JP2018173008A - Engine and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit an influence of heat on a supercharger and concurrently protect the supercharger.SOLUTION: An engine (2) of the invention includes: a supercharger (3) which uses exhaust air as a driving source; an upper radiator (40) which cools cooling water; and a radiator fan (45) which causes wind to pass through the upper radiator. The supercharger is disposed in front of a cylinder block (21). The upper radiator is disposed above the supercharger. The radiator fan is disposed on a back surface of the radiator. The supercharger is provided with a partition plate (5) which partitions the supercharger from the radiator fan.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an engine and a vehicle.

  Some motorcycles equipped with a supercharger use engine exhaust as a drive source for the supercharger (see, for example, Patent Document 1). In the motorcycle described in Patent Document 1, an exhaust pipe (exhaust manifold) is attached to an exhaust port formed for each cylinder in the cylinder head. The exhaust pipe extends downward from the front surface of the cylinder head, and a supercharger (turbocharger) is attached to the lower end of the exhaust pipe. A supercharger is arrange | positioned ahead of the oil pan provided in the lower end of an engine, and the circumference | surroundings of a supercharger are covered with an under cowl. Further, a radiator for cooling the cooling water is provided in front of the exhaust pipe, and a radiator fan is provided between the exhaust pipe and the radiator.

Japanese Patent Laying-Open No. 2015-77869

  By the way, it is preferable that the supercharger using exhaust gas as a drive source is arranged close to the cylinder head from the viewpoint of ensuring the layout and the supercharging pressure. In addition, with the recent downsizing of motorcycles and shortening of the wheel base, the radiator also tends to be arranged closer to the cylinder head.

  However, when the supercharger approaches the cylinder head, the radiator and the radiator fan approach the supercharger that is a heat source. For this reason, there exists a problem that the radiator fan and its peripheral components which are comparatively weak to heat become easy to receive the influence of the heat of a supercharger.

  In addition, when the supercharger is brought close to the cylinder head, the arrangement location of the supercharger may be increased, and as in Patent Document 1, it is difficult to protect the supercharger with an under cowl. is assumed.

  This invention is made | formed in view of the point which concerns, and it aims at providing the engine and vehicle which can protect a supercharger, suppressing the influence of the heat | fever of a supercharger.

  An engine according to an aspect of the present invention is an engine including a supercharger that uses exhaust as a drive source, a radiator that cools cooling water, and a radiator fan that passes air through the radiator. Is disposed in front of the cylinder, the radiator is disposed above the supercharger, the radiator fan is disposed on the rear surface of the radiator, and the supercharger includes the supercharger and the radiator. A partition plate for partitioning the fan is provided.

  ADVANTAGE OF THE INVENTION According to this invention, a supercharger can be protected, suppressing the influence of the heat of a supercharger.

1 is a right side view showing an engine and its peripheral configuration of a motorcycle according to the present embodiment. Fig. 2 is a front view of an engine in which a body frame is omitted from the motorcycle shown in Fig. 1. FIG. 3 is a front view of an engine in which a radiator is omitted from the engine shown in FIG. 2. It is the 3rd page figure and sectional drawing of the partition plate which concern on this Embodiment. FIG. 2 is a partially enlarged view around a supercharger of the engine shown in FIG. 1.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following, an example in which the present invention is applied to a motorcycle (vehicle) will be described, but the application target is not limited to this and can be changed. For example, the present invention may be applied to a buggy type automatic tricycle, an automatic four-wheel vehicle, or the like. Regarding the direction, the front of the vehicle is indicated by an arrow FR, the rear of the vehicle is indicated by an arrow RE, the left side of the vehicle is indicated by an arrow L, and the right side of the vehicle is indicated by an arrow R. In the following drawings, a part of the configuration is omitted for convenience of explanation.

  A schematic configuration of the motorcycle according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a right side view showing an engine and its peripheral configuration of a motorcycle according to the present embodiment. FIG. 2 is a front view of the engine in which the body frame is omitted from the motorcycle shown in FIG. FIG. 3 is a front view of the engine in which the radiator is omitted from the engine shown in FIG.

