JPH05262143A - Outside air introducing structure for engine room - Google Patents

Abstract

PURPOSE:To provide an outside air introducing structure for an engine room which improves the ventilation performance of the upper part of the engine room, by effectively blowing the outside air into the upper part of the engine room, and improves the cooling performance for an engine and prevents the lowering of the durability due to the heat of each auxiliary. CONSTITUTION:A shroud upper member 8 which extends in the car width direction in the front upper part of a car body and a radiator 5 arranged under the shroud upper member 8 are connected through a supporting member 13 interposed between both, and the space surrounded by the lower edge part of the shroud upper member 8, upper edge part of the radiator 5, and a supporting member 13 is formed to an outside air introducing passage for the passing of the outside air to the upper part of an engine room from outside the car body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air introduction structure for introducing outside air from the outside of a vehicle body into the engine room.

[0002]

2. Description of the Related Art A radiator is usually arranged at the front part of a vehicle body, and as a structure for supporting the radiator on the vehicle body, as shown in Japanese Utility Model Laid-Open No. 62-37517, its cross section is an inverted U-shape. Within the cross section of the shroud upper member,
The structure is such that the upper end of the radiator is supported through the mount rubber so that it is supported, and the lower end of the radiator is supported through the mount rubber on the cross member that extends in the vehicle width direction at the front part of the vehicle body. It is disclosed.

In this structure, the radiator is elastically supported to act as a dynamic damper to reduce vibration and noise, and the upper end of the radiator is located within the cross section of the shroud upper member having an inverted U-shaped cross section. Since it is supported by entering through the mount rubber, there is no need for a mount bracket that connects the shroud upper member and the radiator, and there is an effect that the front-rear space of the engine room can be reduced.

[0004]

However, in the structure of Japanese Utility Model Laid-Open No. 62-37517, since the upper end of the radiator is supported so as to enter the cross section of the shroud upper member, the engine room is supported from outside the vehicle body. The outside air introduced into the inside does not pass between the upper end of the radiator and the lower end of the shroud upper member, and the ventilation of the upper part of the engine room behind it becomes poor, and the cooling performance of the engine deteriorates and the heat of the engine causes There is a concern that the durability of auxiliary machinery may deteriorate.

On the other hand, a vehicle provided with an opening for introducing outside air, that is, a grill between the lower end of the bonnet, the upper end of the bumper, and the left and right headlights is reduced due to the exterior design, and conversely, the lower end of the bonnet is reduced. There is a tendency for more grillless cars to come into close contact with the upper end of the bumper. In such a grillless vehicle, since the outside air is introduced into the engine room only through the opening at the bottom of the bumper, the outside air does not flow to the upper part of the radiator, the cooling performance of the radiator deteriorates, and the ventilation of the upper part of the engine room is reduced. It is feared that the durability of each auxiliary machine may deteriorate due to the deterioration of the temperature.

Therefore, in order to solve such a problem, the object of the present invention is to effectively introduce the outside air into the upper part of the engine room to improve the ventilation of the engine room, and at the same time, to improve the cooling performance of each engine and each auxiliary. The purpose is to improve the durability of the machine.

[0007]

In order to achieve the above object, the constitution of the present invention is as follows.

According to the first aspect of the present invention, an engine for introducing outside air into an engine room having a front wall by a radiator disposed below the shroud upper member extending in the vehicle width direction at the front part of the vehicle body and the upper part thereof. In the structure for introducing outside air into the room, an outside air introduction passage for introducing outside air from the outside of the vehicle body into the engine room is formed between the lower end of the shroud upper member and the upper end of the radiator.

According to the second aspect of the present invention, an engine for introducing outside air into an engine room, in which a radiator disposed in the front part of the vehicle body and below the shroud upper member extending in the vehicle width direction, forms the front wall. The structure for introducing the outside air into the room is introduced from the opening to the outside air introduction passage that is arranged at a position higher than the opening that is opened only in the lower portion of the front wall of the vehicle body and that is configured to include the bonnet and the bumper. The outside air is passed through the space surrounded by the front wall of the vehicle body and the radiator.

