JP5266987B2 - Motorcycle exhaust system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust apparatus of a motorcycle capable of enhancing the installation work efficiency and mounting an exhaust control valve-cable-drive source on an engine body in a preliminarily adjusted state. <P>SOLUTION: The exhaust apparatus of the motorcycle includes: a motorcycle body frame 4 having at least a head pipe 2 and a pair of right and left main frames 3; an engine body 7 mounted on the body frame 4; a plurality of exhaust pipes 25, etc. fitted to the engine body 7; an exhaust manifold 26 for assembling the plurality of exhaust pipes 25, etc.; an exhaust control valve (a drive pulley 31) which is installed to the plurality of exhaust pipes 25, etc. or the exhaust manifold 26 to change the cross sectional area of an exhaust passage; an actuator 35 installed to the body frame 4 from the outer side; and a cable 32 which is connected to the exhaust control valve and the actuator 35 to transmit the drive of the actuator 35 to the exhaust control valve. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an exhaust device for a motorcycle in which an exhaust control valve that changes an exhaust mode according to an operating state of an engine body is arranged to ensure a desired output performance corresponding to a change in the operating state.

  2. Description of the Related Art Conventionally, in sports motorcycles with improved running performance, it has been important to secure a large bank angle in order to obtain high turning performance.

  In order to secure this bank angle, it is necessary to narrow the vehicle width dimension of the lower part of the engine body close to the road surface. Therefore, the oil pan is biased to one side and bulged downward, and the exhaust collection on the opposite side. A device that employs a layout for arranging the parts is well known.

  Also, in models with the engine body offset to the left with respect to the vehicle body, the oil pan is offset to the left, and the exhaust pipe extending from the engine body is placed on the side opposite to the oil pan (right side) and output to the exhaust collecting pipe It is well known that an exhaust control valve for controlling the engine to be optimized is provided.

  The exhaust control valve is driven by a drive source such as a motor or actuator via a cable or the like, and the drive source is disposed inside the vehicle body frame (tank rail) in consideration of improvement in appearance and mud splashing. .

  At this time, the layout of the drive source is greatly limited in layout due to the offset position of the engine body, and basically must be disposed on the side opposite to the engine offset. The drive source must be attached to the body frame before the engine body is mounted on the vehicle body, and the exhaust pipe is attached after the engine body is mounted, so the cable is separated from the exhaust pipe or drive source. Had to be configured.

Therefore, after installation of the exhaust pipe, adjust the cable length, wiring position, etc., or manage and adjust the drive source and exhaust control valve as a pair before separation, and return to the original combination (coupled) ) Method (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 02-162185

  However, in the motorcycle exhaust system configured as described above, for example, the cable adjustment method significantly reduces the production speed in the production line including the cable length adjustment work, and the separation / combination method separates. It is difficult to make the previous adjustment state and the adjustment after the combination coincide with each other, and in any case, the increase in the number of parts associated with the separation causes a cost increase.

  Furthermore, even if a drive source is attached to the engine offset side (left side), if the oil pan is present on the engine offset side (left side), the exhaust pipe including the exhaust control valve is on the side opposite to the engine offset side (right side). ) And the length of the cable connecting the drive source and the exhaust control valve is increased, and the wiring work is troublesome.

  In view of the above circumstances, the present invention provides a motorcycle exhaust system that can improve assembly workability and can be attached to the engine body with the exhaust control valve, cable, and drive source adjusted in advance. The purpose is to provide.

  An exhaust device for a motorcycle according to the present invention includes a vehicle body frame including at least a head pipe and a pair of left and right main frames, an engine body mounted on the vehicle body frame, and a plurality of exhaust pipes mounted on the engine body. An exhaust collecting pipe that collects the plurality of exhaust pipes, an exhaust control valve that is assembled to the plurality of exhaust pipes or the exhaust collecting pipe and changes a cross-sectional area of the exhaust passage, and is assembled to the vehicle body frame from the outside. A drive source, and a cable connected to the exhaust control valve and the drive source for transmitting the drive of the drive source to the exhaust control valve.

