide the passing air of the radiator, and the cooling performance can be controlled.

According to the second aspect of the present invention, the radiator tank is integrally provided with the radiator reservoir tank, and the radiator and the radiator reservoir tank can be integrally handled. Further, the radiator tank can guide the air passing through the radiator in the downward direction on the engine side.

According to the third aspect of the invention, in addition to the operation of the second aspect of the invention, the radiator passing wind can be reliably guided to the lower rear of the engine room by the guide wall surface.

According to the invention of claim 4, in addition to the operation of the invention of claim 2 or 3, the inside of the radiator tank is partitioned by a partition wall, one of which serves as a radiator reservoir tank, and the other of which serves as an engine cooling water passage. The cooling water passing through the cooling water passage and the auxiliary cooling water in the radiator reservoir tank are in contact with each other via the partition wall, whereby the engine cooling water is cooled by the auxiliary cooling water in the reservoir tank.

According to the invention of claim 5, in addition to the operation of the invention of claim 4, since the engine cooling water passage is formed in a U shape, the contact between the engine cooling water and the auxiliary cooling water through the partition wall. The time becomes longer, and the cooling effect of the engine cooling water increases accordingly. Further, since the engine cooling water passage is on the guide wall surface side, the engine cooling water is cooled by the air passing through the radiator through the guide wall surface. Therefore, the cooling performance of the engine cooling water is further increased.

[0021]

An embodiment of the present invention will be described below with reference to the drawings.

The vehicle of this embodiment is a horizontal engine F
As shown in FIG. 5, the engine E is arranged in the center, the exhaust manifold 61 is arranged in front of the engine E, and the intake manifold 63 is arranged in the rear in the engine room 1 as shown in FIG. A radiator 5 is arranged further in front of. In addition, a power steering reservoir tank 65 and the like are arranged on the side of the engine E.

The feature of the embodiment of the present invention is that the radiator 5
The radiator tank 30 is integrally provided on one side portion of the.

FIG. 1 is a perspective view of the radiator tank 30, FIG. 2 is a plan view seen from above, FIG. 3 is a front view seen from the engine E side, and FIG. 4 is a view showing the internal structure of the radiator tank 30.

The radiator tank 30 (upper tank) is an engine cooling water inlet of the radiator 5 (described later).
It is integrally formed on the side portion on the side, is enlarged in the engine E side direction and downward, and is made of the same material as the radiator 5. If the radiator tanks are arranged on the left and right sides, they will be enlarged to the engine side as they are. When viewed from the engine side, the radiator tank 30 is configured as an inverted L-shaped container, and has a rectangular parallelepiped vertical elongated portion 32 and a flat box-shaped horizontal elongated portion 3 at the upper end thereof.
4 and.

When the center side of the radiator 5 is the inside, the vertically long portion 32 is located outside and the horizontally long portion 34 is located inside. The vertically long portion 32 and the horizontally long portion 34 are the radiator 5
Is formed so as to project from the side portion of the radiator to the engine side, and the vertically long portion 32 is set to have the same height as the side portion dimension of the radiator 5.

Here, in order to facilitate understanding of the directionality, the front-rear direction of the vehicle body is represented as the X direction, and the left-right direction of the vehicle body is represented as the Y direction.

Width in the X direction of the vertically long portion 32 (width in the longitudinal direction of the vehicle body)
Is formed to be wider than the width of the horizontally long portion 34 in the X direction.
The transition portion from 4 to the vertically long portion 32 is formed by a smoothly continuous wall surface. In particular, the outer wall surface corresponding to the inner surface of the inverted L-shaped radiator tank 30 is formed by a smoothly curved curved surface, and this surface serves as the guide wall surface 33. The guide wall surface 33 is configured as a surface parallel to the X direction, and has a function of guiding the air passing through the radiator in a straight flow toward the rear of the engine room.

