JP2005069201A - Exhaust control device of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance assemblability of an exhaust valve by solving a problem of insufficient operability of assembling of the exhaust valve, and to stop a valve element at an initialize position when loosing an operation wire by solving such a problem that at a state of loosing the operation wire, a rotation angle of the valve element is stopped with an optional angle. <P>SOLUTION: In this motorcycle 10, an engine 211 is installed to a vehicle body frame 110, an exhaust pipe 39 is connected to the engine 211, and the exhaust valve 12 for controlling a flow rate of an exhaust gas is provided to the exhaust pipe 39. In the motorcycle 10, the exhaust valve 12 comprises: a valve 61 for changing the flow rate of the exhaust gas of the exhaust pipe 39; a valve rod 62 for mounting the valve 61; a pulley 63 for rotating the valve rod 62; a stopper piece 64 formed separately from the pulley 63 and mounted to the valve rod 62; and a stopper receiver 65 which regulates an opening/closing angle of the valve 61 by abutting the stopper 64 thereto. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an exhaust control device for a motorcycle capable of controlling the flow rate of exhaust gas.

2. Description of the Related Art As an exhaust control device for a motorcycle, an exhaust control device for a motorcycle that is provided with a valve in an exhaust passage of an engine exhaust system and controls the flow rate of exhaust gas flowing through the exhaust passage with this valve is put into practical use.
In a practical motorcycle exhaust control device, it is practically sufficient to provide a valve in an exhaust pipe as an exhaust passage and open and close the valve.

As such an exhaust control device for a motorcycle, a device in which a pulley is attached to a valve stem of a valve and the pulley is operated by a cable is known (for example, see Patent Document 1).
Japanese Patent Publication No. 6-76780

FIG. 19 is a reproduction of FIG. 6 of Patent Document 1. However, the reference sign is the same as that of Patent Document 1.
The exhaust control device for a motorcycle disclosed in Patent Document 1 includes a valve body 22b rotatably attached to a casing 22a, rods 40 and 41 attached to the valve body 22b, a wire drum 42 attached to the rod 41, and the wire. The switching valve 22 is constituted by a nut 43 that fixes the drum 42 to the rod 41, and the wires 23 and 23 are wound around the wire drum 43 of the switching valve 22 (hereinafter referred to as "exhaust valve") to provide a valve body. 22b is driven.

However, in the exhaust control device for a motorcycle disclosed in Patent Document 1, when the wire drum 42 (hereinafter referred to as “pulley”) is attached to the rod 41 and the nut 43 is screwed into the rod 41, the rod 41 and the valve body 22b rotate. Therefore, it is necessary to fix the rod 41 or the valve body 22, and improvement in workability of assembly is desired.
In addition, the exhaust control device for a motorcycle disclosed in Patent Document 1 has a problem that the rotation angle of the valve body 22b stops at an arbitrary angle when the wires 23 and 23 (hereinafter referred to as “operation wires”) are loosened. . In general, it is often preferable to regulate the initialization position of the valve body 22b.

  An object of the present invention is to provide an exhaust control device for a motorcycle that can improve the assembly of the exhaust valve. Further, the present invention solves the point that the rotation angle of the valve body stops at an arbitrary angle when the operation wire is loosened, and the exhaust of the motorcycle that can stop the valve body at the initializing position when the operation wire is loosened. It is an object to provide a control device.

  According to the first aspect of the present invention, there is provided a motorcycle including an engine mounted on a body frame, an exhaust pipe connected to the engine, and an exhaust valve for controlling a flow rate of exhaust gas provided in the exhaust pipe. In the exhaust valve, the valve for changing the flow rate of the exhaust gas in the exhaust pipe, the valve rod for mounting the valve, the pulley for rotating the valve rod, and the pulley are formed separately from the valve rod. A stopper piece to be attached and a stopper receiver for restricting the opening / closing angle of the valve by applying the stopper piece are provided.

If the shape of exhaust valve components such as pulleys can be simplified, it is preferable to improve the productivity of exhaust valve components.
Therefore, a valve that changes the flow rate of exhaust gas is attached to the exhaust pipe, a valve stem is attached to this valve, a pulley is attached to this valve stem, and a stopper piece formed separately from this pulley is attached to the valve stem. A stopper receiver for hitting the stopper piece was provided.
That is, by forming a stopper piece separately from the pulley and providing a stopper receiver to which the stopper piece is applied, exhaust valve components such as a pulley can be made simple. As a result, the productivity of exhaust valve components can be improved.

According to a second aspect of the present invention, there is provided a first locking portion for locking the stopper piece when the valve is opened and a second locking portion for locking the stopper piece when the valve is closed. Is provided.
By providing the stopper receiver with a first locking portion for locking the stopper piece when the valve is opened and a second locking portion for locking the stopper piece when the valve is closed, the valve opening direction And the valve position can be regulated in the valve closing direction. As a result, the first locking part or the second system support part can also be used as a stopper when attaching the pulley to the valve, and the assembly of the exhaust valve can be improved.

The invention according to claim 3 is characterized in that a torsion spring for biasing in the valve opening direction is interposed between the pulley and the stopper receiver.
An initialization position of the exhaust valve can be set in the valve opening direction by interposing a torsion spring that biases in the valve opening direction between the pulley and the stopper receiver. As a result, the reliability of the exhaust valve can be improved.