  As shown in FIGS. 1 to 3, the motorcycle 1 is configured by suspending an engine 2 on a vehicle body frame 10 on which components such as a power unit and an electrical system are mounted. The engine 2 is composed of, for example, a parallel two-cylinder water-cooled engine, and includes a supercharger 3 that uses exhaust as a drive source. The engine 2 is configured by housing various shafts such as a crankshaft 20 d extending in the vehicle width direction in the crankcase 20.

  The crankcase 20 is divided into upper and lower parts, and has an upper case 20a and a lower case 20b. By combining the upper case 20a and the lower case 20b, a space for accommodating the various shafts is formed. A cylinder block 21, a cylinder head 22, and a cylinder head cover 23 are provided in the upper part of the crankcase 20 in order from the lower side. An oil pan 24 is provided at the lower part of the crankcase 20. In the present embodiment, the crankcase 20, the cylinder block 21, the cylinder head 22, the cylinder head cover 23, and the oil pan 24 are collectively referred to as an engine case. In addition, the crankcase 20 may be comprised not only in the vertical division but in the horizontal division.

  Openings are respectively formed on the left and right sides of the crankcase 20. A magnet cover 25 that covers the magnet (not shown) is provided in the left opening, and a clutch cover 26 that covers the clutch (not shown) is provided in the right opening. An oil cooler 27 that cools oil in the engine 2 and an oil filter 28 that filters dirty oil are attached to the front of the lower case 20b. The oil cooler 27 and the oil filter 28 are arranged side by side, and the oil filter 28 is located on the left side with respect to the oil cooler 27. Further, a water pump 29 described later is provided in front of the clutch cover 26.

  The cylinder block 21 is disposed such that the axis thereof is inclined forward with respect to the vertical direction, and a piston (not shown) is accommodated therein so as to be able to reciprocate up and down. The cylinder head 22 accommodates a valve operating mechanism (both not shown) capable of opening and closing the intake port and the exhaust port. Two exhaust ports (not shown) communicating with the exhaust port of the combustion chamber are formed on the front surface of the cylinder head 22 side by side. Similarly, two intake ports (not shown) communicating with the intake port of the combustion chamber are formed on the rear surface of the cylinder head 22.

  The vehicle body frame 10 is a diamond frame formed by welding metal pipes, for example, and is configured to obtain rigidity as a whole vehicle body by suspending the engine 2 as described above. The vehicle body frame 10 includes a main frame 12 that extends rearward and downward from the upper end side of the head pipe 11, and a frame arm 13 that extends rearward and downward from the lower end side of the head pipe 11.

  The main frame 12 extends to the rear part of the crankcase 20. The frame arm 13 extends to the lower front side of the cylinder head 22. At the lower end of the frame arm 13, the front side of the cylinder head 22 is suspended.

  Two cross frames 14 and 15 are connected to the main frame 12 and the frame arm 13. The cross frame 14 extends downward from the main frame 12 and is connected to the lower end of the frame arm 13. The cross frame 15 extends rearward from the frame arm 13, and is connected to the approximate center of the main frame 12 in the extending direction. In the side view shown in FIG. 1, the cross frames 14 and 15 cross each other.

  A pivot frame 16 that suspends the rear portion of the crankcase 20 is connected to the rear end of the main frame 12. The pivot frame 16 extends downward, and a lower end serves as a swing shaft of a swing arm (not shown). A seat rail 17 extending rearward is connected to substantially the center of the main frame 12 in the extending direction, that is, in the vicinity of the connecting portion between the main frame 12 and the cross frame 15. At the connecting portion between the main frame 12 and the seat rail 17, the rear side of the cylinder head 22 is suspended.

  Further, a backstay 18 extending rearward and upward is connected to a connecting portion between the main frame 12 and the pivot frame 16. Moreover, the rear side of the upper case 20a is suspended in the connection portion. A fuel tank (not shown) is provided above the main frame 12, and a seat (not shown) is provided along the seat rail 17 behind the fuel tank.

