JPH09268953A - Intake structure of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the straight line part of the end side of an outlet hose by arranging a part of throttle member for restricting the intake rate of a throttle body side arranged in the outlet hose of an air cleaner by folding it with a body side connecting part. SOLUTION: In an air cleaner outlet hose 10 arranged between an air cleaner and a throttle body 6, an end part opposite to an air cleaner connecting side is connected to the body side connecting part 14 of the throttle body 6. In the body side connecting part 14, the inner surface thereof is formed on a taper surface 20, and also a top end projection part 22 and a hose fitting surface 24 are formed on the outer surface thereof. A hose stopper 26 is protuberantly arranged on the referential end side of the outer surface. A part of a rubber made annular throttle member 28 for restricting the intake rate of the throttle body 6 side is folded and fitted to the body side connecting part 14, and thereby, a straight line part 36 having a length L shorter than that of a prior arts formed on the other end side of the hose 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake structure of an internal combustion engine, and more particularly to an intake structure of an internal combustion engine in which a throttle member can be installed at a throttle body side end portion of an air cleaner outlet hose while ensuring a necessary clearance. Regarding the structure.

[0002]

2. Description of the Related Art In the intake structure of an internal combustion engine of a vehicle,
In order to guide the intake air from the air cleaner to the throttle body, an air cleaner outlet hose is provided, and in this air cleaner outlet hose, there is a throttle member that restricts the intake amount to the throttle body side.

That is, as shown in FIG. 5, the air cleaner outlet hose 102 has one end connected to a cleaner-side connecting portion (not shown) of the air cleaner and the other end connected to a body-side connecting portion 106 of the throttle body 104. Has been done.

On the inner surface on the other end side of the air cleaner outlet hose 102, a rubber-made annular throttle member 108 is provided so as to regulate the amount of intake air to the throttle body 104 side. The diaphragm member 108 is formed to have a thickness B1.

Therefore, on the other end side of the air cleaner outlet hose 108, the first straight line portion 110 corresponding to the thickness B1 of the throttle member 108 is taken into consideration, and the length B2 fitted to the body side connecting portion 106 is taken into consideration. Second straight portion 11
Considering 2 as well, the total straight line portion 114 having the length B3 is formed.

[0006]

However, in the conventional intake structure, since the other end side of the air cleaner outlet hose needs a total straight line portion of at least length B3, it is installed in the vicinity of the air cleaner outlet hose in terms of layout. It was not possible to secure the necessary clearance with the master hood brake hood tank (not shown).

Further, when the adhesion between the air cleaner outlet hose and the rubber diaphragm member is incomplete, there is a problem that the diaphragm member moves or rotates.

[0008]

Therefore, according to the present invention, in order to eliminate the above-mentioned inconvenience, one end side is connected to the cleaner side connecting portion of the air cleaner and the other end side is connected to the body side connecting portion of the throttle body. In the intake structure of an internal combustion engine, an air cleaner outlet hose is provided, and a throttle member for restricting an intake amount to the throttle body side is provided in the air cleaner outlet hose, and a part of the throttle member is connected to the body side connecting portion. It is characterized by being provided by polymerization.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, since a part of the throttle member is superposed on the body side connecting portion, the straight portion on the other end side of the air cleaner outlet hose can be shortened, whereby the master bag can be shortened. The throttle member can be provided on the air cleaner outlet hose while ensuring a necessary clearance with the brake hood tank of FIG.

Further, since the throttle member partially overlaps with the body-side connecting portion, its position is restricted with respect to the throttle body. As a result, it is possible to prevent the diaphragm member from moving or rotating.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 to 4 show an embodiment of the present invention. In FIG. 2, 2 is an internal combustion engine, 4 is an intake manifold, 6 is a throttle body, and 8 is an air cleaner.

An air cleaner outlet hose 10 is provided between the air cleaner 8 and the throttle body 6. The air cleaner outlet hose 10 has one end connected to the cleaner-side connecting portion 12 of the air cleaner 8 and the other end connected to the body-side connecting portion 14 of the throttle body 6.

This air cleaner outlet hose 10
An intake air temperature sensor 16 and a blow-by gas inlet pipe 18 are provided in the.

As shown in FIG. 1, the body side connecting portion 14 of the throttle body 6 has an inner surface formed as a taper surface 20, and an outer surface having a tip projection 22 on the tip side and a hose fitting surface 24. Is formed, and a hose stopper 26 is formed on the base end side so as to project outward.

The body-side connecting portion 14 is provided with a part of the throttle member 28 that regulates the amount of intake air to the throttle body 6 side.

