JP6613810B2 - Saddle riding vehicle - Google Patents

Description

  The present invention relates to a straddle-type vehicle equipped with a supercharger.

  By providing a supercharger in a straddle-type vehicle such as a motorcycle and supplying air compressed by the supercharger to the combustion chamber of the engine, the thermal efficiency of the engine can be increased and the output can be increased. Patent Document 1 below describes a straddle-type vehicle equipped with a supercharger.

  A straddle-type vehicle described in Patent Document 1 includes an air cleaner that purifies outside air, a supercharger that compresses air purified by the air cleaner, and an intercooler that cools air that has been compressed by the supercharger and becomes high temperature. A cooler and a surge tank that temporarily stores air cooled by the intercooler and then supplies the air to the engine are provided. In the saddle riding type vehicle, the air cleaner and the supercharger are connected by an air intake pipe. The supercharger and the intercooler are connected by air outlet piping. The intercooler and the surge tank are adjacent to each other, and the two are directly connected via a short pipe line.

Japanese Patent Laying-Open No. 2015-74242

  By the way, a straddle-type vehicle that compresses air by a supercharger and supplies it to an engine is provided with a supercharger, an intercooler, and an air outlet pipe that connects them, compared to the case of natural intake. As a result, the number of intake system parts increases. In addition, in the case of a turbocharger (turbocharger) that drives the turbine using engine exhaust gas, it is necessary to supply exhaust gas smoothly to the turbocharger turbine. It is desirable to place a supercharger near the vented exhaust port, and therefore the supercharger is often located in front of the engine. On the other hand, since the intake port of the engine is in the rear part of the engine, the surge tank constituting the downstream side of the intake system is often arranged on the rear side of the engine. Further, the arrangement location of the air cleaner is limited in relation to the layout of a path (duct or the like) for guiding outside air used for fuel combustion to the air cleaner. In addition, the location of the intercooler is also limited by the layout of the path that guides the outside air used for cooling the compressed air to the intercooler. Under such circumstances, it is difficult for a straddle-type vehicle equipped with a supercharger to determine the arrangement of intake system parts and intake pipes connecting the parts around the engine.

  In the saddle-ride type vehicle described in Patent Document 1, the air cleaner is disposed on the lower rear side of the engine, the supercharger is disposed on the lower front side of the engine, and the intercooler and the surge tank are disposed on the rear side of the engine. The air inlet piping connecting the air cleaner and the turbocharger is connected to the lower side of the engine, and the air outlet piping connecting the turbocharger and the intercooler is the engine cylinder or cylinder head. Across the side.

  In enhancing the design of a saddle-ride type vehicle, the appearance of the engine in a side view is important. As in the saddle riding type vehicle described in Patent Document 1, when the air outlet pipe crosses the side of the cylinder or cylinder head of the engine, the appearance of the engine in a side view is deteriorated, and the design of the saddle riding type vehicle is reduced. May decrease.

  In addition, since the air intake pipe or the air outlet pipe is arranged on the side of the engine as in the saddle riding type vehicle described in Patent Document 1, it is difficult for the running wind to hit the engine side. It becomes difficult to cool down. Further, since these pipes are arranged on the side of the engine, an empty space on the side of the engine is reduced, so that it is difficult to secure a space for arranging components on the side of the engine. Further, by arranging these pipes on the side of the engine, the vehicle width of the saddle riding type vehicle is increased, and the light handling property of the saddle riding type vehicle may be impaired.

  The present invention has been made in view of the above-described problems, for example, and an object of the present invention is to improve the designability of the saddle riding type vehicle, the cooling performance of the engine, or the handling performance of the saddle riding type vehicle. It is another object of the present invention to provide a straddle-type vehicle that can easily secure a space for arranging components provided in an engine.

  In order to solve the above problems, a saddle riding type vehicle according to the present invention is connected to a head pipe and the head pipe, and extends backward from the head pipe while expanding to one side and the other side in the vehicle width direction. A vehicle body frame having a pair of frame members, an engine supported between the pair of frame members, an air cleaner for purifying air for fuel combustion, and a supercharger for compressing the air purified by the air cleaner; An intercooler that cools the air compressed by the supercharger and supplies it to the engine, and is connected between the air cleaner and the supercharger, and supplies the air purified by the air cleaner to the supercharger An air intake pipe that connects between the supercharger and the intercooler, and compresses the air compressed by the supercharger. An air outlet pipe for supplying, the supercharger is disposed in front of the engine, the air cleaner and the intercooler are disposed above the engine and above the supercharger, and the air intake pipe Each of the air outlet pipes extends on the one side in the vehicle width direction and extends in the vertical direction from the upper side of the engine to the front side of the engine.

  In this aspect of the present invention, the air intake pipe and the air outlet pipe both pass through the region from the top to the front of the engine and do not cross the side of the engine. Thereby, the external appearance of the engine in a side view can be improved, and the design of the saddle riding type vehicle can be improved. Moreover, since the side of the engine is opened, it is easy for the wind to hit the engine from the side, so that the cooling performance of the engine can be improved, and a space for arranging parts on the side of the engine is easily secured. It becomes possible. Furthermore, the vehicle width can be reduced, and the handling property of the saddle riding type vehicle can be improved. Further, since the air intake pipe and the air outlet pipe are arranged on one side in the vehicle width direction in the region from the upper side to the front side of the engine, other parts are arranged on the other side in the vehicle width direction in the region from the upper side to the front side of the engine. The space to arrange the can be secured. As a result, components such as an electric fan of the radiator and a cooling water pipe for cooling the engine can be arranged on the other side in the vehicle width direction in the region from the top to the front of the engine.

  In the straddle-type vehicle according to the present invention described above, the air intake pipe and the air outlet pipe are arranged between the air intake pipe and the air outlet pipe, and one side in the vehicle width direction of the pair of frame members. It is preferable that the pipe is sandwiched between the frame members.

  According to this aspect of the present invention, both the air intake pipe and the air outlet pipe can be easily piped in a region on one side in the vehicle width direction from the upper side of the engine to the front side. That is, when one of the air intake pipe and the air outlet pipe is arranged between the frame members, both the air intake pipe and the air outlet pipe are arranged outside the frame members, or the air intake pipe and the air outlet Compared to the case where both pipes are arranged between the frame members, the piping layout can be given a margin, and the air intake pipe and the air outlet pipe can be piped without being greatly bent or in a straight line. it can.

