JP2000008850A - Arranging structure of air intake system control valve for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a small vibration, prevent damage in a mounting part, also eliminate necessity for even a thermal countermeasure in not so a high degree. SOLUTION: In this arranging structure, a unit swing type engine 2 is arranged vertically swivelably with a pivot shaft 50 provided in a front part thereof serving as the center relating to a car body, also a rear wheel 4 is supported between a transmission case extended rearward of the engine 2 and a rear arm 90, on the other hand, an air intake system control valve 88 introducing the outside air by a prescribed amount in an exhaust passage to burn unburned gas is arranged. Here, the air intake system control valve 88 is fixed to the rear arm 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorcycle in which a unit swing type engine is disposed so as to be able to swing up and down with respect to a vehicle body, and more particularly, to burn unburned gas by introducing a predetermined amount of outside air into an exhaust passage. The present invention relates to a motorcycle air intake system control valve provided with an air intake system control valve (hereinafter, referred to as an "AIS control valve").

[0002]

2. Description of the Related Art Conventionally, a scooter-type vehicle as a motorcycle is provided with a unit swing type engine which is vertically swingable with respect to a vehicle body, and a transmission case and a rear arm extended behind the unit swing type engine. The rear wheel is supported between the two.

In this scooter type vehicle, an AI that introduces a predetermined amount of outside air into an exhaust passage and burns unburned gas is used.
An S control valve is provided.

The AIS control valve detects the intake negative pressure on the intake side and operates the valve body to adjust the amount of outside air introduced. The AIS control valve is mounted across the rear arm and the crankcase. , Attached to the muffler.

[0005]

However, in such a conventional device, in which the AIS control valve is disposed so as to extend between the rear arm and the crankcase,
Since the natural frequencies of the rear arm and the crankcase are different from each other, there is a possibility that the mounting portion of the AIS control valve may be damaged. Further, in the case where the AIS control valve is attached to the muffler, sufficient heat countermeasures must be taken since heat is directly transmitted from the muffler. Moreover, a relatively heavy muffler is attached to the unit swing type engine or the rear arm so as to be hung, and easily vibrates due to the influence of exhaust pressure and the like, which may adversely affect the AIS control valve.

Accordingly, an object of the present invention is to provide an air intake system control valve disposing structure for a motorcycle in which vibration is small and damage to the mounting portion can be prevented, and heat measures are not so required.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a unit swing type engine swings up and down around a pivot shaft provided at a front portion thereof with respect to a vehicle body. The rear wheel is supported between the rear arm and a transmission case extended rearward of the unit swing type engine, and a predetermined amount of outside air is introduced into an exhaust passage to burn unburned gas. In a motorcycle air intake system control valve arrangement structure provided with an air intake system control valve to be arranged, the air intake system control valve has a motorcycle air intake system control valve arrangement structure fixed to the rear arm. It is characterized by having done.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a protector for covering an exhaust device is provided below the air intake system control valve, and the protector and the air intake system control valve are provided. A space is formed between the valve and the valve.

[0009]

Embodiments of the present invention will be described below.

FIGS. 1 to 49 show an embodiment of the present invention. In the embodiment of the present invention, an entire scooter type vehicle including an inventive portion will be described.

The scooter type vehicle according to this embodiment is generally a vehicle body frame 1 (hereinafter referred to as "frame 1").
A unit swing type engine 2 is connected to be vertically swingable, a front wheel 3 is disposed at a front portion of the frame 1, and a rear wheel 4 is supported at a rear portion of the unit swing type engine 2. .

As shown in FIGS. 10 and 11, the frame 1, which is the skeleton, is formed by connecting a plurality of pipes, and a plurality of covers are mounted around the frame 1.

More specifically, first, as shown in FIG. 6, a footrest board 6 as a "center cover" disposed at the center of the frame 1 in the vehicle front-rear direction is used as a reference. , A leg shield 7 as an "other cover", a front panel 8 and a front molding 9 are sequentially attached, and a side cover 11 as an "other cover" is provided on the rear side of the footrest board 6.
A tandem foot step 12 is attached, and a side molding 13 is provided on the side of the footrest board 6.
Is attached. A lower cover 58 is provided below these.

As shown in FIG. 12, the footrest board 6 has a reference bolt hole 6a on the left side when viewed from the rear of the vehicle.
A long hole 6b long in the vehicle width direction is provided on the opposite side of the reference bolt hole 6a with respect to the center line, and further, a front side of the reference bolt hole 6a and the long hole 6b is provided with a fool hole 6c,
6d are formed.

A bolt (not shown) projecting from the stay 1a shown in FIGS. 3 and 10 is inserted into the reference bolt hole 6a and screwed into the reference bolt hole 6a.
Since a and the screw are set to have substantially the same diameter, the footrest board 6 is positioned in the left-right and front-rear directions. However, positioning in the rotation direction about the reference bolt hole 6a is not performed.

Similarly, the slot 6b and the loose insertion holes 6c, 6
A bolt (not shown) is inserted through each of the stays 1b, 1c, and 1d and screwed. The bolts are screwed into the elongated holes 6b to perform the above-described positioning in the rotation direction.

In this way, the footrest board 6 is attached to the frame 1 at a predetermined position.

Next, with reference to the footrest board 6, the legrest 7 is fixed to the frame 1 by screwing the leg shield 7 to the front edge of the footrest board 6 with the front edge thereof aligned. The installation of the leg shield 7 in this case is as follows.
Although not shown, even if a slight displacement occurs by inserting a screw into the play insertion hole, the displacement is absorbed.

Then, the stay 15 is temporarily fastened to the bracket 1e fixed to the frame 1 so as to move, and the front panel 8 is temporarily placed, and the front panel 8 and the headlight 16 are temporarily fastened to the stay 15. afterwards,
The headlight 16 is screwed to the front panel 8 and the front panel 8 is connected to the leg shield 7.
Then, the leg shield 7 is screwed with reference to the leg shield 7 (see FIG. 13).

Next, the stay 15, the headlight 16, and the front panel 8 are fully tightened, and then the stay 15 and the bracket 1e are fully tightened.

