JPH01317829A - Cooling structure of vehicle - Google Patents

Abstract

PURPOSE:To smooth the flow of cooled vent and improve the cooling efficiency of the objects to be cooled placed in the way of a passage by forming a passage for guiding the cooled vent between a lead-in part and an exhaust part of the cooled vent formed at the lower and upper part of the front part of a car body. CONSTITUTION:In the front space B of a car body, a spare tire pan 10 is provided on a bumper 11 supported by a fixing member 12 as well as a radiator 4 and a cooling fan 5 are provided in its lower part. A lead-in part 18 for leading the cooled vent into the front space B of a car body is provided open below the bumper 11. An exhaust part 23 of the cooled vent is further formed between the back end part of a bonnet 14 and a cowl part 22. A passage 24 for guiding the cooled vent is formed between the lead-in part 18 and the exhaust part 23 by means of a dash panel 25, an under duct 26 and the bottom face part 10a of the spare tire pan 10. As a result, sufficient cooled vent is passed through to the radiator 4 and the cooling efficiency is improved.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention provides a cooling structure for a vehicle, particularly for more effectively cooling objects to be cooled such as a radiator disposed under the hood that covers the front upper surface of the vehicle body. The present invention relates to a cooling structure for a vehicle.

(Prior Art) In recent years, vehicle heights have been made as low as possible due to demands for improvements in vehicle body design and aerodynamic characteristics. In this case, the height of the front part of the car body is naturally set low, but the front part of the car body is equipped with a radiator for cooling the engine, so It was not possible to set the vehicle height at the front of the vehicle infinitely low, so for example,
As described in Publication No. 78827, by tilting the radiator under the bonnet that covers the upper surface of the front part of the car body forward, the vehicle height of the front part of the car body can be suppressed and the vehicle height can be reduced as described above. Efforts are being made to accommodate the increase in vehicle height.

(Problem to be Solved by the Invention) By the way, when the radiator is arranged tilted forward in order to cope with the reduction in vehicle height of the vehicle body as described above, the radiator is arranged tilted forward. As a result, the amount of cooling air introduced from the front of the vehicle and passing through the radiator is reduced.
The cooling efficiency of the radiator is significantly reduced, making it difficult to cool the cooling water satisfactorily.

In addition, in midship type automobiles in which a radiator is disposed at the front of the vehicle body and an engine is disposed at the rear of the vehicle body behind the driver's seat, the cooling air that has passed through the radiator is When it collides with the dash panel located at the rear that partitions the interior of the vehicle, turbulence is generated, which obstructs the smooth flow of cooling air introduced from the front of the vehicle and reduces the cooling efficiency of the radiator. In addition, the aerodynamic characteristics were to deteriorate significantly due to the occurrence of the turbulent flow.

Therefore, the present invention forms a cooling air passage that smoothes the flow of cooling air introduced from the front of the vehicle body, and arranges a cooled object such as a radiator in the middle of the cooling air passage.
It is an object of the present invention to provide a cooling structure for a vehicle that can improve the cooling efficiency of the object to be cooled and does not impair aerodynamic characteristics.

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized by the following configuration.

That is, in the cooling structure of a vehicle, a cooling air introduction part is opened at the lower front of the car body, and a cooling air discharge part is provided between the rear end of the bonnet that covers the upper surface of the front part of the car body and the lower end of the windshield. At the same time, a cooling air passage is formed for discharging the cooling air introduced into the front part of the vehicle body from the cooling air introduction part to the outside of the vehicle from the cooling air discharge part, and an object to be cooled is disposed in the middle of the cooling air passage. It is characterized by what it did.

Further, the spare tire pan disposed below the bonnet may constitute a part of a duct forming a cooling air passage.

(Function) According to the above configuration, the cooling air introduced into the front of the car body from the cooling air introduction part opened at the lower front of the car body is effectively distributed between the rear end of the bonnet and the front through the cooling air passage. The cooling air is discharged from a cooling air discharge section provided between the cooling air and the lower end of the glass. In this case, since the flow velocity of the air flowing along the top surface of the bonnet is high, negative pressure is generated in the cooling air discharge section, and as a result, the flow of the cooling air becomes partially smoother, and the cooling air passage becomes smoother. The cooling efficiency of objects to be cooled, such as radiators for cooling the engine, placed in the middle of the engine is further improved, and the cooling water can be cooled well, and the flow of cooling air becomes smoother as described above. As a result, turbulence is not generated in the front of the vehicle and aerodynamic characteristics are not impaired. 2 In addition, if the spare tire pan disposed below the bonnet forms part of a duct that forms a cooling air passage, it is necessary to prepare a new duct member to form the cooling air passage. The number of parts can be reduced.

(Example) Embodiments of the present invention will be described below based on the drawings.

In this embodiment, a case will be described in which the vehicle cooling structure according to the present invention is applied to a midship type automobile.

