CN106274450A - The sealing structure of fuel tank - Google Patents

Abstract

The present invention provides the sealing structure of a kind of fuel tank.In the inner side of the first fuel tank is provided with the fuel supply system of the second fuel tank, it is ensured that the first fuel tank and the sealing property of the second fuel tank.Fuel supply system (1) possess have the first opening (5) the first fuel tank (2), have the second opening (45) and be arranged at the first fuel tank inner side the second fuel tank (13), be arranged at the first opening and for making the first fuel tank and the second fuel tank (13) become the lid component (8) of air-tight state.Lid component possesses and has the Part I (8A) of the bearing surface covering the first opening, relative to Part I is the Part II (8C) that extends of tubular towards the inner side of the first fuel tank.In the way of being clipped between the first opening edge (103) and the contact surface of Part I, the first containment member (104) is set.Second containment member (114) with flexibility is set in the way of erection between the second opening edge (45A) and Part II.

Description

The sealing structure of fuel tank

Technical field

The present invention relates to the sealing knot of a kind of fuel tank used in the fuel supply system of internal combustion engine Structure.

Background technology

Patent Document 1 discloses a kind of fuel supply system, its will such as contain ethanol petrol that The crude fuel of the composition different containing octane number of sample be separated into more comprise compared with crude fuel pungent The antiknock gasoline of the composition that alkane value is high and more to comprise octane number compared with crude fuel low The low ron fuel of composition, and by antiknock gasoline and low ron fuel optionally to internal combustion Machine supplies.

The fuel supply system of patent documentation 1 has the crude fuel case of storage crude fuel, is divided by crude fuel From becoming antiknock gasoline and the segregation apparatus of low ron fuel and storing antiknock gasoline Antiknock gasoline case.Segregation apparatus have crude fuel is heated heater, will heating after Crude fuel is separated into antiknock gasoline and low octane by employing separation being impregnated with evaporating method of film The separator of value fuel and the cooler that each fuel after separating is cooled down respectively.

According to the fuel supply system of patent documentation 1, when making internal combustion engine operate with high compression ratio, The ratio making the antiknock gasoline to combustor injection improves, and it is possible to suppress pinking.

Citation

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2011-208541 publication

The problem that invention is to be solved

In the fuel supply system of patent documentation 1, in addition to crude fuel case, also have and include point From segregation apparatus and the antiknock gasoline case of device, heater and cooler, therefore, it is difficult to by above-mentioned respectively Device is configured at the vehicle body of motor vehicles efficiently.It addition, there is a problem in that: include owing to arranging Segregation apparatus, crude fuel case, antiknock gasoline case and the company of separator, heater and cooler etc. Connecing their joint, thus the scope spilling countermeasure having to implement fuel vapo(u)r increases, device becomes Obtain complicated, and make cost increase.

In order to solve this problem, present applicant obtains and antiknock gasoline case is arranged at former combustion The idea of the such novelty in inner side of hopper.According to the method, even if fuel vapo(u)r fires from high-octane rating Hopper, segregation apparatus and connect their joint etc. and spill, fuel vapo(u)r spill destination also for former In fuel tank, therefore can also reduce the position spilling countermeasure that should implement fuel vapo(u)r.

But, in the case of the inner side that antiknock gasoline case is arranged at crude fuel case, the most really The sealing property protecting antiknock gasoline case and crude fuel case becomes problem.

Summary of the invention

The present invention, in view of above background, its object is to, it is provided that a kind of inner side at the first fuel tank It is provided with in the fuel supply system of the second fuel tank, it can be ensured that the first fuel tank and the second fuel tank The sealing structure of the fuel tank of sealing property.

For solving the scheme of problem

In order to solve above-mentioned problem, the invention of (1) relates to the sealing structure of a kind of fuel tank, and it is used for Fuel supply system, described fuel supply system possesses: the first fuel tank, and it has the first opening； Second fuel tank, it has the second opening, and does not puts in the inner side of described first fuel tank；And lid Component, it is arranged at described first opening, is used for making described first fuel tank and described second fuel tank Becoming air-tight state, the main of sealing structure of described fuel tank is characterised by, described lid component has Standby: there is the Part I of the bearing surface covering described first opening；And relative to this Part I It is the Part II of tubular extension towards the inner side of described first fuel tank, the sealing knot of described fuel tank Structure is also equipped with: the first containment member, and it is arranged to be clipped in the first opening edge forming described first opening Between the described bearing surface of the described Part I that portion and described lid component are had；And second seal Component, it is arranged to be erected at the second opening edge forming described second opening and described lid component Between described Part II, described second containment member has flexibility.

In the invention of (1), it is arranged to be clipped in the first opening edge forming the first opening and lid structure The first containment member between the bearing surface of the Part I that part is had makes the first fuel tank become close Closed state, on the other hand, is arranged to be erected at the second opening edge forming the second opening and lid component The second containment member between the Part II being had makes the second fuel tank become air-tight state.

According to the invention of (1), it is provided with the fuel supply of the second fuel tank in the inner side of the first fuel tank In device, it is possible to reliably ensure that the first fuel tank and the sealing property of the second fuel tank.It addition, by In the second containment member, there is flexibility, so even relative between the second opening edge and Part II Distance produces a little variation, and second containment member with flexibility also is able to absorb this variation neatly Amplitude such that it is able to expect to be maintained the second fuel tank the effect of air-tight state.

It addition, the invention of (2) is characterised by, the vertical section of described second containment member is formed as ripple Type shape.

According to the invention of (2), owing to the vertical section of the second containment member is formed as wave mode shape, because of Even if the relative distance between this second opening edge and Part II produces bigger variation, pass through The second containment member making vertical section be formed as wave mode shape stretches according to variation, the most also can Enough absorb this amplitude of fluctuation neatly such that it is able to expect the second fuel tank is maintained air-tight state Effect.

It addition, the invention of (3) is characterised by, described first fuel tank storage crude fuel, described the Two fuel tanks are stored by the separator arranged in the inner side of described first fuel tank from described crude fuel Isolated, more comprise compared with described crude fuel the high composition of octane number high-octane rating combustion Material.

Invention according to (3), it is possible to obtain supplying both crude fuel and antiknock gasoline Fuel supply system.

Invention effect

According to the present invention, it is provided with the fuel supply system of the second fuel tank in the inner side of the first fuel tank In, it is possible to reliably ensure that the first fuel tank and the sealing property of the second fuel tank.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the fuel supply system generally representing embodiments of the present invention.