  In the straddle-type vehicle of the present invention described above, it is preferable that the air outlet pipe passes between the pair of frame members, and the air intake pipe passes outside between the pair of frame members.

  According to this aspect of the present invention, both the air intake pipe and the air outlet pipe can be easily piped in a region on one side in the vehicle width direction from the upper side of the engine to the front side.

  In the saddle-ride type vehicle of the present invention described above, it is preferable that the air cleaner and the intercooler are arranged side by side in the vehicle width direction.

  According to this aspect of the invention, both the air cleaner and the intercooler are brought close to the upper front region of the engine, or a part of the air cleaner and a part of the intercooler are located in the upper front region of the engine. Can do. As a result, both the air intake pipe and the air outlet pipe can be easily piped in the region from the upper side to the front side of the engine.

  In the saddle-ride type vehicle of the present invention described above, the supercharger includes a turbine unit having a turbine driven by exhaust gas of the engine, and a compressor unit driven by the power of the turbine to compress air. The turbocharger is preferably configured such that the compressor portion is disposed on one side in the vehicle width direction with respect to the turbine portion.

  In this aspect of the present invention, the air intake pipe and the air outlet pipe are respectively connected to the suction side and the discharge side of the compressor portion of the supercharger. Since the turbocharger is arranged so that the compressor part is located on one side in the vehicle width direction from the turbine part, the air intake piping and the air outlet piping are on the one side in the vehicle width direction from the top of the engine to the front. It becomes easy to arrange in the area.

  In the straddle-type vehicle of the present invention described above, the air intake pipe and the air outlet pipe may be arranged along a frame member on one side in the vehicle width direction of the pair of frame members. .

  According to this aspect of the present invention, it becomes easy to arrange the air intake pipe and the air outlet pipe in a region on one side in the vehicle width direction from the upper side of the engine to the front side.

  ADVANTAGE OF THE INVENTION According to this invention, the design property of a straddle-type vehicle, the cooling performance of an engine, or the handleability of a straddle-type vehicle can be improved, and the arrangement space of the components provided in an engine can be ensured easily. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a motorcycle with a supercharger that is an embodiment of a saddle riding type vehicle of the present invention. 1 is a front view of a body frame and an engine unit of a motorcycle with a supercharger that is an embodiment of a saddle riding type vehicle of the present invention. FIG. 3 is a left side view of the vehicle body frame and the engine unit in FIG. 2. FIG. 3 is a right side view of the vehicle body frame and the engine unit in FIG. 2. FIG. 3 is a plan view of a vehicle body frame and an engine unit in FIG. 2. FIG. 3 is a front view showing a state where a radiator is removed from the engine unit in FIG. 2. It is a top view which shows the state which removed the air cleaner, the intercooler, the exhaust duct, the surge tank, etc. in the engine unit in FIG. It is explanatory drawing which shows the inside of the cooling water flow control unit in the motorcycle with a supercharger which is an embodiment of the saddle riding type vehicle of the present invention. It is explanatory drawing which shows arrangement | positioning of a vehicle body frame, an air intake pipe, an air outlet pipe, etc. in the motorcycle with a supercharger which is an embodiment of the saddle riding type vehicle of the present invention. FIG. 3 is an explanatory diagram showing an arrangement of an air cleaner, a supercharger, an intercooler, an air intake pipe, an air outlet pipe, and the like in a motorcycle with a supercharger that is an embodiment of a saddle riding type vehicle of the present invention. FIG. 2 is an explanatory diagram showing an arrangement of an engine, a radiator, an air cleaner, a supercharger, an air intake pipe, an air outlet pipe, and the like in a motorcycle with a supercharger that is an embodiment of the saddle riding type vehicle of the present invention.

(Motorcycle with turbocharger)
FIG. 1 shows a motorcycle with a supercharger which is an embodiment of a saddle riding type vehicle of the present invention. In FIG. 1, for convenience of explanation, portions other than the body frame 211 and the engine unit 11 of the motorcycle with a supercharger are indicated by a two-dot chain line. 2 to 5 are a front view, a left side view, a right side view and a plan view of the vehicle body frame 211 and the engine unit 11, and FIG. 6 is a front view showing a state where the radiator 33 is removed from the engine unit 11. is there. FIG. 7 is a plan view showing a state where the air cleaner 115, the intercooler 131, and the surge tank 154 are removed from the engine unit 11. Further, in the following description of the embodiments, the front, rear, left, right, up and down directions are based on the driver sitting on the supercharger-equipped motorcycle.

  In FIG. 1, a body frame 211 of a supercharged motorcycle 1 which is an embodiment of a saddle riding type vehicle of the present invention is formed by joining a plurality of steel pipes, for example. Specifically, the body frame 211 is disposed on the head pipe 212 disposed on the upper front side of the motorcycle 1 and on the left and right portions of the motorcycle 1, and the front end portion is connected to the upper portion of the head pipe 212. A pair of main frames 213 extending rearward while the rear end side is inclined downward, and the left and right parts of the motorcycle 1, respectively, the front end is connected to the lower part of the head pipe 212, and the rear end is A pair of down tubes 214 that extend rearward while inclining downward largely from the main frame 213, are arranged on the left and right parts of the motorcycle 1, respectively, and the front ends are connected to the intermediate parts of the down tubes 214, respectively. A pair of side frames 215 whose rear end side extends rearward, and a pair of pivot frames joined to the rear end side of the main frame 213, respectively. And a 216. A reinforcing frame 217 is provided between the main frame 213, the down tube 214, and the side frame 215. The down tube 214 is a specific example of the frame member.

  Further, as shown in FIG. 5, the pair of main frames 213 extends rearward from the head pipe 212 while expanding left and right. That is, when the reference line S is a straight line passing through the center of the motorcycle 1 in the left-right direction (vehicle width direction) in the front-rear direction of the motorcycle 1, the front end of the right main frame 213 is centered in the left-right direction of the motorcycle 1. From the arranged head pipe 212, it extends diagonally to the right rear. Thereafter, the main frame 213 on the right side gently curves in the vicinity of the right rear portion of the cylinder head 15 of the engine 12 and then extends rearward in parallel with the reference line S. Thereafter, the right main frame 213 is slightly curved in the vicinity of the rear surface of the cylinder head 15 and extends rearward while inclining slightly to the left so as to gradually approach the reference line S. On the other hand, the left main frame 213 has a shape substantially symmetrical to the right main frame 213 with respect to the reference line S. The pair of down tubes 214 also extends rearward while expanding from the head pipe 212 to the left and right, respectively, in substantially the same manner as the pair of main frames 213. Further, as shown in FIG. 3, the pair of down tubes 214 is positioned below the pair of main frames 213, and a space is formed between the left main frame 213 and the left down tube 214, and the right side A space is formed between the main frame 213 and the right down tube 214.

