JP5908323B2 - Saddle riding - Google Patents

Description

  The present invention relates to a saddle-ride type vehicle such as a motorcycle or a wasteland traveling vehicle.

  Patent Documents 1 and 2 disclose a structure in which a supercharger is disposed adjacent to a crankcase front portion of an internal combustion engine in a vehicle equipped with the internal combustion engine.

  In the automobile having a wide vehicle body described in Patent Document 1, the intercooler that cools the supercharged intake air that has been compressed and heated by the supercharger is disposed in front of the internal combustion engine that is well hit by the traveling wind. The supercharged intake air whose temperature has been raised is efficiently cooled.

However, in the motorcycle with a narrow vehicle body width described in Patent Document 2, a radiator with a wide front view for cooling the internal combustion engine is disposed in front of the cylinder head above the internal combustion engine, and the exhaust pipe is further forward of the vehicle body. Since it protrudes and the supercharger is disposed below it, the intercooler is disposed on one side of the cylinder head, and the sub-radiator is disposed on the other side so as to face the vehicle width direction. Therefore, the structure of Patent Document 2 tends to require an air guide structure for cooling the sub-radiator. Further, the length of the cooling water pipe connecting the intercooler and the sub-radiator is increased, and the load of the cooling water pump for cooling water circulation is increased.
Even in a saddle-ride type vehicle, if an intercooler is arranged in front of the internal combustion engine as in Patent Document 1, traveling wind can be efficiently applied to the intercooler.
However, in the case of saddle-ride type vehicles, the wheelbase is shorter than that of a four-wheeled vehicle, so if an intercooler is placed in front of the internal combustion engine, the front wheels will approach the intercooler if the front fork is shortened, avoiding this Therefore, it is necessary to change the vehicle body dimensions such as the wheel base length or the swing arm length, or the vehicle body member dimensions, which may affect the vehicle characteristics of the finished vehicle.

Japanese Unexamined Patent Publication No. 63-093623 JP-A-2-016327

  The present invention is for overcoming the drawbacks of the above-mentioned patent document. The purpose of the present invention is to efficiently guide the traveling wind to the intercooler without changing the size and shape of the finished vehicle, and to provide a supercharged intake passage. An object of the present invention is to provide a saddle-ride type vehicle that can sufficiently reduce the supercharged intake air temperature while shortening and has high fuel efficiency.

In order to solve the above problems, the invention described in claim 1
Body frame (1),
A front fork (8) pivotally supported by the head pipe (2) at the front of the vehicle body frame (1) so as to be pivotable to the left and right, and pivotally supporting the front wheel (10) at the bottom;
An internal combustion engine (20) supported by the body frame (1);
A supercharger (30) is disposed in front of the crankcase (21) of the internal combustion engine (20), and an intercooler (37) that cools the supercharged intake air that has been compressed and heated by the supercharger (30), A surge tank (35) connected to the downstream side of the supercharged intake of the supercharger (30) and receiving the supercharged intake air cooled by the intercooler (37) is connected to the intake port (27) of the internal combustion engine (20). In a saddle-ride type vehicle (0) having a supercharging system configured to be connected,
All the cylinders of the internal combustion engine (20) are inclined toward the rear of the vehicle, and the intake port (27) is disposed on the front side of the cylinder head (23) ,
The surge tank (35) is disposed in front of the cylinder;
The saddle-ride type vehicle characterized in that the intercooler (37) is disposed between the front wheel (10) and the internal combustion engine.

  According to a second aspect of the present invention, the supercharger has a down tube inclined obliquely downward and rearward from the head pipe (2), and the supercharger (V) is formed in a substantially V-shaped space defined by the cylinder and the down tube. 30. The saddle riding type vehicle according to claim 1, wherein the surge tank (35) and the surge tank (35) are arranged.

  The invention according to claim 3 is characterized in that an air cleaner (36) connected upstream of the supercharger (30) is disposed above the surge tank (35). It is a saddle-ride type vehicle described.

  According to a fourth aspect of the present invention, the compressor shaft (30b) of the supercharger (30) is disposed in parallel with the vehicle width direction, the supercharged intake outlet of the supercharger (30) is directed forward of the vehicle, The saddle-ride type vehicle according to claim 3, wherein the intercooler (37) is disposed in front of the supercharger (30).