Fig. 2 is the axonometric chart of crude fuel case viewed from above.

Fig. 3 is the axonometric chart observing crude fuel case from below.

Fig. 4 is the upward view of the vehicle-mounted state representing fuel supply system.

Fig. 5 is bracket and the exploded perspective view of antiknock gasoline case.

Fig. 6 be perspective crude fuel case and bracket viewed from above, subframe, antiknock gasoline case and The axonometric chart of segregation apparatus.

Fig. 7 be perspective crude fuel case and observe from below bracket, subframe, antiknock gasoline case and The axonometric chart of segregation apparatus.

Fig. 8 is the longitudinal section observing fuel supply system from rear.

Fig. 9 is that the vertical profile of the sealing structure representing the fuel tank near the first opening and the second opening regards Figure.

Figure 10 is the axonometric chart observing the second containment member from oblique upper.

Symbol description:

1 fuel supply system

2 crude fuel casees (the first fuel tank)

5 first openings

8 second lids (lid component)

8A main part (Part I)

8C the second side of sidewall portion (Part II)

13 antiknock gasoline casees (the second fuel tank)

45 second openings

45A circumference (the second opening edge)

103 inward flange (the first opening edge)

104 first containment members

114 second containment members

Detailed description of the invention

Hereinafter, referring to the drawings, the fuel supply system of embodiments of the present invention is illustrated.Figure 1 is the schematic diagram of the fuel supply system generally representing embodiments of the present invention.

As it is shown in figure 1, the fuel supply system 1 of the present embodiment of the present invention is equipped on motor vehicles (not Diagram), supply fuel to the internal combustion engine 84 being equipped on this motor vehicles.In the following description, will combustion Material feedway 1 is equipped on the state of motor vehicles as benchmark to determine all directions.It addition, crude fuel Refer to comprise the fuel of the different composition of octane number, comprise and such as the alcohol such as ethanol are mixed in gasoline and form Fuel combination (such as containing ethanol petrol).Antiknock gasoline refers to compared with crude fuel the most Ground contains the fuel of the high composition of octane number, and low ron fuel refers to more contain compared with crude fuel There is the fuel of the composition that octane number is low.In the case of crude fuel is containing ethanol petrol, high-octane rating Fuel mainly comprises ethanol, and low ron fuel comprises the gasoline that ethanol amount (concentration) reduces.

As it is shown in figure 1, fuel supply system 1 has crude fuel case 2 (first combustion of storage crude fuel Hopper).In the present embodiment, crude fuel case 2 is by resin formation.The shape of crude fuel case 2 can Arbitrarily to set.As shown in FIG. 1 to 3, crude fuel case 2 have be spaced apart distance and opposed Upper wall 2A and diapire 2B, upper wall 2A and diapire 2B periphery arrange sidewall 2C, and including Formation space, portion.In the present embodiment, height (height of the sidewall 2C) shape of crude fuel case 2 Become smaller, in flat pattern.It addition, crude fuel case 2 is when being equipped on motor vehicles, Length on left and right directions is formed long than the length on fore-and-aft direction.

As shown in Figure 4, crude fuel case 2 is arranged in the vehicle body of bottom of the body frame constituting motor vehicles The lower section of bottom 200.Body bottom 200 is included in the rear base of vehicle body along a pair front and back extended Afterframe, be erected between afterframe and along left and right extend multiple crossbeams and by afterframe and crossbeam The rear base plate etc. of the tabular on the ground of supporting and composition car room.

As shown in Figure 2 to 4, the outer surface at the sidewall 2C of the left and right of crude fuel case 2 is dashed forward respectively Go out to be provided with the bonding pad 2D of tabular.Each bonding pad 2D is fastened by bolt and is linked to body bottom 200。

It addition, crude fuel case 2 is supported on body bottom 200 by case supporting member 201.In this enforcement In mode, case supporting member 201 is the ribbon-shaped members (case band) such as formed by metal, as it Front end and the rear end at two ends be combined with body bottom 200, and along the diapire 2B of crude fuel case 2 Lower surface (outer surface) extends forwards, backwards.Thus, crude fuel case 2 by case supporting member 201 end of from The lower section of wall 2B supports.The combining form of case supporting member 201 and body bottom 200 also may be used To be fastening link based on bolt etc. or welding etc..On the left and right directions of the lower surface of diapire 2B Substantially central portion be arranged with along the dump tank 2E that front and back extends.Case supporting member 201 and dump tank 2E is fitted together to, and extends along dump tank 2E.By making case supporting member 201 chimeric with dump tank 2E, Thus the relative displacement of case supporting member 201 and crude fuel case 2 is limited.

As shown in FIG. 1 to 3, the upper wall 2A at crude fuel case 2 is respectively formed with this upper wall 2A The opening 4 of the circular shape that through-thickness is through and the first opening 5.As it is shown in figure 1, opening 4 by first lid 7 blocking and can opening and closing, the first opening 5 by second lid 8 blocking and can opening and closing. It addition, be provided with for the fuel feed pump 9 from outside supply crude fuel at upper wall 2A.

As it is shown in figure 1, in fuel supply system 1, have in the inside of crude fuel case 2: as former The bracket 11 of the frame member of fuel tank 2；Crude fuel is separated into antiknock gasoline and low octane rating The segregation apparatus 12 of fuel；Store the higher octane of the antiknock gasoline after being separated by segregation apparatus 12 Value fuel tank (the second fuel tank) 13；And by a part for segregation apparatus 12 relative to crude fuel Case 2 carries out the subframe 14 supported.

Segregation apparatus 12 comprises separator 17, condenser 18, buffering as main composition key element Case the 19, first heat exchanger 21～the 3rd heat exchanger 23, fuel circulating pump 25, vacuum pump 26 (negative pressure pump).Separator 17 and condenser 18 are bonded to each other, and constitute separator unit 20.Separate Separator 17 in device 12, condenser 18, baffle-box the 19, first heat exchanger 21 and second Heat exchanger 22, fuel circulating pump 25, vacuum pump 26 are arranged in inside and the Gaoxin of crude fuel case 2 The outside of alkane value fuel tank 13, the 3rd heat exchanger 23 is arranged in the interior of antiknock gasoline case 13 Portion.

It addition, fuel supply system 1 is at the inside of crude fuel case 2 and antiknock gasoline case 13 Outside has the fuel of the outside that would be stored at the inside of crude fuel case 2 and antiknock gasoline case 13 (crude fuel) is to internal combustion engine 84 pressure-feed crude fuel pump 28, and fuel supply system 1 has The antiknock gasoline having the inside that would be stored at antiknock gasoline case 13 is defeated to internal combustion engine 84 pressure The antiknock gasoline pump 29 sent.

