JPH09209858A - Intake device for vehicular engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contract a space for arrangement by arranging most parts except for a downstream side part connected to the first side wall of an air cleaner in an outside air introducing duct, in a specific part between the second side wall of the air cleaner and a vehicle constituent member forming one side of an engine room. SOLUTION: An air cleaner 6 is arranged on a side in an engine room 3, and an intermediate part 11 between a downstream side part 10 connected to the first side wall of the air cleaner 6 and an upstream side part 12 in which an outside air intake 18 is arranged, is extended to be positioned near to the first and second side walls of the air cleaner 6. The intermediate part 11 is also made to reach to the upstream side part 12 by being folded back into an U-shape in a space between the second side wall and a vehicle constituent member 17. A resonator chamber forming part 16 is interposed in a part in close proximity to the second side wall so as to be arranged approximately in parallel with the air cleaner 6, and most parts except for the downstream side part 10 are stored in the upper part of the space formed between the second side wall and the vehicle constituent member 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner which is connected to an engine mounted on a vehicle through an intake duct, one end of which is an outside air intake and the other end of which is connected to an air cleaner, and a resonator which is provided at an intermediate portion. The present invention relates to an intake device for a vehicle engine, which includes an outside air introduction duct in which a chamber forming portion is interposed.

[0002]

2. Description of the Related Art An intake system attached to an engine mounted on a vehicle is provided with an air cleaner containing a filter element for purifying intake air supplied to the engine. For example, one end of the air cleaner is an outside air intake port. The other end of the outside air introducing duct is connected to the other end of the intake duct whose one end is connected to the intake manifold of the engine. As a result, the intake air, which is the outside air taken in from the outside air intake port and guided to the air cleaner through the outside air introduction duct, is purified by the filter element housed in the air cleaner, and the purified intake air is passed through the intake duct to the intake manifold of the engine. Will be guided.

Further, in the intake device, in addition to the air cleaner, a resonator chamber forming portion which forms a resonator chamber which plays a role of reducing intake noise generated by pulsation of intake air guided to the air cleaner through the outside air introducing duct is provided with an outside air introducing chamber. It is proposed to attach it to the duct. The resonator chamber forming portion is installed such that the effective volume of the resonator chamber formed by the resonator chamber, the effective path length from the outside air introducing duct to the resonator chamber, etc. are selected so that the intake noise reducing effect is most effectively obtained.

In the case where the resonator chamber forming portion is provided in the outside air introducing duct, the resonator chamber formed by the resonator chamber forming portion is often assumed to have a relatively large volume, and an engine in a vehicle. It is necessary to secure a space for installing the resonator chamber forming part in the room. For example,
In the intake system for a vehicle engine disclosed in Japanese Patent Laid-Open No. 3-42060, a side frame extending in the vehicle front-rear direction formed below the position where the air cleaner is arranged in the engine room of the vehicle and a vehicle body side wall facing the side frame. The resonator chamber forming part is installed together with the outside air introducing duct in which the resonator chamber forming part is provided in the space between the and.

In such a conventionally proposed air intake system for a vehicle engine, the outside air introduction duct has its downstream side portion connected to the lower portion of the air cleaner and its upstream side portion provided with the outside air intake duct. With the inlet facing the air cleaner, the inlet is brought close to the side wall of the vehicle body, and the intermediate portion forms a curved portion protruding downward from the air cleaner. The resonator chamber forming portion is connected to the curved portion of the outside air introducing duct via the branch duct.

[0006]

However, as described above, in the engine room of the vehicle, the side frame extending in the vehicle body front-rear direction formed below the position where the air cleaner is arranged and the vehicle body side wall facing the side frame are formed. In the intake device in which the resonator chamber forming portion is installed together with the outside air introducing duct in which it is provided in the space between, the wheel house forming portion protruding from the vehicle body side wall into the engine room allows the outside air introducing duct and the outside air introducing duct to be installed. There is a possibility that it may be difficult to secure an installation space for the resonator chamber forming portion connected to it.

Further, the reduction of the intake noise generated by the outside air introduced into the air cleaner through the outside air introduction duct is increased by increasing the length of the outside air introduction duct, or the volume of the resonator chamber formed by the resonator chamber forming portion is reduced. Although the expansion is intended to achieve the effect more effectively, the length of the outside air introduction duct is increased due to the restriction due to the relatively small vertical space in the engine room, or It becomes difficult to expand the volume of the resonator chamber formed by the resonator chamber forming portion as desired.

