JP3552690B2 - Motorcycle air cleaner device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a motorcycle air cleaner device.
[0002]
[Prior art]
Many motorcycles are provided with an air cleaner device near an engine. For example, in the case of an engine having the most general layout in which a plurality of cylinders are arranged in a line in the vehicle width direction, a cleaner box serving as a main body of the air cleaner device is installed behind the cylinder of the engine. The inside of the cleaner box is divided into a dirty side and a clean side with a flat filter therebetween, and an inlet is provided on the dirty side and an outlet is provided on the clean side.
[0003]
The inlet portion is provided at a front upper portion of the cleaner box or the like, and an air duct connected to the inlet portion extends forward and opens at a frontmost portion of a cowling that covers a motorcycle body. The outlet portion is formed in a plurality of tubes extending forward from the cleaner box, and these outlet portions are connected to an intake device (such as a carburetor) of each cylinder.
[0004]
When the motorcycle travels, the traveling wind from the front flows into the dirty side of the cleaner box via the air duct and the inlet, and this air passes through the filter to remove dust and the like, and then flows into the clean side, where the clean air flows. Air is distributed to the engine cylinder from each outlet.
[0005]
[Problems to be solved by the invention]
However, in the case of a motorcycle equipped with an engine having a V-shaped cylinder arrangement when viewed from the side of the vehicle, a plurality of outlets extending from a cleaner box installed at the top of the engine are respectively directed forward and backward toward each cylinder. Since it is necessary to adopt a configuration in which fresh air is introduced from the inlet provided at the front upper portion of the cleaner box as described above, it becomes difficult for fresh air to flow uniformly to each outlet. For this reason, the flow of fresh air to the outlet section leading to a specific cylinder is deteriorated, the combustion state in each cylinder becomes uneven, and the performance of the engine tends to become unstable.
[0006]
In addition, the conventional flat filter cannot provide a large filtration area, so the intake resistance tends to increase, and the clean side volume is limited, so mutual intake interference between outlets is likely to occur. However, an effective air cleaner device cannot be formed.
[0007]
Furthermore, if the inlet is provided in another part of the cleaner box to try to equalize the flow of fresh air to the front and rear outlets, it becomes difficult to pipe the air duct connected to the inlet from the outside, and there is no use inside the cowling. There is a concern that dead space will occur.
[0008]
The motorcycle air cleaner device according to the present invention has been made in order to solve the above-described problem, and can adjust the amount of air flowing through a filter without generating dead space in a cowling. A main object of the present invention is to provide a motorcycle air cleaner device that can smoothly equalize the air flow.
[0009]
Another object of the present invention is to provide an air cleaner device for a motorcycle capable of stabilizing engine performance by uniformly flowing fresh air flowing from an inlet portion of a cleaner box to each outlet portion. is there.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, the air cleaner device for a motorcycle according to the present invention includes a cleaner box disposed above an engine having a cylinder arrangement of a V-type two-cylinder as viewed from the side of the vehicle of the motorcycle. A filter is arranged inside, one side of the filter is a dirty side, the other side is a clean side, an inlet portion is provided on the dirty side, and an outlet portion is provided on the clean side, while the motorcycle cowling is directed forward. An air intake device is provided, which is provided with an open air intake, and an air cleaner device through which air flowing from the air intake passes through an air duct and flows into the dirty side as fresh air during traveling. Motorcycle placed between cylinders placed in In the air cleaner unit, said cleaner box, a side view of the vehicle of the motorcycle, the front side of the clean side of the lower surface of the front side recess gouge upwardly of the fuel tank installed on top of the first half of the body frame The cowling for housing the body frame inside is made narrower than the width of a pair of handlebars, and the air intake is provided at the front of the body frame. The head duct is disposed adjacent to a headlamp arranged on the vehicle front side with respect to the head pipe provided in the portion, and the air duct is provided within the width of the cowling , between both sides of the head pipe and between the inside of each of the pair of handlebars. connected to the inlet portion having a lateral hole through which fresh air is passed through, distribution within the cleaner box Filtered and is positioned substantially directly above the crankshaft of the V-type engine is, the filter is formed into a cylindrical shape to be fitted into the fitting frame so as to surround the fresh air from the inlet, the inner peripheral side dirty side, The outer peripheral side is a clean side, and the outlet part is provided separately before and after the filter so as to sandwich the filter, the outlet part before and after the filter is connected to the intake device of each cylinder, between the air intake and the filter. A valve device is provided, and an air cleaner device is provided that adjusts a passage area by operating the valve device to adjust an amount of air flowing through the filter.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a motorcycle air cleaner device according to the present invention will be described with reference to the accompanying drawings.
