JP2017081335A - Saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appeal the existence of an air bypass valve and enhance the attractiveness of a supercharger while protecting the air bypass valve.SOLUTION: An air bypass valve 185 is arranged on the left side of a motorcycle and behind an air intake pipe 181 extending in a vertical direction in an area from the upper side to the front side of an engine 12. The air bypass valve 185 is also disposed at a position higher than a crank case 13, more specifically, on the side of a cylinder 14. In addition, the air bypass valve 185 is disposed on the left side of a left side surface of the cylinder 14. This allows a driver to hear air sound during opening of the air bypass valve 185 and makes the air bypass valve 185 easily visible from the outside. On the other hand, the air bypass valve 185 is protected by the air intake valve 181.SELECTED DRAWING: Figure 10

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.

  Further, the saddle riding type vehicle described in Patent Document 1 includes an air bypass pipe that allows compressed air downstream of the supercharger to escape to the upstream side of the supercharger without flowing through the supercharger, and this An air bypass valve that opens and closes the air bypass pipe. For example, when the throttle valve that adjusts the inflow amount of intake air into the engine is fully closed, the air bypass pipe and the air bypass valve let the compressed air on the downstream side of the supercharger escape to the upstream side of the supercharger, It has a function of preventing the pressure in the air outlet piping etc. on the downstream side of the supercharger from becoming excessive.

  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 intake pipe extends in the front-rear direction on the lower left side of the engine, and the air outlet pipe extends in the front-rear direction across the side of the engine cylinder or cylinder head.

  In addition, the air bypass valve is located behind the left part of the supercharger and in front of the left part of the crankcase, and is provided at a substantially intermediate position of the air intake pipe. The air bypass valve is located inside the saddle riding type vehicle with respect to the air intake pipe. The air bypass pipe is disposed in front of the left part of the crankcase (see the air bypass valve (36) and the air bypass hose (37) in FIG. 9 of Patent Document 1).

JP2015-78634A

  By the way, in a vehicle equipped with an engine with a supercharger, when the air bypass valve is opened, air flows from the downstream side to the upstream side of the supercharger via the air bypass valve. Sound is produced. This air noise is a unique sound of an engine with a supercharger and is one of the attractions of an engine with a supercharger.

  In the saddle riding type vehicle described in Patent Document 1, the air bypass valve is disposed at a position corresponding to the lower part of the crankcase of the engine, and the air bypass valve is at a low position. The head of the driver sitting on the vehicle is separated from the air bypass valve. As a result, there is a problem that it is difficult for the driver to hear the air sound when the air bypass valve is opened.

  In addition, the air bypass valve is disposed on the inner side of the saddle riding type vehicle than the air intake pipe, and is in a position where the air bypass valve has entered the lower side of the engine as viewed from the driver sitting on the seat of the saddle riding type vehicle. For this reason, since the engine is interposed between the driver's head and the air bypass valve, it is difficult for the air sound when the air bypass valve is opened to reach the driver's ear.

  Further, in order to appeal the appeal of the engine with a supercharger, it is desirable to arrange the air bypass valve at a position where it can be easily seen from the outside. In this regard, in the saddle riding type vehicle described in Patent Document 1, since the air bypass valve is disposed at the lower part of the engine and inside the saddle riding type vehicle, the air bypass valve is difficult to see from the outside.

  On the other hand, it is necessary to protect the air bypass valve by a collision of flying stones during traveling.

  The present invention has been made in view of, for example, the above-described problems. An object of the present invention is to protect the air bypass valve while appealing the presence of the air bypass valve. An object of the present invention is to provide a saddle-ride type vehicle that can enhance its attractiveness.

  In order to solve the above problems, a saddle riding type vehicle according to the present invention is purified by an engine having a cylinder and a cylinder head provided above a crankcase, an air cleaner for purifying fuel combustion air, and the air cleaner. A supercharger that compresses air, an intercooler that cools air compressed by the supercharger and supplies the air to the engine, and is connected between the air cleaner and the supercharger, and is purified by the air cleaner. An air intake pipe for supplying the air to the supercharger, and an air outlet pipe connected between the supercharger and the intercooler for supplying the air compressed by the supercharger to the intercooler; Provided between the air outlet pipe and the air intake pipe, the compressed air downstream of the turbocharger An air bypass passage for escaping to the upstream side of the supercharger without circulating in the machine, and an air bypass valve for opening and closing the air bypass passage, the supercharger is disposed in front of the engine, and the air cleaner It is arranged above the engine, the air intake pipe extends in the vertical direction on one side in the vehicle width direction and extends from the top of the engine to the front of the engine, and the air bypass valve is connected to the air intake pipe. It is arrange | positioned back, It is characterized by the above-mentioned.

