JP5017194B2 - Vehicle exhaust control device - Google Patents

Description

  The present invention relates to an exhaust control device for a vehicle provided with an exhaust valve in an exhaust pipe.

2. Description of the Related Art There is known a vehicle exhaust control device that includes an exhaust pipe, a tail pipe that is provided at a tip portion of the exhaust pipe, and exhaust is discharged to the atmosphere, and an exhaust valve that is provided in the tail pipe (for example, , See Patent Document 1).
Japanese Patent No. 4050975 (FIG. 6)

  In FIG. 6 of Patent Document 1, an exhaust passage 73 serving as a tail pipe through which exhaust gas is discharged to the atmosphere is provided in a silencer 45 (symbol is diverted from the same publication) as a component of the exhaust pipe. An exhaust control valve 74 is provided in the exhaust passage 73.

  The exhaust control valve 74 is disposed outside the silencer 45, but in order to improve the appearance of the vehicle, the exhaust control valve 74 is connected to the outer wall pipe 169 as an outer cylinder of the silencer 45 by the tail cover 168. 74 was entirely covered.

  However, in the technique of Patent Document 1, since the exhaust control valve 74 is entirely covered with the tail cover 168, the size of the silencer 45 is increased. In addition, the weight of the silencer 45 increases. Since the size of the silencer 45 is increased, there is a problem that it is difficult to concentrate the vehicle mass.

  It is an object of the present invention to provide a technology for reducing the size and weight of a silencer and, at the same time, concentrating the vehicle mass in a vehicle exhaust control device having an exhaust control valve in the silencer. To do.

The invention according to claim 1 is a vehicle body frame, an internal combustion engine provided in the vehicle body frame, an exhaust pipe extending from the internal combustion engine, a silencer connected to a tip of the exhaust pipe and reducing exhaust noise, In an exhaust control device for a vehicle having an exhaust valve that enables opening / closing adjustment of the outlet of the tail pipe of the silencer, the exhaust valve swings the valve body in contact with the outlet of the tail pipe An exhaust valve cover as a decorative cover is integrally attached to the outer surface of the valve body, and covers the valve body support mechanism in a plan view on the top of the silencer. An upper cover is provided, and the silencer includes a case body, a separator provided inside the case body, and a rear plate provided behind the separator and closing the rear part of the case body,
An exhaust valve cover that covers the tail pipe that constitutes the exhaust outlet together with the valve body so as to be able to be opened and closed is disposed on the upper portion of the rear plate. The rear plate is inclined forward with respect to the vertical direction. The shaft portion, a spring that biases the valve body in a direction to close the tail pipe, and a valve body drive wire provided integrally with the shaft portion are attached, and the shaft portion is rotated by the pulling force of the valve body drive wire. And a rotating member fixed to the shaft so as to be moved, and a valve body support mechanism is disposed between the rear plate and the upper cover .

The invention according to claim 2 is characterized in that a hole through which the valve element drive wire is inserted is provided in the upper cover .

  According to a third aspect of the present invention, a rear cover is disposed on the side of the tail pipe, the rear cover is provided with a cutout portion that becomes an opening of the exhaust valve cover, and the exhaust valve cover has an exhaust valve. In the closed state, it is arranged in the notch.

  In the invention according to claim 4, the tail pipe includes a first tail pipe and a second tail pipe, and the exhaust valve is provided in one of the first tail pipe and the second tail pipe. It is characterized by that.

In the invention according to claim 1, the exhaust valve includes a valve body and a valve body support mechanism, and the exhaust valve cover is integrally attached to the outer surface of the valve body.
An exhaust valve cover that opens and closes as the valve body opens and closes is attached to the exhaust valve. Therefore, compared to a tail cover that covers the entire exhaust valve, the silencer is downsized and the weight associated with the silencer is reduced. Can be made. If the silencer is downsized, it is possible to easily concentrate the vehicle mass.

  In addition, since the exhaust valve cover is attached to the exhaust valve, the opening and closing of the exhaust valve can be visually confirmed from the outside, and the appearance can be expected to be improved by the design.