As shown in Figure 6 to 8, subframe 14 has the base portion 14A of composition bottom, from base portion 14A Upward and side extend the first arm 14B and from base portion 14A upward and with the first arm The second arm 14C that side contrary for 14B extends, is shaped generally as Y-shaped shape.Base portion 14A shape Becoming the cylindrical shape vertically extended, be provided with base plate 14E in its lower end, this base plate 14E is in central authorities' shape Become to have the embedded hole 14D of the toroidal as through hole.Subframe 14 is formed by metal.

Subframe 14 is via the coupling member 31 assembled in the lower end of base portion 14A and crude fuel case 2 The inner surface (upper surface) of diapire 2B combines.Coupling member 31 is formed as one end and has base plate 31A Have round-ended cylinder shape (cup-shaped), be fitted together to the lower end of base portion 14A in inner side, thus coupling member 31 fills It is assigned in subframe 14.Base plate 31A inner surface be centrally formed chimeric with embedded hole 14D Cylindrical portion 31B.Cylindrical portion 31B is expanded by crude fuel infiltration, and the engaging with embedded hole 14D becomes more Add firmly.

The base portion 14A of subframe 14 is arranged in the diapire of crude fuel case 2 via coupling member 31 The upper surface of 2B, and it is arranged in the lower part overlapping with case supporting member 201 of vertical view.Specifically, By subframe 14 relative to former in the way of the center of the lower base portion 14A of vertical view is overlapping with coupling member 31 Fuel tank 2 configures.Outer surface (lower surface) deposition of coupling member 31 is in the upper surface of diapire 2B.

First arm 14B and the second arm 14C with overlook under along the extension with case supporting member 201 The mode in the direction that direction is substantially orthogonal, i.e. with the side orthogonal with the case supporting member 201 front and back extended From base portion 14A, to the left and right extends formula.First arm 14B supporting separator unit 20 (point From device 17 and condenser 18), the second arm 14C supports vacuum pump 26.Separator unit 20 and true Empty pump 26 is the parts that in segregation apparatus 12, weight ratio is bigger.First arm 14B and separator unit Such as link mechanism by fastenings such as screws between 20, between the second arm 14C and vacuum pump 26 to divide Do not combine.

So that the gravity allocation of the separator unit 20 be combineding with each other, vacuum pump 26 and subframe 14 exists Overlook the lower position the most overlapping with base portion 14A, more preferably be arranged in overlapping with the center of base portion 14A The mode of position, adjusts the first arm 14B and the length of the second arm 14C.Thus, supporting separates The subframe 14 of device unit 20 and vacuum pump 26 can on diapire 2B self uprights.As a result of which it is, The load of separator unit 20, vacuum pump 26 and subframe 14 from base portion 14A via coupling member 31 put on downward diapire 2B.From separator unit 20, vacuum pump 26 and subframe 14 to The load that diapire 2B applies is supported by the case supporting member 201 of the underface being positioned at base portion 14A.

Bracket 11 is from inner side supporting crude fuel case 2 and the master of the deformation as suppression crude fuel case 2 Framework and the component of function.As shown in Fig. 1, Fig. 5, Fig. 6, bracket 11 has the first component The second component 11B that 11A and the first component 11A combines.In the present embodiment, the first component 11A and second component 11B is respectively by resin formation.

Edge is front and back and left and right extends in crude fuel case 2 for first component 11A of bracket 11.Such as Fig. 1 Shown in, the first component 11A has the box-shaped forming depression, the downward recess of opening upward One-tenth portion 34.As it is shown in figure 1, case forming portion 34 have upper wall 35, from the periphery of upper wall 35 towards The upside sidewall 36 that lower section is extended.At the elongated end (lower end) of upside sidewall 36, outwards it is formed The upper flange 37 that side is extended.The extension end face (lower surface) of upside sidewall 36 and upper flange 37 form downward upside faying face.

As it is shown in figure 1, second component 11B has lower wall 41 and from the periphery of lower wall 41 upward The downside sidewall 42 extended, is formed towards the box-shaped (dish type) of upper opening.At downside sidewall The elongated end (upper end) of 42, is formed with the lower side flange 43 extended laterally.Downside sidewall 42 Extension end face (lower surface) and lower side flange 43 form downside faying face upwards.

Case forming portion 34 and second component 11B are formed as the shape corresponded to each other, by making box-shaped become The upside faying face in portion 34 is combined with the downside faying face of second component 11B, thus in case forming portion Formed between 34 and second component 11B and close space.Antiknock gasoline case 13 is by case forming portion 34 Divide with second component 11B and formed.That is, antiknock gasoline case 13 is at least formed one by bracket 11 Part.In the present embodiment, under the upside faying face of case forming portion 34 and second component 11B Side faying face is the most horizontally extending, and by deposition each other.

Upper wall 35 in the case forming portion 34 forming antiknock gasoline case 13 is formed this upper wall Second opening 45 of the circular shape that 35 through-thickness are through.Second opening 45 with at crude fuel The described first opening 5 substantially arranged coaxial formed on case 2.

First component 11A of bracket 11 has the recess 47 of opening upward.In recess 47 It is configured with fuel circulating pump 25.Recess 47 is arranged near the diapire 2B of crude fuel case 2, generally Time in recess 47 be full of crude fuel.Because of the acceleration and deceleration of vehicle, turning etc., crude fuel is being applied with During inertia force, recess 47 suppresses the movement of crude fuel and the former combustion of holding around fuel circulating pump 25 Material, maintains fuel circulating pump 25 under the liquid level of crude fuel.It addition, the first component 11A has The multiple plates vertically extended, send out as the barrier of the movement hindering crude fuel to cause because of inertia force Wave function.

Bracket 11 have that the inner surface (lower surface) of the upper wall 2A with crude fuel case 2 abuts on support Connect portion 48 and the lower abutting part 49 abutted with the inner surface of diapire 2B (upper surface).Upper abutting part 48 and lower abutting part 49 respectively at least provided with one.Upper abutting part 48 deposition in upper wall 2A, under support Connect portion 49 deposition in diapire 2B.In the present embodiment, upper abutting part 48 is formed at the first component 11A, lower abutting part 49 is formed at the first component 11A and second component 11B.

