CN1205080C - Liquified gas fuel tank structure for motorcycle - Google Patents

Abstract

The invention provides a liquefied gas fuel tank disposition structure of a motorcycle efficiently storing a fuel tank in a limited space, providing a compact car body structure, and contributing to the air pollution prevention. This liquefied gas fuel tank disposition structure of the motorcycle is provided with a opening/closing seat 12 rotating about a hinge 33 in the front end part, a front/rear-directionally long article storage space (storage box 29) in the lower side of the seat 12, and a fuel tank 80 provided with a fitting port 35 and having a cylindrical shape with a longitudinal direction. The fuel tank 30 is disposed in the article storage space 29 with the longitudinal direction of the fuel tank 30 set to the front/rear direction and the filling port 35 is provided in the front side, the rear side, or the upper side of the fuel tank 30.

Description

The liquified gas fuel tank structure of motor bike

Technical field

The present invention relates to the liquified gas fuel tank structure of motor bike.

Background technology

Gaseous fuels such as LPG (autogas) and natural fuels because objectionable constituent are few in its emission gases, as the measure that reduces atmospheric contamination be useful and its price more cheap than gasoline, so, be widely adopted as the fuel of Business Vehicle and motor bike etc.Because this fuel under high pressure liquefies, so be filled in the Fuel Tank that is loaded on the vehicle under liquid state.By the pressure that this liquefied fuel gas is reduced pressure about barometric pressure, make it gasification, utilize the negative pressure of the trunnion that is arranged on the mixer on the driving engine air suction way that it is attracted, mix with the driving engine suction air and burn.

As the motor bike fuel that comprises scooter and other motor scooters, when using liquefied fuel gas, the configuration efficiently of arranging spatially with Fuel Tank and pipe arrangement, when constituting vehicle compactly, in order to be easy to inflation and maintenance, must be arranged on Fuel Tank in the limited vehicle body space.

Summary of the invention

The present invention considers the problems referred to above, and its purpose is to provide a kind of liquefied fuel gas case configuration structure of motor bike, Fuel Tank more effectively is contained in the limited space, and when obtaining compact body structure, can also air conservation.

For achieving the above object, the invention provides a kind of liquefied fuel gas case configuration structure of motor bike,

The hinge that has with leading section is that the center rotates the vehicle seat that carries out on-off action, has the long article container space of fore-and-aft direction at the downside of this vehicle seat,

Also have the Fuel Tank with filling mouth, this Fuel Tank is the tubular with length direction,

It is characterized by, always this Fuel Tank is configured in the items spatial accommodation, fills front side or a rear side or the upside that mouth is arranged on Fuel Tank as front and back aforementioned with the length direction of aforementioned Fuel Tank.

Adopt this structure, by barrel-contoured Fuel Tank is installed to as fore-and-aft direction in the long article container space of fore-and-aft direction under the vehicle seat that is formed on scooter etc. with its length direction, needn't widen the Width of car, can dispose Fuel Tank more efficiently, when obtaining compact body structure, can fully guarantee propellant capacity.Because the filling mouth of this Fuel Tank is arranged on front side or rear side or upside except that the left and right side, so the Width that can widen car disposes Fuel Tank, and, owing to make full use of the spatial allocation Fuel Tank of the Width of limited car, so can strengthen the capacity of case.In addition, but vehicle seat is the axle hinge type with the leading section to open and close, under the vehicle seat rearward end is upspring the state of raising, can carry out from the front and back of the Fuel Tank that is installed on its downside at an easy rate or the filling mouth of upside carries out the filling operation of fuel, also keep in repair easily simultaneously.

In the preferred structure example, it is characterized by, aforementioned filling mouth is without cartridge, and direct mount is to Fuel Tank.

Adopt this structure,, fill the pipe direct mount to Fuel Tank owing between Fuel Tank and filling mouth, cartridge not being set, so, the number of minimizing parts, the simplification of pipe arrangement arrangement, and carry out assembling operation easily.In addition, can obtain to reduce the high fuel supply structure of danger, reliability of fuel leak.

As described above, in the present invention, by being the tubular Fuel Tank that fore-and-aft direction is installed in the long article container space of the fore-and-aft direction of vehicle seats such as being formed at scooter below with its length direction, the Width that can widen car disposes Fuel Tank effectively, when obtaining compact body construction, can fully guarantee propellant capacity.Because the filling mouth of this Fuel Tank is arranged on front side or rear side or upside except that the left and right side, thereby the Width configuration Fuel Tank that can add cart, and, owing to can make full use of the spatial allocation Fuel Tank of the Width of limited car, thus the capacity of case can be strengthened.In addition, vehicle seat is to be that the pivot hinge formula is to be opened/closed with the leading section, under the state of opening that vehicle seat rearward end bullet is got on, can be at an easy rate from the front and back of the Fuel Tank that is installed in its downside or the filling mouth of upside carry out the filling operation of fuel, also be easy to keep in repair simultaneously.Whereby, realize using liquefied gas as fuel, but the motor bike of the compactness of air conservation.