[0013]
FIG. 1 is a left side view showing an example of a motorcycle to which the air cleaner device according to the present invention can be applied, and FIG. 2 is a plan view of the motorcycle. FIG. 3 is an enlarged left side view of the vicinity of the frontal part of the motorcycle.
[0014]
The motorcycle 1 is of a road sports type in which the front of the vehicle is covered with a streamlined cowling 2, and an engine 4 is suspended on the front half of a body frame 3. The engine 4 is a two-cylinder engine in which two cylinders 5F and 5R are arranged in a V-shape as viewed from the side as shown in FIG.
[0015]
A front pipe 3a (see FIG. 3) provided on the front head of the body frame 3 is provided with a front fork 7 for supporting a front wheel 6 and a handlebar 8 and a brake device 9 and the like so as to be rotatable left and right. A swing arm 13 supporting a rear wheel 12 is rotatably supported up and down on a pivot shaft 11 erected in the vehicle width direction at the center lower portion of the body frame 3. 4 is transmitted through the chain 14.
[0016]
Further, a fuel tank 15 is installed in the upper part of the first half of the body frame 3, and subsequently, a seat 16 and a pillion seat 17 are provided. Reference numeral 18 denotes an exhaust muffler. Further, the cowling 2 is provided with a transparent window screen 20, a headlamp 21 and the like, and air intakes 22, 22 opening toward the front of the cowling 2 are provided on the left and right sides of the headlamp 21, as shown in FIG. Are provided adjacent to each other.
[0017]
The air cleaner device 24 according to the present invention is provided above the engine 4. The air cleaner device 24 mainly includes a cleaner box 25 made of hard synthetic resin and installed above the engine 4. As shown in FIG. 3, a concave portion 15 a which is recessed upward is formed on the lower surface of the fuel tank 15, and the cleaner box 25 is housed in the concave portion 15 a.
[0018]
FIG. 4 is a longitudinal sectional view of the air cleaner device 24. The cleaner box 25 has, for example, a structure that can be divided vertically with a dividing line C as a boundary, and a cap 26 is detachably provided on an upper surface 25 a of the cleaner box 25.
[0019]
The bottom surface 25b of the cleaner box 25 is formed with a ventilation tube 27 extending vertically so as to penetrate a substantially central portion thereof, and a fitting frame portion is provided on the upper surface side of the bottom surface 25b so as to surround the ventilation tube 27. A cylindrical filter 29 is fitted to the outer periphery of the fitting frame 28 from above. That is, the cylindrical filter 29 is provided to stand upright on the bottom surface 25 b of the cleaner box 25. As shown in FIG. 5, the filter 29 is located almost directly above the crankshaft 31 of the engine 4.
[0020]
The upper part of the filter 29 is pressed from above by the cap 26, whereby the filter 29 is fixed in the cleaner box 25. If the cap 26 is removed, the filter 29 can be taken out of the cleaner box 25, and the filter 29 can be replaced or washed. Note that seal members 32 and 33 are interposed between the upper and lower surfaces of the filter 29, the bottom surface 25b of the cleaner box 25, and the cap 26.
[0021]
The inner peripheral side of the filter 29 is a dirty side A and the outer peripheral side is a clean side B. An inlet 35 is provided on the dirty side A side, and outlets 36F and 36R are provided on the clean side B side.
[0022]
According to the air cleaner device 24 of the motorcycle 1, the fresh air flowing from the inlet portion 35 flows uniformly through the entire peripheral surface of the filter 29 formed in a cylindrical shape, so that the filtration area of the filter 29 is large. And the intake resistance is greatly reduced. Further, since the space around the filter 29 formed in a cylindrical shape is entirely on the clean side, the volume of the clean side is increased, and intake interference is prevented.
[0023]
In addition, the inlet portion 35 is located between the cylinders 5F and 5R of the engine 4 arranged in a V-shape when viewed from the side of the motorcycle, and the end portions of the left and right air ducts 41L and 42R are curved inward and the body frame is bent. 3 is connected to the inlet through the pipe members 3b to 3e, so that the flow of fresh air to the outlets 36F and 36R is equalized without generating useless dead space in the cowling 2. Can be.
