EP3755565A1 - Dispositif de renforcement pour reservoir a carburant - Google Patents
Dispositif de renforcement pour reservoir a carburantInfo
- Publication number
- EP3755565A1 EP3755565A1 EP19703151.1A EP19703151A EP3755565A1 EP 3755565 A1 EP3755565 A1 EP 3755565A1 EP 19703151 A EP19703151 A EP 19703151A EP 3755565 A1 EP3755565 A1 EP 3755565A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- elastic
- tank according
- reservoir
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000002828 fuel tank Substances 0.000 title claims abstract description 15
- 230000002787 reinforcement Effects 0.000 title description 2
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000035939 shock Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract 2
- 239000002131 composite material Substances 0.000 description 13
- 239000000446 fuel Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/03177—Fuel tanks made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K2015/03486—Fuel tanks characterised by the materials the tank or parts thereof are essentially made from
- B60K2015/03493—Fuel tanks characterised by the materials the tank or parts thereof are essentially made from made of plastics
Definitions
- the present invention relates primarily to a reinforcing device for fuel tank.
- the invention finds a particularly advantageous application with hybrid vehicle fuel tanks.
- a fuel tank is generally located under the vehicle frame, particularly near a rear axle. This reservoir is oriented transversely with respect to a longitudinal axis of the motor vehicle.
- a pipe opens on the one hand into the tank and on the other hand into a hatch housing to allow its filling.
- the tank also comprises a gauge-pump module for both measuring the fuel level inside the tank and to route fuel to the injectors by means of a pump, in particular following a request from the engine computer.
- the tank volume of a hybrid vehicle is less (at least half) that of a thermal vehicle.
- the pressure inside the tank will therefore increase more rapidly than in the case of a standard size tank.
- a compartmentalized reservoir is however more complex to achieve and more fragile in case of deformation following an impact.
- the compartmentalized tank since it is more difficult to circulate fuel between the different compartments, the compartmentalized tank requires the use of more complex pumping modules, pressure compensation valves, etc.
- the filling efficiency is also lower than with a standard tank, which limits the vehicle autonomy.
- Another known solution is to use pillars to withstand tensile internal pressure exerted inside the tank.
- the pillars of expansion limitation are ineffective in case of deformation due to shock. Indeed, these pillars are not designed to withstand compression efforts.
- the invention aims to effectively overcome the aforementioned drawbacks by providing a fuel tank including a motor vehicle of the type comprising a shell comprising walls defining a filling compartment, characterized in that the tank comprises in the filling compartment at the less a resilient reinforcing member configured to work in compression in the event of shock to the reservoir and at least one resilient reinforcing member configured to work in tension to limit expansion of the reservoir in case of overpressure.
- the invention thus allows, thanks to the use of at least one elastic reinforcing member working in tension and at least one elastic reinforcing member configured to work in compression, to obtain a reservoir that can withstand both the internal overpressure and deformation of the reservoir occurring especially in case of rear impact. It is thus possible to use single-compartment tanks of simpler design and greater capacity than compartmentalized tanks. In addition, the tank is less sensitive to shock, it can be moved to the rear of the vehicle, which leaves more room to implement the batteries. It would thus be possible to increase the autonomy in electric mode for a fixed vehicle size.
- the reservoir comprises:
- At least one elastic first pusher having an axis oriented in a horizontal plane and transversely to a direction of longitudinal elongation of the reservoir, and
- At least one second elastic pillar having a vertically oriented axis to limit expansion of the tank.
- an elastic pillar comprises a spring
- the spring is a helical blade spring. In one embodiment, the spring has a reduced section of turns in its intermediate portion.
- the spring is fixed by only one of its ends to the shell of the tank.
- the spring is made of a metallic material, or composite, or polymer.
- an elastic pillar comprises a base at at least one of its ends.
- the base has a lattice structure, including a composite blade.
- the reservoir comprises an elastic annular element bearing against the walls of the reservoir.
- the elastic annular element comprises, along its circumference, a plurality of radial arms extending between a central portion and a peripheral annular portion.
- the elastic annular element comprises, along its circumference, a plurality of arcuate blades.
- the reservoir comprises double arcuate blades arranged opposite one another.
- the shell is formed by two half-shells assembled together, in particular along their median plane.
- the invention also relates to a hybrid type of vehicle comprising an electric machine coupled with one of the vehicle trains, including the rear axle, and a fuel tank as previously defined oriented transversely to an axis d longitudinal elongation of the motor vehicle.
- Figure 1 is a schematic representation of a hybrid type of motor vehicle comprising a fuel tank according to the present invention
- Figure 2 is a perspective view of a fuel tank according to the present invention.
- Figure 3 is a side view of a fuel tank according to the present invention.
- Figure 4 is a view of the interior of the tank according to the invention comprising helical leaf springs reinforcement
- Figure 5 is a reduced intermediate section spring used with the tank according to the present invention.
