JPH0526123A - Air cleaner structure of engine - Google Patents

Abstract

PURPOSE:To provide an air cleaner structure, in which the cleaner element is hard to be degraded, the maintenance facility is high, and the freedom in designing is high. CONSTITUTION:A first air passage is formed on a part extending from an outside air side opening provided on a lower casing of the upper and lower casings for storing a plate-formed cleaner element, to the lower surface of an element in the lower casing. A second air passage partitioned from the first air passage is formed, which is extended from the upper surface part of the element to an engine side opening provided on the lower casing. Outside air is introduced from the outside air side opening through the first air passage to the element out of the under surface thereof, and the air is supplied from the upper surface of the element to an engine through the second air passage and the engine side opening. There is no possibility for dirts and the like to be accumulated on the element, and maintenance easiness is increased, while freedom in designing the upper casing is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner for purifying outside air introduced into an engine, and more particularly to an air cleaner using a plate-shaped cleaner element.

[0002]

2. Description of the Related Art There is a filter type air cleaner using a plate-like cleaner element for removing dust and the like when introducing outside air into an engine. Conventionally, in such an air cleaner, the cleaner element is received in a pair of upper and lower casings so that the cleaner element is substantially horizontal, that is, the air flows in and out vertically, and the outside air side opening is provided in the upper casing. There is a structure in which an engine side opening is provided in the lower casing, and the outside air is introduced from the outside air side opening to pass through a cleaner element to be purified and supplied to the engine.

[0003]

However, in the above structure, when the outside air is introduced from the upper surface side of the cleaner element, dust and the like are accumulated on the upper surface portion of the cleaner element, and the function is deteriorated. Therefore, replacement is required relatively early. However, there was a problem that it was difficult to discharge water drops once they entered.

On the other hand, there is a structure in which an opening on the outside air side is provided in the lower casing and an opening on the engine side is provided in the upper casing. According to this structure, the outside air is introduced from the lower surface side of the cleaner element, so there is no concern that dust will be accumulated in the cleaner element, but since the engine side intake pipe is connected to the upper casing, replacement of the cleaner element, etc. Not only is maintenance troublesome, but, for example, in a general-purpose engine where an air cleaner is placed on the upper part of the engine and can be seen from the outside, considering the air flow etc. It was difficult to improve the aesthetics because of the lack of freedom.

In view of the above problems of the prior art, a main object of the present invention is to provide an air cleaner structure for an engine, in which the cleaner element is not easily deteriorated, the maintenance is easy, and the degree of freedom in design is high. It is in.

[0006]

According to the present invention, there is provided an air cleaner structure for purifying outside air introduced into an engine, wherein the air cleaner structure is provided in a space defined by a lower casing and an upper casing. The plate-shaped cleaner element received, the first air passage formed in the lower casing from the outside air side opening provided in the lower casing to the lower surface of the cleaner element, and the cleaner element A second air passage that extends from the upper surface to the engine-side opening provided in the lower casing and is partitioned from the first air passage to form a first outside air passage is provided. It is introduced into the cleaner element from its lower surface via an air passage, is purified by the cleaner element, and is cleaned from the upper surface to the second air passage and the engine. Through the opening is achieved by providing an air cleaner structure of an engine and supplying to said engine.

[0007]

According to the above construction, since the outside air is introduced from the lower surface side of the cleaner element, there is no concern that dust or the like will be accumulated in the cleaner element, and the outside air side opening and the engine side opening are provided in the lower casing. Therefore, the upper casing can be easily attached and detached, the cleaner element can be easily replaced, and the flexibility of the upper casing design can be increased.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 and 2 show an air cleaner 1 to which the present invention is applied. FIG. 1 is a side sectional view of the air cleaner 1, and FIG. 2 is a plan sectional view of the air cleaner 1. still,
FIG. 1 is an enlarged view of FIG. 2 taken along line I-I. The air cleaner 1 includes a lower casing 2 held on an upper portion of an engine body (not shown), an upper casing 3 fitted to the lower casing 2, both casings 2,
The cleaner element 4 has a substantially rectangular flat plate shape and is received in the inner space defined by 3.

The upper casing 3 is fastened to the lower casing 2 at its central portion with a butterfly bolt 5 through a through hole 4a in the center of the cleaner element 4.
The cleaner element 4 has a filter 6 and a holder 7 that holds the filter 6 at its peripheral portion. An outward flange 7a is provided on the outer circumference of the holder 7. The flange 7a is sandwiched between the peripheral portions of the casings 2 and 3, and the cleaner element 4 is inserted as described above.
By passing the hinge bolt 5 through the through hole 4a in the center of the cleaner element 4, the cleaner element 4 is held and positioned with respect to both the casings 2 and 3. A seal member 8 is provided between the flange 7a and the peripheral portion of the upper casing 3 to seal the two.