On the other hand, the side cover 11 on the rear side of the footrest board 6 is also arranged so as to absorb the positional shift through a play insertion hole or the like (not shown) in a state where the side cover 11 is aligned with the footrest board 6 as a reference.

As described above, since other covers are sequentially assembled on the front side or the rear side with the footrest board 6 as a reference, the front or rear end is more assembled than on the basis of the front or rear end. The error is small, and the assembling accuracy is improved.

On the other hand, a handle 18 is rotatably supported by a head pipe 1f formed at the front end of the frame 1, and the handle 18 is covered with a handle cover 19. The handle cover 19 is formed in a substantially V shape along the handle 18, and various harnesses 21 and brake wires 22 for rear wheel disc brakes are routed in the handle cover 19 (see FIG. 14).

The brake wire 22 is inserted into a rigid bent pipe 23 and a resin pipe 24. The bent pipe 23 is disposed near the brake handle 25, and an end of the resin pipe 24 is fitted to and connected to an end of the bent pipe 23.

When the brake wire 22 is pulled by the operation of the brake handle 25, the wire 22 moves relatively in the pipes 23 and 24, and the brake operation of the disc brake is performed.

By inserting the brake wire 22 into the rigid bent pipe 23, the V
The brake wire 22 can be routed even in the handle cover 19 which is shaped like a letter and has a large bend.
Appearance quality can be ensured without exposing 2 etc.

Further, by forming the handle cover 19 in a V-shape, as shown in FIG. 15, the visibility of the instruments 26 such as a speedometer can be ensured by the driver, and the appearance quality can be improved. Can be done.

On the other hand, in front of the instruments 26, FIG.
5, as shown in FIGS. 16 and 17, the meter visor 2
8, a screen 29 larger than the meter visor 28 is disposed in front of the meter visor 28 with a certain gap c.

The meter visor 28 is composed of a first meter visor 30 and a second meter visor 31, as shown in FIG. 17 and the like. The first and second meter visors 30 and 31 are assembled by being fixed with screws 32.

A recess 31a is formed at the center of the outer surface of the second meter visor 30 in the vehicle width direction along the vertical direction.

As shown in FIG. 16, the lower end 29a of the screen 29 is screwed to and attached to the second meter visor 31, and has a horizontal section curved substantially concentrically with the second meter visor 31. Have been.

The meter visor 31 and the screen 29 to which the instruments 26 are attached are sub-assembled to be attached to and detached from the frame 1, the leg shield 7, and the like. By doing so, the workability of attaching and detaching the instruments 26 and the like can be improved, and the valve replacement of the speedometer and the like can be easily performed.

Since the second meter visor 30 has a recess 31a on the gap c side, the gap c between the second meter visor 30 and the screen 29 is widened. And the recess 31a is formed at the center in the vehicle width direction, that is, at the deepest portion of the gap c. It is also possible to easily clean the rear surface of the screen 29 corresponding to both sides.

On the front side of this scooter type vehicle, a loading hook 35 for suspending a load is disposed above a front trunk 36 (see FIGS. 18, 19 and 20).

That is, the front trunk 36
Opening / closing lid 36b on trunk body 36a having luggage storage room
The opening / closing lid 36b has a lower end portion 36c rotatably attached thereto via a hinge.
Thereby, the trunk body 36a is opened and closed, and a seal member 36e is disposed in an annular shape around the opening edge of the trunk body 36a, and sealing is performed by abutting the peripheral edge of the opening / closing lid 36b. It has become. In addition, a lock device 36d is disposed above the opening / closing lid 36b.

The unloading hook 35 is disposed above the locking device 36d of the opening / closing lid 36b. The unloading hook 35 has a mounting portion 35a fixed to the vehicle body side, and a hook-shaped hook portion 35b extending rearward from the mounting portion 35a.

The mounting portion 35a is provided with the leg shield 7
Is inserted into the mounting recess 7a formed in
Stay 1g fixed to frame 1 by nut 38
Together with the leg shield 7.

The hook position P of the hook portion 35b
Protrudes rearward from the general surface of the opening / closing lid 36b, so that when a load is hung on the hook 35b,
The load of the load does not directly act on the opening / closing lid 36b, and the seal member 36e and the like between the opening / closing lid 36b and the trunk body 36a are hardly damaged.

Since the unloading hook 35 is disposed near the upper side of the locking device 36d, the leg shield 7 around the portion where the locking device 36d is provided has high rigidity. Strength can also be secured. Moreover, here, stay 1g of frame 1
, The support strength is further improved.

Further, since the leg shield 7 is formed with a flat chamfered portion 7b at the portion where the unloading hook 35 is provided, the string of the luggage can be formed without protruding the unloading hook 35 backward so much. Can secure a space to catch

Further, in FIG.
A main switch 40 is attached to the head pipe 1f of the frame 1 via a bracket 1h on the right side of the frame 1. The upper end 40a of the main switch 40
Is exposed through an opening 7c formed in the leg shield 7, and a key is inserted into a key hole of the upper end portion 40a of the main switch so that the key can be locked / unlocked.

The periphery 7 d of the opening 7 a on the upper surface of the leg shield 7 is recessed downward so that water does not easily enter the main switch 40.

On the other hand, a notch 8a whose lower side is open is formed on both lower sides of the front surface of the front panel 8, and a front flasher lamp 42 is disposed in this notch 8a.

That is, the front flasher lamp 2
Numerals 4 are attached to the front panel 8 at three positions a, b and c in FIG. At the positions a, b, and c, as shown in FIG. 22 typified by the position a, the mounting boss 8b projects rearward at the periphery of the notch 8a. The lamp body 42a of the front flasher lamp 42 has a mounting piece 42b protruding therefrom. And these mounting pieces 42b are attached to the mounting boss 8
The front flasher lamp 42 is attached so as to fit into the notch 8a by being screwed to the screw 43.

In this way, since the front flasher lamp 42 is located at the lowermost end of the front surface of the front panel 8, a hand is inserted into the back of the front flasher lamp 42 as shown by an arrow in FIG. The workability of replacing the valve 42c is good.