  As shown in FIG. 1, a steering shaft (not shown) is inserted into the head pipe 212, and a steering bracket 225 is provided at each of an upper end portion and a lower end portion of the steering shaft. A handle 226 is provided on the upper steering bracket 225. The upper and lower steering brackets 225 support the upper portions of a pair of left and right front forks 227, and the front wheels 228 are supported on the lower ends of the front forks 227.

  A front end side of the swing arm 232 is supported between the pair of left and right pivot frames 216 via a pivot shaft 231, and a rear wheel 233 is supported on the rear end side of the swing arm 232. A driven sprocket 234 is provided on the axle of the rear wheel 233, and a chain 235 that transmits power of the engine 12 described later is wound around the driven sprocket 234.

  An engine unit 11 is provided between the front wheel 228 and the rear wheel 233 of the motorcycle 1. The engine unit 11 is mainly disposed between the left main frame 213 and the left down tube 214, and the right main frame 213 and the right down tube 214, and is supported by these frames. A fuel tank 241 is provided above the engine unit 11, and a seat 242 is provided behind the fuel tank 241. A side stand 243 is provided on the left side of the motorcycle 1 and behind the lower part of the engine unit 11. Further, an upper cowl 244 is provided on the front upper side of the motorcycle 1. Further, the motorcycle 1 is provided with an under cowl 245 that mainly covers the front lower side of the engine unit 11.

(Engine unit)
As shown in FIG. 3, the engine unit 11 lubricates the engine 12, a part of a drive system such as a primary speed reduction mechanism that transmits the power of the engine 12 to the rear wheel 233, a clutch, and a transmission, and a movable part of the engine 12. A lubrication system, an intake system (including a supercharger 121) that supplies a mixture of air and fuel to the engine 12, and a part of an exhaust system that exhausts exhaust gas generated by the combustion of the mixture from the engine 12. A cooling system that cools the engine 12 and the like, and an AC generator that generates electric power by utilizing the rotation of the crankshaft.

  In this embodiment, the engine 12 is a water-cooled parallel two-cylinder four-cycle gasoline engine. The engine 12 is provided with a crankcase 13 for accommodating a crankshaft, a cylinder 14 is provided on the crankcase 13, a cylinder head 15 is provided on the cylinder 14, and a cylinder head 15 is provided on the cylinder head 15. A cylinder head cover 16 is provided. An oil pan 17 is provided below the crankcase 13. Further, the cylinder axis of the engine 12 is inclined so that the upper side is positioned in front of the lower side. Further, the engine 12 is provided with a balance shaft that reduces vibrations caused by the movement of the piston. The balance shaft is disposed in front of the crankshaft. Specifically, a balancer chamber 18 is integrally formed at the front portion of the crankcase 13 of the engine 12. The balancer chamber 18 is formed by extending a part of the crankcase 13 forward, and the front portion of the balancer chamber 18 protrudes forward from the front wall portion of the crankcase 13. The balance shaft is provided in the balancer chamber 18. A magneto chamber 19 is provided on the left side of the crankcase 13, and an AC generator is accommodated in the magneto chamber 19.

  Further, as shown in FIG. 4, a part of the drive system such as the primary speed reduction mechanism, the clutch, and the transmission is disposed at the rear portion of the engine unit 11. That is, a transmission case 21 is integrally formed behind the crankcase 13 and the cylinder 14, and the primary reduction mechanism and the transmission are accommodated in the transmission case 21. A clutch cover 22 is attached to the right part of the transmission case 21, and the clutch arranged on the right side of the transmission is covered with the clutch cover 22. As shown in FIG. 3, a sprocket cover 23 is provided on the left part of the transmission case 21, and the drive sprocket arranged on the left side of the transmission is covered with the sprocket cover 23. Further, as shown in FIG. 1, a chain 235 that transmits the power of the engine 12 to the rear wheel 233 is wound around the drive sprocket.

  As shown in FIG. 6, the lubrication system includes an oil pump that pumps up engine oil stored in the oil pan 17 of the engine 12 and supplies it to various parts of the engine 12, an oil filter 25 that filters engine oil, and an engine A water-cooled oil cooler 26 for cooling the oil is provided. The oil filter 25 and the oil cooler 26 are attached to the lower front portion of the engine 12.

  As shown in FIG. 4 or FIG. 7, the cooling system includes a water pump 30, a water jacket (not shown), a radiator 33, and a cooling water flow control unit 41. The water pump 30 is a device that operates using the rotation of the crankshaft and feeds cooling water to the water jacket. The water jacket is a mechanism that is provided in the cylinder 14 and the cylinder head 15 and cools the cylinder 14 and the cylinder head 15 with cooling water.

  The radiator 33 is a device that cools the cooling water by receiving the traveling wind or driving the radiator fan 40 and releasing the heat of the cooling water to the atmosphere. The radiator 33 is disposed in front of the engine 12. Further, the radiator 33 includes an upper radiator 34 and a lower radiator 35. The upper radiator 34 and the lower radiator 35 are connected via a pair of connecting hoses 36. Further, as shown in FIG. 7, the radiator fan 40 is attached to the right side position on the rear surface of the upper radiator 34.