As shown in FIG. 1, this automobile 1 is a two-seat type midship vehicle in which a driver's seat 2 and a passenger seat (not shown) are arranged in a cabin A. A radiator 4 and a cooling fan 5 are arranged in the vehicle body front space B in front of the arrangement position of the front wheels 3.3 (only one shown), and the left and right rear wheels are arranged behind the driver's seat 2. 6. The engine 7 is disposed at the rear of the vehicle body located slightly in front of the vehicle (only one of which is shown). Since the engine 7 and the radiator 4 are connected by a pair of cooling water supply/discharge pipes 8a and 8b, the cooling water is circulated between the radiator 4 and the engine 7 to cool the engine 7. It is configured to

Further, a spare tire pan 10 for storing and holding a spare tire 9 is disposed in the vehicle body front space B, and as shown in an enlarged view in FIG. 2, this spare tire pan 10
The front end portion of the bottom surface portion 10a is supported via a mounting member 12 by a bumper frame 11a disposed in the vehicle width direction along a bumper portion 11 at the lower front of the vehicle body. As shown in the figure, a flange portion is integrally formed around the outer periphery of the upper end of the spare tire pan 10 on a pair of left and right frame members 13.13 disposed above the vehicle body front space B in the longitudinal direction of the vehicle body. 10b is fixedly supported, so that the spare tire pan 10 is disposed below a bonnet 14 that covers the upper surface of the front part of the vehicle body.

Furthermore, as shown in FIG. 2, the spare tire pan 10
Below is a radiator 4 and a cover member 5 at the rear of the radiator 4.
A cooling fan 5 is integrally attached via a and driven by a drive motor 15. The radiator 4 is supported via a mounting member 17 by a pair of left and right side frames 16.16 (only one of which is shown) disposed below the vehicle body in the longitudinal direction of the vehicle body. Above side frame 16
．． 16 through appropriate mounting members (not shown), the radiator 4 and the cooling fan 5 are arranged in a forward-inclined state as shown.

In this embodiment, as shown in FIG. 2, a cooling air introduction part 18 for introducing cooling air into the vehicle body front space B is opened below the bumper part 11, and The rear end of the bonnet 14 and the windshield 19
A cooling air discharge section 23 is provided between the cowl section 22, which is disposed along the lower end of the cowl section 22 in the vehicle width direction, and in which a drive motor 21 for driving the wiper 20, etc. is housed. Furthermore, the cooling air introduction part 18 and the cooling air discharge part 23 are communicated with each other so that the cooling air introduced from the cooling air introduction part 18 and passed through the radiator 4 is discharged from the cooling air discharge part 23 to the outside of the vehicle. A cooling air passage 24 is formed to guide cooling air. This cooling air passage 24 is
As shown in the figure, a dash panel 2 is provided below the cowl portion 22 and partitions the interior of the vehicle interior A and the vehicle front space B.
5, an underduct 26 joined to the bottom surface 10a of the spare tire pan 10, and the bottom surface 10a of the spare tire pan 10, forming a duct-like shape.

According to the above configuration, the cooling air introduced into the vehicle body front space B from the cooling air introduction part 18 opened at the lower part of the front of the vehicle body is guided by the cooling air passage 24 and is smoothly delivered to the cooling air discharge part 23. More will be emitted. In this case, as shown by the arrow in FIG.
Negative pressure is generated near the cooling air introduction section 1.
The flow of cooling air introduced into the vehicle body front space B from 8.
As shown by the arrow in FIG. 2, the radiator 4 is partially smoothed and disposed midway in the cooling air passage 24.
The flow of the cooling air passing through the radiator 4 is improved, and the cooling efficiency of the radiator 4 is further improved, and turbulent flow of the cooling air is not generated in the vehicle body front space B, so that the aerodynamic characteristics are not impaired.

Moreover, in this embodiment, a part of the duct constituting the cooling air passage 24 is located at the bottom surface of the spare tire pan 10.
Since it is formed by using the cooling air passage 24, there is no need to newly prepare a duct member for configuring the cooling air passage 24, and the number of parts can be reduced.

(Effects of the Invention) As described above, according to the vehicle cooling structure according to the present invention,
A cooling air passage is provided between a cooling air introduction section and a cooling air discharge section provided at the lower front of the vehicle body for discharging the cooling air introduced into the front of the vehicle body from the cooling air introduction section to the outside of the vehicle through a cooling air discharge section. Due to this provision, the flow of cooling air introduced into the front of the vehicle body becomes smooth, and as a result, objects to be cooled placed in the middle of the cooling air passage are effectively cooled. The cooling efficiency of objects is further improved, and deterioration of aerodynamic characteristics can be reliably prevented.

Additionally, if the spare tire pan disposed below the bonnet forms part of a duct that forms a cooling air passage, it is necessary to prepare a new duct member to form the cooling air passage. This makes it possible to reduce the number of parts without any problems.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is an overall schematic side view of a midship type automobile to which the vehicle cooling structure according to the embodiment is applied, and main parts seen from line 2-m. FIG. 4... object to be cooled (radiator), 18... cooling air introduction section, 19... windshield, 23... cooling air discharge section, 24... cooling air passage. Figure 2 Figure 3

Claims (2)

[Claims] (1) A cooling air introduction part is opened at the lower front of the vehicle body, and a cooling air discharge part is opened between the rear end of the bonnet that covers the upper surface of the front part of the vehicle body and the lower end of the windshield. A cooling air passage is formed for discharging the cooling air introduced into the front part of the vehicle body from the cooling air introduction part to the outside of the vehicle from the cooling air discharge part, and an object to be cooled is disposed in the middle of the cooling air passage. A vehicle cooling structure featuring: (2) A cooling air introduction part is opened in the lower part of the front of the car body covered by the bonnet, and a cooling air passage is formed to guide the cooling air introduced into the front part of the car body from the cooling air introduction part to the outside of the car. A vehicle characterized in that an object to be cooled is disposed in the middle of the air passage, and a part of a duct forming the cooling air passage is constituted by a spare tire pan disposed below the bonnet. cooling structure.