Moreover , since the upper cover which covers a valve body support mechanism is provided in the upper part of the silencer, rain etc. can be made hard to hit a hinge part directly because this upper cover plays the role of a kite.
In addition, even when force is applied to the top of the silencer, it can be received by the top cover. That is, the exhaust valve can be protected from rain, other foreign matters, external force, and the like.
Moreover, it can also contribute to the improvement of appearance.

  In the invention according to claim 3, since the exhaust valve cover is disposed in the notch when the exhaust valve is closed, it is possible to prevent an object from hitting the exhaust valve and to protect the exhaust valve. be able to.

In the invention according to claim 4, the tail pipe includes a first tail pipe and a second tail pipe, and the exhaust valve is provided in one of the first tail pipe and the second tail pipe. . That is, the other tail pipe is always open.
Since the other tail pipe is always open, the exhaust valve provided in one tail pipe can be opened when necessary according to the output and the like.

  If one tail pipe is equipped with an exhaust valve, the exhaust valve drive system can save power compared to a structure with a single tail pipe and the exhaust valve is always in operation. Can be performed more easily.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the figure, “up”, “down”, “left”, “right”, “front”, and “rear” are directions viewed from the occupant seated in the vehicle. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a left side view of a motorcycle equipped with a V-type four-cylinder engine according to the present invention. A motorcycle 10 as a vehicle is provided with a body frame 11.
The vehicle body frame 11 includes a head pipe 12, a main frame 14 that extends rearward from the head pipe 12 and supports an upper portion and a rear portion of an engine 13 as an internal combustion engine, and a passenger seat that extends rearward from the rear end upper portion of the main frame 14. 15 and a rear frame 19 for attaching an electrical component such as a battery 16 and supporting a rear part 18 of the vehicle body including the rear fender 17.

  The head pipe 12 is provided with a front fork 24, a front wheel 25 is attached to the lower end portion of the front fork 24, and a steering handle 26 for steering the front wheel 25 is provided at the upper end portion of the front fork 24.

  A pivot shaft 27 is provided at the rear portion of the main frame 14, and a rear swing arm 28 extends rearward from the pivot shaft 27, and a rear wheel 31 driven by the engine 13 is provided at the tip of the rear swing arm 28. It is attached. The rear wheel 31 is driven by a drive shaft 32 that connects the engine 13 and the rear wheel 31.

An engine 13 (hereinafter also referred to as “V-type 4-cylinder engine 13”) is mounted on the body frame 11, and the V-type 4-cylinder engine 13 is provided with an exhaust device 33.
The V-type four-cylinder engine 13 includes a crankcase 37, a front cylinder 35 extending obliquely forward and upward with a crankshaft 34 provided in the crankcase 37 as a center, and extending obliquely rearward and upward with the crankshaft 34 as a center. The rear cylinder 36 is arranged in a V shape.

  In the figure, 41 is a radiator unit for cooling the engine 13, 42 is a front disc brake unit provided on the front fork, 43 is a front master cylinder provided on the steering handle, 44 is a fuel tank attached to the main frame 14, and 45 is a rear tank. Passenger steps attached to the frame 19, 46 is a front fender, 47 is a cowl, 48 is a mirror, 49 is a rear disc brake unit, 51 is a main stand, and 52 is a side stand.

FIG. 2 is a bottom view of a motorcycle on which a V-type four-cylinder engine according to the present invention is mounted, and will be described with reference to FIG.
The left and right front exhaust pipes 61L and 61R are connected to the front cylinder 35 (front cylinder block 35) of the V-type four-cylinder engine 13, and these front exhaust pipes 61L and 61R constitute the lower part of the engine 13. After extending below the crankcase 37, it extends rearward and is assembled in one front collecting pipe 62 provided below the crankcase 37. The front collecting pipe 62 is connected to a catalyst pipe 63 disposed below the crankcase 37. The catalyst tube 63 is for removing, for example, nitrogen oxides contained in the exhaust gas. The catalyst tube 63 is disposed adjacent to the oil pan portion 64.

  Since the catalyst pipe 63 is provided adjacent to the oil pan portion 64 projecting below the engine 13, the dead space can be used effectively, the catalyst pipe 63 can be arranged more compactly, and the concentration of the vehicle mass Can be achieved.