The upper surface of the upper wall 35 being formed at case forming portion 34 at least partially of upper abutting part 48, The lower surface of the lower wall 41 being formed at second component 11B at least partially of lower abutting part 49.Thus, The case forming portion 34 and the second component 11B that form antiknock gasoline case 13 are clamped in crude fuel case Between the upper wall 2A and diapire 2B of 2, it is suppressed that the upside faying face of case forming portion 34 and the second structure Opening between the downside faying face of part 11B.It addition, suppress upper wall 2A and the end by bracket 11 The deformation of wall 2B and relative displacement, it is suppressed that the deformation of crude fuel case 2.

Bracket 11 configures in the way of surrounding separator unit 20 and vacuum pump 26, suppresses to separate Device unit 20 and vacuum pump 26 are relative to the displacement of crude fuel case 2.It should be noted that bracket 11 Configure in the way of surrounding separator unit 20 and the side of vacuum pump 26 and top, separator unit 20 and the load of vacuum pump 26 mainly apply to subframe 14 compared with bracket 11.

As it is shown in figure 1, the crude fuel being stored in crude fuel case 2 is added by fuel circulating pump 25 Pressure, carries out pressure conveying towards separator 17.Fuel circulating pump 25 is being connected with separator 17 Conduit 61 route on, configure condenser the 18, first heat exchange successively from fuel circulating pump 25 side Device 21 and the 3rd heat exchanger 23.From the pressure-feed crude fuel of fuel circulating pump 25 at condenser 18, the first heat exchanger 21 and the 3rd heat exchanger 23 carry out heat exchange, be thus stored in ratio The state that the crude fuel of the bottom in crude fuel case 2 heats up supplies to separator 17.Condenser 18, The detailed content of the first heat exchanger 21 and the 3rd heat exchanger 23 is described below.

Crude fuel is separated into higher octane based on through evaporating method (seepage slope: PV) by separator 17 Value fuel and low ron fuel.Separator 17 has makes the antiknock component in crude fuel select Property the separation film 17A that passes through and by separating the first Room 17B and the second Room 17C that film 17A divides. The polymeric membrane separating film 17A e.g. atresia or the inoranic membrane of the minute aperture with molecular level, root Suitably select according to the composition separated from crude fuel.Such as, it is the feelings containing ethanol petrol at crude fuel Under condition, separate film 17A can select to make ethanol and aromatic series optionally through film.

Will be by condenser the 18, first heat exchanger 21 and the 3rd heat exchange by fuel circulating pump 25 The crude fuel of the High Temperature High Pressure after device 23 is to the first Room 17B supply of separator 17.Second Room 17C Reduced pressure by vacuum pump 26 described later.Thus, it is supplied in the crude fuel of the first Room 17B Antiknock component becomes gas and passes through and separate film 17A, is captured by the second Room 17C.Therefore, The fuel of two Room 17C becomes the higher octane more comprising the high composition of octane number compared with crude fuel Value fuel.On the other hand, the crude fuel of the first Room 17B it is supplied to more to the outlet side of the first Room 17B Advancing, the composition that octane number is high is separated, and becomes that more to comprise octane number compared with crude fuel low The low ron fuel of composition.In the case of crude fuel is containing ethanol petrol, by the second Room 17C The antiknock gasoline of capture mainly comprises ethanol, is comprised by the low ron fuel of the first Room 17B The gasoline that ethanol amount (concentration) reduces.

Preferably condenser 18 is adjacent to the second Room 17C of separator 17.In the present embodiment, As shown in Figure 6 to 8, separator 17 is formed as the cylindrical shape that axis is horizontally extending, condensation Device 18 is formed as flat box-shaped.Condenser 18 is combined with the bottom of separator 17, separator 17 And condenser 18 is configured to a separator unit 20.Separator unit 20 at condenser 18 with First arm 14B of subframe 14 combines.

As it is shown in figure 1, in condenser 18, from the high-octane rating of the gas of the second Room 17C supply Fuel carries out heat exchange with the crude fuel from fuel circulating pump 25 supply.By this heat exchange, gas Antiknock gasoline cooled and condense, crude fuel is heated.

Condenser 18 is connected with antiknock gasoline case 13 by conduit 62.Route at conduit 62 It is provided with baffle-box 19.Condenser 18 is arranged in and leans on than baffle-box 19 and antiknock gasoline case 13 The position of top, baffle-box 19 is arranged in than antiknock gasoline case 13 position by the top.In detail For, so that the liquid level in condenser 18 is positioned at the liquid level than baffle-box 19 and antiknock gasoline case The liquid level of 13 position by the top and make the liquid level of baffle-box 19 be positioned at than antiknock gasoline case 13 The mode of liquid level position by the top, set condenser 18, baffle-box 19 and antiknock gasoline The position relationship of case 13.Additionally, it is preferred that separator 17 is arranged in than baffle-box 19 and high-octane rating Fuel tank 13 position by the top.By condenser 18, baffle-box 19 and antiknock gasoline case The position relationship of 13, becomes the antiknock gasoline of liquid under gravity in condenser 18 Flow to baffle-box 19, flow to antiknock gasoline case 13 from baffle-box 19 further.

In conduit 62, the part that condenser 18 is connected with baffle-box 19 is provided with only allow from Condenser 18 is towards the first check valve 64 of the flowing of the fluid of baffle-box 19.It addition, at conduit In 62, only allow from buffering the part that baffle-box 19 is connected with antiknock gasoline case 13 is provided with Case 19 is towards the second check valve 65 of the flowing of the fluid of antiknock gasoline case 13.

The air entry of vacuum pump 26 is connected via the gas phase portion of conduit 67 with the top of baffle-box 19. The air vent of vacuum pump 26 is connected via the bottom of conduit 68 with antiknock gasoline case 13.Take seriously When empty pump 26 drives, via conduit 67,68 by the gas on the top of baffle-box 19 to high-octane rating Fuel tank 13 carries, thus baffle-box 19 is depressurized.Be depressurized by baffle-box 19, promote from Condenser 18 is towards the flowing of the fluid of baffle-box 19, and the first check valve 64 is opened, with baffle-box The condenser 18 of 19 connections and the second Room 17C of separator 17 are depressurized.Now, by buffering Case 19 is depressurized, and the second check valve 65 is closed, and antiknock gasoline case 13 is not depressurized.