  In the invention according to claim 1, the exhaust valve has a valve for changing the flow rate of the exhaust gas in the exhaust pipe, a valve rod for mounting the valve, a pulley for rotating the valve rod, and the pulley separately. Since it has a stopper piece that is formed and attached to the valve stem and a stopper receiver that regulates the opening and closing angle of the valve by applying this stopper piece, exhaust valve components such as pulleys can be made simple . As a result, there is an advantage that productivity of exhaust valve components can be improved.

  In the invention according to claim 2, the first stopper for locking the stopper piece when the valve is opened and the second locking portion for locking the stopper piece when the valve is closed are provided on the stopper receiver. Therefore, the valve position can be regulated in the valve opening direction and the valve closing direction. As a result, the first locking part or the second system support part can be used as a stopper when the pulley is attached to the valve, and there is an advantage that the assembly of the exhaust valve can be improved.

  In the invention according to claim 3, since the torsion spring that biases the valve in the valve opening direction is interposed between the pulley and the stopper receiver, the initialization position of the exhaust valve can be set in the valve opening direction. As a result, there is an advantage that the reliability of the exhaust valve can be improved.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a left external view of a motorcycle equipped with an exhaust control device according to the present invention. The motorcycle 10 is a scooter type vehicle having a low floor type floor 25.
A body cover 20 that covers the entire body frame of the motorcycle 10 includes a front cowl 21 that covers a front portion of the body frame and an upper portion of the front wheel, which will be described later, an upper cover 22 that covers an upper opening of the front cowl 21, and a rear portion of the front cowl 21. An inner cover 23 that covers the vehicle body, a center cover 24 that extends rearward from the rear end of the inner cover 23 to cover the longitudinal center of the vehicle body frame, and a low-floor type floor that extends outward from the lower edge of the center cover 24 and rests on the driver's feet. 25, a floor skirt 26 extending downward from the outer edge of the low floor type floor 25, rear side covers 27, 27 extending rearward from the center cover 24 and covering the rear side portion of the vehicle body frame (the rear 27 is not shown), The rear side covers 27, 27 extend rearward from the rear ends of the rear side covers 27, and the rear cover 28 covers the rear portion of the vehicle body frame. The rear side covers 27, 27 and the rear cover 28 constitute a seat cowl 29.

The front cowl 21 includes a transparent wind screen 95 at the top. The inner cover 23 includes a leg shield 91 that covers the front part of the driver's legs.
The motorcycle 10 further includes a handle 203 at the front of the vehicle body and a seat 208 and a step holder 300 at the rear of the vehicle body.

  The handle 203 has a similar shape of a so-called chopper type handle in which the grips 203a and 203a are relatively high and pulled backward. The handle 203 was covered with the handle cover 101. The handle cover 101 includes a lower handle cover 102 that covers the left and right lower portions of the handle 203 and an upper handle cover 103 that covers the upper portion of the handle 203.

  The seat 208 is a double seat composed of a seat front portion 208a where a driver sits and a seat rear portion 208b where a passenger sits. The step holder 300 is disposed adjacent to the rear portion of the center cover 24, and is provided with a pillion step (passenger step) 310 on which a rider puts his / her foot so as to be stored and exposed.

In the figure, 261 is a headlamp, 262 is a blinker, 263 and 263 are mirrors, 264 is a front fender, 265 is a seat lock lock, 266 is a rear spoiler, 267 is a tail lamp, 268 is a rear fender, 269 is a sub stand, and 320 is a main stand The stand, 330 is an oil supply lid, and 360 is an inspection side lid.
Reference numerals 271 and 272 denote master cylinders, which generate braking hydraulic pressure by operating the brake levers 273 and 274.

FIG. 2 is a right external view of a motorcycle equipped with an exhaust control device according to the present invention, and shows that a meter panel 92 is provided above the front cowl 21 and behind the wind screen 95. As is clear from the above description, the wind screen 95, the leg shield 91, and the meter panel 92 can be provided at the front of the vehicle body.
Furthermore, this figure shows that the step holder 300 including the pillion step 310 is also arranged on the right side of the motorcycle 10. Reference numeral 34 denotes a muffler (exhaust silencer).

  FIG. 3 is a side sectional view of a motorcycle equipped with an exhaust control device according to the present invention. The motorcycle 10 includes a body frame 110, a front fork 201 attached to the head pipe 111 of the body frame 110 so as to be able to swing left and right, a front wheel 202 attached to the front fork 201, the handle 203 connected to the front fork 201, The engine 211 attached to the rear part of the body frame 110, the power transmission mechanism 212 that can swing up and down around the crankshaft of the engine 211, the rear wheel 205 attached to the rear part of the power transmission mechanism 212, and the power transmission to the body frame 110 The rear cushion unit 206 with the rear end of the mechanism 212 suspended, a storage box 207 attached to the rear upper part of the vehicle body frame 110, and the seat 208 disposed on the storage box 207 and attached to be openable and closable. This is a scooter type vehicle.