  The cooling water flow control unit 41 is a device that adjusts the amount of cooling water flowing through the radiator 33 in accordance with the temperature of the cooling water and maintains the temperature of the cooling water at an appropriate temperature. FIG. 8 shows the inside of the cooling water flow control unit 41. As shown in FIG. 8, the cooling water flow control unit 41 includes a thermostat housing 42 and a thermostat 43. A left chamber R1 is formed inside the left portion of the thermostat housing 42, and a right chamber R2 is formed inside the right portion. Further, a first cooling water inlet 44 is formed on the left rear side of the thermostat housing 42 to allow cooling water from the water jacket to flow into the left chamber R1. Further, on the left side of the left part of the thermostat housing 42, a second cooling water inlet 45 is formed through which cooling water that has cooled the oil cooler 26 and the supercharger 121 flows into the left chamber R1. Further, a cooling water delivery port 46 for sending the cooling water flowing into the left chamber R1 to the radiator 33 is formed on the left front side of the thermostat housing 42. In addition, a cooling water return port 47 through which the cooling water flowing through the radiator 33 flows into the right chamber R2 is formed on the right front side of the thermostat housing 42. Further, a cooling water outlet 48 for returning the cooling water flowing into the right chamber R <b> 2 to the water pump 30 is formed on the right rear side of the thermostat housing 42. In addition, a cooling water bypass passage 49 for supplying cooling water from the left chamber R1 to the right chamber R2 without flowing the radiator 33 is formed in the thermostat housing 42. Further, a thermostat 43 is provided in the right chamber R2. A water temperature sensor 51 for detecting the temperature of the cooling water flowing through the left chamber R1 is attached to the left portion of the thermostat housing 42.

  The thermostat 43 opens and closes the flow path between the cooling water return port 47 and the cooling water outlet 48 and between the cooling water bypass passage 49 and the cooling water outlet 48 according to the temperature of the cooling water flowing into the right chamber R2. Control the opening and closing of the flow path. Specifically, the thermostat 43 fully closes the flow path between the cooling water return port 47 and the cooling water outlet 48 when the temperature of the cooling water flowing into the right chamber R2 is equal to or lower than a predetermined reference temperature T1. The flow path between the cooling water bypass passage 49 and the cooling water outlet 48 is fully opened. In this case, the cooling water flowing into the left chamber R1 from the first cooling water inlet 44 or the second cooling water inlet 45 does not flow through the radiator 33, but cools through the cooling water bypass passage 49 and the right chamber R2. Return to the water pump 30 from the water outlet 48.

  When the temperature of the cooling water flowing into the right chamber R2 is higher than the reference temperature T1 and equal to or lower than a predetermined reference temperature T2 (T2> T1), the thermostat 43 is connected to the cooling water return port 47 and the cooling water outlet 48. And the cooling water return port 47 and the cooling water flow as the temperature of the cooling water flowing into the right chamber R2 rises. The area of the channel between the outlet 48 is increased, and the area of the channel between the cooling water bypass passage 49 and the cooling water outlet 48 is decreased. In this case, the cooling water that has flowed into the left chamber R1 from the first cooling water inlet 44 or the second cooling water inlet 45 is diverted in the left chamber R1, and flows through the radiator 33 and the cooling water bypass passage 49, respectively. In the chamber R2, they merge and return from the cooling water outlet 48 to the water pump 30. In this case, as the temperature of the cooling water rises, the amount of cooling water flowing through the radiator 33 increases with respect to the amount of cooling water flowing through the cooling water bypass passage 49.

  Further, when the temperature of the cooling water flowing into the right chamber R2 is higher than the reference temperature T2, the thermostat 43 fully opens the flow path between the cooling water return port 47 and the cooling water outlet 48, and the cooling water bypass passage. The flow path between 49 and the cooling water outlet 48 is fully closed. In this case, the cooling water that has flowed into the left chamber R1 from the first cooling water inlet 44 or the second cooling water inlet 45 does not flow through the cooling water bypass passage 49, and the cooling water delivery port 46, the radiator 33, and the cooling water. It flows through the return port 47 and the right chamber R2 and returns to the water pump 30 from the cooling water outlet 48.

  Here, the thermostat 43 moves the main valve body 43B according to the temperature of the valve seat 43A, the main valve body 43B, and the cooling water, and the thermoelement 43C moves the main valve body 43B to and from the valve seat 43A. And. Further, the thermostat 43 is provided with a sub-valve element 43D that moves together with the main valve element 43B. The sub-valve body 43D is seated and separated at a portion where the cooling water bypass passage 49 is open to the right chamber R2. The thermo element 43C moves the main valve body 43B and the sub valve body 43D according to the temperature of the cooling water flowing into the right chamber R2. The main valve body 43B opens and closes the flow path between the cooling water return port 47 and the cooling water outlet 48, and the sub valve body 43D opens and closes the flow path between the cooling water bypass passage 49 and the cooling water outlet 48. To do.

  The arrangement and connection of each part constituting these cooling systems are as follows. That is, as shown in FIG. 4, the water pump 30 is attached to the right side of the crankcase 13. In addition, the water pump 30 is disposed at a position corresponding to the balance shaft located in front of the crankshaft. A path for supplying cooling water from the water pump 30 to the water jacket is formed between the water pump 30 and the water jacket. Further, the cooling water flow control unit 41 is disposed above the cylinder head cover 16, specifically, is disposed on the right front side above the cylinder head cover 16. Further, as shown in FIG. 7, the outlet side of the water jacket and the first cooling water inlet 44 of the cooling water flow control unit 41 are connected by a cylinder outlet hose 52. Further, a radiator inlet hose 53 connects between the cooling water outlet 46 of the cooling water flow control unit 41 and the radiator inlet 37 of the upper radiator 34. Further, a radiator outlet hose 54 connects between the radiator outlet 38 of the upper radiator 34 and the cooling water return port 47 of the cooling water flow control unit 41. The cooling water outlet 48 of the cooling water flow control unit 41 and the cooling water inlet 31 of the water pump 30 are connected by a water pump inlet hose 55. The radiator inlet hose 53, the radiator outlet hose 54, and the water pump inlet hose 55 are collectively arranged in the space between the engine 12 and the radiator 33. Further, the cylinder outlet hose 52, the radiator outlet hose 54, and the water pump inlet hose 55 are gathered and arranged in a right region around the engine 12.

  As shown in FIG. 4, a cooling water supply port 39 is formed on the lower right side of the rear surface of the upper radiator 34, and a lower end portion of a water injection hose 56 extending in the vertical direction is connected to the cooling water supply port 39. A cooling water injection part 58 having a cooling water injection port 57 is provided at the upper end of the water injection hose 56. A reservoir tank 59 for storing cooling water is provided behind the lower radiator 35, and the reservoir tank 59 is connected to, for example, the upper radiator 34 via an overflow line (not shown).

