JP2002295352A - Ignition coil arrangement structure for scooter type vehicle - Google Patents

Abstract

(57) Abstract: In a scooter type vehicle having a low floor type floor 25, an engine 211 is arranged at the rear of the floor 25, and an engine ignition coil 2 is disposed at a lower front part of the floor 211.
26 were arranged. [Effect] The ignition coil for the engine can be separated from the engine, and the engine can be prevented from being thermally affected. As a result, the life of the engine ignition coil can be extended. Further, by arranging the engine ignition coil in the lower front portion of the floor, it is possible to effectively utilize the space below the low floor type floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition coil arrangement for a scooter type motorcycle.

[0002]

2. Description of the Related Art As an ignition coil arrangement structure of a scooter type motorcycle, for example, Japanese Patent Laid-Open No. 2000-310174, "Ignition coil unit mounting structure of swing type power unit" is known. According to the above-mentioned technology, according to FIGS. 1 and 2 of the publication, a swing type power unit 21 is swingably mounted around a swing shaft 92 on the body frame 11 side,
The ignition coil unit 25 is attached to the front of the engine 22 of the swing type power unit 21.

[0003]

For example, when the vehicle is a scooter-type vehicle having a large displacement, the engine generates a large amount of heat and the surroundings of the engine are covered with a body cover. In the ignition coil unit mounting structure, there is a possibility that the temperature around the ignition coil becomes high due to heat generated by the engine. Also, the ignition coil itself generates heat, and it is necessary to consider the heat generation of the ignition coil itself.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ignition coil arrangement structure for a scooter type vehicle, which is less susceptible to the thermal influence of the engine and can efficiently release the heat generated from the ignition coil itself.

[0005]

In order to achieve the above object, an ignition coil arrangement structure for a scooter type vehicle according to claim 1 is provided.
In a scooter-type vehicle having a low-floor type floor, an engine is disposed at a rear portion of the floor, and an ignition coil for the engine is disposed at a lower front portion of the floor.

For example, if the vehicle is a scooter-type vehicle having a large displacement, the engine generates a large amount of heat, and a structure in which the surroundings of the engine are covered with a vehicle body cover requires sufficient thermal consideration. . Therefore, the engine is disposed at the rear of the floor and the engine ignition coil is disposed at the front lower portion of the floor, so that the engine ignition coil is separated from the engine so that the engine is not affected by heat. As a result, the life of the engine ignition coil can be extended. In addition, by arranging the engine ignition coil in the lower front portion of the floor, the space below the low floor type floor is effectively used.

A second aspect of the present invention is characterized in that a radiator for cooling the engine is disposed in front of the floor, and an ignition coil for the engine is disposed before the radiator for cooling the engine. Arrange the engine cooling radiator in front of the floor,
By arranging the ignition coil for the engine before the radiator for cooling the engine, the engine is prevented from being thermally affected by the exhaust air from the radiator, and the heat generated by the ignition coil for the engine itself can be radiated.

According to a third aspect of the present invention, the radiator for cooling the engine is disposed in front of the floor, and a return pipe for returning the cooling water from the engine to the radiator for cooling the engine is passed leftward or rightward from the center of the vehicle width, and returned to the center of the vehicle width. The ignition coil for the engine is arranged at a position opposite to the tube. By disposing the engine ignition coil at a position opposite to the return pipe with respect to the center of the vehicle width, the engine ignition coil can be prevented from being thermally affected by the return pipe.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that "before", "after",
“Left”, “right”, “up”, and “down” follow directions seen from the driver. Also, the drawings should be viewed in the direction of reference numerals.

