JPH0541044Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to the structure of an outside air introduction section that introduces outside air into the cabin of an automobile.

(Prior Art) As shown in FIGS. 2 and 3, the structure of the outside air introduction section of a conventional automobile includes a rear end 32a of an engine hood 32 that covers an engine compartment a of an automobile body 1, and a windshield glass. A gap 36 is provided between the cowl box 35 and the front end of the cowl box 35, and outside air flowing in through the gap 36 is guided to the passenger compartment b side via a cowl box 37.

However, the structure of the above conventional outside air introduction section is as follows.
Since the opening necessary for taking in outside air was provided on the upper surface of the cowl box 37, the front end of the cowl box 37 protruded into the engine room a by that amount. Therefore, there was a problem in that the effective space in the engine room a was reduced and the layout of engine accessories and the like was hindered. This means that
It also affects the design of the car, and when trying to secure effective space in the engine compartment, large displacement cars (for example, in-line 6-cylinder engines)
For example, there was a problem that the car body had to have a long nose.

Further, as shown in FIG. 4, in the case of a conventional full-concealed wiper type vehicle, the opening 36A becomes a negative pressure due to the outside air flowing on the upper surface of the cowl box 37 in the direction of arrow A, and outside air is forced into the vehicle through the opening 36A. There was a problem in that the air inside the vehicle compartment b was sucked out rather than being taken into the compartment b, making it impossible to obtain sufficient outside air introduction performance.

(Problems to be Solved by the Invention) In view of the above, the purpose of this invention is to provide a structure for an outside air introduction part of an automobile that solves the problems in the prior art.

(Means for solving the problem) In order to achieve the above-mentioned purpose, this invention is an outside air intake structure of an automobile, in which an opening hole for outside air intake is opened at a position near the windshield glass in the engine hood. On the other hand, an air intake hole is provided in the front of the cowl box communicating with the passenger compartment, and between this air intake hole and the opening hole,
The engine hood is airtightly connected through a bellows-shaped air duct that expands and contracts as the engine hood is opened and closed, and an air scoop is provided above the opening hole of the engine hood.

(Function) The opening hole for introducing outside air in the engine hood is connected to the air intake hole on the front of the cowl box by an air duct, and the outside air flowing in from the opening hole flows into the cowl box through the air duct. An air scoop is provided at the top of the opening hole in the hood, so this air scoop can increase the outside pressure flowing into the air duct.
The ventilation performance in the vehicle interior can be improved, and the air duct is of a bellows type and can expand and contract as the engine hood is opened and closed, and the air intake hole and the opening hole are always connected in an airtight manner. Dirty air in the engine room does not flow into the passenger compartment, and only clean outside air can flow into the passenger compartment.

(Example) Next, this invention will be explained based on drawings showing an example.

FIG. 1 shows a longitudinal section of the rear end of an engine hood 2 and the front end of a windshield glass 5 of an automobile.

In the figure, the rear end of an engine hood 2 consisting of an outer hood 3 and an inner hood 4 extends to near the front end of a windshield glass 5, unlike the conventional engine hood. This engine hood 2 is provided with a louver-shaped opening hole 6 on the rear end side. Since the engine hood 2 has extended to the vicinity of the front end of the windshield glass 5 as described above,
The cowl top panel 8 that supports the rear end of the engine hood 2 and the lower end of the windshield glass 5 has a shorter length from front to back than before, and is attached below the cowl top panel 8.
Cowl box 7 with cowl top panel 8
The length of the dash head 9 forming the front and rear sides of the dash pad 9 is also shorter than that of the conventional one.

This cowl box 7 has an air intake hole 10 formed in a substantially vertical front plate portion 8a of a cowl top panel 8.

One end of a bellows-shaped air duct 14 is hermetically fixed to the inner edge of the opening hole 6 of the engine hood 2. The other end of the air duct 14 is connected to the front surface of the air intake hole 10 in an airtight manner. Note that an air scoop 13 is provided above the opening hole 6 of the engine hood 2.

In the above configuration, while the vehicle is running, air strongly flows in from the opening hole 6 of the engine hood 2 through the air scoop 13 and flows into the cowl box 7 through the air duct 14. The air that has flowed into the cowl box 7 is further transferred to the vehicle compartment b.
flow inside.

In addition, since there is no opening on the top surface of the cowl top panel 8 and its length is shortened, effective space can be secured in the engine room a, and the short-nose design of the car body can also be achieved in terms of the car body design. It can be done.

Further, when the engine hood 2 is opened, the air duct 14 is in an extended state as shown by the two-dot chain line, and the engine hood 2 can be opened and closed smoothly.

(Effects of the invention) In the structure of the outside air introduction part of a car according to the invention, an opening hole for taking in outside air is provided at a position near the windshield glass in the engine hood.
An air intake hole is provided in the front of the cowl box that communicates with the vehicle interior, and this air intake hole and the opening hole are communicated through a bellows-shaped air duct that expands and contracts as the engine hood is opened and closed. In addition to being airtightly connected, an air scoop is provided at the top of the opening hole in the engine hood, making it possible to shorten the length of the cowl box in the longitudinal direction and free up space in the engine compartment. In addition to the short-nosed body design, the air scoop allows outside air to flow strongly into the cabin through the air duct, improving ventilation performance in the cabin. Moreover, the air duct is a bellows type that can be expanded and contracted, and the air intake hole and the opening hole are connected in an airtight manner, which effectively prevents dirty air from the engine room from flowing into the passenger compartment. has.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the outside air introduction structure of an automobile according to an embodiment of the present invention, FIG. 2 is a perspective view showing the front part of a conventional automobile body, and FIG. 3 is a cross-sectional view taken along the - line in FIG. 2. FIG. 4 is an explanatory view of the airflow on the upper surface of the cowl box of a conventional full-concealed wiper type vehicle. 2... Engine hood, 5... Windshield glass, 6... Opening hole, 7... Cowl box, 10... Air intake hole, 14... Air duct,
13... Air scoop, a... Engine room,
b...Car compartment.

Claims (1)

[Scope of utility model registration request] An opening hole for taking in outside air is provided at a position near the windshield glass in the engine hood, while an air intake hole is provided at the front of the cowl box that communicates with the passenger compartment. The engine hood is airtightly connected to the opening hole by a bellows-shaped air duct that expands and contracts as the engine hood is opened and closed, and an air scoop is provided above the opening hole of the engine hood. An outside air intake structure for an automobile characterized by: