JP3508867B2 - Running wind introduction device for motorcycles - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling wind introduction device for a motorcycle in which the amount of traveling wind introduced is increased as much as possible to improve output. 2. Description of the Related Art A handle, a front cowl covering the front thereof, a fuel tank located behind the handle, an intake device such as a carburetor disposed below the handle, an intake device and a front cowl. 2. Description of the Related Art A motorcycle provided with a wind guide path communicating with an inlet provided in a vehicle is well known. An example of such a device is shown in Japanese Utility Model Application Laid-Open No.
In Japanese Patent Publication No. 117082, introduction ports are provided on the left and right of the upper end portion of the front cowl, and the introduction port and the carburetor are communicated with each other through a substantially inverted L-shaped air guide passage passing through the upper part of the handle and passing through the fuel tank. Things are shown. In Japanese Utility Model Publication No. Sho 62-36706, an inlet is provided substantially at the center of the front surface of a front cowl, and a hollow extending substantially forward along the center of the vehicle body from a head pipe to support the front cowl. The use of stays for air ducts is shown. [0005] Incidentally, in order to improve the output of this type of traveling wind introduction device, it is desired to increase the traveling wind introduction amount as much as possible. For this purpose, the position of the inlet should be changed
Rather than being provided at the upper end as in No. 82,
It is more advantageous to provide the front cowl approximately at the center of the front end portion as disclosed in Japanese Patent No. 6706. That is, in a front cowl formed of a continuous curved surface so as to produce a rectifying effect, a substantially central portion of the front end is located at a position where the wind pressure is highest. However, in the case of the latter conventional example, since the stay also serves as an air guide path, the stay must be quite thick, and as a result, auxiliary equipment is arranged in the space between the head pipe and the front cowl. If so, the stay makes it extremely difficult to arrange auxiliary equipment. Therefore, it has not been possible to simultaneously adopt the arrangement of accessories in the space between the head pipe and the front cowl and the structure in which the inlet is provided substantially at the center of the front end of the front cowl. Then, this application aims at solving such a problem. In order to solve the above-mentioned problems, a traveling wind introducing device according to the present invention is provided with a head pipe for supporting a front fork at a front end of a main frame, and a head pipe for rotating the front fork. A handle attached to the upper portion thereof, a front end portion located in front of the head pipe in a side view and extending diagonally upward and rearward from the front end portion to cover the handle and the front thereof, and a handlebar located behind the handlebar. A front end of the front cowl in a motorcycle including a fuel tank, an intake device disposed below the fuel tank, an inlet provided in the front cowl at front and rear ends, and a wind guide path communicating with the intake device. the part behind placing the auxiliary machines between the head pipe, wherein the inlet is open to the front end portion substantially center of the front cowl, the air guide path is before
An end is formed integrally with the front cowl , extends in the front-rear direction while bending upward so as to bypass the handle, and a front end of the air guide path extends rearward and upward along the inner surface of the cowl, and It is characterized by being bifurcated in the left-right direction from the inlet and extending rearward. [0010] Since the introduction opening is opened substantially at the center of the front end of the front cowl, the amount of traveling wind introduced increases. Moreover, the front end of the air guide path is formed integrally with the front cowl,
Rutotomoni extending back-and-forth direction while being curved upwardly so as to bypass the handle upper, front portion of the air guide path is bifurcated from the extension beauty and inlet back upwardly along the inner surface of the cowl to the lateral direction Since it extends rearward, it is possible to dispose it avoiding the auxiliary equipment arranged behind the inlet. That is, by extending the front end of the air guide path upward along the inner surface of the front cowl extending obliquely upward and rearward so as to cover the front of the handlebar, the air guide path is arranged vertically using the inner surface of the front cowl. The front cowl can be installed at the front end of the front cowl, which has the highest wind pressure. The space between the air guide port and the head pipe can be efficiently arranged.
Moreover, the wind guideway with such a structure is
It can be easily formed by forming it on the body. An embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 shows an automatic 2 to which the traveling wind introduction device of the embodiment is applied.
2 is a front view of the wheeled vehicle, FIG. 2 is a front view thereof, FIG. 3 is a side sectional view showing a front part of the vehicle body enlarged and partially cut away to show an intake system part, and FIG. FIG. 5 is an enlarged side cross-sectional view of a part of the intake device. Referring to FIG. 1, a front fork 2 supporting a front wheel 1 has a handle 3 attached at an upper end thereof and is connected to a front end of a main frame 5 via a head pipe 4. The main frame 5 extends rearward in a pair to the left and right. A well-known cantilever swing arm 6 is connected to a rear portion of the main frame 5 so as to be vertically swingable. The rear wheel 7 is supported at the rear. A fuel tank 8 is supported on the main frame 5. The fuel tank 8 is locked to the main frame 5 by an engagement portion 9 at the rear end, and the front end is also locked to the main frame 5 by a band (not shown). A fuel cock 10 is provided at the bottom of the fuel tank 8, and a carburetor 1 which is an example of an intake device in the present application.