The front fork 201 is a gate-type fork arranged below the head pipe 111. The upper portion of the front fork 201 and the head pipe 111 are covered with the front cowl 21.
The engine 211 is a water-cooled two-cylinder engine in which the two left and right cylinder heads 215 are slightly inclined toward the front upper direction and are arranged substantially horizontally. The power transmission mechanism 212 is a belt converter continuously variable transmission with a centrifugal clutch configured to transmit the power of the engine 211 to the rear wheel 205.

The storage box 207 is a box elongated in the front-rear direction of the vehicle body so that two helmets Hf and Hr can be stored in the front and rear, and the upper box 207b superimposed on the rear upper part of the lower box 207a and the lower box 207a. It consists of.
In the figure, 93 is a front lower cover, 94 is an under cover, 191 is an air cleaner, 221 is a radiator, 230 is a fuel tank, 234 is a fuel filler port, 282 is a connecting tube, 283 is an air chamber, 284 is a throttle valve, and 285 is an inlet pipe. (Inlet pipe) 286 is a battery.

  FIG. 4 is a perspective view of a body frame of a motorcycle equipped with an exhaust control device according to the present invention. The body frame 110 includes a front frame 112 connected to the head pipe 111 and left and right sides extending rearward from the rear portion of the front frame 112. A pair of seat rails (rear frames) 115 and 115 is a double cradle type integrated frame joined by welding. The head pipe 111 includes a cowl stay bracket 111a.

  The front frame 112 hangs a pair of left and right upper frames 113, 113 rearward and downward from the head pipe 111, and a pair of left and right down tubes 114, 114 downward from the head pipe 111 below the pair of upper frames 113, 113. The lower ends of the pair of down tubes 114 and 114 are extended rearward to be coupled to the lower ends of the pair of upper frames 113 and 113, and further extended rearward and upward. Since the front frame 112 has such a configuration, it is possible to provide a space portion Sp1 that is surrounded by the pair of upper frames 113 and 113 and the pair of down tubes 114 and 114 and has a substantially triangular shape in side view.

  Between the front end of the left rear frame 115 and the front end of the right rear frame 115, a front-view type first cross member 121 is spanned, and the lower end of the left upper frame 113 and the lower end of the right upper frame 113 are The second cross member 122 is spanned between the two, and the engine first bracket 123 is coupled to the center position of the second cross member 122 in the vehicle width direction.

  A third cross member 124 is bridged between the rear end portion of the horizontal portion of the left down tube 114 and the rear end portion of the horizontal portion of the right down tube 114, and the vehicle width center position of the third cross member 124 is determined. In addition, the second bracket for engine 125 is coupled, and the left and right third engine brackets 126, 126 are coupled to the rear ends of the left and right down tubes 114, 114, respectively.

  The pair of left and right rear frames 115 and 115 is a member having a vertically long cross-sectional shape in which one end is coupled to the middle of the pair of left and right upper frames 113 and 113 and the other end extends rearward. Here, the “longitudinal cross-sectional shape” means a cross-sectional shape having a vertical dimension larger than the horizontal dimension. Specifically, the rear frames 115 and 115 are formed of square pipes having a vertically long rectangular cross section.

  In the figure, 131a is a U-shaped stay, 131b is a seat hinge support portion, 131c is an extension member, 141 is a floor support stay, 143 is an underframe, 144 headed pins, 142 is a stay, 143a and 143a are left and right side members. 143b is a central cross member, 143c is a rear cross member, 145 to 147 are brackets, 148 is a hook, 151 is a front cross member, 152 and 153 are reinforcing members, 226 is an engine ignition coil, and 227 is a bolt.

  FIG. 5 is a left side view of an engine, a power transmission mechanism, and a seat of a motorcycle equipped with an exhaust control device according to the present invention. The engine 211 is located behind the front frame 112 and below the pair of rear frames 115 and 115. The power transmission mechanism 212 is disposed, and the engine 211 is attached in the vicinity of the connection portion between the front frame 112 and the left and right rear frames 115, 115 (only shown on the left in the figure, the same applies hereinafter).

  Specifically, a space portion Sp2 having a substantially triangular shape in side view is provided at the rear portion of the front frame 112 and surrounded by the pair of upper frames 113 and 113, the pair of down tubes 114 and 114, and the pair of rear frames 115 and 115. The cylinder head 215 and the head cover 216 of the engine 211 are disposed in the space Sp2, the front lower portion of the engine 211 is attached to the first bracket 123 for the engine, and the rear lower portion of the engine 211 is attached to the second bracket 125 for the engine. The rear upper part of the engine 211 is attached to the third brackets 126, 126 for the engine. The front and middle rear cross members 131 and 132 are arranged above the engine 211.

  Further, this figure shows that the rear end portion of the power transmission mechanism 212 is suspended from the left and right cushion brackets 134, 134 via the left and right rear cushion units 206, 206, and that the front rear cross member 131 is an openable seat. It shows that it also served as the member which supports 208 seat hinge 208c.

  That is, the body frame 110 extends a pair of left and right rear frames 115 and 115 (one 115 not shown) from the rear portion of the front frame 112 connected to the head pipe 111 to the rear, and the rear frame 115 and the seat 208 and the rear cushion are extended. In a vehicle body frame of a scooter type vehicle that supports units 206 and 206 (one 206 not shown) and has an engine 211 disposed behind the front frame 112 and below the pair of rear frames 115 and 115, above the engine 211. It can be said that cross members 131 to 133 (see FIG. 4 for reference numeral 133) are detachably spanned between the pair of left and right rear frames 115, 115.

