JPH08144876A - Air filter mounting structure of engine for vehicle - Google Patents

Abstract

PURPOSE: To easily completely discharge dust or the like removed from a filter element from a filter case by separating a cap part from a filter part to form an opening part in the center of a filter plate. CONSTITUTION: A cleaner box 43 is provided with an air filter 44. Air is cleaned in the air filter 44 to be introduced into the cleaner box 43 in an air cleaner 25 of an engine for a vehicle. The air filter 44 is composed of a filter section 49 provided with a filter case 51 provided therein with a filter element and a filter plate 52 for closing the case 51 and provided in the center with an opening part 56 and a cap section 50 provided with an inlet guide 64. The inlet guide 64 of the cap section 50 is inserted into the opening part 56 so that a filter cap 63 is mounted removably to the filter plate 52 which is mounted removably to the cleaner box 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle engine air filter mounting structure.

[0002]

2. Description of the Related Art A large amount of air is required for an engine to operate. This air contains various foreign substances such as dust, and if it is sent to the engine as it is, the foreign substances act as an abrasive and cause the cylinder and piston to wear. Further, the foreign matter also mixes with the lubricating oil, which causes wear of the rotating portion. Therefore, an air cleaner is provided in the intake system to remove foreign matter in the air.

An air cleaner is provided with a cleaner box in the middle of an air suction path, and an air filter made of foamed polyurethane or filter paper is housed in the cleaner box so that foreign substances are removed when the air passes through the air filter. ing. Then, the purified air is sent to a carburetor or the like through a duct-shaped outlet tube, for example.

FIG. 11 is a sectional view of a conventional air cleaner 1. The air cleaner 1 mainly includes a cleaner box 2.
And a tubular air filter 3 having a bottom and a duct-shaped outlet tube 4. The upstream side of the outlet tube 4 is attached to the cleaner box 2, and the downstream side is connected to a carburetor (not shown). The air filter 3 is also attached to the hole 5 provided in the cleaner box 2 and accommodated therein.

FIG. 12 is a plan view of a conventional air filter 3, and FIG. 13 is a sectional view taken along line XIII-XIII of FIG. As shown in FIGS. 12 and 13, the air filter 3 mainly includes a filter case 6 and a filter plate 7.
, A lower plate 8, an inlet guide 9, and a filter element 10. The filter case 6 includes a net-shaped outer cylinder 6a and an inner cylinder 6b,
The lower part thereof is closed by a lower plate 8. A filter element 10 made of filter paper folded in a bellows shape is interposed between the outer cylinder 6a and the inner cylinder 6b. Furthermore, a disk-shaped filter plate 7 is fixedly attached to the upper portion of the filter case 6 to close it. On the other hand, a cylindrical inlet guide 9 is provided at the center of the filter plate 7.
Is inserted. Further, at the outer peripheral portion of the filter plate 7, there are formed, for example, four air filter mounting flanges 12 having screw holes 11 for mounting the filter portion to the cleaner box 2. The upstream side of the filter element 10 in the cleaner box 2 is generally called the dust side 13, and the downstream side is generally called the clean side 14.

[0006]

However, with the passage of time, much dust and the like adhere to the filter element, causing clogging. Therefore, for example, a filter element made of filter paper is regularly tapped on this filter element, or compressed air is blown from the clean side to remove dust and the like. It is very difficult to remove the removed dust and the like from the filter case, and most of the dust remains in the filter case. If the air filter is reused with dust or the like remaining in the filter case, the dust or the like will reattach to the filter element, and the function of the filter element will be deteriorated. In the end, the air filter having such a structure has a cost only because it can only be replaced regularly and frequently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air filter mounting structure for a vehicle engine which can easily discharge dust and the like in the filter case.

