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
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
  • B29C2049/2008—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article
  • B29C2049/2013—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article for connecting opposite walls, e.g. baffles in a fuel tank
• • 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
  • B60K2015/03032—Manufacturing of 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
  • B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
  • B60K2015/03453—Arrangements or special measures related to fuel tanks or fuel handling for fixing or mounting parts of the fuel tank together
  • B60K2015/0346—Arrangements or special measures related to fuel tanks or fuel handling for fixing or mounting parts of the fuel tank together by welding
• • 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 to an internal reinforcement element for a vehicle thermoplastic fuel tank, preferably for a hybrid vehicle thermoplastic fuel tank.
• the invention relates also to a vehicle thermoplastic fuel tank comprising said internal reinforcement element and to a method of manufacturing such a vehicle thermoplastic fuel tank.
• Fuel tanks assembled from two thermoplastic shells are known, and may comprise a stabilizing column or wall in the internal volume of the tank in order to limit deformations of the tank.
• T raditionally fuel systems in passenger vehicles are designed to hold a specific amount of liquid fuel at a pressure essentially the same as the ambient pressure.
• Hybrids which are designed such that they could potentially go several months without using fuel, it is in the interest of the system designers to hold pressure inside the fuel tank to limit the emissions that could potentially bleed through the activated carbon canister due to diurnal cycles.
• holding pressure ensures that the composition of the fuel stays the same during storage.
• the tanks must be made resistant to this internal pressure.
• the tank reinforcement can be realized by linking two opposite tank walls with each other using an internal reinforcement element. It is known to form an internal reinforcement element in the form of a pillar or wall using a first pillar or wall part.
• the pillar may be made of two materials, comprising e.g. a first portion made of a first material compatible with High-Density polyethylene (HDPE) and a second portion of a second material having a limited deformation and/or creep.
• HDPE High-Density polyethylene
• the document EP 2 697 090 B1 discloses for example an internal reinforcement element suitable to connect to opposite walls portions of a fuel tank.
• the internal reinforcing element comprises a hollow having a ratio of at least 1 .8 between the diameter of its cross section at its ends and the diameter of its cross section at at least one intermediate point.
• the internal reinforcement element disclosed in the document EP 2 697 090 B1 has a fixed dimension, said internal reinforcement element being manufactured by injection molding using a mold having a standardized size. Moreover, due to its fixed dimension, the internal reinforcement element may be only used for specific thermoplastic fuel tank design, the design of the tank being determined by the mold used during the blow molding process of the tank.
• the document US2018/0141432 A1 discloses an internal reinforcement element for a fuel tank having a column shape including a first portion coupled to a wall of the fuel tank including a plurality of circumferential notches formed by an inner surface and a second portion coupled to a second wall of the fuel tank and including a plurality of angled extensions formed by an outer surface, the plurality of angled extensions shaped to fit within the plurality of circumferential notches.
• Said internal reinforcement element is height adjustable by moving the first portion into the second when the fuel tank is submitted to a difference of pressure between the atmospheric pressure and the pressure of fuel/air within the fuel tank, which is above a threshold. Nevertheless, the adjustment of the height of the internal reinforcement element is performed once the pillar is fixed in the fuel tank and exposed to a high-pressure difference.
• the internal reinforcement element does not comprise any weak point to get the internal reinforcement element break during hi-energy impact.
• the document US 2019/105682 A1 discloses an internal reinforcement element for fuel tank comprising latches connecting two parts of said internal reinforcement element.
• the internal reinforcement element disclosed requires the presence of through holes in the tank walls for its fixation to the tank leading to an increase of the fuel permeation.
• thermoplastic internal reinforcement element comprising a screwing means.
• Said thermoplastic internal reinforcement element comprises a breaking means, which relies to the number of threads that connects a support column to pedestals.
• breaking means is linked to the height of the internal reinforcement element and will depends on the size of the tank.
• a first objective of the present disclosure is to provide an internal reinforcement element, which is adaptable to any tank design.