- Figures 6a and 6b are respectively perspective and side views of a fuel tank according to the present invention comprising elastic pillars that can be provided with holding bases;
- Figures 7a and 7b are respectively perspective and side views of a fuel tank according to the present invention comprising springs of polymeric material that can be provided with holding bases;
- Figure 7c is a detailed perspective view of a spring of Figure 7b provided with a base;
- Figure 8 is a perspective view of a fuel tank according to the invention comprising a plurality of small reinforcing springs
- Figures 9 and 10 are perspective views of the interior of a tank according to the invention comprising at least one resilient annular reinforcing element;
- Figure 1 1 is a perspective view of the interior of a tank according to the invention comprising a double arched composite blades system.
- FIG. 1 shows a fuel tank 10 implanted under the chassis 1 1 of the vehicle, in particular near a rear axle 12.
- This hybrid type of vehicle comprises an electric machine 13 coupled with the rear axle 12.
- This machine 13 will be able to operate selectively in motor mode in which it transforms the electrical energy stored in one or more batteries 15 into mechanical energy to ensure the traction of the vehicle, or in generator mode, in particular during a regenerative braking phase in which it transforms the mechanical energy into electrical energy to be stored in the battery (s) 15.
- the tank 10 comprises a shell 14 oriented transversely to an axis X1 longitudinal elongation of the motor vehicle.
- a tubing 16 opens on the one hand into the tank 10 and on the other hand into a hatch housing to allow its filling.
- the reservoir 10 also comprises a pump gauge module 17 for both measuring the level of the fuel inside the tank 10 and conveying fuel to the injectors by means of a pump, in particular following a request from the engine calculator.
- the shell 14 is formed by two half-shells 14.1, 14.2, in this case a lower half-shell 14.1 and an upper half-shell 14.2, assembled between them.
- These half-shells 14.1, 14.2 are preferably assembled along their median plane.
- the median plane extends here horizontally but it could alternatively extend in a vertical plane.
- the half-shells 14.1, 14.2 are made for example of a plastic material which may optionally be reinforced by fibers.
- the half-shells 14.1, 14.2 are advantageously welded together. Alternatively, the half-shells 14.1, 14.2 may be glued together, riveted, or more generally assembled by any other fastening means adapted to the application.
- the shell 14 has walls delimiting preferably a single filling compartment.
- a single-compartment reservoir 10 is of simple construction as opposed to compartmentalized tanks provided with several interconnected compartments which are difficult to make by molding.
- the tank 10 of generally parallelepiped shape has a bottom wall 18.1 and a wall upper 18.2, two longitudinal walls 19.1, 19.2, and two transverse walls 20.1, 20.2.
- the reservoir 10 comprises at least one resilient reinforcing member 23, 30, 38 configured to work in compression in the event of shock to the reservoir 10 and at least comprises at least one elastic reinforcing member. in tension to limit expansion of the tank 10.
- the elastic members are formed by resilient pillars 23.
- the reservoir 10 comprises two resilient pillars 23 having an axis X3 oriented in a horizontal plane and transversely to the direction X2 of longitudinal elongation of the reservoir 10.
- the transverse elastic pillars 23 may bear against the longitudinal walls 19.1, 19.2 of the reservoir 10.
- the transverse elastic pillars 23 are oriented substantially parallel to the longitudinal axis X1 of the vehicle.
- the transverse elastic pillars 23 are intended to compress when the reservoir 10 is subjected to a rear impact force applied along the longitudinal axis X1.
- the reservoir 10 thus has a very good resistance of the entire rear face of the reservoir 10 in case of impact.
- an elastic pillar 23 having a vertically oriented axis X4 makes it possible to limit an expansion of the reservoir 10.
- the vertical elastic pillar 23 can bear against the lower wall 18.1 and the upper wall 18.2 of the tank 10.
- the elastic pillar vertical 23 is intended to work in tension to limit the expansion of the reservoir 10.
- the transverse elastic pillars 23 are arranged for example on either side of the vertical elastic pillar 23.
- the resilient pillars 23 are constituted by helical leaf springs 24 may be made of metal or composite material.
- This type of spring 24 has the advantage of being hollow, so that the fuel circulates inside. There is therefore no loss of volume and this spring 24 has a large contact area with the half-shells 14.1, 14.2 of the tank 10.
- the transverse springs 24 symmetrically support the lower half-shells 14.1 and 14.2 14.2 of the tank 10.
- the springs 24 are stable in compression and effectively resist deformation in case of rear impact.
- the large diameter of the coil spring 24 allows to do without a base at the ends.
- the spring 24 may have a diameter of between 60 mm and 80 mm, and is preferably 70 mm.
- the length of the spring 24 may be between 120 mm and 160 mm, and is preferably 140 mm.
- the transverse springs 24 may be fixed to the walls of the shell 14 by their two ends. Alternatively valid only for a spring 24 provided to work in compression in case of shock suffered by said tank, a spring 24 is fixed to the shell 14 of the tank 10 by one of its ends. The other end will then bear against the shell 14 in case of deformation due to impact.
- the springs 24 are made of composite material, they may be welded directly to the shell 14.
