JP2017025788A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance suction efficiency, to increase output, and to improve fuel economy.SOLUTION: An air cleaner of this invention includes a case having an inside thereof divided into a dirty side chamber and a clean side chamber 35 by a partition wall, an inlet hose 40 provided on the partition wall so as to communicate with the dirty side chamber after passing through the clean side chamber 35, a filter provided on the partition wall so as to purify air flowing from the dirty side chamber to the clean side chamber 35 through the inlet hose 40, an outlet hose 21 having an introduction port 46 opened to the clean side chamber 35, and a straightening member 47 provided on an outer wall of the inlet hose 40 in the clean side chamber 35 and extending toward the introduction port 46 of the outlet hose 21 along the flow of the air flowing into the clean side chamber 35.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an air cleaner for purifying air supplied to an engine such as a motorcycle.

  In general, an air intake system of an engine in a motorcycle or the like is provided with an air cleaner for removing dust in the air supplied to the engine and purifying the air.

  As a conventional air cleaner of this type, for example, as described in Patent Document 1, for the purpose of efficiently purifying air introduced into the case from the side, the air cleaner is provided in the case via an inlet hose. There is known a method in which introduced air is guided to the filter element side while being dispersed in a direction parallel to the filter element by an air flow guide member.

JP 2008-25396 A

  However, since the air cleaner described in Patent Document 1 does not include a mechanism for rectifying the air that has passed through the filter element, it is difficult to improve suction efficiency, and it is difficult to increase output and improve fuel consumption. There's a problem.

  Moreover, since the negative pressure inside the case tends to increase as the engine output increases, there is a problem that it is difficult to suppress deformation and vibration of the inlet hose due to the negative pressure.

  Furthermore, since it is necessary to provide an air flow guide member inside the case, there is a problem that the number of parts increases and causes an increase in cost.

  The present invention has been made to solve the above-described problems, and provides an air cleaner capable of improving suction efficiency, increasing output and improving fuel consumption, and preventing deformation of an inlet hose. With the goal.

  In order to achieve the above-described object, a first air cleaner according to the present invention includes a case in which an interior is divided into a dirty side chamber and a clean side chamber by a partition wall, connected to the case, and passes through the clean side chamber. And an inlet hose provided on the partition wall so as to communicate with the dirty side chamber, and purifying air from the dirty side chamber toward the clean side chamber through the inlet hose. And an outlet hose connected to the case and having an inlet opening in the clean side chamber, and provided in an outer wall portion of the inlet hose in the clean side chamber, passing through the filter and the clean side The outlet hoses so as to follow the flow of air flowing into the chamber. Characterized in that it and a rectifying member which extends toward the inlet.

  As a result, the air flowing into the clean side chamber is easily and smoothly guided to the outlet hose by the rectifying member, so that the intake efficiency can be improved, and the output can be increased and the fuel consumption can be improved. It becomes.

  In addition, since the rigidity of the inlet hose can be increased by attaching the rectifying member to the outer wall of the inlet hose, even if the negative pressure inside the case increases as the engine output increases, the negative pressure increases the inlet hose. The hose can be prevented from being deformed, and vibration can be suppressed.

The second air cleaner of the present invention is characterized in that, in the above-described first air cleaner of the present invention, the rectifying member is formed integrally with the inlet hose.
Thereby, the rigidity of the inlet hose can be further increased, deformation of the inlet hose can be reliably prevented, and vibration can be suppressed.

  The third air cleaner of the present invention is the inlet of the outlet hose in the first or second air cleaner of the present invention described above so that the rectifying member follows the flow of air flowing into the clean side chamber. It is characterized by comprising a plurality of projections extending toward the top.

  Thereby, since the rectification | straightening effect | action in the gathering location of the air near the inlet opening of an outlet hose can be improved, the suction | inhalation efficiency to an outlet hose can be improved more and it can aim at the increase in output and the improvement of a fuel consumption further. .

  According to the present invention, it is possible to improve suction efficiency, increase output and improve fuel consumption, and obtain various excellent effects such as preventing deformation of the inlet hose.

It is a left view which shows the scooter type vehicle carrying the air cleaner which concerns on embodiment of this invention. FIG. 2 is a left side view showing a positional relationship between an air cleaner and a unit swing engine according to an embodiment of the present invention attached to a vehicle body frame of the scooter type vehicle of FIG. 1. It is a perspective view which shows the external appearance of the air cleaner which concerns on embodiment of this invention. It is a perspective view which shows the state which removed the case cover from the state of FIG. It is a perspective view which shows the state which removed the partition wall further from the state of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the case where the air cleaner according to the embodiment of the present invention is mounted on a scooter type vehicle will be described as an example.

  First, a scooter type vehicle 1 equipped with an air cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. Here, FIG. 1 is a left side view showing the scooter type vehicle 1, and FIG. 2 is a left side view showing a positional relationship between an air cleaner attached to the vehicle body frame of the scooter type vehicle 1 and the unit swing engine.