In view of the above point, the present invention comprises an outside air introducing duct connected to an air cleaner arranged in the engine room of a vehicle and a resonator chamber forming portion provided in the outside air introducing duct, and these are provided in the engine room. When installed inside, the space for placement will be comparatively small, and it will be secured without being obstructed by the wheel house forming part that overhangs from the vehicle body side part to the inside of the engine room. Also, it is possible to increase the length of the outside air introducing duct or the volume of the resonator chamber formed by the resonator chamber forming portion as desired within a range that does not increase the intake resistance in the outside air introducing duct. An air intake device for a vehicle engine is provided.

[0009]

An intake system for a vehicle engine according to the present invention is arranged laterally in an engine room provided in a vehicle and intakes an intake manifold in an engine installed in the engine room. The air cleaner includes an air cleaner connected through the duct, an outside air introducing duct that guides the outside air to the air cleaner, and a resonator chamber forming portion that forms a resonator chamber that reduces the intake noise generated by the outside air introduced to the air cleaner through the outside air introducing duct. Are arranged between the downstream side portion connected to the first side wall portion of the air cleaner, the upstream side portion provided with the outside air intake, and the downstream side portion and the upstream side portion, and the downstream side portion of the air cleaner Proximity to both the first side wall and the second side wall adjacent to the first side wall. Having an intermediate portion that bends and extends as much as possible and is folded back in a U shape in the space between the second side wall portion of the air cleaner and the vehicle body constituent member that forms one side portion of the engine room to reach the upstream side portion At the same time, the resonator chamber forming portion is interposed in an intermediate portion of the outside air introducing duct that is close to the second side wall portion of the air cleaner, and is arranged substantially parallel to the air cleaner.
Be composed.

In the air intake system for a vehicle engine according to the present invention constructed as described above, the air cleaner is arranged laterally in the engine room and is connected to the first side wall portion of the air cleaner in the outside air introducing duct. The intermediate portion between the downstream side portion and the upstream side portion provided with the outside air intake is both the first side wall portion of the air cleaner from the downstream side portion and the second side wall portion adjacent to the first side portion. Is bent to extend in the vicinity of, and is folded back in a U shape in the space between the second side wall portion of the air cleaner and the vehicle body constituent member forming one side portion of the engine room to reach the upstream side portion. The resonator chamber forming portion is interposed in a portion of the intermediate portion of the outside air introducing duct close to the second side wall portion of the air cleaner, and is substantially parallel to the air cleaner. As a result, most of the outside air introduction duct except the downstream side portion is provided between the second side wall portion of the air cleaner and the vehicle body constituent member forming one side portion of the engine room, together with the resonator chamber forming portion. It is housed in the upper part of the formed space.

Most of the outside air introducing duct and the resonator chamber forming portion having such an arrangement state are located above the wheel house forming portion which extends into the engine room from the side of the vehicle body forming member forming one side of the engine room. Will be distributed. Therefore, in the intake system for a vehicle engine according to the present invention, the space for placement in the engine room is
It will be relatively small, and it will be ensured without being obstructed by the wheel house forming part that extends from the side of the vehicle body forming part that forms one side of the engine room into the engine room. It is possible to increase the length of the duct or increase the volume of the resonator chamber formed by the resonator chamber forming portion as desired within a range that does not increase the intake resistance in the outside air introducing duct.

In addition, in the intake system for a vehicle engine according to the present invention, the size of the entire system is reduced, and the outside chamber for introducing the outside air and the resonator chamber forming portion interposed between The intake noise generated by the outside air guided to the air cleaner through the outside air introduction duct is effectively reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an intake system for a vehicle engine according to the present invention, together with an engine to which the intake system is applied.

In FIG. 1, an engine 1 indicated by a one-dot chain line is vertically arranged at a substantially central portion in an engine room 3 provided in a vehicle. An intake manifold 4 is provided on the right side surface of the engine body 1a, and the intake manifold 4 has a position facing the left side surface of the engine body 1a on the left side in the engine room 3 through the intake duct 5. The installed air cleaner 6 is connected. The intake duct 5 extends from the intake manifold 4 past the front of the engine body 1a and reaches the upper portion of the air cleaner 6.

The air cleaner 6 arranged on the left side in the engine room 3 is supported by a frame member 8 extending below the air cleaner 6 in the vehicle front-rear direction, as shown in FIG. The air cleaner 6 is adjacent to the left side wall portion 6L and the right side wall portion 6R and the left side wall portion 6L and the right side wall portion 6R that face each other in the vehicle body left-right direction, and are adjacent to each other in the vehicle body front-rear direction. Has a front side wall portion 6F and a rear side wall portion 6B facing each other.