The front flasher lamp 4
2 is attached to the notch 8a, so that the notch 8
Even if the lower side of the front flasher lamp 42 is open, the surface rigidity of the mounting portion of the front flasher lamp 42 can be secured.

Further, the lower side of the notch 8a is open, and by arranging the front flasher lamp 42 here, the irradiation range downward can be expanded.

As shown in FIGS. 5 and 6, the footrest board 6 has a tunnel portion 6e projecting upward at the center in the vehicle width direction, and footrest portions 6f on both sides of the tunnel portion 6e. Is formed.

As shown in FIG. 6, the foot rest 6f
The maintenance opening 6g is formed at the rear end, and a tandem foot step 12 is provided in the maintenance opening 6g. The tandem foot step 12 has a recess 12a formed in a part thereof, and is attached to the frame 1 at two places in FIG.

By removing the tandem foot step 12, maintenance (plug replacement, etc.) of the engine 2 can be performed through the maintenance opening 6g, and the tandem foot step 12 can be used also as a maintenance lid.

The tandem foot step 12
Is formed by forming the recess 12a.
If the heel of the foot of the tandem rider is positioned as indicated by the two-dot chain line in FIG. 6A, the foot can be placed in a comfortable state without having to forcibly extend the ankle.

Further, the side cover 11 on the upper side of the recess 12a is formed with a bulging portion 11a which swells to the side. The recess 12a is formed to lower the position of the bottom of the recess 12a. Accordingly, the footrest surface of the recess 12a can be positioned below the bulging portion 11a while avoiding the bulging portion 11a, so that a space for a tandem occupant to get on can be secured. it can.

Further, as shown in FIG. 23, a tail lamp 47 is disposed inside the rear surface 11b of the side cover 11, and a pair of upper and lower lamp openings 11c are disposed in the rear surface 11b of the side cover. Lamp opening 11c
The tail lamp 47 is facing. In the tail lamp 47, a bulb 47b is provided on the back side of a single lens 47a, and the single lens 47a is exposed to the outside across the two lamp openings 11c.

By providing a pair of upper and lower lamp openings 11c and exposing different portions of one tail lamp 47 from this, the two tail lamps 47 can be seen in appearance.
Appears to be provided, and the appearance quality is improved.

On the other hand, as shown in FIGS. 1 and 8 and the like, a suspension bracket 49 as a “suspension mechanism” is provided in the unit swing type engine 2 so as to extend forward from a lower portion of a front portion. The front end of the suspension bracket 49 is attached to the frame 1 by a pivot shaft 50 so as to be vertically movable. The unit swing type engine 2 is mounted below a seat 64 to be described later, and a radiator 56 to be described later is arranged on a vehicle body side in front of the unit swing type engine 2.

A lower end 51a of a rear cushion 51 is rotatably attached to the rear end of the engine 2, and an upper end 51b of the rear cushion 51 is turned around a bracket 54 fixed to the frame 1. It is movably supported.

In this unit swing type engine 2, as shown in FIGS. 1, 8 and 24, the cylinder shaft of the cylinder block 2a extends in the vehicle longitudinal direction and the piston 2b
Is disposed substantially horizontally so as to be located in front of the vehicle, and the piston 2b is connected to a crankshaft 2d via a connecting rod 2c. A camshaft 2p is connected to the crankshaft 2d via a chain 2e, and a rotary shaft 2q of a water pump 2f is connected to the camshaft 2p.
A V-belt transmission 2g is disposed at an end of the transmission.

The water pump 2f is connected to the suspension bracket 49 at the front of the unit swing type engine 1.
And the impeller 2h of the rotating shaft 2q is rotated via the transmission medium of the chain 2e, so that cooling from a radiator 56, which will be described in detail later, is performed. Water "water passage pipe"
The cooling water circulated in the engine 2 is returned to the radiator 56 via a return hose 57b.

The water pump 2f and the radiator 5
The supply hose 57a connecting the pivot 6 is routed through the vicinity of the pivot shaft 50.

As described above, since the water pump 2f is disposed near the pivot shaft 50 at the front of the unit swing type engine 2 and the supply hose 57a passes near the pivot shaft 50, the water pump 2f Hose 57
a can be shortened, and even when the unit swing type engine 2 swings, the movable space of the supply hose 57a can be narrowed.

Further, below the water pump 2f,
Since the suspension bracket 49 is provided, the suspension bracket 49 is protected by the bracket 49 and can be prevented from being damaged by a jumped stone or the like.

Further, the water pump 2f is disposed at the front of the unit swing type engine 2, and the supply hose 57a extends forward from this front.
Compared with a conventional cable that is routed along the engine, it is less susceptible to heat from the engine 2 and can improve durability and the like.

In the V-belt transmission 2g, a pulley 2i on the driving side is disposed on a crankshaft 2d, and a V-belt 2j is wound around a V-shaped groove of the pulley 2i. When the width of the groove changes, the position of the V-belt 2j changes. The V belt 2j is wound around a driven pulley (not shown) to transmit power to the rear wheel 4. The width of the groove of the driven pulley also changes.

An outside air introduction duct 52 for introducing outside air to cool the inside of the transmission chamber 2k in which the V-belt transmission 2g is disposed is connected via an element 2m.

The outside air introduction duct 52 extends forward from the unit swing type engine 2 and has a flexible portion 52a made of rubber and a rigid portion 52b made of synthetic resin. The flexible portion 52a has a bellows shape formed substantially on the front side and a rear end portion connected to the belt chamber (engine 2), while a rear end portion of the rigid portion 52b is connected to the front end portion. I have. The rigid portion 52b is fixed to the frame 1 in the vicinity of the rear end by a belt 53, extends upward at the front side from the fixed portion, and is inserted into the footrest board tunnel portion 6e at the upper end to form the tunnel portion. 6e, at a position facing the upper surface, the outside air introduction duct 5
The second intake port 52c is open and faces upward.