The conduit 67 that vacuum pump 26 connects with baffle-box 19 is had the branched pipe 69 of branch.Branch The leading section of pipe 69 connects with the gas phase portion of crude fuel case 2.In the present embodiment, constituting The case forming portion 34 of the first half of antiknock gasoline case 13 is provided with antiknock gasoline case 13 The communicating pipe that the internal gas phase portion in top connects with the gas phase portion on the top of crude fuel case 2 70, branched pipe 69 was connected with communicating pipe 70, via the gas phase portion of communicating pipe 70 with crude fuel case 2 Divide connection.There is communicating pipe 70 inner surface one end close to configuration of upper wall 2A with crude fuel case 2 And with the inner surface of the upper wall 35 of antiknock gasoline case 13 close to the other end of configuration.Such as Fig. 6 and Shown in Fig. 7, the end of crude fuel case 2 side of communicating pipe 70 is in the center upper portion portion of crude fuel case 2 And the neighbouring configuration of float-controlled valve 129 described later.

As it is shown in figure 1, be provided with the open and close valve 72 as electromagnetic valve on the route of branched pipe 69.Open Valve closing 72 is closed when reducing pressure baffle-box 19.When open and close valve 72 is opened, crude fuel case 2 Interior gas flows into baffle-box 19 via communicating pipe 70, branched pipe 69 and conduit 67, baffle-box Pressure in 19 becomes equal with the pressure in crude fuel case 2.By the liquid in baffle-box 19 Antiknock gasoline, when antiknock gasoline case 13 carries, stops vacuum pump 26 and opens opening and closing Valve 72, thus releases the decompression in baffle-box 19, and antiknock gasoline is postponed under gravity Rushing case 19 to move to antiknock gasoline case 13 effluent, the second check valve 65 is opened.

The outlet of the first Room 17B of separator 17 is via conduit 74 and the space in crude fuel case 2 Bottom connects.On the route of conduit 74, from separator 17 side, it is sequentially provided with the first heat exchanger 21, the second heat exchanger 22, filter 75 and pressure-regulating valve 76.

First heat exchanger 21 makes the temperature ratio supplied to separator 17 from fuel circulating pump 25 relatively low Crude fuel with compare high low ron fuel by the temperature after separator 17 and carry out heat exchange. First heat exchanger 21 can be known reverse-flow heat exchanger.By the first heat exchanger 21 In heat exchange, be heated by point to the crude fuel that separator 17 supplies from fuel circulating pump 25 Low ron fuel after device 17 is cooled.

Second heat exchanger 22 have for use by separator 17 after temperature higher low octane rating combustion Expect the inner space passed through and the outer surface contacted with the inner surface in the wall portion of crude fuel case 2, make low pungent Alkane value fuel carries out heat exchange with the wall portion of crude fuel case 2.In the present embodiment, the second heat exchange Device 22 is formed as flat lamellar, and the inner surface being configured to the diapire 2B with crude fuel case 2 contacts. In the present embodiment, the first heat exchanger 21 and the second heat exchanger 22 be combined with each other, and are configured to One unit.

Outer surface at the diapire 2B of crude fuel case 2 is provided with multiple fin 81 and fan 82.Former combustion The diapire 2B of hopper 2 is supplied by the traveling wind of motor vehicles and fan 82 carrying fuel supply system 1 Air cooling.

It is being removed different by the low ron fuel after the second heat exchanger 22 by filter 75 After thing, by pressure-regulating valve 76, the bottom in crude fuel case 2 releases, and mixes with crude fuel Close.By low ron fuel is mixed with crude fuel, thus the octane of the fuel in crude fuel case 2 Value reduces.When the circulation (being increased by the total amount of the crude fuel of separator 17) separated is carried out, The octane number of the fuel in crude fuel case 2 reduces, close to the composition of low ron fuel.Pressure adjusts Valve 76 adjust from fuel circulating pump 25 to the route of pressure-regulating valve 76 in crude fuel and low octane The pressure of value fuel, is maintained regulation by the pressure of the crude fuel of the first Room 17B of separator 17 Pressure.Specifically, pressure-regulating valve 76 is (low at the crude fuel boosted by fuel circulating pump 25 Octane fuel) become more than the pressure of regulation in the case of, by crude fuel (low ron fuel) Release in crude fuel case 2, pressure is maintained setting.

3rd heat exchanger 23 is to make from fuel circulating pump 25 to the pressure-feed former combustion of separator 17 Material carries out the device of heat exchange with the high temperature thermal medium being externally supplied from crude fuel case 2, as to former The heater that fuel carries out heating uses.3rd heat exchanger 23 can be known reverse-flow Heat exchanger.High temperature thermal medium to the 3rd heat exchanger 23 supply can for example be by internal combustion engine 84 and heat up cooling water, the lubricating oil heated up by internal combustion engine 84, variator, automatic fluid Liquid that (automatic fluid) and the waste gas with internal combustion engine 84 carry out heat exchange and heats up, waste gas Deng.High temperature thermal medium in present embodiment is the cooling water of internal combustion engine 84, cold with internal combustion engine 84 But the medium conveying pipe 134 of water passage 85 connection is connected with the 3rd heat exchanger 23.

As it is shown in figure 1, be through with crude fuel pump 28 and the first of internal combustion engine 84 on the first lid 7 The first fuel line 122, the holding wire comprising crude fuel pump 28 and the power line that ejector 121 connects First cable bundle (the most not shown), by the gas phase portion on the top of crude fuel case 2 and fuel feed pump 9 Breather 124 that upstream end thereof connects and by the gas phase portion on the top of crude fuel case 2 and tank 125 The steam pipe 126 connected.First fuel line the 122, first cable bundle, breather 124 and steam pipe First lid 7 through parts are sealed to airtight conditions by 126.

When carrying out fuel feeding by fuel feed pump 9, breather 124 makes the gas in crude fuel case 2 to confession Oil pipe 9 loss, promotes the crude fuel inflow to crude fuel case 2.Steam pipe 126 makes crude fuel case 2 Pressure in crude fuel case 2, to tank 125 loss, is maintained atmospheric pressure by interior fuel vapo(u)r.Conveying Fuel vapo(u)r in tank 125 is absorbed storage by the activated carbon in tank 125.Storage is absorbed by tank 125 Fuel be inhaled into by the negative pressure of air suction way 128 when the operating of internal combustion engine 84, burning Burn in room.End in the crude fuel case 2 of steam pipe 126 is provided with float-controlled valve 129.Float-controlled valve 129 carry out opening and closing according to the liquid level of the crude fuel in crude fuel case 2, prevent liquid fuel towards steam The inflow of pipe 126.