  According to a fifth aspect of the present invention, the purification intake passage downstream of the air cleaner (36) is disposed so as to pass to the side of the surge tank (35), and is connected to an axial end of the supercharger (30). The saddle-ride type vehicle according to claim 4, wherein

  In the invention according to claim 6, the intercooler (37) includes an upstream tank (37a) into which upstream supercharging intake air flows, and a plurality of cooling tubes (37c) connected to the upstream tank (37a). And a downstream tank (37b) connected to the cooling tube (37c), and the connection portion on the connection portion side of the purification intake passage and the supercharger (30) of the downstream tank (37b). 6. The saddle riding type vehicle according to claim 5, wherein a bypass passage communicating with the vehicle is provided.

  According to a seventh aspect of the present invention, the internal combustion engine (20) is a water-cooled type and has a cooling radiator (38), and the cooling radiator (38) is disposed immediately after the front wheel (10). The saddle-ride type vehicle according to any one of claims 3 to 6, wherein the cooling radiator (38) is disposed on an upper side and the intercooler (37) is disposed on a lower side thereof.

  According to an eighth aspect of the present invention, there is provided a drive pulley (31) connected to a crankshaft (25) of the internal combustion engine (20) and an input shaft of the supercharger (30) adjacent to the crankshaft (25). The saddle-ride type vehicle according to any one of claims 1 to 7, wherein an endless belt (33) is stretched over a connected driven pulley (32).

According to the first aspect of the present invention, all the cylinders of the internal combustion engine are inclined toward the rear of the vehicle, the intake port is disposed on the vehicle front side of the cylinder head, a supercharger is disposed in front of the rearwardly inclined cylinder, and the rear By arranging a surge tank in the open space in front of the inclined cylinder and arranging an intercooler between the front wheels and the internal combustion engine, the supercharging system parts can be compactly arranged in one place and the supercharging intake passage Therefore, the supercharged intake air can be supplied to the internal combustion engine without delay in response to the operating state of the internal combustion engine. Furthermore, the cooling efficiency of the supercharged intake air can be remarkably increased by applying the traveling wind over the entire surface of the intercooler.

  According to a second aspect of the present invention, the supercharger and the surge tank are disposed in a substantially V-shaped space composed of a down tube inclined rearward and rearwardly and the rearwardly inclined cylinder, thereby providing the supercharger. And the surge tank can be stored compactly.

  According to a third aspect of the present invention, the surge tank and the air cleaner are rationally arranged in an upper space of the internal combustion engine which is enlarged by the rearwardly inclined cylinder, thereby further reliably reducing the supercharging system component. Can be arranged.

  According to a fourth aspect of the present invention, the supercharged intake passage is connected to the intercooler by directing a supercharged outlet of the supercharged intake passage that guides the supercharged intake from the supercharger to the intercooler. It can be shortened to the shortest, an increase in the weight of the supercharging system can be suppressed, and the supercharging system components can be collected in a compact manner.

  In the invention according to claim 5, as a result of the intake air passing through the purified intake passage being substantially at atmospheric pressure, it is sufficient that the wall thickness of the purified intake passage component constituting the purified air passage is thin, compared with the supercharged intake passage. Even if the purified air passage is longer than the supercharging passage, there is little possibility of causing an increase in weight. Further, by utilizing this characteristic of the purified air passage part, the capacity of the supercharged system part can be easily secured by bringing the purified intake passage closer to the side of the supercharged system part. The passage and the supercharging passage can be gathered in a compact manner.

  In the sixth aspect of the present invention, after the excess supercharged air is cooled by the intercooler, it can be returned to the supercharger, and the temperature rise of the supercharger can be suppressed.

  In the invention of claim 7, the radiator and the intercooler are arranged immediately after the front wheel in a state where the radiator requiring cooling is located above and the intercooler is located below. The supercharger can be shortened by placing a supercharger on the lower side of the internal combustion engine that obtains driving force from the crankcase side of the internal combustion engine, and the load on the supercharger can be reduced. In addition to the improvement, the supercharged air can be supplied to the internal combustion engine without delay in response to the operating state of the internal combustion engine.

  According to an eighth aspect of the present invention, an endless belt is bridged between a drive pulley connected to the crankshaft of the internal combustion engine and a driven pulley connected to the input shaft of the supercharger adjacent to the crankshaft. Since the power transmission path of the supercharger drive system can be shortened and the supercharger drive system can be simply configured, the vehicle weight can be reduced and the cost can be reduced.

