Radiator exhaust structure for saddle-type vehicle

Abstract

Provided is a radiator air discharge structure for a saddle-type vehicle capable of satisfactorily 5 controlling discharged air of a radiator. A radiator air discharge structure for a motorcycle including a radiator 66 disposed behind a front wheel 13 and a lower opening 61c discharging discharged air passing through the radiator 66 to a 10 lower side of a vehicle body includes, behind the radiator 66, a discharged air regulating member 85 that covers the radiator 66 and that guides the discharged air of the radiator 66 to the lower opening 61c. The discharged air regulating member 85 includes a rear 15 opening 85e through which some of the discharged air of the radiator 66 can flow further upward than the radiator 66.

Description

Technical Field

[0001] The present invention relates to a radiator airdischarge structure for a saddle-type vehicle. Background Art

[0002] Conventionally, as a saddle-type vehicle of ascooter type, there has been known a vehicle in which aradiator is disposed behind a front fender, and in which an air discharge port is provided in anundercover that covers the lower portion of a vehiclebody (See, for example, Patent Literature 1.).The discharged air having passed through theradiator flows to the lower side of the vehicle body through the air discharge port.Citation ListPatent Literature

[0003] Patent Literature 1: Japanese Utility ModelRegistration No. 3170123Summary of InventionTechnical Problem

[0004] In the above-described vehicle, there is a casewhere the discharged air does not completely flow outof the air discharge port and flows inside the vehicle. For example, the discharged air flows into a spacebetween the undercover and a floor step. Inparticular, in a case where the air discharge amount islarge, the amount of heat of the discharged air flowingrearward from the radiator is large. Therefore, in a case where an electric component such as a battery isdisposed in this space, there is a concern about aninfluence of heat on the electric component.An object of the present invention is to providea radiator air discharge structure for a saddle-type vehicle capable of satisfactorily controllingdischarged air of a radiator.Solution to Problem

[0005] The present description includes all thecontents of Japanese Patent Application No. 2020-063468filed on March 31, 2020.A radiator air discharge structure for a saddletype vehicle of a scooter type including a radiator(66) disposed behind a front wheel (13) and an airdischarge port (61c) discharging discharged air passingthrough the radiator (66) to a lower side of a vehiclebody, the radiator air discharge structure for a saddle-type vehicle includes, behind the radiator (66),a discharged air wall (85) that covers the radiator(66) and that guides the discharged air of the radiator(66) to the air discharge port (61c). The dischargedair wall (85) includes an opening (85e) through which some of the discharged air of the radiator (66) canflow further upward than the radiator (66).

[0006] In the above configuration, a front inner cover(53) that covers a rear surface of a vehicle front portion may be provided behind the radiator (66), andthe opening (85e) of the discharged air wall (85) mayface a front surface of the front inner cover (53).Also, in the above configuration, the frontinner cover (53) may be inclined so that an upper portion of the front inner cover is located furtherforward than a lower portion of the front inner cover.

[0007] Also, in the above configuration, a protectivewall (143b) that protrudes from the front surface ofthe front inner cover (53) toward a vehicle front andthat prevents the discharged air of the radiator (66)from rising may be disposed.Also, in the above configuration, the protective wall (143b) may be provided further upward than a lowerend of a lighting device (141) provided at the vehiclefront portion.

[0008] Also, in the above configuration, the discharged air wall (85) may include a rear wall portion (85d)opposed to a rear surface of the radiator (66), therear wall portion (85d) may be disposed behind aninclined wall (61g) extending upward and diagonallyforward from a rear edge portion of the air discharge port (61c), and the opening (85e) may be disposedfurther upward than the inclined wall (61g).Also, in the above configuration, a center frame(20) may extend downward from a head pipe (18)constituting a front end portion of a vehicle body frame (11), and may be connected to a cross frame (94)located behind the inclined wall (61g) and extending ina vehicle width direction, and the rear wall portion(85d) may be supported by the center frame (20).Advantageous Effects of Invention