As shown in Fig. 1, Fig. 6 and Fig. 7, float-controlled valve 129 is arranged in the center upper portion of crude fuel case 2 Portion.The center upper portion portion of crude fuel case 2 is the part that plumb position is the highest in crude fuel case, former combustion The liquid level of the crude fuel in hopper 2 is most difficult to arrive.Even if it addition, the center upper portion portion of crude fuel case 2 The sidewall 2C of crude fuel left and right forwards, backwards is made at the inertia force caused because of the acceleration and deceleration of vehicle, turning etc. During side shifting, the liquid level of crude fuel is also difficult to arrive.As it has been described above, communicating pipe 70 is arranged in float The vicinity of the valve 129 i.e. center upper portion portion of crude fuel case 2.Thus, the liquid level of crude fuel is difficult to arrive The end of crude fuel case 2 side of communicating pipe 70, the crude fuel of liquid is pressed down to the inflow of communicating pipe 70 System.

As it is shown in figure 1, be through with antiknock gasoline pump 29 and internal combustion engine 84 on the second lid 8 The second ejector 131 connect the second fuel line 132, comprise the signal of antiknock gasoline pump 29 Second cable bundle (the most not shown) of line and power line, it is used for making high temperature thermal medium in the 3rd heat exchange The medium conveying pipe 134 of circulation in device 23.Second fuel line the 132, second cable bundle and medium conveying Second lid 8 through parts are sealed as airtight conditions by pipe 134.Medium conveying pipe 134 and internal combustion The cooling water path 85 comprising water jacket of machine 84 connects, for leading to than the current of higher temperatures.In the second combustion The ratio second of stockline 132 cover 8 by the part of the second ejector 131 side be configured with in capture fuel different The filter 135 of thing.

In crude fuel case 2 configuration, fuel circulating pump 25, separator the 17, first check valve 64, Baffle-box 19, vacuum pump 26, open and close valve the 72, second check valve the 65, first heat exchanger 21, Two heat exchangers 22, filter 75, pressure-regulating valve 76, crude fuel pump 28 and float-controlled valve 129, Subframe 14 comprises the bracket 11 of antiknock gasoline case 13 with being assembled into one, and constitutes assembly. Subframe 14 is combined with bracket 11 via separator 17 and vacuum pump 26.Bracket 11 and crude fuel The inner surface engaging of case 2, the relative position thus relative to crude fuel case 2 is determined.Constitute and assemble Each device of body is by being assembled in bracket 11, thus respective relative position and relative to crude fuel case 2 Position be determined.

(the sealing structure of crude fuel case 2 and antiknock gasoline case 13)

As in figure 2 it is shown, being formed around from the upper wall 2A of crude fuel case 2 upward at opening 4 The projection 91 of the drum extended.In other words, opening 4 is formed as the endoporus of protruding 91. Outer peripheral face protruding 91 is formed with outer screw section (not shown).As it is shown in figure 1, the first lid 7 shapes Become discoideus, can abut with the extension end face of protruding 91 via containment member (not shown). First lid 7 by with protruding 91 the first housings 92 being spirally connected and be combined with protruding 91.First housing 92 have and can accept the cylindrical portion of protruding 91, are formed at the inner surface of cylindrical portion and with protruding 91 Outer screw section carry out screwing togather female threaded portion (not shown), in one end of cylindrical portion is lateral radially The flange that side is extended.By making the first housing 92 be spirally connected with protruding 91, thus the first lid 7 is by the The flange of one housing 92 is to protruding 91 side pressings, via containment member (not shown) and protruding 91 Extension end face contiguity, by inaccessible for opening 4.

As it is shown in figure 9, be formed with abutting part 48 from this on the upper abutting part 48 of crude fuel case 2 The projection 101 of the drum extended upward.As it is shown in figure 9, at the outer peripheral face of protruding 101 Circumferentially it is formed with outer screw section 102.Extension side end protruding 101 is formed in oriented radial direction The inward flange 103 that side is extended.Inward flange 103 around shape forms the first opening 5.It addition, Inward flange 103 is equivalent to " the first opening edge " of the present invention.

Open as it is shown in figure 9, the upper surface 103a around shape in inward flange 103 becomes with first The plane of the orthogonal axe of mouth 5.Carve at the upper surface 103A of inward flange 103 and be provided with endless groove 103B.Chimeric in this endless groove 103B have the first circular containment member 104.First seals Component 104 is not particularly limited, such as can be by having flexibility, against weather and fuel-resistant permeability Fluorubber system o-ring constitute, it is possible to be close contact in the surface of the object that should seal.

As it is shown in figure 9, the second opening 45 configures in the toroidal substantially coaxial with the first opening 5 Inner side in crude fuel case 2.Be formed from antiknock gasoline case 13 in the second opening 45 is upper Circumference (the second opening edge) 45A of the drum that wall 35 extends downwards.At this periphery The radially inner side of portion 45A is circumferentially arranged with the second containment member 114 (with reference to Fig. 9 and Figure 10) Receiving portion 45A1.Refer to aftermentioned about the second containment member 114.

Second lid 8 has for crude fuel case 2 and antiknock gasoline case 13 are formed as sealed shape The function as " lid component " of state.In order to realize this function, as it is shown in figure 9, the second lid 8 tool Have: substantially main part (Part I) 8A of circular plate shape；And have and the axle of main part 8A Axis that line is roughly the same and the first side wall portion 8B and of substantially cylindrical shape that extends downwards Two side of sidewall portion 8C (Part II).The first side wall portion 8B is arranged on than the second side of sidewall portion 8C by radially The position in outside.It addition, the first side wall portion 8B is formed as the size less for side of sidewall portion 8C than second.

The first side wall portion 8B has and installs the second lid 8 at the first opening 5 relative to crude fuel case 2 Time by second lid 8 to regulation position guide functions.Specifically, as it is shown in figure 9, second covers 8 are positioned at and crude fuel case 2 by the radial outer side in the first side wall portion 8B that mounting is the second lid 8 The first opening 5 in radially inner side face abut position.Now, the lower surface 8A1 of main part 8A The first containment member 104 is clipped and opposed with the upper surface 103A of inward flange 103.

In this condition, the second lid 8 by with protruding 101 the second housings 117 being spirally connected and with projection 101 combine.In order to realize this combination, the second housing 117 has the cylinder that can accept protruding 101 Portion 117A, be formed at cylindrical portion 117A radially inner side face and with protruding 101 outer screw section 102 The female threaded portion 117B screwed togather, the housing side extended to radially inner side from one end of cylindrical portion 117A Flange 117C.