  Further, as described above, the engine 2 is a water-cooled engine, and the engine 2 cools the water pump 29 that sends cooling water to each part in the engine 2 and the cooling water heated by the heat of the engine 2. A radiator unit 4 as a heat exchanger is provided. The water pump 29 is provided in front of the clutch cover 26 on the right side surface of the crankcase 20.

  The water pump 29 is configured by providing an impeller (not shown) at the shaft end (right end) of the balancer shaft 20c and attaching a water pump cover 29a so as to cover the impeller. The impeller is driven by the rotation of the balancer shaft 20c. The balancer shaft 20c is provided in front of the crankshaft 20d so as to extend in the vehicle width direction on the split surface of the upper case 20a and the lower case 20b.

  The radiator unit 4 is provided in front of the engine case so as to receive the traveling wind of the vehicle, and is configured by vertically arranging an upper radiator 40 and a lower radiator 41 that are rectangular in front view. The upper radiator 40 is disposed in front of the cylinder head 22 and the cylinder head cover 23, and is slightly inclined forward with respect to the vertical direction so as to be parallel to the axis of the cylinder block 21. The lower radiator 41 is arranged in front of the crankcase 20 so as to sandwich the supercharger 3 with the crankcase 20. That is, the lower radiator 41 is disposed in front of the supercharger 3.

  The upper radiator 40 and the lower radiator 41 are configured by disposing a pair of tanks 40a and 41a facing each other in the vehicle width direction and connecting radiator cores 40b and 41b between the pair of tanks 40a and 41a. The radiator cores 40b and 41b are configured by alternately laminating a plurality of flat water tubes and cooling fins (both not shown). In the upper radiator 40 and the lower radiator 41, the left tanks 40 a and 41 a are connected by a pipe 42, and the right tanks 40 a and 41 a are connected by a pipe 43. A radiator cap 44 is provided at the upper end of the tank 40 a on the right side of the upper radiator 40.

  On the back surface of the upper radiator 40, a radiator fan 45 for allowing the upper radiator 40 to pass (draw) wind is attached. The radiator fan 45 is fixed to the upper radiator 40 by three fan stays 46. The radiator fan 45 is slightly offset to the right side of the center of the radiator core 40b in the vehicle width direction, and is disposed on the travel line of the vehicle (on the extension line of the front wheels).

  Each of the fan stays 46 extends radially outward from the center of the radiator fan 45. One (downward) of the three fan stays 46 is positioned below the radiator fan 45 and is close to the supercharger 3. The radiator fan 45 and the fan stay 46 are made of a synthetic resin such as polypropylene. In addition, the material of the radiator fan 45 and the fan stay 46 is not limited to this, It can change suitably.

  A turbocharger 3 is disposed between the radiator unit 4 and the engine case. The supercharger 3 is provided in front of the upper case 20 a, the cylinder block 21, and the cylinder head 22. The supercharger 3 is configured by a so-called turbocharger that compresses intake air using the exhaust of the engine 2. The supercharger 3 has a housing body in which an exhaust manifold (hereinafter referred to as a manifold portion 3a) and a turbine housing (hereinafter referred to as a housing portion 3b) described later are integrally formed by casting. The supercharger 3 is attached to the exhaust port of the cylinder head 22. The housing main body (housing portion 3b) is disposed on the travel line of the vehicle.

  The manifold portion 3a is configured by connecting (collecting) pipes extending downward from a pair of left and right exhaust ports formed on the front surface of the cylinder head 22 in a V shape when viewed from the front. At the upper end of each pipe of the manifold portion 3a, two flange portions 3c are formed corresponding to the exhaust ports. Two insertion holes (both not shown) of the bolts are formed in the flange portion 3c so as to face each other across the center of the pipe.

  The housing part 3b is formed in a cylindrical shape with the vehicle width (left and right) direction as an axial direction, and accommodates a turbine and a turbo shaft (both not shown). The housing portion 3b is positioned in front of the cylinder block 21 and above the axial center of the crankshaft 20d (or balancer shaft 20c). The upper part of the housing part 3b is connected to the lower end of the manifold part 3a (the part where the pair of pipes gather).