Description of drawings

Fig. 1 is the lateral plan according to the scooter of form of implementation of the present invention.

Fig. 2 is the planar view of scooter shown in Figure 1.

Fig. 3 is the planar view of the body tail under the state that the vehicle seat of scooter shown in Figure 1 is opened.

Fig. 4 is the section-drawing of the rear cross tube part of scooter shown in Figure 1.

Fig. 5 is the section-drawing of the front cross tube part of scooter shown in Figure 1.

Fig. 6 is the transparent view of installation bracket.

Fig. 7 is that Fuel Tank is installed the transparent view with the restraint zone end.

Fig. 8 is the planar view and the lateral plan of other form of implementation of the present invention.

Concrete form of implementation

With reference to the accompanying drawings form of implementation of the present invention is described.

Fig. 1 and Fig. 2 are respectively according to the lateral plan of the scooter of form of implementation of the present invention and planar view.

Vehicle body 1 has the not shown steering shaft that connects handle 2 and front-wheel 3, the head pipe that its vehicle body frame is supported by it and pipe (not shown) and left and right sides main car frame 4 (figure from its in the middle of begin expression) down, and be attached to formations such as subframe 5 on the main car frame 4 respectively.Described these vehicle body frames reach the rear portion vehicle body cover 8 that is connected on this vehicle body cover 6 via stretcher 7 by foreside bodywork cover 6 and cover.

Main car frame 4 is connected to each other about the rearward end place that body tail extends obliquely upward.Carriage 9 is attached to respectively on the rear portion of left and right sides main car frame 4.Rear cross tube 10 is attached between these left and right sides carriages 9, is erected between the left and right sides main car frame 4.In addition, front cross tube 11 is set, connects left and right sides subframe 5.Described rear cross tube 10 and front cross tube 11 are positioned at the downside of the vehicle seat (being the double tandem seat of taking in this example) 12 of the substantial middle of vehicle body.

Analog bracket 13 is attached on the left and right sides main car frame 4 of vehicle body central portion, and the centre is fixed with rocking bracket 15 pivotly via pivot 14 on this analog bracket 13.On the rear portion of this rocking bracket 15, the middle crankcase (not shown) that driving engine 17 is installed via two bolts 16.Driving engine 17 is four stroke liquefied gas as fuel driving engines that cylinder leans forward, and upside is connected to air inlet pipe 18, and downside is connected with freeing pipe 19.Air inlet pipe 18 be provided with mixer 20 midway, have air purifier 21 at its upstream.This driving engine 17 constitutes with transmission gearbox 22 integrally as oscillating engine unit 23, middle install swingably with respect to vehicle body frame via pivot 14, for example have V-shape belt formula stepless speed changer (not shown) in transmission gearbox 22 inboards, be connected on the axletree (not shown) of trailing wheel 25 via the speed reduction gearing (not shown) in the middle of its drive pulley 24.

The bottom of bumper 26 is pivotally mounted on the rearward end of engine unit 23.The upper end of bumper 26 is pivotally mounted on the rear cross tube 10.

Front and back handlebar stem 27 and the shelf 28 used of rider abreast on the rearward end that is fixed on main car frame 4 are equipped with at the rear of vehicle seat 12.Have the vehicle seat lock (not shown) that vehicle seat is locked onto closed condition at the rear portion of vehicle seat 12 downside.

The long storage case 29 of fore-and-aft direction is embedded in the vehicle body of downside of vehicle seat 12.This storage case 29 passes these transverse tubes 10,11 at the part opening of aforementioned rear cross tube 10 and front cross tube 11.Described cross section, back is installed in this storage case 29 is the oval Fuel Tank 30 cylindraceous that is roughly.Fuel Tank 30 middle is supported on described two transverse tubes 10,11 in back through carriage 42 as hereinafter described, is fixed with stainless steel band 31.

This storage case 29 is used to prevent the lower face side of the vehicle seats of making dirty such as mud that come up from body bottom section side bullet.It is not limited to the shape of casing, also can be simple tabular body.