By screwing togather the pin thread 102 of protruding 101 on the female thread 117B of the second housing 117, the Two housings 117 are combined with protruding 101.When the second housing 117 is threadingly advanced relative to protruding 101, The main part 8A of the second lid 8 is pressed to protruding 101 sides by housing side flange 117C.Thus, One containment member 104 is compressed when being contained in the endless groove 103B of inward flange 103, The gap of the lower surface 8A1 and the upper surface 103A of inward flange 103 of main part 8A is carried out close Envelope.As a result of which it is, the first opening 5 is inaccessible by the second lid 8, crude fuel case 2 becomes air-tight state.

Second side of sidewall portion 8C has and cooperates with the second following containment member 114 and make high-octane rating fire Hopper 13 becomes the function of air-tight state.In order to realize this function, in the radial direction of the second side of sidewall portion 8C Outside is circumferentially arranged with receiving portion 8C1 of the second containment member 114 (with reference to Fig. 9 and Figure 10).

Second containment member 114 (with reference to Fig. 9 and Figure 10) has makes antiknock gasoline case 13 become Function for air-tight state.In order to realize this function, as shown in FIG. 9 and 10, second structure is sealed Part 114 have the first peripheral end portion 114A, second week end 114B and by the first peripheral end portion 114A with The linking part 114C of the wave mode shape connected between the 114B of second week end.

As it is shown in figure 9, the first peripheral end portion 114A of the second containment member 114 is and the second opening 45 Circumference 45A engaging (comprising embedding, bonding, deposition) part.First peripheral end portion 114A There is edge, the periphery 114A1 of toroidal, prolong to radial outside from the upper end of edge, periphery 114A1 The flange part 114A2 that stretches out and bloating to radial outside from the midriff of edge, periphery 114A1 First bellying 114A3.Flange part 114A2 be configured to in the circumference 45A of the second opening 45 Upper surface abut.First bellying 114A3 is configured to by the circumference 45A at the second opening 45 Upper recessed receiving portion 45A1 accepts.

As it is shown in figure 9, the second week end 114B of the second containment member 114 and second lid 8 The part of the second side of sidewall portion 8C (Part II) engaging (comprising embedding, bonding, deposition).The Two peripheral end portion 114B have the Inner peripheral portions 114B1 of toroidal, from Inner peripheral portions 114B1 The second bellying 114B2 that abdominal part bloats to radially inner side.Second bellying 114B2 be configured to by Receiving portion 8C1 recessed on second side of sidewall portion 8C of the second lid 8 accepts.

As it is shown in figure 9, the linking part 114C of the second containment member 114 has to antiknock gasoline The outer folding part 114C1 of the outer lateral buckling of case 13 and in the interior lateral buckling of antiknock gasoline case 13 Folding part 114C2.Thus, as shown in FIG. 9 and 10, the vertical section of linking part 114C is formed as ripple Type shape.

Second containment member 114 is not particularly limited, but such as can be by having flexibility, against weather And the material of the fluorubber system of fuel-resistant permeability is constituted.

In the sealing structure of antiknock gasoline case 13 configured as described, as it is shown in figure 9, With the cincture between the second side of sidewall portion 8C at circumference 45A and second lid 8 of the second opening 45 The mode that the gap of shape sets up arranges the second containment member 114 (with reference to Figure 10).That is, the second opening The circumference 45A of 45 and the first peripheral end portion 114A engaging of the second containment member 114, on the other hand, Second side of sidewall portion 8C of the second lid 8 and the second week end 114B engaging of the second containment member 114.

Thus, between the second side of sidewall portion 8C of circumference 45A and second lid 8 of the second opening 45 Inaccessible by the second containment member 114 around the gap of shape, antiknock gasoline case 13 becomes airtight State.

It addition, as shown in FIG. 9 and 10, the vertical profile of the linking part 114C of the second containment member 114 Face is formed as wave mode shape, therefore, even if the size in the described gap around shape produces bigger change Dynamic, by making wave mode shape that the linking part 114C of the second containment member 114 formed according to variation Stretch, also thus be able to absorb this amplitude of fluctuation neatly such that it is able to expect high-octane rating Fuel tank 13 is maintained the effect of air-tight state.

It follows that the action effect of fuel supply system 1 configured as described is illustrated.? In fuel supply system 1, the crude fuel in crude fuel case 2 is pressurizeed by fuel circulating pump 25, successively By condenser the 18, first heat exchanger 21 and the 3rd heat exchanger 23 to the of separator 17 One Room 17B conveying.Now, crude fuel in condenser 18 with the gas of the antiknock gasoline of high temperature Body carries out heat exchange, in the first heat exchanger 21 and by the low octane of the high temperature after separator 17 Value fuel carries out heat exchange, and carries out heat exchange with high temperature thermal medium in the 3rd heat exchanger 23, Thus heat up.

Second Room 17C of separator 17, under the pent state of open and close valve 72, passes through vacuum pump 26 work and are depressurized.In separator 17, in the second Room 17C attraction by vacuum pump 26 Effect and when being depressurized, antiknock gasoline become gas and from the high temperature being supplied to the first Room 17B The crude fuel of high pressure is captured by the second Room 17C by separating film 17A.By the second Room 17C capture The antiknock gasoline of gas flows to condenser 18, in condenser 18 and by fuel circulating pump 25 Crude fuel to separator 17 conveying carries out heat exchange, thus is cooled and condenses.At condenser 18 In condensed antiknock gasoline flow to baffle-box 19 under gravity and store.

When open and close valve 72 is closed and vacuum pump 26 works, the second check valve 65 is closed, and therefore stores The antiknock gasoline that there is the liquid in baffle-box 19 cannot flow to antiknock gasoline case 13. By open and close valve 72 being opened and stopped vacuum pump 26 on the opportunity of regulation, thus baffle-box 19 is interior Portion connects with the inside of crude fuel case 2, makes the inside of baffle-box 19 become atmospheric pressure.Work as baffle-box When becoming atmospheric pressure in 19, the antiknock gasoline in baffle-box 19 under gravity, is opened Second check valve 65 and in antiknock gasoline case 13 flow.So, antiknock gasoline storage In antiknock gasoline case 13.In the case of crude fuel is containing ethanol petrol, antiknock gasoline Case 13 refers to the ethanol case of major storage ethanol.

By the low ron fuel after the first Room 17B of separator 17 in the first heat exchanger 21 It is cooled with being carried out heat exchange by fuel circulating pump 25 to the crude fuel that separator 17 carries, In two heat exchangers 22, the diapire 2B with crude fuel case 2 carries out heat exchange and is cooled.Afterwards, low Octane fuel is released in crude fuel case 2 by filter 75 and pressure-regulating valve 76, with former Crude fuel mixing in fuel tank 2.

