JP5788821B2 - Cooling device for internal combustion engine for saddle riding type vehicle - Google Patents

Description

  According to the present invention, a cooling fan is provided at an end of a crankshaft that is rotatably supported by a crankcase of a water-cooled internal combustion engine and extends in the vehicle width direction, and a radiator disposed outside the cooling fan in the axial direction. The present invention relates to a cooling apparatus for an internal combustion engine for a saddle-ride type vehicle, which is covered from the outside with a radiator cover.

  A radiator is fixed to the crankcase via a fan cover that covers a cooling fan provided at one end of the crankshaft from the side, and a radiator cover that covers the radiator from the outside is fixed to the fan cover, and air from the cooling fan is removed. Japanese Patent Application Laid-Open No. H11-228707 discloses a fan outlet provided on the fan cover for discharging to the outside.

Japanese Patent No. 4512025

  However, since the structure disclosed in Patent Document 1 has a structure in which the radiator is fixed to the fan cover, the fan cover needs to have rigidity necessary to support the radiator. As a result, the rigidity of the fan cover may be reduced. For this reason, the air outlet must be formed while ensuring the rigidity of the fan cover, and there is a problem that the shape and size of the air outlet are easily limited.

  The present invention has been made in view of such circumstances, and provides a cooling device for a saddle-ride type internal combustion engine for a saddle-ride type vehicle, which can increase the degree of freedom in designing the shape and size of an exhaust port. With the goal.

  In order to achieve the above object, the present invention provides a cooling fan at the end of a crankshaft that is rotatably supported by a crankcase of a water-cooled internal combustion engine and extends in the vehicle width direction. In a cooling apparatus for a saddle-ride type vehicle internal combustion engine, in which a radiator disposed outward is covered with a radiator cover, the radiator and the radiator cover are directly fixed to the crankcase, and the radiator cover A peripheral wall portion extending to the crankcase side so as to cover the cooling fan from the radial direction through the side of the radiator is integrally provided, and air from the cooling fan is discharged to the peripheral wall portion to the outside. The first feature is that an exhaust port is provided.

  In addition to the configuration of the first feature, the present invention has a second feature that a plurality of radiator mounting bosses for mounting the radiator are projected from the crankcase.

  According to the present invention, in addition to the configuration of the first or second feature, a cylinder block and a cylinder head that are in front of the crankcase in a side view are provided on the crankcase, and the cylinder block is interposed between the cylinder head and the crankcase. A third feature is that the blocks are connected so as to sandwich the block, and the exhaust port is provided at a rear portion of the radiator cover.

  In addition to any of the configurations of the first to third features, the present invention includes a first cover portion that covers the rear end portion of the radiator, a first cover portion, and a rear wall portion behind the radiator. And a second cover portion that is continuous with the first cover portion so as to bulge rearward and covers the cooling fan from the outside in the radial direction, and the first cover portion and the second cover portion. A fourth feature is that at least the second cover portion is provided with the air outlet.

  In the present invention, in addition to any one of the first to fourth features, the radiator includes an upper tank, a lower tank disposed below the upper tank, and between the upper tank and the lower tank. A core portion provided, wherein both the upper tank and the lower tank overlap with a part of the cooling fan when viewed from either the axial direction or the radial direction of the cooling fan and the radiator. A fifth feature is that the relative position is set.

  In addition to any of the configurations of the first to fifth features, the present invention provides air from the cooling fan in a portion of the peripheral wall that covers the lower end of the radiator from below and extends toward the crankcase. A sixth feature is that a second air exhaust port for discharging the air to the outside is provided.

  In addition to the configuration of the sixth feature of the present invention, a cooling water outlet pipe that has passed through the radiator is provided at a front portion of a lower tank provided in the radiator, and the outlet pipe serves as a second exhaust port. A seventh characteristic is that the light passes through and protrudes from the radiator cover to the outside.

  According to the first feature of the present invention, the radiator and the radiator cover are directly fixed to the crankcase, and the exhaust port is provided in the peripheral wall portion provided on the radiator cover and covering the cooling fan from the outside in the radial direction. In addition, by providing an air outlet in the radiator cover that does not require relatively rigidity, the degree of freedom in design such as the shape and size of the air outlet can be increased. In addition, since the radiator is directly fixed to the crankcase, there is no need for a member for supporting the radiator other than the crankcase, and the cooling device can be reduced in the number of parts.