As described above, since the engine 2 is of a unit swing type and swings up and down with respect to the frame 1, the flexible portion 52a of the outside air introduction duct 52 allows the unit swing type engine 2 and the frame 1 to be connected to each other. To absorb the relative movement of

The outside air introduction duct 52 has an air inlet 5
2c is set at a high position in the tunnel 6e, and the intake port 52c of the outside air introduction duct 52 is open in the tunnel 6e. The hot air of No. 2 is not sucked through the intake port 52c, and clean and cold outside air can be supplied into the transmission chamber 2k, and cooling performance can be ensured.
In the transmission chamber 2k, the outside air is blown rearward by fins 2n formed on the pulley 2i.

By the way, there is also a case where the frame 1 is used as a duct. However, since the diameter is small, the inflow of outside air per unit time cannot be so large, and there is a possibility that the cooling performance cannot be ensured. Then, the weight of the vehicle body increases.

On the other hand, by providing the outside air introduction duct 52 separately from the frame 1, the diameter can be increased without significantly increasing the weight, and the cooling performance can be secured.

As shown in FIGS. 25, 26 and 27, both rear cushions 51 are provided with adjusting members 51c for performing initial adjustment.
An operating pipe 51d projecting obliquely downward is welded to the adjusting member 51c of one of the rear cushions 51 disposed between the muffler 55 and the rear wheel 4, and is projected obliquely downward. The initial adjustment can be performed by operating the 51d with an in-vehicle tool (not shown) and rotating the adjustment member 51c.

By welding the operation pipe 51d and projecting below the muffler 55 in this manner, even when the rear cushion 51 is disposed between the muffler 55 and the rear wheel 4, the muffler 55 does not interfere. , The initial adjustment can be easily performed.

In FIG. 28, reference numeral 56 denotes a radiator, which is connected to the horizontally arranged engine 2 via the supply hose 57a and the return hose 57b as described above.

The radiator 56 is a leg shield 7
And between the right and left pipes 1i extending obliquely downward from the head pipe 1f of the frame 1 (see FIG. 30 and the like).

The radiator 56 is provided with the tank 5 up and down.
6a, 56b are provided, and both tank portions 5
6a and 56b are connected by a fin portion 56c.
When the running wind passes between the fins 56c, the cooling water flowing in the fins 56c undergoes heat exchange and is cooled. And the lower tank part 56
a has a supply hose 57a on the right side of the vehicle body as viewed from the rear of the vehicle.
Is connected and extended to the engine 2 and the engine 2
Is connected to a return hose 57b, which is extended forward and connected to the right side of the vehicle body when viewed from the rear of the upper tank portion 56b. The return hose 57b is connected to the tunnel 7e,
6e.

As described above, the tank portions 56a, 56b
By arranging the radiator 56, the left and right widths of the radiator 56 can be reduced, so that the left and right vehicle body widths can be shortened while securing a foot mounting space.

The return hose 57b is connected to the tunnel 7
By arranging the return hoses 57e and 6e in the tunnel sections 7e and 6e,
e can protect the return hose 57b.

As shown in FIG. 31, the radiator 56 is disposed on a lower cover 58 that covers the lower part of the vehicle body in a slightly inclined state, and a radiator guard 59 is disposed behind the radiator 56. Have been.

The lower cover 58 has its front end raised upward to form a louver portion 58b on the front side of the radiator 56. The louver portion 58b guides the traveling wind to the radiator 56.

The lower cover 58 has a cooling air outlet 58a formed at a position rearward of the radiator 56. Further, a rear end 58c of the lower cover 58 has a rear end tandem as shown in FIG. It is extended to the vicinity of the foot step 12.

The lower cover 58 corresponds to a conventional inner panel and an under cover integrally formed.

Further, the radiator guard 59 has a U-shaped horizontal section, is located on the side of the radiator 56, and has a pair of side walls 59c extending in the longitudinal direction of the vehicle, and a rear wall 59d connecting the side walls 59c. And

The radiator guard 59 has a lower end 59
a is inserted into the cooling air outlet 58 a of the lower cover 58, while the upper end 59 b covers the upper side of the radiator 56.

Thus, the cooling air introduced from the louver portion 58b passes through the radiator 56 and undergoes heat exchange, and then this warm air is guided to the radiator guard 59, and
The cooling air is discharged downward from the cooling air outlet 58a of the lower cover 58.

Incidentally, a canister 60 is attached to the radiator guard 59 as shown in FIG.

On the other hand, reference numeral 64 in FIG. 9 denotes a two-seater seat.
However, a storage box 66 is provided behind the fuel tank 65.

A battery box 68 is provided between the fuel tank 65 and the storage box 65 as shown in FIGS. 5, 6, 32 and 33.
The battery box 68 is formed integrally with the side cover 11 as an “exterior cover”, in which a battery 69 can be stored, and can be opened and closed by a lid 70.

As described above, by integrally molding the battery box 68 with the side cover 11, the number of components can be reduced and the space can be effectively used.

In particular, when the size of the battery box 68 becomes large, it is difficult to arrange the space below the footrest board 6 in terms of space. When the battery box 68 is arranged on the front side of the vehicle, a long harness up to the engine 2 is arranged. I have to search.

As a result, the space between the fuel tank 65 and the storage box 66 is optimal as a place close to the engine 2 and capable of securing a space.

On the other hand, the fuel tank 65 is shown in FIGS.
As shown in FIG. 5, an oil supply port 65a is provided at the front end of the upper part, supported by the frame 1. A fuel pump 72 is attached to a side surface of the fuel tank 65 so as to supply the fuel in the fuel tank 65 to the carburetor 73.

More specifically, the bottom portion 6 of the fuel tank 65
The hose 75 extended from the strainer 74 is connected to the hose 5c.
5 is connected to the fuel pump 72. The fuel pump 72 is connected to the carburetor 73 via a hose 76, and is connected to an intake manifold 78 via a negative pressure hose 77.

According to this, the negative pressure from the intake manifold 78 is used to remove the strainer 74 from the fuel tank 65.
After the fuel is sucked into the fuel pump 72 through the fuel pump 72, the fuel is discharged from the pump 72 to supply the fuel to the carburetor 73 through the hose 76.

In such a case, the fuel tank 6
Since the height of the carburetor 73 and the carburetor 73 are set to be close to each other, it is difficult to supply the carburetor 73 from the fuel tank 65 satisfactorily using the height difference. The fuel inside is forcibly sent to the carburetor 73 side.

