JPH06229338A - Suction system for internal combusion engine - Google Patents

Abstract

PURPOSE: To save materials and a space by taking a pipe fixedly provided on a frame pipe of a vehicle or a vehicle frame as an intake pipe and elastically flexibly connecting it to the other part of an intake device or an internal combustion engine it salt. CONSTITUTION: In a motorcycle having a driving device support link mechanism and having an internal combustion engine 7 provided on a frame of a vehicle so as to be oscillated, a frame pipe 1 of the vehicle is elastically and flexibly connected to an air filter 3 through a bellows-shaped sleeve 2 to form a part of an intake noise damper. The pipe 4 extends from the air filter 3 or the intake noise damper to a carburetor 5 and elastically and flexibly connected to both parts 3, 5 through the bellows-shaped sleeve 6. The frame pipe already forms a part of the intake noise damper, and therefore, a frame member may be doubly used, desired saving of material can be performed, and a required space of the intake device can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake system for an internal combustion engine, which is provided in a frame of a vehicle, particularly a motorcycle, so as to be capable of vibrating.

[0002]

2. Description of the Related Art Up to now, an intake system has formed a device which is fixedly connected to an internal combustion engine. As a result, the material cost becomes high and the required space becomes large. This is because the intake system must not prevent or limit the possibility of vibration of the internal combustion engine with respect to the vehicle frame.

[0003]

It is therefore the underlying or object of the present invention to provide an air intake device which eliminates these drawbacks and saves material and space.

[0004]

In order to solve this problem, according to the present invention, a frame pipe of a vehicle or a pipe fixedly provided on the vehicle frame is configured as an intake pipe, and other parts of the intake device or It is elastically and flexibly connected to the internal combustion engine itself, for example via a bellows sleeve.

[0005]

The frame tube thus already forms part of the intake noise attenuator, so that the existing frame members are in any case doubled and the desired material savings are achieved. The space required for the intake system is also reduced. This is because it is no longer necessary to consider the degree of freedom of movement of the intake pipe, which would otherwise be required by the relative movement of the internal combustion engine. A frame pipe serving as an intake pipe or a fixed pipe additionally attached to the frame is elastically and flexibly connected to the internal combustion engine or other device parts, so that the internal combustion engine and possibly other intake devices The possibility of vibration of the part is guaranteed. The intake device according to the present invention can be used not only for an internal combustion engine of a motorcycle but also for a vehicle having a similar basic structure such as a portable lawnmower.

In motorcycles having a drive support linkage, an air filter has heretofore been fixedly mounted to this support linkage, which increases the unsprung mass and is located in a noise-prone location. The drawback is that it must be mounted and a free space for expansion and contraction of the drive device support link mechanism is required.

According to the invention, these drawbacks are also eliminated by the fact that the air filter is mounted on the vehicle frame and is elastically connected to the trailing part of the intake system, in particular to the carburetor. This makes it possible to use the space around the air filter for other devices, since the degree of freedom of movement need not be taken into account. Of course, the unsprung mass is also reduced, and it becomes possible to install the air filter at a location advantageous for noise.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A vehicle frame tube 1 is elastically and flexibly connected to an air filter 3 via a bellows sleeve 2 and thereby forms part of an intake noise attenuator. Air filter 3
Alternatively, a pipe 4 leads from the intake noise attenuator to a carburetor 5, which is also elastically flexibly connected to both parts 3 and 5 via a bellows sleeve 6. The internal combustion engine 7 has a cylinder 8 which is oscillatably supported by a vehicle frame (not shown) and to which an exhaust gas pipe 9 is connected.

[Brief description of drawings]

FIG. 1 is a side view in which a main part of an intake system for an internal combustion engine according to the present invention is partially cut away.

[Explanation of symbols]

 1 frame tube 2,6 bellows sleeve 3 air filter 5 vaporizer 7 internal combustion engine

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 593224751 Marx Hohomile Austria Graz Schuttrasgangelschutlerse 13 (71) Applicant 593224762 Gerhard Kirtmann Austria Austria Graz Tousertal Gutse 79 (72) Inventor Franz Laimbeck Austria Graz-Tar Wurzdorf 86 (72) Inventor Kristian Weidl Austria Etzgersdorf Ederus Baccha 51 (72) Inventor Marx Hochmile Austria Graz Schutlersgangelschutlerse 13 (72) Inventor Gärhardt Kilmann Austria Graz Tousertal Gutse 79

Claims (2)

[Claims] 1. An internal combustion engine (7) oscillatably provided in a vehicle frame, wherein a vehicle frame pipe (1) or a pipe fixedly provided in the vehicle frame is configured as an intake pipe, Other parts of intake system (3, 5) or internal combustion engine (7)
Characterized in that it is elastically and flexibly coupled to itself,
Intake device for internal combustion engine. 2. A motorcycle having a drive device support link mechanism, wherein an air filter (3) is attached to a vehicle frame and is elastically and flexibly connected to a rear portion of the intake device. The intake device according to claim 1.