  According to the first aspect of the present invention, by assembling the drive source from the outside of the vehicle body frame, the cable can be routed through the outside of the vehicle body frame, and the cable does not straddle the vehicle body frame. The exhaust control valve, cable, and drive source can be attached to the engine body with the pre-adjusted state.

  The exhaust system for a motorcycle according to claim 2, wherein the pair of left and right main frames includes an engine suspension for supporting the engine main body, and the driving source is configured to have the engine suspension and the pair of left and right in a vehicle body side view. It is arranged in a region formed between any one of the main frames.

  According to the second aspect of the present invention, the drive source is arranged in a region between the engine suspension and the main frame without causing the drive source to protrude from the main frame in the vehicle width direction. It can be assembled and can contribute to the reduction of the vehicle width.

  The exhaust system for a motorcycle according to claim 3, wherein the exhaust collecting pipe is arranged to be deviated to one side in the left-right direction of the vehicle body with respect to a center line along the longitudinal direction of the vehicle body, and the drive source is the exhaust collecting pipe. It is arranged on the bias side.

  According to the invention described in claim 3, since the drive source and the exhaust control valve are arranged on the same side, the length of the cable can be shortened and the curvature of the cable can be increased. The sliding resistance can be reduced, and the power consumption of the drive source can be kept low.

  The exhaust system for a motorcycle according to claim 4, wherein an oil pan having an oil pan bulging portion adjacent to the exhaust collecting pipe formed below the center line so as to sandwich the center line is disposed at a lower portion of the engine body, The cable is characterized in that it is connected to the exhaust control valve outside the exhaust collecting pipe opposite to the oil pan bulging portion.

  According to the fourth aspect of the present invention, the cable can be routed without interfering with the downward bulging portion of the oil pan, and the exhaust control valve can be assembled to the vehicle body frame while ensuring the capacity of the oil pan. The property can be kept good.

  The exhaust system for a motorcycle according to claim 5, wherein a cable bracket for supporting the cable is attached to the plurality of exhaust pipes or the exhaust collecting pipe assembled with the exhaust control valve, and the cable bracket is an inner part of a vehicle body cowling. It is in contact with the wall surface.

  According to the fifth aspect of the present invention, not only the vehicle body cowling on the side where the downward bulging portion of the oil pan does not exist, but also can be reliably supported on the vehicle body side, and the cable support on the vehicle body cowling side. There is no need to arrange the members.

  The exhaust device for a motorcycle according to claim 6, wherein the cable bracket is integrally provided with a stopper arm that extends upward from the outside of the vehicle body so as to at least partially overlap the valve shaft of the exhaust control valve in a side view of the vehicle body. It is characterized by having.

  According to the sixth aspect of the present invention, the vehicle body cowling can be appropriately supported at a desired position by supporting the vehicle body cowling using the stopper arm formed integrally with the cable bracket.

  The exhaust system for a motorcycle according to claim 7, wherein the cable connected to the exhaust control valve and the drive source is sub-assembled to the plurality of exhaust pipes or the exhaust collecting pipe. It is characterized by being assembled in.

  According to the seventh aspect of the present invention, the assembly of the exhaust control valve to the vehicle body frame can be further improved, and it is not necessary to adjust the cable length after being mounted on the vehicle body, thereby shortening the assembly work time. Can contribute.

  If the engine suspension part is formed integrally with the vehicle body frame with a substantially triangular space between the vehicle frame and the drive source is arranged in the triangular space, the drive source is placed in the space. The mounting strength of the drive source can be easily secured, and the drive source can be protected from an impact when the vehicle body falls.

  The exhaust device for a motorcycle according to the present invention can improve the assembling workability, and can be attached to the engine body with the exhaust control valve, the cable, and the drive source already adjusted.

