JPS5970867A - Air cleaner for auto-bicycle - Google Patents

Abstract

PURPOSE:To produce an air-cleaner which can suck slow air flow by covering an inside element composed of filter material with an outside element where filter material is used at a portion of box. CONSTITUTION:A rubber coupling tube 2 conducted to engine suction port and a supporting frame 4 of an inside element 3 are fastened by a bolt 4a at the opening at one side of box 1 of outside element or air-cleaner. The box 1 is molded with synthetic resin and a filter member 5a is fixed at the suction port 5. The inside element 3 will cover the vents 4b, 4b and fixed dismountably through a fixing member 7. The inside element 3 is comprised of synthetic resin aggregate 3a, filter member 3b fixed around said aggregate 3a and end face seals 3c, 3d. With such structure, even when travelling wind is applied transiently onto the outside of box 1, it is layered when passing through the filter member 5a to prevent variation of air/fuel ratio of mixed gas.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air cleaner particularly suitable for use in motorcycles, and an object of the present invention is to construct the air cleaner so that it can draw in outside air from as wide a range as possible around the air cleaner.

Conventionally, air cleaners for automobiles and motorcycles cover the outer periphery of the element leading to the engine intake port with a box made of iron or synthetic resin, and one or two cylindrical intakes protrude outward from the outer surface of the box. It is configured to let outside air into the box body through the mouth.

This method is used not only to store the element in a box but also to prevent unnecessary fluctuations in the air-fuel ratio of the air-fuel mixture due to direct action of the wind from the vehicle on the element.

However, in recent vehicles, the space for mounting the engine and its parts has become narrower, and it has become difficult to install one or two intake ports. Since there are only a limited number of directions in which it can be pulled out, this makes design even more difficult.

The present invention was developed to improve this situation, and is characterized by the fact that it includes a box-shaped outer element made of a relatively hard filter material on the outside of the conventional element.

The present invention will be explained below with reference to illustrated embodiments. In the figure, 1 is the box body of the air cleaner which is the outer element, and the opening on the negative side is the engine intake port (not shown).
The rubber-like connecting pipe 2 communicating with the inner element 3 and the support frame 4 of the inner element 3 are collinear with each other by a port Za implanted in the flange of the peripheral edge of the support frame 4. The box body 1 is made by molding synthetic resin, and a part of the box body 1 is provided with an intake port 5 that communicates the inside and outside, and a filter material 5a is installed in the intake port 5.
In other words, a synthetic resin foam consisting of open cells such as urethane foam is used for installation. The filtering material 5a may be a non-woven fabric, and is particularly preferably treated to repel water. Furthermore, the box body 1, which is the outer element, can be entirely made of a relatively hard foam, that is, a ceramic material with a honeycomb structure. A large ventilation hole 4 is provided in the supporting frame 4.
b.

4b is provided, and an oak 4e is planted in the center. The inner element 3 covers its vents 4b, 4b;
The member 7 is tightened, and the bolt 6 provided thereon is screwed into the bolt 4cK to be removably fixed. Here, the inner element 3 is composed of a synthetic resin aggregate 3a, a filter material 3b1 made of conventionally known paper 1 foam, etc., and end seals 3C and 3d attached to surround the outer periphery of the aggregate 3a. 8 is a drain pipe that protrudes downward from the bottom of the box body 1;
A check valve 8a is attached to the bottom surface of the container, which uses the elasticity of rubber to automatically open due to the weight of water when water accumulates inside.

Since this embodiment is constructed as described above, when the engine is started, atmospheric air is sucked into the box body 1 through the curing material 5a of the outer element due to the intake negative pressure. At this time, even if unsteady running wind is acting on the outside of the box 1, it becomes laminar when it passes through the filtration material 5a, and the influence on the inside of the box 1 is significantly reduced, and the wind blows on the vehicle. This prevents problems such as the air-fuel ratio of the air-fuel mixture changing depending on the driving condition. In addition, relatively large foreign objects such as sand grains and mud lumps can be removed without increasing drag. In this case, even if the filter material 3b is made of a filter material that is denser than the conventional filter material, it has already been filtered by the filter material 5a, so no clogging occurs, and the durability of the engine is further improved. be able to. Furthermore, if the filter medium 5a is made of a water-repellent material, the breathability will not be impaired even if rainwater gets wet. When the air flowing into the box body 1 passes through an inner element 3 made of a filter material 3b similar to that of a conventional air cleaner, fine dust and the like are removed and the air is sucked into the engine. As described above, the present invention provides an air cleaner that communicates with the intake port of an engine with an inner element made of filtration material and an outer element in which a filtration material is used in at least a part of the box provided to cover the periphery of the air cleaner. Since it has a double structure, a gentle airflow can be taken into the inside of the box by the outer element without being affected by the airflow around the air cleaner. Therefore, regardless of the opening direction of the intake port, a stable inflow of intake air is possible. Additionally, since the box body itself is used as the outer element, there is no need for the intake pipe that was conventionally provided in the box body, and the external shape of the air cleaner can be made compact, which greatly simplifies its design. effective.

Note that the present invention does not require that the outer element be a complete box with no openings, but may be configured such that an auxiliary air intake port is provided in a part of the outer element so that air that does not pass through can be taken in from there. 5° which can reduce intake air resistance at maximum engine output and increase output.

[Brief explanation of drawings]

The drawing shows one embodiment of the present invention, and is a partially cutaway side view of an air cleaner. 1... Box of the air cleaner which is the outer element, 2
... Connecting pipe, 3... Inner element, 3b, fist, p charge, 4b, φ, vent, 5... intake port,
5a...Oki Katsugetsu, 7...Tightening is a member.

Claims (4)

[Claims] (1) The air cleaner that communicates with the intake port of the engine is constructed of an inner element made of a filtering material and an outer element formed in a box shape surrounding the inner element and at least a part of which is made of the filtering material. An air cleaner for motorcycles, etc., which has a double structure. (2) An air cleaner for a motorcycle or the like according to claim 1, wherein the outer element is formed of a box-shaped filter material. (3) An air cleaner for a motorcycle or the like as set forth in claim 1 or 2, wherein the outer element is made of a relatively hard material. (4) The outer element is formed into a relatively rigid box shape,
An air cleaner for a motorcycle or the like according to claim 1, wherein a part of the air cleaner is provided with an auxiliary air intake port.