According to the third aspect of the present invention, an engine for introducing outside air into an engine room which has a radiator disposed at a front portion of a vehicle body and below a shroud upper member extending in a vehicle width direction forms a front wall. The outside air introduction structure into the room supports the radiator with the shroud upper member at both ends of the radiator via a supporting member interposed between the radiator and the shroud upper member,
A space surrounded by both the support members, the lower end of the shroud upper member and the upper end of the radiator is used as the outside air introduction passage.

According to a fourth aspect of the present invention, an engine for introducing outside air into an engine room forming a front wall by a radiator disposed below the shroud upper member extending in the vehicle width direction at the front part of the vehicle body and the upper part thereof. The structure for introducing the outside air into the room is provided with a sub-tank branched from the cooling water passage communicating the radiator and the engine, and an intermediate pipe connecting the sub-tank and the radiator is connected to the outside air wind passing through the outside air introduction passage. It is placed overlapping the road.

According to the fifth aspect of the present invention, an engine for introducing outside air into an engine room, in which a radiator provided at a front portion of a vehicle body and below a shroud upper member extending in a vehicle width direction, forms a front wall. In the structure for introducing outside air into the room, the upper end portion of the heat exchanger arranged in the front portion of the radiator is arranged at a position lower than the upper end portion of the radiator.

According to a sixth aspect of the present invention, an engine for introducing outside air into an engine room, which is a front wall of a radiator disposed below a shroud upper member extending in a vehicle width direction at a front portion of a vehicle body and an upper portion thereof. The structure for introducing outside air into the room is such that the lower end portion of the radiator is arranged at the front portion of the vehicle body and at the lower portion in front of the front end portion of the cross member extending in the vehicle width direction and below the upper end portion of the cross member. There is.

According to a seventh aspect of the present invention, an engine for introducing outside air into an engine room forming a front wall by a radiator disposed below the shroud upper member extending in the vehicle width direction at the front part of the vehicle body and the upper part thereof. In the structure for introducing outside air into the room, the bonnet lock is arranged in the space created by arranging the upper end of the heat exchanger arranged at the front of the radiator at a position lower than the upper end of the radiator. ..

According to the eighth aspect of the present invention, an engine for introducing outside air into an engine room which has a radiator disposed at a front portion of the vehicle body and below a shroud upper member extending in a vehicle width direction forms a front wall. In the outside air introduction structure into the room, the radiator is elastically supported by the cross member at the lower end portion and by the shroud upper member at the upper end portion.

[0016]

According to the configuration of claim 1,
By forming an outside air introduction passage for introducing outside air from the outside of the vehicle body into the engine room between the lower end of the shroud upper member and the upper end of the radiator, the outside air can be effectively blown to the upper part of the engine room. Therefore, the ventilation in the engine room can be improved, and the cooling performance of the engine and the durability of each auxiliary device can be improved.

According to the second aspect of the invention, the opening is provided in the outside air introducing passage which is arranged at a position higher than the opening which is formed only in the lower portion of the front wall of the vehicle body and which is provided with the bonnet and the bumper. By passing the outside air introduced from the vehicle body through the space surrounded by the front wall of the vehicle body and the radiator, even in a vehicle having an opening opened only at the lower portion of the front wall of the vehicle body, the outside air is discharged from the upper portion of the radiator. To improve the cooling performance of the radiator. Further, since the outside air can be effectively blown to the upper part of the engine room, the ventilation of the engine room can be improved, and the cooling performance of the engine and the durability of each auxiliary device can be improved.

According to the third aspect of the present invention, the radiator is supported by the shroud upper member at both ends of the radiator through the supporting member interposed between the radiator and the shroud upper member, and both the supporting members are supported. Since the space surrounded by the lower end of the shroud upper member and the upper end of the radiator serves as the outside air introduction passage, it is possible to sufficiently maintain the supporting rigidity of the radiator.
The opening area of the outside air introduction passage can be secured.