FIG. 1 is a left external view of a motorcycle employing an ignition coil arrangement structure for a scooter type vehicle according to the present invention. A motorcycle 10 as a scooter type vehicle is a vehicle having a low floor type floor 25. It indicates that. A body cover 20 that covers the entire body frame of the motorcycle 10 includes a front cowl 21 that covers a front part of the body frame and an upper part of the front wheel, an upper cover 22 that covers an upper opening of the front cowl 21, and a rear part of the front cowl 21. And a center cover 2 extending rearward from the rear end of the inner cover 23 and covering the longitudinal center of the body frame.
4, a low-floor floor 25 extending outward from the lower edge of the center cover 24 and resting on the driver's feet, and a low-floor floor 25.
A floor skirt 26 extending downward from the outer edge of the vehicle body; a rear side cover 27 extending rearward from the center cover 24 to cover the rear side of the vehicle body frame; And consisting of

The front cowl 21 has a transparent wind screen 31 on the upper part. The inner cover 23 includes a leg shield 91 that covers the front portion of the driver's leg. Further, the motorcycle 10 includes a handle 203 at a front portion of the vehicle body, and a seat 208 and a step holder 300 at a rear portion of the vehicle body.

The handle 203 is provided with grips 203a, 203
03a is relatively high and is pulled backward. The handle 203 was covered with the handle cover 101. The handle cover 101 includes a handle 203.
And a top handle cover 103 covering the top of the handle 203.

The seat 208 is a double seat including a seat front portion 208a where a driver sits and a seat rear portion 208b where an occupant sits. The step holder 300 is disposed adjacent to the rear portion of the center cover 24, and has a pillion step (step for occupant) 310 on which the occupant places his / her foot.
Is mounted so that it can be stored and exposed. In the figure, 261
Is a headlamp, 262 is a turn signal, 263 and 263 are mirrors, 264 is a front fender, 265 is a seat lock lock, 266 is a rear air spoiler, 267 is a tail lamp, 268 is a rear fender, 269 is a sub stand, and 320 is a main stand. is there. In addition, 271 and 2
Reference numeral 72 denotes a master cylinder,
The operation of 274 generates a braking hydraulic pressure.

FIG. 2 is a right external view of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention. The motorcycle has a meter panel 92 above the front cowl 21 and behind the windscreen 31. Is shown.
As is clear from the above description, the windscreen 31, the leg shield 91 and the meter panel 9
2 can be provided. Further, this figure shows that the step holder 300 including the pillion step 310 is also arranged on the right side of the motorcycle 10. 275 is an exhaust silencer.

FIG. 3 is a side sectional view of the motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention, and shows the motorcycle 10 viewed from the left side. The motorcycle 10 includes a body frame 110 and a body frame 1.
A front fork 201 attached to the head pipe 111 so as to be able to swing left and right;
, The handle 203 connected to the front fork 201, the engine 211 mounted on the rear of the body frame 110, and the power capable of swinging up and down around the crankshaft of the engine 211 independently of the engine 211. A transmission mechanism 212, a rear wheel 205 attached to the rear part of the power transmission mechanism 212, a rear cushion unit 206 in which the rear end of the power transmission mechanism 212 is suspended from the body frame 110, and a storage attached to the upper rear part of the body frame 110 This is a scooter-type vehicle having a box 207 and the above-mentioned seat 208 which is disposed on the storage box 207 and attached to be openable and closable.

The front fork 201 is a gate-shaped fork disposed below the head pipe 111. The upper part of the front fork 201 and the head pipe 111
Is covered with a front cowl 21. Engine 21
Reference numeral 1 denotes a water-cooled two-cylinder engine in which two left and right cylinder heads 215 are slightly inclined forward and upward and are arranged substantially horizontally. Power transmission mechanism 212 is a belt converter continuously variable transmission with a centrifugal clutch that transmits the power of engine 211 to rear wheel 205.

The storage box 207 is a box that is elongated in the vehicle longitudinal direction so that two helmets Hf and Hr can be stored in the front and rear.
a and an upper box 207b superimposed on the rear upper part of the lower box 207a. In the figure, reference numeral 281 denotes an air cleaner arranged on the side of the storage box 207;
2 is a connecting tube, 283 is a storage box 2
Reference numeral 07 denotes an air chamber, 284 denotes a throttle valve, 285 denotes an inlet pipe, and 286 denotes a battery.

FIG. 4 is a perspective view of a body frame adopting the ignition coil arrangement structure of the scooter type vehicle according to the present invention. The body frame 110 includes a front frame 112 connected to a head pipe 111, and a front frame 112.
Left and right rear frames 11 extending rearward from the rear
5, 115 is a double cradle-type integrated frame which is connected by welding. The head pipe 111 has a cowl stay bracket 111a.