  According to this aspect of the present invention, the air bypass valve is disposed behind the air intake pipe extending in the vertical direction on the one side in the vehicle width direction and extending from the top to the front of the engine. The position can be increased, and the distance between the head of the driver sitting on the seat of the saddle riding type vehicle and the air bypass valve can be shortened. Therefore, the driver can easily hear the air sound when the air bypass valve is opened. Further, by increasing the position of the air bypass valve, it is easy to dispose the air bypass valve at a position that is easily visible from the outside. Further, by disposing the air bypass valve behind the air intake pipe, it is possible to prevent the air bypass valve from being exposed in front of the saddle riding type vehicle. Therefore, it is possible to prevent the flying stone from the front from hitting the air bypass valve and damaging the air bypass valve.

  In the straddle-type vehicle of the present invention, it is preferable that the air bypass valve is disposed at a position higher than the crankcase.

  According to this aspect of the present invention, by raising the position of the air bypass valve, it is possible to make it easier for the driver to hear the air sound when the air bypass valve is opened, and to place the air at a position that is easily visible from the outside. It becomes easy to arrange the bypass valve.

  In the straddle-type vehicle according to the present invention, it is preferable that the air bypass valve is disposed on one side with respect to one side surface of the cylinder in the vehicle width direction.

  According to this aspect of the present invention, the position of the air bypass valve is on the outer side in the vehicle width direction of the saddle riding type vehicle. As a result, since the engine is not interposed between the head of the driver sitting on the seat of the saddle riding type vehicle and the air bypass valve, the air noise when the air bypass valve is opened easily reaches the driver's ear. Become. In addition, the air bypass valve can be easily seen from the outside.

  In the straddle-type vehicle of the present invention, it is preferable that the air bypass valve is disposed at a position overlapping the cylinder in a side view of the straddle-type vehicle.

  According to this aspect of the present invention, by raising the position of the air bypass valve, it is possible to make it easier for the driver to hear the air sound when the air bypass valve is opened, and to place the air at a position that is easily visible from the outside. It becomes easy to arrange the bypass valve.

  In the straddle-type vehicle of the present invention, it is preferable that the air outlet pipe is located between the air bypass valve and the supercharger.

  According to this aspect of the present invention, by interposing the air outlet pipe between the air bypass valve and the supercharger, the heat of the supercharger can be hardly transmitted to the air bypass valve. The air bypass valve can be protected from heat.

  In the straddle-type vehicle of the present invention, the intercooler is disposed above the engine, and the air outlet pipe is located on one side in the vehicle width direction and extends from the top of the engine to the front of the engine. The air bypass passage is formed by piping connecting between the air intake piping and the air outlet piping, which is disposed on the other side of the air intake piping and extends in substantially the same direction as the air intake piping. It is good also as the structure currently made.

  According to this aspect of the present invention, the air intake pipe and the air outlet pipe each extend in substantially the same direction in the same region, and therefore both pipes are close to each other. Therefore, the air bypass passage connecting the air outlet pipe and the air intake pipe can be formed by a short pipe. Therefore, it is possible to improve the air flow when the air bypass valve is opened.

  ADVANTAGE OF THE INVENTION According to this invention, presence of an air bypass valve can be appealed, aiming at protection of an air bypass valve, and the charm of the engine with a supercharger can be heightened.

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. 1 is an explanatory diagram showing a cooling water flow control unit, a cylinder outlet hose, a radiator inlet hose, a radiator outlet hose, a water pump inlet hose, and the like in a motorcycle with a supercharger that is an embodiment of a 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. 1 is an explanatory diagram showing a supercharger, an air intake pipe, an air outlet pipe, an air bypass pipe, and an air bypass valve in a motorcycle with a supercharger that is an embodiment of a saddle riding type vehicle of the present invention. It is explanatory drawing which shows the air intake pipe, air outlet pipe, air bypass piping, air bypass valve, etc. which were seen from the arrow XII-XII direction in FIG.

(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. 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.

  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, 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 pump 30 is disposed on the right side of the crankcase 13 and in front of the crankshaft.

  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. 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.

  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, the radiator fan 40 is attached to the right side position on the rear surface of the upper radiator 34 (see FIG. 7).