[0009] A radiator air discharge structure for a saddletype vehicle includes, behind a radiator, a discharged air wall that covers the radiator and that guidesdischarged air of the radiator to an air dischargeport, and the discharged air wall includes an openingthrough which some of the discharged air of theradiator can flow further upward than the radiator. Hence, by causing some of the discharged air of theradiator to flow upward, the direction of thedischarged air of the radiator can favorably becontrolled, and an influence of heat on electriccomponents and the like can be suppressed. Depending on the layout of the vehicle, it isdifficult to provide a large space between the radiatorand the discharged air wall, and the discharged air ofthe radiator may stagnate between the radiator and thedischarged air wall, leak out from the gap or the like between the discharged air wall and the periphery ofthe discharged air wall, and enter the rear part or thelike in the vehicle body. However, in the presentinvention, this can be suppressed by controlling thedischarged air of the radiator.

[0010] In the above configuration, a front inner coverthat covers a rear surface of a vehicle front portionis provided behind the radiator, and the opening of the discharged air wall faces a front surface of the frontinner cover. Hence, the discharged air of the radiatordischarged from the opening can flow upward along thefront inner cover, and an influence of heat on electriccomponents and the like disposed on the upper front portion of the vehicle can be suppressed.

[0011] Also, in the above configuration, the frontinner cover is inclined so that an upper portion of thefront inner cover is located further forward than a lower portion of the front inner cover. Hence, thedischarged air of the radiator can flow upward alongthe front inner cover more reliably, and an influenceof heat on the electric components and the likedisposed on the upper front portion of the vehicle can be suppressed.

[0012] Also, in the above configuration, a protectivewall that protrudes from the front surface of the frontinner cover toward a vehicle front and that preventsthe discharged air of the radiator from rising isdisposed. Hence, the rise of the discharged air of theradiator can be delayed, and the temperature of thedischarged air of the radiator can be lowered before the discharged air of the radiator reaches a vehicleupper part. This makes it possible to suppress aninfluence of heat on the vehicle upper part. Forexample, it is possible to suppress an influence ofheat on electric components and the like around a handlebar.

[0013] Also, in the above configuration, the protectivewall is provided further upward than a lower end of alighting device provided at the vehicle front portion. Hence, the protective wall can change the course of thedischarged air of the radiator at a position furtherupward than the lower end of the lighting device, andthe amount of the discharged air of the radiatorflowing to the lighting device can be suppressed. Also, in the above configuration, the dischargedair wall includes a rear wall portion opposed to a rearsurface of the radiator, the rear wall portion isdisposed behind an inclined wall extending upward anddiagonally forward from a rear edge portion of the airdischarge port, and the opening is disposed furtherupward than the inclined wall. Hence, the dischargedair of the radiator can flow separately to the lowerside of the vehicle body and to the upper side of the vehicle body.

[0014] Also, in the above configuration, a center frameextends downward from a head pipe constituting a frontend portion of a vehicle body frame, and is connected to a cross frame located behind the inclined wall andextending in a vehicle width direction, and the rearwall portion is supported by the center frame. Hence,the discharged air wall can be supported using a partof the vehicle body frame, and it is not necessary to specially provide the support portion for thedischarged air wall. Also, since the center frame isdisposed behind the inclined wall, the center framedoes not hinder the flow of the discharged air flowingto the lower side of the vehicle body, and the discharged air of the radiator can smoothly flow to thelower side of the vehicle body.Brief Description of Drawings

[0015] Fig. 1 is a left side view of a motorcycleaccording to an embodiment of the present invention.Fig. 2 is a perspective view of a radiator andthe surroundings of the radiator. Fig. 3 is a perspective view of a discharged airregulating member and an undercover.Fig. 4 is a perspective view of the radiator andthe discharged air regulating member, and thesurroundings of the radiator and the discharged air regulating member.Fig. 5 is a perspective view of the dischargedair regulating member.Fig. 6 is a cross-sectional view obtained byvertically cutting, in the front-rear direction, the center in the vehicle width direction of the frontportion of the motorcycle.Description of Embodiments