  Further, the cooling system of the engine unit 11 has a configuration for supplying cooling water to the oil cooler 26 and the supercharger 121 in order to cool the engine oil and the supercharger 121. Specifically, the water pump 30 includes a cooling water discharge port 32 and is configured to supply the cooling water to the water jacket and to discharge the cooling water from the cooling water discharge port 32. The cooling water discharged from the cooling water discharge port 32 is supplied to the oil cooler 26 and the supercharger 121 via an inlet branch pipe 61 arranged in front of the engine 12. Further, the cooling water after cooling the engine oil and the supercharger 121 is supplied to the cooling water flow control unit 41 via an outlet branch pipe 62 arranged in front of the engine 12 as shown in FIG. 2 flows into the cooling water inlet 45 and merges with the cooling water flowing into the cooling water flow control unit 41 from the water jacket.

(Intake system and exhaust system structure)
As shown in FIG. 3 or FIG. 6, the intake system includes an air cleaner 115, a supercharger 121, an intercooler 131, an exhaust duct 141, a surge tank 154, an electronic control throttle device 171, and an injector 174. .

  The air cleaner 115 is a device that filters and purifies air for fuel combustion taken from outside. The air cleaner 115 includes a cleaner case 116, and an air filter is provided inside the cleaner case 116. Further, the cleaner case 116 is formed with an air inlet 118 for taking outside air into the cleaner case 116. In FIG. 3 or FIG. 5, the air suction port 118 is schematically shown by a two-dot chain line. The position of the air inlet 118 can be set as appropriate. The air suction port 118 is provided with an air duct that guides outside air to the air suction port 118, but the illustration of the air duct is omitted. As shown in FIG. 6, an air outlet 119 is formed at the front of the air cleaner 115 to allow the filtered air to flow out from the cleaner case 116.

  The supercharger 121 is an exhaust turbine supercharger, and includes a turbine part 122 having a turbine and a compressor part 123. The supercharger 121 drives the turbine of the turbine unit 122 with the exhaust gas from the engine 12, drives the compressor of the compressor unit 123 with the power of this turbine, and the compressor unit 123 supplies the air supplied through the air cleaner 115. Compress. By adopting the supercharger 121, the thermal efficiency of the engine 12 can be increased and the output can be increased as compared with the case of natural intake, and the engine 12 can be reduced in size and size.

  The intercooler 131 is a heat exchanger that cools air that has become hot due to compression of the compressor unit 123 of the supercharger 121. As shown in FIG. 6, the intercooler 131 is an air-cooling type, and as shown in FIG. 6, a passage 132 </ b> A through which the air compressed by the compressor unit 123 circulates and fins that dissipate heat of the air compressed by the compressor unit 123 by receiving outside air. A heat dissipating part 132 having 132B is provided. Moreover, the heat radiating part 132 has a receiving surface 132C for receiving outside air for heat radiation. In addition, an air inlet 133 is formed at the front portion of the intercooler 131 to allow the air supplied from the compressor unit 123 of the supercharger 121 to flow into the passage 132 </ b> A of the heat radiating unit 132. As shown in FIG. 4 or FIG. 5, an air outlet 134 is formed in the rear part of the intercooler 131 to supply the cooled air through the passage 132 </ b> A of the heat radiating part 132 to the surge tank 154. .

  In addition, an air guide duct is provided in front of the intercooler 131 to guide outside air as cooling air to the heat radiating portion 132 of the inter cooler 131, but the illustration of the air guide duct is omitted. Further, as shown in FIG. 5, behind the intercooler 131, the air is guided to the air guide duct and hits the heat radiating portion 132 of the intercooler 131, and the outside air after passing between the fins 132 </ b> B of the heat radiating portion 132 is released to the outside. An exhaust duct 141 is provided.

  The surge tank 154 is a device that rectifies the flow of air compressed by the supercharger 121 and cooled by the intercooler 131. In the surge tank 154, a space for temporarily storing the air cooled by the intercooler 131 is formed. In the present embodiment, the surge tank 154 is formed integrally with the cleaner case 116 of the air cleaner 115. Further, as shown in FIG. 5, an air inlet 156 that allows air supplied from the intercooler 131 to flow into the surge tank 154 is formed on the upper right side of the surge tank 154. In addition, an air outlet (not shown) that allows the air temporarily stored in the surge tank 154 to flow out to the intake passage formed in the throttle body 172 of the electronically controlled throttle device 171 is provided below the surge tank 154. Is formed.

  The electronically controlled throttle device 171 shown in FIG. 3 is a device that adjusts the amount of air that flows through the intercooler 131 and the surge tank 154 and is supplied to the intake port of the engine 12. The electronically controlled throttle device 171 includes a throttle body 172, a throttle valve that is provided inside the throttle body 172, opens and closes an intake passage formed in the throttle body 172, and an electric drive motor 173 that drives the throttle valve. ing.

  The injector 174 is a device that injects fuel into the intake port of the engine 12, and a delivery pipe 175 that supplies fuel from the fuel tank 241 to the injector 174 is connected to the injector 174.

  As shown in FIG. 6, the exhaust system includes an exhaust pipe 191 connecting the exhaust port of the engine 12 and the turbine part 122 of the supercharger 121, and the turbine part 122 and the muffler side of the supercharger 121. A muffler joint pipe 192 to be connected, a muffler (not shown), and the like are provided. Among these, the exhaust pipe 191 constitutes a part of the engine unit 11. The exhaust pipe 191 is disposed in front of the engine 12 and between the exhaust port and the turbine portion 122 of the supercharger 121. In the present embodiment, the exhaust pipe 191 is integrally formed with the housing of the turbine unit 122 of the supercharger 121. Specifically, one end side of two exhaust pipes 191 is connected to the two exhaust ports of the parallel 12-cylinder engine 12, but the other end sides of these exhaust pipes 191 are connected to each other to become one. Further, the other end of the exhaust pipe 191 that is combined into one is integrated with the housing of the turbine section 122 of the supercharger 121. Note that the exhaust pipe 191 and the housing of the turbine section 122 may be formed as separate bodies and connected to each other. On the other hand, one end of the muffler joint pipe 192 is connected to the turbine section 122 of the supercharger 121, and the other end passes through the lower right side of the engine 12 and extends rearward toward the muffler. The muffler is disposed on the lower rear side of the engine 12. Exhaust gas discharged from each exhaust port is supplied into the housing of the turbine section 122 of the supercharger 121 via the exhaust pipe 191. This exhaust gas rotates the turbine of the turbine section 122. Subsequently, the exhaust gas discharged from the turbine unit 122 is supplied to the muffler via the muffler joint pipe 192 and discharged from the muffler to the outside.