An outside air introducing duct 14 having a downstream side portion 10, an intermediate portion 11 and an upstream side portion 12 is connected to a rear side wall portion 6B of the air cleaner 6. As shown in FIG. 2, one end of the downstream portion 10 of the outside air introduction duct 14 is connected to a lower portion of the rear side wall portion 6B of the air cleaner 6, and the other end of the downstream portion 10 extends upward. Intermediate part 11 in the outside air introduction duct 14
Is connected to one end. The air cleaner 6 has a built-in filter element, and cleans the intake air, which is the outside air supplied through the outside air introduction duct 14, by passing through the filter element, and purifies the intake air through the intake duct 5 into the intake air in the engine body 1 a. Supply to the manifold 4.

Intermediate portion 11 in the outside air introducing duct 14
Is bent and extended from the downstream side portion 10 to which one end thereof is connected so as to be close to both the upper portion of the rear side wall portion 6B of the air cleaner 6 and the upper portion of the left side wall portion 6L adjacent to the rear side wall portion 6B. A resonator chamber forming portion 16 is interposed in a portion 11a of the air cleaner 6 that is close to and above the upper portion of the left side wall portion 6L. Further, the intermediate portion 11 of the outside air introduction duct 14 is a portion 11a in which the resonator chamber forming portion 16 is interposed.
In the space between the upper portion of the left side wall portion 6L of the air cleaner 6 and the left side panel 17 that is a vehicle body constituent member that forms one side portion of the engine room 3, the curved portion 11b.
It is assumed that the other end reaches one end of the upstream side portion 12 of the outside air introduction duct 14 through a portion 11c that is folded back in a U shape through the portion 11c and extends substantially parallel to the portion 11a in which the resonator chamber forming portion 16 is interposed. ing.

The upstream portion 1 of the outside air introducing duct 14
2 is a part 1 in the intermediate part 11 to which one end is connected.
Bends from 1c and extends towards the left side panel 17,
Outside air intake 1 whose other end faces the left side panel 17
8 are formed.

Such an outside air introducing duct 14 has a portion 11a, a curved portion 11b, and a curved portion along the upper portion of the left side wall portion 6L of the air cleaner 6 in which the resonator chamber forming portion 16 is interposed in the intermediate portion 11. A portion 11c extending from the portion 11b toward the upstream side portion 12 substantially in parallel with the portion 11a, and the upstream side portion 12 provided with the outside air intake 18 are entirely of the left side wall portion 6L of the air cleaner 6. It is stored in the space between the upper part and the left side panel 17.

The portion 11c of the intermediate portion 11
Has a flat hollow cross section with a dimension in the left-right direction smaller than the dimension in the up-down direction, and is a space between the upper portion of the left side wall portion 6L of the air cleaner 6 and the left side panel 17. It is designed to be easily stored in. Further, since the portion 11c of the intermediate portion 11 has such a flat hollow cross section, the space between the outside air intake port 18 provided in the upstream side portion 12 of the outside air introduction duct 14 and the left side panel 17 is separated. The distance is made relatively large so that a sufficient flow of outside air is formed between the portion 11c and the left side panel 17.

Further, in the intermediate portion 11 of the outside air introducing duct 14, the portion 11a in which the resonator chamber forming portion 16 is interposed, the curved portion 11b, and the curved portion 11b extend from the curved portion 11b toward the upstream portion 12 substantially in parallel with the portion 11a. The portion 11c and the upstream portion 12 of the outside air introduction duct 14 where the outside air intake 18 is provided are arranged above the wheel house forming portion 20 that extends into the engine room 3 from the left side panel 17 side. Then, as shown in FIG. 3, the bracket 21 protruding from the curved portion 11 b connecting the portion 11 a and the portion 11 c in the intermediate portion 11 of the outside air introduction duct 14 is located above the wheel house forming portion 20 by the fastening member 22. Provided support member 2
The bracket 23 protruding from the upstream side portion 12 of the outside air introducing duct 14 is fastened to the fastening member 24.
Thus, the intermediate portion 11 and the upstream side portion 12 together with the resonator chamber forming portion 16 in the outside air introduction duct 14 are fastened to the support member 26 arranged above the wheel house forming portion 20 of the wheel house forming portion 20. Fixed above. In addition, the intermediate portion 11 of the outside air introduction duct 14 with the resonator chamber forming portion 16 has a height that is generally lower from the vehicle body rear side to the vehicle body front side along the shape of the bonnet 2 that opens and closes the engine room 3. It is supposed to be.