  The rear cylinder 36 of the V-type four-cylinder engine 13 is connected with two left and right rear exhaust pipes 71L and 71R. The rear exhaust pipes 71L and 71R are connected to the first rear exhaust pipes 72L and 72R extending rearward of the rear cylinder and the tips of the first rear exhaust pipes 72L and 72R, and are connected to the crankcase of the engine 13. 37, and includes second rear exhaust pipes 73L and 73R that extend forward and are connected to one rear collecting pipe 74 after extending forward.

  The rear collecting pipe 74 extends forward and is connected to an expansion pipe 75 formed in a substantially U shape in a bottom view, and the expansion pipe 75 is disposed behind the catalyst pipe 63 via the catalyst pipe 63. Connected to the collecting pipe 76.

The expansion pipe 75 has a pipe diameter larger than the pipe diameter of the rear collecting pipe 74 and attenuates the pressure wave of the exhaust. Details of the expansion tube 75 will be described later.
In the present embodiment, it is provided between the expansion pipe 75, the rear collecting pipe 74 and the whole collecting pipe 76, but it may be provided between the front collecting pipe 62 and the whole collecting pipe 76.

  FIG. 3 is a right side view of an essential part of a motorcycle on which the V-type four-cylinder engine according to the present invention is mounted. The rear side extends below the crankcase 37 constituting the lower part of the engine 13 and extends rearward. A rear collecting pipe 74 that collects and connects the side exhaust pipes 71L and 71R is disposed. After that, the above-described expansion pipe 75 is connected to the collecting pipe 74, and the catalyst pipe 63 is connected to the expansion pipe 75. A general collecting pipe 76 is connected to 63, and a muffler 81 extending to the front and rear of the vehicle on the right side of the rear wheel 31 is connected to the general collecting pipe 76. 82 is a step bracket and 83 is a foot brake pedal.

FIG. 4 is a plan view of an exhaust control device provided in a motorcycle according to the present invention, and will be described with reference to FIGS. 1 and 2 together.
The exhaust control device 110 includes the exhaust device 33 described above.
The exhaust control device 110 connects the front exhaust pipes 61L and 61R to the front cylinder 35 provided in the engine 13, and connects the rear exhaust pipes 71L and 71R to the rear cylinder 36, and connects the front exhaust pipes 61L and 61R to the front collecting pipe. 62, the rear exhaust pipes 71L and 71R are assembled into a rear collection pipe 74 extending forward in the longitudinal direction of the vehicle, and the rear collection pipe 74 is connected to an expansion pipe 75 having a substantially U shape in plan view. The expansion pipe 75 and the front collecting pipe 62 are once concentrated on the catalyst pipe 63, and the catalyst pipe 63 is connected to and aggregated with the whole collecting pipe 76. A device 81 is connected, and an exhaust valve 113 is attached to the silencer 81.
The exhaust pipe 114 includes front exhaust pipes 61L and 61R, a front collecting pipe 62, rear exhaust pipes 71L and 71R, a rear collecting pipe 74, an expansion pipe 75, a catalyst pipe 63, and an entire collecting pipe 76.

The front collecting pipe 62 and the rear collecting pipe 74 are connected to a catalyst pipe 63 containing a catalyst below the V-type four-cylinder engine 13. The catalyst pipe 63 is connected to the upstream inlet of the general collecting pipe 76, and the general collecting pipe 76 extends rearward and is connected to the silencer 81.
In the figure, reference numeral 117 denotes a protective cover that covers the lower side of the catalyst pipe 63, and 118a and 118b denote sensor ports into which oxygen sensors are inserted.

Since the rear collecting pipe 74 extends forward in the longitudinal direction of the vehicle and is connected to the catalyst pipe 63 together with the front collecting pipe 62 below the engine 13, a catalyst pipe is connected to each of the front collecting pipe 62 and the rear collecting pipe 74. Compared with the case of providing the exhaust device 33, the exhaust device 33 can be configured by one catalyst tube 63. If the exhaust device 33 can be completed with a single catalyst tube, the cost of the device can be reduced.
In addition, since the front and rear collecting pipes 62 and 74 are connected to the catalyst pipe 63 below the engine 13, it is possible to reduce the center of gravity of the vehicle and concentrate the mass.