[0024]
The inlet portion 35 is formed into a bottomed cylindrical shape using the same hard synthetic resin as the cleaner box 25, and is directed downward from the portion where the filter 29 is installed on the bottom surface 25 b of the cleaner box 25, that is, from the portion of the ventilation tube 27. It is attached in an extended form. Connection holes 37, 37 (see FIG. 3) are formed on the lower left and right side surfaces of the inlet portion 35.
[0025]
The inlet portion 35 is located between the front and rear cylinders 5F and 5R of the engine 4 because the filter 29 is located right above the crankshaft 31 of the engine 4. A valve device 38 that is operated by the intake negative pressure of the engine 4 or the like is provided inside the inlet 35 so that the passage area of the ventilation tube 27 is always adjusted to an optimum size by the valve device 38. Has become.
[0026]
On the other hand, two outlets 36F and 36R are provided in front of and behind the filter 29 with the filter 29 interposed therebetween. These two outlets 36F, 36R are formed in a short cylindrical shape using a material such as rubber which is softer than the cleaner box 25, and are circular holes 39, 39 formed in the bottom surface 25b of the cleaner box 25. Are fitted airtightly.
[0027]
The front and rear outlet portions 36F and 36R are connected to intake devices 41F and 41R of the front and rear cylinders 5F and 5R of the engine 4, respectively, as shown in FIG. Here, a fuel injection type throttle body is used as the intake devices 41F and 41R, but an intake device such as a carburetor may be used.
[0028]
According to the configuration of the air cleaner device 24 of the motorcycle 1, fresh air that has passed through the filter 29 from the inlet portion 35 and flowed to the clean side B is distributed to the outlet portions 36F and 36R that are distributed back and forth across the filter 29. Since the air flows evenly, fresh air is supplied to the cylinders 5F and 5R in front and behind the engine 4 in a well-balanced manner, and the combustion state of each of the cylinders 5F and 5R is made uniform and the engine performance is stabilized.
[0029]
In addition, since the filter 29 is located between the outlets 36F and 36R, the intake negative pressure at one outlet 36F or 36R hardly affects the intake pressure at the other outlet 36R or 36F. In this respect, the occurrence of intake interference can be effectively and effectively prevented.
[0030]
By the way, tubular air ducts 42L, 42R are connected to a pair of left and right air intakes 22, 22 provided in the streamlined cowling 2 covering the front body of the motorcycle 1 as described above. I have. The air ducts 42L, 42R extend rearward through the inside of the cowling 2, and the ends of the air ducts 42L, 42R are curved inward, respectively, and are connected to the left and right connection holes 37, 37 of the inlet 35. I have.
[0031]
As shown in FIG. 3, the front half of the body frame 3 is configured by combining a plurality of pipe members 3b to 3e, and the end of each of the air ducts 42L and 42R extends between the pipe members 3b to 3e. Then, it is connected to the connection holes 37 of the inlet part 35. The chamber 43 provided near the front end of each of the air ducts 42L and 42R is for collecting and removing moisture and the like contained in the air passing through the air ducts 42L and 42R.
[0032]
The air cleaner device 24 is configured as described above. When the motorcycle 1 travels, traveling wind from the front flows into the inlet section 35 of the cleaner box 25 through the left and right air ducts 42L and 42R as indicated by arrows in FIG. The traveling wind first enters the dirty side A as fresh air, and then enters the clean side B after passing through the filter 29 to remove dust and the like. Then, clean air is distributed to the cylinders 5F, 5R of the engine 4 from the front and rear outlets 36F, 36R.
[0033]
According to the air cleaner device 24 configured as described above, fresh air flowing from the inlet portion 35 flows through the entire peripheral surface of the filter 29 formed in a cylindrical shape and flows uniformly. Therefore, the intake resistance can be greatly reduced. Further, since the entire space around the filter 29 formed in a cylindrical shape can be used as the clean side B, the volume of the clean side B can be increased to effectively prevent the intake interference.