• a second objective of the present invention is also to provide a manufacturing method of a vehicle thermoplastic fuel tank comprising an internal reinforcement element, preferably for a hybrid vehicle thermoplastic fuel tank comprising an internal reinforcement element.
• an internal reinforcement element for thermoplastic fuel tank for a vehicle wherein said internal reinforcement element comprises at least a first external part provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means wherein the height adjusting means comprises a screwing means comprising a threaded element and a first nut element,
• said internal reinforcement element comprises at least a welding part provided to be welded to the inner surface of a wall of the thermoplastic fuel tank, wherein the welding part is partly overmolded on the first external part and/or on the second external part, preferably the welding part is partly overmolded on the first external part and on the second external part,
• the internal reinforcement element comprises a breaking means, wherein the breaking means is a crack or a slot or a section of the internal reinforcement element having, preferably locally, a smaller diameter in at least one of the external part or inside the threaded element or even in the threads themselves.
• the internal reinforcement element including the height adjusting means allows the internal reinforcement element to be adaptable to different tank designs or to the different locations inside a same tank without a need to redesign the height of the internal reinforcement element.
• the height adjusting means comprises a screwing means, said screwing means comprising at least the threaded elements and the first nut allows by screwing motion to change the height of the internal reinforcement element and so to adapt it to the distance between the two opposite walls of the thermoplastic fuel tank wherein said internal reinforcement element will be fixed. Consequently, the internal reinforcement element according to the invention offers advantageously the possibility to standardize internal reinforcement elements for thermoplastic fuel tank and leads to a cost saving in development time and tooling to design of said element due to its adaptability to thermoplastic fuel tank dimensions.
• a height adjusting means comprising a screwing means permits a more precise height adjustment compared to other means using latches and/or notches for example and offers also an increasing of the resistance of the fuel tank to the stress in a compression mode and in a dilatation mode.
• the internal reinforcement element_according to the invention is provided to be welded to an inner surface of a first wall and a second wall of the thermoplastic fuel tank, said first and second walls being opposite to each other. The welding of the internal reinforcement element on an inner surface of a wall avoids the increasing of the permeation level of the fuel tank compared to assembling of internal reinforcement element requiring the presence of through holes on the tank walls.
• Said welding of the internal reinforcement element is performed using a welding part located on the first and/or the second external part, preferably the first and the second external part, said welding part being partly overmolded on the first and/or the second external part.
• the welding part is partly overmolded on the first and/or the second external part
• the breakage will allow the two opposite walls of the thermoplastic fuel tank connected by the internal reinforcement element to move independently and so to not break during high- energy impact.
• a breaking means is implemented on the internal reinforcement element.
• the breakage means can be made by a section change, preferably locally, in at least one of the external part or inside the threaded element or even in the threads themselves.
• the breakage means can be made by a section change, preferably locally, in at least one of the external part or inside the threaded element or even in the threads themselves”, we intend to mean that a section change of the diameter could occur in the threaded element itself or in in at least one of the external part or even in the threads themselves, said diameter reduction not necessarily coinciding with the smallest diameter of the internal reinforcement element.
• the internal reinforcement element for a thermoplastic fuel tank for a vehicle comprises a blocking means of the screwing means.
• a blocking means is advantageously used to control the requested height of the internal reinforcement element, said blocking means being included in the internal reinforcement element.
• the distance between the first external part and the second external part of the internal reinforcement will decrease by screwing.
• the blocking means will stop the screwing mechanism at the required height of the internal reinforcement element, in other words at the required distance between the first external part and the second external part of the reinforcement internal element.
• the internal reinforcement height is thus warranted even with a manual screwing method.
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the treaded element is a rod.
• first external part and the second external part may be connected by a threaded element, said threaded element being by a rod.
• the rod may be completely threaded or partially threaded.
• the two extremities of the rod are threaded. This allows the rod to be screwed into the first external and the second external parts that integrate a nut element.