The expansion pipe 75 includes a bent portion 95 that bends in a U shape in plan view, and the rear collecting pipe 74 is gathered in the catalyst pipe 63 together with the front collecting pipe 62 at the catalyst pipe 63 that is downstream of the bent portion 95.
Since the expansion pipe 75 is provided, the exhaust gas input to the expansion pipe 75 is expanded by the expansion pipe 75, and the energy of the exhaust gas is attenuated by the expansion. If the energy of the exhaust is attenuated, the pressure wave is reduced, and the pressure wave transmitted to the other exhaust pipe can be attenuated.

  Therefore, in a multi-cylinder engine in which the ignition timing of each cylinder is different, when a collecting pipe is used, an expansion pipe is interposed in the collecting pipe so that the influence of pressure waves caused by the exhaust of a certain cylinder is spread to other exhaust pipes. Can be difficult.

  FIG. 5 is a plan view of an essential part of the exhaust control device for a vehicle according to the present invention, and an upper cover 123 is disposed above the silencer 81. The upper cover 123 covers a part of the exhaust valve cover 122 and the vicinity thereof.

  FIG. 6 is a view for explaining an exhaust control device for a vehicle including the internal structure of the silencer according to the present invention. However, the exhaust valve cover (reference numeral 122 in FIG. 5) and the rear cover (reference numeral 153 in FIG. 5) are removed.

  The silencer 81 includes a case body 125, a front separator 126 provided inside the case body 125, a rear separator 127 provided behind the front separator 126, and a rear part of the silencer provided behind the rear separator 127. And a rear plate 121 that closes the rear portion of the case body 125 as a wall.

  By the front and rear separators 126 and 127, the inside of the case body 125 is partitioned into three chambers of a first chamber 131, a second chamber 132, and a third chamber 133 in order from the rear to the front. The front and rear separators 126 and 127 are perforated plates each having a large number of holes formed in a flat plate member so that exhaust can pass through these holes.

Further, the exhaust input port 135 to which the entire collecting pipe (reference numeral 76 in FIG. 5) is connected is provided with a base 136 as a connecting member, and a front pipe 137 that guides the exhaust to the first chamber 131 from the base 136 is the first. A first tail pipe 111A is provided that extends to the first chamber 131, connects the first chamber 131 and the outside, and guides the exhaust in the first chamber to the atmosphere, and connects the third chamber 133 and the outside. A second tail pipe 111B that guides the exhaust in the three chambers to the atmosphere is provided. An exhaust valve 113 is attached to the first tail pipe 111A.
In the figure, 141 is a stay attached to the other person's frame side, and 142 is a reinforcement pipe that reinforces the case body 125. Details of the reinforcing pipe 142 will be described later.

  That is, the tail pipe 111 as an exhaust outlet includes a first tail pipe 111A as one tail pipe and a second tail pipe 111B as the other tail pipe, and the exhaust valve 113 is provided in the first tail pipe 111A. It has been. The second tail pipe 111B is always open.

If the second tail pipe 111B is always open, the exhaust valve provided in the first tail pipe 111A may be opened only when necessary.
Since the exhaust valve 113 is provided only in the first tail pipe 111A, the power consumption of the exhaust valve drive system can be reduced compared to a structure in which the exhaust valve is always operated with a single tail pipe. Appropriate valve control can be performed more easily. In addition, since the operating rate is kept low, the durability of the exhaust valve drive system can be enhanced.
The exhaust valve may be provided in the second tail pipe 111B instead of the first tail pipe 111A.

FIG. 7 is an explanatory diagram of the operation of FIG.
In (a), the flow of exhaust gas when the amount of exhaust gas is larger than a predetermined value will be described, and the exhaust valve 113 is opened.
Exhaust gas (1) input from the base 136 passes through the front pipe 137 and enters the first chamber 131, and most of the exhaust gas is guided as indicated by arrows (11) and (12) and is externally supplied from the first tail pipe 111A. To be discharged.

  Part of the exhaust gas is turned in the direction of the arrow (2) in the first chamber 131, and the porous portion 127h (... indicates a plurality; the same applies hereinafter) opened in the rear separator 127 is indicated by the arrow (3). ), And passes through the porous portion 126h... Opened in the front separator 126 as indicated by an arrow (4) and enters the third chamber 133. In the third chamber 133, as indicated by an arrow (5). It turns, passes through the second tail pipe 111B, and is discharged to the outside as indicated by an arrow (6). In this case, most of the exhaust discharged from the engine 13 is released to the atmosphere without passing through the second chamber 132 and the third chamber 133, so that the resistance related to the exhaust can be reduced.