The motorcycle exhaust control device 11 (hereinafter abbreviated as “exhaust control device 11”) will be described in detail below.
FIG. 6 is a side view of the exhaust control device for a motorcycle according to the present invention.
An exhaust control device 11 (hereinafter abbreviated as “exhaust control device 11”) for a motorcycle is attached to an exhaust pipe 39 to change an exhaust gas flow rate, and an operation wire 13 for operating the exhaust valve 12. , 14, a servo motor 15 that drives these operating wires 13, 14, and a control unit (ECU) 16 that controls the flow rate of exhaust gas by controlling the servo motor 15.
In general, an ECU (electronic control unit) refers to an electronic control device that controls an engine, an AT (automatic transmission), an ABS (antilock brake system), and the like by a computer.

  The rear cushion arm 17 located in the vicinity of the exhaust valve 12 is a member that supports the right rear cushion unit 206 and supports the rear wheel 205 in a rotatable manner by being integrally attached to the power transmission mechanism 212 described above. A member including a cushion support portion 213 that supports the rear cushion unit 206, a rear wheel support portion 214 that supports the rear wheel 205, and a recess portion 18 that is recessed toward the center of the vehicle body. This is a member constituting a swing arm (rear hawk) 19 that rotatably supports the rear wheel 205 by the mechanism 212 and the rear cushion arm 17.

  FIG. 7 is an exploded perspective view of an exhaust system device equipped with an exhaust control device according to the present invention. The exhaust system device 30 includes first and second pipes 31 and 32 extending from the engine 211 (see FIG. 6), an exhaust collecting pipe 33 that bundles the first and second pipes 31 and 32, and the exhaust collecting unit. A muffler 34 connected to the pipe 33, a muffler protector 35 that covers the muffler 34, a muffler guard 36 that protects the muffler 34, and a band 38 that fixes the muffler 34 to the exhaust collecting pipe 33 via a gasket 37.

In general, the exhaust pipe refers to an exhaust pipe (exhaust pipe) connected to each cylinder of the engine. In this specification, the exhaust pipe 39 includes first and second pipes 31 and 32 and an exhaust collecting pipe 33. Say what you want.
The exhaust collecting pipe 33 connects the first connecting portion 41 for connecting the first pipe 31, the second connecting portion 42 for connecting the second pipe 32, the valve mounting portion 43 for mounting the exhaust valve 12, and the muffler 34. Connecting portion 44 to be connected.

The muffler 34 includes a muffler main body 45, a tail pipe assembly 46 attached to the muffler main body 45, and a tail cover 47 that covers the tail pipe assembly 46.
The muffler protector 35 includes a protector main body 48 that covers the side surface of the muffler main body 45, and a cover 49 that covers the exhaust valve 12 by extending integrally from the protector main body 48 to the front of the vehicle body.

  In the figure, 51 is a bolt for fixing the protector main body 48 to the muffler main body 45 via the elastic bush 56, 52 is a bolt for fixing the cover 49 to the mounting portion 58 of the exhaust valve 12 via the elastic bush 57, 53 is Bolts for fixing the muffler guard 36 to the muffler main body 45, 54 for fixing the tail pipe assembly 46 to the muffler main body 45, and 55 for fixing the tail cover 47 to the muffler main body 45 via the tail pipe assembly 46. is there.

  The exhaust control device 11 includes an engine 211 (see FIG. 6) mounted on a vehicle body frame 110 (see FIG. 4), an exhaust pipe 39 connected to the engine 211, a muffler 34 attached to the exhaust pipe 39, and an exhaust pipe 39. In the motorcycle 10 (see FIG. 2) provided with an exhaust valve 12 for controlling the flow rate of exhaust gas, a muffler protector 35 is provided on the muffler 34, and a cover 49 is integrally extended from the muffler protector 35. The portion 49 covers the exhaust valve 12.

  For example, when the exhaust valve is covered with a cover or the like, if it is possible to cover existing parts without diverting the number of parts by diverting existing parts, the cost of the motorcycle can be reduced, which is preferable.

  Therefore, by extending the cover portion 49 integrally from the muffler protector 35 and covering the exhaust valve 12 with the cover portion 49, the number of components can be reduced as compared with the case where the exhaust valve is covered with another component. it can. As a result, the cost of the motorcycle 10 (see FIG. 6) can be reduced. Further, by extending the cover portion 49 integrally from the muffler protector 35 and covering the exhaust valve 12 with the cover portion 49, the design and merchantability of the motorcycle 10 can be improved.

  Furthermore, by providing the exhaust valve 12 with the attachment portion 58 for attaching the cover portion 49, both vibration of the cover portion 49 and vibration of the exhaust valve 12 can be stopped. Note that attaching the muffler protector 35 to the muffler 34 and the exhaust valve 12 via an elastic member such as the elastic bushes 56 and 57 is also effective against noise, vibration, or heat insulation.

