JP3100789B2 - Arrangement structure of 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 provided in a vehicle.

[0002]

2. Description of the Related Art Generally, in a vehicle of the FF type or the like, a radiator is arranged in a front row in an engine room, and an engine and a transmission are arranged behind the radiator. An oil cooler for cooling engine oil and the like is disposed below the radiator (Japanese Utility Model Laid-Open No. 57-15). Incidentally, in recent vehicles, an under cover may be provided so as to cover a lower portion from the front end of the vehicle body, that is, the front side of the radiator, in order to reduce aerodynamic resistance.

[0003]

However, when the oil cooler is arranged below the radiator as in the above-mentioned conventional art, the radiator is arranged above the radiator, the height of the hood is increased, the aerodynamic resistance of the vehicle is reduced, and the exterior is reduced. There was a problem that it did not contribute to the ease of design.

Therefore, in order to solve such a problem, an oil cooler is disposed on the side of the radiator as disclosed in the above-mentioned publication or an oil cooler is disposed on the lower front of the radiator. Proposed. However, in the former case, the width of the radiator must be reduced by an amount corresponding to the space in which the oil cooler is arranged due to the limitation on the width of the vehicle. In the latter case, the front bumper, the oil cooler, and the radiator are arranged close to each other in order from the front side of the vehicle body. May come into contact with each other.

[0005] The present invention has been made in view of the above points, and an object of the present invention is, in particular, in the case of a vehicle having an under cover, between the radiator and the oil pan of the engine above the under cover. By paying attention to the so-called dead space, this dead space is used as the space for the oil cooler, so that the cooling performance of the radiator and oil cooler is not impaired, It is an object of the present invention to provide an oil cooler arrangement structure capable of effectively reducing the height.

[0006]

According to a first aspect of the present invention, an engine having an oil pan at a lower portion is disposed at a rear portion of a radiator in an engine room. In a vehicle provided with an undercover provided so as to cover a lower portion thereof, an opening is provided in the undercover to guide running wind to a rear of the radiator in an engine room, and an oil pan of the engine is provided behind the opening. Position. The oil pan is formed with an inclined surface that is inclined downward toward the rear, and an oil cooler is arranged in a space between the opening and the inclined surface.

The invention according to claim 2 is dependent on the invention according to claim 1, wherein the oil cooler is mounted on a cross member extending between left and right frames extending in the front-rear direction on both right and left sides of the vehicle body. In addition to being arranged in the vehicle width direction along the member, a bar-shaped component extending in the vehicle width direction in parallel with the oil cooler is arranged at least between the oil cooler and the opening.

According to a third aspect of the present invention, there is provided the method according to the second aspect, wherein the rod-shaped part is constituted by an oil pipe connected to an oil cooler.

The invention according to claim 4 is dependent on the invention according to claim 2, wherein the steering device is supported near the connecting portion between the frame and the cross member, and these members are attached to the frame or the cross member. Vibration reduction means for reducing vibration transmitted to the steering device via the above is provided.

According to a fifth aspect of the present invention, in accordance with the fourth aspect of the present invention, the vibration is reduced by a dynamic damper having the oil cooler as a mass by attaching the oil cooler to a cross member via an elastic body. Configure means.

[0011]

According to the above-mentioned structure, according to the first aspect of the present invention,
When the vehicle is traveling, traveling wind is introduced from the opening of the under cover to the rear of the radiator in the engine room, passes through the oil cooler, and flows down the rear of the engine along the inclined surface of the oil pan of the engine and below the engine. . As a result, the oil cooler is sufficiently cooled, that is, air-cooled by the traveling wind. In addition, since the oil cooler is arranged in a dead space surrounded by the radiator, the oil pan of the engine and the under cover, it is not necessary to move the radiator upward by this arrangement, and the size of the radiator is reduced. There is no restriction. Further, since a relatively large space is secured between the radiator and the front bumper, the two do not come into contact with each other when a relatively gentle collision force acts on the front bumper.

According to the second aspect of the present invention, since the oil cooler is disposed on the cross member, the oil cooler can be easily attached. In addition, the cross member and the rod-shaped parts prevent the stepping stone from hitting the oil cooler.

According to the third aspect of the present invention, since the rod-shaped part is an oil pipe, collision of a stepping stone against the oil cooler can be prevented by using existing parts.
In addition, the oil pipe is cooled by the traveling wind guided from the opening of the under cover, and it is possible to contribute to the improvement of oil cooling.

According to the fourth aspect of the present invention, the vibration transmitted to the steering device via the fromm and the cross member is reduced by the vibration reducing means.

According to the fifth aspect of the present invention, the vibration can be reduced by a dynamic damper having the oil cooler as a mass by a simple structure in which the oil cooler is simply attached to the cross member via a rubber bush. Means can be configured.

[0016]

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

FIGS. 1 to 3 show the arrangement of parts in an engine room of a four-wheel drive vehicle having an oil cooler arrangement structure according to an embodiment of the present invention, and FIGS. 4 and 5 show a frame structure of the vehicle. Is shown.