In (b), the flow of exhaust when the amount of exhaust is below a predetermined value will be described, and the exhaust valve 113 is closed.
Exhaust gas (1) input from the base 136 passes through the front pipe 137, enters the first chamber 131, turns in the direction of the arrow (2) in the first chamber 131, and is opened in the rear separator 127. .. Passes through the porous portion 126h... Opened in the front separator 126 as shown by the arrow (4) and enters the third chamber 133. In the third chamber 133, It turns as shown in (5), passes through the second tail pipe 111B, and is discharged to the outside as shown by arrow (6). In this case, since all the exhaust gas passes through the third chamber 133 from the first chamber 131, a high silencing effect can be obtained.

  FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 5, and the case body 125 provided in the silencer 81 is a structure in which the inner shell 144 and the outer shell 145 are abutted. The reinforcing pipe 146 as a reinforcing member is a member that is stretched between the outer shell 145 and the inner shell 144 of the case body 125, and can greatly enhance the rigidity of the case body 125.

The procedure of welding assembly of the case body 125 and the reinforcing pipe 146 will be described below.
One end 146a of the reinforcing pipe 146 is applied to the outer shell 145 and welded, the outer shell 145 and the inner shell 144 are butted and welded, and the collar member 148 is welded to the other end 146b of the reinforcing pipe 146. The collar member 148 is welded to the inner shell 144 so as to close the hole 144h of the inner shell 144. Finally, the welding assembly is completed by a procedure of plugging and plugging the other end of the reinforcing pipe 146.

FIG. 9 is an exploded perspective view of the vehicle exhaust control device according to the present invention, and FIG. 10 is a perspective view of the vehicle exhaust control device according to the present invention. Hereinafter, description will be given with reference to FIGS.
The vehicle exhaust control device 110 includes a silencer 81 that reduces exhaust noise, and an exhaust valve 113 that allows the exhaust outlet 111Aa of the tail pipe of the silencer 81 to be adjustable. The exhaust valve 113 is attached to the side portion of the first tail pipe 111A.

  The exhaust valve 113 is a member that includes a valve body 151 that contacts the outlet 111Aa of the first tail pipe 111A as a tail pipe, and a valve body support mechanism 152 that supports the valve body 151 in a swingable manner.

  An exhaust valve cover 122 that covers the first tail pipe 111A constituting one exhaust outlet together with the valve body 151 so as to be able to be opened and closed is disposed on the rear plate 121 constituting the rear portion of the silencer 81. A second tail pipe 111B as the other exhaust outlet is disposed in the lower part.

  That is, an exhaust valve cover 122 as a decorative cover is integrally attached to the outer surface 151 s of the valve body 151. The valve body 151 is provided with an exhaust valve cover 122 that opens and closes so as to follow the opening / closing operation of the valve body 151.

  A rear cover 153 is attached to the rear plate 121 as a rear wall of the case body 125 from the rear. The rear cover 153 has a notch 154 in which the exhaust valve 113 is provided, and a hole 155 as an opening for the second tail pipe 111B below the notch 154, and covers the rear plate 121 from the rear. A member having a function as a decorative board. In the drawing, an imaginary line indicates a state where the exhaust valve cover 122 is opened.

  FIG. 11 is a bottom cross-sectional view of the first tail pipe provided in the vehicle exhaust control apparatus according to the present invention. Inner members 156a and 156b for holding glass wool W are attached to the inside of the case body 125. The vibration generated in the case body 125 is suppressed. Reference numeral 157 denotes a fastening member that integrates the valve body 151 and the exhaust valve cover 122.

FIG. 12 is a side sectional view of a first tail pipe provided in the exhaust control device for a vehicle according to the present invention, which will be described with reference to FIGS.
A rear cover 153 is disposed on the side of the tail pipe 111. The rear cover 153 is provided with a notch 154 serving as an opening of the exhaust valve cover 122. The exhaust valve cover 122 closes the exhaust valve 113. In that state, most of them are arranged in the notch 154.