  The scooter type vehicle 1 includes a body frame 2. The vehicle body frame 2 extends downward from a head pipe 3 disposed at the front, and extends downwardly from the middle toward the rear, and extends downward and upward from the rear end of the down tube 4. And a pair of left and right rear frames 5.

  The left and right front forks 6 are supported by the head pipe 3 of the vehicle body frame 2 so as to be able to turn left and right. A front wheel 7 is rotatably supported at the lower portion of the front fork 6, and the front wheel 7 is steered left and right by a handle bar 8.

  The rear frame 5 once rises and then bends in the vicinity of the middle so as to extend substantially horizontally rearward and upward. Around the rear frame 5, an upper frame cover 9 constituting a part of the vehicle body cover is formed integrally with the apron portion 10 and is provided so as to surround the upper portion of the rear frame 5. At the lower part of the upper frame cover 9, a lower side cover 11 is divided into left and right parts.

  An openable operation seat 12 is provided on the upper frame cover 9. An article storage room (not shown) is provided on the lower front side of the operation seat 12, and a rear fender 13 is provided behind the article storage room and below the apron portion 10.

  A unit swing engine 14 is swingably supported on the left side of the center lower part of the body frame 2. The unit swing engine 14 has a front lower engine swing shaft (engine pivot center) 15 fixed to the center lower portion (mounting bracket) of the vehicle body frame 2 via an anti-vibration link 16, and a vertical direction about the engine swing shaft 15. It is provided to swing freely.

  The unit swing engine 14 includes a transmission case 17 that extends from one side of the engine (not shown). A power transmission device (not shown) is housed in the transmission case 17, while a rear end portion of the transmission case 17 is provided. A rear wheel 18 is pivotally supported. The transmission case 17 of the unit swing engine 14 also serves as a swing arm, and a rear cushion unit 19 is stretched up and down between the transmission case 17 and the rear frame 5. The rear wheel 18 is buffered and suspended.

  The unit swing engine 14 is connected with an engine intake system 20 to a cylinder head (not shown) of the engine. The engine intake system 20 includes a carburetor (not shown), and an intake upstream side of the carburetor is connected to an air cleaner 30 via an outlet hose 21. Instead of the carburetor, a throttle body and a fuel injector may be provided. The fuel injector may be provided in a cylinder head of the engine to inject fuel into the intake port.

  Next, the air cleaner 30 according to the embodiment of the present invention will be described in detail with reference to FIGS. 3 is a perspective view showing the appearance of the air cleaner 30, FIG. 4 is a perspective view showing a state where the case cover of the air cleaner 30 is removed, and FIG. 5 shows a state where the case cover and the partition wall of the air cleaner 30 are removed. It is a perspective view.

  An air cleaner 30 according to an embodiment of the present invention is an apparatus for purifying air supplied to the engine, which is provided on an upper part of a swing arm (not shown) behind the engine.

  The air cleaner 30 is installed on the upper surface of the transmission case 17 of the unit swing engine 14 (see FIGS. 1 and 2). The air cleaner 30 includes a substantially box-shaped case 31, and the case 31 is formed by coupling a case main body 32 and a case cover 33 with a partition wall 34 interposed therebetween.

  The air cleaner 30 is installed such that the case main body 32 is located on the inner side in the vehicle body width direction and the case cover 33 is located on the outer side. The inside of the case 31 is clean by the partition wall 34 on the case main body 32 side. It is divided into a side chamber 35 and a dirty side chamber 36 on the case cover 33 side in an airtight manner. As shown in FIG. 4, a circular opening 37 is formed substantially in the center of the partition wall 34, and a filter 38 is provided on the side of the opening 37.

  An intake port is opened on the inner side surface of the case body 32 in the vehicle width direction, and an inlet hose 40 is attached to the intake port. The inlet hose 40 includes a connecting pipe 41 extending so as to cross the clean side chamber 35 in the vehicle body width direction. For example, the connecting pipe 41 is formed in a pipe shape having rigidity and is slightly curved. The upstream end of the connecting pipe 41 is fixed to the case body 32, and the downstream end of the connecting pipe 41 is connected to the opening 37 of the partition wall 34 and communicates with the dirty side chamber 36.

  In addition, the inlet hose 40 includes a suction pipe 42 that is detachably connected to the connecting pipe 41 by a band (not shown) or the like outside the case body 32. The suction pipe 42 is, for example, a bellows shape and has flexibility. The suction pipe 42 is curved upward on the right side of the case main body 32 and then extends to the upper side of the vehicle body frame 2, and the suction port 43 is opened at the upper end thereof.

  On the side surface of the case body 32 on the inner side in the vehicle width direction, an outlet is opened adjacent to the lower side of the intake port. An outlet hose 21 is detachably connected to the outlet by a band (not shown) or the like. Further, one end of a breather tube 44 is connected to the front end portion of the case body 32, and the other end of the breather tube 44 is connected to the cylinder head of the engine.