Inside the vertically long portion 32 of the radiator tank 30, a vertically extending first partition wall 36 is provided. The first partition wall 36 is arranged in a direction orthogonal to the Y direction, and the first partition wall 36 partitions the internal space of the vertically long portion 32 into an outer space and an inner space. The outer space is a completely independent space and serves as a radiator reservoir tank 38. Auxiliary cooling water 40 is poured into the radiator reservoir tank 38.

The inner space is integrated with the inner space of the horizontally long portion 34 and serves as an engine cooling water passage 42. The space as the engine cooling water passage 42 is further separated by a second partition wall 44 provided vertically inside thereof.
It is divided into two spaces 42a and 42b. The second partition wall 44 is arranged substantially in the middle of the radiator tank 30 in the X direction, and is arranged in a direction orthogonal to the X direction.
The two spaces 42a and 42b are located side by side in the X direction. These two spaces 42a and 42b are connected by a communication hole 46 formed in the lower portion of the second partition wall 44, and form a U-shaped passage in the plane along the X direction. It should be noted that the passage 42 is not limited to the U-shape, and the folding back can be further increased.

In this way, the engine cooling water passage 42 formed in a U shape (folded back) along the guide wall surface 33 and the radiator reservoir tank 38 is adjacent to the inner guide wall surface 33, and the radiator reservoir tank 38 is It is located outside. A cooling water inlet 48 for connecting to the cooling water passage on the engine E side is provided at the upper end of the engine cooling water passage 42 on the space 42a side, and the space 42b is provided.
A connection portion 50 to the radiator 5 side is provided at the upper end of the side. Further, the filler neck portion of the radiator 5 to which the cap 52 is attached and the lower end of the radiator reservoir tank 38 are connected by an overflow cooling water passage 54 integrated with the radiator tank 30. Reference numeral 56 is an inlet cap of the radiator reservoir tank 38.

Next, the operation will be described.

As shown in FIG. 4, when the engine cooling water enters the radiator tank 30 through the connection port 48 as shown by an arrow, a space 42a on the front side of the engine cooling water passage 42 is formed.
Through the communication hole 46, enter the space 42b at the back, flow upward in the space 42b, and flow into the radiator 5.

During this time, the engine cooling water flows next to the radiator reservoir tank 38, and the cooling water passing through the engine cooling water passage 42 and the auxiliary cooling water in the radiator reservoir tank 38 pass through the first partition wall 36. Contact
The engine cooling water is the auxiliary cooling water 4 in the reservoir tank 38.
It is cooled by 0.

Further, since the engine cooling water passage 42 is on the guide wall surface 33 side, the engine cooling water is cooled by the radiator passing air through the guide wall surface 33. Particularly, since the engine cooling water passage 42 is formed in a U shape,
The contact time between the engine cooling water and the auxiliary cooling water via the first partition wall 36 becomes longer, and the cooling action of the engine cooling water increases accordingly. Similarly, since the contact time with the radiator passing air through the guide wall surface 33 also becomes longer, the cooling action of the engine cooling water is increased accordingly.

Further, the radiator passing air is guided straight to the rear of the engine room 1 by the guiding action of the guide wall surface 33 of the radiator tank 30, as shown by the arrow in FIG. Therefore, after passing through the high temperature portion around the exhaust manifold 61, it is mainly discharged in the underfloor direction of the engine room 1. Therefore, engine room 1 with cooling air
The cooling loss inside the engine room 1 is reduced, and the cooling performance inside the engine room 1 is improved.

In this respect, when the radiator tank 30 is not provided, as shown by the arrow in FIG. 6, after the radiator passing air has passed through the high temperature portion around the exhaust manifold 61,
It flows to the side of the engine E and raises the temperature of parts around the engine such as the power steering reservoir tank 65. Therefore, by providing the radiator tank 30, the cooling efficiency is higher than that when it is not provided.

Further, in this embodiment, since the height of the radiator tank 30 is set to be the same as the vertical dimension of the side portion of the radiator 5, the guiding action can be surely obtained.

Further, since the radiator reservoir tank 38 is provided integrally with the radiator 5, it is easy to handle and the hose connecting the reservoir tank 38 and the radiator 5 is not necessary.

A washer tank may be integrally provided next to the radiator reservoir tank 38 of the above embodiment. In such a case, the number of parts can be further reduced.

Further, the position where the radiator reservoir tank 38 is formed is not limited to the above embodiment, and may be provided anywhere. For example, it may be provided at the bottom of the radiator tank 30.

[0042]

As described above, according to the first aspect of the present invention, since the air passing through the radiator can be guided, the cooling performance in the engine room is improved. Further, since the radiator reservoir tank is integrated with the radiator, the radiator reservoir tank itself and parts such as its mounting brackets can be reduced, handling becomes easier, and the flexibility of layout of the radiator reservoir tank increases.

According to the invention of claim 2, the radiator reservoir tank can be handled integrally with the radiator through the radiator tank, and the same effect as the invention of claim 1 can be obtained.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the invention, a reliable guiding action is obtained, and cooling air can be trapped between the equipment and the liquid container on the side of the radiator. The cooling loss is reduced and the cooling performance of the engine room is improved.

According to the invention of claim 4, claim 2 or 3
In addition to the effect of the invention described above, since the radiator reservoir tank is filled with auxiliary cooling water having a temperature lower than that of the engine cooling water, the engine cooling water flowing in the radiator tank is cooled by the auxiliary cooling water, and the engine cooling water is cooled. The water cooling performance increases, and the radiator can be downsized accordingly. Further, since the engine cooling water and the reservoir tank are divided only by providing the partition wall, the structure of the radiator tank is simple.

According to the fifth aspect of the present invention, the cooling performance of the engine cooling water is further enhanced, so that the radiator can be made more compact accordingly.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of the present invention.

FIG. 2 is a plan view of an essential part of an embodiment of the present invention.

FIG. 3 is a front view of a main part of one embodiment of the present invention viewed from the engine side.

FIG. 4 is a perspective view showing an internal structure of a main part of one embodiment of the present invention.

FIG. 5 is a plan view of an engine room used for explaining effects of one embodiment of the present invention.

FIG. 6 is a plan view of an engine room showing a flow of cooling air when the embodiment of the present invention is not applied.

FIG. 7 is a plan view of a conventional example.

FIG. 8 is an explanatory view of another conventional example, (a) is a front view,
(B) is a side view.

[Explanation of symbols]

 1 Engine room 5 Radiator 30 Radiator tank 33 Guide wall surface 36 Partition wall 38 Radiator reservoir tank 42 Engine cooling water passage 48 Connection port to engine side 50 Connection part to radiator side

Claims (5)

[Claims] 1. An engine room in which an engine is laterally placed such that an exhaust manifold is located forward in the front-rear direction of a vehicle body, and a radiator is arranged in front of the engine, and a radiator reservoir tank is integrally provided in the radiator, A cooling structure for the engine room, which guides the passing wind of the engine. 2. An engine room in which an engine is laterally placed such that an exhaust manifold is located forward in the front-rear direction of a vehicle body, and a radiator is arranged in front of the engine, wherein a radiator tank of the radiator is connected to a cooling water inlet of the radiator. A cooling structure for an engine room, which is enlarged in the vicinity of the engine and in the vicinity of the engine in the vicinity, and a radiator reservoir tank is integrally provided in the radiator tank to guide the air passing through the radiator. 3. The engine room cooling structure according to claim 2, wherein the radiator tank is provided with a guide wall surface that guides the air passing through the radiator rearward of the lower part of the engine room. 4. The cooling structure for an engine room according to claim 2, wherein a partition wall is provided in the radiator tank to divide an internal space of the radiator tank into two, and one space is the radiator reservoir. A cooling structure for an engine room, characterized by using a tank and the other space as an engine cooling water passage. 5. The engine room cooling structure according to claim 4, wherein the engine cooling water passage is disposed on the guide wall surface side, and the engine cooling water passage is folded back along the guide wall surface and a radiator reservoir tank. A cooling structure for the engine room, which is characterized by being formed.