  Next, a motorcycle exhaust device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a left side view of a motorcycle equipped with an exhaust device according to an embodiment of the present invention, FIG. 2 is a left side view of the main part of the exhaust device of the motorcycle according to an embodiment of the present invention, and FIG. FIG. 4 is a perspective view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention, and FIG. 5 is a perspective view of the main part of the exhaust device for a motorcycle according to an embodiment of the present invention. FIG. 6 is an enlarged perspective view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention.

  As shown in FIGS. 1 to 4, a motorcycle 1 according to an embodiment of the present invention includes a pair of left and right main frames 3 and 3 that extend from a head pipe 2 disposed on the front side to the left and right of the vehicle body. A vehicle body frame 4, a seat 6 fixed to a seat frame (not shown) extending rearwardly via a bracket 5 provided in the middle of the main frames 3, 3, and the main frames 3, 3 An engine main body 7 mounted on the vehicle, a front fork 9 connected to the head pipe 2 to support the front wheel 8, a rear swing arm 11 connected to the main frames 3 and 3 to support the rear wheel 10, and a main frame. The vehicle body cowling 12 is fixed to the vehicle body 3 so as to cover the engine main body 7 from the front side of the vehicle body, and the fuel tank 13 is disposed in front of the seat 6.

  The main frames 3 and 3 are bent so as to avoid the generator cover 14 disposed on the left side of the vehicle body and the clutch cover 15 disposed on the right side of the vehicle body. Further, a radiator 16 and a reservoir tank 17 constituting an engine cooling system for cooling the engine body 7 are arranged in front of and behind the main body 3 and 3, and an outlet side radiator is provided on the left side of the vehicle body. An inlet side radiator hose 19 is disposed on the right side of the hose 18 and the vehicle body. The radiator hoses 18 and 19 communicate with each other via a water pump 20 and a water jacket formed in a cylinder and a cylinder head of the engine body 7.

  An oil cooler 21 serving as an engine oil cooling system is disposed below the radiator 16, and each end of an inlet-side oil hose 22 and an outlet-side oil hose 23 is provided on the oil cooler 21 on the right side of the vehicle body. It is connected. The other end of the inlet side oil hose 22 is connected to the oil filter 24, and the other end of the outlet side oil hose 23 is connected to a main gallery (not shown) formed in the engine body 7.

  On the other hand, one end of a plurality of exhaust pipes 25 corresponding to the number of cylinder heads is connected to a cylinder head portion (not shown) of the engine body 7. Further, the plurality of exhaust pipes 25, 25... Are connected to exhaust mufflers 28, 28 extending from the exhaust collecting pipe 26 to the rear upper left and right sides of the vehicle body via the exhaust chamber 27, respectively. An oil pan 29 for storing engine oil is disposed as an engine lubrication system on the right side of the vehicle body of the exhaust collecting pipe 26, and a drive pulley 31 of the exhaust control valve 30 (see FIG. 5) is provided on the left side of the exhaust collecting pipe 26 in the vehicle body. Is arranged.

  One end of a cable 32 is connected to the drive pulley 31. The other end of the cable 32 is connected to the main frames 3 and 3 and is supported by one of the engine suspension portions 33 and 33 (the left side of the vehicle body) that substantially supports the engine body 7 via a bracket 34. Connected to the actuator 35. The engine suspension portions 33 and 33 form a substantially triangular space with the main frames 3 and 3, and the actuator 35 is disposed in the triangular space, so that the actuator 35 is connected to the main frame 3. , 3 can be assembled from the outside.

  That is, the actuator 35 is positioned substantially outside the main frames 3 and 3 via the bracket 34 (does not project in the vehicle width direction), and can be easily fixed to the main frame 3 by being fixed to the bracket 34. 3, and the cable 32 is routed through the outside of the main frames 3 and 3 as it is, so that the cable 32 does not straddle the main frames 3 and 3 inside and outside the vehicle body, improving the assembling workability. As a result, the drive pulley (exhaust control valve) 31, the cable 32, and the actuator (drive source) 35 can be attached in a pre-adjusted state.