The front frame 112 includes a pair of left and right upper frames 113 extending rearward and downward from the head pipe 111.
113, and the pair of upper frames 11
Below the head pipe 111, a pair of left and right down tubes 114, 114 are suspended downward from the head pipe 111, and the lower ends of the pair of down tubes 114, 114 are extended rearward to the lower ends of the pair of upper frames 113, 113. It is connected and further extended rearward and upward. Since the front frame 112 has such a configuration, it is possible to provide a substantially triangular space Sp1 in side view, which is surrounded by the pair of upper frames 113, 113 and the pair of down tubes 114, 114.

Between the front end of the left rear frame 115 and the front end of the right rear frame 115, a portal-type first cross member 121 is bridged from the front, and the left upper frame 113
The second cross member 122 is bridged between the lower end of the upper frame 113 and the lower end of the right upper frame 113, and the first bracket 123 for the engine is coupled to the center position of the second cross member 122 in the vehicle width.

A third cross member 124 is bridged between the rear end of the horizontal portion of the left down tube 114 and the rear end of the horizontal portion of the right down tube 114. A second engine bracket 125 is connected to the center of the width, and the left and right third engine
The brackets 126 are connected.

A pair of left and right rear frames 115, 115
Is a member having a vertically long cross-sectional shape, one end of which is joined to the middle of the pair of left and right upper frames 113, 113 and the other end is extended rearward. Here, the “vertical cross-sectional shape” refers to a cross-sectional shape whose vertical dimension is larger than its horizontal dimension. Specifically, the rear frames 115, 115 are formed of square pipes having a vertically long rectangular cross section.

The body frame structure comprises three cross members 131-131 between a pair of right and left rear frames 115,115.
133 is detachably mounted. Specifically, between the left and right rear frames 115, 115, the front rear cross member 131, the middle rear cross member 132
And the rear rear cross member 133 is laid in this order from the front. These three cross members 131
133 are bolted to the upper surfaces of the rear frames 115, 115 so as to overlap with each other. Square pipe rear frame 115,1
Since it is 15, it is easy to mount it with the three cross members 131 to 133 mounted thereon.

The front rear cross member 131 is a portal-shaped member as viewed from the front, and extends a rear open U-shaped stay 131a in a plan view from the left and right standing portions to the front.
1a, a seat hinge supporting portion 131b is connected to the front end of the U-shaped stay 131a, and an extension member 131c extends forward from the front end of the U-shaped stay 131a.
The cross member 121 is bolted. The middle rear cross member 132 is a bar-shaped member, and the rear rear cross member 133 is a front open U-shaped member in plan view.

Further, left and right rear frames 115, 115
The left and right cushion brackets 134, 13
4 between the rear portions of the left and right rear frames 115, 115.
After that, the left and right transport hooks 136 and 136 are connected to the lower rear cross member 135.

This figure shows the vehicle body frame 110
, A pair of left and right floor support stays 141 and 141 and an under frame 143 are detachably attached to the left and right, and a plurality of headed pins 144... Specifically, the left and right floor support stays 141 and 141 are provided on the low floor type floor 25.
(See FIG. 1), which are brackets for the left and right down tubes 114, 114.
It is a member to be bolted to 46,146. The right floor support stay 141 connects the engine ignition coil 226 to the lower end of the front end via a stay 142, and bolts 227, 227.
It is a member that is detachably attached. The ignition coil 226 attached to the lower part of the down tube 114 will be located lower than the low floor type floor 25.

The under frame 143 is a member which is hung between horizontal portions of the left and right down tubes 114, 114 so as to be hung.
4 are bolted to the four brackets 146, 146, 147, 147. Such an underframe 14
Reference numeral 3 denotes left and right side members 143a, 143a extending along the horizontal portions of the down tubes 114, 114, a central cross member 143b extending between central longitudinal portions of the side members 143a, 143a, and a side member 143.
a, cross member 1 spanned between the rear ends of 143a
43c. Reference numeral 148 is a hook for hooking a heat shield plate for a fuel tank described later.