- the springs 24 of composite, in particular long fiber, have satisfactory stiffness characteristics.
- metal springs 24 it is possible to use metal springs 24 but provided to soak them beforehand inside a polymer bath to deposit a thin anticorrosive layer around.
- a spring 24 has a reduced section of turns in its intermediate portion 28.1 and a section of turns increased at the ends 28.2. It has a large contact surface with the internal faces of the half-shells 14.1, 14.2 of the tank 10.
- the stiffness of the spring 24 can be made variable depending on the compression of the spring 24. In this case, the spring 24 will be more and more stiff as it is compressed.
- Figures 6a and 6b illustrate the possibility of providing a base 26 at each end of a spring 24. This is useful for increasing the spring bearing surface 24 having a relatively small diameter.
- pedestals 26 are arranged at the ends of a spring 24 having a diameter of about 50 mm plus or minus 10% around this value.
- the bases 26 may be made of a plastic or composite material.
- the bases 26 may be welded to an inner wall of the shell 14.
- the springs 24 are made of a thick polymeric material having a thickness of between 5 mm and 20 mm, and is preferably 10 mm.
- the springs 24 may be provided with bases 26 at their ends.
- the bases 26 may be made of lattice composite blade to form an elastic assembly.
- the bases 26 may comprise a central sleeve 27 intended to be inserted inside the hollow of the spring 24 delimited by the turns.
- the springs 24 are without base 26 at their ends.
- the number of springs 24 having a diameter smaller than 50 mm is then multiplied.
- At least four springs 24 are preferably used to reinforce the reservoir 10.
- six springs 24 are used, but their number may be adapted as a function of the desired resistance of the reservoir 10.
- an elastic annular element 30 is disposed in abutment against the walls of the reservoir 10.
- This element 30 has an outer diameter substantially equal to that of the reservoir 10.
- the elastic annular element 30 comprises a plurality of radial arms 32 extending between a central portion 33 and a peripheral annular portion 34.
- the elastic annular element 30 may be housed inside a cylinder 31 whose width L is adjustable according to the dimensions of the reservoir 10 and the desired level of resistance.
- the elastic annular element 30 and the cylinder 31 may be made by assembling composite blade elements.
- a multilayer assembly of long fiber composites with a thickness of between 6 mm and 10 mm can be made.
- FIG. 10 The embodiment of Figure 10 is similar to that of Figure 9 except that the elastic annular element 30 has arcuate blades 36 along its circumference.
- a system of four arcuate blades 36 is used in place of the radial arms 32.
- the element 30 comprises two sets of two blades 36 diametrically opposite to each other.
- the four blades 36 are arranged so that they always balance during the deformation.
- the radius of a blade 38 may be between 60 mm and 80 mm, and is preferably 70 mm.
- the height of a blade 38 may be between 40 mm and 60 mm, and is preferably 50 mm.
- the thickness of a blade 38 may be between 2 mm and 8 mm, and is preferably 4 mm.
- Embodiments arched blades 38 have the advantage of being able to undergo large deformations while remaining elastic.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1851420A FR3078026B1 (fr) | 2018-02-20 | 2018-02-20 | Dipositif de renforcement pour reservoir a carburant |
| PCT/FR2019/050023 WO2019162581A1 (fr) | 2018-02-20 | 2019-01-07 | Dispositif de renforcement pour reservoir a carburant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3755565A1 true EP3755565A1 (fr) | 2020-12-30 |
Family
ID=61802214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19703151.1A Withdrawn EP3755565A1 (fr) | 2018-02-20 | 2019-01-07 | Dispositif de renforcement pour reservoir a carburant |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3755565A1 (fr) |
| FR (1) | FR3078026B1 (fr) |
| WO (1) | WO2019162581A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2658720C3 (de) * | 1976-12-24 | 1982-01-28 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5300 Bonn | Latentwärmespeicher zur Aufnahme eines wärmespeichernden Mediums |
| US6135306A (en) * | 1999-02-08 | 2000-10-24 | Salflex Polymers Inc. | Fuel tank anti-deflection device |
| JP2010070097A (ja) * | 2008-09-19 | 2010-04-02 | Toyoda Gosei Co Ltd | 燃料タンクの支持体 |
| DE102010036683A1 (de) * | 2010-07-28 | 2012-02-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Kraftstofftank |
| JP6191725B2 (ja) * | 2013-09-18 | 2017-09-06 | トヨタ自動車株式会社 | 燃料タンク |
| JP6123663B2 (ja) * | 2013-12-10 | 2017-05-10 | トヨタ自動車株式会社 | 燃料タンク |
-
2018
- 2018-02-20 FR FR1851420A patent/FR3078026B1/fr active Active
-
2019
- 2019-01-07 WO PCT/FR2019/050023 patent/WO2019162581A1/fr not_active Ceased
- 2019-01-07 EP EP19703151.1A patent/EP3755565A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3078026B1 (fr) | 2020-10-23 |
| WO2019162581A1 (fr) | 2019-08-29 |
| FR3078026A1 (fr) | 2019-08-23 |
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