  According to the second feature of the present invention, a radiator is attached to a plurality of radiator mounting bosses projecting from the crankcase so that a gap can be easily formed between the crankcase and the radiator, and air from the cooling fan can be formed. Can be easily discharged.

  According to the third feature of the present invention, the cylinder head is located in front of the radiator cover, whereas the exhaust port is provided at the rear of the radiator cover, so that the exhaust port is heated by passing through the radiator. It is possible to prevent the influence of the heat discharged from the air from reaching the cylinder block and the cylinder head side.

  According to the fourth aspect of the present invention, the first cover portion that covers the rear end portion of the radiator on the peripheral wall portion of the radiator cover behind the radiator, and the second cover portion that covers the cooling fan from the outside in the radial direction. Since at least the second cover portion is provided with the air exhaust port, it is possible to improve the exhaust air efficiency by bringing the air exhaust port as close as possible to the cooling fan. Further, since the second cover portion is formed so as to bulge rearward from the first cover portion, the attachment / detachment operation of the radiator cover from the outside of the vehicle is facilitated.

  According to the fifth aspect of the present invention, both the upper tank and the lower tank of the radiator overlap with a part of the cooling fan when viewed from both the axial direction and the radial direction of the cooling fan. Not only can the cooling fan be brought close to increase the cooling efficiency of the radiator by the cooling fan, but also the protrusion of the radiator in the axial direction of the crankshaft can be suppressed to ensure a sufficient bank angle of the vehicle.

  According to the sixth aspect of the present invention, since the second exhaust port is provided in a portion of the peripheral wall portion that covers the lower end portion of the radiator from below, the heat effect due to the exhaust air reaches the cylinder block and the cylinder head side. The amount of exhaust air can be increased while preventing

  Furthermore, according to the seventh feature of the present invention, a cooling water outlet pipe is provided in the front part of the lower tank of the radiator, and this outlet pipe penetrates the second exhaust outlet, so that an exhaust area is secured and enlarged. However, the outlet pipe can be easily piped.

1 is a side view of a scooter type motorcycle. FIG. It is an enlarged side view of a power unit. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 in FIG. 2. It is a principal part side view which shows the state which removed the cover member, the generator, the radiator, and the radiator cover from FIG. FIG. 6 is a side view of an essential part corresponding to FIG. 5 in a state where a radiator is attached to the crankcase. FIG. 7 is a view taken in the direction of arrow 7 in FIG. 2. FIG. 8 is a view taken in the direction of arrow 8 in FIG. 2. It is the perspective view which looked at the radiator cover from the inner side.

  Embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the front and rear, the top and bottom, and the left and right directions are directions as viewed from the occupant riding the motorcycle.

  First, in FIG. 1, a body frame F of a scooter type motorcycle that is a saddle-ride type vehicle includes a head pipe 11 at the front end thereof, a main frame 12 having a front end portion coupled to the head pipe 11, and a vehicle width direction. A cross pipe 13 that extends and is provided at the rear portion of the main frame 12 and a pair of left and right rear frames 14 that are connected to both ends of the cross pipe 13 at the front end portions. A front fork 15 that supports the front wheel WF and a rod-shaped steering handle 16 are supported on the head pipe 11 so as to be steerable.

  The main frame 12 integrally includes a down frame portion 12a inclined downward from the head pipe 11 and a lower frame portion 12b extending substantially rearward from the rear end of the down frame portion 12a. One pipe is formed by bending. The rear frame 14 is inclined upward and backward from the cross pipe 13 and extends upward, and the rear frame 14 extends upward from the upper end of the rising frame portion 14a at a gentler inclination angle than the rising frame portion 14a. The seat rail portion 14b that is inclined and extends rearward is integrally formed, and a single pipe is formed by bending.

  A unit swing type power unit P is connected via a link 18 to a bracket 17 provided at a front portion of the rear frames 14 in the body frame F, that is, a lower portion of the rising frame portion 14a, and the power unit P swings up and down. The rear wheel WR is pivotally supported on the rear portion of the power unit P, while being supported by the vehicle body frame F so as to be able to move. A rear cushion unit 17 is provided between the rear part of the seat rail part 14b of the left rear frame 14 and the rear part of the power unit P among the pair of left and right rear frames 14.