The headed pins 144 are members for retaining a heat shield plate for a fuel tank to be described later, and include left and right upper frames 113 and 113 and left and right down tubes 11.
A total of six are provided on the outer side of the first and fourth cross members 114 and on the left and right front portions of the first cross member 121. In the figure, 151 is a front cross member, and 152, 152 and 153 are stays.

FIG. 5 is a left side view in which an engine, a power transmission mechanism and a seat are mounted on a vehicle body frame employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention. 11
5 and 115, an engine 211 and a power transmission mechanism 212 are arranged. This shows that 211 has been attached.

More specifically, a pair of upper frames 113, 113, a pair of down tubes 114, 114 and a pair of rear frames 1 are provided at the rear of the front frame 112.
A space Sp having a substantially triangular shape in a side view surrounded by 15, 115
2, a cylinder head 215 and a head cover 216 of the engine 211 are disposed in the space Sp2, a lower front portion of the engine 211 is mounted on the first bracket 123 for the engine, and a lower rear portion of the engine 211 is mounted on the second bracket 125 for the engine. And the upper rear part of the engine 211 is mounted on the third engine brackets 126, 126. The front and middle rear cross members 131 and 132
It is arranged above the engine 211.

Further, FIG. 3 shows that (1) the rear end of the power transmission mechanism 212 is suspended on the left and right cushion brackets 134, 134 via the left and right rear cushion units 206, 206, and (2) the front rear Cross member 13
Reference numeral 1 indicates that it also serves as a member for supporting the seat hinge 208c of the openable / closable seat 208. Thus, the rear cushion unit 20 is
6,206 as well as the sheet 208 can be supported.

FIG. 6 is a cross-sectional side view of a lower portion of a front portion of a motorcycle employing an ignition coil arrangement structure for a scooter type vehicle according to the present invention. FIG. , An engine 211 is arranged at the rear of the low floor type floor 25, an engine cooling radiator 221 is arranged at the front of the floor 25, and an ignition coil 226 is arranged at the front lower part of the floor 25. 221 indicates that the fuel tank 230 has been arranged. That is, the radiator 221 is arranged before the engine 211 and before the left and right down tubes 114, 114 (only the left is shown in this figure; the same applies hereinafter).

A return pipe 222 for returning the coolant from the engine 211 to the radiator 221 is a hose that passes from the center of the vehicle width to the left (to the front in the figure). Specifically, the return pipe 222 connected to the liquid return port of the engine 211 extends along the horizontal part of the left down tube 114 and the hanging part at the front thereof, and the upper header 221 a of the radiator 221.
Connect to

On the other hand, from the radiator 221 to the engine 21
The supply pipe 223 that supplies the cooling liquid to the hose 1 is a hose that extends from the center of the vehicle width to the right (on the opposite side in the figure). Specifically, the supply pipe 223 connected to the lower header 221b of the radiator 221 extends rearward along the horizontal portion of the right down tube 114 (on the opposite side in the figure) and connects to the liquid inlet of the engine 211. 224 is a radiator fan.

The ignition coil 226 is characterized in that it is disposed at the right position (on the opposite side of the drawing) opposite to the return pipe 222 with respect to the center of the vehicle width and before the radiator 221. In this way, the ignition coil 226 is connected to the (1) engine 211
(2) Radiator 22 at a position not affected by heat from
(3) It can be arranged in a position where it is not affected by the heat of the exhaust air from (1) and where it is not affected by the heat from the return pipe 222.

That is, in the scooter type vehicle having the low floor type floor 25 according to the present invention, the ignition coil arrangement structure of the scooter type vehicle has the engine 211 at the rear of the floor 25.
, And an ignition coil 226 for the engine is arranged below the front part of the floor 211.

For example, when the vehicle is a scooter type vehicle having a large displacement, the engine generates a large amount of heat, and a structure in which the surroundings of the engine are covered with a vehicle body cover requires sufficient thermal consideration. . Therefore, by disposing the engine 211 at the rear of the floor 25 and disposing the ignition coil 226 at the lower front part of the floor 25, the ignition coil 226 is separated from the engine 211 so as not to be affected by the heat of the engine 211. . As a result, the life of the engine ignition coil 226 can be extended. In addition, floor 25
By arranging the ignition coil 266 for the engine in the lower front part, the space below the low floor type floor 25 can be effectively used.