  In addition, a waste gate valve 193 is provided in the turbine section 122 of the supercharger 121. In other words, a gate is formed inside the turbine section 122 to flow a part of the exhaust gas supplied through the exhaust pipe 191 to the muffler joint pipe 192 side without supplying it to the turbine. The amount of exhaust gas flowing into the turbine is adjusted by opening and closing the gate.

(Layout and connection of each part of intake system)
9 to 11 show the arrangement and connection of each part constituting the intake system. As shown in FIG. 9, the supercharger 121 is disposed in front of the engine 12, specifically, in front of the cylinder 14. Further, as shown in FIG. 11, the supercharger 121 is disposed above the balancer chamber 18 of the engine 12. The supercharger 121 is located between the engine 12 and the radiator 33. Further, the supercharger 121 is disposed at a position corresponding to between the upper radiator 34 and the lower radiator 35, and the front portion of the supercharger 121 enters the space between the upper radiator 34 and the lower radiator 35. Yes. Moreover, as shown in FIG. 9, the supercharger 121 is arrange | positioned so that the turbine part 122 may become the right side and the compressor part 123 may become the left side. The turbine portion 122 is substantially the center in the left-right direction of the motorcycle 1 and is located below the exhaust port of the engine 12. The compressor unit 123 is located on the left side of the motorcycle 1 and is located on the left side of the reference line G indicating the center in the left-right direction of the motorcycle 1.

  The air cleaner 115 is disposed on the upper left side of the engine 12, specifically, on the upper left side of the cylinder head cover 16. Further, as shown in FIG. 3, the air cleaner 115 is located above the left main frame 213. Further, as shown in FIG. 11, the front portion of the air cleaner 115 is located above the supercharger 121. Further, the air cleaner 115 is disposed at a position overlapping the supercharger 121 in the top view of the motorcycle 1 (see FIG. 5). The air outlet 119 formed at the front portion of the air cleaner 115 is located directly above the supercharger 121. A reference line H in FIG. 11 indicates the position of the supercharger 121 in the front-rear direction.

  Further, as shown in FIG. 9, the intercooler 131 is disposed on the upper right side of the engine 12, specifically, on the upper right side of the cylinder head cover 16. Further, as shown in FIG. 6, the intercooler 131 is disposed above the cooling water flow control unit 41. Further, as shown in FIG. 4, the intercooler 131 is disposed above the right main frame 213. Further, the front part of the intercooler 131 is located above the supercharger 121. In addition, the intercooler 131 is disposed at a position overlapping the supercharger 121 in the top view of the motorcycle 1 (see FIG. 5). Further, the air inlet 133 formed at the front portion of the intercooler 131 is positioned substantially directly above the supercharger 121. In addition, the reference line H in FIG. 4 has shown the position in the front-back direction of the supercharger 121 similarly to the reference line H in FIG. Further, as shown in FIG. 9, the intercooler 131 is located on the right side of the reference line G indicating the center in the left-right direction of the motorcycle 1. That is, in the left-right direction, the intercooler 131 is disposed at a position on the opposite side of the compressor unit 123 of the supercharger 121. Further, as shown in FIG. 5, the intercooler 131 is disposed so that the receiving surface 132 </ b> C of the heat radiating portion 132 is parallel to a portion extending obliquely to the right rear of the front end portion of the right main frame 213. ing. A reference line J in FIG. 5 indicates the extending direction of the front end portion of the right main frame 213.

  As shown in FIG. 10, the air cleaner 115 and the intercooler 131 are arranged in the left-right direction above the engine 12 and are adjacent to each other. In the present embodiment, the intercooler 131 is attached to the right side of the air cleaner 115. Further, as shown in FIG. 5, the air cleaner 115 and the intercooler 131 are located at the leftmost portion of the left main frame 213 and the rightmost portion of the right main frame 213 in the top view of the motorcycle 1. Located between the parts. That is, the air cleaner 115 is located on the right side of the left side of the leftmost main frame 213 and the intercooler 131 is located on the right side of the rightmost main frame 213. Is also on the left. 5, the reference line E indicates the position of the left side of the leftmost main frame 213 that swells to the left, and the reference line F indicates the rightmost part of the main frame 213 that swells to the right. The position in the left-right direction of the right surface of is shown.

  Further, as shown in FIG. 10, the air cleaner 115 and the compressor unit 123 of the supercharger 121 are connected by an air intake pipe 181. One end of the air intake pipe 181 is connected to the air outlet 119 of the air cleaner 115. A connecting portion between the air intake pipe 181 and the air outlet 119 of the air cleaner 115 is located above the supercharger 121 as shown in FIG. Further, the position of the connecting portion in the front-rear direction is the same as the position of the front end portion of the cylinder head cover 16. A reference line K in FIG. 11 indicates the position of the front end portion of the cylinder head cover 16 in the front-rear direction. Note that the position of the connecting portion in the front-rear direction may be set before the position of the front end portion of the cylinder head cover 16. The other end of the air intake pipe 181 is connected to an air suction port 124 that is formed on the left side of the compressor unit 123 of the supercharger 121 and opens to the left. As shown in FIG. 9, the air intake pipe 181 extends on the left side of the engine 12 and extends in the vertical direction from the upper side to the front side of the engine 12. Specifically, the air intake pipe 181 extends a short distance downward from the air outlet 119 of the air cleaner 115 and passes between the left main frame 213 and the left down tube 214 therebetween. Thereafter, the air intake pipe 181 curves and extends downward, and then curves to the right and reaches the air suction port 124 of the compressor unit 123 of the supercharger 121. In the present embodiment, the air intake pipe 181 passes through the left side (outside) of the left down tube 214, but is adjacent to the left down tube 214 so as to be as close as possible to the left and right center of the motorcycle 1. Has been placed. As a result, the air intake pipe 181 is piped such that the leftmost portion of the air intake pipe 181 is substantially equal to the left surface of the magneto chamber 19 of the engine 12 or is located on the right side. The entire air intake pipe 181 is located on the left side of the reference line G. The air intake pipe 181 is curved at both end portions as described above, but most of the air intake pipe 181 extends linearly except for both end portions.