In the case of using the fuel pump 72 as in this embodiment, the height of the fuel pump 72 is made higher than the height of the carburetor 73 and the length of the negative pressure hose 77 is shortened. Can be stabilized.

Further, since the fuel pump 72 is mounted on the side surface 65b of the fuel tank 65,
When the fuel tank 65 is detached, it can be detached together with the fuel tank 65, and sub-assembly becomes possible.

The storage box 66 has a size enough to store a helmet or the like, is supported by the frame 1, and has an upper opening 66 a opened and closed by the seat 64.

As shown in FIGS. 1 and 9, a standing handle 81 is fixedly disposed on a side of the storage box 66 so as to protrude upward from a part of the frame 1. Storage box 66 in,
The cross-sectional structure of the seat 64 and the side cover 11 is shown in FIG.
It is shown as follows.

That is, the side wall 66b of the storage box 66
Has a sealing surface 66c formed at the upper end thereof, and a weir 66d inside the sealing surface 66c.
6c is formed to protrude above the general surface of 6c. Then, the seal member 82 attached to the sheet 64 side comes into contact with the seal surface portion 66c to be sealed.

Outside the sealing surface 66c of the storage box 66, the horizontal surface 66
e is formed, and an inclined piece 66f is formed in which the outer end of the horizontal surface portion 66e extends obliquely upward. A recess 66g is formed by the “wall portion” such as the horizontal surface portion 66e and the inclined piece 66f, and the side edge portion 64a of the sheet 64 is inserted into the recess 66g.

Further, an attachment piece 11i extended from the side cover 11 is screwed into a fixing portion 66h formed on the storage box side wall 66b, while a portion corresponding to the standing handle 81 is provided on the side cover 11. A cover 11d is formed to bulge upward to cover the handle 81, and an upper end 11e of the cover 11d is formed.
Is the upper end flange portion 6 of the storage box inclined piece 66f.
6i so as to overlap and be continuous.

The occupant can insert his / her hand through the opening 11f formed in the side cover 11 and hold the standing handle 81 to raise the vehicle. The side cover 11 is divided into two right and left parts with the center of the vehicle body as the center.

As described above, the sheet side edge 64a is
g, and the upper end 11e of the side cover 11
Is overlapped on the upper end flange 66i of the storage box inclined piece 66f, the continuity between the seat side edge 64a and the side cover 11 is obtained, and the appearance quality is secured.

By forming a dam portion 66d projecting upward inside the sealing surface portion 66c, the storage box 66 is compared with a structure in which the sealing member 82 is simply brought into contact with the flat sealing surface portion 66c to perform sealing. It is possible to more reliably prevent water from entering the inside.

Further, the water that has flowed down from the seat 64 or the like into the recess 66g flows forward toward the vehicle and is drained because the recess 66g is lowered forward, so that water enters the storage box 66. Can be prevented.

Further, as shown in FIGS. 2, 50, 51, etc., the side wall 66b of the storage box 66 has
While the air intake system cleaner 87 (hereinafter referred to as “AIS cleaner 87”) is attached,
An AIS control valve 88 to which the S cleaner 87 is connected is attached to a rear arm 90 that suspends the rear wheel 4. As shown in FIG. 50, the rear arm 90
The rear wheel 4 is fixed to the unit swing type engine 2 by b, and is supported between a transmission case 2s extended rearward of the unit swing type engine 2 and its rear arm 90.

The AIS control valve 88 introduces a predetermined amount of outside air into the exhaust passage and burns unburned gas. The AIS cleaner 87 is provided in the middle of the intake of the outside air, and is provided with dust, water and the like. Is prevented from being inhaled.

More specifically, the AIS cleaner 87
Has one end attached to a bracket 91 fixed to the frame 1, and the other end attached to a side surface of the storage box 66.

A rubber hose 86a is connected to the AIS cleaner 87, and the tip of the rubber hose 86a is inserted into the frame 1. After the air sucked from the hose is cleaned by the AIS cleaner 87, the molded rubber hose 86b Through the AIS control valve 88, and when the AIS control valve 88 is open, the AIS control valve 88
From outside through the metal pipe 86c to the exhaust passage. As shown in FIG. 54, the metal pipe 86c is connected to the cylinder head 2t and communicates with the exhaust passage.

As shown in FIGS. 50 and 51, the AIS control valve 88 has a bolt 88 on the rear arm 90 between the unit swing type engine 2 and the muffler 55.
h. The muffler 55 is shown in FIG.
As shown in the figure, the boss 90a is supported by a plurality of bosses 90a projecting from the rear arm 90.

The structure of the AIS control valve 88 is, as shown in FIG. 53, provided with an opening / closing valve 88a for opening / closing an external air passage from the AIS cleaner 87 to the exhaust manifold 89 side.
Is attached to the diaphragm 88c.
The upper negative pressure chamber 88d partitioned by the diaphragm 88c is connected to the intake manifold 78 by a pipe 86d (see FIG. 4).

As a result, when the negative pressure in the intake manifold 78 increases, the negative pressure in the negative pressure chamber 88d through the pipe 86d.
The negative pressure in the inside becomes large, the diaphragm 88c is displaced upward against the urging force of the spring 88e, and the open / close valve 8 is opened.
8a rises from the state shown in FIG. 53, and at the highest position, the outside air introduction passage is closed. The backflow of the exhaust gas from the exhaust passage is prevented by a check valve 88f (reed valve). Reference numeral 88g denotes a check valve 88.
f is a stopper that stops when it is opened to a predetermined position.

The wiring of the pipe 86d is shown in FIG.
As shown in FIG. 28, the intake manifold 7 extends from the AIS control valve 88 disposed on the right side of the vehicle body to the left side of the vehicle body.
8 from the left side of the vehicle body.

Since the AIS control valve 88 is attached to only the rear arm 90 as described above, since the AIS control valve 88 is not disposed over two members having different natural frequencies as in the conventional case,
Damage to the mounting portion of the IS control valve 88 can be prevented. Also,
Since it is not attached to the muffler 55, there is no need to take heavy heat measures, and the rear arm 90 is firmly attached to the unit swing type engine 2 and is unlikely to wobble like the muffler 55. Therefore, the adverse effect of the vibration on the AIS control valve 88 can be prevented.

