JPH06280703A - Structure for introducing outside air to vehicle engine - Google Patents

Abstract

PURPOSE:To provide a structure for introducing the outside air to a vehicle engine wherein a suction port of an outside air introducing duct for an engine can be set to a position higher than in the past. CONSTITUTION:A suction port 16b of an engine outside air introducing duct 16 for introducing the outside air to a vehicle engine is made to appear in the inside of an air box 11 arranged along a car width direction between an engine room 1 and a cabin 10.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as this type, for example, there is one as shown in FIG. 3 (see Japanese Utility Model Laid-Open No. 1-83161). In the figure, reference numeral 1 is an engine room, and an engine 2 is arranged in the engine room 1. In the engine 2, the outside air sucked from an intake port 3a of an outside air introduction duct 3 for the engine is passed through an air cleaner 4. It is being supplied.

The outside air introduction duct 3 for an engine is extended toward the front of the vehicle along the side wall of the engine room 1, and the suction port 3a at the tip thereof is located in the vicinity of the radiator grill forming the front wall of the engine room 1. It is open.

Reference numeral 5 is an intake resonator.

[0005]

However, in such a conventional one, the intake port 3a of the outside air introduction duct 3 for the engine is opened in the front part of the engine room 1, and in particular, the slant nose type. In this vehicle, the position of the suction port 3a was low. Therefore, when driving on a rough road with deep water, the suction port 3a
There is a risk that water will be drawn in from the engine and the engine may malfunction.

[0006] Therefore, an object of the present invention is to provide an outside air introduction structure for a vehicle engine in which the intake port of the outside air introduction duct for the engine can be set at a position higher than before.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an intake port of an outside air introduction duct for an engine for introducing outside air into a vehicle engine is provided between an engine room and a vehicle interior. It is characterized in that it has a structure for introducing outside air into the vehicle engine facing the inside of the air box arranged along the vehicle width direction.

[0008]

[Operation] According to such means, when the engine is operated, the negative pressure causes the outside air in the air box to be sucked through the suction port of the outside air introduction duct for the engine and supplied to the engine through this duct. .

By locating the intake port of the outside air introduction duct for the engine in the air box as described above, the intake port can be set at a higher position than in the conventional case, and therefore, even when traveling on a rough road with a deep water, Is difficult to inhale.

Further, since the air box is arranged over the entire width in the vehicle width direction and the intake efficiency is almost the same regardless of the position of the outside air introducing duct for the engine, the connecting position is conventionally different. A wide range of choices and more design freedom. This is particularly advantageous when the outside air introduction duct for the engine is arranged in the engine room where a plurality of parts are congested.

[0011]

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

1 and 2 show an embodiment of the present invention.

First, the structure will be described.
An air box arranged along the vehicle width direction between the engine room 1 and the vehicle room 10. The air box 11 is
Cowl top panel 12 and dash upper panel 13
And form a closed cross-section structure. A dash lower panel 14 is connected to the side surface portion 13b of the dash upper panel 13.

The upper surface 12a of the cowl top panel 12
The outside air intake opening 12b is opened in the
The outside air is taken into the air box 11 via b.

The air box 11 is connected to an engine outside air introduction duct 16 extended from an air cleaner 15 and an air conditioning outside air introduction duct 18 extended from an air conditioning blower 17.

Specifically, the outside air introduction duct 16 for the engine
Is an upper portion 16 that is located in the air box 11 and vertically penetrates the bottom surface portion 13 a of the dash upper panel 13.
a is extended substantially horizontally toward the front of the vehicle. A suction port 16b facing the front of the vehicle is opened at this tip, and a check valve 16c is provided in the upper portion 16a.
Is provided. In addition, the upper wall portion 1 of the suction port 16b
6d is inclined obliquely downward.

On the other hand, the outside air introducing duct 18 for air conditioning penetrates the side surface portion 13b of the dash upper panel 13 and the dash lower panel 14 in a substantially horizontal direction and extends toward the front of the vehicle, and the upper portion 16a of the outside air introducing duct 16 for the engine. It is located above. The intake port 18a provided at the tip of the air-conditioning outside air introducing duct 18 is formed at a position offset forward of the vehicle from the intake port 16b of the engine outside air introducing duct 16.

Next, the operation of the structure for introducing outside air into the vehicle engine having the above structure will be described.

When the engine is stopped, the check valve 16c closes the external air introduction duct 16 for the engine, so that the odor in the air cleaner 15 does not leak into the air box 11. Therefore, when the blower 17 sucks the outside air in the air box 11 when the air conditioner is operating, the odor in the air cleaner 15 is not blown into the vehicle interior 10.

On the other hand, when the engine is operated, the check valve 16c is opened by the negative pressure, and the outside air in the air box 11 is sucked through the suction port 16b of the outside air introduction duct 16 for the engine, so that the air cleaner 15 is closed. Is supplied to the engine via.

At the same time, when the air conditioner is also operating, the outside air is also sucked from the suction port 18a of the air conditioning outside air introducing duct 18. But both ducts 1
The suction ports 16b and 18a of 6, 18 are oriented in the same direction, the positions of the suction ports 16b and 18a are offset, and the upper wall portion 16d is inclined, so that the suction ports 16b and 18a It does not reduce the inhalation efficiency.

As described above, the outside air introduction duct 16 for the engine is used.
Since the suction port 16b is located inside the air box 11, it can be set at a higher position than in the past, so that it is difficult to suck in water even when traveling on a bad road with deep water.

Further, the air box 11 is arranged over the entire width in the vehicle width direction, and the intake efficiency is almost the same regardless of the position of the outside air introduction duct 16 for the engine. A wide range of positions can be selected, and design flexibility is improved. This is particularly advantageous when the engine outside air introduction duct 16 is arranged in the engine room 1 in which a plurality of parts are congested.

[0024]

As described above, according to the present invention, the intake port of the outside air introduction duct for the engine for introducing the outside air into the vehicle engine is made to face the inside of the air box, so that the intake port can be made larger than the conventional one. Since it can be set to a high position, it is difficult to absorb water even when driving on rough roads.

Further, since the air box is arranged over the entire width in the vehicle width direction, the intake efficiency is almost the same regardless of which position the engine outside air introducing duct is connected. It has a wide range of choices, and has the practically useful effect of improving the degree of freedom in design.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a structure for introducing outside air into a vehicle engine according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing the same embodiment.

FIG. 3 is a perspective view showing a part of an engine room showing a conventional example.

[Explanation of symbols]

 1 Engine room 10 Cabin 11 Air box 16 Outside air introduction duct for engine 16b Suction port

Claims (1)

[Claims] 1. An intake port of an outside air introduction duct for an engine for introducing outside air into a vehicle engine is made to face an inside of an air box arranged along a vehicle width direction between an engine room and a vehicle room. A structure for introducing outside air into a vehicle engine.