4 and 5, reference numerals 1L and 1R denote a pair of left and right frames extending in the front-rear direction on both left and right sides of the vehicle body. The two frames 1L and 1R extend in a vehicle width direction (5 in FIG. 4). ) Are connected to each other by cross members 2-6. Among these cross members 2 to 6, the central portion in the longitudinal direction (that is, the vehicle width direction) of the second cross member 3 from the front side is one step lower than the left and right end portions which are the connection portions with the frames 1L and 1R. I have. A gear box 12 of a steering device 11 is provided with a bracket 13 at a connecting portion between the left frame 1L and the cross member 3.
Mounted through. Reference numeral 16 denotes an exhaust pipe of the engine. The exhaust pipe 16 is disposed inside the vehicle body of the right frame 1R so as to extend in the front-rear direction of the vehicle along the frame 1R. Each of the rear cross members 5 and 6 is supported via a rubber bush (not shown), and a catalyst converter 17 and a muffler 18 are provided in the exhaust pipe 16.

On the other hand, in FIGS. 1 to 3, reference numeral 21 denotes a dash panel for separating an engine room 22 and a vehicle compartment 23; 24, a radiator with a fan disposed in the front of the engine room 22; The engine 25 has an oil pan 26 at its lower part, and a pair of left and right banks 27a, 27 at its upper part.
b is a 6-cylinder V-type engine. Engine 2 above
5, a transmission 28 is disposed vertically in the same manner as the engine 25.
On the left side of the oil pan 26, a front differential 29 is arranged. The engine output shifted by the transmission 28 is transmitted from a center differential (not shown) to the rear wheels via a propeller shaft, and transmitted from the center differential to the front differential 29. Each is transmitted to the left and right front wheels via the drive shaft 30.

Each bank 27a, 27 of the engine 25
Exhaust manifolds 31 and 32 communicating with the cylinders in the bank are attached to b. The exhaust manifold 31 on the left bank side is a communication pipe 3 that extends between the engine 25 and the dash panel 21 in the vehicle width direction.
The exhaust manifold 32 on the right bank side communicates with the exhaust manifold 32 on the right bank side through the exhaust pipe 16 at a position downstream of the junction with the communication pipe 33.
It is connected to the.

An under cover 36 is provided so as to cover the radiator 24 from the front side to below the radiator 24. The under cover 36 has an opening for guiding the traveling wind to the rear of the radiator 24 in the engine room 22. The opening 37 is formed to be long in the vehicle width direction, and has a guide surface 37a bulging into the engine room 22 for guiding the traveling wind around the periphery. The oil pan 26 of the engine 25 is located behind the opening 37, and a front surface of the oil pan 26 is formed with an inclined surface 38 which is inclined downward toward the rear.

The second cross member 3 is located between the opening 37 and the inclined surface 38. On the cross member 3, oil extending in the vehicle width direction along the cross member 3 is provided. A cooler 40 is arranged. A mounting plate 41 is provided on the lower surface of the oil cooler 40. The mounting plate 41 has four protrusions 41a, 41a.
, and each protruding portion 41a is mounted on an angle member 42 fixed to the cross member 3 via a rubber bush 43. Therefore, the oil cooler 40
Are four rubber bushes 43,
43,... Are elastically supported by
A dynamic damper 44 having the oil cooler 40 as a mass is configured.
Has a function as a vibration reducing unit that reduces vibration transmitted to the steering device 11 via the from 1L, 1R and the cross member 3.

Further, between the oil cooler 40 and the opening 37, an oil pipe 46 and a stabilizer 47 of a suspension device are arranged as rod-shaped components extending in the vehicle width direction in parallel with the oil cooler 40. , The oil cooler 40 and the inclined surface 38
Between them, the linkage member 13 of the steering device 11 is disposed as a rod-shaped component extending in the vehicle width direction in parallel with the oil cooler 40. The above oil pipe 4
6 is connected to the oil cooler 40 and is attached to the cross member 3 via a hook member (not shown).

In FIG. 1 to FIG. 3, reference numeral 51 denotes a stator arranged close to the right wall surface of the engine 25, and a front differential 29 is provided on the right wall surface side of the engine 25 where the stator 51 is disposed. Compared with the left wall side of the engine 25 to be disposed, the under cover 36
The running wind guided into the engine room 22 from the opening 37 is easy to flow.

Next, the operation and effect of the above embodiment will be described. During traveling of the vehicle, traveling wind is introduced from the opening 37 of the under cover 36 to the rear of the radiator 24 in the engine room 22 and Pass through the oil cooler 40. After that, most of the traveling wind flows downward along the inclined surface 38 of the oil pan 26 of the engine 25, passes below the engine 25, and partially flows on the side of the engine 25, particularly on the right side. Flow down.
As a result, the oil cooler 40 is sufficiently cooled by the traveling wind, and the cooling performance of the oil cooler 40 can be improved.