Further, the AIS control valve 88 is disposed on the right side of the vehicle body, and the return hose 57b of the engine cooling water is routed at substantially the same height on the right side of the vehicle body. Since the return hose 57b has a high temperature, it is difficult to connect the pipe 86d to the intake manifold 78 on the right side of the vehicle body because the return hose 57b is in the way. Therefore, since the pipe 86d is extended to the left side of the vehicle body and connected to the intake manifold 78 on the left side, the connection workability is improved. The connection position of the pipe 86d is determined by the elbow portion 7
8a, which is connected to the outer surface having a large radius of curvature,
In this part, since the change in the flow velocity of the intake air is large, the change in the negative pressure is also large, and the accuracy of detecting the negative pressure is improved.

In addition, below the AIS control valve 88,
As shown in FIGS. 50, 51, 55, and 56, the exhaust manifold 89 and the muffler 55 as the "exhaust device"
A protector 92 is provided to cover the
A space K is formed between the valve and the AIS control valve 88.

The protector 92 has a substantially triangular shape when viewed from the side as shown in FIG. 50, and has a cross section formed in an arc shape as shown in FIGS. 55 and 56, and is fixed to the exhaust manifold 89 and the muffler 55. It is attached to the support bracket 92a with a bolt 92b. The protector 92 covers the outer side surface and the upper surface of the exhaust manifold 89 and the muffler 55.

By covering the muffler 55 and the like with the protector 92 in this way, the muffler 55 and the like, which are provided with a catalyst and become particularly hot, are not exposed to the outside.

Further, by shielding the heat from the muffler 55 and the like by the protector 92, the adverse effect of the heat on the AIS control valve 88 is suppressed. Moreover, since the space K is provided between the protector 55 and the AIS control valve 88, the influence of heat from the muffler 55 side can be further suppressed.

Further, as shown in FIG. 9, a sheet metal 84 is disposed on the side wall 66b of the storage box.
4, a rear end portion 85a of the seat damper 85 is attached with bolts and nuts, and a front end portion 85b of the seat damper 85 is attached to the seat 64. The seat damper 85 is routed through the side of the battery box 68, and as shown in FIG.
h is formed, and when the seat 64 is opened, the opening 11h serves as a relief, and the seat damper 85 rotates upward.

When the seat 64 is opened, the pilot screw 73a of the carburetor 73 is exposed through the damper opening 11h as shown in FIG. 32 and the like, so that the pilot screw 73a can be easily adjusted. be able to.

As shown in FIG. 9, the seat 64 is formed by laminating a sheet core material 64b, a cushion material 64c, and a skin 64d, and a front end 64e is rotatable toward the frame 1 via a hinge 93. Installed.

The seat core member 64b is provided with a seat-side load receiving portion 64f having an H-shaped horizontal cross section projecting downward from a substantially central portion in the vehicle front-rear direction, while being provided in the middle of the standing handle 81. The support seat 94 is fixed inward. The bottom surface 11g of the concave portion of the side cover 11 is screwed to the support seat 94 with a screw 95, and the seat-side load receiving portion 64 is placed on the bottom surface 11g.
f is in contact.

As shown in FIG. 2 and FIG. 9, the frame 1 at a position corresponding to the rear end of the sheet 64 is
Seat lock device 97 for locking the rear end of seat 64
The seat lock device 97 is connected to the main switch 40 via a seat lock wire 98.

When the main switch 40 is operated by key operation to the unlock position, the seat lock wire 97 is pulled and remotely operated, whereby the seat lock device 97 is unlocked. .

This seat lock wire 98 is connected to the front end 9
After being inserted rearward from tunnel 8a into tunnel portions 6e and 7e, it is inserted into protector 99 having a U-shaped cross section.
The frame 1 is pulled out from the rear end of the frame 1 and connected to the seat lock device 97.

As described above, the seat lock wire 98 is provided in the protector 99 having the U-shaped cross section and the pipe-shaped frame 1.
Is inserted and protected, the sheet lock wire 98 can be prevented from being pulled by an unauthorized unlocking input from the outside, and theft prevention can be ensured.

Further, a tandem handle 101 is disposed behind the seat 64 as shown in FIGS. 9, 37, 38 and the like. A carrier 102 and a backrest 103 are attached to the tandem handle 101 and the like. Have been.

As shown in FIG. 37, the tandem handle 101 has a front leg portion 101a fixed to the frame 1 by bolts 101b, and a rear mounting portion 101c mounted to the frame 1 by bolts 101d.

On the other hand, as shown in FIG. 38, the carrier 102 has
02c, the bolt 10
2c is a rear mounting portion 10 of the tandem handle 101.
1c. Also, this carrier 102
As shown in FIG. 9, the handle mounting portion 102b at the upper end is mounted on the tandem handle 101 with bolts 102d.

[0130] Further, the backrest 103 is provided as shown in FIG.
As shown in the figure, the tandem handle 101 is fixed on the rear portion by a bolt 103a.

Further, as shown in FIGS. 39 and 40, a helmet hanger 105 for suspending a helmet is provided on the back surface of the seat 64 at the front end side.

The helmet hanger 105 is of a wire type. One end portion 105a is attached to the back surface of the seat 64, the other end portion is provided with a ring portion 105b, and the ring portion 105b is provided on the back surface of the seat 64.
6 is disengaged. A folding member 109 is disposed on the back surface of the sheet 64, and the folding member 109 is folded with the middle of the helmet hanger 105 hung.

On the other hand, a protrusion 107 is provided on the fuel tank 65 side at a position corresponding to the hook bar 106 so as to protrude upward.

The method of using the helmet hanger 105 is as follows.
08, the hanger 105 is inserted, and the ring portion 105 b of the hanger 105 is hooked on the hook bar 106 on the back surface of the sheet 64. When the seat 64 is closed, the hook rod 106 is inserted into the projection 107 on the fuel tank 65 side, and the ring portion 10 is closed.
5b is prevented from being detached from the hook bar 106.