[0016] An embodiment of the present invention will bedescribed below with reference to drawings. In thedescription, directions such as front, rear, left,right, up, and down directions are the same asdirections with respect to a vehicle body unlessotherwise specified. In each of the drawings, areference symbol FR denotes a front direction of thevehicle body, a reference symbol UP denotes an upperdirection of the vehicle body, and a reference symbol LH denotes a left direction of the vehicle body.Fig. 1 is a left side view of a motorcycle 10according to the embodiment of the present invention.In the motorcycle 10, a front wheel 13 issupported, via a front fork 12, at the front end portion of a vehicle body frame 11, and a rear wheel 15is supported, via a power unit 14, at the lower portionof the vehicle body frame 11.The motorcycle 10 is a saddle-type vehicle onwhich a driver rides by straddling a seat 16 disposed on the upper side of the vehicle body frame 11.

[0017] The vehicle body frame 11 includes a head pipe18, a pair of right and left down frames 19A, a pair ofright and left lower frames 19B, a center frame 20, a20 pair of right and left rear frames 21, and a pair ofright and left floor frames 22.The head pipe 18 configures the front endportion of the vehicle body frame 11, and is inclinedrearward in a vehicle side view. The right and leftdown frames 19A extend downward and diagonallylaterally from the right and left of the lower portionof the head pipe 18.

[0018] The right and left lower frames 19B integrallyextend rearward from the rear ends of bent portions 19Cprovided at the lower end portions of the right andleft down frames 19A. The center frame 20 extendsdownward and diagonally rearward from the upper portion of the head pipe 18 behind the right and left downframes 19A. The right and left rear frames 21 extendrearward and diagonally upward from the rear portionsof the right and left lower frames 19B, respectively.The right and left floor frames 22 are located above the right and left lower frames 19B in a vehicle sideview, are connected at the front thereof to the rightand left down frames 19A and at the rear thereof to theright and left rear frames 21, and support a floor step56 described in detail below.

[0019] The front fork 12 is rotatably supported by thehead pipe 18, a handlebar 31 is attached to the upperend portion of the front fork 12, and the front wheel13 is supported, via an axle 32, on the lower endportion of the front fork 12. The front wheel 13 iscovered with a front fender 33 attached to the frontfork 12 from above.The power unit 14 is attached, via links, to the rear end portions of the right and left lower frames19B so as to be swingable up and down, and includes anengine 35 configuring a front portion and acontinuously variable transmission 36 integrallyprovided at the rear portion of the engine 35. A vehicle body cover 46 covering the vehiclebody frame 11 includes a front cover 51, a pair ofright and left front side covers 52, a front innercover 53, the floor step 56, a pair of right and leftfloor side skirts 57, a center cover 58, a pair of right and left body side covers 59, a handle cover 60,and an undercover 61.

[0020] The front cover 51 covers the head pipe 18 andthe periphery thereof from the front. The right and left front side covers 52 are provided continuously tothe lower edge portion of the front cover 51 to coverthe upper portion of the front fork 12 from the sidesand the rear, and are connected to the right and leftends of the front cover 51 to cover the legs of thedriver from the front. The front inner cover 53 coversthe right and left down frames 19A and the center frame from the rear, and, behind a radiator 66, isinclined so that the upper portion thereof is located further forward than the lower portion thereof.The floor step 56 extends downward and rearwardfrom the lower end portion of a leg shield 54 andserves as a foot placement portion for the driver. Theright and left floor side skirts 57 extend downward from the right and left edge portions of the floor step56.

[0021] The center cover 58 extends from the rear end ofthe floor step 56 to the lower side of the front end portion of the seat 16.The right and left body side covers 59 extendbelow the side edge of the seat 16 from the floor step56 and the center cover 58 to the rear of the vehiclebody. The handle cover 60 covers the center of the handlebar 31.The undercover 61 is disposed between therespective lower edges of the right and left floor sideskirts 57 and covers the lower portion of the vehiclebody from below.Between the right and left down frames 19A, theradiator 66 is disposed. Note that one down frame 19Amay be provided.

