JP2000203275A - Intake air device of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obviate an installing space of a new resonance noise eliminator, to simplify a structure, and to reduce cost by communicating one of left/right side frames with an intake port of an engine, communicating the side frames with cross members, and constituting the cross members as a resonance noise eliminator. SOLUTION: Left/right side frames 1, 2 are constituted as a hollow member having a cross section of a rectangular shape, and one end side is used as an intake air passage of an engine. Plural cross members 6, 7 for connecting/ joining both are installed between these left/right side frames 1, 2. An intake air passage side end part of a front cross member 6 is constituted as an intake port 8 of air sucked in the engine, and the inside of the front cross member 6 becomes a blocking-up chamber communicated with the left side frame 1. When air passes by the action of this blocking-up chamber, the blocking-up part inside resonates to attenuate sound energy of a prescribed frequency to reduce an intake air sound of the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resonance silencer used for a vehicle, and more particularly, to a resonance silencer which effectively utilizes a cross member constituting a platform of a vehicle.

[0002]

2. Description of the Related Art An example of a conventional resonance silencer shown in FIG. 3 is known (see Japanese Patent Application Laid-Open No. 9-42087). In this silencer, one of the front and rear sides is opened between the body frame 101 and the floor panel 102 by joining the vehicle body frame 101 having a U-shaped cross section and the floor panel 102 extending in the front-rear direction of the vehicle. A substantially cylindrical hollow portion 103 that is closed on the other side is formed, a partition plate 104 is provided in the hollow portion 103, a closed chamber 105 is formed on the closed side, and an opening 106 of the hollow portion 103 is formed.
A portion of the intake pipe 108 that communicates the intake port 107 with the air intake pipe 108 is brought close to a portion where the closed chamber 105 is formed in the body frame 101, and the intake pipe 108 and the closed chamber 105 are communicated with each other through a hole 109 formed in the close portion. When the air passes through the intake pipe 108, the inside of the closed chamber 105 resonates, thereby attenuating the energy of the sound of a specific frequency and reducing the intake sound of the engine. . Separately from this,
As described in Japanese Patent No. 249914, a bellows-shaped resonance silencer is provided in communication with the intake passage to reduce the intake noise of the engine.

[0003]

By the way, in order to obtain a silencing effect, it is necessary to enlarge the shape of a resonance silencer (hereinafter referred to as a resonator). However, the first conventional example is advantageous in terms of mounting space and the like since a partition plate is mounted inside a vehicle body frame having a U-shaped cross section extending in the front-rear direction of the vehicle to form a relatively large closed chamber as a resonator. Although there is a point, it is necessary to attach a partition plate to the center of the frame by welding or the like in order to form a closed chamber inside the body frame, and furthermore, the closed chamber and the engine intake pipe must be connected by a communication hole. In addition, the structure becomes complicated and causes a cost increase. Further, since the second conventional example uses a separate resonator, there is a problem that it is easy to increase the size of the resonator, but it is necessary to secure a mounting space.

[0004] Accordingly, the present invention provides a method of connecting one side frame of a hollow left and right side frame to an intake port of an engine, and connecting a cross member connecting and connecting the left and right side frames to the side frame, thereby forming a cross member. It is an object of the present invention to provide an intake device for an engine used as a resonator, and to solve the above problems.

In the engine intake system of the present invention, the side members and the cross members forming the platform of the vehicle are effectively used as the intake passage and the resonator as they are, so that there is no need to provide a new member dedicated to the resonator. In addition, since the members constituting the platform of the vehicle are used, a space for mounting a new resonator is not required, and the structure can be simplified and the cost can be significantly reduced.

[0006]

The technical solution taken by the present invention comprises a hollow left and right side frame and a hollow cross member connecting and connecting the left and right side frames, and one of the left and right side frames is connected to the other. An intake device for an engine, which communicates with an intake port of an engine and communicates with the side frame and the cross member, wherein the cross member is configured as a resonance silencer. A hollow front cross member that joins the front ends of the left and right side frames. One of the left and right side frames communicates with an intake port of an engine, and the side frame and the front cross member communicate with each other to resonate the front cross member. An intake device for an engine, wherein the intake device is configured as a silencer. The cross member is an intake device for an engine, wherein an end on a side communicating with an intake port of the engine is configured as an intake port, and the other end is closed by a closing member. Is fixed by a clamp, and the closing member is made of urethane.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a vehicle frame according to the first embodiment. In the drawings, reference numeral 1 denotes a left side frame, 2 denotes a right side frame, and these side frames 1 and 2 are basically formed as hollow members having a rectangular cross section. The vehicle floor can be fixed by appropriate means. The front side of each of the side frames 1 and 2 can be configured to be branched into two as shown in the drawing as needed, and one side of the left and right side frames 1 and 2 (the left side in this example).
Is used as an intake passage for the engine. In the forked portion, one of the two branches is used as an intake passage.