  A storage box 20 is supported between the front portions of the rear frames 14 in the vehicle body frame F, and a tandem type riding seat 21 that covers the storage box 20 from above can be opened and closed. Supported by Further, a fuel tank 22 supported by the rear frames 14 is disposed behind the storage box 18 so as to be covered with the riding seat 21.

  The vehicle body frame F, a part of the power unit P, the storage box 20 and the fuel tank 22 are covered with a vehicle body cover 23, and a leg shield that covers a leg portion of an occupant sitting on the riding seat 21 from the front. 24, a step floor 25 connected to the lower part of the leg shield 24 so that an occupant sitting on the riding seat 21 places his / her foot on the front side of the power unit P, and both sides of the step floor 25 A pair of left and right skirt portions 26 that hang downward from the side, and a side cover 27 that covers the storage box 20 and the fuel tank 22 from the side.

  2 and 3, the power unit P includes a water-cooled internal combustion engine E and a power transmission device T that transmits the rotational power of the internal combustion engine E to the rear wheel WR. The engine body 31 of the engine E is coupled to the crankcase 32 having a crankcase 32 that rotatably supports a crankshaft 36 having an axis along the vehicle width direction, and a cylinder axis that is slightly inclined upward. In addition, a cylinder block 33 disposed in front of the crankcase 32 and a cylinder block 33 disposed in front of the cylinder block 33 and coupled to the crankcase 32 so as to sandwich the cylinder block 33 between the crankcase 32 and the cylinder block 33. A cylinder head 34 and a head cover 35 coupled to the cylinder head 34. The outer surface of the die block 33 a plurality of fins 33a ... is projected, the crankcase 32 comprises two split case half 37 and right case half 38 has right and left are coupled to each other.

  The left case half 32 is provided with a transmission case 39 extending to the left side of the rear wheel WR. The power transmission device T is accommodated in the transmission case 39, and the power transmission device T Comprises a belt type continuously variable transmission 40, a centrifugal clutch 41, and a gear reduction mechanism 42.

  An axle 43 of the rear wheel WR is rotatably supported on the transmission case 39, and a transmission shaft 44 disposed between the crankshaft 36 and the axle 43 is rotatably supported. The continuously variable transmission 40 has a V-belt 47 wound around a drive pulley 45 provided at the left end portion of the crankshaft 36 and a driven pulley 46 that is rotatably supported by the transmission shaft 44. The drive pulley 45 is configured to change the winding diameter of the V belt 47 in accordance with the rotational speed of the crankshaft 36, and the driven pulley 46 has a winding diameter in accordance with the change in the winding diameter of the drive pulley 45. Configured to change. The centrifugal clutch 41 is provided between the driven pulley 46 and the transmission shaft 44, and the gear transmission mechanism 42 is provided between the transmission shaft 44 and the axle 43.

  Referring also to FIG. 4, the right end of the crankshaft 36 passes through the right case half 38 rotatably through a ball bearing 48 with a seal. Further, a housing forming portion 38a that protrudes slightly from the outer surface and surrounds the crankshaft 36 and extends in an endless manner is integrally formed on the outer surface of the right case half 38, and the housing forming portion 38a is integrally provided with the housing forming portion 38a. The cover member 49 is fastened. Thus, the crankshaft 36 also rotatably penetrates the cover member 49, and an annular seal member 50 is interposed between the cover member 49 and the crankshaft 36.

  An outer rotor 52 is fixed to the right end portion of the crankshaft 36 at a portion protruding from the cover member 49, and an inner stator 53 surrounded by the outer rotor 52 so as to form a generator 51 together with the outer rotor 52. Is fixed to the cover member 49.

  A cooling fan 55 is fixed to the right end portion of the crankshaft 36 so as to be disposed outside the generator 51. In this embodiment, the cooling fan 55 is fixed to the outer rotor 50 of the generator 51. The cooling fan 55 is fixed by a plurality of bolts 56. A radiator 57 is disposed on the axially outward side of the cooling fan 55 on the right side of the crankshaft 36. The radiator 57 includes an upper tank 58, a lower tank 59 disposed below the upper tank 58, and a core portion 60 provided between the upper tank 58 and the lower tank 59, and a radiator cover 61. Covered from outside.

