JP2014058179A - Exhaust device of saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ensure the length of an exhaust pipe, and to improve engine performance while keeping a light impression of a vehicle, in an exhaust device of a saddle-riding type vehicle in which a rear cushion unit provided between a vehicle body frame and a swing arm is disposed in a rear part of an engine body and a downstream end of the exhaust pipe connected to a front side wall of the engine body at an upstream end is divided and connected to first and second mufflers.SOLUTION: An exhaust pipe 44 is equipped with a common pipe portion 44a extending from a front side of an engine body EB into between the engine body EB and a rear cushion unit 30 through one side in a vehicle width direction of the engine body EB; and first and second branch pipe portions 44b and 44c branched off from the common pipe portion 44a to be separated in a fore-and-aft direction. The first branch portion 44b passing on the other side in the vehicle width direction is connected to a first muffler 45 disposed in front of the engine body EB, and the second branch portion 44c is connected to a second muffler 46 disposed behind the engine body EB.

Description

  According to the present invention, an engine body is disposed below a main frame in a body frame having a head pipe that supports a front fork that pivotally supports a front wheel and a main frame that extends rearward from the head pipe. A rear wheel is pivotally supported on the rear part of a swing arm that is mounted on the body frame or the engine body so as to be swingable up and down, and a rear cushion unit provided between the body frame and the swing arm is vertically A saddle-ride type vehicle that extends and is arranged behind the engine main body, and that has a downstream end of an exhaust pipe whose upstream end is connected to a front side wall of the engine main body divided into first and second silencers. The present invention relates to an exhaust device.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses an exhaust device for a motorcycle in which a downstream end of an exhaust pipe is divided and connected to silencers disposed on the left and right sides of a rear wheel.

JP-A-2005-313671

  However, in the one disclosed in Patent Document 1, the silencer is distributed to the left and right of the rear wheel so that the mass is concentrated on the vehicle body center side in the vehicle width direction to obtain a light feeling. The left and right silencers are at a relatively high position in order to suppress the increase in the vehicle width while avoiding interference with the rear wheels, so if the size of the silencer is increased to reduce exhaust noise, the rear side of the vehicle body The upper silencer becomes larger and heavier, and the lightness and stability obtained by the mass concentration and the low center of gravity arrangement are diminished.

  The present invention has been made in view of such circumstances, and provides a saddle-ride type vehicle capable of enhancing the engine performance by sufficiently securing the length of the exhaust pipe while maintaining the lightness of the vehicle. For the purpose.

  In order to achieve the above object, the present invention provides a vehicle body frame having a head pipe that supports a front fork that pivotally supports a front wheel and a main frame that extends rearward from the head pipe. A rear wheel is pivotally supported at a rear portion of a swing arm that is mounted so as to be disposed below the swing frame and is supported by the vehicle body frame or the engine body so as to be swingable up and down, and is provided between the vehicle body frame and the swing arm. A rear cushion unit extending in the vertical direction and disposed behind the engine body, and a downstream end of an exhaust pipe having an upstream end connected to a front side wall of the engine body is divided into first and second silencers. In the exhaust device of the saddle-ride type vehicle to be connected, the exhaust pipe is connected to the engine main body from the front of the engine body. A common pipe portion extending between the engine main body and the rear cushion unit via one side in the vehicle width direction, and first and second branch pipe portions branched from the common pipe portion and separated into the front and the rear. A first branch pipe portion passing through the other side in the vehicle width direction is connected to a first silencer disposed in front of the engine body, and a second branch pipe portion is disposed behind the rear cushion unit. The first feature is that it is connected to a vessel.

  According to the present invention, in addition to the configuration of the first feature, the vehicle body frame extends rearward and downward from the head pipe at a steeper angle than the main frame, and is disposed in front of the engine body, A pair of left and right lower frames that are connected to the lower end portion of the down frame and extend rearward, and in a side view from the vehicle width direction, have a triangular shape that widens downward toward the bottom, and in front view, A second feature is that a first silencer having a polygonal shape having a width corresponding to a width of a crankcase constituting a part is disposed between the lower frame and the front wheel in front thereof. .

