JP5327093B2 - Engine room cooling structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent heat damage caused by high-temperature air flowing into the vehicle's right side of an engine. <P>SOLUTION: A structure for cooling of engine room components includes: a radiator 14 of a cross-flow type configured such that a coolant flows from the vehicle's left side to the vehicle's right side; a cooling fan 16 with a single fan rotating clockwise in the view from the engine 12 side, disposed adjacent to the vehicle's rear side of the radiator 14; an engine design cover 18 provided on the vehicle's upper side of the engine 12, while extended over an engine mount 28 in the vehicle's right side; and a radiator support design cover 22 provided on the vehicle's upper side of a radiator support 42 and configured to have an overlap with the engine design cover 18 in the vehicle's right side from the center of the cooling fan 16 and also to form a clearance S in the vehicle's longitudinal direction together with the engine design cover 18 therebetween in the vehicle's left side from the center of the cooling fan 16. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cooling structure for engine room parts.

  In order to prevent the hot back wind that has passed through the radiator from being introduced into the engine intake system, the engine intake intake is provided on the back side of one headlamp in the engine room, and the intake intake opening is directed to the front of the engine room. And a structure for determining the rotation direction of the cooling fan of the radiator so that the flow path of the air flow by the cooling fan of the radiator is directed to the back side of the other headlamp on the side opposite to the installation side of the intake air intake. (See Patent Document 1).

Japanese Patent Laid-Open No. 9-60561

  In the above-described conventional example, air that has passed through the radiator is handled in a lump, and only the rotation direction of the cooling fan is defined, thereby achieving a low ambient temperature. However, there is a temperature distribution in the wind (air) that has passed through the radiator, and it is difficult to achieve a low ambient temperature unless the wind at a temperature suitable for the purpose is directed toward the target site. Further, the flow of the radiator passing air cannot be controlled only by defining the rotation direction of the cooling fan. Therefore, there is still room for improvement in the cooling of the engine room parts in recent years where a large number of parts are arranged.

  In consideration of the above-described facts, an object of the present invention is to suppress heat damage caused by high-temperature air flowing into the right side of the engine.

  According to the first aspect of the present invention, there is provided an engine provided with left and right engine mounts in the engine room at the front portion of the vehicle and provided with exhaust system parts on the vehicle rear side, and a pair of upper and lower radiator supports extending in the vehicle width direction. Is supported on the vehicle front side of the engine, and is disposed adjacent to the rear side of the radiator of the cross flow type radiator set so that the cooling water flows from the left side of the vehicle to the right side of the vehicle, A single cooling fan that rotates clockwise when viewed from the engine side and flows the air on the radiator side to the rear of the vehicle, and is provided on the vehicle upper side of the engine and extends to the engine mount on the right side of the vehicle. The engine design cover and the radiator support are provided on the vehicle upper side. The engine design cover is wrapped from the center of the cooling fan to the engine design cover on the right side of the vehicle, In the center from the vehicle left side of the fan has a radiator support designed cover constructed as longitudinal gap is formed vehicle between the engine design cover.

  In the engine room component cooling structure according to claim 1, since the radiator is a cross flow type and the cooling water flows from the left side of the vehicle to the right side of the vehicle, the temperature distribution of the air immediately after passing through the radiator and the cooling fan is The vehicle right side is cooler than the left side. And since the radiator support design cover is wrapped on the engine design cover from the center of the cooling fan to the right side of the vehicle, relatively cool air that has passed through the radiator and cooling fan flows into the right side of the engine vehicle. Become. Since the engine design cover extends over the engine mount on the right side of the vehicle, relatively cold air hits the engine mount and the components behind the engine mount. Thereby, the engine mount etc. of the vehicle right side can be cooled, and the heat damage by hot air flowing into the vehicle right side of the engine can be suppressed.

  On the other hand, on the left side of the vehicle from the center of the cooling fan, a gap in the vehicle front-rear direction is formed between the radiator support design cover and the engine design cover, so the relatively hot air that has passed through the radiator and the cooling fan is It flows out from the gap onto the engine design cover, passes over the engine design cover, and hits an exhaust system component provided on the vehicle rear side of the engine. Thereby, the exhaust system component is cooled. Since the exhaust system component and its surroundings are originally in a higher temperature atmosphere than the relatively hot air that has passed through the radiator and the cooling fan, the air that has passed through the radiator and the cooling fan can be sufficiently cooled.