  The radiator 57 and the radiator cover 61 are directly fixed to the right case half 38 of the crankcase 32.

  5 and 6 together, the right case half 38 of the crankcase 32 is integrally provided with an extending portion 38b extending outwardly so as to surround the generator 51, and the housing. The formation portion 38a is formed to extend forward from the front lower portion of the extension portion 38b, and an oil pump 63 to which power is transmitted from a drive gear 62 (see FIGS. 2 and 3) provided on the crankshaft 36. It is disposed between the housing forming portion 38a and the cover member 49.

  The radiator 57 has an upper tank 58 and a lower tank 59 that are directly fixed to the right case half 38 of the crankcase 32, and protrudes above the extension portion 38b of the right case half 38. A pair of front and rear mounting portions 68 and 69 provided in the upper tank 58 are attached to a pair of front and rear radiator mounting bosses 64 and 65 by bolts 72 and 73, and a pair of front and rear that project from the lower portion of the extending portion 38b. A pair of front and rear mounting portions 70, 71 provided in the lower tank 59 are attached to the radiator mounting bosses 66, 67 with bolts 74, 75.

  In addition, with the radiator 57 attached to the crankcase 32, the relative positions of the cooling fan 55 and the radiator 57 are such that both the upper tank 58 and the lower tank 59 of the radiator 57 are part of the cooling fan 55. It is set so as to overlap when viewed from either the axial direction or the radial direction. That is, in FIG. 4, a projection line L <b> 1 extending the outer periphery of the cooling fan 55 outward passes through the lower part of the upper tank 58 and the upper part of the lower tank 59, and passes through the inner ends of the upper tank 58 and the lower tank 59. The connecting line L2 crosses the cooling fan 55.

  7 to 9, the radiator cover 61 includes a flat cover plate portion 76 that covers the radiator 57 from the outside, and an extension of the right case half 38 from the periphery of the cover plate portion 76. The cover plate portion 76 is formed with a cooling air introduction port 78 opened corresponding to the core portion 60 of the radiator 57. The peripheral wall portion 77 extends to the outlet portion 38b side. In addition, a lattice portion 79 that divides the cooling air introduction port 78 into a plurality of portions in the vertical and front-rear directions is provided.

  The radiator cover 61 is directly fixed to the extension portion 38b of the right case half 38 in the crankcase 32, and a pair of front and rear cover mounting bosses 81 provided on the extension portion 38b. 82, a pair of front and rear attachment portions 84, 85 provided on the radiator cover 61 are attached by bolts 87, 88, and the radiator cover is attached to one cover attachment boss 83 provided at a lower portion of the extension portion 38b. A mounting portion 86 provided at a lower portion of 61 is mounted with a bolt 89.

  When the radiator cover 61 is fixed to the right case half 38, the peripheral wall portion 77 of the radiator cover 61 passes through the side of the radiator 57 and covers the cooling fan 55 from the outside in the radial direction. The first and second air exhaust ports 91 for discharging the air from the cooling fan 55 to the outside on the peripheral wall portion 77. 92... Are provided.

  The first air exhaust ports 91 are provided in the peripheral wall portion 77 at the rear portion of the radiator cover 61. In addition, a first cover 77a covering the rear end portion of the radiator 57 and a first cover so as to bulge rearward from the first cover 77a are formed on the peripheral wall 77 behind the radiator 57. A second cover portion 77b that is provided continuously with the portion 77a and covers the cooling fan 55 from the outside in the radial direction, and at least a second cover portion of the first cover portion 77a and the second cover portion 77b is formed. 77b is provided with first air exhaust ports 91, and in this embodiment, a plurality of locations of the second cover portion 77b spaced from each other vertically and the second cover portion 77b of the first cover portions 77a. Are provided with a plurality of first air exhaust ports 91 at intervals above and below the upper portion.

  Further, as clearly shown in FIG. 8, the plurality of second air outlets 92 are provided in a portion of the peripheral wall portion 77 that covers the lower end portion of the radiator 57 from below and extends toward the crankcase 32.

  Referring to FIG. 2, a water pump 94 interlocking with the rotation of the crankshaft 36 is disposed on the right side of the cylinder head 33 in the engine body 31. By the way, the housing forming part 38a integrally projecting on the outer surface of the right case half 38 and a part of the cover member 49 fastened to the housing forming part 38a are formed on the extension part 38b of the right case half 38. The pump case 95 of the water pump 94 includes a front part of the cover member 49 and a pump cover 96 fastened to the cover member 49.