In fuel supply system 1, along with the total amount of the crude fuel by separator 17 increases, storage The amount that there is the antiknock gasoline in antiknock gasoline case 13 increases, and contains in crude fuel Low ron fuel ratio increase.By fuel circulating pump 25, vacuum pump 26 and open and close valve 72 Control, it is possible to control the amount by the crude fuel of separator 17.Fuel circulating pump 25, vacuum pump 26 and open and close valve 72 can high-octane rating in liquid level based on antiknock gasoline case 13, crude fuel The concentration of fuel, the run duration etc. of fuel circulating pump 25 control.

In the fuel supply system 1 of present embodiment, by segregation apparatus 12 and antiknock gasoline case 13 inside being arranged in crude fuel case 2, therefore by making crude fuel case 2 become airtight conditions, thus Need not to make segregation apparatus 12, antiknock gasoline case 13 and connect their joint and become airtight shape State, as a result of which it is, the kind of the component requiring airtight conditions can be reduced.

(action effect of the sealing structure of fuel tank)

In the fuel supply system 1 of embodiments of the present invention, as shown in Fig. 1 etc., at crude fuel The inner side of case (the first fuel tank) 2 is provided with antiknock gasoline case (the second fuel tank) 13.Former combustion First opening 5 of hopper 2 and the second opening 45 of antiknock gasoline case 13 are with side coaxially to each other Formula is installed.In its installation procedure, it is possible to produce the axle of the first opening 5 and the second opening 45 is wrong Open, be referred to as the phenomenon of bias.When producing such eccentric phenomena, how to guarantee crude fuel case 2 And the sealing property of antiknock gasoline case 13 becomes problem.

Therefore, in the sealing structure of the fuel tank of embodiments of the present invention, it is used for making crude fuel case (the first fuel tank) 2 and antiknock gasoline case (the second fuel tank) 13 become the work of air-tight state The second lid 8 for " lid component " function has: have the bearing surface of covering the first opening 5 Main part (Part I) 8A；And relative to main part 8A towards crude fuel case 2 inner side in The second side of sidewall portion 8C (Part II) that tubular extends.Be clipped in formed the first opening 5 to convex The edge (the first opening edge) mode between 103 and the bearing surface of main part 8A arranges the first sealing Component 104.With in circumference (the second opening edge) 45A and the second side forming the second opening 45 The mode set up between wall portion 8C arranges second containment member 114 with flexibility.

The sealing structure of fuel tank according to the embodiment of the present invention, makes with the first containment member 104 Crude fuel case (the first fuel tank) 2 becomes air-tight state, and the second containment member 114 makes higher octane Value fuel tank (the second fuel tank) 13 becomes the mode of air-tight state, makes the first containment member 104 And second containment member 114 independently play a role, therefore the inner side at the first fuel tank 2 is provided with In the fuel supply system of the second fuel tank 13, it is possible to reliably ensure that the first fuel tank 2 and second The sealing property of fuel tank 13.

It addition, in the present embodiment, the second containment member 114 has flexibility, such as Fig. 9 and Figure 10 Shown in, the vertical section of the linking part 114C of the second containment member 114 is formed as wave mode shape, therefore, Even if the cincture between the second side of sidewall portion 8C of the circumference 45A of the second opening 45 and second lid 8 The size in the gap of shape produces bigger variation, by making the linking part of the second containment member 114 The wave mode shape that 114C is formed is stretched according to variation, also thus is able to absorb neatly this Amplitude of fluctuation, it is possible to expect to be maintained antiknock gasoline case 13 effect of air-tight state.

It addition, the sealing structure of fuel tank according to the embodiment of the present invention, owing to allowing second to open The gap around shape between second side of sidewall portion 8C of circumference 45A and second lid 8 of mouth 45 Bigger dimensional variations, therefore by the first opening 5 and antiknock gasoline case of crude fuel case 2 In the operation that second opening 45 of 13 is installed in the way of becoming coaxially to each other, it is also possible to expect to relax The effect of its installation accuracy (size management).

(other embodiment)

Embodiments described above is the example of the materialization representing the present invention.Therefore, the present invention Technical scope is not explained by these being defined property of example.The present invention without departing from its purport or Can implement with various forms in the case of its principal character.

Such as, in embodiments of the present invention, enumerate illustrate by with protruding 101 be spirally connected the Second lid 8 is fastened and fixed by two housings 117, thus makes the sealing of the first containment member 104 embody Example, but the invention is not restricted to this example.As long as by by second lid 8 main part 8A to projection 101 sides press and make the sealing of the first containment member 104 embody, then can use any form.

It addition, in embodiments of the present invention, as the first fuel tank, illustrate and describe former combustion Hopper 2, as the second fuel tank, has illustrated and described antiknock gasoline case 13, but the present invention is not It is limited to this example.The present invention can be suitable for, i.e. this fuel tank in all fuel tanks as follows Require to be provided with in the inner side of the first fuel tank the second fuel tank, and use a lid component to seal first First opening of fuel tank and the second opening of the second fuel tank.

Claims (3)

1. a sealing structure for fuel tank, it is used for fuel supply system, described fuel supply system Possess:

First fuel tank, it has the first opening；

Second fuel tank, it has the second opening, and is arranged on the inner side of described first fuel tank；With And

Lid component, it is arranged at described first opening, is used for making described first fuel tank and described second Fuel tank becomes air-tight state,

The sealing structure of described fuel tank is characterised by,

Described lid component possesses: have the Part I of the bearing surface covering described first opening；And It is the Part II that tubular extends towards the inner side of described first fuel tank relative to this Part I,

The sealing structure of described fuel tank is also equipped with:

First containment member, it is arranged to be clipped in the first opening edge and the institute forming described first opening State between the described bearing surface of the described Part I that lid component is had；And

Second containment member, its be arranged to be erected at the second opening edge forming described second opening with Between the described Part II of described lid component,

Described second containment member has flexibility.

The sealing structure of fuel tank the most according to claim 1, it is characterised in that

The vertical section of described second containment member is formed as wave mode shape.

The sealing structure of fuel tank the most according to claim 1 and 2, it is characterised in that

Described first fuel tank storage crude fuel,

Described second fuel tank is stored by the separator arranged in the inner side of described first fuel tank from institute State isolated in crude fuel, more to comprise the high composition of octane number compared with described crude fuel height Octane fuel.