1 is a schematic left side view of a saddle-ride type vehicle according to an embodiment of the present invention. It is a principal part expanded left view of FIG. It is the left view which expanded the principal part of FIG. FIG. 3 is a front view illustrating a vertical positional relationship between an internal combustion engine mounted on the saddle-ride type vehicle illustrated in FIG. 2 and an auxiliary machine of the internal combustion engine. FIG. 5 is a front view illustrating a state where the intercooler and the radiator are removed in FIG. 4. It is a principal part schematic left view of the saddle-ride type vehicle which concerns on other embodiment of this invention. FIG. 7 is a front view illustrating a state in which an intercooler and a radiator are removed in a front view illustrating a vertical positional relationship between an internal combustion engine mounted on the saddle-ride type vehicle illustrated in FIG. 6 and an auxiliary machine of the internal combustion engine.

  Hereinafter, an embodiment illustrated in FIGS. 1 to 5 will be described for the saddle riding type vehicle according to the present invention.

In this embodiment, the four-cycle internal combustion engine mounted on the saddle-ride type vehicle is an in- line two-cylinder water-cooled DOHC gasoline engine that is inclined rearward of the vehicle body. Alternatively, it may be a two-cycle gasoline engine or a diesel engine.

  First, a vehicle body 1 of a motorcycle 0 to which the present embodiment is applied includes a head pipe 2, a main frame 3 in which a front end portion 3a is integrally coupled to an upper portion of the head pipe 2, and a central portion 3b is curved downward. A pivot plate 4 integrally coupled to the lower end portion 3c of the main frame 3, a pair of left and right seat rails 5 coupled to the central portion 3b of the main frame 3 and extending rearward, and an upper end of the front portion 6a Is connected to the head pipe 2 so as to be directed downward obliquely, the rear part 6d extends rearward and the rear end part 6e is integrally connected to the pivot plate 4, the pivot plate 4 and the seat rail. The upper and lower ends 7a and 7b are integrally connected to the sub pipe 7 extending obliquely upward and obliquely upward.

  Further, a front fork 8 is pivotally supported on the head pipe 2 of the vehicle body 1 so as to be turnable to the left and right. A front wheel 10 is rotatably attached to a lower end portion 8 a of the front fork 8 and can swing up and down on the pivot plate 4. A front end 9 a of the rear fork 9 is attached to the rear fork 9, and a rear wheel 11 is rotatably attached to the rear end of the rear fork 9 via a rear axle 12.

  In an internal combustion engine 20, which is an in-line two-cylinder four-cycle DOHC gasoline engine with cylinder holes (not shown) mounted in the motorcycle 0 arranged in the vehicle width direction, a cylinder block 22, a cylinder head 23, and a head cover 24 are disposed on a crankcase 21. Are stacked one after the other in a state inclined to the rear of the motorcycle 0 and are integrally coupled to each other. The front end 21a of the crankcase 21 is attached to a bracket 13 integral with the central portion 6c of the down frame 6, and the crankcase A rear end portion 21b of 21 is attached to a bracket 14 integrated with a rear end portion 6e of the down frame 6.

  Further, the crankshaft 25 that is driven to rotate in the width direction of the motorcycle 0 is connected to the output shaft 26 via a transmission (not shown), and the left end portion of the output shaft 26 is located on the left side of the crankcase 21. The drive sprocket 15 is integrally mounted on the left end protruding portion of the output shaft 26, and the driven sprocket 16 is integrally mounted on the rear axle 12 of the rear wheel 11, and the drive sprocket 15 and the driven sprocket 16 are endless. When the chain 17 is suspended and the output shaft 26 rotates counterclockwise with the internal combustion engine 20 operating in the state shown in FIGS. 1 and 2, the drive sprocket 15, the endless chain 17 and the driven The rear wheel 11 is driven to rotate counterclockwise in FIG. 1 via the sprocket 16.

  Furthermore, a combustion chamber (not shown) is formed by a cylinder hole (not shown) of the cylinder block 22 and an inner wall surface of the cylinder block 23. The cylinder block 23 is provided with suction and exhaust valves (not shown). A piston which is not slidably fitted is connected to the crankshaft 25 via a connecting rod (not shown), and the intake and exhaust valves are connected to the crankshaft 25 and are not shown in the figure. The intake and exhaust valves are opened and closed at a required timing by a valve mechanism.