As shown in FIGS. 3 and 4, the throttle member 28 is made of an annular rubber and has a thickness H1 and an outer diameter D.
1, a step 30 is formed from the one end surface 28a to a thickness H2, and an outer diameter D2 is formed from the step 30 to the other end surface 28b side, while the other end surface 28b has an outer diameter D3. In addition, the intake hole 32 is formed in the inner diameter D4.

As a result, the diaphragm member 28 has one end face 2
A lip portion 34 is formed on the 8a side, and a taper portion 36 is formed continuously with the lip portion 34. Lip part 3
4 is provided in contact with the inner surface on the other end side of the air cleaner outlet hose 10. The taper portion 36 is
It is provided in contact with the tapered surface 20 of the body-side connecting portion 14.

Therefore, as shown in FIG. 1, the other end side of the air cleaner outlet hose 10 only needs to have a straight portion 38 having a length L which is considerably shorter than the conventional length B3.

As shown in FIG. 2, a brake hood tank 42 of the master bag 40 and a master cylinder 44 are arranged near the air cleaner outlet hose 10.

Next, the operation of this embodiment will be described.

In the body-side connecting portion 14, the tapered portion 36 of the throttle member 28 is press-fitted into the tapered surface 20, and the air cleaner outlet hose 10 is fitted into the hose fitting surface 24.
The linear portion 38 on the other end side is fitted.

At this time, in the throttle member 28, the lip portion 34 is pressed against the inner surface of the air cleaner outlet hose 10, the step 30 is locked to the tip of the body side connecting portion 14, and the taper portion 36 is tapered. The surface 20 is strongly pressed.

Therefore, the position of the diaphragm member 28 is regulated with respect to the throttle body 6 by the lip portion 34 and the taper portion 36.

In the throttle member 28, the lip portion 34 is adhered to the inner surface of the air cleaner outlet hose 10 with an adhesive (not shown), or the tapered portion 36 is adhered to the tapered surface 20 of the body side connecting portion 14. (Not shown)
Glued by

As a result, since the straight portion 38 on the other end side of the air cleaner outlet hose 10 can be made considerably shorter than before, as shown in FIG. 2, a necessary clearance C is secured with the brake tank 42 of the master bag 40 and the like. You can

Further, since the diaphragm member 28 is formed with the lip portion 34 and the taper portion 36, its position is restricted with respect to the throttle body 6, and the diaphragm member 28 moves.
The risk of rotation etc. can be prevented.

Further, since the lip portion 34 or the tapered portion 36 of the throttle member 28 is adhered to the inner surface of the air cleaner outlet hose 10 or the tapered surface 20 with an adhesive, the throttle member 28 can be more firmly fixed.

[0028]

As is apparent from the above detailed description, according to the present invention, a linear portion on the other end side of the air cleaner outlet hose is formed by superposing a part of the throttle member on the body side connecting portion. The length can be shortened, and thus, the required clearance can be secured with the brake hood tank of the master bag or the like.

Further, since the position of the diaphragm member is restricted with respect to the throttle body, it is possible to prevent the diaphragm member from moving or rotating.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an intake structure.

FIG. 2 is a plan view of an intake structure.

FIG. 3 is a front view of a diaphragm member.

FIG. 4 is a bottom view of the diaphragm member.

FIG. 5 is an enlarged cross-sectional view of a conventional intake structure.

[Explanation of symbols]

 2 Internal combustion engine 6 Throttle body 8 Air cleaner 10 Air cleaner outlet hose 12 Cleaner side connection part 14 Body side connection part 28 Throttling member 34 Lip part 36 Tapered part

Claims (3)

[Claims] 1. An air cleaner outlet hose, one end of which is connected to a cleaner-side connecting portion of an air cleaner and the other end of which is connected to a body-side connecting portion of a throttle body, wherein the air cleaner outlet hose is connected to the throttle body side. In the intake structure for an internal combustion engine, which is provided with a throttle member for restricting the intake amount, the intake structure for an internal combustion engine, wherein a part of the throttle member is provided so as to overlap with the body-side connecting portion. 2. The throttle member has a lip portion that overlaps with an inner surface of the air cleaner outlet hose and a taper portion that overlaps with an inner surface of the body-side connecting portion so as to regulate a position with respect to the throttle body. The intake structure for an internal combustion engine according to claim 1, wherein: 3. The throttle member according to claim 2, wherein the lip portion is adhered to an inner surface of the air cleaner outlet hose, or the taper portion is adhered to an inner surface of the body-side connecting portion. An intake structure for an internal combustion engine as described.