On the leading section of storage case 29, be integrally formed hinge member 33 with axle 32.Be installed on this hinge member 33 the front end rotor of vehicle seat 12.Fuel Tank 30 is fixed in the storage case 29 with the state configuration that turns forward slightly.Whereby, the vehicle seat bottom 34 of the front part at the seat 12 that chaufeur takes is usually reduced, thickening vehicle seat material can improve cushion characteristic.

Front side at Fuel Tank 30 need not directly dispose filling mouth 35 via cartridge.Have safety valve 36 and handle 37 in the front side of filling mouth 35.Utilize metal fuel pipe 38 to be connected on the electromagnetic valve 39 via safety valve 36 in the middle of filling mouth 35.Electromagnetic valve 39 further is connected on the regulating control 41 by metal fuel pipe 40.Regulating control 41 is connected on the mixer 20 via the fuel hose 43 of softness.

Fig. 3 is the diagram of observing from top under vehicle seat 12 (Fig. 1) open mode that body tail sees.As shown in the figure, Fuel Tank 30, is contained in the storage case 29 as fore-and-aft direction compactly with length direction.Mouth 35 and handle 37 are filled in configuration expeditiously in the space of the front side of Fuel Tank 30 sky, can carry out the operation of filling operation and handle smoothly.In addition, the small space that fully effectively utilizes Fuel Tank 30 sides together at the electromagnetic valve 39 that needn't often operate at ordinary times and regulating control 41 and cartridge 38,40 is configured.Simultaneously, be hidden in the vehicle body cover, covered from top, so when vehicle seat 12 is locked, in fact also pin filling mouth 35 with vehicle seat 12 owing to fill mouth 35.Thereby the vehicle seat lock while is double as filling mouthful lock also, simplifies the structure of filling notch portion.

Fig. 4 and Fig. 5 are respectively the sectional structure charts of rear cross tube 10 and front cross tube 11 parts.

As shown in Figure 4, join on the left and right sides main car frame 4 via carriage 9 in the middle of the rear cross tube 10.On this transverse tube 10, it is two case bracket for mounting 42 of コ font that joint has cross section as shown in Figure 6.The installation edge 31a of mounting restraint zone 31 shown in Figure 7 on the upper surface of this carriage 42, last by mounting hole 31b, middle via rubber absorbers 45 fastening fixed fuel tanks 30 screw (perhaps knurled nut) 42a that bolt 44 is screwed to bracket for mounting 42.

As shown in the figure, the cross sectional shape of Fuel Tank 30 is oval.This is the cause of forcing down its height and can fully guaranteeing its capacity when effectively utilizing the space of left and right directions as far as possible.

Each inboard inclined-plane 42b (Fig. 6) of formation of the left and right sides carriage 42 of usefulness is installed, being bearing on this inclined-plane 42b through rubber absorbers 45 in the middle of the left and right sides of Fuel Tank 30 downsides at Fuel Tank.Be bearing on rear cross tube 10 (Fig. 4) and the front end transverse tube 11 (Fig. 5) via rubber absorbers 45 in the middle of the lower surface central authorities of Fuel Tank 30.

As shown in Figure 5, front cross tube 11 intermediate portions slightly form with being bent downwardly.As previously described, this is in order to make Fuel Tank 30 lean forward, reduce the seat bottom of vehicle seat 12, to increase the cause of the thickness of energy disperser.

Fig. 8 (A), (B) are planar view and the lateral plans of representing other form of implementation of the present invention respectively.

This form of implementation is arranged on filling mouth 35 top of Fuel Tank 30.The fore-and-aft direction of Fuel Tank 30 further can be extended whereby, increase the capacity of case.Other structure is the same with the form of implementation of effect and the effect that is produced and prior figures 1～Fig. 7.

As another form of implementation, also filling mouth 35 can be located at the rear (omitting among the figure) of Fuel Tank 30.Like this, can obtain effect and the effect identical with the form of implementation of earlier figures 1～Fig. 7.

Claims (2)

1. the liquefied fuel gas case configuration structure of a motor bike,

The hinge that has with leading section is that the center rotates the vehicle seat that carries out on-off action, has the long article container space of fore-and-aft direction at the downside of this vehicle seat,

Also have the Fuel Tank with filling mouth, this Fuel Tank is the tubular with length direction,

It is characterized by, always this Fuel Tank is configured in the items spatial accommodation, fills front side or a rear side or the upside that mouth is arranged on Fuel Tank as front and back aforementioned with the length direction of aforementioned Fuel Tank.

2. the liquefied fuel gas case configuration structure of motor bike as claimed in claim 1 is characterized by, and aforementioned filling mouth is without cartridge, and direct mount is to Fuel Tank.

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