  A fuel tank 18 is disposed above the head cover 24, and a cylinder is formed in a space surrounded by the cylinder block 22, the cylinder head 23, the front surface of the head cover 24, the bottom surface of the fuel tank 18, and the hanging portion 6 b of the down frame 6. A roots-type supercharger 30 in which two screw-shaped rotors with the compressor shaft 30b oriented in the vehicle width direction are integrally mounted on the front surface of the block 22, and a surge tank is disposed above the supercharger 30. 35 and air cleaner 36 are sequentially arranged upward, and these air charger 36, surge tank 35, and air cooler intercooler 37 are positioned above and in front of hanging portion 6b of down frame 6 in front of air cleaner 36. A radiator 38 of the water-cooled internal combustion engine is integrally attached.

The space in the case 30a of the supercharger 30 communicates with the space in the drive pulley chamber provided adjacent to the crank chamber in the crankcase 21, and the driven pulley 32 is connected to the driven shaft 30b of the supercharger 30 in these spaces. An idler pulley 34 that is integrally mounted and absorbs the looseness of the endless belt 33 is disposed between the drive pulley 31 and the driven pulley 32, and the space in the case 30a of the supercharger 30, the crankcase 21, and the cylinder block In an inner space 22, an endless belt 33 is stretched over a drive pulley 31, a driven pulley 32, and an idler pulley 34.
The drive pulley 31 is provided on a drive shaft that is driven by a gear (not shown) provided on the crankshaft. The drive shaft is provided with a gear (not shown) that meshes with the gear of the crankshaft on the crank chamber side, and an oil seal (not shown) is provided in the middle of the shaft. A drive pulley is attached to a drive pulley chamber (not shown).

  An air cleaner 36 located below the fuel tank 18 placed between the front end 3a and the central portion 3b of the main frame 3 receives air from the front or upper side of the vehicle body and is located on the right side of the vehicle body (left side in FIG. 3). Then, a purification intake duct 44 that guides the purified intake air from the air cleaner 36 to the right side of the purified intake inlet 30e of the supercharger 30 is provided. It consists of a tank 37b, a cooling tube 37c communicating with both the upstream tank 37a and the downstream tank 37b, and corrugated fins 37d bent in a meandering manner and bonded to the cooling tubes 37c on both sides. The purified air that has been purified is sent from the supercharger 30 to the upstream tank 37a of the intercooler 37 via the intercooler upstream side communication pipe 39, and is increased in the vehicle width direction. The purified intake air dispersed in the cooling tube 37c provided in a distributed manner and flowing into the downstream tank 37b and cooled by the intercooler 37 is transferred to the surge tank 35 via the intercooler downstream communication pipe 40 shown in FIG. It is supposed to be sent.

  Also, an intake port 27 and an exhaust port 28 (see FIG. 2) communicated in a combustion chamber formed by the cylinder block 22 and the cylinder head 23 so as to be openable and closable via an exhaust valve. The intake port 27 is connected to the surge tank 35 via an electronically controlled throttle valve 41, and the exhaust port 28 is connected to a silencer (not shown) located at the rear of the vehicle body via an exhaust pipe 29. Has been.

  Further, a cooling water passage (not shown) is formed in the walls of the cylinder block 22 and the cylinder head 23 of the internal combustion engine 20, and the cooling water passage outlet on the cylinder head 23 side is connected to the cooling water discharge pipe 42 shown in FIG. Is connected to a cooling water inlet 38 a (see FIG. 4) on the upper side of the radiator 38, and a purified water discharge port 38 b on the lower side of the radiator 38 is provided in the crankcase 21 via a cooling water suction pipe 43. It is connected to a suction port of a cooling water pump (not shown), and a discharge port of this cooling water pump is connected to a cooling water passage inlet (not shown) provided at the lower part of the cylinder block 22.

  Furthermore, a bypass passage connection port 30d is formed in the purified intake air inlet 30e located on the right side of the vehicle body of the supercharger 30 (left side in FIG. 5), and the right side of the vehicle body in the downstream tank 37b of the intercooler 37 (left side in FIG. 4). ), A bypass passage connection port 37e is formed, and the bypass passage connection port 30d and the bypass passage connection port 37e are communicated with each other by a bypass pipe 37f. The pressure in the surge tank 35 is predetermined in the bypass pipe. A bypass flow rate adjusting valve 37g for flowing the purified intake air from the bypass passage connection port 37e of the intercooler 37 toward the bypass passage connection port 30d of the supercharger 30 is interposed so as not to exceed the pressure of the above. The bypass passage connection port 30d may be provided in the purification intake duct 44.

