JP6171790B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle, and more particularly to an arrangement structure of components around an intake system of the engine.

  In vehicles such as motorcycles, in order to improve engine fuel efficiency and output, a combination of engine displacement reduction and turbocharger is used, that is, engine displacement is reduced and intake efficiency is improved simultaneously with the turbocharger. May do.

  When a supercharger is used, the air pressurized by the supercharger becomes high temperature, and as a result, the intake efficiency decreases. An intercooler is added to cool the intake air without sacrificing intake efficiency. Thus, when using a supercharger, an intercooler is usually used together.

JP 2010-163891 A

As described above, in an engine that uses both a supercharger and an intercooler, efficient cooling of intake air by the intercooler and effective component arrangement and piping for reducing turbo lag (response delay) are required. The Conventionally, it has not been easy for motorcycles or the like to meet this type of request within a limited space.
Patent Document 1 discloses a structure in which a throttle body, an intercooler, and an air cleaner are arranged in the order from the cylinder head of the engine in the order between the seat rails.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a motorcycle that realizes an effective arrangement structure of components around an engine intake system.

The motorcycle according to the present invention includes an engine having an exhaust port to which an exhaust pipe is connected on the front side of the cylinder head and an intake port to which a throttle body is connected on the rear side thereof, and is disposed on the front side of the engine for inhalation. In a motorcycle comprising: a supercharger that compresses combustion air; an intercooler that cools air compressed by the supercharger; and a surge tank that flows air from the intercooler to a throttle body. The throttle body and the surge tank are disposed behind the cylinder head, and the intercooler is disposed behind the cylinder head and the throttle body and adjacent to the surge tank. feeding machine provided in front of the intercooler, the intercooler, the radiator Are arranged in a manner facing the side is the rear wheel in the space above and wherein Rukoto.

  Further, in the motorcycle according to the present invention, the intercooler is characterized in that an air inlet and an outlet are set on one side, and an internal air flow path is substantially U-shaped.

  In the motorcycle according to the present invention, the intercooler is disposed below the seating seat, and at least a part of the intercooler is located rearward of the seating seat front end in a plan view of the vehicle body.

  In the motorcycle according to the present invention, the intercooler partially overlaps the surge tank in the vertical direction.

  In the motorcycle according to the present invention, the intercooler is disposed such that its longitudinal direction extends in the longitudinal direction of the vehicle body.

According to the present invention, by disposing the intercooler adjacent to the surge tank, the air path between them can be shortened and the throttle response is improved. Moreover, since piping can be reduced, it leads also to weight reduction and the number of parts reduction. Further, by disposing the intercooler behind the engine, the layout in front of the engine in which the radiator, the exhaust pipe, and the supercharger are disposed can be facilitated.
Further, by arranging the supercharger in front of the intercooler, the supercharger is arranged in the vicinity of the engine, and the intake system parts can be concentrated, so that the piping can be shortened and simplified.

1 is a side view of a motorcycle according to an embodiment of the present invention. 1 is a front perspective view of a motorcycle according to an embodiment of the present invention. 1 is a rear perspective view of a motorcycle according to an embodiment of the present invention. It is a side view around an engine unit according to an embodiment of the present invention. It is a top view around the engine unit according to the embodiment of the present invention. It is a bottom view around the engine unit according to the embodiment of the present invention. It is a perspective view which shows the surroundings of the intake system of the engine unit which concerns on embodiment of this invention. 1 is a left side view of an engine including an intake system and the like according to an embodiment of the present invention. 1 is a right side view of an engine including an intake system and the like according to an embodiment of the present invention. 1 is a top view of an engine including an intake system and the like according to an embodiment of the present invention. It is a figure which shows typically the distribution | circulation route of the intake air in the intake system which concerns on embodiment of this invention. It is a perspective view which shows the intercooler which concerns on embodiment of this invention.

Hereinafter, preferred embodiments of a motorcycle according to the present invention will be described with reference to the drawings.
1 to 3 show a schematic configuration of a motorcycle 100 as an application example of the present invention. FIG. 1 is a side view, FIG. 2 is a front perspective view, and FIG. 3 is a rear perspective view. First, the overall configuration of the motorcycle 100 will be described with reference to these drawings. In the drawings used in the following description, including FIGS. 1 to 3, the front of the vehicle is indicated by an arrow Fr, the rear of the vehicle is indicated by an arrow Rr, and the lateral right side of the vehicle is indicated by an arrow R as necessary. Thus, the left side of the vehicle is indicated by an arrow L.