  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. 7 is a view of the front portion of the engine unit 11 from which the air cleaner 115, the intercooler 131, the surge tank 154, and the like are removed, as viewed from above. In FIG. 7, in order to make the cooling water flow control unit 41, the cylinder outlet hose 52, the radiator inlet hose 53, the radiator outlet hose 54, the water pump inlet hose 55, etc. conspicuous, the engine 12, the radiator 33, etc. are shown by two-dot chain lines. Yes. As shown in FIG. 7, the cooling water flow control unit 41 is disposed on the right front side above the cylinder head cover 16.

  Inside the left part of the cooling water flow control unit 41, a passage P1 for supplying the cooling water flowing out from the water jacket to the radiator 33 is formed. A cylinder outlet hose 52 is connected between the inflow side of the passage P1 and the outflow side of the water jacket, and a radiator inlet hose 53 is connected between the outflow side of the passage P1 and the radiator inlet 37 of the radiator 33. Has been.

  In addition, a passage P <b> 2 for returning the cooling water flowing out from the radiator 33 to the water pump 30 is formed inside the right portion of the cooling water flow control unit 41. A radiator outlet hose 54 is connected between the radiator outlet 38 of the radiator 33 and the inflow side of the passage P2, and a water pump is connected between the outflow side of the passage P2 and the cooling water suction port 31 of the water pump 30. An inlet hose 55 is connected.

  A cooling water bypass passage Pb that connects the passage P1 and the passage P2 is formed in the cooling water flow control unit 41.

  Further, a thermostat 43 is provided inside the cooling water flow control unit 41. The thermostat 43 adjusts the amount of cooling water flowing through the radiator 33 according to the temperature of the cooling water. That is, when the temperature of the cooling water is equal to or lower than the predetermined reference temperature T1, the thermostat 43 causes the water to be cooled by the water pump 30, the water jacket, the cylinder outlet hose 52, the passage P1, the cooling water bypass passage Pb, the passage P2, and the water pump inlet. The flow of the cooling water is controlled so as to flow through the first circulation path formed by the hose 55 so that the cooling water does not flow through the radiator 33. On the other hand, when the temperature of the cooling water is higher than a predetermined reference temperature T2 (T2> T1), the thermostat 43 causes the cooling water to flow through the water pump 30, the water jacket, the cylinder outlet hose 52, the passage P1, the radiator inlet hose 53, and the radiator. 33, the flow of the cooling water is controlled so as to flow through the second circulation path formed by the radiator outlet hose 54, the passage P <b> 2 and the water pump inlet hose 55, so that the cooling water flows through the radiator 33. On the other hand, when the temperature of the cooling water is higher than the reference temperature T1 and lower than the reference temperature T2, the thermostat 43 causes the cooling water to flow so that the cooling water flows through both the first circulation path and the second circulation path. Is controlled so that a part of the cooling water flows through the radiator 33.

  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 flows through the outlet branch pipe 62 disposed in front of the engine 12 as shown in FIG. It flows into the passage P1.

(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 unit 123 with the power of the turbine, and compresses the air supplied through the air cleaner 115 with the compressor unit 123. . The compressor unit 123 includes an air suction port 124 that sucks air supplied through the air cleaner 115 into the compressor unit 123, and an air discharge port that discharges compressed air from the compressor unit 123 and supplies the compressed air to the intercooler 131. 125. 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 to the surge tank 154 through the passage 132 </ b> A of the heat radiating part 132. .

  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)
8 to 10 show the arrangement and connection of each part constituting the intake system. As shown in FIG. 8, the supercharger 121 is disposed in front of the engine 12, specifically, in front of the cylinder 14. As shown in FIG. 10, the supercharger 121 is disposed above the balancer chamber 18 of the engine 12. Moreover, as shown in FIG. 8, 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. As shown in FIG. 10, the front part of the air cleaner 115 is located above the supercharger 121, and the air outlet 119 formed at the front part of the air cleaner 115 is directly above the supercharger 121. Is located.