  In the present invention, in addition to the configuration of the first or second feature, the first silencer includes a cylindrical first case closed at both ends in the vehicle width direction, and an end of the first case on the other side in the vehicle width direction. A first inner pipe that is continuous with the first branch pipe connected to the section and traverses the inside of the first case along the vehicle width direction. A third feature is that a first exhaust outlet that communicates with the inner pipe is provided, and the first inner pipe is inclined downward toward the first exhaust outlet.

  In the present invention, in addition to any of the configurations of the first to third features, the second silencer is long in the vehicle width direction, and has a box shape that is high in the rear and long in the front-rear direction in a side view in the vehicle width direction A fourth feature is to have a shaped second case and to be disposed below the air cleaner.

  In the present invention, in addition to the configuration of the fourth feature, the second silencer is connected to the second case and the second branch pipe portion connected to the front portion of the second case on the other side in the vehicle width direction. A second exhaust pipe communicating with the second inner pipe is provided at a rear portion of the second case on one side in the vehicle width direction. The fifth feature is that the second inner pipe is inclined toward the rear in a plan view toward the second exhaust outlet side and is inclined upward in a side view.

  Further, in the present invention, in addition to any of the configurations of the first to fifth features, the exhaust pipe is joined to three pipe members that respectively constitute the common pipe portion, the first and second branch pipe portions. The sixth feature is that

  According to the first feature of the present invention, the exhaust pipe extends from the front of the engine main body to the engine main body and the rear cushion unit through one side in the vehicle width direction of the engine main body. Since it branches back and forth so as to be connected to the second silencer behind the compressor and the rear cushion unit, the length of the exhaust pipe from the engine body to the first and second silencers can be secured sufficiently long. In addition, the first and second silencers are arranged in front and rear of the engine main body so that the front and rear weight balance is good, which can contribute to the improvement in the lightness of the vehicle due to the concentration of mass.

  Further, according to the second feature of the present invention, the first silencer that is a polygonal shape having a triangular shape that extends downward in a side view and a width corresponding to the width of the crankcase in a front view, Since it is arranged between the pair of left and right lower frames of the body frame and the front wheels in front of it, the upper part of the first silencer is prevented from becoming large in the front-rear direction of the vehicle and avoids interference with the front wheels In addition, the first silencer can be effectively disposed between the lower frame and the front wheel while covering the crankcase from the front, and the noise reduction effect is improved by increasing the volume of the first silencer, and mass concentration is achieved. In addition, the vehicle can be reduced in size.

  According to the third feature of the present invention, the first branch pipe part is connected to the end of the first case on the side where the first branch pipe part is arranged in the vehicle width direction, and continues to the first branch pipe part. A first exhaust outlet communicating with the first inner pipe traversing the first case in the vehicle width direction is provided in the first case on the opposite side of the first branch pipe portion in the vehicle width direction, and the first inner pipe is Since it is inclined downward toward the first exhaust outlet side, the bending of the connecting portion of the first branch pipe portion to the first silencer is reduced while the first silencer is disposed at a position covering the crankcase from the front. In addition, by disposing the first exhaust outlet at a low position, it is possible to suppress the transmission of the exhaust sound to the driver while improving the performance of the engine.

  According to the fourth feature of the present invention, the second silencer has a box shape that is long in the vehicle width direction and has a rear side that is long in the vehicle width direction and long in the front-rear direction. Since it arrange | positions below, the volume of a 2nd silencer can be earned, ensuring the volume of an air cleaner.

  According to the fifth feature of the present invention, the second branch pipe part is connected to the front part of the second case on the side where the second branch pipe part is arranged in the vehicle width direction, and continues to the second branch pipe part. A second exhaust outlet communicating with a second inner pipe traversing the second case along the vehicle width direction is provided at the rear of the second case on the opposite side of the second branch pipe portion in the vehicle width direction. Since the pipe is inclined rearward and upward toward the second exhaust outlet side, bending of the connection portion of the second branch pipe portion to the second silencer is reduced and the second exhaust outlet is disposed at a high position. The noise reduction performance can be improved while improving the engine performance, and the second exhaust outlet is disposed on the same side as the first exhaust outlet of the first silencer in the vehicle width direction. Suppresses the transmission of exhaust sound to the driver by resonance of exhaust sound from the first and second silencers It can be.