• the rod may be partially threaded on one extremity the other being glued to or welded to or a part of the first or the second external part.
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the thread of the threaded element is located on one part of the threaded element.
• the threaded element is located on one part of the threaded element.
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the welding part is made of High-Density polyethylene (HDPE).
• HDPE High-Density polyethylene
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of Polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• PE Polyethylene
• PPS Polyphthalamide
• PA Polyphenylene sulfide
• PK Polyketon
• POM Polyoxymethylene
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the treaded element is located on the first external part.
• the threaded element and the first external part constitute a monobloc structure.
• the internal reinforcement element for thermoplastic fuel tank according to the invention is such that the first nut element is located on the second external part.
• a second object of the invention is to provide a thermoplastic fuel tank for a vehicle comprising at least one internal reinforcement element according to the invention.
• the inventors have noted that the attachment resulting by the link of the two opposite walls of the tank decreases the deformation of the tank regarding the extension due to overpressure inside the tank, or the collapsing due to vacuum inside the tank.
• a third object of the invention is to provide a method of manufacturing a thermoplastic fuel tank for a vehicle comprising at least the steps of:
• the welding of the internal reinforcement element_on an inner surface of a wall avoids the increase of the permeation level of the fuel tank compared to the assembling of an internal reinforcement element requiring the presence of through holes on the tank walls, which simplifies the manufacturing of the thermoplastic fuel tank.
• the step of adjusting the height of the internal reinforcement element by screwing is performed after a step of measuring the thickness of the parison.
• the term "fuel tank” is understood to mean an impermeable tank that can store fuel under diverse and varied environmental and usage conditions. An example of this tank is that with which motor vehicles are equipped.
• the fuel tank according to the invention is made of thermoplastic, that is to say made of a material comprising at least one synthetic resin polymer.
• thermoplastic is understood to mean any thermoplastic polymer, including thermoplastic elastomers, and blends thereof.
• polymer is understood to mean both homopolymers and copolymers (especially binary or ternary copolymers). Examples of such copolymers are random copolymers, linear block copolymers, other block copolymers and graft copolymers. One polymer often employed is polyethylene.
• the tank also comprises a layer of a fuel-impermeable resin such as, for example, EVOH (a partially hydrolyzed ethylene/vinyl acetate copolymer).
• EVOH a partially hydrolyzed ethylene/vinyl acetate copolymer
• the tank may be subjected to a surface treatment (fluorination or sulphonation) for the purpose of making it impermeable to fuel.
• a multilayer fuel tank comprising an EVOH layer between two HDPE layers is successfully used in the frame of the invention.
• the expression “height of the internal reinforcement element” is understood to mean the biggest dimension of the internal reinforcement element, said dimension is preferably the length of the internal reinforcement element.
• Fig. 1 is a vertical cross-section of a first variant of an internal reinforcement element according to the invention.
• Fig. 2 is a vertical cross-section of a second variant of an internal reinforcement element according to the invention.
• Fig. 3 is a vertical cross-section of a third variant of an internal reinforcement element according to the invention.
• Fig. 4 is a vertical cross-section of a fourth variant of an internal reinforcement element according to the invention.
• Fig. 5 is a vertical cross-section of a fifth variant of an internal reinforcement element according to the invention during a step of.adjusting the height of the internal reinforcement element by screwing during the manufacture of a thermoplastic fuel tank.
• Fig. 1 discloses an internal reinforcement element (1 ) for thermoplastic fuel tank for a vehicle according to the invention.
• the internal reinforcement element (1 ) comprises at least a first external part (2) provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part (3) provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means (4).
• the height adjusting means (4) comprises a screwing means (5) comprising a threaded element (50) and a first nut element (51 ). Said first nut element (51 ) is located on the first external part (2).
• the treaded element (50) is a rod (500).
• the thread (53) of the threaded element (50) is located on at least one part of the threaded element (50).