[0008]

In order to solve the above-mentioned problems, an air filter mounting structure for a vehicle engine according to the present invention is provided with an air filter in a cleaner box as described in claim 1, and An air cleaner for a vehicle engine in which air is purified by an air filter and introduced into the cleaner box, wherein the air filter has a filter case containing a filter element and the filter case is closed and has an opening at its center. A filter portion having a filter plate, and a cap portion having a filter cap and an inlet guide inserted through the center of the filter cap,
The inlet guide is inserted into the opening, the filter cap is detachably attached to the filter plate, and the filter plate is detachably attached to the cleaner box.

[0009]

In the present invention having the above-mentioned structure, the air filter is provided in the cleaner box, and the air filter of the vehicle engine air cleaner in which air is purified by the air filter and introduced into the cleaner box is A filter case containing a filter element and a filter section having a filter plate that closes the filter case and has an opening at the center thereof; and a cap section having a filter cap and an inlet guide inserted through the center of the filter cap. Consisting of
Since the inlet guide is inserted into the opening and the filter cap is detachably attached to the filter plate, and the filter plate is detachably attached to the cleaner box, the cap portion and the filter portion are separated from each other. Moreover, since an opening is formed in the center of the filter plate, dust and the like removed from the filter element can be easily and completely discharged from the filter case.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view of a motorcycle showing an example of a vehicle to which the present invention is applied. In FIG. 1, the motorcycle 20 has a vehicle body frame 21, and an engine 22 is mounted on the lower front portion of the vehicle body frame 21. An exhaust pipe 23 that constitutes an engine exhaust system is connected to the front side of the engine 22, and a muffler (not shown) is connected to the exhaust pipe 23. Further, on the rear side of the engine 22, a carburetor 2 that constitutes an engine intake system
4 is connected, and an air cleaner 25 constituting another engine intake system is connected to the upstream side of the carburetor 24.

The body frame 21 is, for example, of a twin tube type, and is expanded rightward and leftward mainly immediately after the head pipe 26 provided in front of the body frame 21,
A pair of left and right main frames 27 that extend obliquely rearward in parallel with each other and fold downward in the middle, and extend obliquely downward from the lower rear portion of the head pipe 26, and then bend in the middle and extend rearward. A down tube 28 connected to the end of the main frame 27, and a pair of left and right seat rails 29 extending obliquely upward and rearward from near the rear of the main frame 27. A fuel tank 30 is installed on the main frame 27, and an operation seat 31 is installed on the seat rail 29.

The head pipe 26 has a steering mechanism 3
Two are provided. The steering mechanism 32 is provided with a front fork 34 that rotatably supports the front wheels 33. Further, a handlebar 35, a front fender 36, and the like are attached to the steering mechanism 32, and the steering mechanism 32 is pivotally attached to the front fork 34 so as to be rotatable left and right.

On the other hand, a pivot shaft 37 is installed on the lower rear portion of the main frame 27. A swing arm 38 is pivotally attached to the pivot shaft 37 so as to swing around the pivot shaft 37, and a rear wheel 39 is rotatably supported at the rear end of the swing arm 38.

FIG. 2 is an enlarged side view of the motorcycle 20 around the air cleaner 25. As shown in FIG. 2, the air cleaner 25 is attached to the air cleaner mounting bracket 40 provided on the seat rail 29 by, for example, a bolt 41.
Fixed at. A battery 42 is arranged behind the air cleaner 25.

FIG. 3 is a vertical sectional view of the air cleaner 25. The air cleaner 25 has a function of removing foreign matters in the air sucked into the engine 22 and a function of reducing air suction noise of the engine 22. As shown in FIG. 3, the air cleaner 25 mainly has a cleaner box 43 and a bottomed bottom. It is composed of a cylindrical air filter 44 and a duct-shaped outlet tube 45. The upstream side of the outlet tube 45 is attached to the cleaner box 43, and the downstream side thereof is connected to the carburetor 24. The air filter 44 is also attached to the hole 46 provided in the cleaner box 43 and accommodated therein. Reference numeral 47 is a breather hose, and reference numeral 48 is a drain hose.