Further, the ignition coil arrangement structure of the scooter type vehicle according to the present invention has an engine cooling radiator 221 arranged in front of the floor 25 and an engine ignition coil 226 arranged before the engine cooling radiator 221. The radiator 211 for cooling the engine is arranged in front of the floor 25 which can be said to be the same as the radiator 221 for the engine. Heat generated by the engine ignition coil 226 itself can be radiated.

Further, in the scooter type vehicle according to the present invention, the ignition coil arrangement structure includes an engine cooling radiator 221.
Is disposed in front of the floor 25 and a return pipe 2 for returning cooling water from the engine 211 to the radiator 221 for cooling the engine.
It can also be said that the engine ignition coil 226 is disposed at a position opposite to the return pipe 222 with respect to the center of the vehicle width. By disposing the engine ignition coil 226 at a position opposite to the return pipe 222 with respect to the vehicle width center, the engine ignition coil 2
26 can be prevented from being thermally affected by the return pipe 222.

The fuel tank 230 includes a pair of left and right upper frames 113 and 113 and a pair of right and left down tubes 1.
A substantially spurious space portion Sp <b> 1 in side view surrounded by 14 and 114.
To place. Such a fuel tank 230 has a space S
In order to effectively utilize p1, the upper frame 113, 1 when viewed from the side of the vehicle body as shown in FIG.
13 and a container whose front upper portion is tapered along the down tubes 114, 114. Further, the fuel tank 230
Lower the lower tube 114,1 to increase the capacity.
Extend below 14. Down tube 114, 114
The fuel tank 230 can be protected by covering the lower portion of the fuel tank 230 that extends further downward with the detachable underframe 143. Body frame 110
After the fuel tank 230 is inserted into the space Sp1 from below and mounted, the underframe 1 is attached to the body frame 110.
43 will be attached.

FIG. 7 is a perspective view of the surroundings of the fuel tank of a motorcycle employing the arrangement of the ignition coil of the scooter type vehicle according to the present invention. The fuel tank 230 is a container in which the lower front half portion 231 of the lower front half and the upper half portion 232 of the rear upper half are overlapped with each other and the flange 233 is joined thereto. Mouth 234,
Breather sub-tank 235 and fuel supply pump 236
Is provided. Specifically, a breather sub-tank 235, a fuel supply port 234, and a fuel supply pump 236 are arranged in this order above the fuel tank 230 from the upper front to the lower rear.

The flange 233 has one mounting hole 233a at the upper central portion, and has two mounting holes 233b (only one on the left is shown in this figure) on the lower left and right. The filler port 234 includes a closed cap 237. The breather sub-tank 235 is
A small container that communicates with the inside.

The heat shielding structure of the fuel tank is
1, reference numerals 241 and 24 denote heat shield plates for preventing the influence of heat from the return pipe 222 and the supply pipe 223 (see FIG. 6).
The heat shield plates 241, 242, 243, 243 are divided into four members denoted by reference numerals 2, 243, 243, and these divided heat shield plates 241, 242, 243, 243 are arranged on the front, rear, left, and right surfaces of the fuel tank 230. The divided heat shield plates 241, 242, 243,
243, the degree of thermal influence from the engine 211 and the radiator 221 is taken into consideration, and the fuel tank 23
According to the shape of each surface of 0, it can be arbitrarily and minimized. As a result, the heat shield plates 241, 24
2, 243, 243 are relatively small and very easy to manufacture. In addition, since the molding die can be small and the material can be small, it can be manufactured at low cost.

The front heat shield plate 241 that covers the front surface of the fuel tank 230 is a resin sheet made of a hard resin or the like that has a substantially rectangular shape when viewed from the front. Since the front heat shield plate 241 is made of a resin sheet, the shape is extremely simple, and it can be manufactured at lower cost.