  Further, according to the sixth aspect of the present invention, since the exhaust pipe is configured by joining the three pipe members, the first and second silencers are distributed before and after the engine body. As a result, the number of divisions of the exhaust pipe can be reduced to improve the assemblability.

1 is a left side view of a motorcycle according to a first embodiment. It is the top view which looked at the engine main part, the rear cushion unit, and the exhaust device from the upper part. FIG. 3 is a partially cutaway front view of the first silencer viewed from the direction of arrow 3 in FIG. 2. Fig. 6 is a left side view of a motorcycle according to a second embodiment. It is the top view which looked at the engine main part, the rear cushion unit, and the exhaust device from the upper part.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, left and right, and top and bottom refer to directions viewed from a passenger who rides a saddle-ride type vehicle.

  The first embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, in FIG. 1, this saddle-ride type vehicle is a motorcycle for motocross competition, and its body frame F is a front wheel. A head pipe 13 that supports the front fork 11 and the bar-shaped steering handle 12 that support the WF so as to be steerable, a pair of left and right main frames 14 that extend rearwardly downward from the head pipe 13, and their main frames A down frame 15 that extends rearward and downward from the head pipe 13 at a steeper angle than 14, a pair of left and right lower frames 16 that are connected to the lower end portion of the down frame 15 and extend rearward, and the main frame 14. A pair of left and right sides having upper ends joined to the rear ends and extending downward and the rear ends of the lower frames 16 are connected to the lower ends. The upper cross member 18 provided between the rear portions of the bot plates 17 and the pair of left and right main frames 14, the lower cross member 19 provided between the lower ends of the pivot plates 17 and the upper cross member 18. A pair of left and right seat rails 20 that extend rearward with their front ends connected to each other, and a pair of left and right rear frames 21 that connect the middle of the vertical direction of both pivot plates 17 and the rear part of both seat rails 20. And a substantially U-shaped reinforcing frame 22 connecting the lower part of the down frame 15 and the main frames 14.

  An engine body EB of an engine E that is a single cylinder is mounted on the vehicle body frame F so as to be disposed below the main frame 14. The front portion of the engine body EB is a first part. It is supported by the down frame 15 via an engine hanger 23, the lower part of the engine body EB is supported by second engine hangers 24 provided on the lower frame 16 ..., and the upper part of the engine body EB is It is supported on the upper part of the pivot plate 17 through third engine hangers 25.

  The axle 33 of the rear wheel WR is pivotally supported on the rear end portion of the swing arm 26 extending in the front-rear direction with the rear wheel WR sandwiched from both sides, and the front end portion of the swing arm 26 is connected to the engine body EB or the vehicle body frame F. In this embodiment, the front end portion of the swing arm 26 can swing up and down via a support shaft 27 below the pivot plate 17 in the vehicle body frame F. It is supported by.

  A link mechanism 28 is provided between the lower cross member 19 and the swing arm 26 of the vehicle body frame F, and between the link member 28a constituting a part of the link mechanism 28 and the vehicle body frame F, A rear cushion unit 30 is provided which is disposed between a pair of left and right pivot plates 27 disposed behind the engine body EB and extends vertically. That is, the lower end portion of the rear cushion unit 30 disposed at the rear of the engine body EB so that the upper end portion is connected to the upper cross member 18 of the vehicle body frame F is interposed via the link member 29 of the link mechanism 28. To the swing arm 26.

  A transmission (not shown) is accommodated in a crankcase 31 that constitutes a part of the engine body EB. An output shaft 32 of the transmission protrudes leftward from the crankcase 31, and an output shaft 32 thereof. An endless chain 36 is wound around a drive sprocket 34 provided on the rear wheel and a driven sprocket 35 provided on the axle 33 of the rear wheel WR.

  Further, a fuel tank 37 is provided above the engine body EB and on both main frames 14. A passenger seat 38 is disposed behind the fuel tank 37 so as to be supported by the seat rails 20. The

  The rotation of the front wheel WF can be braked by a front wheel disc brake BF, and the rotation of the rear wheel WR can be braked by a rear wheel disc brake BR.

