JPH03279664A - Intake device for engine - Google Patents

Abstract

PURPOSE:To facilitate assembly, and to produce a noise damping effect by forming, in the inside of an air cleaner case, a passage whose one end is communicated with an intake pipe and whose other end is opened to the inside of the air cleaner case, and by communicating a resonator with the passage. CONSTITUTION:In the inside of an air cleaner case 4, a passage 6 whose one end is communicated with an intake pipe 5 for introducing outside air and whose other end is opened to the inside of the air cleaner case 4 is formed. A resonator 7 is communicated with the passage 6. Since the size of the intake device 1 is small, it can be easily assembled in a limited space inside the engine room of a vehicle. And also a noise damping effect can be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to an engine intake system, and more particularly to an engine intake system equipped with a resonator that attenuates the noise of intake air.

b. Prior art and its problems Conventionally, there has been an intake device equipped with a resonator to attenuate intake noise of air supplied to an engine.

In general, it is known that the noise damping effect of a resonator is greater as the cross-sectional area through which air flows is smaller.

For this reason, as shown in FIG.
2 or the carburetor 1 of the engine 13.
4 and the air cleaner case 11 may be connected to a pipe 15.

However, the engine room (not shown) of the vehicle in which the engine 13 and the like are installed may have the resonator 1 located at an arbitrary position.
Generally, there was not enough space to place the resonator 10, so conventionally, as shown in Fig. 5, the resonator 10 was coupled to the air cleaner case 11 for direct communication so that it was relatively easy to secure the installation space. I was letting it happen.

However, as described above, although there is an advantage in that the intake device can be easily assembled by directly connecting the resonator 10 to the air cleaner case 11, the intake sound damping effect of the resonator 10 cannot be fully exhibited. .

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an engine intake device that can be easily assembled and that can also provide a resonator with a sufficient intake noise damping effect. shall be.

Means for Solving the C0 Problems In order to achieve the above-mentioned object, the present invention provides an engine intake system in which a resonator is directly attached to an air cleaner case. A passage is formed at the other end opening into the air cleaner case, and the resonator is communicated with the passage.

d. Example Hereinafter, an example of the intake system for an engine according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention.

The intake system 1 of this embodiment has a passage 6 formed in an air cleaner case 4 of an engine 3 of a vehicle 2, one end of which communicates with an intake pipe 5 that introduces outside air, and the other end of which opens into the air cleaner case 4. A resonator 7 is communicated with the passage.

Here, the passage 6 is formed by welding a member 8 having an arcuate cross section so as to surround one side of the air cleaner case 4 .

The resonator 7 has a connection lower a at one end thereof, and the air cleaner case 4 has a connection port 4a in the middle of its passage 6. Thereby, the resonator 7 is directly connected to the air cleaner case 4 by fitting its connecting lower a into the connecting port 4a, and is visually integrated.

Therefore, the intake device 1 of this embodiment is small even though it is equipped with the resonator 7, so it can be easily assembled into the limited space in the engine compartment 9 of the vehicle 2, and the resonator 7 can be easily installed. Although the air cleaner case 7 is directly connected to the air cleaner case 4, a large noise attenuation effect can be exhibited. This is clear from the fact that the cross-sectional area of the passage 6 is sufficiently smaller than the indoor cross-sectional area of the air cleaner case 4, and the resonator 7 is communicated with the passage 6 having this small cross-sectional area. Therefore, in the case of this example,
The same effect can be obtained when the resonator 7 is directly connected to the intake pipe 5 of the air cleaner case 4, etc.

In the above embodiment, the passage 6 is formed using the member 8 having an arcuate cross section, but the present invention is not limited to this.
In short, the passage 6 may be formed in any way as long as it is formed inside the air cleaner case so that one end communicates with the intake pipe and the other end opens into the air cleaner case.

e. As described in detail, according to the engine intake system of the present invention, a passage is formed in the air cleaner case, the end of which communicates with the intake pipe, and the other end of which opens into the air cleaner case. Since the resonator is communicated with the passage, the entire device can be miniaturized, and therefore, it can be easily assembled into a small, limited space in the engine room, and the installation space can be saved. It is also easy to secure. Furthermore, the above configuration can provide a sufficient noise attenuation effect similar to that achieved by directly communicating the resonator with the intake pipe.

[Brief explanation of drawings]

1 to 3 show an embodiment of an engine intake system according to the present invention, FIG. 1 is a diagram showing the vehicle, FIG. 2 is an exploded perspective view of the main parts, and FIG. The figure is a longitudinal cross-sectional view of the
FIGS. 4 and 5 are diagrams showing a conventional engine intake system. DESCRIPTION OF SYMBOLS 1... Intake device, 4... Air cleaner case, 5... Intake pipe, 6... Passage, 7... Resonator.

Claims (1)

[Claims] In an engine intake system in which a resonator is directly attached to an air cleaner case, a passage is formed in the air cleaner case, one end communicating with the intake pipe and the other end opening into the air cleaner case, and the passage is connected to the air cleaner case. An engine intake device characterized by communicating a resonator.