The rear heat shield plate 242 for covering the rear surface of the fuel tank 230 is a generally rectangular rubber sheet having two hook holes 242a, 242a at the top and one hook at the bottom. It has a hole 242b. The left and right heat shield plates 243 and 243 that cover the lower half of the left side and the lower half of the right side of the fuel tank 230 are rubber sheets having two hook holes 243a and 243a at the top. The left and right heat shield plates 243 and 243 are provided between the fuel tank 230 and the return pipe 222 and the supply pipe 223 (see FIG. 6). Thus, the return pipe 222 and the supply pipe 2
23 is prevented from being transmitted to the fuel tank 230. Thus, the rear heat shield 242 and the left and right heat shields 24
Since 3,243 is a rubber sheet, it can be freely deformed and can be freely arranged according to the space around the fuel tank 230. Moreover, the arrangement can be made easily by effectively utilizing the narrow space around the fuel tank 230. Further, since the rear heat shield plate 242 and the left and right heat shield plates 243 and 243 are formed of sheets, the shape is extremely simple, and the device can be manufactured at lower cost.

Here, returning to FIG. 6 once, the explanation will be continued. The front heat shield plate 241 is disposed between the down tube 114 hanging downward from the head pipe 111 and the fuel tank 230, and is detachably attached to the front cross member 151, thereby also serving as a wind guide for the radiator 221. It is a member. For this reason, the upper end of the front heat shield 241 is curved toward the upper side of the radiator 221, and the lower end of the front heat shield 241 extends below the radiator 221. As described above, the front heat shield plate 241 is connected to the down tube 114 and the fuel tank 23.
0, the front heat shield plate 241 can be easily attached to the down tube 230. Therefore,
The mounting workability of the front heat shield plate 241 is good.

The rear heat shield plate 242 has a pin 1
By hooking on the hook 44 and hooking the lower portion on the hook 148, it can be detachably attached to the body frame 110. Also, the left and right heat shield plates 243, 243
(Only the left is shown in this figure.)
4, it can be detachably attached to the body frame 110.

As is apparent from the above description, since the heat shield plates 241, 242, 243, and 243 are divided, each of the heat shield plates 241, 242, 242, 242, 242, 243 and 243 can be freely attached to the body frame 110, and the attachment workability is good.

This figure shows that the front of the radiator 221 is covered with the front lower cover 93, and the underside of the radiator 221 and the fuel tank 230 is covered with the under cover 94. The front lower cover 93 extends to the front end of the under cover 94, and has a plurality of radiator ventilation holes 93a on the front surface. The under cover 94 has an exhaust port 94 a below the fan 224 to exhaust the exhaust air from the radiator 221 to the outside.
The exhaust port 94a is provided with a large number of louvers (rectifying plates) 94b which face obliquely rearward.

Further, this figure shows a refueling lid 330 that is opened when supplying fuel to the fuel tank 230 through the refueling port 234, and an inspection lid 360 that is opened when inspecting a spark plug (not shown) of the engine 211. To
This shows that the vehicle body cover 20 is provided.

FIG. 8 is a view taken in the direction of the arrow 8 in FIG. 6, and shows a structure in which the fuel tank 230 is mounted on the vehicle body frame 110. The body frame 110 has an upper bracket 154 spanned between left and right stays 152, 152, and lower brackets 155, 155 attached to left and right down tubes 114, 114. By bolting the upper portion of the flange 233 of the fuel tank 230 to the upper bracket 154 and bolting the lower portion of the flange 233 to the lower brackets 155 and 155, the fuel tank 230 can be detachably attached to the vehicle body frame 110. . The upper portion of the flange 233 is tightly bolted to the upper bracket 154.

FIG. 9 is a sectional view taken along the line 9-9 in FIG. 8, and shows that the lower portion of the flange 233 is attached to the lower bracket 155 via a rubber bush 156 with a bolt / nut 157, thereby performing rubber mounting. 158 is a color.