  As shown in FIG. 10, the compressor portion 123 of the supercharger 121 and the intercooler 131 are connected by an air outlet pipe 182. One end of the air outlet pipe 182 is formed at the upper portion of the compressor portion 123 of the supercharger 121 and is connected to an air discharge port 125 that opens upward. The other end of the air outlet pipe 182 is connected to the air inlet 133 of the intercooler 131. The connecting portion between the air outlet pipe 182 and the intercooler 131 is located above the supercharger 121 as shown in FIG. Further, the position of the connecting portion in the front-rear direction is the same as the position of the front end portion of the cylinder head cover 16. Note that the position of the connecting portion in the front-rear direction may be set before the position of the front end portion of the cylinder head cover 16. Further, as shown in FIG. 10, the air outlet pipe 182 extends on the left side of the engine 12 and extends in the vertical direction from the upper side to the front side of the engine 12. Further, the air outlet pipe 182 is located on the right side of the air intake pipe 181 and is located on the inner side of the motorcycle 1 with respect to the air intake pipe 181. As shown in FIG. 9, the air outlet pipe 182 passes between the pair of main frames 213 and the pair of down tubes 214. Further, as shown in FIG. 10, since the air inlet 133 of the intercooler 131 is located to the right of the air outlet 125 of the compressor unit 123 of the supercharger 121, the air outlet pipe 182 moves to the right as it goes upward. However, most of the air outlet pipe 182 except for the upper end is located on the left side of the reference line G. The air outlet pipe 182 extends linearly as a whole.

  Further, as shown in FIG. 9, the air intake pipe 181 and the air outlet pipe 182 are piped with the left down tube 214 interposed therebetween. That is, the air intake pipe 181, the left down tube 214, and the air outlet pipe 182 are arranged in this order from the left side to the right side (from the left outer side to the inner side) of the motorcycle 1. Each of the air intake pipe 181 and the air outlet pipe 182 is piped along a left down tube 214 that extends downward from the center in the left-right direction of the motorcycle 1 when viewed from the front of the motorcycle 1.

  Further, as shown in FIG. 11, both the air intake pipe 181 and the air outlet pipe 182 are arranged in front of the engine 12, that is, between the engine 12 and the radiator 33. That is, one end side of the air intake pipe 181 is connected to the air outlet 119 of the air cleaner 115 located above the front end portion of the cylinder head cover 16, and the other end side of the air intake pipe 181 is connected to the engine 12 and the radiator 33. As a result, the air intake pipe 181 is substantially entirely located in the space between the engine 12 and the radiator 33 or just above the air intake pipe 181. Yes. One end side of the air outlet pipe 182 is connected to the compressor portion 123 of the supercharger 121 disposed between the engine 12 and the radiator 33, and the other end side of the air outlet pipe 182 is connected to the cylinder head cover 16. Is connected to the air inlet 133 of the intercooler 131 located above the front end portion of the engine. As a result, the air outlet pipe 182 is entirely located in the space between the engine 12 and the radiator 33 or directly above it. doing.

  On the other hand, as shown in FIG. 5, the surge tank 154 is disposed on the upper rear side of the engine 12. Specifically, the surge tank 154 is disposed behind the air cleaner 115 and adjacent to the air cleaner 115 in the front-rear direction. The surge tank 154 is disposed at a position close to the intercooler 131 that is disposed adjacent to the right side of the air cleaner 115. Further, in the top view of the motorcycle 1, the air cleaner 115, the intercooler 131, and the surge tank 154 are arranged in a triangle in the region above the engine 12 (for example, connecting the centers of gravity of these three parts with straight lines, respectively) A triangle is formed in the area above the engine 12).

  The intercooler 131 and the surge tank 154 are connected by a connecting pipe 183. The connecting pipe 183 is disposed on the right rear side above the engine 12. Specifically, one end of the connecting pipe 183 is connected to the air outlet 134 of the intercooler 131 and the other end is connected to the air inlet 156 of the surge tank 154. Since the air outlet 134 of the intercooler 131 and the air inlet 156 of the surge tank 154 are close to each other, the length of the connecting pipe 183 connecting the two is short.

  As shown in FIG. 3, the throttle body 172 of the electronically controlled throttle device 171 is disposed between the surge tank 154 and the intake port of the engine 12 on the upper rear side of the engine 12.

  In the intake system thus connected, the air taken in from the outside is usually air cleaner 115, air intake pipe 181, compressor section 123 of supercharger 121, air outlet pipe 182, intercooler 131, connecting pipe 183, The gas is supplied to the intake port of the engine 12 through the surge tank 154 and the throttle body 172 of the electronically controlled throttle device 171 in order.

  Further, as shown in FIG. 11, the intake system of the motorcycle 1 includes an air bypass pipe 184 that connects the air intake pipe 181 and the air outlet pipe 182 without using the compressor section 123 of the supercharger 121. In addition, an air bypass valve 185 that communicates and shuts off the air bypass pipe 184 is provided. The air bypass valve 185 is opened, for example, when the throttle valve is fully closed during deceleration, and the air outlet pipe 182 and the air intake pipe 181 are communicated with each other via the air bypass pipe 184. The compressed air on the downstream side of the compressor unit 123 is released to the upstream side, and the pressure on the downstream side of the compressor unit 123 is reduced.

  The air bypass valve 185 is attached to the air intake pipe 181. In addition, the air bypass valve 185 is disposed slightly above the rear end of the air intake pipe 181 near the compressor portion 123 of the supercharger 121. The air bypass valve 185 is disposed above the crankcase 13 of the engine 12 and is disposed at a position overlapping the front portion of the cylinder 14 in a side view of the motorcycle 1.

  In addition, one end of the air bypass pipe 184 is connected to the air bypass valve 185, and the other end is connected to a slightly upper part of the end close to the supercharger 121 in the air outlet pipe 182. Since both the air intake pipe 181 and the air outlet pipe 182 extend from the compressor portion 123 of the supercharger 121 in the same direction, that is, upward, and are close to each other, the air intake pipe 181 (air bypass valve 185). The length of the air bypass pipe 184 connecting the air outlet pipe 182 and the air outlet pipe 182 is short.

  The air bypass valve 185 may be attached to the air outlet pipe 182, one end of the air bypass pipe 182 may be connected to the air intake pipe 181, and the other end may be connected to the air bypass valve 185.