• the screwing means (5) comprises a second nut element (54). Said second nut element (54) is located on the second external part (3).
• the internal reinforcement element comprises a blocking means (52, 55) of the screwing means (4).
• the blocking means (52, 55) is located on the first external part (2) and on the second external part (3).
• the internal reinforcement element (1 ) comprise at least one welding part (6, 7) provided to be welded to the wall of the thermoplastic fuel tank.
• the welding parts (6, 7) are partly overmolded on the first external part (2) and on the second external part (3).
• the first external part (2) and the second external part (3) comprise at least one through hole (56, 57, 58, 59), preferably two through holes, most preferably three through holes, the most preferably four through holes, provided to create a mechanical interconnection between the first external part (2) and the overmolded welding part (6) and between the second external part (3) and the overmolded welding part (7).
• the welding part (6, 7) is made of High Density Polyethyene (HDPE).
• the first external part (2), the second external part (3) and the screwing means (4) are made of a material selected from the group of materials consisting of polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• the internal reinforcement element (1 ) comprises a breaking means (not shown) being a crack or a slot.
• Fig. 2 discloses an internal reinforcement element (1 ) for thermoplastic fuel tank for a vehicle according to the invention.
• the internal reinforcement element (1 ) comprises at least a first external part (2) provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part (3) provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means (4).
• the height adjusting means (4) comprises a screwing means (5) comprising a threaded element (50) and a first nut element (51 ). Said first nut element (51 ) is located on the first external part (2).
• the treaded element (50) is a rod (500).
• the thread (53) of the threaded element (50) is located on the two external part of the threaded element (50).
• the screwing means (5) comprises a second nut element (54). Said second nut element (5) is located on the second external part (3).
• the internal reinforcement element (1 ) comprises at least a blocking means (52, 55) of the screwing means (4).
• the blocking means (52, 55) are located on the treaded element (50) and correspond to the end of the treads (53).
• the internal reinforcement element (1 ) comprise at least one welding part (6, 7) provided to be welded to the wall of the thermoplastic fuel tank.
• the welding parts (6, 7) are partly overmolded on the first external part (2) and on the second external part (3).
• the first external part (2) and the second external part (3) comprise at least rib (60, 61 ), preferably a plurality of ribs (60, 61 ) provided to create a mechanical interconnection between the first external part (2), and the overmolded welding part (6) and between the second external part (3) and the overmolded welding part (7).
• the welding part (6, 7) is made of High Density Polyethyene (HDPE).
• the first external part (2), the second external part (3) and the screwing means (4) are made of a material selected from the group of materials consisting of polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• the internal reinforcement element (1 ) comprises a breaking means (not shown) being a crack or a slot.
• Fig. 3 discloses an internal reinforcement element (1 ) for thermoplastic fuel tank for a vehicle according to the invention.
• the internal reinforcement element (1 ) comprises at least a first external part (2) provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part (3) provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means (4).
• the height adjusting means (4) comprises a screwing means (5) comprising a threaded element (50) and a first nut element (51 ). Said first nut element (51 ) is located on the first external part (2).
• the treaded element (50) is a rod (500).
• the thread (53) of the threaded element (50) is not located on the two extremities of the threaded element (50).
• the screwing means (5) comprises a second nut element (54). Said second nut element (5) is located on the second external part (3).
• the internal reinforcement element (1 ) comprise at least one welding part (6, 7) provided to be welded to the wall of the thermoplastic fuel tank.
• the welding parts (6, 7) are partly overmolded on the first external part (2) and on the second external part (3).
• the first external part (2) and the second external part (3) comprise at least rib (60, 61 ), preferably a plurality of ribs (60, 61 ) provided to create a mechanical interconnection between the first external part
• the welding part (6, 7) is made of High
• HDPE Density Polyethyene
• the screwing means (4) are made of a material selected from the group of materials consisting of polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• the internal reinforcement element (1 ) comprises a breaking means (not shown) being a crack or a slot.