[0022] Fig. 2 is a perspective view of the radiator 66and the surroundings of the radiator 66 as vieweddiagonally from the front.Each of the right and left down frames 19Aincludes, at the lower end portion thereof, the bent portion 19C bent rearward, and a lower front crossframe 81 is stretched between the right and left bentportions 19C.The radiator 66 is disposed between the rightand left down frames 19A and above the lower front cross frame 81 so as to be inclined rearward withrespect to the vertical direction.

[0023] The radiator 66 includes an upper tank 66a and alower tank 66b in which cooling water for cooling the engine 35 (see Fig. 1) is stored, and a core 66cdisposed between the upper tank 66a and the lower tank66b. The upper tank 66a is disposed at the upper endof the radiator 66, and the lower tank 66b is disposedat the lower end of the radiator 66.A discharged air regulating member 85 as adischarged air wall that regulates the direction of thedischarged air passing through the radiator 66 isdisposed so as to surround the upper, lower, left, right, and rear parts of the radiator 66.The front portion of the undercover 61 is fixed,by engagement, to the lower front cross frame 81provided below the radiator 66.

[0024] Fig. 3 is a perspective view of the dischargedair regulating member 85 and the undercover 61, andillustrates a state in which the vehicle body frame 11and the radiator 66 are omitted from the state of Fig. The discharged air regulating member 85 includesan upper wall portion 85a, a lower wall portion 85b,right and left side wall portions 85c, and a rear wallportion 85d, and covers the radiator 66 (see Fig. 2)with the upper wall portion 85a, the lower wall portion 85b, the right and left side wall portions 85c, and therear wall portion 85d.The undercover 61 includes, at the front portionthereof, a lower opening 61c as an air discharge portpenetrating in the up-down direction.

[0025] The undercover 61 includes a front wall 61eextending upward from a flat bottom wall 61d, a pair ofright and left side walls 61f and 61z, and an inclined rear wall 61g as an inclined wall inclined forward andupward. The front wall 61e, the right and left sidewalls 61f and 61z, and the inclined rear wall 61g formthe lower opening 61c.The side walls 61f and 61z extend further upward than the front wall 61e. The inclined rear wall 61gincludes a slit (not illustrated) through which therear edge of the side wall portion 85c on one side(right side) of the discharged air regulating member 85passes in the front-rear direction.

[0026] The side wall portion 85c on one side (rightside) of the discharged air regulating member 85 isdisposed further inside in the vehicle width directionthan the side wall 61f on one side (right side) of the undercover 61, and the side wall portion 85c on theother side (left side) of the discharged air regulatingmember 85 is disposed further outside in the vehiclewidth direction than the side wall 61z on the otherside (left side) of the undercover 61. A plurality ofradiator pipes 82 connected to the radiator 66 (seeFig. 2) are disposed between the side wall portion 85con the left side of the discharged air regulatingmember 85 and the side wall 61z on the left side of the undercover 61.The rear wall portion 85d of the discharged airregulating member 85 is disposed behind the inclinedrear wall 61g of the undercover 61, and a rear opening85e as an opening described in detail in the description of Fig. 4 is disposed further upward thanthe inclined rear wall 61g.

[0027] Fig. 4 is a perspective view of the radiator 66and the discharged air regulating member 85, and thesurroundings of the radiator 66 and the discharged airregulating member 85 as viewed diagonally from therear.The right and left lower frames 19B areconnected to each other by a lower rear cross frame 94, which serves as a cross frame bent so as to protrudeupward. The lower rear cross frame 94 extends in thevehicle width direction, and the lower end portion ofthe center frame 20 is connected to an uppermostportion 94a at the center of the lower rear cross frame94 in the vehicle width direction. The radiator 66 andmost of the discharged air regulating member 85 aredisposed in front of the center frame 20.

[0028] The discharged air regulating member 85includes, at the upper portion of the rear wall portion85d, a rear opening 85e, and an upper fixed portion 85fand a lower fixed portion 85g respectively provided atthe upper edge portion and the lower edge portion of the rear opening 85e.The rear opening 85e is located further upwardthan the inclined rear wall 61g (see Fig. 3), and iscapable of causing part of the discharged air of theradiator 66 to flow toward the rear of the radiator 66 and the upper part of the radiator 66.