  A bearing housing 30 is provided on the left end side of the housing portion 3b to accommodate a turbo shaft bearing (both not shown). A compressor housing 31 that houses a compressor (not shown) is provided on the left side of the bearing housing 30 (on the left side of the housing portion 3b).

  Further, the crankcase 20 and the supercharger 3 include an inlet pipe 30a for supplying oil from the crankcase 20 to the supercharger 3, and an outlet pipe 30b for returning the oil lubricated in the supercharger 3 to the crankcase 20. Is connected. An oil passage between the crankcase 20 and the supercharger 3 is formed by the inlet pipe 30a and the outlet pipe 30b.

  The turboshaft extends in the vehicle width direction between the housing portion 3b and the compressor housing 31. A turbine is fixed to one end (right end) of the turbo shaft, and a compressor is fixed to the other end (left end) of the turbo shaft. Thus, the turbine and the compressor are configured to be integrally rotatable about the turbo shaft.

  A waste gate valve 32 is provided below the compressor housing 31. The waste gate valve 32 serves to adjust the amount of exhaust flowing into the turbine (housing 3b), and the operating shaft 32a extends left and right below the housing 3b. For example, when the supercharging pressure suddenly increases, the waste gate valve 32 is operated so that the amount of exhaust flowing into the turbine is reduced.

  Connected to the left end of the compressor housing 31 is a compressor pipe 33 that introduces intake air that has passed through an air cleaner (not shown) into the compressor housing 31. Further, an intake pipe 34 that introduces intake air compressed in the compressor housing 31 into the engine 2 is connected to the upper end of the compressor housing 31.

  An exhaust pipe 35 (muffler) is connected to the right end of the housing portion 3b. A flange portion (not shown) is formed at the upstream end of the exhaust pipe 35. The flange portion is sandwiched between the end surface of the housing portion 3b and the substantially circular flange 36, and a plurality of bolts 37 (may be nuts) are screwed into the housing portion 3b from the flange 36 side (only three locations in FIG. 1). The exhaust pipe 35 is fixed to the housing part 3b. The flange 36 constitutes a connecting portion that connects the exhaust pipe 35 to the supercharger 3.

  The exhaust pipe 35 protrudes rightward from the housing portion 3b and then bends downward. Further, the exhaust pipe 35 is bent rearward on the right side of the oil pan 24 and extends rearward along the right side surface of the oil pan 24. A chamber (not shown) is connected to the rear end of the exhaust pipe 35 behind the oil pan 24.

  In the engine 2 having the supercharger 3 configured as described above, exhaust of the engine 2 is introduced into the housing portion 3b through the manifold portion 3a in response to the occupant's throttle operation, while outside air ( Intake air) is introduced into the compressor housing 31 through the compressor pipe 33.

  In the housing portion 3b, the turbine is rotated at a high speed by the flow of exhaust gas, and the exhaust gas is discharged outside through the exhaust pipe 35 and the chamber. On the other hand, in the compressor housing 31, the intake air is compressed by rotating the compressor according to the rotation of the turbine. The compressed intake air is introduced into the engine 2 through the intake pipe 34.

  In this way, by compressing air with the supercharger 3, an air-fuel mixture exceeding the total displacement of the engine 2 can be sent into the engine 2. As a result, more air-fuel mixture can be burned and the output of the engine 2 can be increased.

  By the way, when the supercharger is attached to the engine of the motorcycle, it is preferable to bring the supercharger as close to the cylinder head as possible from the viewpoint of layout. For this reason, it is conceivable to integrally mold the exhaust manifold and the turbine housing. Thereby, a degree of freedom can be obtained in the shape of the supercharger, and the supercharger can be brought close to the cylinder head to make the entire vehicle compact. Furthermore, the distance between the supercharger and the combustion chamber can be shortened, and the supercharging pressure can be increased.