  Since the embodiment shown in FIGS. 1 to 5 is configured as described above, when the internal combustion engine 20 is in operation and the crankshaft 25 rotates, the supercharger 30 corresponds to the rotational speed of the crankshaft 25. Then, the purified intake air that has been rotationally driven and purified by the air cleaner 36 is compressed and heated in the supercharger 30, and the purified intake air that has been compressed and heated is connected to the intercooler in front of the supercharger 30 via the purified intake duct 44. The purified intake air that is supplied to the upstream tank 37a of 37 and compressed and heated is cooled while passing through a number of cooling tubes 37c from the upstream tank 37a, flows into the upper downstream tank 37b, and purified from the downstream tank 37b. The intake air flows into the surge tank 35 located above the supercharger 30 via the purified intake downstream communication pipe 40.

  When the driver on the motorcycle 0 operates the throttle grip, the electronically controlled throttle valve 41 is appropriately opened and closed in conjunction with this, and the surge tank corresponds to the opening of the electronically controlled throttle valve 41. The purified intake air supplied into the engine 35 flows into the combustion chamber via the intake port 27 and an intake valve (not shown), and the motorcycle 0 can travel at a required traveling speed.

  Also defined by a hanging portion 6b of the down frame 6 in the vehicle body 1 of the motorcycle 0 and a cylinder block 22, a cylinder head 23 and a head cover 24 which are provided in the crankcase 21 of the internal combustion engine 20 and are inclined toward the rear side. The supercharger 30, the surge tank 35, and the air cleaner 36 that are stacked from the bottom to the top are disposed in a substantially V-shaped space when viewed from the side of the vehicle, and from the bottom in front of the hanging portion 6 b of the down frame 6. Since the intercooler 37 and the radiator 38 are disposed upward, the entire intake system of the internal combustion engine 20 is compactly integrated. As a result, even when the high-function internal combustion engine 20 is mounted on the vehicle body 1, the motorcycle 0 Overall enlargement can be avoided and the cost can be reduced.

  In addition, the supercharger 30, which is thick and thick enough to withstand high-pressure intake, is integrally attached to the front of the cylinder block 22 inclined rearward, and the intake system of the internal combustion engine 20 is integrated in one place. Since it is attached to the internal combustion engine 20, the center of gravity of the motorcycle 0 can be lowered, the turning inertia moment of the entire internal combustion engine 20 does not increase to the left, and the turning performance of the motorcycle 0 is high.

  Furthermore, since the intake system of the internal combustion engine 20 is integrated and attached to the internal combustion engine 20, the flow resistance of the purified intake air flowing through the intake system and the cooling water for cooling the internal combustion engine 20 is low. As a result of maintaining the level, the power for processing these fluids is also reduced, and the fuel efficiency of the motorcycle 0 is improved.

  In the embodiment shown in FIGS. 1 to 5, a purification intake duct 44 that guides purified intake air from the air cleaner 36 to the supercharger 30 is arranged on the right side of the vehicle body as shown in FIG. 4, and the supercharger 30 is also located on the right side of the vehicle body. 6 and 7 may be arranged on the left side of the vehicle body as shown in FIG. 7, and in this embodiment, the drive pulley 31 and the driven pulley 32 are arranged. The endless belt 33 can be arranged outward from the left side wall of the cylinder block 22, and the drive pulley 31, the driven pulley 32 and the endless belt 33 are arranged in the case 30a of the supercharger 30 in FIGS. Compared to the illustrated embodiment, the structures of the cylinder block 22 and the case 30a of the supercharger 30 are simplified, and cost reduction is possible.

  The embodiments are not limited to those described above, and can be changed as appropriate without departing from the spirit of the invention. For example, the radiator 38 and the intercooler 37 may be arranged side by side in the vehicle width direction so that the longitudinal direction thereof follows the down frame. Further, the intercooler 37 and the radiator 38 may be arranged side by side in the front-rear direction so that the intercooler overlaps the front and the radiator overlaps the rear.