  An intake device 41 is connected to the rear side wall of the cylinder head 39 constituting a part of the engine main body EB, and an air cleaner 42 at the upstream end of the intake device 41 is disposed obliquely above and behind the engine main body EB.

  An exhaust device 43 is connected to the front side wall of the cylinder head 39 in the engine main body EB. The exhaust device 43 has an exhaust pipe 44 whose upstream end is connected to the front side wall of the cylinder head 39. Is connected to a first silencer 45 disposed in front of the engine body EB and a second silencer 46 disposed in the rear of the rear cushion unit 30.

  Referring also to FIG. 2, the exhaust pipe 44 is connected to the engine body EB and the rear cushion from the front of the engine body EB through one side in the vehicle width direction of the engine body EB (left side in this embodiment). A common pipe portion 44a extending between the units 30; and first and second branch pipe portions 44b and 44c branched from the common pipe portion 44a and separated in the front-rear direction. In this embodiment, the first branch pipe portion 44b passing through the right side) is connected to the first silencer 45 arranged in front of the engine body EB, and the second branch pipe portion 44c is arranged behind the rear cushion unit 30. Connected to the second silencer 46.

  Moreover, the exhaust pipe 44 is formed by joining three pipe members 47, 48, and 49 that constitute the common pipe portion 44a and the first and second branch pipe portions 44b and 44c, respectively, and the common pipe portion 44a. The pipe member 47 constituting the cylinder body 39 is bent so as to pass between the engine main body EB and the rear cushion unit 30 from the front side wall of the cylinder head 39 through the left side of the engine main body EB. A Y-shaped joint 50 is fixed to the end. Further, the pipe member 48 constituting the first branch pipe portion 44b has an upstream end inserted and joined to the joint 50, and is bent so as to extend forward on the right side of the engine body EB. The pipe member 49 constituting the branch pipe part 44c is inserted and joined to the joint 50 at the upstream end, and is bent so as to extend rearward on the right side in the vehicle width direction.

  Referring also to FIG. 3, the first silencer 45 includes a cylindrical first case 51 whose both ends along the vehicle width direction are closed, and an end of the first case 51 on the other side in the vehicle width direction (this A first inner pipe 52 extending along the vehicle width direction in the first case 51 and connected to the first branch pipe portion 44b connected to the right branch portion in the embodiment), and a side surface from the vehicle width direction. The left and right sides of the body frame F are formed in a polygonal shape having a width corresponding to the width of the crankcase 31 constituting a part of the engine body EB in the front view. It arrange | positions between a pair of lower frame 16 ... and the front wheel WF ahead of it, and is supported by the lower frame 16 ....

  A plurality of through holes 53 are provided on the side wall of the first inner pipe 52, and the first inner pipe 52 is coaxial with a cylindrical net member 54 at a portion where the through holes 53 are provided. The first case 51 is filled with glass wool 55.

  A first tail pipe 56 connected to the first inner pipe 52 is connected to the first inner pipe 52 at a rear lower portion of the first case 51 on one side in the vehicle width direction (the left end side in this embodiment). The first inner pipe 52 is connected to the first case 51 so as to extend slightly backward while forming the first exhaust outlet 57 that opens rearward. It inclines below toward the direction.

  The second silencer 46 is a box-shaped second case 59 that is long in the vehicle width direction and is high in the rear and long in the front-rear direction when viewed from the side in the vehicle width direction, In this embodiment, the second inner pipe 60 that crosses the second case 59 along the vehicle width direction is connected to the second branch pipe portion 44c connected to the front portion on the right side), and Arranged below the air cleaner 42.

  The second silencer 46 is configured in the same manner as the first silencer 45, and a plurality of through holes are provided in the side wall of the second inner pipe 60 in the same manner as the first inner pipe 52 of the first silencer 45. (Not shown) is provided, and the second inner pipe 60 is coaxially surrounded by a cylindrical mesh member (not shown) at a portion where the through holes are provided, and glass wool (see FIG. (Not shown) is filled.