  When the exhaust valve 113 is closed, most of the exhaust valve cover 122 is disposed in a notch 154 formed in the rear cover 153, so that it is possible to prevent an object or the like from hitting the exhaust valve 113. The exhaust valve 113 can be protected.

  Referring also to FIG. 5, the upper part of the silencer 81 is provided with an upper cover 123 so as to cover the valve body support mechanism 152 as a component of the exhaust valve 113 in a plan view. Since the cover 123 plays the role of a kite, rain or the like can be made difficult to directly hit the hinge portion.

  Even when a force is applied to the upper part of the silencer 81, it can be received by the upper cover 123. That is, the exhaust valve 113 can be protected from rain, other foreign matters, external force, and the like. In addition, it can contribute to the improvement of appearance.

FIG. 13 is a cross-sectional view for explaining the configuration of the exhaust valve according to the present invention, which will be described with reference to FIG.
The exhaust valve 113 is attached to the first tail pipe 111A, and includes a valve body 151 that comes into contact with the outlet 111Aa of the first tail pipe, and a valve body support mechanism 152 that supports the valve body 151 in a swingable manner. .

The valve body support mechanism 152 includes a holder part 161 that is arranged to open upward and is formed in a U-shape, a shaft part 163 that is rotatably pivoted on the left and right walls 161L and 161R of the holder part, A spring 164 provided in the portion 163 and energizing in a direction such that the valve body 151 closes the first tail pipe 111A, and a valve body driving wire 165 provided integrally with the shaft portion 163 are attached, and the valve body driving wire 165 is pulled. A rotating member 166 fixed to the shaft portion 163 so as to rotate the shaft portion 163 in the direction of the arrow a by force.
In the drawing, an imaginary line indicates a state in which the valve body 151 is in a position when the exhaust outlet 111Aa of the first tail pipe is closed.

  FIG. 14 is a plan view for explaining the arrangement relationship between the exhaust control device for a vehicle and the rear wheel according to the present invention. A rear portion of the silencer 81 is provided with a projecting portion 171 projecting to the rear wheel side. The overhanging portion 171 is disposed so as to protrude inward in the width direction of the tire T as a component of the rear wheel 31. For this reason, the dead space of the rear wheel 31 can be effectively used, the capacity of the silencer 81 can be increased, and the expansion of the vehicle width can be suppressed.

The operation of the vehicle exhaust control device described above will be described next.
Returning to FIG. 13, the exhaust valve 113 includes a valve body 151 and a valve body support mechanism 152, and an exhaust valve cover 122 is integrally attached to the outer surface 151 s of the valve body 151.
Conventionally, the exhaust valve provided at the exhaust outlet of the silencer has adopted a structure in which the entire exhaust valve including the valve body and the valve body support mechanism is covered with a tail cover. In such a structure, the tail cover may increase the size of the silencer and increase the weight of the silencer.

  In this regard, in the present invention, the exhaust valve 113 is attached with an exhaust valve cover 122 that opens and closes as the valve body 151 opens and closes. Therefore, the silencer 81 is smaller than the tail cover that covers the entire exhaust valve. And the weight of the silencer 81 can be reduced. If the silencer 81 is downsized, it is possible to easily concentrate the vehicle mass.

  In addition, since the exhaust valve cover 122 is attached to the exhaust valve 113, the opening and closing of the exhaust valve 113 can be visually recognized from the outside, and the appearance can be expected to be improved by the design. It is easy to impress a third party that the exhaust valve 113 is mounted, and the attractiveness of a product on which the exhaust valve 113 is mounted can be enhanced.

Although the present invention has been applied to motorcycles in the embodiments, it can also be applied to tricycles and four-wheeled vehicles, and can be applied to general vehicles.
In claim 1, the upper cover that covers the valve body support mechanism may be omitted.
In claim 2, the rear cover arranged on the side of the tail pipe may be omitted.

  INDUSTRIAL APPLICABILITY The present invention is suitable for a motorcycle equipped with an exhaust valve that enables opening and closing adjustment of the outlet of the tail pipe of the silencer.