As shown in FIG. 20, the front fender 110 which covers the upper side of the front wheel 3 has a front portion 110a located forward of the under bracket 111 and projects upward. 110b is formed one step lower.

Thus, even if the front fender 110 moves up and down integrally with the front wheel 3, a gap H is secured between the rear portion 110b of the front fender 110 and the under bracket 111. Since the front fender 110 and the under bracket 111 do not interfere with each other and the gap between the front bracket 110 and the under bracket 111 is not visible from the front at the raised front fender front portion 110a, the appearance quality is improved. Can be secured.

On the other hand, as shown in FIGS. 1 to 3 and FIGS. 41 to 44, a rear fender 113 provided on the rear wheel 4 side is provided.
Is a rear fender body 113a that covers the upper side of the rear wheel 4.
And a cover portion 113b extending from the right corner of the front end of the rear fender body portion 113a.
The AIS control valve 88 is covered by the cover 113b.

At the boundary between the cover 113b and the rear fender body 113a, as shown in FIG.
A total of two drain holes 113c are formed.

By forming the drain hole 113c in this way, the rear fender 11 is formed through the drain hole 113c.
3 can be drained, and waterproofing of the air cleaner 115 is performed.

That is, the water on the rear fender body 113a due to the water or the like wound by the rear wheel 4 is blocked by the air cleaner 115 itself on the left side of the vehicle body center line, and is disposed on the front side of the air cleaner 115. The air does not enter through the intake port 115a. In addition, the water or the like wound by the rear wheel 4 causes the rear fender main body 113a
The water above the drain hole 11 on the right side of the vehicle center line
By being drained from 3c, it does not flow to the front side from here, and the intrusion of water from the air inlet 115a arranged on the front side of the air cleaner 115 is prevented.

As shown in FIG. 8 and FIG. 45, the air inlet 115a of the air cleaner 115 faces obliquely outward, and the box 1 surrounds the air inlet 115a.
16 are arranged, and an opening 116a of the box portion 116 is provided.
Are directed sideways, and a flange portion 116b is formed at the periphery of the opening 116a to prevent water from entering the opening 116a outward. This flange 1
A cutout 116c is formed on the upper side of 16b, in which a sponge 119 is provided.

Further, a first waterproof flap 117 extending in the vehicle front-rear direction is provided above the intake port 115a with a belt 117.
a, a second waterproof flap 118 extending in the vehicle width direction is inserted through a hole 118a at a front side of the intake port 115a.
It is attached and arranged. The waterproof flaps 117 and 118 are made of rubber and are integrally formed.

The first waterproof flap 117 prevents water from above from entering the intake port 115a, and the second waterproof flap 118 prevents water from the front of the vehicle from entering the intake port 115a. .

Further, the water flowing on the box portion 116 is absorbed by the sponge 119 so that the opening 11
6a can be prevented from entering the air inlet 115a of the air cleaner 115. If the sponge 119 is provided in this manner, even if water collides with the sponge 119, it can be prevented from jumping up. Therefore, it is possible to effectively prevent water from entering as compared with the case where the flange 116b is simply formed. Further, since the side molding 13 has the rib 13g formed near the back surface of the second waterproof flap 118, it is possible to prevent water from flowing from the front side to the rear side of the second waterproof flap 118.

On the other hand, reference numeral 120 in FIG. 46 denotes a recovery tank, which is disposed below the footrest board 6. More specifically, the recovery tank 120 has a tank body 120a provided to be freely opened and closed by a cap 120b, and the cap 120b faces upward from a gourd-shaped tank opening 6h formed in the footrest board 6. The tank opening 6h is opened and closed by a cover 121.

This cover 121 has a pair of hook pieces 1
On the side opposite to the hook pieces 121a, elastically deformable locking pieces 121b are formed. The pair of hook pieces 121a are locked on the back side of the peripheral portion of the tank opening 6h, and the locking pieces 121b are engaged with and disengaged from the peripheral portion.

The tongue piece 12 is attached to the cap 120b.
0c is formed, and the cap 1 is held by holding the tongue piece 120c.
Water can be absorbed by removing 20b.

When absorbing the cooling water into the recovery tank 120, the mat 123 is removed and the cover 12 is removed.
The first locking piece 121b is operated to release the locking state and is removed, and the cap 120b is removed with the tongue piece 120c. When the cap 120b is removed in this way, the tongue piece 120c can be pinched by inserting a finger into the gourd-shaped head of the tank opening 6h, and the head can be used as a finger insertion space.

The joining portion between the side molding 13 and the footrest board 6 is shown in FIGS. 5, 47, 48 and 49.
It is shown as follows. That is, the side molding 13
A mounting piece 13a extending substantially horizontally is formed on the upper part of
A bolt hole 13b is formed in the mounting piece 13a, and a projecting piece 13c is formed at a further end of the mounting piece 13a. A fixing portion 6i having a U-shaped cross section of the footrest board 6 is fixed to the mounting piece 13a with a screw 13d.

At the upper end of the side molding 13, a mounting piece 13e on which the edge of the mat 123 is mounted is formed, and the mounting piece 13e has a step 13f.
Is formed, and the edge of the mat 123 is fitted into the step portion 13f. Thereby, mat 1
The positioning of the mat 23 can be performed, and the edge of the mat 123 can be prevented from floating.

Furthermore, the mounting piece 1 of the side molding 13
3a is formed with a protruding piece 13c extending further forward, so when the side molding 13 is temporarily fixed, the mounting piece 13a is inserted into the inside of the fixing portion 6i of the footrest board 6 having a U-shaped cross section. In the state, the side mall 1
If the third member 3 is to fall outward, the projection 13c abuts on the back surface of the footrest board 6, so that the falling can be prevented.

[0152]

As described above, according to the first aspect of the present invention, the AIS control valve is located between the unit swing type engine and the muffler, and is arranged on the rear arm supporting the rear wheels. Since it is not disposed over two members having different natural frequencies as in the related art,
It can prevent damage to the mounting part of the AIS control valve,
Since it is not attached to the muffler, heat measures for heavy equipment are not required, and adverse effects due to vibration can be prevented.

