JP2022069314A - Cooling structure of vehicle lower part - Google Patents

Abstract

To appropriately air-cool members arranged above an undercover of a vehicle.SOLUTION: A cooling structure of a lower part of a vehicle is a structure for introducing outer air into a space above an undercover 7 for covering at least a part of the vehicle from below, to air-cool members 3, 4, 41, 5, 6, and 0 located above the undercover 7. The undercover 7 is opened with an outer air introductory port 71 that penetrates the undercover to take-in travel wind to above the undercover 7, and is installed with a propeller 9 that receives travel wind and rotates to generate upward air current in a space above the undercover 7.SELECTED DRAWING: Figure 1

Description

The present invention relates to a structure for introducing outside air into a space above an undercover that covers at least a part of a vehicle from below to air-cool a member located above the undercover.

An undercover that covers the engine, radiator, and other power sources from below is attached to the bottom of the vehicle. The undercover plays a role of protecting the internal combustion engine and the like from pebbles and improving the aerodynamic characteristics by improperly turbulent the air flowing under the vehicle.

Recently, regulations on outside noise, which adversely affect the environment around the road, are being tightened. For this reason, the range in which the undercover is installed is extended rearward to just below the exhaust pipe that contributes as a sound source of noise outside the vehicle (see, for example, the following patent document).

Japanese Unexamined Patent Publication No. 2020-163881

As a result of covering the exhaust pipe from below with the undercover, it becomes difficult for the exhaust pipe and its surrounding members to be air-cooled, and it becomes difficult to appropriately lower the temperature of these members. It is not always sufficient to open an outside air inlet on the lower surface or side surface of the undercover, and the risk of heat damage to the members is higher than before.

In view of the above, it is an intended object of the present invention to enable the members arranged above the undercover of the vehicle to be appropriately air-cooled.

In the present invention, the structure is for introducing outside air into the space above the undercover that covers at least a part of the vehicle from below to air-cool the member located above the undercover, and penetrates the undercover. The cooling structure of the lower part of the vehicle is equipped with an outside air inlet that takes in the running wind above the undercover, and a propeller that rotates in response to the running wind and generates an upward airflow in the space above the undercover. Configured.

According to the present invention, the member arranged above the undercover of the vehicle can be appropriately air-cooled.

A side sectional view schematically showing a cooling structure of a lower part of a vehicle according to an embodiment of the present invention.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a cooling structure of the lower part of the vehicle according to the present embodiment. In the figure, the flow of airflow is indicated by an arrow.

A front undercover (radiator undercover, engine undercover) 2 that covers the engine 1 from below is conventionally provided below the engine 1 that is the power source of the vehicle.

An exhaust pipe 3 extends rearward from the engine 1. A muffler 4 is attached to the rear end of the exhaust pipe 3. The exhaust pipe 3 and the muffler 4 are suspended from the vehicle body. More specifically, the bracket 41 fixed to the exhaust pipe 3 or the muffler 4 is connected to the support bracket 5 fixed to the lower surface of the vehicle body via the hanger rubber 6.

On top of that, an undercover 7 that covers the exhaust pipe 3 from below is additionally provided. The undercover 7 is installed for the purpose of further reducing the noise outside the vehicle by covering the exhaust pipe 3 which is a sound source of the noise outside the vehicle.

In the present embodiment, the undercover 7 is provided with an outside air introduction port 71 that penetrates the undercover 7. The outside air introduction port 71 guides the traveling wind generated as the vehicle travels into the space above the undercover 7 from below the undercover 7. The traveling wind flowing into the space above the undercover 7 flows backward or upward. The undercover 7 is provided with a rectifying member (fins, louvers, ducts, etc.) 8 for directing the flow of the traveling wind flowing in through the outside air introduction port 71 to the rear and upper direction.

In addition, in the present embodiment, the propeller 9 is arranged behind the outside air introduction port 71 and the rectifying member 8. The propeller 9 rotates in response to the traveling wind, and generates an upward air flow in the space above the undercover 7. The propeller 9 is only supported so as to be freely rotatable, and is not accompanied by an electric motor or the like that forcibly drives the propeller to rotate.

The traveling wind that has flowed into the space above the undercover 7 through the outside air introduction port 71 is directed diagonally upward by the rectifying member 8, and is coupled with the airflow generated by the propeller 9, and the member located above, for example, the exhaust pipe 3. Effectively air-cools the muffler 4, brackets 41, 5, hanger rubber 6, parking brake cable 0, and the like.

In the present embodiment, outside air is introduced into the space above the undercover 7 that covers at least a part of the vehicle from below, and the members 3, 4, 41, 5, 6, and 0 located above the undercover 7 are air-cooled. This is a structure for the purpose of opening an outside air introduction port 71 that penetrates the undercover 7 and takes in the running wind above the undercover 7, and rotates in response to the running wind above the undercover 7. A cooling structure at the bottom of the vehicle was constructed by installing a propeller 9 that generates an upward air flow in the space.

According to the present embodiment, it is possible to blow the flow of outside air to the members 3, 4, 41, 5, 6, 0 arranged above the undercover 7 of the vehicle to appropriately cool the members 3, 4, 41, 5, 6, and 0. , These can reduce the possibility of heat damage. In order to avoid heat damage to the members 3, 4, 41, 5, 6, 0, the materials of the members 3, 4, 41, 5, 6, 0 can be changed to further improve the heat resistance, or the members can be used. It is not necessary to separately provide a heat shield plate that protects 3, 4, 41, 5, 6, and 0.

The present invention is not limited to the embodiments described in detail above. For example, in the above embodiment, the propeller 9 is arranged above the undercover, but after making an opening through the undercover for inserting the propeller, at least a part of the propeller is projected below the undercover. May be good. In such a case, the propeller rotates in response to the traveling wind flowing below the undercover, and the upward airflow generated by the propeller can be introduced into the space above the undercover through the opening.

Further, the propeller 9 may be accompanied by an electric motor or the like for rotationally driving the propeller 9.

In addition, the specific configuration of each part can be variously modified without departing from the spirit of the present invention.

7 ... Undercover 71 ... Outside air inlet 9 ... Propellers 3, 4, 41, 5, 6, 0 ... Members

Claims (1)

It is a structure for introducing outside air into the space above the undercover that covers at least a part of the vehicle from below to air-cool the members located above the undercover.
An outside air inlet that penetrates the undercover and takes in the running wind is opened above the undercover.
A cooling structure at the bottom of the vehicle equipped with a propeller that rotates in response to the running wind and generates an upward airflow in the space above the undercover.

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