  As shown in FIG. 8, 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, the front part of the intercooler 131 is located above the supercharger 121, and the air inlet 133 formed in the front part of the intercooler 131 is located substantially above the supercharger 121. . Further, as shown in FIG. 8, 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. 9, the air cleaner 115 and the intercooler 131 are arranged side by side 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. 9, the air cleaner 115 and the compressor portion 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. 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. 8, 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 so that the leftmost portion of the air intake pipe 181 is substantially the same as 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. 9, 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. Further, as shown in FIG. 9, the air outlet pipe 182 extends on the left side of the engine 12 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. 8, the air outlet pipe 182 passes between the pair of main frames 213 and between the pair of down tubes 214. Further, as shown in FIG. 9, 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, so that 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. 8, the air intake pipe 181 and the air outlet pipe 182 are arranged 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. In addition, the air intake pipe 181 and the air outlet pipe 182 are arranged side by side in the left region of the motorcycle 1, and both extend in substantially the same direction, that is, the vertical direction. Each of the air intake pipe 181 and the air outlet pipe 182 is piped along a left down tube 214 extending leftward and downward from the center in the left-right direction of the motorcycle 1 when viewed from the front of the motorcycle 1.

  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.

(Bypass between the upstream and downstream sides of the turbocharger)
In addition, as shown in FIG. 10, the intake system of the motorcycle 1 includes an air bypass passage that connects the air intake pipe 181 and the air outlet pipe 182 without using the compressor portion 123 of the supercharger 121. An air bypass pipe 184 and an air bypass valve 185 that communicates and shuts off the air bypass pipe 184 are provided. The air bypass valve 185 is, for example, an electromagnetic valve, and the opening and closing of the air bypass valve 185 is controlled by a control signal from a control unit provided in the motorcycle 1. 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.

  FIG. 11 shows the air bypass pipe 184 and the air bypass valve 185 together with the supercharger 121, the air intake pipe 181 and the air outlet pipe 182. FIG. 12 shows the air bypass pipe 184, the air bypass valve 185, and the like as seen from the direction of arrows XII-XII in FIG.

  As shown in FIG. 11, the air bypass valve 185 is disposed behind an air intake pipe 181 that extends in the vertical direction on the left front of the engine 12. Specifically, the air bypass valve 185 is attached to the rear portion of the end of the air intake pipe 181 connected to the air suction port 124 of the compressor portion 123 of the supercharger 121 using a bolt or the like.

  As shown in FIG. 10, the air bypass valve 185 is disposed at a position higher than the crankcase 13. Specifically, the air bypass valve 185 is located on the front side of the cylinder 14. That is, the air bypass valve 185 is disposed at a position overlapping the front portion of the cylinder 14 in a side view of the motorcycle 1. A reference line H in FIG. 10 indicates the boundary between the crankcase 13 and the cylinder 14.

  Further, as shown in FIG. 9, the air bypass valve 185 is disposed on the left side of the left side surface of the cylinder 14 in the vehicle width direction. In addition, as shown in FIG. 5, a part of the air bypass valve 185 is located on the left side of the left main frame 213 swelled to the left most. Further, as shown in FIG. 11, an air outlet pipe 182 is located between the air bypass valve 185 and the supercharger 121.

  As shown in FIG. 12, the air bypass pipe 184 is a hose, for example, and one end side thereof is connected to the air outlet pipe 182 and the other end side is connected to the air bypass valve 185. Specifically, one end side of the air bypass pipe 184 is connected to the left part of the portion of the air outlet pipe 182 that is connected to the air outlet 125 of the compressor unit 123 of the supercharger 121. The other end side of the air bypass pipe 184 is connected to the lower part of the air bypass valve 185. In the present embodiment, the air bypass pipe 184 is curved as shown in FIG. When the air bypass valve 185 is opened, a passage is formed from the air outlet pipe 182 to the air intake pipe 181 through the air bypass pipe 184 and the air bypass valve 185. On the other hand, when the air bypass valve 185 is closed, the passage is blocked.

  As described above, according to the motorcycle 1 that is an embodiment of the saddle riding type vehicle of the present invention, the air that extends on the left side of the motorcycle 1 from the upper side of the engine 12 to the front side in the vertical direction. By disposing the air bypass valve 185 behind the intake pipe 181, the position of the air bypass valve 185 can be increased. That is, the air bypass valve 185 can be disposed at a position higher than the crankcase 13, specifically, on the side of the cylinder 14. By disposing the air bypass valve 185 at such a high position, the air bypass valve 185 can be brought close to the head of the driver sitting on the seat 242 of the motorcycle 1. Therefore, the driver can easily hear the air sound when the air bypass valve 185 is opened.