An opening 10 on the outside air side is provided on the bottom surface of the lower casing 2. Then, in the lower casing 2, the outside air side opening 10 and the lower surface 4 of the cleaner element 4 are provided.
A first air passage 11 on the dust side is formed between the first air passage 11 and the air passage b.

On the other hand, between the upper surface 4c of the cleaner element 4 and the upper casing 3, a spacer member 18 is provided to define a clean-side empty chamber 12. Further, in the lower casing 2, the first air passage 11 and the partition wall 2 are provided.
A vacant chamber 13 defined by a is defined. An engine-side opening 14 communicating with a carburetor of an engine (not shown) is provided in a portion of the bottom surface of the lower casing 2 where the empty chamber 13 is located. This empty room 13 and the above empty room 12
Are communicated with each other through vertical through holes 15 provided at the corners of the cleaner element 4, and these vacant chamber 12 and through hole 15
And the second air passage 1 on the clean side by the vacant chamber 13
6 are configured. A seal member 17 similar to the above is provided between the partition wall of the holder 7 provided around the through hole 15 of the cleaner element 4 and the partition wall 2a to seal the two.

When an engine provided with such an air cleaner 1 rotates, outside air is introduced from the outside air side opening 10, enters the cleaner element 4 from the first air passage 11 from its lower surface 4b, and is cleaned and then upper surface 4c. After passing through the space, the air is supplied from the engine side opening 14 to the carburetor of the engine through the space 12, the through hole 15, and the space 13 as the second air passage 16.

In this embodiment, the cleaner element is provided with the through hole as a part of the second air passage at the corner portion thereof, but the cleaner element is provided with the through hole at an arbitrary portion such as the central portion thereof and the lower side thereof is provided. The vacant chamber and the engine side opening may be provided in the corresponding portion of the casing.

[0016]

As is apparent from the above description, according to the engine air cleaner structure of the present invention, the plate-shaped cleaner element is received in the inner space defined by the lower casing and the upper casing, and A first air passage is defined in the lower casing from the outside air side opening provided in the casing to the lower surface of the cleaner element, and further, the first air passage is formed from the upper surface of the cleaner element to the engine side opening provided in the lower casing. A second air passage that is partitioned from the first air passage is formed, and outside air is introduced from the lower surface of the cleaner element into the cleaner element through the first air passage from the opening on the outside air side, and the second air passage and the second air passage from the upper surface. By supplying to the engine through the opening on the engine side, there is no risk of dust etc. accumulating in the cleaner element, and it is not necessary to replace the cleaner element. Maintenance easiness is increased because it is easy, further upper casing is higher degree of freedom in the design since it is not linked to such vaporizer engine. From the above, the effect of the present invention is great.

[Brief description of drawings] [Explanation of symbols]

FIG. 1 is a side sectional view of an air cleaner to which the present invention is applied.

FIG. 2 is a plan sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Lower casing 2a Partition wall 3 Upper casing 4 Cleaner element 4a Through hole 4b Lower surface 4c Upper surface 5 Bow bolt 6 Filter 7 Holder 7a Flange 8 Seal member 10 Outside air side opening 11 First air passage 12, 13 Vacancy 14 Engine Side opening 15 Through hole 16 Second air passage 17 Seal member 18 Spacer member

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[Procedure amendment]

[Submission date] April 23, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side sectional view of an air cleaner to which the present invention is applied.

FIG. 2 is a plan sectional view of FIG.

[Explanation of reference numerals] 1 air cleaner 2 lower casing 2a partition wall 3 upper casing 4 cleaner element 4a through hole 4b lower surface 4c upper surface 5 butterfly bolt 6 filter 7 holder 7a flange 8 seal member 10 outside air side opening 11 first air passage 12, 13 Vacancy 14 Engine Side Opening 15 Through Hole 16 Second Air Passage 17 Sealing Member 18 Spacer Member

Claims (1)

Claim: What is claimed is: 1. An air cleaner structure for purifying outside air introduced into an engine, comprising a plate-like cleaner element received in a chamber defined by a lower casing and an upper casing. And a first air passage formed in the lower casing from the outside air side opening provided in the lower casing to the lower surface of the cleaner element, and provided in the lower casing from the upper surface of the cleaner element. A second air passage that is defined by the first air passage and is defined by the first air passage and reaches the engine-side opening, and the outside air is passed from the outside air-side opening through the first air passage to the cleaner element. To the engine through the second air passage and the engine-side opening. An air cleaner structure of the engine and supplying the.