  Further, the exhaust collecting pipe 26 is arranged to be deviated to the left side of the vehicle body with respect to the center line Q (see FIG. 5) along the longitudinal direction of the vehicle body, and the drive pulley 31 and the actuator 35 are arranged on the deviating side of the exhaust collecting pipe 26. The capacity of the oil pan 29 is secured by arranging the oil pan bulging portion 29a bulging from below the oil pan 29 and the exhaust collecting pipe 26 so as to sandwich the center line Q extending in the longitudinal direction of the vehicle body. However, the cable 32 can be connected to the drive pulley 31 of the exhaust control valve 30 outside the exhaust collecting pipe 26 opposite to the oil pan bulging portion 29a, and the length of the cable 32 can be shortened. Moreover, since the curvature (routing) of the cable 32 can be increased, the sliding resistance of the cable 32 can be reduced.

  At this time, as shown in FIG. 6, a cable bracket 36 for supporting the cable 32 is provided on the exhaust collecting pipe 26 to which the exhaust control valve 30 is assembled, and a rubber cushion is provided on a stopper arm 36a formed integrally with the cable bracket 36. 37, by contacting the inner surface of the vehicle body cowling 12 via 37, it is necessary via the exhaust collecting pipe 26 without arranging a dedicated vehicle body cowling support member on the side where the lower bulging portion 29a of the oil pan 29 does not exist. The vehicle body cowling 12 can be reliably supported on the vehicle body side. The stopper arm 36a extends upward from the outside of the vehicle body so as to at least partially overlap the valve shaft 30a of the exhaust control valve 30 in a side view of the vehicle body.

  By the way, the oil pan 29 is biased to one side (right side) of the vehicle body, and in order to avoid lack of capacity without protruding in the vehicle width direction, the center of the engine body 7 (for example, a plurality of cylinders in a parallel multi-cylinder engine). It is assumed that the width of the oil pan bulging portion 29a is increased by offsetting the center of the crankshaft in the crankshaft direction) to the same side as the exhaust collecting pipe 26 with respect to the center line Q of the vehicle body.

  However, as a result, a certain amount of clearance is formed between the left and right outermost cylinders of the main frames 3 and 3.

  If it is attempted to arrange the actuator 35 of the exhaust control valve 30 using this clearance, the actuator 35 and the oil pan bulging portion 29a are arranged on the same side, and as a result, the actuator 35 and the exhaust collecting pipe 26 are arranged. Are distributed to both sides in the vehicle width direction, and the cable 32 is difficult to route. Further, it becomes necessary to route the cable 32 from one side to the other side in the vehicle width direction through the front space of the cylinder, and not only the assembling workability is impaired, but also the control characteristics of the exhaust control valve 30 due to the extension of the cable 32. Changes, and the reliability as the on-off valve function (opening) is impaired.

  Therefore, in the present embodiment, by assembling the actuator 35 from the outside of the main frame 3, the actuator 35 can be disposed regardless of the above-described clearance, so that the cable 32 can be easily routed (routed). In addition, secular change in the drive characteristics of the exhaust control valve 30 can be suppressed.

  Further, a rubber cushion 37 is abutted to support the vehicle body cowling 12 on the side where the exhaust collecting pipe 26 (or a plurality of exhaust pipes 25, 25...) To which the exhaust control valve 30 is mounted is disposed. Thus, the lower portion of the vehicle body cowling 12 can be easily supported on the side where the exhaust control valve 30 is disposed, and the occurrence of fluttering (backlash) during travel of the vehicle body cowling 12 can be suppressed.

  At this time, the rubber cushion 37 is attached to the stopper arm 36a integral with the cable bracket 36 for supporting the cable 32, so that the back side of the vehicle body cowling 12 can be supported (contacted) at a desired position. . The shape of the stopper arm 36a (for example, O-type, C-type, U-type, etc.) and the shape and material (for example, heat resistance) of the rubber cushion 37 are arbitrary.