  In FIG. 1 to FIG. 3, two front forks 103 are provided at the front of a vehicle body frame 101 (main frame) made of steel or aluminum alloy so as to be turnable left and right by a steering head pipe 102. It is done. A handle bar 104 is fixed to the upper end of the front fork 103 via a steering bracket 105. A front wheel 106 is rotatably supported on the lower portion of the front fork 103, and a front fender 107 is fixed so as to cover the upper portion of the front wheel 106.

  The vehicle body frame 101 is integrally coupled to the rear portion of the steering head pipe 102, branches in a bifurcated pair of left and right sides toward the rear, and extends while being widened rearward and downward from the steering head pipe 102. In this example, it may be a so-called twin spar type frame that is adopted as suitable for a vehicle or the like that requires high speed performance. Although not shown, the seat rail extends rearward from the vicinity of the rear portion of the vehicle body frame 101 with a moderate amount of rearward rise, and supports the seat 108 (seat seat). The vehicle body frame 101 has a three-dimensional structure in which the vehicle body frame 101 is bent or bent downward in the vicinity of the rear end portion thereof, the left and right sides are coupled to each other at the lower end thereof, and a space is formed inside as a whole.

  A swing arm 110 is coupled to the vicinity of the rear end of the body frame 101 via a pivot shaft 109 so as to be swingable in the vertical direction. A rear wheel 111 is rotatably supported at the rear end of the swing arm 110. In this example, the rear wheel 111 is cantilevered on the rear side of the swing arm 110. A rear shock absorber 112 is mounted between the vehicle body frame 101 and the swing arm 110. In particular, the lower end side of the rear shock absorber 112 is connected to both the vehicle body frame 101 and the swing arm 110 via a link mechanism 113. . A driven sprocket 114 around which a chain 118 that transmits engine power, which will be described later, is wound is attached to the rear wheel 111, and the rear wheel 111 is rotationally driven through the driven sprocket 114. An inner fender 115 covering the vicinity of the front upper portion is provided in the immediate vicinity of the rear wheel 111.

  In the exterior of the vehicle, although not shown in detail, the front part and the left and right side parts of the vehicle are mainly covered by a cowling or a side cowl. In addition, a seat cover or a seat cowl 116 is attached around the seat 108 at the rear portion of the vehicle, and a so-called streamlined vehicle exterior form is formed by these exterior members. A fuel tank 117 is mounted on the front side of the seat 108.

  The engine unit 10 is mounted substantially in the center of the motorcycle 100. 4 to 6, the engine unit 10 includes an engine 11, and a water-cooled multi-cylinder four-cycle gasoline engine is used in the present embodiment. The engine 11 is a parallel two-cylinder engine in which # 1 and # 2 cylinders are arranged side by side in the left and right (vehicle width direction). A cylinder 13 and a cylinder head are disposed above a crankcase 12 that houses a crankshaft supported horizontally on the left and right. 14 and the cylinder head cover 15 are integrally coupled so as to overlap one another (FIG. 4), and an oil pan 16 is attached to the lowermost part. Note that the cylinder axis of the engine 11 is moderately inclined forward, and the oil pan 16 is substantially biased to the left. The engine 11 is suspended and coupled to the vehicle body frame 101 via a plurality of engine mounts so as to be integrally coupled and supported on the inside of the vehicle body frame 101, and acts as a rigid member of the vehicle body frame 101 by itself.

  A transmission case 17 is coupled to the rear portion of the crankcase 12, and a countershaft and a plurality of transmission gears (not shown) are disposed in the transmission case 17. The power of the engine unit 10 is finally transmitted from the crankshaft through a transmission to a drive sprocket 18 (see FIG. 4 and the like) which is an output end of the engine unit 10, and the drive sprocket 18 transmits a power transmission chain 118 (see FIG. 1). The driven sprocket 114, and thus the rear wheel 111, is driven to rotate.

  Note that the crankcase 12 and the transmission case 17 are integrally coupled to each other and constitute a casing assembly of the engine unit 10 as a whole. A plurality of auxiliary machines including a starter motor for starting the engine, a clutch device, and the like are mounted or coupled at appropriate positions of the casing assembly, and the entire engine unit 10 including these is supported by the vehicle body frame 101.

  The engine 11 further includes an intake system that supplies air (intake air) and an air-fuel mixture supplied from an air cleaner and a fuel supply device (which will be described later), and exhaust gas after combustion is supplied to the engine 11. An exhaust system exhausted from the engine, a cooling system that cools the engine 11, a lubrication system that lubricates the movable part of the engine 11, and a control system (ECU; Engine Control Unit) that controls the operation thereof are attached. A plurality of functional systems cooperate with the above-mentioned auxiliary machines and the like by the control of the control system, whereby the engine unit 10 as a whole is smoothly operated.