  As described above, according to the engine room component cooling structure of the present invention, it is possible to obtain an excellent effect that heat damage caused by high-temperature air flowing into the right side of the engine vehicle can be suppressed.

1 to 3 relate to the first embodiment, and FIG. 1 is a plan view showing a cooling structure for engine room components. It is a 2-A-B-2 arrow sectional drawing which shows the cooling structure of engine room components. It is an expansion perspective view which shows an engine design cover. It is a top view which shows the cooling structure of the engine room components which concern on 2nd Embodiment. It is a figure which shows an example of the temperature distribution of the air immediately after passing a radiator. It is a figure which shows an example of the temperature distribution of the air immediately after passing a cooling fan. It is a perspective view which shows the cooling structure of engine room components. It is a perspective view which shows the modification of an engine design cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1 and 2, an engine room component cooling structure 10 according to the present embodiment includes an engine 12, a radiator 14, a single cooling fan 16, an engine design cover 18, and a radiator support design cover 22. ,have.

  The engine 12 is disposed in the engine room 26 of the vehicle front portion 24 via left and right engine mounts 28 and 30, and an exhaust manifold 32 as an example of an exhaust system component is provided on the vehicle rear side. The engine 12 is mounted horizontally such that the axial direction of a crankshaft (not shown) is the vehicle width direction. On the vehicle front side of the engine 12, for example, a surge tank 34 (FIG. 2) and an intake manifold 36, which are intake system components, are provided. The engine mount 28 on the right side of the vehicle is coupled to a side member 38 on the right side of the vehicle via a stay 29 (FIG. 7). The engine mount 30 on the left side of the vehicle is coupled to the transmission 31.

  As shown in FIG. 7, a dash panel 41 that partitions a vehicle compartment (not shown) and the engine room 26 is provided behind the engine 12. The illustrated vehicle is a so-called right-hand drive vehicle, and a steering column 43 penetrates the vehicle right side portion of the dash panel 41.

  The radiator 14 is supported by a pair of upper and lower radiator supports 42 and 44 (FIG. 2) extending in the vehicle width direction and is disposed on the front side of the engine 12 so that cooling water flows from the left side of the vehicle to the right side of the vehicle. It is a cross flow type heat exchanger. In the present embodiment, an air conditioner capacitor 46 is provided adjacent to the front side of the radiator 14 in the vehicle.

  The single cooling fan 16 is disposed adjacent to the rear side of the radiator 14 and, as necessary, rotates clockwise when viewed from the engine 12 side so that the air on the side of the radiator 14 flows to the rear of the vehicle. It is configured. A fan shroud 48 that covers the vehicle rear side of the radiator 14 is provided around the cooling fan 16.

  1 and 2, the engine design cover 18 is provided on the vehicle upper side of the engine 12. The engine design cover 18 is formed with an extended portion 18A that extends beyond the right side end of the engine 12 to the right side of the engine mount 28. At the rear end of the extension 18A, a deflector 18B directed obliquely downward at the rear of the vehicle is provided. The air flowing in the vehicle rear side of the extension portion 18A of the engine design cover 18 toward the rear of the vehicle is guided by the deflector 18B and is directed obliquely downward at the rear of the vehicle.

  As shown in FIG. 1, the radiator support design cover 22 is provided on the vehicle upper side of the upper radiator support 42. The radiator support design cover 22 is asymmetrical on the left and right sides of the vehicle, and the position of the rear end edge 22R on the right side of the vehicle is relative to the position of the rear end edge 22L on the left side of the vehicle with respect to the center of the cooling fan 16. Also extends to the rear of the vehicle. As a result, the radiator support design cover 22 is wrapped from the center of the cooling fan 16 to the front end edge 18F of the engine design cover 18 at the rear end edge 22R on the right side of the vehicle (FIG. 2), and from the center of the cooling fan 16 to the left side of the vehicle. A gap S in the vehicle front-rear direction is formed between the rear end edge 22L and the engine design cover 18. Further, the front end edge 22A of the radiator support design cover 22 overlaps the vehicle upper side of the radiator support 42, for example, over the entire vehicle width direction.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 and 2, in the engine room component cooling structure 10 according to the present embodiment, the radiator 14 is a cross flow type, and the cooling water flows from the left side of the vehicle to the right side of the vehicle. The temperature distribution of the air is lower on the right side of the vehicle than on the left side of the vehicle. Since the rear end edge 22R of the radiator support design cover 22 is wrapped on the engine design cover 18 from the center of the cooling fan 16 to the right side of the vehicle, the relatively low temperature air that has passed through the radiator 14 and the cooling fan 16 is provided. However, it flows in the direction of arrow C to the vehicle right side of the engine 12.