As shown in FIG. 3, the resonator chamber forming portion 16 is formed of a pair of halves 28 and 29 each of which has a semi-cylindrical shape as a whole, and has a columnar appearance which extends in the vehicle longitudinal direction as a whole. And is arranged so as to be substantially parallel to the air cleaner 6. Half 28
A circling flange portion 28a is provided on the half body 29, and a circling flange portion 29a is also provided on the half body 29. Then, the circumferential flange portion 28a provided on the half body 28 and the circumferential flange portion 29a provided on the half body 29 are joined together so that the half body 28 and the half body 29 are brought into contact with each other. The resonator chamber is formed inside the halves 28 and 29 by mutually connecting with the circumferential flange portion 29a.

The resonator chamber forming portion 16 which forms the resonator chamber inside has a larger inner diameter dimension and cross-sectional area than the portion 11a in the intermediate portion 11 of the outside air introducing duct 14 in which the resonator chamber forming portion 16 is interposed, The resonator chamber has a relatively large volume. In this way, by the resonator chamber formed inside the resonator chamber forming portion 16, it is taken in from the outside air intake 18 provided in the upstream side portion 12, and the upstream side portion 12, the intermediate portion 11 and the downstream side portion 10 are removed. The intake noise generated by the outside air guided to the air cleaner 6 through the outside air introduction duct 14 provided therein is extremely effectively reduced.

The interconnected circumferential flange portions 28a and 29a in the resonator chamber forming portion 16 are shown in FIG.
As shown in FIG.
A portion 1 of the intermediate portion 11 of the intermediate portion 11 in which the resonator chamber forming portion 16 is interposed is folded back into a U shape through the curved portion 11b and reaches the upstream portion 12.
It is arranged so as to be placed close to 1c. Thereby, in the engine room 3, the flow of the air heated by the operation of the engine 1 or the like toward the outside air intake port 18 provided in the upstream side portion 12 of the outside air introduction duct 14 is generated by the resonator chamber forming portion 16. The intake of the heated outside air to the outside air introduction duct 14 through the outside air intake 18 is restricted by the mutually connected circumferential flange portions 28a and 29a.

As described above, the outside air introducing duct 14 connected to the air cleaner 6 arranged on the left side in the engine room 3 is connected to the lower portion of the rear side wall portion 6B of the air cleaner 6, and from the lower portion thereof. Downstream portion 1 extending upward and connected to the intermediate portion 11
0, the upstream side portion 12 provided with the outside air intake 18 opposed to the left side panel 17, and between the downstream side portion 10 and the upstream side portion 12, and the rear side wall of the air cleaner 6 from the downstream side portion 10 The space between the left side wall portion 6L of the air cleaner and the left side panel 17 is bent and extended so as to be close to both the upper portion of the portion 6B and the upper portion of the left side wall portion 6L adjacent to the rear side wall portion 6B. At the intermediate portion 11 that reaches the upstream side portion 12 by folding back into a U shape
By including the resonator chamber forming portion 16 disposed substantially parallel to the air cleaner 6 by being interposed in the intermediate portion 11 that is close to the left side wall portion 6L of the air cleaner 6, In the engine room 3, most of the outside air introducing duct 14 except the downstream side portion 10 and the resonator chamber forming portion 16 provided therein are located above the wheel house forming portion 20 between the air cleaner 6 and the left side panel 17. It is conveniently stored in the space that is formed.

Further, the outside air introducing duct 14 can be easily made to have a desired effective intake passage length over the entire length thereof within a range that does not increase the intake resistance, and the resonator chamber forming portion. 16 makes it easy to make the resonator chamber formed thereby to have a desired volume, so that the outside air introduced into the outside air intake duct 18 to the air cleaner 6 through the outside air introduction duct 14. The reduction of the intake sound generated by
It will be easy to obtain a very effective state.

Further, the intermediate portion 11 with the resonator chamber forming portion 16 in the outside air introducing duct 14, the brackets 21 and 23 protruding therefrom, and the fastening member 22.
And 24, the support members 25 and 26 arranged above the wheel house forming portion 20 are fastened and supported, respectively, so that the entire structure has a flexible structure. The resulting vibration is effectively absorbed.