  As shown in FIG. 5, the upstream end 45 of the outlet hose 21 slightly protrudes into the clean side chamber 35 and is substantially parallel to the connecting pipe 41 of the inlet hose 40. The outer peripheral edge at the tip of the upstream end portion 45 of the outlet hose 21 is widened to form an introduction port 46, and this introduction port 46 is opened in the clean side chamber 35. The downstream end of the outlet hose 21 is connected to the engine cylinder head.

  As shown in FIG. 5, a rectifying member 47 is formed integrally with the connecting pipe 41 on the lower outer wall portion of the connecting pipe 41 of the inlet hose 40. The rectifying member 47 is formed in a corrugated plate shape in accordance with the bending state of the connecting pipe 41. The rectifying member 47 is formed along the vehicle body width direction, which is the extending direction of the connecting pipe 41, and extends toward the upper portion of the outer peripheral edge of the inlet 46 of the outlet hose 21. On the lower surface side of the rectifying member 47, a plurality of protrusions 48 protrude at predetermined intervals along the vehicle body width direction, and a plurality of grooves 49 are formed between the protrusions 48.

  The rectifying member 47 is not limited to the above-described form. For example, the rectifying member 47 is curved in an arc shape in accordance with the outer peripheral edge shape of the introduction port 46, or the curvature of the arc as it approaches the introduction port 46. Various modifications, such as curving so that the radius becomes smaller, are possible.

  In the scooter type vehicle 1 equipped with the air cleaner 30 having the above-described configuration, the air sucked into the inlet hose 40 from the suction port 43 enters the dirty side chamber 36 of the case 31 via the suction pipe 42 and the connection pipe 41. be introduced.

  The air introduced into the dirty side chamber 36 passes through the filter 38 and is purified by removing dust in the air, and then flows into the clean side chamber 35.

  The air flowing into the clean side chamber 35 is guided to the introduction port 46 while being rectified by the rectifying member 47, and is sent to the cylinder head of the engine via the outlet hose 21.

  As described above, according to the air cleaner 30 according to the embodiment of the present invention, the air that has passed through the filter 38 and has flowed into the clean side chamber 35 is easily and smoothly guided to the outlet hose 21 by the rectifying member 47. Therefore, it is possible to improve the suction efficiency, and it is possible to increase the output and improve the fuel consumption.

  In addition, since the rigidity of the connecting pipe 41 can be increased by attaching the rectifying member 47 to the outer wall portion of the connecting pipe 41 of the inlet hose 40, the negative pressure inside the case 31 has increased with the increase in engine output. However, it is possible to prevent the inlet hose connecting pipe 41 from being deformed or vibrated by this negative pressure.

  Furthermore, since the plurality of groove portions 49 are formed by the protrusions 48 protruding from the rectifying member 47, the rectifying action at the air gathering location in the vicinity of the inlet 46 of the outlet hose 21 can be enhanced. The intake efficiency can be further increased, and the output and fuel consumption can be further improved.

  In the above-described embodiment of the present invention, the case where the present invention is applied to a scooter type vehicle is illustrated and described. However, this is not intended to limit the present invention to this case, and the present invention is not limited to other types. This motorcycle can be applied in the same manner as in the above-described embodiment, and the same operational effects can be obtained.

  Moreover, in the above-described embodiment of the present invention, since the preferred embodiment of the present invention is described, there may be various technically preferable limitations, but the technical scope of the present invention is Unless otherwise specifically limited, the present invention is not limited to these embodiments. That is, the above-described components in the embodiment of the present invention can be appropriately replaced with existing components and the like, and various variations including combinations with other existing components are possible. The description of the embodiment of the present invention described above does not limit the contents of the invention described in the claims.

21 Outlet hose 30 Air cleaner 31 Case 34 Partition wall 35 Clean side chamber 36 Dirty side chamber 38 Filter 40 Inlet hose 47 Rectifying member 48 Projection

Claims (3)

A case where the interior is divided into a dirty side chamber and a clean side chamber by a partition wall;
An inlet hose connected to the case and provided in the partition wall so as to communicate with the dirty side chamber after passing through the clean side chamber;
A filter that is provided on the partition wall and purifies air from the dirty side chamber toward the clean side chamber through the inlet hose;
An outlet hose connected to the case and having an inlet opening in the clean side chamber;
A rectifying member provided on the outer wall of the inlet hose in the clean side chamber and extending toward the inlet of the outlet hose so as to follow the flow of air that has passed through the filter and entered the clean side chamber;
An air cleaner characterized by comprising:   The air cleaner according to claim 1, wherein the rectifying member is formed integrally with the inlet hose.   The said baffle member is provided with the some protrusion part extended toward the inlet of the said outlet hose so that the flow of the air which flowed in into the said clean side chamber may be followed. Air cleaner.

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