FIG. 10 is a front sectional view of a motorcycle employing an ignition coil arrangement structure of a scooter type vehicle according to the present invention. (1) Body frame 110 and fuel tank 23
0 is covered by the center cover 24, the left and right floors 25, 25, the left and right floor skirts 26, 26, and the under cover 94; and (2) the left and right down tubes 1
14 and 14 show that the floors 25 and 25 are bolted to the floor support stays 141 and 141 via the floor support stays 141 and 141, respectively.

As described above, the left and right heat shield plates 243 and 243 hung on the headed pins 144.
It hangs down along the side of 30 and extends through the gap between the side of the fuel tank 230 and the down tubes 114, 114. As described above, since the upper portions of the left and right heat shield plates 243 and 243 are merely hooked to the vehicle body frame 110, the mounting is easy. The upper part of the left and right heat shield plates 243, 243
The lower frames are attached to the outer surfaces of the upper frames 113 and 113, and the lower portions thereof
2. It is arranged inside the supply pipe 223. Therefore, the heat of the return pipe 222 and the supply pipe 223 can be prevented from reaching the fuel tank 230.

FIG. 11 is a diagram showing the operation around the radiator of the motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention. The fan 224 behind the radiator 221 sucks the wind from the front of the radiator 221. I do. For this reason, the outside air becomes a cooling wind (including a running wind at the time of running the vehicle) Fc, enters the radiator air inlets 93a, ..., flows through the cooling air passage, and enters the radiator 221.

The hot air (discharged hot air) Fh that has passed through the radiator 221 is discharged from the fan 224, guided by the front heat shield plate 241 also serving as a wind guide, and changes its flow downward. Spills out of the building. Since the direction of the hot air Fh passing through the radiator 221 is changed by the front heat shield plate 241, the hot air F to the engine 211 and the fuel tank 230 behind the radiator 221 is changed.
h can be prevented. Also, the front heat shield plate 2
Since 41 also serves as a wind guide, there is no need to provide another different wind guide.

FIG. 12 is a schematic view of a fuel tank of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention. The fuel tank 230 has a tray 251 surrounding the fuel supply port 234, 251 is connected to one end 252a of a fuel discharge hose (drain hose) 252, and the other end 252b of the fuel discharge hose 252 is open to the atmosphere. As described above, the breather sub-tank 235 communicates with the inside of the fuel tank 230. A breather hose 253 is provided in the breather sub tank 235.
Is connected, and the other end of the breather hose 253 is bifurcated. 254 is a breather hose 2
This is a T-joint that branches the other end of 53.

FIG. 13 is a rear cross-sectional view of a fuel tank of a motorcycle employing an ignition coil arrangement structure for a scooter type vehicle according to the present invention, in which a tray 251 has a flat bottom 251a. This is a fuel tray in which a portion 251b is integrally formed. The cylinder part 251b is connected to the fuel filler 234
The tray 251 can be attached by sandwiching the upper and lower surfaces of the bottom 251 a between the bottom 24 b of the concave portion 24 a provided in the fueling portion of the center cover 24 and the upper surface 230 a of the fuel tank 230. Therefore, members such as bolts for mounting the tray 251 are not required, and mounting is easy. Reference numeral 24c is a filler hole.

FIG. 14 is a right side external view of a motorcycle fuel tank employing the pillion step of the motorcycle according to the present invention. A tray 251 has a discharge port 25 extending rearward and downward.
1c. One end 252a of a fuel discharge hose 252 is connected to the discharge port 251c, the fuel discharge hose 252 is hung down along the right upper frame 113, extends to the rear right end of the under cover 94, and is connected to the other end 252.
Turn b down. While fuel is being supplied to the fuel tank 230, the fuel spilled around the fuel supply port 234 is supplied to the tray 251.
And discharged to the outside via a fuel discharge hose 252. Therefore, there is no fear that the spilled fuel will wet the outer surface of the fuel tank.

On the other hand, the breather sub-tank 235 has a breather port 235a extending rightward. One end 253a of the breather hose 253 is connected to the breather port 235a, and the breather hose 253 is connected to the fuel tank 23.
Hang it down along the right side of 0. That is, when the breather hose 253 passes through the space between the upper frame 113 and the down tube 114 along the fuel tank 230 when the fuel tank 230 is viewed from the front, and extends to the rear right end of the under cover 94. , Branched into two branches. The other end 253b of the branch extends to the rear left end of the under cover 94 and is open to the atmosphere, and the other end 253c of the branch temporarily extends upward along the rear surface of the fuel tank 230. It extends rearward along the left upper frame 113 and opens to the atmosphere. Therefore, even if one of the two other ends 253b and 253c is clogged, the other can secure the breather function.