The air filter 44 is mainly composed of a filter section 49.
And a cap portion 50. FIG. 4 is a plan view of the filter unit 49 as seen from the X direction in FIG.
FIG. 5 is a sectional view taken along the line VV of FIG. 6 is a plan view of the cap portion 50 as viewed from the X direction in FIG. 3, and FIG. 7 is a sectional view taken along the line VII-VII of FIG.

As shown in FIGS. 4 and 5, the filter portion 49 mainly includes a filter case 51, a filter plate 52, a lower plate 53, and a filter element 5.
4 and a pre-filter 55. The filter case 51 includes a net-shaped outer cylinder 51a and an inner cylinder 51b, and the lower portion thereof is closed by a lower plate 53.
A filter element 54 formed of a filter paper or the like folded in a bellows shape is interposed between the outer cylinder 51a and the inner cylinder 51b, and, for example, foamed polyurethane impregnated with oil is formed inside the inner cylinder 51b. The pre-filter 55 is rolled into a cylindrical shape and attached.

The upper portion of the filter case 51 is closed by a disc-shaped filter plate 52. Filter plate 5
An opening 56 having a diameter that allows the pre-filter 55 to be freely inserted and removed is formed in the center of 2. In addition, the filter plate 5
A filter part 49 is provided on the outer peripheral part of the cleaner box 43.
For example, four air filter mounting flanges 58 having screw holes 57 are formed at four positions. Further, cap portion attaching flanges 60 having screw holes 59 for attaching the cap portion 50 to the filter portion 49 are formed adjacent to the air filter attaching flanges 58, for example, at four places.

As shown in FIG. 5, the air filter mounting flange 58 and the cap portion mounting flange 60 are arranged so that the air filter mounting flange 58 is closer to the cleaner box 43. Further, this separation distance is determined by the cap portion 50 described later and the filter portion 4
The height of the head of the screw 61 attached to 9 is not less than the height. Reference numeral 62 is a gasket.

As shown in FIGS. 6 and 7, the cap portion 50 mainly comprises a filter cap 63 and an inlet guide 64. Disc-shaped filter cap 63
A cylindrical inlet guide 64 having a trumpet-shaped opening is inserted in the center. The outer diameter of the inlet guide 64 is set to be smaller than the inner diameter of the pre-filter 55 which is rolled into a cylindrical shape. Further, the filter cap mounting flanges 66 having screw holes 65 for mounting the filter parts 49 to the cap part 50 are provided on the outer peripheral part of the filter cap 63 in the same number at positions corresponding to the cap part mounting flanges 60,
That is, four places are formed. Furthermore, these screw holes 6
Nuts 67 are welded to the upper surface of FIG.

In FIG. 8, the cap portion 50 is replaced with the filter portion 49.
FIG. 9 is a plan view of the air filter 44 in the state of being mounted on the vehicle from the direction of the arrow X in FIG. 3, and FIG.
It is sectional drawing which follows the line. FIG. 10 is a plan view of the air cleaner 25 with the air filter 44 attached to the cleaner box 43 as seen from the direction X in FIG.

As shown in FIGS. 8 and 9, when the cap portion 50 is mounted on the filter portion 49, the filter cap 63 is placed on the filter plate 52, and the screw hole 65 of the filter portion mounting flange 66 and the cap portion. Align with the screw hole 59 of the mounting flange 60. And screw 61
Is inserted from below in FIG. 9 and screwed to the nut 67.

When the air filter 44 with the cap portion 50 attached to the filter portion 49 is attached to the cleaner box 43, as shown in FIG.
Through the hole 46 provided in the cleaner box 43 and rotated, for example, clockwise so that a part of the air filter mounting flange 58, for example, two facing flanges, are attached to the locking member 68 provided around the hole 46. Lock it. Then, the remaining air filter mounting flange 58 is screwed and fixed to the cleaner box 43 with a screw 69. The upstream side of the filter element 54 in the cleaner box 43 is called the dust side DS, and the downstream side is called the clean size CS.