[0034]
Moreover, the inlet portion 35 is located between the cylinders 5F and 5R of the engine 4 arranged in a V-shape when viewed from the side of the vehicle, and the end portions of the left and right air ducts 42L and 42R curve inward to form the body frame 3. Is connected to the connection holes 37, 37 of the inlet section 35 through the space between the pipe members 3b to 3e, so that fresh air to each of the outlet sections 36F, 36R is generated without generating useless dead space in the cowling 2. Flow can be equalized.
[0035]
In addition, fresh air that has passed through the filter 29 from the inlet portion 35 and has flowed to the clean side B uniformly flows to the outlet portions 36F and 36R that are provided in front and rear across the filter 29. Fresh air is supplied to 5F and 5R in a well-balanced manner, and the combustion state of both cylinders 5F and 5R is made uniform. Therefore, the performance of the engine 4 can be stabilized.
[0036]
In addition, since the filter 29 is located between the two outlets 36F and 36R, the intake negative pressure at one outlet 36F or 36R is less likely to affect the intake pressure at the other outlet. The occurrence of intake interference can be prevented.
[0037]
【The invention's effect】
As described above, in the motorcycle air cleaner device according to the present invention, the amount of air flowing through the filter can be adjusted without generating useless dead space in the cowling, and the flow of fresh air to each outlet portion is reduced. It is possible to smooth and equalize, stabilize the combustion state in each cylinder, stabilize engine performance, and improve reliability.
[0038]
Further, the air cleaner device for a motorcycle according to the present invention allows an air duct to pass through a width of a cowling narrower than a width of a handlebar, and supplies fresh air to cylinders before and after the engine in a well-balanced manner through this air duct. It is possible to stabilize engine performance by making the combustion state of the cylinder uniform, and to provide a highly reliable air cleaner device.
[Brief description of the drawings]
FIG. 1 is a left side view showing an example of a motorcycle to which an air cleaner device according to the present invention can be applied.
FIG. 2 is a plan view of the motorcycle.
FIG. 3 is an enlarged left side view of the vicinity of the frontal part of the motorcycle.
FIG. 4 is a longitudinal sectional view of the air cleaner device.
FIG. 5 is a longitudinal sectional view of an air cleaner device, an engine, and a cowling showing one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Cowling 3 Body frame 3b-3e Pipe member 4 which constitutes body frame 4 Engine 5F, 5R Cylinder 22, 22 Air intake 24 Air cleaner device 25 Cleaner box 25b Cleaner box bottom surface 29 Filter 35 Inlet portions 36F, 36R Outlet part 41 Intake device 42L, 42R Air duct A Dirty side B Clean side

Claims (1)

A cleaner box is arranged above an engine having a cylinder arrangement of V type two cylinders in a motorcycle side view, a filter is arranged in this cleaner box, one side of the filter is a dirty side, the other side is a clean side, The inlet is provided on the dirty side and the outlet is provided on the clean side, respectively, while the cowling of the motorcycle is provided with an air intake opening forward, and when traveling, traveling wind passes through the air duct from the air intake. An air cleaner device for a motorcycle provided with an air cleaner device that flows into the dirty side as fresh air, and an intake device following the air cleaner device is disposed between cylinders arranged in the V-shape.
The front side of the clean side is deeper than the rear side of the cleaner box in a concave portion obtained by making the lower surface of the front side of the fuel tank installed on the upper part of the front half portion of the motorcycle frame upward when the motorcycle is viewed from the side of the motorcycle. in matches, plan view of the vehicle of the motorcycle, wherein with the body frame narrower than the width the width of a pair of handlebars of the cowling collapsed inside, head provided with the air intake to the forehead of the body frame The air duct is disposed adjacent to a headlamp arranged on the vehicle front side of the pipe, and the air duct is passed between the inside of the pair of handlebars and both sides of the head pipe within the width of the cowling. Connected to the inlet having left and right holes through ,
A filter arranged in the cleaner box is located almost directly above the crankshaft of the V-type engine, and the filter is formed in a tubular shape that fits into a fitting frame surrounding fresh air from the inlet , The inner peripheral side is a dirty side, the outer peripheral side is a clean side, and the outlet part is provided separately before and after the filter so as to sandwich the filter, and the outlet part before and after the filter is connected to the intake device of each cylinder,
A valve device is disposed between the air intake and the filter, and an air cleaner device is provided that adjusts a passage area by operating the valve device to adjust an amount of air flowing through the filter. Motorcycle air cleaner device.

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