In the embodiment, in FIG. 6, the ignition coil 226 may be arranged at a position opposite to the return pipe 222 with respect to the center of the vehicle width. For example, the return pipe 222 is shifted rightward from the center of the vehicle width. In the case of passing, it is only necessary to arrange it on the left side.

[0062]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, in the scooter type vehicle having the low floor type floor, the engine is arranged at the rear part of the floor, and the engine ignition coil is arranged at the lower front part of the floor.
The engine ignition coil can be separated from the engine,
It can be protected from thermal effects of the engine. As a result, the life of the engine ignition coil can be extended. Further, by arranging the engine ignition coil in the lower front portion of the floor, it is possible to effectively utilize the space below the low floor type floor.

According to the second aspect, the radiator for cooling the engine is disposed in front of the floor, and the ignition coil for the engine is disposed before the radiator for cooling the engine, so that the radiator is not thermally affected by the exhaust air from the radiator. The heat generated by the engine ignition coil itself can be dissipated.

According to a third aspect of the present invention, the radiator for cooling the engine is disposed in front of the floor, and a return pipe for returning the cooling water from the engine to the radiator for cooling the engine is passed leftward or rightward from the center of the vehicle width and returned to the center of the vehicle width. Since the engine ignition coil is disposed at a position opposite to the tube, the engine ignition coil can be prevented from being thermally affected by the return tube.

[Brief description of the drawings]

FIG. 1 is a left external view of a motorcycle employing an ignition coil arrangement structure for a scooter type vehicle according to the present invention.

FIG. 2 is a right external view of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

FIG. 3 is a side cross-sectional view of a motorcycle employing an ignition coil arrangement structure for a scooter type vehicle according to the present invention.

FIG. 4 is a perspective view of a vehicle body frame adopting the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

FIG. 5 is a left side view of an engine, a power transmission mechanism, and a seat mounted on a vehicle body frame employing an ignition coil arrangement structure of a scooter type vehicle according to the present invention.

FIG. 6 is a side sectional view of a lower front portion of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

FIG. 7 is a perspective view around a fuel tank of a motorcycle adopting the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

8 is a view taken in the direction of arrow 8 in FIG. 6;

9 is a sectional view taken along line 9-9 in FIG.

FIG. 10 is a front sectional view of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

FIG. 11 is an operation diagram around a radiator of a motorcycle adopting the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

FIG. 12 is a schematic view of a fuel tank of a motorcycle employing an arrangement of an ignition coil for a scooter type vehicle according to the present invention.

FIG. 13 is a rear cross-sectional view of a fuel tank of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention, around a fuel filler port.

FIG. 14 is a right external view of a fuel tank of a motorcycle employing the ignition coil arrangement structure of the scooter type vehicle according to the present invention.

[Explanation of symbols]

10: scooter type vehicle (motorcycle), 25: low floor type floor, 211: engine, 221: radiator, 222
... return pipe, 226 ... ignition coil.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3G019 KC10

Claims (3)

[Claims] 1. A scooter-type vehicle having a low-floor type floor, wherein an engine is disposed at a rear portion of the floor, and an engine ignition coil is disposed at a lower front portion of the floor. Coil arrangement structure. 2. An ignition coil arrangement for a scooter-type vehicle according to claim 1, wherein an engine cooling radiator is arranged in front of said floor, and said engine ignition coil is arranged before said engine cooling radiator. Construction. 3. A radiator for cooling the engine is disposed in front of the floor, and a return pipe for returning cooling water from the engine to the radiator for cooling the engine is passed leftward or rightward from the center of the vehicle width and returned to the center of the vehicle width. The ignition coil arrangement structure for a scooter type vehicle according to claim 1, wherein the engine ignition coil is arranged at a position opposite to a pipe.