  More specifically, first, an intake port 19 (intake port; see FIG. 4) is opened on the rear side of the cylinder head 14 in both the # 1 and # 2 cylinders in the intake system, and an intake pipe 21 (intake pipe) is formed in the intake port 19. ) Is connected to the throttle body 20. The throttle body 20 is provided with a throttle valve (not shown) that opens and closes an intake passage formed in the throttle body 20 in accordance with the accelerator opening, and controls the flow rate of air supplied from an air cleaner, which will be described later. Is done. In this example, the throttle valve shafts of # 1 and # 2 cylinders are arranged coaxially, and have a valve drive mechanism 22 that drives them electrically or electromagnetically. On the other hand, each throttle body 20 is provided with an injector 23 for fuel injection downstream of the throttle valve, and the fuel in the fuel tank 117 is supplied to these injectors 23 by a fuel pump. In this case, each injector 23 is connected to a delivery pipe 24 laid horizontally in the vehicle width direction on the upper side, and fuel is distributed from the delivery pipe 24 connected to the fuel pump. Each injector 23 injects fuel into the intake passage in the throttle body 20 at a predetermined timing under the control of the control system, whereby a mixture of a predetermined air-fuel ratio is supplied to the cylinders 13 of the # 1 and # 2 cylinders.

  Here, as shown in FIG. 4 or FIG. 6, the air cleaner 26 is provided at a predetermined interval below the magneto chamber 25 provided at the lower part of the engine 11, that is, on the left side of the crankcase 12 and on the left side of the oil pan 16. (Abbreviated by an alternate long and short dash line in FIG. 4 etc.) are arranged adjacent to each other. The air cleaner 26 is provided with an air filter in a box-shaped casing, and the air taken in the casing is cleaned by the air filter. An air outlet for purified air is opened in the front portion of the casing of the air cleaner 26, and an air supply pipe 27 is connected to the outlet. The air supply pipe 27 extends from the air cleaner 26, wraps around the front of the crankcase 12 as shown in FIG. 4, then curves upward, and further passes through the left side of the cylinder 13 and is air-cooled in this example. Connected to the intercooler 28.

  The intercooler 28 cools the air supplied from the air supply pipe 27, and the cooled air is supplied to the throttle bodies 20 of the # 1 and # 2 cylinders via the surge tank 29. . In this example, a supercharger 30 (turbocharger) is provided in the middle of the air supply pipe 27, that is, on the front side of the engine 11, and compresses the sucked air. Specific configurations of the intercooler 28 and the supercharger 30 will be described later.

  Next, in the exhaust system, an exhaust port 31 (exhaust port; see FIG. 4) is opened on the front side of the cylinder head 14 for both the # 1 and # 2 cylinders, and an exhaust pipe 32 (exhaust pipe) is connected to the exhaust port 31. The The exhaust pipe 32 of each cylinder temporarily extends downward from the exhaust port 31, merges and integrates at the front side of the cylinder 13, and then goes around the lower right part of the crankcase 12 and further extends rearward. A muffler (silencer) is attached to the rear end of the exhaust pipe 32. In this example, the drive unit side of the supercharger 30, that is, a turbine is arranged in the middle of the exhaust pipe 32, and a compressor that is rotationally driven by this turbine is arranged in the middle of the air supply pipe 27. Thus, in the present embodiment, a turbocharger that uses the exhaust flow of the engine 11 to pressurize the air sucked from the air cleaner 26 and supply the air to the intercooler 28 is employed.

  Although not shown in detail in the cooling system, a water jacket is formed around the cylinder block including the cylinder 13 so that the cooling water circulates, and the cooling water supplied to the water jacket is formed. It is equipped with a radiator 33 for cooling. The radiator 33 is supported at an appropriate position of the front of the engine unit 10 by using the body frame 101 or the like.

  Furthermore, a lubricating system for supplying lubricating oil to the movable parts of the engine unit 10 and lubricating them is configured. Although not shown in detail in the same manner, this lubrication system includes a valve operating device configured in the crankshaft and the cylinder head 14, a cam chain, a transmission, and the like that connect them. In this embodiment, a normal oil pump is used for the lubrication system, and the oil sucked from the oil pan 16 by this oil pump is fed to the lubrication system.

  Now, the engine unit 10 of the present invention, particularly around the intake system, will be described. As shown in FIG. 7, the throttle body 20 and the surge tank 29 are arranged behind the cylinder head 14, and the intercooler 28 is connected to the cylinder head 14. In addition, it is positioned behind the throttle body 20 and adjacent to the surge tank 29. The supercharger 30 is provided in front of the intercooler 28.