In addition, since the oil cooler 40 is disposed in a dead space surrounded by the radiator 24, the oil pan 26 of the engine 25, and the under cover 36, it is necessary to move the radiator 24 upward by this arrangement. And the size of the radiator 24 is not limited. For this reason, the hood height can be reduced while ensuring the cooling performance of the radiator 24. Further, when the oil cooler 40 is disposed between the radiator 24 and the front bumper and a relatively gentle impact force acts on the front bumper, these components do not come into contact with each other, and the radiator 24 and the oil cooler 40 do not contact each other. Can be prevented.

Further, in this embodiment, the oil cooler 40 can be easily mounted by arranging the oil cooler 40 on the cross member 3, and the cross member 3 and the oil cooler 40 can be easily mounted.
Stabilizer 4 as rod-shaped parts arranged on both sides of
7. The stepping stones can be prevented from hitting the oil cooler 40 by the oil pipe 46 and the linkage member 13. In particular, since the oil pipe 46 is disposed between the oil cooler 40 and the opening 37 of the under cover 36, the traveling wind guided from the opening 37 allows the oil cooler 40 or the oil flowing therethrough to flow. The cooling can be performed, and the cooling performance of the oil cooler 40 can be further improved.

In addition, the oil cooler 40 is elastically supported by the cross member 3 via a rubber bush 43, and a dynamic damper 44 having the oil cooler 40 as a mass is configured. The dynamic damper 44 exerts a vibration reducing function against vibration transmitted to the steering device 11 via the frames 1L and 1R and the cross member 3 from a vehicle or a suspension system, and the vibration can be reduced.

[0029]

As described above, according to the arrangement structure of the oil cooler of the present invention, the oil cooler is arranged in a dead space surrounded by the radiator, the oil pan of the engine, and the under cover, and the oil cooler is mounted under the oil cooler. Since the traveling air is guided from the opening of the cover to cool the oil cooler by air, the cooling performance of the oil cooler can be improved. Moreover, the arrangement and size of the radiator are not limited by the arrangement of the oil cooler, so that the cooling performance of the radiator can be improved and the height of the bonnet can be reduced. further,
A large space can be secured between the radiator and the front bumper to prevent the radiator and the oil cooler from being damaged at the time of collision.

According to the second aspect of the present invention, the oil cooler can be easily mounted by disposing the oil cooler on the cross member, and the oil cooler can be easily mounted by the cross member and the rod-shaped parts. According to the invention of claim 3, which has an effect of preventing a stepping stone from hitting the cooler, the rod-shaped part is constituted by an oil pipe, so that the oil cooler can be used by utilizing existing parts. The stepping stones can be prevented from colliding, and the oil pipe can be cooled by the traveling wind guided from the opening of the undercover, thereby contributing to an improvement in oil cooling.

According to the fourth aspect of the invention, the vibration transmitted to the steering device via the fromm and the cross member can be reduced by the vibration reducing means.

According to the fifth aspect of the present invention, the vibration is reduced by a dynamic damper having the oil cooler as a mass by a simple structure in which the oil cooler is simply attached to the cross member via a rubber bush. Since the means can be configured, it is very advantageous in realizing the implementation.

[Brief description of the drawings]

FIG. 1 is a side view showing a component arrangement state in an engine room of a four-wheel drive vehicle having an oil cooler arrangement structure according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view showing a frame structure of the vehicle.

FIG. 5 is a side view of the same.

[Explanation of symbols]

 1L, 1R Frame 3 Cross member 11 Steering device 22 Engine room 24 Radiator 25 Engine 26 Oil pan 36 Undercover 37 Opening 38 Inclined surface 39 Space 40 Oil cooler 43 Rubber bush 44 Dynamic damper (vibration reduction means) 46 Oil pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-114031 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F01P 11/08 B60K 11/04

Claims (5)

(57) [Claims] 1. A radiator in an engine room,
An engine with an oil pan is arranged at the bottom,
In a vehicle provided with an undercover provided so as to cover a lower part of the radiator from a front side thereof, the undercover is provided with an opening for guiding traveling wind to the rear of the radiator in an engine room. The oil pan of the engine is located at the rear, and the oil pan has an inclined surface that is inclined downward toward the rear, and an oil cooler is provided in a space between the opening and the inclined surface. The arrangement structure of the oil cooler, wherein the oil cooler is arranged. 2. The oil cooler is arranged in a vehicle width direction along a cross member provided between left and right frames extending in the front-rear direction of the vehicle body on both left and right sides of the vehicle body. The arrangement structure of an oil cooler according to claim 1, wherein a rod-shaped component extending in the vehicle width direction in parallel with the oil cooler is arranged between the cooler and the opening. 3. The arrangement structure of an oil cooler according to claim 2, wherein said rod-shaped part is an oil pipe connected to an oil cooler. 4. A steering device is supported near a connecting portion between the frame and the cross member, and the frame or the cross member reduces vibration transmitted to the steering device via these members. 3. The arrangement structure of an oil cooler according to claim 2, wherein a vibration reducing means is provided. 5. The arrangement structure of an oil cooler according to claim 4, wherein the vibration reducing means is a dynamic damper having the oil cooler as a mass by attaching the oil cooler to a cross member via an elastic body.