[0029] The upper fixed portion 85f includes a pair ofright and left upper rear wall portions 85h and 85jconfiguring a part of the rear wall portion 85d, and the inner edge portions of the right and left upperrear wall portions 85h and 85j are engaged with eachother and fixed to the center frame 20. The lowerfixed portion 85g includes a horizontally long bandportion 85k the center portion of which is providedintegrally with the discharged air regulating member 85at the lower edge portion of the rear opening 85e. Theband portion 85k is wound around the center frame 20,and both the end portions of the band portion 85k are5 engaged, to cause the lower fixed portion 85g to befixed to the center frame 20.

[0030] Fig. 5 is a perspective view of the dischargedair regulating member 85, and illustrates a state in which the vehicle body frame 11, the undercover 61, areservoir tank 88, and the radiator 66 are omitted fromthe state illustrated in Fig. 4.The upper rear wall portion 85h on the left sideof the upper fixed portion 85f includes, at the loweredge portion thereof, a notch portion 85x in which awater suction port (not illustrated) of the radiator 66is disposed.The upper wall portion 85a of the discharged airregulating member 85 includes a right-left pair consisting of a left upper wall portion 85m and a rightupper wall portion 85n, and the inner side edgeportions of the left upper wall portion 85m and theright upper wall portion 85n are engaged with eachother. The left upper wall portion 85m and the rightupper wall portion 85n are respectively provided at theinner side edge portions thereof with semicircularnotch portions 85p, and the center frame 20 (see Fig.4) passes through a hole 85q formed by the right and left notch portions 85p. In addition, the right upperwall portion 85n includes a through hole 85r throughwhich a water filling port (not illustrated) of theradiator 66 (see Fig. 2) passes.

[0031] The outer side edge portions of the left upperwall portion 85m and the right upper wall portion 85nare respectively provided with outer extending portions85s (only one outer extending portion 85s isillustrated) integrally bent downward. The pair of right and left outer extending portions 85s extendsalong the right and left side wall portions 85c (onlyone side wall portion 85c is illustrated).Vertically long slits 85w are opened in theright and left side wall portions 85c and the right and left outer extending portions 85s, respectively. Theslits 85w are portions through which plate-shapedattached portions (not illustrated) provided on boththe side surfaces of the radiator 66 pass, and theslits 85w of the side wall portion 85c and the outerextending portion 85s overlap with each other in thevehicle width direction. By inserting the attachedportions into the slits 85w, the discharged airregulating member 85 can be held, and swinging of the discharged air regulating member 85 can be suppressed.

[0032] The left upper wall portion 85m and the rightupper wall portion 85n each include, at each of thefront edge portions thereof, an upper flange portion 85t bent upward, the right and left outer extendingportions 85s each include, at each of the front edgeportions thereof, a lateral flange portion 85u (onlyone lateral flange portion 85u is illustrated) bentlaterally, and the upper flange portion 85t and the lateral flange portion 85u are integrally formed.The rear wall portion 85d is provided at thelower edge portion thereof with a notch portion 85v,and the plurality of radiator pipes 82 pass through thenotch portion 85v.

[0033] Fig. 6 is a cross-sectional view obtained byvertically cutting, in the front-rear direction, thecenter in the vehicle width direction of the frontportion of the motorcycle 10.Disposed in front of the radiator 66 is a louver111. The louver 111 includes a plurality of louverboards 111a arranged to be separated from each other inthe up-down direction, and regulates a flow direction of air taken into the radiator 66. At the louver 111,air flows rearward and diagonally downward.An electric component 116 is disposed below thefloor step 56, above the undercover 61, and behind thelower rear cross frame 94.

[0034] In addition, the lower opening 61c of theundercover 61 is disposed behind the radiator 66. Anupper end 61p of the front wall 61e of the undercover61 is located further downward than a lower end 66j of the core 66c of the radiator 66.The inclined rear wall 61g includes an inclinedwall upper portion 61q extending in the up-downdirection immediately in front of the lower rear crossframe 94, an inclined wall lower portion 61r extending rearward and diagonally downward below the lower rearcross frame 94, and an inclined wall bent portion 61sbent in front of the lower rear cross frame 94 andconnected to the inclined wall upper portion 61q andthe inclined wall lower portion 61r. An upper end 61tof the inclined wall upper portion 61q is locatedbehind a fan motor 114.