  As described above, in the motorcycle 1 that is an embodiment of the saddle riding type vehicle of the present invention, the air intake pipe 181 and the air outlet pipe 182 both extend in the vertical direction from the upper side to the front side of the engine 12. And does not cross the side of the cylinder 14 or the cylinder head 15. Therefore, the side surface of the cylinder 14 or the cylinder head 15 can be exposed to the outside, the appearance of the motorcycle 1 can be improved, and the design can be improved. In addition, since the air intake pipe 181 and the air outlet pipe 182 are not arranged on the side of the engine 12, traveling wind can easily hit from the side of the engine 12, and the cooling performance of the engine 12 can be improved. In addition, a space for arranging components on the side of the engine 12 can be easily secured. In addition, the vehicle width can be reduced and the handling performance of the motorcycle 1 can be improved. Further, since both the air intake pipe 181 and the air outlet pipe 182 are concentrated on the left side in the region from the upper side to the front side of the engine 12, an empty space is formed on the right side in the region from the upper side to the front side of the engine 12. In the space, cooling water pipes such as the radiator fan 40 and the water inlet hose 55 can be arranged.

  Further, the air intake pipe 181 and the air outlet pipe 182 are arranged with the left down tube 214 interposed therebetween, and the air intake pipe 181 passes through the left side (outside) of the left down tube 214, and the air outlet pipe 182. Passes through to the right (inner side) of the left down tube 214. Further, the air intake pipe 181 and the air outlet pipe 182 are routed along the left down tube 214. By piping in this way, the air intake pipe 181 and the air outlet pipe 182 can be arranged with a margin in the left region from the top to the front of the engine 12, and the air intake pipe 181 and the air outlet are arranged. The pipe 182 can be arranged in a straight line without greatly bending.

  Further, the air cleaner 115 and the intercooler 131 are arranged side by side above the engine 12, and the air outlet 119 of the air cleaner 115 and the air inlet 133 of the intercooler 131 are located on the upper front side of the engine 12. . Therefore, by connecting the air intake pipe 181 to the air outlet 119 of the air cleaner 115 and connecting the air outlet pipe 182 to the air inlet 133 of the intercooler 131, both the air intake pipe 181 and the air outlet pipe 181 are connected to the engine. 12 can be easily arranged in a region from above to the front, and these pipes can be arranged linearly in the vertical direction, and these pipes can be shortened.

  Further, the compressor portion 123 of the supercharger 121 is disposed on the front left portion of the engine 12. Therefore, by connecting the air intake pipe 181 and the air outlet pipe 182 to the air suction port 124 and the air discharge port 125 of the compressor unit 123, respectively, both the air intake pipe 181 and the air outlet pipe 181 are moved forward from above the engine 12. It can be easily placed in the left region.

  In the above-described embodiment, as shown in FIG. 6, cooling system components such as the water pump 30, the cooling water flow control unit 41, and the water pump inlet hose 55 are arranged on the right side of the motorcycle 1. Although the air cleaner 115, the compressor part 123 of the supercharger 121, the air intake pipe 181 and the intake system parts such as the air outlet pipe 182 are arranged on the left side as an example, the present invention is not limited to this, The arrangement of these parts may be reversed left and right.

  The present invention can also be applied to a straddle-type vehicle including a generalized radiator that is not divided into an upper radiator and a lower radiator. Further, a thermostat having no sub-valve is used as the thermostat 43 of the cooling water flow control unit 41, and the flow path between the cooling water bypass passage 49 and the cooling water outlet 48 is always opened regardless of the temperature of the cooling water. It is good also as a structure to keep. The straddle-type vehicle of the present invention is not limited to a motorcycle, and can be applied to various straddle-type vehicles such as a three-wheeled vehicle and a buggy equipped with an engine.

  Further, the present invention can be appropriately changed without departing from the spirit or idea of the invention which can be read from the claims and the entire specification, and a straddle-type vehicle accompanied with such a change is also applicable to the technology of the present invention. Included in thought.

1 Motorcycle (saddle-ride type vehicle)
DESCRIPTION OF SYMBOLS 11 Engine unit 12 Engine 13 Crankcase 14 Cylinder 15 Cylinder head 16 Cylinder head cover 18 Balancer chamber 33 Radiator 40 Radiator fan 41 Cooling water flow control unit 115 Air cleaner 119 Air outlet 121 Supercharger 122 Turbine part 123 Compressor part 131 Intercooler 132 Heat radiation 133 Air inlet 141 Air exhaust duct 154 Surge tank 181 Air intake pipe (air intake pipe)
182 Air outlet pipe (Air outlet piping)
183 Connecting pipe 184 Air bypass piping 185 Air bypass valve 211 Body frame 212 Head pipe 213 Main frame 214 Down tube (frame member)
215 side frame

Claims (5)

A vehicle body frame having a head pipe and a pair of frame members connected to the head pipe and extending rearward from the head pipe while expanding to one side and the other side in the vehicle width direction;
An engine supported between the pair of frame members;
An air cleaner for purifying air for fuel combustion;
A supercharger that compresses the air purified by the air cleaner;
An intercooler that cools the air compressed by the supercharger and supplies the air to the engine;
An air intake pipe connected between the air cleaner and the supercharger and supplying air purified by the air cleaner to the supercharger;
An air outlet pipe connected between the supercharger and the intercooler and supplying air compressed by the supercharger to the intercooler;
The supercharger is arranged in front of the engine;
The air cleaner and the intercooler are located above the engine and above the supercharger;
The air intake pipe and the air outlet pipe are both on one side in the vehicle width direction and extend in the vertical direction from the top of the engine to the front of the engine ,
The air intake pipe and the air outlet pipe are piped between the air intake pipe and the air outlet pipe with a frame member on one side in the vehicle width direction being sandwiched between the pair of frame members. A straddle-type vehicle. The straddle-type vehicle according to claim 1, wherein the air outlet pipe passes between the pair of frame members, and the air intake pipe passes outside the pair of frame members. The straddle-type vehicle according to claim 1 or 2 , wherein the air cleaner and the intercooler are arranged side by side in the vehicle width direction. The supercharger includes a turbine section having a turbine driven by exhaust gas of the engine, and a compressor section that is driven by power of the turbine and compresses air.
The straddle-type vehicle according to any one of claims 1 to 3 , wherein the supercharger is arranged such that the compressor portion is located on one side in the vehicle width direction with respect to the turbine portion. The air intake pipe and the air outlet pipe, the saddle according to any one of claims 1 to 4, characterized in that it is a pipe along the frame members of which vehicle width direction on one side of the pair of frame members Ride type vehicle.

Images