According to the structure described in claim 4, a sub-tank is provided by branching from a cooling water passage communicating the radiator and the engine, and an intermediate pipe connecting the sub-tank and the radiator is passed through the outside air introduction passage. Since it is arranged so as to overlap the air passage of the outside air, the cooling performance of the intermediate pipe can be improved, and the air-water separation property of the engine cooling water passing through the inside of the intermediate pipe can be improved.

According to the fifth aspect of the invention, since the upper end portion of the heat exchanger arranged at the front portion of the radiator is arranged at a position lower than the upper end portion of the radiator, the ventilation resistance to the upper portion of the radiator is increased. The size of the radiator becomes smaller, and the outside air can be uniformly blown to the entire radiator, so that the cooling performance of the radiator can be improved.

According to the structure of claim 6, the lower end of the radiator is located in front of the vehicle body and below the upper end of the cross member in front of the front end of the cross member extending in the vehicle width direction. Since the radiator can be arranged further downward by arranging in the above, it is possible to make the opening area of the outside air introduction passage large, and it is possible to form the bonnet line of the vehicle body lower and The resistance can be reduced.

According to the seventh aspect of the present invention, the bonnet lock is provided in the space portion generated by disposing the upper end portion of the heat exchanger arranged in the front portion of the radiator at a position lower than the upper end portion of the radiator. By arranging, the front overhang amount of the vehicle body, that is, the distance from the center of the front axle to the front end portion of the bumper can be shortened, and the turning performance of the vehicle body can be improved.

According to the structure described in claim 8, the radiator is elastically supported at the lower end portion by the cross member and at the upper end portion by the shroud upper member, so that the radiator is caused by the natural frequency of the vehicle body and the engine frequency. It can act as a dynamic damper that cancels resonance, and can reduce vibration and noise of the vehicle body. Further, since the lower end portion of the radiator is arranged at the front portion of the vehicle body and at the lower portion thereof in front of the front end portion of the cross member extending in the vehicle width direction and below the upper end portion of the cross member, that is, the pitching of the vehicle body. Since the radiator is arranged at a position where the amplitude of is larger, the dynamic damper effect can be further improved.

[0024]

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

FIG. 1 is a front view of an outside air introducing structure E of the present invention,
2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG.
4 is a cross-sectional view taken along line IV-IV of FIG. 3 and is an enlarged view of a connecting portion between a radiator upper end portion and a shroud upper member lower end portion, and FIG.
FIG. 4 is an enlarged view of a connecting portion between a radiator lower end portion and a cross member upper end portion in a cross-sectional view taken along line IV.

An embodiment in which the outside air introducing structure E of the present invention is applied to a vehicle (hereinafter referred to as a grillless type vehicle) having an opening only in the lower portion of the front wall of the vehicle body, which includes a bonnet and a bumper, will be described in detail. explain.

The front part of the grillless vehicle is a bumper 1 attached to the foremost part of the vehicle body, a bonnet 2 covering the engine room and forming an outer wall of the vehicle body, an opening 3 for introducing outside air into the engine room, a vehicle body uppermost part. It is constituted by an under cover 4 forming a lower part.

Here, the engine room is composed of a radiator 5 arranged at the rear part of the bumper 1 and a front wall composed of a shroud panel (not shown), and wheel aprons 6 arranged on the left and right sides of the vehicle body. A side wall, a rear wall composed of a dash panel (not shown) separating the engine room and the passenger room, and a space surrounded by the above four sides.

The shroud panel located in the front of the engine compartment has a shroud upper member 8 extending in the vehicle width direction at the front end and upper part of the vehicle body at the upper end, and at the lower end at the front part and lower part of the vehicle body at the lower end. On the cross member 9 extending in the width direction, the wheel apron 6 is provided at the side end.
To be joined to. The wheel apron 6 located on the side of the engine compartment is attached to the shroud panel at the front end.
A wheel apron reinforcement 10 extending in the traveling direction of the vehicle body at the upper end and at the side of the vehicle body and at the upper portion.
In addition, the lower end is joined to the front frame 11 that extends to the side of the vehicle body and the lower portion in the traveling direction of the vehicle body, and is joined to the dash panel at the rear end portion.