1 is a left side view of a motorcycle equipped with a V-type four-cylinder engine according to the present invention. 1 is a bottom view of a motorcycle equipped with a V-type four-cylinder engine according to the present invention. 1 is a right side view of a main part of a motorcycle equipped with a V-type four-cylinder engine according to the present invention. 1 is a plan view of an exhaust control device provided in a motorcycle according to the present invention. It is a principal part top view of the exhaust control apparatus of the vehicle which concerns on this invention. It is a figure explaining the exhaust control device of vehicles including the internal structure of the silencer concerning the present invention. FIG. 7 is an operation explanatory diagram of FIG. 6. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 5. 1 is an exploded perspective view of an exhaust control device for a vehicle according to the present invention. 1 is a perspective view of an exhaust control device for a vehicle according to the present invention. It is a top sectional view of the 1st tail pipe with which the exhaust control device of vehicles concerning the present invention is provided. It is side part sectional drawing of the 1st tail pipe with which the exhaust control apparatus of the vehicle which concerns on invention is equipped. It is sectional drawing explaining the structure of the exhaust valve which concerns on this invention. It is a top view explaining the arrangement relation of the exhaust control device of vehicles concerning the present invention, and a rear wheel.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... 11 ... Body frame, 13, 13V ... Internal combustion engine (engine), 81 ... Silencer, 110 ... Exhaust control device, 111 ... Tail pipe, 111a ... Outlet, 111A ... First tail pipe, 111B ... Second tail Pipe 113 113 Exhaust valve 114 Exhaust pipe 122 Exhaust valve cover 123 Top cover 151 151 Valve body 151 s Valve body outer surface 152 Valve support mechanism 153 Rear cover 154 Notch Department.

Claims (4)

A body frame (11), an internal combustion engine provided on the vehicle body frame (11) (13), an exhaust pipe extending from the internal combustion engine (13) and (114), connected to the end of the exhaust pipe (114) The exhaust of a vehicle provided with a silencer (81) for reducing the exhaust noise and an exhaust valve (113) for adjusting the opening and closing of the outlet (111Aa) of the tail pipe (111A) of the silencer (81) In the control device,
The exhaust valve (113) includes a valve body (151) that contacts the outlet (111Aa) of the tail pipe (111A) , and a valve body support mechanism (152) that supports the valve body (151) so as to be swingable. Including
An exhaust valve cover (122) as a decorative cover is integrally attached to the outer surface (151s) of the valve body ,
At the top of the front Symbol silencer (81), in plan view, the upper cover (123) is provided to cover the valve body supporting mechanism (152),
The silencer (81) includes a case body (125), a separator (127) provided inside the case body (125), and a rear part of the separator (127), which covers the rear part of the case body (125). A rear plate (121),
An exhaust valve cover (122) that covers the tail pipe (111A) constituting the exhaust outlet together with the valve body (151) so as to be able to be opened and closed is disposed on the rear plate (121), and the rear plate (121) Is inclined forward with respect to the vertical direction,
The valve body support mechanism (152) includes a shaft portion (163), a spring (164) that biases the valve body (151) in a direction to close the tail pipe (111A), and the shaft portion (163). And a valve body drive wire (165) provided integrally with the shaft body (165), and fixed to the shaft section (163) so that the shaft section (163) is rotated by the pulling force of the valve body drive wire (165). A rotating member (166)
The rear plate (121) and said valve body supporting mechanism (152) vehicles of the exhaust control device you characterized in that is disposed between the upper cover (123). The exhaust control device for a vehicle according to claim 1 , wherein a hole through which the valve element drive wire (165) is inserted is provided in the upper cover (123) . On the side of the tail pipe (111), rear cover (153) is disposed on the rear cover (153), the opening and becomes the notch portion of the exhaust valve cover (122) (154) provided ,
The exhaust of the vehicle according to claim 1 or 2, wherein the exhaust valve cover (122) is disposed in the notch (154) when the exhaust valve (113) is closed. Control device. The tail pipe (111) includes a first tail pipe (111A) and a second tail pipe (111B), and the exhaust valve (113) includes the first tail pipe (111A) and the second tail pipe ( 111. The vehicle exhaust control device according to claim 1, wherein the exhaust control device is provided in one of the tail pipes of 111B) .

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