  FIG. 8 is a left side view of the engine 11 including the periphery of the intake system, FIG. 9 is a right side view thereof, and FIG. 10 is a top view thereof. In this example, the intercooler 28 has a thin box shape that is inclined so that the front side is appropriately lowered, and the longitudinal direction of the intercooler 28 extends in the longitudinal direction of the vehicle body. An air supply pipe 27 is connected to the box-shaped front end face of the intercooler 28 from the front. Referring to FIG. 1, the intercooler 28 is disposed below the seat 108, and at least a part (near the rear portion) is positioned rearward with respect to the front end of the seat 108 in a plan view of the vehicle body.

  The box-shaped upper surface of the intercooler 28 is defined as a wind receiving surface 28A, and the lower surface thereof is defined as a heat radiating surface 28B. By inclining the intercooler 28 and directing the air receiving surface 28A diagonally forward, it is possible to reduce the bending on the path from the introduction of the cooling air to the discharge, compared to the case where it is horizontally arranged without inclining, so that the intercooler 28 can be introduced from the front of the vehicle body. It is easy to receive the traveling wind, and the exhaust hot air that has passed through the intercooler 28 is easily flowed backward. Furthermore, the heat radiating surface 28B side of the lower surface of the intercooler 28 is disposed so as to face the space above the rear wheel 111 as shown in FIGS.

  FIG. 11 schematically shows air flow paths in the intake system. As described above, the air supply pipe 27 connected to the front end face of the intercooler 28 communicates with the interior of the intercooler 28, that is, the air inlet 28 a is disposed on the front side of the intercooler 28. A partition plate 34 is provided in the center of the interior of the intercooler 28 along the longitudinal direction. In this case, the partition plate 34 does not reach the rear end of the intercooler 28, so that the air flow path inside the intercooler 28 has a substantially U-shape. Become. In this example, a flow path is formed which flows from the front to the rear on the left side of the intercooler 28 and flows back from the rear end to the front from the rear on the right side of the intercooler 28. Further, an outlet pipe 35 is connected to the upper surface of the box-shaped front end portion of the intercooler 28, as shown in FIG. 12 and the like, that is, an air outlet 28b is arranged on the front side of the intercooler 28 in this case as well. Thus, in the intercooler 28 of this example, the air inlet 28a and the outlet 28b are set on one side.

  The surge tank 29 is arranged behind the cylinder head 14 as described above, but is connected to the outlet pipe 35 on the lower surface on the rear end side (see FIGS. 8 and 9). Further, in a plan view of FIG. 10 and the like, it is widened toward the throttle bodies 20 of the # 1 and # 2 cylinders to form a substantially triangular shape, and is connected to the throttle bodies 20 at the front end face. In this case, as shown in FIG. 8 or FIG. 9 or the like, a part (near the front) of the intercooler 28 is disposed so as to overlap the surge tank 29 in the vertical direction.

  Next, the main actions and the like in the present invention will be described. First, by disposing the intercooler 28 adjacent to the surge tank 29, the air path between them can be shortened and the throttle response is improved. Moreover, since piping can be reduced, it leads to weight reduction and a reduction in the number of parts. Further, by arranging the intercooler 28 behind the engine 11, the layout on the front side of the engine 11 where the radiator 33, the exhaust pipe 32, and the supercharger 30 (mainly in the case of a turbo) are arranged can be facilitated. .

  Further, by disposing the supercharger 30 in front of the intercooler 28, the supercharger 30 is disposed in the vicinity of the engine 11, and the intake system parts can be concentrated, so that piping can be shortened and simplified. In addition, the operability of the vehicle is improved because the component weight is concentrated in the center of the vehicle body. In this example, a turbocharger 30 that is a so-called turbo that compresses intake air using an exhaust flow needs to be disposed in front of the engine 11 adjacent to an exhaust pipe 32 extending from the front side of the cylinder 13. By arranging the cooler 28 at the rear, the layout in front of the engine 11 is facilitated.

  Further, in the intercooler 28, the air inlet 28a and the outlet 28b are positioned on one side (the front half of the vehicle body), and the internal air flow path has a substantially U shape. Thus, by adopting a configuration in which the air flow path is folded back inside the intercooler 28, the intercooler 28 can be set wider than the conventional U-shaped pipe occupied as compared with the case where the folded U-shaped pipe is provided. As a result, the limited space or space below the seat 108 can be utilized to the maximum, so that the cooling efficiency of the intake air is improved and the number of parts can be reduced.