  Further, since the engine design cover 18 extends to the engine mount 28 on the right side of the vehicle, relatively low-temperature air hits the engine mount 28 and, for example, a steering column 43 (FIG. 7) which is a component behind the engine mount 28. . In particular, in the present embodiment, since the deflector 18B is provided at the rear end of the extension portion 18A of the engine design cover 18, the air flowing to the vehicle rear side of the extension portion 18A of the engine design cover 18 is rearward of the deflector 18B. Will be directed diagonally downward behind the vehicle. As a result, the engine mount 28 and the like on the right side of the vehicle can be cooled more efficiently, and heat damage caused by high-temperature air flowing into the right side of the engine 12 on the vehicle can be suppressed.

  On the other hand, a clearance S in the vehicle front-rear direction is formed between the rear end edge 22L of the radiator support design cover 22 and the engine design cover 18 from the center of the cooling fan 16 to the left side of the vehicle. The relatively hot air that has passed through 16 flows out of the gap S onto the engine design cover 18 in the direction of arrow D, passes over the engine design cover 18, and is provided on the rear side of the engine 12. It hits the manifold 32 (exhaust system part). As a result, the exhaust manifold 32 is cooled. Since the exhaust manifold 32 and its surroundings are originally in a higher temperature atmosphere than the relatively hot air that has passed through the radiator 14 and the cooling fan 16, the air that has passed through the radiator 14 and the cooling fan 16 can be sufficiently cooled. is there.

[Second Embodiment]
4, in the engine room component cooling structure 20 according to the present embodiment, the rear end edge 22M of the radiator support design cover 22 extends rearward from the left end edge 18L of the engine design cover 18 on the vehicle left side. Thereby, the clearance gap S is formed in the window shape between the radiator support design cover 22 and the engine design cover 18 by vehicle planar view.

  Further, the front end of the extension portion 18A of the engine design cover 18 is located on the rear side of the vehicle as compared with the first embodiment, and the rear end edge 22N of the radiator support design cover 22 extends to the rear side of the vehicle.

  Further, when viewed from the top of the vehicle, the corners between the vehicle rear side of the vehicle right side of the radiator support 42 and the vehicle width direction inner side of the side member 38 on the right side of the vehicle are curved from the vehicle width direction to the vehicle rear side. An air guide 50 is provided from the upper side to the lower side of the vehicle. The air guide 50 is provided below the radiator support design cover 22 in the vehicle, but may be provided integrally with the radiator support design cover 22 or may be separated from the radiator support design cover 22.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the present embodiment, as in the first embodiment, the radiator 14 is a cross-flow type, and the cooling water flows from the inlet on the left side of the vehicle to the outlet on the right side of the vehicle. Therefore, the air immediately after passing through the radiator 14 and the cooling fan 16 The temperature distribution of the vehicle is lower on the right side of the vehicle than on the left side of the vehicle (FIG. 5). FIG. 5 is a diagram showing an example of the temperature distribution. FIG. 6 is a diagram showing the temperature distribution of the air immediately after passing through the cooling fan 16. 5 and 6, it means that the region where the hatching density is low is high temperature, and the region where the hatching density is high is low temperature.

  4, in the engine room component cooling structure 20 according to the present embodiment, the rear end edge 22R of the radiator support design cover 22 is wrapped from the center of the cooling fan 16 to the engine design cover 18 on the right side of the vehicle. Since the air guide 50 curved from the vehicle width direction to the vehicle rear side is provided, relatively low-temperature air that has passed through the radiator 14 and the cooling fan 16 flows into the right side of the engine 12 in the direction of arrow C. Become.