In the grillless vehicle as in this embodiment, the bumper 1 and the hood 2 are in close contact with each other to form a shielded front wall of the vehicle body. Therefore, the outside air is introduced into the inside of the vehicle body only through the opening 3 formed in the lower portion of the front wall of the vehicle body which is closed.

An outside air introducing passage 16 for introducing outside air introduced from the opening 3 into the engine room cools the lower end of the shroud upper member 8 and the engine 7 arranged on the engine center member 12. It is composed of an upper end portion of the radiator 5 and a side portion of a support member 13 that supports the radiator 5 on the shroud upper member 8. The shroud upper member 8 has an inverted U-shaped cross section, and is joined to the wheel apron reinforcement 10 at both ends.

The radiator 5 has a well-known structure,
The upper end of the radiator 5 is supported by the shroud upper member 8 at both ends thereof via a support member 13 having an inverted U-shaped cross section and a mount rubber 14.

The support member 13 is attached to a mounting portion projecting from the radiator 5 with a bolt. The mount rubber 14 is interposed between the shroud upper member 8 and the support member 13, and the pin 15
Thus, the shroud upper member 8, the support member 13, and the mount rubber 14 are held. (See Figure 4)

The lower end of the radiator 5 forms a pin-shaped portion, and the pin-shaped portion is inserted into the holes of the bracket 17 and the mount rubber 18 joined to the cross member 9, and the radiator 5 is inserted through the bracket 17. Will be supported by the cross member 9. The bracket 17 is shown in FIG.
Thus, the lower end of the radiator 5 is arranged in front of the front end of the cross member 9 and below the upper end of the cross member 9. (See Figure 5)

The air conditioning condenser 19 arranged in front of the radiator 5 has a well-known structure, but the upper end of the air conditioning condenser 19 is arranged at a position lower than the upper end of the radiator 5. Air conditioning condenser 19
The lower end of is supported by the bracket 17 via a bracket 20.

Further, a bonnet lock 21 is arranged in a space portion formed by disposing the upper end portion of the air conditioning condenser 19 arranged in front of the radiator 5 at a position lower than the upper end portion of the radiator 5. 21 is supported on the front surface of the shroud upper member 8. Behind the radiator 5, an air-conditioning add fan 22 and an engine cooling electric fan 23 are arranged.

The radiator 5 has a forward path 24 for sending cooling water to the engine and a return path 25 for returning cooling water from the engine.
And an intermediate pipe 27 that connects the radiator 5 and the sub-tank 26 that separates the engine cooling water into water and water. Of these, the return path 25 and the sub tank 26 are communicated with each other by a communication path 28, and the intermediate pipe 27 is arranged so as to overlap with the air path of the outside air that has passed through the outside air introduction path 16. Further, the upper end surface of the sub tank 26 is arranged at a position higher than the water jacket in the cylinder head of the engine 7.

The engine cooling water derived from the radiator 5 enters the engine 7 via the outward path 24, circulates in the engine 7 and is then derived to the return path 25, and returns to the radiator 5 via the return path 25.

Since the engine cooling water circulated in the engine 7 is pulsating while the engine is operating, the engine cooling water exceeding the allowable amount of water in the return path 25 is introduced into the return path 25. Therefore, the surplus cooling water passes through the communication passage 28 and enters the sub tank 26. Since the engine cooling water that has circulated in the engine 7 decreases due to the engine cooling water having entered the sub tank 26, the engine cooling water that has entered the sub tank 26 returns to the radiator 5 via the intermediate pipe 27.

Further, since the upper end surface of the sub-tank 26 is arranged at a position higher than the water jacket in the cylinder head of the engine 7, the air contained in the engine 7 at the time of starting the engine and the engine cooling water during engine operation. The air contained in the sub-tank 26 also enters the sub-tank 26 through the communication passage 27 and is released from the sub-tank 26 into the atmosphere.

The intermediate pipe 27 through which the cooling water in the sub tank 26 passes when returning to the radiator is arranged so as to overlap with the air passage of the outside air passing through the outside air introduction passage 16, and the engine inside the intermediate pipe 27 is arranged. The cooling water is cooled.