An outlet pipe 3 communicating with the hollow portion 1a of the side frame 1 is attached to an inner wall near the engine of the left side frame 1 used as an intake passage. 5 are connected. A plurality of hollow cross members 6 and 7 for connecting and connecting the side frames 1 and 2 are mounted between the left and right side frames 1 and 2. In this embodiment, the left and right side frames 1, 2
The front cross member 6 that connects and connects the front ends of the left side frame 1 and the inside thereof is connected to each other,
Further, the end of the front cross member 6 on the side of the intake passage is formed as an intake port 8 for taking in air to be taken into the engine. A cap 9 made of rubber, for example, for closing the front cross member 6 is provided at an end of the front cross member 6 opposite to the take-in opening 8.
Is attached by a clamp 10. The cap 9 can be fixed to the front cross member 6 by welding using a metal plate. However, when the cap 9 is fixed with the clamp 10 as described above, the mounting operation of the cap 9 is easy, and Various materials can be used, the effect on rust prevention is high, and the cost is also advantageous.

In the frame constructed as described above, intake to the engine is performed as follows. That is, when the engine is started, air is taken in from the intake port 8 of the front cross member 6, and the air is taken into the intake port 8 of the front cross member 6 → the communicating left side frame 1 → the outlet pipe 3 → the boot 5. Is supplied to the air cleaner 4 of the engine. At this time, since the inside of the front cross member 6 is a closed chamber communicating with the left side frame 1, when the air passes through the intake pipe due to the action of the closed chamber, the inside of the closed section resonates, thereby identifying The sound energy of the frequency is attenuated, and the intake sound of the engine can be reduced.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, urethane 11 is used instead of closing the end of the front cross member 6 with the cap 9.
The volume of the closed chamber can be easily adjusted depending on the amount of the urethane 11 to be injected, and the silencing effect can be further enhanced. The other configuration is the same as that of the first embodiment, and the description thereof is omitted. In each of the above embodiments, the front cross member 6 is used as a member constituting the resonator. However, the present invention is not limited to the front cross member 6, and the same effect can be obtained by using another cross member 7. What you can do is obvious. Moreover, the present invention may be embodied in various other ways without departing from its spirit and essential characteristics.

[0011]

As described above in detail, according to the present invention, one of the hollow left and right side frames communicates with the intake port of the engine, and the side frame and the front cross member communicate with each other. Since it is configured as a resonator, there is no need to provide new members dedicated to the resonator.Furthermore, since the members that make up the platform of the vehicle are used, there is no need to mount a new resonator. Reduction can be achieved. In addition, since the volume of the closed chamber can be easily changed, excellent operational effects such as a resonator having a high sound deadening effect can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle frame constituting a resonator according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a vehicle frame according to another embodiment.

FIG. 3 is a plan view of a conventional resonator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Left side frame 2 Right side frame 3 Outlet pipe 4 Air cleaner 5 Boots 6 Front cross member 7 Cross member 8 Inlet 9 Cap 10 Clamp 11 Urethane

Claims (5)

[Claims] 1. A vehicle according to claim 1, further comprising: a hollow left and right side frame; and a hollow cross member for connecting and connecting the left and right side frames. One of the left and right side frames communicates with an intake port of an engine. An intake device for an engine, wherein the intake member communicates with a member, and the cross member is configured as a resonance silencer. 2. A vehicle according to claim 1, further comprising a hollow left and right side frame, and a hollow front cross member connecting the front ends of the left and right side frames. One of the left and right side frames communicates with an intake port of an engine. An intake device for an engine, wherein the intake member communicates with a cross member, and the front cross member is configured as a resonance silencer. 3. The cross member according to claim 1, wherein an end of the cross member communicating with an intake port of the engine is formed as an intake port, and the other end is closed by a closing member. An intake device for an engine as described. 4. An intake system for an engine according to claim 3, wherein said closing member is a rubber member fixed by a clamp. 5. The intake system according to claim 3, wherein said closing member is made of urethane.