[0035] The lower opening 61c and a space 118 surrounded by the front wall 61e, the right and left side walls61f and 61z (see Fig. 3), and the inclined rear wall61g form an air discharge path 120 through which thedischarged air of the radiator 66 passes.The air discharge path 120 is disposed below the lower rear cross frame 94 and the inclined rear wall61g (specifically, the inclined wall lower portion61r).The lower portion of the rear wall portion 85dof the discharged air regulating member 85 is disposed between the inclined rear wall 61g (specifically, theinclined wall upper portion 61q) of the undercover 61,and the lower portion of the center frame 20 and thelower rear cross frame 94. Since the center frame 20is located behind the discharged air regulating member 85, rearward displacement of the discharged airregulating member 85 can be prevented.

[0036] Air taken into the radiator 66 from the front ofthe radiator 66 via the louver 111 as indicated byarrow A becomes radiator discharged air and flowsbehind the radiator 66, more specifically, rearward anddiagonally downward along the inclined rear wall 61gthrough the air discharge path 120 as indicated by arrow B. Then, the air is further discharged from thelower opening 61c to the outside of the undercover 61,and flows rearward below the bottom wall 61d. Sincethe radiator 66 is inclined rearward, the radiatordischarged air easily flows rearward and diagonally downward.

[0037] The rear opening 85e of the discharged airregulating member 85 faces a front surface 53a of thefront inner cover 53. Around the head pipe 18 at the front portion ofthe vehicle, a headlight 141 as a lighting device, adischarged air suppressing member 143, and the like aredisposed.The discharged air suppressing member 143 includes a wall portion 143a extending in the up-downdirection, and the wall portion 143a is disposed alongthe front surface 53a of the front inner cover 53. Thewall portion 143a integrally includes a front extendingwall portion 143b as a protective wall protrudingforward from the front surface thereof.

[0038] The wall portion 143a is disposed in front ofthe front inner cover 53, and the front extending wall portion 143b obstructs the flow of the discharged airof the radiator 66 rising along the front surface 53aand delays the further upward movement.Note that the front extending wall portion 143bmay be formed integrally with the front surface 53a of the front inner cover 53.Reference sign 144 in the drawing denotes ahorizontal line along the lower end of the frontextending wall portion 143b, and the front extendingwall portion 143b is disposed further upward than a lower end 141a of the headlight 141.

[0039] Some of the discharged air of the radiator 66hits the rear wall portion 85d of the discharged airregulating member 85, rises, and flows out through the rear opening 85e as indicated by arrow C, some directlyflows out through the rear opening 85e as indicated byarrow D, and some rises along the front surface 53a ofthe front inner cover 53 as indicated by arrow E.Since the temperature of the discharged air of theradiator 66 is high, the discharged air is likely torise.The rising discharged air of the radiator 66 isthen prevented from rising by the front extending wall portion 143b of the discharged air suppressing member143, and thus rises while bypassing the front extendingwall portion 143b as indicated by arrow F.

[0040] During this time, since the temperature and the rising speed of the discharged air of the radiator 66are gradually lowered, the discharged air of theradiator 66 hardly flows toward the headlight 141 andan electric component 142, and an influence of heat onthe headlight 141 and the electric component 142 is suppressed. Furthermore, when the discharged air ofthe radiator 66 rises to the vicinity of the handlebar (see Fig. 1), an influence of heat on electriccomponents such as meters around the handlebar 31 issuppressed.

[0041] In a case where an opening is provided in theupper wall portion 85a of the discharged air regulatingmember 85, the discharged air of the radiator 66flowing out upward through the opening rises apart fromthe front surface 53a of the front inner cover 53, andthus rises while diffusing forward, rearward, right,and left. As a result, the discharged air of theradiator 66 easily flows toward the headlight 141 and the electric component 142, and easily has an influenceof heat on the headlight 141 and the electric component142.