When carrying out maintenance on the air filter 44, first attach the air filter 44 to the cleaner box 43.
The screw 69 fixed to is removed, and the air filter 44 is rotated counterclockwise, for example, and removed from the cleaner box 43. Next, the screw 61 that fixes the cap portion 50 to the filter portion 49 is removed, and the cap portion 50 and the filter portion 49 are separated. Then, the pre-filter 55 is taken out from the opening 56 formed in the center of the filter plate 52, and the pre-filter 55 is washed with oil or the like if necessary. Further, the filter case 51 of the filter unit 49
Of the filter element 54 to remove dust and the like adhering to the filter element 54 by blowing compressed air from the outside, that is, from the clean cylinder CS. Since the opening 56 is formed in the center of the filter plate 52 and the inlet guide 64 is also removed together with the filter cap 63, the removed dust and the like can be easily and completely discharged from the filter case 51. . Therefore, the dust or the like does not reattach to the filter element 54 and the function of the filter element 54 is not deteriorated. Further, by cleaning the inside of the filter case 51, it becomes possible to provide the pre-filter 55 that can be used for a long period of time, so that the pre-filter 55 extends the life of the filter element 54 made of filter paper,
As a result, the air filter 44 does not need to be replaced frequently, and the cost is low.

In the above embodiment, the present invention is applied to the motorcycle 2
Although the example applied to 0 is shown, the invention can be applied to any engine equipped with an air cleaner equipped with an air filter and any vehicle equipped with this engine.

[0027]

As described above, according to the air filter mounting structure for a vehicle engine according to the present invention, the cleaner box is provided with the air filter, and the air filter purifies the air and introduces it into the cleaner box. In the air cleaner for a vehicle engine as described above, the air filter includes a filter case including a filter element, and a filter portion that closes the filter case and has a filter plate having an opening at the center thereof, a filter cap, and the filter. A cap portion having an inlet guide inserted through the center of the cap, the inlet guide being inserted through the opening, the filter cap being removably attached to the filter plate, and the filter plate Cleaner box Since it is detachably attached, the cap portion and the filter portion can be separated, and since an opening is formed in the center of the filter plate, dust and the like removed from the filter element can be easily removed from the filter case. Can also be completely discharged.

[Brief description of drawings]

FIG. 1 is a left side view of a motorcycle as a vehicle showing an embodiment of a vehicle engine air filter mounting structure according to the present invention.

FIG. 2 is an enlarged side view of the motorcycle around the air cleaner.

FIG. 3 is a vertical sectional view of an air cleaner.

FIG. 4 is a plan view of the filter section seen from the X direction in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a plan view of the cap portion as seen from the direction X in FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a plan view of the air filter in a state where the cap portion is attached to the filter portion, as seen from the direction of the arrow X in FIG.

9 is a sectional view taken along line IX-IX in FIG.

10 is a plan view of the air cleaner in a state where the air filter is attached to the cleaner box, as seen from the direction of the arrow X in FIG.

FIG. 11 is a vertical cross-sectional view of a conventional air cleaner.

FIG. 12 is a plan view of a conventional air filter.

13 is a sectional view taken along line XIII-XIII in FIG.

[Explanation of symbols]

 20 Motorcycle 24 Carburetor 25 Air Cleaner 43 Cleaner Box 44 Air Filter 49 Filter Part 50 Cap Part 51 Filter Case 52 Filter Plate 54 Filter Element 55 Pre-filter 56 Filter Plate Opening 58 Air Filter Mounting Flange 60 Cap Mounting Flange 63 Filter Cap 64 inlet guide 66 filter mounting flange 67 nut

Claims (1)

[Claims] 1. An air cleaner for a vehicle engine in which an air filter is provided in a cleaner box and the air is purified by the air filter and introduced into the cleaner box. A filter case in which the air filter is incorporated in the air cleaner. And a filter portion that closes the filter case and that includes a filter plate that has an opening in the center thereof, and a cap portion that includes a filter cap and an inlet guide that is inserted through the center of the filter cap. Is inserted through the opening, the filter cap is detachably attached to the filter plate, and the filter plate is detachably attached to the cleaner box.