According to the second aspect of the present invention, in addition to the above effects, a protector for covering the exhaust device is provided below the AIS control valve, and a protector is provided between the protector and the AIS control valve. Since the space is formed, heat from the muffler and the like can be shielded by the protector, and
An adverse effect of heat on the S control valve can be suppressed. Moreover, since a space is provided between the protector and the AIS control valve, a practically useful effect that the influence of heat from the muffler side can be further suppressed is exhibited.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall outline of a scooter type vehicle according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the entire scooter type vehicle according to the embodiment.

FIG. 3 is a plan view showing an overall outline of the scooter type vehicle according to the embodiment.

FIG. 4 is a plan view showing an overall outline of the scooter type vehicle according to the embodiment.

FIG. 5 is a plan view of the scooter type vehicle according to the embodiment with a seat removed.

FIG. 6 is a side view of a state where the covers according to the embodiment are combined.

FIG. 7 is a front view of a state where the covers according to the embodiment are combined.

FIG. 8 is a side view of the same embodiment with covers removed.

FIG. 9 is a partially cutaway side view showing a seat and the like according to the embodiment.

FIG. 10 is a plan view showing a frame according to the embodiment.

FIG. 11 is a side view showing the frame according to the embodiment.

FIG. 12 is a plan view showing a part of the footrest board according to the embodiment.

FIG. 13 is an exploded perspective view of a front portion of the vehicle according to the embodiment.

FIG. 14 is a front view of the inside of the handle cover according to the embodiment.

FIG. 15 is a view of the instruments according to the embodiment as viewed from a driver.

FIG. 16 is a side view of the screen, the meter visor, and the like according to the embodiment.

FIG. 17 is an exploded perspective view showing first and second meter visors according to the embodiment.

FIG. 18 is a diagram showing a front trunk, a unloading hook, and the like according to the embodiment.

FIG. 19 is a view in which a part of the opening / closing lid of the front trunk according to the embodiment is cut away.

FIG. 20 is a side view showing a front fender and the like according to the embodiment.

FIG. 21 is a sectional view taken along the line AA of FIG. 7 according to the same embodiment.

FIG. 22 is a sectional view taken along the line BB of FIG. 6 according to the embodiment.

FIG. 23 is a view of the scooter type vehicle according to the embodiment as viewed from the rear.

FIG. 24 is a plan view showing a part of the engine according to the embodiment.

FIG. 25 is a side view showing the rear cushion and the muffler according to the embodiment.

FIG. 26 is a plan view showing a rear cushion and a muffler according to the embodiment.

FIG. 27 is a half sectional view of the rear cushion according to the embodiment.

FIG. 28 is a side view showing a wiring state of the radiator and the like according to the embodiment.

FIG. 29 is a plan view showing a wiring state of the radiator and the like according to the embodiment.

FIG. 30 is a front view of FIG. 28 according to the same embodiment, viewed from the direction of arrow C.

FIG. 31 is a side view of the front part of the scooter type vehicle according to the embodiment.

FIG. 32 is a plan view of a battery box portion according to the embodiment.

FIG. 33 is a sectional view taken along line DD of FIG. 32 according to the same embodiment.

FIG. 34 is a plan view around the fuel tank disposition portion according to the embodiment.

FIG. 35 is a side view around the fuel tank disposition portion according to the embodiment.

FIG. 36 is a sectional view taken along the line EE in FIG. 9 according to the embodiment.

FIG. 37 is a sectional view taken along the line FF of FIG. 9 according to the embodiment;

FIG. 38 is a sectional view taken along the line GG of FIG. 9 according to the embodiment;

FIG. 39 is a side view schematically showing the helmet hanger according to the embodiment.

FIG. 40 is a plan view schematically showing the helmet hanger according to the embodiment.

FIG. 41 is a side view of the rear fender according to the embodiment.

FIG. 42 is a plan view of the rear fender according to the embodiment.

FIG. 43 is a sectional view taken along the line HH of FIG. 42 according to the embodiment;

FIG. 44 is a view of FIG. 42 according to the embodiment when viewed from the direction of arrow I.

FIG. 45 is a front view of a second waterproof flap and the like according to the embodiment.

FIG. 46 is a sectional view taken along the line JJ of FIG. 4 according to the embodiment.

FIG. 47 is a sectional view taken along the line KK of FIG. 5 according to the embodiment.

FIG. 48 is a plan view of the side molding according to the embodiment.

FIG. 49 is a sectional view taken along the line LL of FIG. 48 according to the embodiment.

FIG. 50 is a right side view of the vehicle body rear side according to the embodiment.

FIG. 51 is a plan view showing an arrangement of a muffler, an AIS control valve, and the like according to the embodiment.

FIG. 52 is a view of the engine and the muffler according to the embodiment as viewed from the front of the vehicle.

FIG. 53 is a cross-sectional view of the AIS control valve according to the embodiment.

FIG. 54 is a cross-sectional view of the same embodiment along the line MM in FIG. 50;

FIG. 55 is a sectional view taken along the line NN of FIG. 50 according to the embodiment.

FIG. 56 is a sectional view taken along the line PP of FIG. 50 according to the embodiment.

[Explanation of symbols]

 2 Unit swing type engine 4 Rear wheel 55 Muffler (exhaust device) 78 Intake manifold 87 AIS cleaner 88 AIS control valve 89 Exhaust manifold (exhaust device) 90 Rear arm 92 Protector K Space

Claims (2)

[Claims] 1. A transmission case in which a unit swing type engine is disposed so as to be vertically swingable about a pivot shaft provided at a front part thereof with respect to a vehicle body, and is extended rearward of the unit swing type engine. An air intake system control valve for a motorcycle provided with an air intake system control valve for introducing a predetermined amount of outside air into an exhaust passage and burning unburned gas while a rear wheel is supported between the rear wheel and the rear wheel In the above structure, the air intake system control valve is fixed to the rear arm. 2. A protector for covering an exhaust device is provided below the air intake system control valve, and a space is formed between the protector and the air intake system control valve. The motorcycle air intake system control valve arrangement structure according to claim 1.