  The cooling water discharged from the water pump 94 is supplied to a water jacket (not shown) in the cylinder head 34 through the cylinder block 33, and the cooling water discharged from the water jacket is passed through the pipe 97. Cooling water that has been guided to the upper tank 58 of the radiator 57 and circulated through the core portion 60 from the upper tank 58 is guided to the lower tank 59.

  A cooling water outlet pipe 98 is provided at a front portion of the lower tank 59, and the outlet pipe 98 passes through one of the second air exhaust ports 92, and protrudes outside from the radiator cover 61. In the second exhaust ports 92, the exhaust ports 92 through which the lead-out pipe 98 passes are formed in a notch shape opened downward to facilitate attachment and detachment of the radiator cover 61.

  On the other hand, a thermostat 99 is fixedly disposed in the pump case 95, and a lead-out pipe 98 for leading cooling water from the lower tank 59 is connected to the thermostat 99 via a hose 100. Further, the cooling water led out from the water jacket of the cylinder head 34 can be guided to the thermostat 99 via the bypass hose 101 branched from the pipe line 97, and the thermostat 99 has a temperature of the cooling water. The amount of cooling water flowing from the bypass hose 101 to the water pump 94 is adjusted accordingly.

  Next, the operation of this embodiment will be described. A cooling fan 55 is provided at the right end of the crankshaft 36, and a radiator 57 disposed axially outward of the cooling fan 55 is disposed outside by the radiator cover 61. The radiator 57 and the radiator cover 61 are directly fixed to the crankcase 32, and the radiator fan 61 passes through the side of the radiator 57 so as to cover the cooling fan 55 from the outside in the radial direction. A peripheral wall 77 extending toward the crankcase 32 is integrally provided, and the peripheral wall 77 is provided with first and second air exhaust ports 91... 92 for exhausting air from the cooling fan 55 to the outside. In the radiator cover 61 that does not require relatively rigidity, the first and second air exhaust ports 91, 92, ... are provided, 1 and the second air discharge port 91 ..., it is possible to increase the freedom in design, such as 92 ... shape and size of the. In addition, since the radiator 57 is directly fixed to the crankcase 32, a member for supporting the radiator 57 other than the crankcase 32 is unnecessary, and a cooling device with a reduced number of parts can be obtained.

  Further, since a plurality of radiator mounting bosses 64, 65, 66, and 67 for mounting the radiator 57 are projected from the crankcase 32, it is easy to form a gap between the crankcase 32 and the radiator 57, and the cooling fan 55 is provided. Can be easily discharged.

  Further, the cylinder block 33 and the cylinder head 34 are disposed in front of the crankcase 32 in a side view, whereas the first air exhaust ports 91 are provided at the rear portion of the radiator cover 61, and thus pass through the radiator 57. Thus, it is possible to prevent the thermal influence due to the air that is heated and discharged from the first exhaust ports 91... From reaching the cylinder block 33 and the cylinder head 34 side.

  A first cover 77a covering the rear end of the radiator 57 and a first cover so as to bulge rearward of the first cover 77a on the peripheral wall 77 of the radiator cover 61 behind the radiator 57. A second cover 77b that is continuous with the portion 77a and covers the cooling fan 55 from the outside in the radial direction is formed, and at least the second cover 77b of the first cover 77a and the second cover 77b is formed. Since the first exhaust ports 91 are provided, the first exhaust ports 91 can be made as close as possible to the cooling fan 55 to improve the exhaust efficiency, and the second cover portion 77b is the first cover portion. Since it is formed so as to bulge rearward from 77a, it is easy to attach and detach the radiator cover 61 from the outside of the vehicle.

  The relative positions of the cooling fan 55 and the radiator 57 are set so that both the upper tank 58 and the lower tank 59 of the radiator 57 overlap with a part of the cooling fan 55 when viewed from either the axial direction or the radial direction. Therefore, not only can the radiator 57 and the cooling fan 55 be brought close to each other to increase the cooling efficiency of the radiator 57 by the cooling fan 55, but also the protrusion of the radiator 57 in the axial direction of the crankshaft 36 can be suppressed and the motorcycle bank Enough corners can be secured.