From the opening 3, the outside air is introduced into the engine room through the air passage A that goes straight through the radiator 5 and the space surrounded by the air conditioning condenser 19 and the front wall of the vehicle body. It is carried out in two routes including the air passage B passing through the outside air introduction passage 16.

The outside air introduced by the air passage A passes from the middle part to the lower part in the engine room to ventilate the hot air. The outside air introduced by the air passage B passes through the upper part in the engine room to ventilate the hot air.

According to the above embodiment, the shroud upper member 8 and the radiator 5 are arranged at a higher position than the opening 3 which is opened only in the lower part of the front wall of the vehicle body which is shielded, the upper end of the radiator 5, and the supporting member. The space surrounded by 13 and
The outside air is introduced from the outside of the vehicle body into the engine room, and the outside air introduced from the opening 3 is passed through the outside air introducing passage 16 through the space surrounded by the front wall of the vehicle body and the radiator. In a grillless vehicle, the outside air can be blown to the upper part of the radiator, and the cooling performance of the radiator can be improved. At the same time, the outside air can be effectively blown to the upper part of the engine room, so that the cooling performance of the engine and the durability of each auxiliary machine can be improved.

In the present embodiment, the example in which the close contact portion between the bonnet and the bumper is located in front of the outside air introducing passage 16 has been described, but the close contact portion is also located above the outside air introducing passage 16. It can also be applied to cars.

Further, in the present embodiment, an example of a grillless type vehicle having an opening opened only in the lower portion of the front wall of the vehicle body which has been shielded is shown. However, the present invention is applicable to a bonnet, a bumper and a headlight. It can also be applied to a vehicle having an opening for introducing outside air in the enclosed space.

Further, the radiator 5 and the shroud upper member 8 are supported by the shroud upper member 8 at both ends of the radiator 5 via the supporting members 13 interposed therebetween, and both the supporting members 13 and the shroud are supported. Since the space surrounded by the lower end of the upper member 8 and the upper end of the radiator 5 is the outside air introduction passage 16,
The supporting rigidity of the radiator can be sufficiently maintained, and the opening area of the outside air introducing passage 16 can be secured.

In this embodiment, the radiator 5 and the shroud upper member 8 are supported by the support member 13 interposed therebetween, but this method is not always necessary. As another method, the support portion may be formed integrally with the lower end portion of the shroud upper member 8 and connected to the radiator upper end portion, or the support portion may be formed integrally with the radiator upper end portion and the shroud upper member 8 lower end portion. There are methods such as connecting.

Further, since the intermediate pipe 27 that connects the sub tank 26 that communicates the radiator 5 with the engine 7 and the radiator 5 is arranged so as to overlap with the air passage of the outside air that has passed through the outside air introduction passage 16, the above-mentioned intermediate The cooling performance of the pipe 27 can be improved, and the intermediate pipe 27
It is possible to improve the air-water separability of the engine cooling water passing through the inside.

The intermediate pipe 27 may be arranged in the rear of the radiator 5 or the shroud upper member 8 in addition to the arrangement of this embodiment. In that case, it is necessary to change the air passage of the outside air that has passed through the outside air introduction passage 16 by using a plate that changes the wind direction so that the intermediate pipe 27 and the above-mentioned air passage overlap.

Further, by arranging the upper end of the air conditioning condenser 19 arranged in the front part of the radiator 5 at a position lower than the upper end of the radiator 5, the ventilation resistance to the upper part of the radiator becomes small, and the entire radiator becomes small. The outside air can be uniformly blown, and the radiator cooling performance can be improved. Although the heat exchanger is the air conditioning condenser 19 in this embodiment, a heat exchanger such as an intercooler may be arranged instead.

Furthermore, since the bonnet lock 21 is arranged in the space created by disposing the upper end of the air conditioning condenser 19 arranged at the front of the radiator 5 at a position lower than the upper end of the radiator 5, the bonnet lock 21 is arranged. The amount of front overhang, that is, the distance from the center of the front axle to the front end of the bumper can be shortened, and the turning performance of the vehicle body can be improved.