  Furthermore, since the engine design cover 18 extends to the engine mount 28 on the right side of the vehicle, relatively low-temperature air hits the engine mount 28 and, for example, a steering column 43 (FIG. 7) which is a component behind the engine mount 28. Especially in this embodiment,

Since the air guide 50 is provided from the vehicle upper side toward the vehicle lower side, and the deflector 18B is provided at the rear end of the extension part 18A of the engine design cover 18, the vehicle of the extension part 18A of the engine design cover 18 is provided. The air that flows to the rear of the vehicle on the lower side is guided by the air guide 50 and the deflector 18B, and heads obliquely downward on the rear of the vehicle. As a result, the engine mount 28 and the like on the right side of the vehicle can be cooled more efficiently, and heat damage caused by high-temperature air flowing into the right side of the engine 12 on the vehicle can be suppressed.

  On the other hand, since a window-shaped gap S is formed between the rear end edge 22L of the radiator support design cover 22 and the engine design cover 18 on the left side of the vehicle from the center of the cooling fan 16, the radiator 14 and the cooling fan 16 are formed. The relatively hot air that has passed through the engine flows out of the gap S onto the engine design cover 18 in the direction of arrow D, passes over the engine design cover 18, and is an exhaust manifold provided on the vehicle rear side of the engine 12. 32 (exhaust system parts). As a result, the exhaust manifold 32 is cooled. Since the exhaust manifold 32 and its surroundings are originally in a higher temperature atmosphere than the relatively hot air that has passed through the radiator 14 and the cooling fan 16, the air that has passed through the radiator 14 and the cooling fan 16 can be sufficiently cooled. is there.

  With the configuration of the present embodiment, the atmospheric temperature of the exhaust manifold 32 can be lowered by, for example, 7.5 ° C. compared to the conventional structure. Further, on the left and right sides of the engine 12, the ambient temperature on the right side of the vehicle can be made lower than the ambient temperature on the left side of the vehicle.

(Modification of engine design cover)

  As shown in FIG. 8, the front end edge 18F of the engine design cover 18 is extended to the vehicle front side and the vehicle lower side of the intake manifold 36 (FIG. 4) so as to cover the intake manifold 36 with the front end edge 18F. May be. Thereby, it is possible to suppress the air passing through the cooling fan 16 from directly hitting the intake manifold 36. That is, since the front end edge 18F becomes an insulator, an increase in intake air temperature can be suppressed.

  In this modification, the front edge 18FR that overlaps the vehicle right side from the center of the cooling fan 16 (FIG. 4) is gently inclined toward the vehicle rear side on the vehicle right side. Thereby, the relatively low temperature air that has passed through the cooling fan 16 can be smoothly guided in the direction of arrow C.

  On the other hand, the front edge 18FL that overlaps the left side of the vehicle from the center of the cooling fan 16 (FIG. 4) is gently inclined toward the rear of the vehicle and the upper side of the vehicle. Thereby, the relatively high-temperature air that has passed through the cooling fan 16 can be smoothly guided in the direction of arrow D.

DESCRIPTION OF SYMBOLS 10 Engine room component cooling structure 12 Engine 14 Radiator 16 Cooling fan 18 Engine design cover 20 Engine room component cooling structure 22 Radiator support design cover 24 Vehicle front part 26 Engine room 28 Engine mount 30 Engine mount 32 Exhaust manifold (exhaust system parts) )
34 Surge tank (intake system parts)
36 Intake manifold (intake system parts)
42 Radiator support 44 Radiator support S Crevice

Claims (1)

An engine disposed in the engine room at the front of the vehicle via left and right engine mounts, and an exhaust system component provided on the vehicle rear side;
A cross flow type radiator supported by a pair of upper and lower radiator supports extending in the vehicle width direction and disposed on the vehicle front side of the engine so that cooling water flows from the vehicle left side to the vehicle right side;
A single cooling fan that is disposed adjacent to the rear side of the radiator and rotates rightward when viewed from the engine side to flow air on the radiator side to the rear of the vehicle;
An engine design cover provided on the vehicle upper side of the engine and extended to the engine mount on the right side of the vehicle,
Provided on the vehicle upper side of the radiator support, wraps on the engine design cover on the right side of the vehicle from the center of the cooling fan, and has a gap in the vehicle front-rear direction between the center of the cooling fan and the engine design cover on the left side of the vehicle. A radiator support design cover configured to be formed;
A cooling structure for engine room parts.

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