8 is a cross-sectional view taken along the line 8-8 in FIG. 7, and shows a vertical cross section of the exhaust valve 12 and the exhaust pipe 39 (exhaust collecting pipe 33).
The exhaust valve 12 includes a valve 61 that changes the flow rate of the exhaust gas in the exhaust pipe 39 (exhaust collecting pipe 33), a valve rod 62 as an exhaust valve shaft to which the valve 61 is attached, and a pulley that rotates the valve rod 62. 63, an L-shaped stopper piece 64 that is formed separately from the pulley 63 and is attached to the valve stem 62, a stopper receiver 65 that restricts the opening / closing angle of the valve 61 by applying the stopper piece 64, and these A case 66 for housing the pulley 63, the stopper piece 64 and the stopper receiver 65, a lid 67 having the mounting portion 58 described above for covering the case 66, and a valve 61 between the case 66 and the pulley 63. The torsion spring 68 biased in the opening direction, the stopper piece 64, and the pulley 63 are fitted into a two-sided width portion 68a having an oval cross-sectional shape at one end 62a of the valve rod 62. , A nut 69 for fixing screwing the male screw portion 59 formed at one end of the valve rod 62, made of.

  The initialization position of the exhaust valve 12 can be set in the valve opening direction by interposing a torsion spring 68 that biases in the valve opening direction between the pulley 63 and the stopper receiver 65. As a result, as will be described later, the reliability of the exhaust valve 12 can be improved.

  The valve mounting portion 43 of the exhaust collecting pipe 33 includes through holes 71 and 72 that allow the other end 62 b of the valve rod 62 to pass through, and a bearing portion 73 that is provided on the through hole 72 side to support the other end 62 b of the valve rod 62. And a stay 74 to which the case 66 is attached.

  In the figure, 75 is a bolt for fixing the valve 61 to the valve stem 62 via the seat plate 75a, 76 is a bolt for fixing the case 66 to the stay 74 via the stopper receiver 65, and 77 is a case 66 via the stopper receiver 65. The bolts 78 are fixed to the stay 74 and lock one end of the torsion spring 68, and 78 is a stepped bolt that directly fixes the lid 67 covering the case 66 to the stay.

  FIG. 9 is a front sectional view of the exhaust valve of the exhaust control device according to the present invention. The pulley 63 includes a first fitting portion 81 for fitting a cable end 79 attached to the tip of the inner cable 13a of the working wire 13, and A second fitting portion 82 for fitting a cable end 89 attached to the tip of the inner cable 14a of the working wire 14 is formed. Reference numerals 13b and 14b denote outer tubes of the operating wires 13 and 14, respectively, and G denotes the ground.

  The stopper receiver 65 locks the stopper piece 64 when the valve 61 is opened and the first locking portion 83 that locks the stopper piece 64 when the valve 61 (see FIG. 8) is opened. The second locking portion 84 is provided, and the first locking portion 83 is set at a position having a margin of 10 ° counterclockwise from the fully opened state of the valve 61. 2 The stopper piece 64 is applied to the locking portion 84 so that the valve 61 is fully closed from the fully closed position to a position with a margin of 10 ° clockwise.

  That is, a first locking portion 83 that locks the stopper piece 64 when the valve 61 is opened and a second locking portion that locks the stopper piece 64 when the valve 61 is closed. By providing 84, the valve position can be regulated in the valve opening direction and the valve closing direction. As a result, the first locking portion 83 or the second system support portion 84 can be used as a stopper when the pulley 63 is attached to the valve 61, and the assembly of the exhaust valve 12 can be improved.

  In the exhaust control device 11 (see FIG. 6), an engine 211 is mounted on a vehicle body frame 110, an exhaust pipe 39 is connected to the engine 211, and an exhaust valve 12 for controlling the flow rate of exhaust gas is provided in the exhaust pipe 39. In the motorcycle 10 (see FIG. 2), the exhaust valve 12 is provided with a valve 61 for changing the flow rate of the exhaust gas in the exhaust pipe 39, a valve rod 62 for attaching the valve 61, and a pulley 63 for rotating the valve rod 62. The pulley 63 includes a stopper piece 64 that is formed separately from the pulley 63 and is attached to the valve rod 62, and a stopper receiver 65 that restricts the opening / closing angle of the valve 61 by applying the stopper piece 64. It can be said.

  If the shape of exhaust valve components such as pulleys can be simplified, it is preferable to improve the productivity of exhaust valve components.

  Therefore, by forming the stopper piece 64 separately from the pulley 63 and providing the stopper receiver 65 against which the stopper piece 64 is applied, the exhaust valve components such as the pulley 63 can be made into a simple shape. As a result, the productivity of exhaust valve components can be improved.

  The case 66 includes an attachment surface 85 for attaching the operating wires 13 and 14, an inclined surface 86 that is inclined with respect to the attachment surface 85, and a drain pipe 87 that drains the case 66 by being attached to the inclined surface 86. A case bearing portion 88 that rotatably supports the middle of the valve rod 62 is provided, and the drain pipe 87 is cut so that the tip 87 a is along the inclined surface 86.

  Generally, the exhaust pipe has many parts inclined forward or rearward with respect to the ground, and when the exhaust valve is attached to the part inclined forward or backward, it may be attached with the exhaust valve inclined. Many. It is also known that the operating wire is often drawn almost upward from the exhaust valve.