  Further, the intercooler 28 is located below the seat 108 and at least a part thereof is located behind the front end of the seat 108 in a plan view of the vehicle body. As a result, the intercooler 28 that generates high-temperature exhaust hot air is disposed below (directly below or behind) the seat 108, so that the exhaust hot air is less likely to hit the passenger as compared with the case where it is provided in front of the seat 108. Comfort is improved.

Further, the intercooler 28 is arranged in such a manner that the heat radiating surface 28B on one side faces the space above the rear wheel 111 (and below the seat 108). As a result, the intercooler 28 is disposed so as to be exposed in the space below the seat 108 at the rear of the vehicle body, so that the heat radiating surface 28B can easily cool the air by touching the outside air, and the exhausted air can be more easily removed. Superior to sex.
In addition, since a part of the intercooler 28 overlaps the surge tank 29 in the vertical direction, the air supply pipe 27 from the supercharger 30 can be further shortened by collecting and arranging the components. In this case, the weight of the component parts is concentrated at the center of the vehicle body, so that the operability of the vehicle is improved.

  Further, the intercooler 28 is arranged with its longitudinal direction extending in the longitudinal direction of the vehicle body. Thus, by arranging the intercooler 28 so that the air flow path is substantially straight with respect to the air supply pipe 27 extending in the front-rear direction from the supercharger 30 positioned in front, a resistance portion against the flow of air Reduced and better throttle response. In addition, in the motorcycle 100 or the like that is elongated in the front-rear direction, the passage path length can be secured by turning back the minimum path by extending the intercooler 28 forward and backward, and the cooling efficiency is excellent.

In the above case, the supercharger 30 is located in the lower front part of the engine 11 (crankcase 12), and the air cleaner 26 is located in the lower side part of the engine 11 (crankcase 12). Thus, piping can be shortened by making it close to supercharger 30.
The intercooler 28 may be water-cooled.
In addition, the motorcycle 100 may have a duct that guides traveling wind from the front of the vehicle body to the front side surface of the intercooler 28.
In the case of a vehicle with a cover, an air exhaust port is provided in the seat cover at the rear of the vehicle body (below the seat 108) and passes through the cover to connect the rear side surface of the intercooler 28 and the air exhaust port. Good.
Further, the rear side surface of the intercooler 28 may be directly exposed to the outside of the vehicle body.
Further, the air outlet of the seat cover may be located at the rear end of the vehicle body, and may be provided toward the upper side of the vehicle body if it is behind the passenger seat.

As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention.
Although the example of the water-cooled parallel two-cylinder engine has been described in the above embodiment, the number of cylinders and the cooling method of the engine 11 can be selected as appropriate.

10 Engine Unit, 11 Engine, 12 Crankcase, 13 Cylinder, 14 Cylinder Head, 16 Oil Pan, 17 Transmission Case, 18 Drive Sprocket, 19 Inlet, 20 Throttle Body, 21 Intake Pipe, 22 Valve Drive Mechanism, 23 Injector, 24 Delivery pipe, 25 Magnet chamber, 26 Air cleaner, 27 Air supply pipe, 28 Intercooler, 29 Surge tank, 30 Supercharger, 31 Exhaust port, 32 Exhaust pipe, 33 Radiator, 34 Partition plate, 35 Outlet pipe, 100 Motorcycle.

Claims (5)

An engine having an exhaust port to which an exhaust pipe is connected on the front side of the cylinder head and an intake port to which a throttle body is connected on the rear side thereof, and a combustion air disposed on the front side of the engine and compresses the intake combustion air In a motorcycle including a supercharger, an intercooler for cooling the air compressed by the supercharger, and a surge tank for flowing air from the intercooler to a throttle body,
The throttle body and the surge tank are disposed behind the cylinder head, and the intercooler is disposed behind the cylinder head and the throttle body and adjacent to the surge tank,
The supercharger is provided in front of the intercooler ;
The intercooler is a motorcycle, wherein Rukoto arranged in a manner facing the space of the heat radiation surface side rear wheel upwards.   2. The motorcycle according to claim 1, wherein the intercooler has an air inlet and an outlet on one side, and an internal air flow path has a substantially U shape.   The motorcycle according to claim 1 or 2, wherein the intercooler is disposed below the seating seat, and at least a part of the intercooler is located rearward with respect to the front end of the seating seat in a plan view of the vehicle body. The motorcycle according to any one of claims 1 to 3 , wherein a part of the intercooler overlaps the surge tank in a vertical direction. The motorcycle according to any one of claims 1 to 4 , wherein the intercooler is disposed such that a longitudinal direction thereof extends in a longitudinal direction of the vehicle body.

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