  A second tail pipe 61 connected to the second inner pipe 60 is connected to the second inner pipe 60 on the rear side of the second case 59 in the vehicle width direction (the left end side in this embodiment). The second inner pipe 60 is connected to the second exhaust outlet 62 in the second case 59 so as to extend slightly rearward while forming a second exhaust outlet 62 that opens rearward. On the other hand, it is inclined to the rear as shown in FIG. 2 in a plan view and is inclined to the upper side as shown in FIG. 1 in a side view.

  Next, the operation of the first embodiment will be described. The exhaust pipe 44 passes from the front of the engine body EB to the engine body EB through one side in the vehicle width direction of the engine body EB (left side in this embodiment). A common pipe portion 44a extending between the rear cushion units 30, and first and second branch pipe portions 44b and 44c branched from the common pipe portion 44a and separated into the front and rear, and the other side in the vehicle width direction of the engine body EB A first branch pipe portion 44b passing through (right side in this embodiment) is connected to a first silencer 45 disposed in front of the engine body EB, and a second branch pipe portion 44c is located behind the rear cushion unit 30. The exhaust pipe 44 from the engine body EB to the first and second silencers 45, 46 can be secured sufficiently long. In addition, the first and second silencers 45 and 46 are arranged separately before and after the engine main body EB so that the weight balance between the front and the rear is good, and it is possible to contribute to the improvement of the lightness of the vehicle due to the concentration of mass. .

  A first silencer 45 having a polygonal shape with a width corresponding to the width of the crankcase 31 in a front view and a triangular shape that extends downward in a side view from the vehicle width direction is seen from the main frame 14. And a pair of left and right lower frames 16 extending rearwardly from the head pipe 13 at a steep angle and connected to the lower end portion of the down frame 15 disposed in front of the engine main body EB, and the front of the lower frame 16. Since it is arranged between the front wheels WF, the upper part of the first silencer 45 is prevented from becoming large in the front-rear direction of the vehicle to avoid interference with the front wheels WF and to cover the crankcase 31 from the front. However, the first silencer 45 can be effectively disposed between the lower frame 16 and the front wheel WF, and the effect of the silencing effect due to the increase in the volume of the first silencer 45 can be improved. Strive to, it is possible to reduce the size of the concentration and motorcycle mass.

  The first silencer 45 is connected to a cylindrical first case 51 whose both ends in the vehicle width direction are closed, and an end of the first case 51 on the other side in the vehicle width direction (right side in this embodiment). A first inner pipe 52 that is connected to the first branch pipe portion 44b and traverses the first case 51 in the vehicle width direction, and is first on one side in the vehicle width direction (left side in this embodiment). The case 51 is provided with a first exhaust outlet 57 that communicates with the first inner pipe 52, and the first inner pipe 52 is inclined downward toward the first exhaust outlet 57 side. By disposing the first silencer 45 at a position that covers from the engine, the bending of the connection portion of the first branch pipe portion 44b to the first silencer 45 is reduced, and the first exhaust outlet 57 is disposed at a low position. While improving the performance of E, to the driver It is possible to suppress the transmission of aspirated.

  The second silencer 46 has a box-shaped second case 59 that is long in the vehicle width direction and is high in the rear in the vehicle width direction and long in the front-rear direction, and is disposed below the air cleaner 42. Therefore, the volume of the second silencer 46 can be earned while securing the volume of the air cleaner 42.

  The second silencer 46 is connected to the second case 59 and the second branch pipe portion 44c connected to the front of the second case 59 on the other side in the vehicle width direction (right side in this embodiment). A second inner pipe 60 that traverses the inside of the two cases 59 along the vehicle width direction, and a second inner pipe 60 is disposed on the rear side of the second case 59 on one side in the vehicle width direction (left side in this embodiment). A second exhaust outlet 62 communicating with the pipe 60 is provided, and the second inner pipe 60 is inclined toward the rear in the plan view in the second exhaust outlet 62 side and upward in the side view. Further, it is possible to reduce the bending of the connection portion of the second branch pipe portion 44c to the second silencer 46 and to arrange the second exhaust outlet 62 at a high position, and to improve the silencing performance while improving the engine performance. And the first To the driver by resonance of exhaust sound from the first and second silencers 45 and 46, although the second exhaust outlet 62 is disposed on the same side as the first exhaust outlet 57 of the sounder 45 in the vehicle width direction. The transmission of exhaust noise can be suppressed.