1 is supplying fuel. The downstream side of the vaporizer 11 is 2
The engine is connected to a cycle V-type two-cylinder engine 12. The vaporizer 11 is entirely surrounded by an intake box 13 described later. Therefore, the whole of the vaporizer 11 including the float chamber 11a (FIG. 5) is uniformly pressurized by the ram pressure by the traveling wind, so that the fuel supply is smoothly performed regardless of the pressure fluctuation due to the change of the traveling state. The intake box 13 communicates with an inlet 17 provided in a front cowl 16 via a suction pipe 14 and a cowl integral duct 15 which constitute a wind guide path of the present invention. The air guide path extends in the front-rear direction while curving upward so as to bypass the handlebar 3 in a side view state as illustrated. In a space forward of the head pipe 4 and behind the inlet 17 surrounded by the front cowl 16, accessories are supported by stays 18 extending forward from the head pipe 4. The accessories in the present embodiment include various instruments 19, a catch tank 20, an exhaust control device (reference numeral 40 in FIG. 4 described later), and the like. The catch tank 20 is a box hose 2
1 communicates with the intake box 13 and communicates with the upper part of the fuel tank 8 via a valve hose 22 and a tank hose 23 via a control valve described later. In the drawing, reference numeral 24 denotes a radiator, 25 denotes an exhaust pipe, 26 denotes a muffler, 27 denotes a stay, 28 denotes a rear cowl, 29 denotes a rear cushion, and 30 denotes a fuel tank support bracket. As is apparent from FIG. 2, the introduction port 17 is opened substantially at the front end of the front cowl 16. 3 and 4, the opening is formed at the front end of the front cowl 16, and
It is also the part where the wind pressure becomes the highest when the traveling wind is received in front. 3 and 4, an instrument support plate 18a on which an instrument 19 is mounted is provided on the stay 18, and a catch tank 20 and a control valve 32 are supported below the stay 18. The catch tank 20 is for collecting and temporarily storing the fuel flowing out of the fuel tank 8, and one end of a box portion hose 21 is connected to an outlet portion 31 provided at an upper portion on the front end side. , Is connected to the control valve 32 at an inlet 20a provided at the rear end. The control valve 32 has an outflow port 33 and an inflow port 34 formed in the vertical direction, and as shown in FIG.
4 is connected to one end of a tank hose 23,
A valve part hose 22 is connected between the third part 3 and the inlet part 20 a of the catch tank 20. The opening and closing control of the control valve 32 is performed by a control device (not shown).
1. Valve hose 22, control valve 32 and tank hose 2
The fuel is added into the fuel tank 8 through the fuel tank 3. Further, it is closed at the time of deceleration due to braking or the like so as to prevent fuel from flowing backward from the fuel tank 8 to the catch tank 20. The suction pipe 14 is a pipe made of metal such as aluminum, penetrates the fuel tank 8 in the vertical direction, and is fixed to the fuel tank 8 by welding or the like. The rear end (lower end) enters the intake box 13 and the front end extends upward to form a ring-shaped joint rubber 35 and a cowl-integrated duct 1.
5 is connected to the rear end. As is apparent from FIG. 4, the air guide path formed by the suction pipe 14 and the cowl integrated duct 15 is bifurcated in the left and right direction at the inlet 17 to separate the auxiliary equipment (19, 20, 32 and 40). It extends rearward in pairs while avoiding. The cowl integrated duct 15 is integrally formed of the same material as a front cowl 16 made of CFRP (carbon fiber reinforced resin), and the front end is attached to the inner surface of the front cowl 16 during molding. 3, the front end is along the inner surface of the front cowl 16. The front cowl 16 is attached to a stay 36 extending from the front end of the main frame 5 on the right and left rear ends by a connecting member 36a such as a bolt.
8 is attached to the end of the main frame 5 by a connecting member 38 (FIG. 3). In FIG. 4, reference numeral 40 denotes a known exhaust control device, which includes a servomotor and the like, and is supported by the stay 18 via a stay 40a. The fuel cock 10
A fuel pipe 41 extending from the carburetor 11 enters the intake box 13 and is divided into two by a three-port joint 42.
Leads to In this figure, the center of the opening / closing lid 43 of the intake box 13 is cut away, and the internal carburetor 11 is shown together with the fuel pipe 41. The opening / closing lid 43 of the intake box 13 extends around the intake box 13. Screwed. As is apparent from FIG.
An opening 44 is formed in the upper surface on the front side of the
4, a rear end opening 45 is inserted. Intake box 1
Inside 3 is a front chamber 47 and a rear chamber 4 by an intermediate filter 46.
It is divided into eight. The clean air flowing from the front chamber 47 through the filter 46 is supplied to the vaporizer 1 housed in the rear chamber 48.