  In a motorcycle, a radiator may be disposed as a heat exchanger on the front surface of the cylinder head. In recent motorcycles, it has become popular to obtain a light ride comfort by reducing the wheel base of the vehicle. Therefore, it is preferable that the radiator is also arranged close to the cylinder head.

  However, when the supercharger and the radiator approach the cylinder head, the supercharger and the radiator also approach each other. In addition, a radiator fan may be provided between the radiator and the turbocharger, and the fan fan and the fan stay that fixes the radiator fan are made of synthetic resin from the viewpoint of freedom of shape and weight. There are many. For this reason, the radiator fan (fan motor) and its peripheral parts (fan stays, etc.) that are relatively weak against heat may be exposed to high temperatures due to the heat of the supercharger that is a heat source.

  Therefore, the present inventor has conceived to protect the supercharger while suppressing the influence of the heat of the supercharger on the peripheral configuration of the supercharger. Specifically, in the present embodiment, the supercharger 3 is disposed in front of the cylinder block 21, the upper radiator 40 is disposed above the supercharger 3, and the radiator fan 45 is disposed on the back surface of the upper radiator 40. And the partition plate 5 which partitions off the said supercharger 3 and the radiator fan 45 was attached to the supercharger 3, and it was set as the structure which covers the upper direction and the front of the supercharger 3 with the partition plate 5. FIG.

  Thereby, the heat of the supercharger 3 can be shielded by the partition plate 5, and the heat damage to the radiator fan 45 adjacent to the supercharger 3 and its peripheral configuration can be suppressed. In addition, since the front of the supercharger 3 is covered with the partition plate 5, it is possible to protect the supercharger 3 from pebbles, water, and the like that are wound up from the front wheels during traveling.

  Further, by adopting the supercharger 3 in which the manifold portion 3a and the housing portion 3b are integrally molded, the supercharger 3 can be made compact. Therefore, the supercharger 3 and the upper radiator 40 can be disposed close to the cylinder head 22 and the wheel base can be shortened. Thus, according to this Embodiment, shortening of a wheelbase and the heat insulation and protection of the supercharger 3 can be made compatible. That is, even when a component having low heat resistance (for example, the radiator fan 45) approaches the supercharger 3, heat damage can be suppressed, and the degree of freedom of arrangement of peripheral components is improved. Further, the supercharger 3 can be protected by the partition plate 5 without being covered with the under cowl.

  Next, referring to FIG. 3 to FIG. 5, the heat shield structure for the engine according to the present embodiment will be described. In FIG. 3, for convenience of explanation, the partition plate is indicated by a broken line. FIG. 4 is a trihedral view and a cross-sectional view of the partition plate according to the present embodiment. 4A is a right side view, FIG. 4B is a front view, and FIG. 4C is a left side view. 4D is a cross-sectional view taken along line AA in FIG. 4B. FIG. 5 is a partially enlarged view around the supercharger of the engine shown in FIG.

  As shown in FIGS. 3 to 5, the partition plate 5 is formed by welding or bending a metal plate, and is formed so as to cover the housing (manifold portion 3 a and housing portion 3 b) of the supercharger 3. . Specifically, the partition plate 5 extends downward from a mounting portion (flange portion 3c) of the supercharger 3, and covers a front portion 50 (see FIGS. 3 and 4B) that covers the upper and front sides of the supercharger 3. And a left side 51 (see FIG. 4C) and a right side 52 (see FIGS. 4A and 5) extending rearward from both ends of the front part 50. The partition plate 5 has a substantially U shape with the rear opened in the cross-sectional view shown in FIG. 4D.

  The front portion 50 extends downward from the flange portion 3c and has a curved shape so as to follow the outer surface shapes of the manifold portion 3a and the housing portion 3b in a side view. Further, in the front view, the left and right widths of the upper half portion of the front portion 50 that covers the manifold portion 3a become smaller toward the lower side. On the other hand, the lower half part of the front part 50 covering the housing part 3b extends to the lower end of the housing part 3b with a substantially constant left-right width. The left-right width of the lower half portion of the front portion 50 is set to be approximately the same as the width of the housing portion 3b.