  Further, since the exhaust pipe 44 is formed by joining three pipe members 47, 48, 49 constituting the common pipe portion 44a and the first and second branch pipe portions 44b, 44c, respectively, the first and second Although the silencers 45 and 46 are distributed before and after the engine main body EB, the number of divisions of the exhaust pipe 44 can be suppressed to be small and the assemblability can be improved.

  A second embodiment of the present invention will be described with reference to FIG. 3 and FIG. 4, but the parts corresponding to the first embodiment are only given the same reference numerals and are shown in detail. Description is omitted.

  An exhaust device 63 is connected to the front side wall of the cylinder head 39 in the engine main body EB. The exhaust device 63 is connected to the front side wall of the cylinder head 39 with an upstream end connected to the exhaust pipe 64. The downstream end is connected to a first silencer 45 disposed in front of the engine body EB and a second silencer 66 disposed behind the rear cushion unit 30 and on the right side of the rear wheel WR.

  The exhaust pipe 64 is a common pipe portion 64a extending from the front of the engine main body EB to the space between the engine main body EB and the rear cushion unit 30 via one side in the vehicle width direction of the engine main body EB (left side in this embodiment). And first and second branch pipe portions 64b and 64c that branch from the common pipe portion 64a and divide into the front and rear, and pass through the other side in the vehicle width direction of the engine body EB (right side in this embodiment). A branch pipe portion 64b is connected to a first silencer 45 disposed in front of the engine body EB, and a second branch pipe portion 64c is disposed behind the rear cushion unit 30 and on the right side of the rear wheel WR. Connected to the silencer 66.

  Moreover, the exhaust pipe 64 is formed by joining three pipe members 67, 68, and 69 that constitute the common pipe portion 64a and the first and second branch pipe portions 64b and 64c, respectively, and the common pipe portion 64a. The pipe member 67 constituting the cylinder head 39 is bent so as to wrap around the engine main body EB and the rear cushion unit 30 from the front side wall of the cylinder head 39 through the left side of the engine main body EB. A Y-shaped joint 70 is fixed to the end. The pipe member 68 constituting the first branch pipe portion 64b is inserted and joined to the joint 70 at the upstream end, and is bent so as to extend forward on the right side of the engine body EB. The pipe member 69 constituting the branch pipe portion 64c is inserted and joined to the joint 70 at the upstream end, and is bent so as to extend rearward on the right side in the vehicle width direction.

  The second silencer 66 is configured to extend long in the front-rear direction on the right side of the rear wheel WR.

  Also in the second embodiment, as in the first embodiment, the length of the exhaust pipe 64 from the engine body EB to the first and second silencers 45 and 66 can be secured sufficiently long. In addition, the first and second silencers 45 and 66 are arranged separately before and after the engine main body EB, so that the front and rear weight balance is good, and it is possible to contribute to the improvement of the lightness of the vehicle due to the concentration of mass. In addition, the number of divisions of the exhaust pipe 64 can be reduced to improve the assemblability.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the case where the swing arm 26 is rotatably supported on the pivot plate 17 of the vehicle body frame F has been described. However, in the saddle-ride type vehicle in which the swing arm is rotatably supported on the engine body. The present invention is also applicable.