DESCRIPTION OF SYMBOLS 0 ... Motorcycle, 1 ... Vehicle body, 2 ... Head pipe, 3 ... Main frame, 4 ... Pivot plate, 5 ... Seat rail, 6 ... Down frame, 7 ... Sub pipe, 8 ... Front fork, 9 ... Rear fork, 10 ... Front wheel, 11 ... Rear wheel, 12 ... Rear axle, 13 ... Bracket, 14 ... Bracket, 15 ... Drive sprocket, 16 ... Driven sprocket, 17 ... Endless chain, 18 ... Fuel tank,
20 ... Internal combustion engine, 21 ... Crankcase, 22 ... Cylinder block, 23 ... Cylinder head, 24 ... Head cover, 25 ... Crankshaft, 26 ... Output shaft, 27 ... Intake port, 28 ... Exhaust port, 29 ... Exhaust pipe,
30 ... Supercharger, 31 ... Drive pulley, 32 ... Driven pulley, 33 ... Endless belt, 34 ... Idler pulley, 35 ... Surge tank, 36 ... Air cleaner, 37 ... Intercooler, 38 ... Radiator, 39 ... Intercooler upstream communication tube,
40 ... Intercooler downstream communication pipe, 41 ... Electronically controlled throttle valve, 42 ... Cooling water discharge pipe, 43 ... Cooling water suction pipe, 44 ... Purified intake duct

Claims (8)

Body frame (1),
A front fork (8) pivotally supported by the head pipe (2) at the front of the vehicle body frame (1) so as to be pivotable to the left and right, and pivotally supporting the front wheel (10) at the bottom;
An internal combustion engine (20) supported by the body frame (1);
A supercharger (30) is disposed in front of the crankcase (21) of the internal combustion engine (20), and an intercooler (37) that cools the supercharged intake air that has been compressed and heated by the supercharger (30), A surge tank (35) connected to the downstream side of the supercharged intake of the supercharger (30) and receiving the supercharged intake air cooled by the intercooler (37) is connected to the intake port (27) of the internal combustion engine (20). In a saddle-ride type vehicle (0) having a supercharging system configured to be connected,
All the cylinders of the internal combustion engine (20) are inclined toward the rear of the vehicle, and the intake port (27) is disposed on the front side of the cylinder head (23) ,
The surge tank (35) is disposed in front of the cylinder;
A saddle-ride type vehicle, wherein the intercooler (37) is disposed between the front wheel (10) and the internal combustion engine.   The supercharger (30) and the surge tank (35) are provided in a substantially V-shaped space defined by the cylinder and the downtube. The saddle-ride type vehicle according to claim 1, wherein   The saddle riding type vehicle according to claim 1 or 2, wherein an air cleaner (36) connected upstream of the supercharger (30) is disposed above the surge tank (35).   The compressor shaft (30b) of the supercharger (30) is disposed parallel to the vehicle width direction, the supercharged intake outlet of the supercharger (30) is directed forward of the vehicle, and the intercooler (37) is connected to the supercharger. The saddle riding type vehicle according to claim 3, wherein the saddle riding type vehicle is disposed in front of (30).   The purification air intake passage downstream of the air cleaner (36) is disposed so as to pass to the side of the surge tank (35) and is connected to an axial end portion of the supercharger (30). The saddle riding type vehicle described.   The intercooler (37) includes an upstream tank (37a) into which upstream supercharging intake air flows, a plurality of cooling tubes (37c) connected to the upstream tank (37a), and a cooling tube (37c). A downstream tank (37b) to be connected, and a bypass passage communicating with the connection portion is provided on the connection portion side of the purification intake passage and the supercharger (30) of the downstream tank (37b). The saddle riding type vehicle according to claim 5,   The internal combustion engine (20) is water-cooled and has a cooling radiator (38). The cooling radiator (38) is disposed immediately after the front wheel (10), and the cooling radiator (38) The saddle-ride type vehicle according to any one of claims 3 to 6, wherein the intercooler (37) is disposed on an upper side of the intercooler.   A drive pulley (31) connected to the crankshaft (25) of the internal combustion engine (20) and a driven pulley (32) connected to the input shaft of the supercharger (30) adjacent to the crankshaft (25); The saddle-riding type vehicle according to any one of claims 1 to 7, wherein an endless belt (33) is stretched over the belt.

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