In view of this, the case 66 of the exhaust valve 12 is provided with a mounting surface 85 for the operating wires 13 and 14, and an inclined surface 86 inclined to the side facing the mounting surface 85 is provided, and the drain pipe 87 drains water from the inclined surface 86. Were connected, and the end 87a of the drain pipe 87 was placed along the inclined surface 86.
That is, if the exhaust valve 12 is mounted in an inclined posture and the operating wires 13 and 14 are pulled out substantially upward, the inclined surface 86 becomes substantially parallel to the ground, so that the water in the case 66 can be drained accurately. Moreover, ground clearance can be earned by making the front-end | tip 87a of the drain pipe 87 along the inclined surface 86. FIG.
In addition, since the drain pipe 87 for draining water is connected to the inclined surface 86, it is possible to prevent backflow of water and to prevent water from entering from the front.
Furthermore, by providing the tip of the drain pipe 87 along the inclined surface 86, the ground clearance can be earned and the influence on the bank angle can be minimized.

  FIG. 10 is a plan sectional view of the exhaust valve of the exhaust control device according to the present invention. The exhaust valve 12 inserts the other end 62 b of the valve rod 62 into the through holes 71, 72 of the valve mounting portion 43. The valve 61 is attached to the other end 62b via bolts 75 and 75 through a seat plate 75a, the case bearing portion 88 of the case 66 is inserted from one end 62a (see FIG. 8) side of the valve rod 62, and the stay of the valve mounting portion 43 is By fixing the case 66 to 74, the valve rod 62 can be rotatably supported by the bearing portion 73 and the case bearing portion 88. Further, the seat plate 75a is formed with rotation-preventing portions 72b... That can be bent later, and the rotation-preventing portions 72b.

Next, the movement of the exhaust valve 12 of the exhaust control device 11 will be described.
11 (a) and 11 (b) are explanatory views of the operation of the exhaust control device for a motorcycle according to the present invention.
In (a), the exhaust valve 12 set in the open state is shown, and the stopper piece 64 is stopped at a position having a margin of an angle θ (about 10 °) with respect to the first locking portion 83 of the stopper receiver 65. Indicates. As described above, since the valve 61 is urged in the opening direction by the torsion spring 68 (see FIG. 9), for example, even when an unexpected situation such as loosening occurs in the operating wires 13, 14, the first engagement Since the stopper piece 64 hits the stopper 83 and the exhaust valve 12 can be kept almost open, the exhaust gas is not hindered from being discharged.

  In (b), the servo motor 15 (see FIG. 6) is driven, the operating wire 13 is pulled as shown by the arrow a1, the operating wire 14 is loosened as shown by the arrow a2, and the pulley 63 is rotated as shown by the arrow a3. 12 is closed. In the closed state of the exhaust valve 12, the stopper piece 64 is stopped at a position having an angle θ (about 10 °) with respect to the second locking portion 84 of the stopper receiver 65.

  The second locking portion 84 is used when the stopper piece 64 and the pulley 63 are fitted to the two-surface width portion 68a (see FIG. 8) of the one end 62a of the valve rod 62, and the nut 69 is screwed into the male screw portion 59 of the one end 62a. Can be used as a stopper. As a result, the assembly of the exhaust valve can be improved.

  12 is a perspective view seen from the rear upper part of the motorcycle exhaust control apparatus according to the present invention, the servo motor 15 is a motor body 181 and a motor connected to the motor body 181 via a gear train (not shown). The side pulley 182 includes a motor case 183 that covers these gear trains, and a motor cover 184 that covers the motor case 183. Reference numeral 185 denotes a front end portion of the servo motor 15, 186 denotes a rear end portion of the servo motor, and 187 denotes a motor bracket for attaching the servo motor 15 to the left seat rail 115.

  13 is a perspective view showing a rear side surface of the exhaust control device for a motorcycle according to the present invention, in which an engine 211 (see FIG. 6) is mounted on a vehicle body frame 110 (see FIG. 4), and an exhaust pipe 39 is mounted on the engine 211. In the motorcycle 10 (see FIG. 2) which is connected and has the muffler 34 (see FIG. 7) attached to the exhaust pipe 39, the exhaust pipe 39 is exhausted in the vicinity of the connection portion 44 between the exhaust pipe 39 and the muffler 34 and on the exhaust pipe 39 side. It shows that an exhaust valve 12 for controlling the gas flow rate is provided.

  For example, by attaching different mufflers to one type of motorcycle, if you have multiple models of motorcycles of the same system and want to respond to user preferences, you should be able to replace only the muffler, This is preferable for improving the workability of replacement or reducing the cost of the muffler to be replaced.

Therefore, the exhaust valve 12 that controls the flow rate of the exhaust gas is provided near the connection portion 44 between the exhaust pipe 39 and the muffler 34 (see FIG. 6) and on the exhaust pipe 39 side, thereby affecting the exhaust valve 12. The muffler 34 can be replaced without any trouble.
As a result, the workability of the muffler replacement can be improved, and the cost of the muffler 34 to be replaced can be reduced.