By arranging the lower end of the radiator 5 at the front of the vehicle body and at the lower part in front of the front end of the cross member 9 extending in the vehicle width direction and below the upper end of the cross member 9, Since the radiator 5 can be arranged further downward, the opening area of the outside air introduction passage 16 can be increased, and the bonnet line of the vehicle body can be formed lower, which reduces the air resistance of the vehicle body. be able to.

The radiator 5 is attached at the lower end to
The cross member 9 is supported by the mount rubber 18, and the upper end portion of the shroud upper member 8 is supported by the mount rubber 14 so that the cross member 9 acts as a dynamic damper for canceling resonance caused by the natural frequency of the vehicle body and the engine frequency. Therefore, vibration and noise of the vehicle body can be reduced.

In this embodiment, the radiator 5 is supported by the mount rubber at the upper and lower ends, but it is not always necessary.
The method is not limited to this, and other examples include a method using a spring, a damper, or the like.

[Brief description of drawings]

FIG. 1 is a front view of an outside air introduction structure E.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of FIG.

4 is a cross-sectional view taken along line IV-IV of FIG. 3 and is an enlarged view of a connecting portion between a radiator upper end portion and a shroud upper member lower end portion.

5 is a cross-sectional view taken along line IV-IV of FIG. 3 and is an enlarged view of a connecting portion between a radiator lower end portion and a cross member upper end portion.

[Explanation of symbols]

Opening 3, radiator 5, shroud upper member 8, cross member 9, support member 13, outside air introduction passage 1
6, air conditioning condenser 19, bonnet lock 21, sub-tank 26, intermediate pipe 27.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kitano 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (8)

[Claims] 1. A structure for introducing outside air into an engine room, wherein a radiator disposed at a front portion of a vehicle body and below a shroud upper member extending in a vehicle width direction introduces outside air into an engine room forming a front wall. In the outside air introduction passage into the engine room, an outside air introduction passage for introducing outside air from the outside of the vehicle body into the engine room is formed between a lower end portion of the shroud upper member and an upper end portion of the radiator. Construction. 2. The outside air introduction passage is arranged at a position higher than an opening opened only at a lower portion of a front wall of a vehicle body, which is formed of a bonnet and a bumper, and the outside air introduced through the opening is introduced. The outside air introduction structure for an engine room according to claim 1, wherein the outside air introduction passage is passed through the space surrounded by the front wall of the vehicle body and the radiator to the outside air introduction passage. 3. The radiator is supported by the shroud upper member at both ends of the radiator via a supporting member interposed between the radiator and the shroud upper member, and the both supporting members and the lower end portion of the shroud upper member and The outside air introduction structure into the engine room according to claim 1, wherein a space surrounded by a radiator upper end portion is used as the outside air introduction passage. 4. A sub-tank is provided by branching from a cooling water passage communicating between the radiator and the engine, and an intermediate pipe connecting the sub-tank and the radiator is overlapped with an air passage for the outside air passing through the outside air introduction passage. The outside air introduction structure into the engine room according to claim 1, wherein the outside air introduction structure is arranged. 5. The outside air introduction into the engine room according to claim 1, wherein an upper end portion of the heat exchanger arranged at a front portion of the radiator is arranged at a position lower than an upper end portion of the radiator. Construction. 6. A lower end portion of the radiator is arranged at a front portion of a vehicle body and at a lower portion thereof in front of a front end portion of a cross member extending in a vehicle width direction and below an upper end portion of the cross member. The structure for introducing outside air into the engine room according to claim 1. 7. A bonnet lock is arranged in a space formed by arranging the upper end of the heat exchanger arranged in the front part of the radiator at a position lower than the upper end of the radiator. Item 5. The structure for introducing outside air into the engine room according to Item 5. 8. The engine room according to claim 6, wherein the radiator is elastically supported by a cross member at a lower end portion and elastically supported by a shroud upper member at an upper end portion. Outside air introduction structure to.