[0042] In the present embodiment, by providing the rear opening 85e in the rear wall portion 85d of thedischarged air regulating member 85, the discharged airof the radiator 66 rises along the front surface 53a ofthe front inner cover 53, which causes the diffusion ofthe discharged air of the radiator 66 to be suppressed. Since many of the components, such as the headlight 141and various electric components, disposed at the upperfront portion of the vehicle are away from the frontsurface 53a, the discharged air of the radiator 66 isless likely to hit the headlight 141, the various electric components, and the like by causing thedischarged air of the radiator 66 to flow along thefront surface 53a.

[0043] In addition, the speed of the discharged air ofthe radiator 66 rising along the front surface 53a islowered by the front extending wall portion 143bserving as a baffle plate so as not to have aninfluence of heat on electric components and the like around the handlebar 31 provided at a high position atthe upper front portion of the vehicle.In addition, since the front extending wallportion 143b is disposed further upward than the lowerend 141a of the headlight 141. Hence, even in a case where some of the discharged air having bypassed thefront extending wall portion 143b rises toward thefront of the vehicle, the discharged air can beprevented from directly heading toward the headlight141, and an influence of heat on the headlight 141 can be suppressed.

[0044] As illustrated in Figs. 4 and 6, the radiatorair discharge structure for the motorcycle 10 as asaddle-type vehicle of a scooter type including a radiator 66 disposed behind a front wheel 13 and alower opening 61c discharging discharged air passingthrough the radiator 66 to a lower side of a vehiclebody includes, behind the radiator 66, a discharged airregulating member 85 that covers the radiator 66 andthat guides the discharged air of the radiator 66 tothe lower opening 61c. The discharged air regulatingmember 85 includes a rear opening 85e through whichsome of the discharged air of the radiator 66 can flow further upward than the radiator 66.With this configuration, by causing some of thedischarged air of the radiator 66 to flow upward, thedirection of the discharged air of the radiator 66 canfavorably be controlled, and an influence of heat on the electric components and the like can be suppressed.

[0045] Also, as illustrated in Figs. 1 and 6, the frontinner cover 53 that covers the rear surface of thefront portion of the vehicle is provided behind the radiator 66, and the rear opening 85e of the dischargedair regulating member 85 faces the front surface 53a ofthe front inner cover 53.With this configuration, the discharged air ofthe radiator 66 discharged from the rear opening 85e can flow upward along the front inner cover 53, and aninfluence of heat on the electric components and thelike disposed on the upper front portion of the vehiclecan be suppressed.

[0046] Also, as illustrated in Fig. 6, the front innercover 53 is inclined so that the upper portion islocated further forward than the lower portion.With this configuration, the discharged air of the radiator 66 can flow upward along the front innercover 53 more reliably, and an influence of heat on theelectric components and the like disposed on the upperfront portion of the vehicle can be suppressed.

[0047] Also, disposed is the front extending wallportion 143b that protrudes from the front surface ofthe front inner cover 53 toward the vehicle front andthat prevents the discharged air of the radiator 66from rising. With this configuration, the rise of thedischarged air of the radiator 66 can be delayed, andthe temperature of the discharged air of the radiator66 can be lowered before the discharged air of theradiator 66 reaches the vicinity of the handlebar 31 (see Fig. 1) at the upper portion. This makes itpossible to suppress an influence of heat on theelectric components and the like around the handlebar

[0048] The front extending wall portion 143b isprovided further upward than the lower end 141a of theheadlight 141 provided at the vehicle front portion.With this configuration, the front extending wall portion 143b can change the course of thedischarged air of the radiator 66 at a position furtherupward than the lower end 141a of the headlight 141,and the amount of the discharged air of the radiator 66flowing to the headlight 141 can be suppressed.

[0049] Also, as illustrated in Figs. 3 and 6, thedischarged air regulating member 85 includes the rearwall portion 85d opposed to the rear surface of theradiator, the rear wall portion 85d is disposed behind the inclined rear wall 61g extending upward anddiagonally forward from the rear edge portion of thelower opening 61c, and the rear opening 85e is disposedfurther upward than the inclined rear wall 61g.With this configuration, the discharged air of the radiator 66 can flow separately to the lower sideof the vehicle body and to the upper side of thevehicle body. As a result, the direction of thedischarged air of the radiator 66 can favorably becontrolled.