  FIG. 14 is a plan view showing the positional relationship between the servo motor and the control unit of the exhaust control device for a motorcycle according to the present invention. The exhaust control device 11 (see FIG. 6) includes a body frame 110, an air cleaner case 192 and an engine 211. The exhaust pipe 39 is connected to the engine 211, the exhaust valve 12 for controlling the flow rate of the exhaust gas is provided in the exhaust pipe 39, and the seat 208 is disposed above the engine 211. In the motorcycle 10 provided with the seat cowl 29, the operation wires 13 and 14 are arranged along the air cleaner case 192 in order to open and close the exhaust valve 39, and the servo motor 15 is used to drive the operation wires 13 and 14. It can be said that it is arranged at a part that can be covered with the seat cowl 29.

  For example, it is preferable to improve the space efficiency of the vehicle body if it is possible to route the operation cable well and to arrange the servo motor and the control unit by effectively using the space.

  The air cleaner case 192 is a static (no moving part) member. By disposing the operation wires 13 and 14 along the air cleaner case 192, the operation cables 13 and 14 can be accommodated and routed well. Further, by arranging the servo motor 15 in a portion that can be covered with the seat cowl 29, the vacant space can be used effectively and the space efficiency of the vehicle body can be improved.

In general, the rear part of the seat cowl has a narrowed shape.
Therefore, the servo motor 15 is disposed at the rear portion of the seat cowl 29 (see FIG. 2) and is inclined so as to approach the vehicle body center from the front end portion 185 of the servo motor 15 toward the rear end portion 186 in plan view. By doing so, the servo motor 15 can be disposed without causing the seat cowl 29 to bulge out.

In addition, the control unit 16 that controls the opening degree of the exhaust valve is disposed to face the servo motor 15.
By disposing the control unit 16 so as to face the servo motor 15, the control unit 16 and the servo motor 15 can be dispersed. As a result, it is possible to further improve the space efficiency of the vehicle body.
The control unit 16 has a holder 188 attached to the left seat rail 115 and a housing 189 of the control unit 16 attached to the holder 188.

  FIG. 15 is a plan view showing the positional relationship between the swing arm and the exhaust valve of the exhaust control device for a motorcycle according to the present invention. The exhaust control device 11 (see FIG. 6) is configured to move the swing arm 19 up and down on the vehicle body frame 110. In the motorcycle 10 in which the engine 211 is mounted on the vehicle body frame 110, the exhaust pipe 39 is connected to the engine 211, and the muffler 34 is attached to the exhaust pipe 39, the exhaust gas is disposed on the exhaust pipe 39 side. It can be said that an exhaust valve 12 for controlling the flow rate of the exhaust gas is provided, a recess 18 toward the center of the vehicle body is formed on the swing arm 19 side, and the exhaust valve 12 faces the recess 18.

  For example, if the exhaust valve of an exhaust control device for a motorcycle can be arranged in the exhaust pipe without increasing the vehicle width, it is preferable from the viewpoint of effectively using the layout space.

  That is, the swing arm 19 is provided with a recess 18 and the exhaust valve 12 faces the recess 18 so that the exhaust valve 12 can be moved toward the center of the vehicle body without increasing the vehicle width. 6) can be arranged in the exhaust pipe 39.

  In addition, since the operating wires 13 and 14 for operating the exhaust valve 12 also face the concave portion 18 side, the operating wires 13 and 14 can be pulled out from the exhaust valve 12 without protruding outside the vehicle width.

  FIG. 16 is an operation explanatory view showing the mounting angle of the exhaust valve of the exhaust control device for a motorcycle according to the present invention. The exhaust control device 11 is an automatic control system in which an exhaust valve for controlling the flow rate of exhaust gas is provided in the exhaust pipe 39. In the two-wheeled vehicle 10, when an angle at which the vehicle body can be tilted to the maximum in the vehicle width direction is referred to as a maximum allowable bank angle θ1, the exhaust valve 12 It can be said that the valve stem (shaft) 62 is arranged substantially in parallel.

  For example, it is a matter to be considered when an exhaust valve is provided in an exhaust pipe so that a sufficient ground clearance can be secured and an operation wire can be easily pulled out.

  By disposing the valve rod (shaft) 62 of the exhaust valve 12 substantially parallel to the ground surface C when the vehicle body is tilted to the maximum allowable bank angle θ1, the overhang of the exhaust valve 12 can be suppressed, and the maximum allowable bank The exhaust valve 12 can be disposed inside the corner, and the operating wires 13 and 14 (the back 14 is not shown) can be easily pulled out from the exhaust valve.

17 (a) and 17 (b) are detailed views of the stopper receiver of the exhaust valve of the exhaust control device for a motorcycle according to the present invention.
In (a) and (b), the stopper receiver 65 locks the main body 65a attached to the case 66 (see FIG. 9) and the stopper piece 64 (see FIG. 9) by bending the main body 65a. It is the member comprised from the 2nd latching | locking part 84 which latches the stopper piece 64 (refer FIG. 9) by welding to the main-body part 65a.

FIGS. 18A and 18B are detailed views of a stopper piece of an exhaust valve of the exhaust control device for a motorcycle according to the present invention.
In (a) and (b), the stopper piece 64 includes a long hole 64a to be fitted into the two-surface width portion 68a of the valve rod 62 (see FIG. 8) and a first locking of the stopper receiver 65 (see FIG. 17). This is a member composed of a contact part 64 b applied to the part 83 and a contact part 64 c applied to the second locking part 84 of the stopper receiver 65.