  The left side surface portion 51 is continuous with the left end of the front portion 50 and extends rearward with a predetermined front-rear width. A part of the left side surface of the manifold portion 3 a and the housing portion 3 b is covered with the left side surface portion 51.

  The right side surface portion 52 continues to the right end of the front portion 50 and extends rearward with a predetermined front-rear width. Part of the right side surface of the manifold portion 3 a and the housing portion 3 b is covered with the left side surface portion 51. Further, the right side surface portion 52 is formed with an arc portion 53 extending in an arc shape from the substantially vertical center to the rear. The arc portion 53 is formed in an arc shape along the outer surface shape of the housing portion 3 b and the flange 36 in a side view, and constitutes a fixing portion for fixing the partition plate 5 to the supercharger 3. Two through holes 54 penetrating in the thickness direction are formed at the base end and the rear end of the arc portion 53. The two through holes 54 are formed at positions corresponding to the fastening locations of the flange 36.

  The partition plate 5 thus configured has the left side surface portion 51 along the side surface of the flange 36, the bolt 37 for fixing the exhaust pipe 35 is inserted into the through hole 54, and is fastened together with the flange 36 to the housing portion 3b. Is fixed. That is, since the partition plate 5 is attached using the existing configuration, the configuration can be simplified and the attachment workability can be improved.

  As shown in FIG. 5, the front surface of the supercharger 3 (particularly the manifold portion 3a and the housing portion 3b) is covered by the front portion 50, so that the heat in the vicinity of the supercharger 3 is cut off, and the upper upper radiator 40 and It is difficult for the heat of the supercharger 3 to be transmitted to the radiator fan 45 and the fan stay 46. Further, it is possible to prevent the wind after passing through the upper radiator 40 from being further warmed by the heat of the supercharger 3.

  In addition, since the manifold portion 3a and the housing portion 3b, which are relatively high in temperature, are intensively covered, the partition plate 5 can be made less susceptible to the increase in weight and vibration without making the partition plate 5 larger than necessary. . Further, since the upper portion and the front portion of the supercharger 3 are covered by the front portion 50, the heat between the supercharger 3 and the front portion 50 does not go upward, and the heat is further hardly transmitted to the radiator fan 45. be able to. A slight gap is formed between the manifold portion 3a and the partition plate 5 (front portion 50). Due to the gap, heat of the supercharger 3 can be released at a location away from the radiator fan 45.

  Further, in front of the supercharger 3, the supercharger 3 and the lower radiator 41 are provided at a position where they overlap each other in front view, and the lower end of the lower radiator 41 is located below the supercharger 3. Thereby, the lower radiator 41 can be utilized as a wall for protecting the front lower side of the supercharger 3. Therefore, it becomes possible to make it a simple shape without enlarging the partition plate 5 more than necessary, and simplification of the configuration can be realized.

  As described above, in the present embodiment, the supercharger 3 in which the manifold portion 3a and the housing portion 3b are integrally formed is adopted, and the front surface of the supercharger 3 is covered according to the outer surface shape of the supercharger 3. Thus, the partition plate 5 is provided. Thereby, it is possible to make it difficult to transfer the heat of the supercharger 3 to the upper radiator 40, the radiator fan 45, and the fan stay 46 while the supercharger 3 and the upper radiator 40 are brought close to the cylinder head 22. . In particular, during traveling, the wind after passing through the upper radiator 40 and the traveling wind always hit the partition plate 5, so that the partition plate 5 itself can be cooled. Therefore, a further heat shielding effect can be obtained. Further, the partition plate 5 can protect the supercharger 3 from flying stones, water, and the like. Furthermore, the protection effect from flying stones, water, etc. is enhanced by providing the supercharger 3 at a relatively high position.

  In the above embodiment, the motorcycle 1 has been described as an example of the vehicle, but the present invention is not limited to this configuration. For example, other types of vehicles such as an automobile and an automobile tricycle may be used.