[0050] Also, as illustrated in Figs. 1, 4, and 6, thecenter frame 20 extends downward from the head pipe 18constituting the front end portion of the vehicle body frame 11, and is connected to the lower rear crossframe 94 located behind the inclined rear wall 61g andextending in the vehicle width direction, and the rearwall portion 85d is supported by the center frame 20.With this configuration, the discharged air regulating member 85 can be supported using a part ofthe vehicle body frame 11, and it is not necessary tospecially provide the support portion for thedischarged air regulating member 85. Also, since thecenter frame 20 is disposed behind the inclined rear wall 61g, the center frame 20 does not hinder the flowof the discharged air of the radiator 66 flowing to thelower side of the vehicle body, and the discharged airof the radiator 66 can smoothly flow to the lower sideof the vehicle body.

[0051] The embodiment described above is merely anembodiment of the present invention, and canarbitrarily be modified and applied within a range notdeparting from the spirit of the present invention.The present invention is applicable not only tothe motorcycle 10 but also to a saddle-type vehicleother than the motorcycle 10.Reference Signs List

[0052] Motorcycle (saddle-type vehicle)11 Vehicle body frame13 Front wheel18 Head pipe Center frame53 Front inner cover61c Lower opening (air discharge port)61g Inclined rear wall (inclined wall)15 66 Radiator85 Discharged air regulating member (discharged airwall)85d Rear wall portion85e Rear opening (opening)94 Lower rear cross frame (cross frame)141 Headlight (lighting device)143b Front extending wall portion (protective wall)

Claims

1. A radiator air discharge structure for a saddletype vehicle of a scooter type including a radiator (66) disposed behind a front wheel (13) and an air discharge port (61c) discharging discharged air passing through the radiator (66) to a lower side of a vehicle body, the radiator air discharge structure for a saddle-type vehicle characterized by comprising: behind the radiator (66), a discharged air wall (85) that covers the radiator (66) and that guides the discharged air of the radiator (66) to the air discharge port (61c), wherein the discharged air wall (85) includes an opening (85e) through which some of the discharged air of the radiator (66) can flow further upward than the radiator (66).

2. The radiator air discharge structure for a saddle-type vehicle according to claim 1, wherein a front inner cover (53) that covers a rear surface of a vehicle front portion is provided behind the radiator (66), and the opening (85e) of the discharged air wall (85) faces a front surface of the front inner cover (53).

3. The radiator air discharge structure for a saddle-type vehicle according to claim 2, wherein the front inner cover (53) is inclined so that an upper portion of the front inner cover is located further forward than a lower portion of the front inner cover.

4. The radiator air discharge structure for a saddle-type vehicle according to claim 2 or 3, wherein a protective wall (143b) that protrudes from the front surface of the front inner cover (53) toward a vehicle front and that prevents the discharged air of the radiator (66) from rising is disposed.

5. The radiator air discharge structure for a saddle-type vehicle according to claim 4, wherein the protective wall (143b) is provided further upward than a lower end of a lighting device (141) provided at the vehicle front portion.

6. The radiator air discharge structure for a saddle-type vehicle according to any one of claims 1 to 5, wherein the discharged air wall (85) includes a rear wall portion (85d) opposed to a rear surface of the radiator (66), the rear wall portion (85d) is disposed behind an inclined wall (61g) extending upward and diagonally forward from a rear edge portion of the air discharge port (61c), and the opening (85e) is disposed further upward than the inclined wall (61g).

7. The radiator air discharge structure for a saddle-type vehicle according to claim 6, wherein a center frame (20) extends downward from a head pipe (18) constituting a front end portion of a vehicle body 5 frame (11), and is connected to a cross frame (94) located behind the inclined wall (61g) and extending in a vehicle width direction, and the rear wall portion (85d) is supported by the center frame (20).