  Further, a second exhaust port 92 for exhausting the air from the cooling fan 55 to the outside is provided in a portion of the peripheral wall portion 77 that covers the lower end portion of the radiator 57 from below and extends toward the crankcase 32 side. The amount of exhausted air can be increased while preventing the influence of heat from the wind from reaching the cylinder block 33 and the cylinder head 34 side.

  Further, a cooling water outlet pipe 98 that has passed through the radiator 57 is provided at a front portion of the lower tank 59 provided in the radiator 57, and the outlet pipe 98 passes through one of the second exhaust ports 92. Therefore, the outlet pipe 98 can be easily piped while securing and expanding the exhaust air area.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

32 ... Crankcase 33 ... Cylinder block 34 ... Cylinder head 36 ... Crankshaft 55 ... Cooling fan 57 ... Radiator 58 ... Upper tank 59 ... Lower tank 60 ... · Core 61 ··· Radiator covers 64, 65, 66, 67 ··· Radiator mounting boss 77 ··· Peripheral wall portion 77a ··· First cover portion 77b ··· Second cover portion 91 ··· First Exhaust port 92 ... second exhaust port 98 ... outlet pipe E ... internal combustion engine

Claims (7)

  A cooling fan (55) is provided at the end of a crankshaft (36) that is rotatably supported by a crankcase (32) of a water-cooled internal combustion engine (E) and extends in the vehicle width direction. The cooling fan (55) In the cooling device for an internal combustion engine for a saddle-ride type vehicle, in which a radiator (57) disposed axially outward is covered from the outside by a radiator cover (61), the radiator (57) and the radiator cover (61) The crankcase (32) is directly fixed to the radiator cover (61) through the side of the radiator (57) so as to cover the cooling fan (55) from the outside in the radial direction. A peripheral wall portion (77) extending toward the case (32) is integrally provided, and the peripheral wall portion (77) discharges air from the cooling fan (55) to the outside. 91) cooling device for a saddle-type vehicle internal combustion engine, characterized in that is provided.   The saddle-ride type vehicle according to claim 1, wherein a plurality of radiator mounting bosses (64, 65, 66, 67) for mounting the radiator (57) project from the crankcase (32). For internal combustion engine.   In the crankcase (32), a cylinder block (33) and a cylinder head (34) in front of the crankcase (32) in a side view are disposed between the cylinder head (34) and the crankcase (32). The internal combustion engine for a saddle-ride type vehicle according to claim 1 or 2, wherein the exhaust block (91) is provided at a rear portion of the radiator cover (61) and is coupled so as to sandwich a cylinder block (33). Cooling system.   A first cover part (77a) that covers the rear end of the radiator (57) and bulges rearward of the first cover part (77a) on the peripheral wall part (77) behind the radiator (57). In this way, a second cover part (77b) is formed which is connected to the first cover part (77a) and covers the cooling fan (55) from the outside in the radial direction, and the first cover part (77a). The internal exhaust for a saddle-ride type vehicle according to any one of claims 1 to 3, wherein the exhaust port (91) is provided in at least the second cover portion (77b) of the second cover portion (77b). Engine cooling system.   The radiator (57) is provided between an upper tank (58), a lower tank (59) disposed below the upper tank (58), and the upper tank (58) and the lower tank (59). A core portion (60), and both the upper tank (58) and the lower tank (59) are part of the cooling fan (55) when viewed from either the axial direction or the radial direction. The cooling apparatus for an internal combustion engine for a saddle-ride type vehicle according to any one of claims 1 to 4, wherein the relative positions of the cooling fan (55) and the radiator (57) are set so as to overlap each other.   A second portion that discharges air from the cooling fan (55) to a portion of the peripheral wall portion (77) that covers the lower end of the radiator (57) from below and extends toward the crankcase (32). The cooling device for an internal combustion engine for a saddle-ride type vehicle according to any one of claims 1 to 5, wherein an exhaust port (92) is provided.   A cooling water outlet pipe (98) that has passed through the radiator (57) is provided at a front portion of a lower tank (59) included in the radiator (57), and the outlet pipe (98) serves as a second exhaust port ( 92. The cooling device for an internal combustion engine for a saddle-ride type vehicle according to claim 6, wherein the cooling device protrudes outside from the radiator cover (61) through 92).

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