  In the above embodiment, the parallel two-cylinder engine 2 has been described as an example. However, the present invention is not limited to this configuration. For example, the engine 2 may be composed of a single cylinder or an engine having three or more cylinders, and the arrangement of the cylinders is not limited to being arranged in parallel and can be appropriately changed.

  Moreover, in the said embodiment, although the vehicle body frame 10 was comprised with the diamond frame, it is not limited to this structure. The body frame 10 may be a twin spar type frame, for example.

  Moreover, in the said embodiment, although the partition plate 5 was set as the structure which mainly covers the manifold part 3a and the housing part 3b, it is not limited to this structure. It is good also as a structure which changes the shape of the partition plate 5 suitably, and the partition plate 5 covers the supercharger 3 over a wide range, such as the bearing housing 30 and its periphery.

  Moreover, in the said embodiment, although it was set as the structure which fixes the partition plate 5 in two places of the right side surface part 52, it is not limited to this structure. There may be three or more places where the partition plate 5 is fixed. Further, the partition plate 5 may be fixed using the left side surface portion 51.

  Moreover, in the said embodiment, although it was set as the structure which the partition plate 5 only covered the supercharger 3, it is comprised so that the cooling performance of the supercharger 3 may be improved by providing a radiation fin in the front part 50, for example. Also good.

  Moreover, although the lower radiator 41 was mentioned as an example and demonstrated in the said embodiment as a heat exchanger arrange | positioned under the upper radiator 40, it is not limited to this structure. Instead of the lower radiator 41, an air-cooled oil cooler may be provided.

  Moreover, although this Embodiment and the modified example were demonstrated, what combined the said embodiment and modified example entirely or partially as another embodiment of this invention may be sufficient.

  The embodiments of the present invention are not limited to the above-described embodiments, and various changes, substitutions, and modifications may be made without departing from the spirit of the technical idea of the present invention. Furthermore, if the technical idea of the present invention can be realized in another way by technological advancement or other derived technology, the method may be used. Accordingly, the claims cover all embodiments that can be included within the scope of the technical idea of the present invention.

  As described above, the present invention has an effect that the supercharger can be protected while suppressing the influence of the heat of the supercharger, and is particularly useful for an engine of a motorcycle.

1 Motorcycle (vehicle)
2 Engine 20 Crankcase 20d Crankshaft 21 Cylinder block (cylinder)
22 Cylinder head 29 Cam chain chamber 3 Supercharger 3a Manifold (exhaust manifold)
3b Housing part (turbine housing)
3c Flange part (mounting part)
36 Flange (connection part)
40 Upper radiator (Radiator)
41 Lower radiator (heat exchanger)
45 Radiator fan 5 Partition plate 50 Front part 51 Left side part (side part)
52 Right side (side)

Claims (7)

An engine comprising a supercharger that uses exhaust as a drive source, a radiator that cools cooling water, and a radiator fan that passes air through the radiator,
The supercharger is arranged in front of the cylinder;
The radiator is disposed above the supercharger;
The radiator fan is disposed on a back surface of the radiator,
The engine, wherein the supercharger is provided with a partition plate that partitions the supercharger and the radiator fan.   The engine according to claim 1, wherein the partition plate is formed so as to cover an exhaust manifold that connects an exhaust port of a cylinder head and the turbine housing, and the turbine housing. The partition plate extends downward from a mounting portion of the exhaust manifold with respect to the exhaust port,
A front portion covering the upper and front of the supercharger;
The engine according to claim 2, comprising: side portions extending rearward from both ends of the front portion.   4. The turbocharger according to claim 1, wherein the turbocharger is formed by integrally molding the exhaust manifold and the turbine housing, and is disposed above the axial center of the crankshaft. The engine described in Crab.   The engine according to any one of claims 1 to 4, wherein the partition plate is fastened together with a connecting portion that connects an exhaust pipe to the supercharger. A heat exchanger disposed below the radiator;
The heat exchanger is disposed in front of the supercharger;
The engine according to any one of claims 1 to 5, wherein the supercharger and the heat exchanger are provided at a position overlapping each other when viewed from the front.   A vehicle comprising the engine according to any one of claims 1 to 6.

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