[0028]

As is apparent from the above description, in the intake system for a vehicle engine according to the present invention, most of the outside air introduction duct except the downstream side portion connected to the first side wall portion of the air cleaner. However, in the space formed between the second side wall portion adjacent to the first side wall portion of the air cleaner and the vehicle body constituent member forming one side portion of the engine room together with the resonator chamber forming portion, the engine room Is disposed at a position above the wheel house forming portion that projects into the engine room from the side of the vehicle body forming member that forms one side portion.

Therefore, the intake system for a vehicle engine according to the present invention requires a relatively small space for arrangement in the engine room, and the vehicle body constituent members forming one side of the engine room It is ensured without being hindered by the wheel house forming part that extends into the engine room, and the length of the outside air introducing duct is increased or the volume of the resonator chamber formed by the resonator chamber forming part is increased. , The outside air introduction duct and the intermediate portion thereof are interposed under the condition that the intake air resistance in the outside air introduction duct is not increased and the entire device is downsized. The resonator chamber forming part improves the intake sound generated by the outside air guided to the air cleaner through the outside air introduction duct. It can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an intake device for a vehicle engine according to the present invention, together with an engine to which the intake device is applied.

FIG. 2 is a side view showing a main part of an example of an intake device for a vehicle engine according to the present invention.

FIG. 3 is a front view showing a main part of an example of an intake device for a vehicle engine according to the present invention.

[Explanation of symbols]

 1 Engine 1a Engine Main Body 3 Engine Room 4 Intake Manifold 5 Intake Duct 6 Air Cleaner 10 Downstream Side of Outside Air Introduction Duct 14 11 Intermediate Part of Outside Air Introduction Duct 14 12 Upstream Side of Outside Air Introduction Duct 14 Outside Air Introduction Duct 16 Resonator Chamber Forming part 17 Left side panel 18 Outside air intake 20 Wheel house forming part 28,29 Half of resonator chamber forming part 16 28a, 29a Circular flange part

Claims (7)

[Claims] 1. An air cleaner disposed laterally in an engine room provided in a vehicle and connected to an intake manifold of an engine mounted in the engine room through an intake duct, and a first side wall portion of the air cleaner. A downstream side portion connected to the upstream side portion, an upstream side portion provided with an outside air intake port, and a first side wall portion of the air cleaner arranged between the downstream side portion and the upstream side portion. A vehicle body constituent member that bends and extends so as to be close to both of the second side wall portion adjacent to the first side wall portion and forms a second side wall portion of the air cleaner and one side portion of the engine room. In the space between them, the air introducing duct having an intermediate portion that folds back in a U shape and reaches the upstream side portion, and the air cleaner in the air introducing duct. Is brought interposed the intermediate portion along close to the second side wall portion, an intake device for an engine for a vehicle configured to include a resonator chamber forming portion, a which is disposed in parallel to the air cleaner substantially. 2. A downstream side portion of the outside air introducing duct is connected to a lower portion of the first side wall portion of the air cleaner, extends upward from the lower portion and is connected to an intermediate portion of the outside air introducing duct. The intake system for a vehicle engine according to claim 1. 3. An upstream side portion of the outside air introduction duct is arranged at a position where an outside air intake provided in the upstream side portion faces a vehicle body constituent member forming one side portion of the engine room. The intake system for a vehicle engine according to claim 1 or 2. 4. A portion of the intermediate portion of the outside air introducing duct, which is folded back in a U shape from the portion where the resonator chamber forming portion is interposed and reaches the upstream side portion, has a vertical dimension with respect to a horizontal dimension. The intake system for a vehicle engine according to claim 1, wherein the intake system has a flattened hollow cross section. 5. A portion of the intermediate portion of the outside air introducing duct, which is folded back in a U-shape in the vicinity of the second side wall portion of the air cleaner, is located above a wheel house projecting into the engine room. The intake system for a vehicle engine according to any one of claims 1 to 4. 6. A resonator chamber forming portion is constituted by first and second halves forming a chamber by mutually connecting flange portions in each, and in each of the first and second halves. A lower portion of the mutually connected flange portion is U from a portion of the intermediate portion of the outside air introduction duct where the resonator chamber forming portion is interposed.
The intake device for a vehicle engine according to claim 5, wherein the intake device for a vehicle engine is arranged at a position that is close to a portion that is folded back in a letter shape and reaches an upstream side portion. 7. The intake system for a vehicle engine according to claim 1, wherein an intake manifold of the engine is arranged at a position facing the air cleaner with the main body of the engine interposed therebetween.