  Moreover, even if it is a shaft etc. which replace the cable 32 as a structure which drives the exhaust control valve 30, the same effect can be show | played.

  As described above, in the motorcycle in which the exhaust control valve 30 is disposed in the plurality of exhaust pipes 25, 25... Or the exhaust collecting pipe 26, the actuator 35 as a drive source for driving the exhaust control valve 30 is used as the engine main body 7. By assembling from the outside of the supporting main frames 3 and 3, the exhaust control valve 30 (drive pulley 31), the cable 32, and the actuator 35 can be attached to the engine body 7 in a pre-adjusted state.

  Further, by assembling the actuator 35 from the outside of the main frames 3, 3, it is possible to make it difficult to be affected by the offset position of the engine body 7 with respect to the main frames 3, 3.

  Further, by arranging the actuator 35 on the offset side of the engine body 7 and assembling a plurality of exhaust pipes 25, 25... On the offset side of the engine body 7, effective use of the layout can be realized, and the length of the cable 32 is increased. The length can be shortened.

1 is a left side view of a motorcycle equipped with an exhaust device according to an embodiment of the present invention. 1 is a left side view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention. 1 is a right side view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention. 1 is a perspective view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention. 1 is a cross-sectional view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention. 1 is an enlarged perspective view of a main part of an exhaust device for a motorcycle according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Head pipe 3 ... Main frame 4 ... Body frame 7 ... Engine main body 25 ... Exhaust pipe 26 ... Exhaust collecting pipe 30 ... Exhaust control valve 31 ... Drive pulley 32 ... Cable 35 ... Actuator (drive source)

Claims (4)

A vehicle body frame including at least a head pipe and a pair of left and right main frames, an engine body mounted on the vehicle body frame, a plurality of exhaust pipes attached to the engine body, and an exhaust for collecting the plurality of exhaust pipes A collecting pipe; an exhaust control valve that is assembled to the plurality of exhaust pipes or the exhaust collecting pipe to change a cross-sectional area of the exhaust passage; a drive source that is assembled to the body frame from the outside; and the exhaust control valve; A cable connected to the drive source and transmitting the drive of the drive source to the exhaust control valve ,
The exhaust collecting pipe is arranged to be deviated to one side in the left-right direction of the vehicle body with respect to a center line along the longitudinal direction of the vehicle body, and the drive source is arranged on the deviating side of the exhaust collecting pipe so as to sandwich the center line. An oil pan having an oil pan bulging portion adjacent to the exhaust collecting pipe is formed below the engine body, and the cable is outside the exhaust collecting pipe on the opposite side of the oil pan bulging portion. Connected to the exhaust control valve,
A cable bracket supporting the cable is attached to the exhaust collecting pipe assembled with the exhaust control valve, a stopper arm is formed on the cable bracket, a rubber cushion is attached to a hole formed in the stopper arm, and the stopper An exhaust system for a motorcycle, wherein the arm is in contact with the inner wall surface of the body cowling via the rubber cushion .   The pair of left and right main frames includes an engine suspension for supporting the engine body, and the drive source is formed between the engine suspension and one of the pair of left and right main frames in a side view of the vehicle body. The exhaust device for a motorcycle according to claim 1, wherein the exhaust device is disposed in a region where the motorcycle is located. The cable bracket, according to claim 1 or 2, characterized in that integrally includes a stopper arm that extends outside of the vehicle body upward so as to at least partially overlap in the valve stem of the exhaust control valve in the side view of the vehicle body The exhaust system for a motorcycle according to claim 1. The cables connected to said driving source and said exhaust control valve, any one of the preceding claims, characterized in that is assembled et al on the body frame in a state of being sub-assembly to the exhaust collecting pipe The exhaust device for a motorcycle according to claim 1 .

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