1 and the filter 46 is replaceable by removing the opening / closing lid 43. Next, the operation of this embodiment will be described. Figure 1,
In 3 and 4, first, since the introduction port 17 is opened substantially at the center of the front end of the front cowl 16, the wind pressure of the traveling wind becomes highest, the amount of air introduced into the intake box 13 increases, and the output of the engine 12 increases. Is improved. Further, as is apparent from the side view of FIGS. 1 and 3, the air guide passages (14, 15) extend in the front-rear direction while curving upward so as to bypass the upper side of the handle 3, and The front ends of the roads (14, 15) extend upward along the inner surface of the front cowl 16 extending obliquely upward and rearward so as to cover the front of the handlebars, and form a substantially V-shaped front view in FIG. The inner surface of the inlet 16 is disposed in the up and down direction, and as shown in the plan view of FIG. Can be arranged avoiding the auxiliary equipment (19, 20, 32, and 40) arranged in the area. For this reason, the auxiliary equipment (19, 20, 32, and 40) is provided without increasing the width of the front cowl 16 while efficiently introducing the traveling wind by providing the wind guide port 17 substantially at the front end of the front cowl having the highest wind pressure. Can be efficiently arranged between the wind guide port 17 behind the front end of the front cowl 16 and the head pipe 4. Moreover, the front end of the air guide path 15
By forming the part integrally with the front cowl 16,
Align the front end of the air guide path 15 with the inner surface of the front cowl 1
To be installed in the vertical direction, and from the inlet 17 to the left and right.
The above-mentioned characteristic structure of
The air guide path 15 can be easily formed. The invention of the present application is not limited to the above embodiment but can be variously modified. For example, the intake box 13 of the intake device may be replaced with a known air cleaner, or the carburetor 11 may be replaced with a known air cleaner. A fuel injection device may be provided.
Furthermore, the suction pipe 14 may not penetrate the fuel tank 8 but may penetrate the main frame 5 or pass below it. According to the traveling wind introduction device according to the present invention, since the introduction opening is opened substantially at the center of the front end of the front cowl, the wind pressure of the traveling wind becomes highest, and the amount of air introduced into the intake device is reduced. Increase and the output of the engine improves. [0039] At the same time, along with extending back upward I along the inner surface of the cowl front end portion to extend in the front-rear direction while bypassing the handle upward is curved air guide path upward, bifurcated from the inlet to the horizontal direction And extended it backwards. For this reason, even if auxiliary equipment is arranged behind the introduction port, it can be avoided and passed through. Therefore, despite the adoption of the inlet opening substantially at the center of the front end of the front cowl, accessories can be arranged in the space surrounded by the front cowl behind the inlet. That is, by extending the front end of the air guide path upward along the inner surface of the front cowl extending obliquely upward and rearward so as to cover the front of the handlebar, the air guide path is arranged vertically using the inner surface of the front cowl. As it can be installed, the wind guide port is provided almost at the front end of the front cowl with the highest wind pressure, and while efficiently taking in the traveling wind,
Auxiliary equipment can be efficiently arranged between the air guide port behind the front end of the front cowl and the head pipe without widening the front cowl. Moreover, the front end of the air duct
The wind guideway is formed integrally with the front cowl.
Of the front cowl along the inner surface of the front cowl
After arranging and splitting into two forks from the inlet
The air guideway with the characteristic structure described above,
Can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a motorcycle to which a traveling wind introduction device according to an embodiment is applied. FIG. 2 is a front view thereof. FIG. 3 is a vehicle body showing an intake system portion of the embodiment. FIG. 4 is an enlarged cross-sectional view of an intake system portion of the embodiment. FIG. 5 is an enlarged side cross-section of an intake device portion according to the embodiment. Head pipe, 8: fuel tank, 1
1: vaporizer, 12: engine, 13: intake box, 1
4: suction pipe, 15: cowl integrated duct, 16: front cowl, 18: stay, 19: instrument, 20: catch tank, 21: box hose, 22: valve hose, 2
3: Hose in tank, 32: Control valve

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 39/00 B62J 17/00

Claims (1)

(1) A head pipe for supporting a front fork on a front end of a main frame, a handle mounted on an upper part of the front fork to rotate the front fork, and a front end in a side view. A front cowl which is located forward of the head pipe and extends obliquely upward and rearward from the front end to cover the handle and the front thereof, a fuel tank located behind the handle, and an intake device arranged below the front tank In a motorcycle provided with an air inlet provided at a front cowl at the front and rear ends and an air intake device, auxiliary equipment is provided between the head pipe behind the front end of the front cowl. arrangement, and the inlet is open to the front end portion substantially center of the front cowl, the air guide path is the its front end Furontoka
Ur and formed integrally, extends in the front-rear direction while being curved upwardly so as to bypass the handle upper, said guide
The front end of the airway extends rearward and upward along the inner surface of the cowl,
A traveling wind introduction device for a motorcycle, wherein the traveling wind introduction device is bifurcated in a lateral direction from an introduction port and extends rearward.