• Fig. 4 discloses an internal reinforcement element (1 ) for thermoplastic fuel tank for a vehicle according to the invention.
• the internal reinforcement element (1 ) comprises at least a first external part (2) provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part (3) provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means (4).
• the height adjusting means (4) comprises a screwing means (5) comprising a threaded element (50) and a first nut element (51 ). Said first nut element (51 ) is located on the first external part (2).
• the treaded element (50) is a rod (500).
• the thread (53) of the threaded element (50) is not located on the two extremities of the threaded element (50).
• the screwing means (5) comprises a second nut element (54). Said second nut element (5) is located on the second external part (3).
• the internal reinforcement element (1 ) comprise at least one welding part (6, 7) provided to be welded to the wall of the thermoplastic fuel tank.
• the welding parts (6, 7) are partly overmolded on the first external part (2) and on the second external part (3).
• the first external part (2) and the second external part (3) comprise at least rib (60, 61 ), preferably a plurality of ribs (60, 61 ) provided to create a mechanical interconnection between the first external part
• the welding part (6, 7) is made of High Density Polyethyene (HDPE).
• the first external part (2), the second external part is made of High Density Polyethyene (HDPE).
• the screwing means (4) are made of a material selected from the group of materials consisting of polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• the internal reinforcement element (1 ) comprises a breaking means (62) which is a part of the rod (500) having a thinner diameter.
• Fig. 5 discloses the positioning of an internal reinforcement element (1 ) according to the invention during a step of adjusting the height of said internal reinforcement element (1 ) by screwing during the manufacture of a thermoplastic fuel tank.
• the internal reinforcement element (1 ) comprises at least a first external part (2) provided to be welded to an inner surface of a first wall of the thermoplastic fuel tank and at least a second external part (3) provided to be welded to an inner surface of a second wall of the thermoplastic fuel tank, the first wall and the second wall being opposite walls of the thermoplastic fuel tank and a height adjusting means (4).
• the height adjusting means (4) comprises a screwing means (5) comprising a threaded element (50) and a first nut element (51 ).
• the treaded element (50) is a rod (500) which constitutes a monobloc structure with the second external part (3).
• the thread (53) of the threaded element (50) is located one extremity of the threaded element (50).
• the internal reinforcement element (1 ) comprises at least a blocking means (52) of the screwing means (4).
• the blocking means (52,) correspond to the end of the tread (53).
• the internal reinforcement element (1 ) comprises at least one welding part (6, 7) provided to be welded to the wall of the thermoplastic fuel tank. The welding parts (6, 7) are partly overmolded on the first external part (2) and on the second external part (3).
• the welding part (6, 7) is made of High Density Polyethyene (HDPE).
• the first external part (2), the second external part (3) and the screwing means (4) are made of a material selected from the group of materials consisting of polyethylene (PE), steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM), preferably the first external part, the second external part and the screwing means are made of a material selected from the group of materials consisting of steel, Polyphthalamide (PPA), Polyphenylene sulfide (PPS), Polyamide (PA), Polyketon (PK) and Polyoxymethylene (POM).
• the internal reinforcement element (1 ) comprises a breaking means (not shown) being a crack or a slot.
• the step of adjusting the height of the internal reinforcement element by screwing during the manufacture of a thermoplastic fuel tank is performed via a tool (8) said tool may be located on the core (9) of blow moulding mould.

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• 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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67658353

Family Applications (2)

Family Applications Before (1)

Country Status (3)

Family Cites Families (9)

• 2019
  • 2019-07-31 EP EP19189444.3A patent/EP3771585A1/de not_active Withdrawn
• 2020
  • 2020-07-31 EP EP20751507.3A patent/EP4003770A1/de active Pending
  • 2020-07-31 WO PCT/EP2020/071685 patent/WO2021019079A1/en unknown
  • 2020-07-31 CN CN202080060541.7A patent/CN114302821A/zh active Pending

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