DESCRIPTION OF SYMBOLS 11 ... Front fork 13 ... Head pipe 14 ... Main frame 15 ... Down frame 16 ... Lower frame 26 ... Swing arm 30 ... Rear cushion unit 43, 63 ... Exhaust Apparatus 44,64 ... exhaust pipe 44a, 64a ... common pipe part 44b, 64b ... 1st branch pipe part 44c, 64c ... 2nd branch pipe part 45 ... 1st silencer 46, 66 ... second silencer 47, 48, 49, 67, 68, 69 ... pipe member 51 ... first case 52 ... first inner pipe 57 ... first exhaust outlet 59 ... Second case 60 ... second inner pipe 62 ... second exhaust outlet EB ... engine body F ... body frame WF ... front wheel WR ... rear wheel

Claims (6)

  A vehicle body frame (F) having a head pipe (13) that supports the front fork (11) pivotally supporting the front wheel (WF) and a main frame (14) extending rearward from the head pipe (13). A swing arm (26) is mounted so that an engine body (EB) is disposed below the main frame (14) and is supported on the body frame (F) or the engine body (EB) so as to be swingable up and down. ) Is supported by a rear wheel (WR), and a rear cushion unit (30) provided between the vehicle body frame (F) and the swing arm (26) extends in the vertical direction to extend the engine body (EB). The downstream ends of the exhaust pipes (44, 64), which are arranged rearward and whose upstream ends are connected to the front side wall of the engine body (EB), have first and second noise reductions. (45, 46; 45, 66) In the exhaust system of a saddle-ride type vehicle connected separately, the exhaust pipes (44, 64) are connected to the engine body (EB) from the front of the engine body (EB). A common pipe portion (44a, 64a) extending between the engine main body (EB) and the rear cushion unit (30) through one side in the vehicle width direction, and branched from the common pipe portion (44a, 64a) to be separated into front and rear. First and second branch pipe portions (44b, 44c; 64b, 64c), and the first branch pipe portions (44b, 64b) passing through the other side of the engine body (EB) in the vehicle width direction are the engine body ( EB) is connected to the first silencer (45), and the second branch pipe portions (44c, 64c) are arranged behind the rear cushion unit (30). 66) Exhaust system for a saddle type vehicle, characterized in that it is continued.   The vehicle body frame (F) extends rearward and downward from the head pipe (13) at a steeper angle than the main frame (14) and is disposed in front of the engine body (EB), The lower frame (15) includes a pair of left and right lower frames (16) connected to the lower end of the down frame (15) and extending rearward, and has a triangular shape that widens downward toward the bottom when viewed from the side in the vehicle width direction. In view, the first silencer (45) having a polygonal shape corresponding to the width of the crankcase (31) constituting a part of the engine body (EB) includes the lower frame (16) and the front thereof. The exhaust device for a saddle-ride type vehicle according to claim 1, wherein the exhaust device is disposed between the front wheel (WF) and the front wheel (WF).   The first silencer (45) includes a cylindrical first case (51) whose both ends in the vehicle width direction are closed, and a first branch connected to the other end of the first case (51) in the vehicle width direction. A first inner pipe (52) connected to the pipe portions (44b, 64b) and traversing the first case (51) along the vehicle width direction; 51) is provided with a first exhaust outlet (57) communicating with the first inner pipe (52), and the first inner pipe (52) is disposed so as to be inclined downward toward the first exhaust outlet (57) side. The exhaust device for a saddle-ride type vehicle according to claim 1 or 2, wherein   The second silencer (46) has a box-shaped second case (59) that is long in the vehicle width direction and is high in the rear and long in the front-rear direction in a side view in the vehicle width direction. The exhaust device for a saddle-ride type vehicle according to any one of claims 1 to 3, wherein the exhaust device is disposed below the vehicle.   The second silencer (46) is connected to the second case (59) and the second branch pipe portion (44c) connected to the front portion of the second case (59) on the other side in the vehicle width direction. A second inner pipe (60) traversing the inside of the case (59) along the vehicle width direction, and a second inner pipe (60) on the rear side of the second case (59) on one side in the vehicle width direction. ) Leading to the second exhaust outlet (62), the second inner pipe (60) is inclined rearward in plan view and upward in side view. The exhaust device for a saddle-ride type vehicle according to claim 4, wherein the exhaust device is inclined.   The exhaust pipe (44, 64) has three pipe members (47, 48, 64c, 64c) that constitute the common pipe part (44a, 64a) and the first and second branch pipe parts (44b, 64b; 44c, 64c), respectively. 49; 67, 68, 69) are joined to each other, and the exhaust device for a saddle-ride type vehicle according to any one of claims 1 to 5.

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