  Further, the air bypass valve 185 can be positioned on the left outer side of the motorcycle 1 by arranging the air bypass valve 185 behind the air intake pipe 181 that extends in the vertical direction on the left front of the engine 12. That is, the air bypass valve 185 can be positioned on the left side of the left side surface of the cylinder 14. As a result, since the engine 12 does not intervene between the driver sitting on the seat 242 of the motorcycle 1 and the air bypass valve 185, the air sound when the air bypass valve 185 is opened easily reaches the driver's ear. .

  Thus, by making it easier for the driver to hear the air sound when the air bypass valve 185 is opened, the presence of the air bypass valve 185 can be appealed, and the attractiveness of the engine 12 with the supercharger can be enhanced. it can.

  Further, by disposing the air bypass valve 185 at a high and left outer position, the air bypass valve 185 can be easily positioned at a place where it can be easily seen from the outside. For example, in order to enhance the design of the motorcycle 1, when the side surfaces of the cylinder 14 and the cylinder head 16 are exposed outside without being covered with a cowl in a side view of the motorcycle 1, the motorcycle 1 is disposed on the side of the cylinder 14. The air bypass valve 185 can also be exposed to the outside. Thus, even if the air bypass valve 185 is arranged at a position where it can be easily seen, the presence of the air bypass valve 185 can be appealed, and the attractiveness of the engine 12 with the supercharger can be enhanced.

  Further, by disposing the air bypass valve 185 behind the air intake pipe 181, it is possible to prevent the air bypass valve 185 from being exposed to the front of the motorcycle 1. Therefore, it is possible to prevent the flying stone from the front from hitting the air bypass valve 185 and damaging the air bypass valve 185.

  Moreover, according to the motorcycle 1, since the air outlet pipe 182 is interposed between the air bypass valve 185 and the supercharger 121, the heat of the supercharger 121 can be hardly transmitted to the air bypass valve 185. The air bypass valve 185 can be protected from the heat of the supercharger 121.

  In addition, according to the motorcycle 1, the air bypass pipe 184 connects the air intake pipe 181 and the air outlet pipe 182 that are close to each other and extend side by side in the vertical direction. The pipe 184 can be shortened, and the air flow in the air bypass pipe 184 can be improved.

  In the above-described embodiment, the air bypass valve 185 is attached to the air intake pipe 181, one end side of the air bypass pipe 184 is connected to the air outlet pipe 182, and the other end side is connected to the air bypass valve 185. The bypass valve 185 may be attached to the air outlet pipe 182, one end side of the air bypass pipe 184 may be connected to the air bypass valve 185, and the other end side may be connected to the air intake pipe 181.

  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. In this case, the air bypass pipe 184 and the air bypass valve 185 are arranged on the right side of the motorcycle 1.

  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 115 Air cleaner 121 Supercharger 122 Turbine part 123 Compressor part 131 Intercooler 181 Air intake pipe (air intake piping)
182 Air outlet pipe (Air outlet piping)
184 Air bypass piping 185 Air bypass valve

Claims (6)

An engine provided with a cylinder and a cylinder head above the crankcase;
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;
An air bypass passage that is provided between the air outlet pipe and the air intake pipe and allows the compressed air on the downstream side of the supercharger to escape to the upstream side of the supercharger without circulating in the supercharger When,
An air bypass valve for opening and closing the air bypass passage,
The supercharger is arranged in front of the engine;
The air cleaner is disposed above the engine;
The air intake pipe is on one side in the vehicle width direction and extends in a vertical direction in a region extending from above the engine to the front of the engine,
The straddle-type vehicle, wherein the air bypass valve is disposed behind the air intake pipe.   The straddle-type vehicle according to claim 1, wherein the air bypass valve is arranged at a position higher than the crankcase.   The straddle-type vehicle according to claim 1 or 2, wherein the air bypass valve is disposed on one side of a side surface of the cylinder in the vehicle width direction.   The straddle-type vehicle according to any one of claims 1 to 3, wherein the air bypass valve is disposed at a position overlapping the cylinder in a side view of the straddle-type vehicle.   The straddle-type vehicle according to any one of claims 1 to 4, wherein the air outlet pipe is located between the air bypass valve and the supercharger. The intercooler is disposed above the engine,
The air outlet pipe is disposed on the other side of the air intake pipe in an area from one side in the vehicle width direction to the front of the engine in the vehicle width direction, and extends in substantially the same direction as the air intake pipe. And
The straddle-type vehicle according to any one of claims 1 to 5, wherein the air bypass passage is formed by a pipe connecting the air intake pipe and the air outlet pipe.

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