In the embodiment, as shown in FIG. 7, the exhaust pipe 39 is composed of the two pipes 31, 32 and the exhaust collecting pipe 33. However, the present invention is not limited to this, and the exhaust pipe 39 is composed of only one pipe. The two pipes are connected to the first exhaust collecting pipe and the other two pipes are connected to the second exhaust collecting pipe, and these first and second exhaust collecting pipes are connected. An exhaust pipe having a connecting pipe for connecting the pipes may be used.
In other words, the number of pipes extending from the engine cylinder is arbitrary, and the connection of these pipes is also arbitrary. The exhaust pipe is connected to the exhaust pipe and the muffler in the vicinity of the exhaust pipe side. What is necessary is just to provide the exhaust valve which controls the flow volume of gas.

  In the embodiment, as shown in FIG. 11, the stopper piece 64 is stopped at a position having an angle θ (play angle) with respect to the first locking portion 83 of the stopper receiver 65, and the stopper piece 64 is stopped. However, the present invention is not limited to this, but the play angle of the stopper piece 65 with respect to the first lock member 83, The play angle of the stopper piece 65 with respect to the two locking members 84 is not necessarily the same.

  The vehicle body structure of the motorcycle of the present invention is suitable for use in a motorcycle equipped with a multi-cylinder engine.

1 is a left external view of a motorcycle equipped with an exhaust control device according to the present invention. 1 is a right external view of a motorcycle equipped with an exhaust control device according to the present invention. 1 is a side sectional view of a motorcycle equipped with an exhaust control device according to the present invention. 1 is a perspective view of a body frame of a motorcycle equipped with an exhaust control device according to the present invention. 1 is a left side view of an engine, a power transmission mechanism, and a seat of a motorcycle equipped with an exhaust control device according to the present invention. 1 is a side view of an exhaust control device for a motorcycle according to the present invention. It is a disassembled perspective view of the exhaust system apparatus carrying the exhaust control apparatus which concerns on this invention. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. It is front sectional drawing of the exhaust valve of the exhaust control apparatus which concerns on this invention. It is a top sectional view of the exhaust valve of the exhaust control device according to the present invention. FIG. 6 is an operation explanatory diagram of an exhaust control device for a motorcycle according to the present invention. FIG. 3 is a perspective view of the motorcycle exhaust control apparatus according to the present invention as viewed from the upper rear side. 1 is a perspective view showing a rear side surface of an exhaust control device for a motorcycle according to the present invention. FIG. 3 is a plan view showing a positional relationship between a servo motor and a control unit of the exhaust control device for a motorcycle according to the present invention. FIG. 2 is a plan view showing the positional relationship between the swing arm and the exhaust valve of the motorcycle exhaust control apparatus according to the present invention. FIG. 6 is an operation explanatory view showing an attachment angle of an exhaust valve of an exhaust control device for a motorcycle according to the present invention. FIG. 3 is a detailed view of a stopper receiver of an exhaust valve of the exhaust control device for a motorcycle according to the present invention. FIG. 3 is a detailed view of a stopper piece of an exhaust valve of the exhaust control device for a motorcycle according to the present invention. FIG. 6 is a reprint of FIG. 6 of Patent Document 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 11 ... Exhaust control device, 12 ... Exhaust valve, 13, 14 ... Actuation wire, 15 ... Servo motor, 16 ... Control part (ECU), 18 ... Recessed part, 19 ... Swing arm, 29 ... Seat cowl, 34 ... Muffler, 35 ... Muffler protector, 39 ... Exhaust pipe, 44 ... Connection part, 49 ... Cover part, 58 ... Mounting part, 61 ... Valve, 62 ... Shaft (valve rod), 63 ... Pulley, 64 ... Stopper piece, 65 ... stopper receiver, 66 ... case, 68 ... torsion spring, 83,84 ... first and second locking portions, 85 ... mounting surface, 86 ... inclined surface, 87 ... drain pipe, 87a ... tip, 110 ... body frame 185 ... Front end, 186 ... Rear end, 192 ... Air cleaner case, 197 ... Waterproof wall, 208 ... Seat, 211 ... Engine, .theta.1 ... Maximum allowable bank angle, C ... Ground when the vehicle body is tilted Surface.

Claims (3)

In a motorcycle in which an engine is mounted on a body frame, an exhaust pipe is connected to the engine, and an exhaust valve for controlling the flow rate of exhaust gas is provided in the exhaust pipe.
The exhaust valve is formed separately from a valve for changing the flow rate of the exhaust gas in the exhaust pipe, a valve rod for mounting the valve, a pulley for rotating the valve rod, and the pulley. An exhaust control device for a motorcycle, comprising: a stopper piece to be attached; and a stopper receiver for restricting an opening / closing angle of the valve by applying the stopper piece.   A first locking portion for locking the stopper piece when the valve is moved in the opening direction, and a second locking for locking the stopper piece when the valve is moved in the closing direction. The exhaust control device for a motorcycle according to claim 1, further comprising a portion. The exhaust control device for a motorcycle according to claim 1 or 2, wherein a torsion spring for biasing in the valve opening direction is interposed between the pulley and the stopper receiver.

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