WO2020121269A1 - Réservoir ayant un tuyau de remplissage et procédé pour sa fabrication - Google Patents

Réservoir ayant un tuyau de remplissage et procédé pour sa fabrication Download PDF

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Publication number
WO2020121269A1
WO2020121269A1 PCT/IB2019/060757 IB2019060757W WO2020121269A1 WO 2020121269 A1 WO2020121269 A1 WO 2020121269A1 IB 2019060757 W IB2019060757 W IB 2019060757W WO 2020121269 A1 WO2020121269 A1 WO 2020121269A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
filler pipe
section
open
hollow portion
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.)
Ceased
Application number
PCT/IB2019/060757
Other languages
English (en)
Inventor
Nazzareno BERTUCCI
Umberto Cornaglia
Giorgio Villata
Andrea Tavella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officine Metallurgiche G Cornaglia SpA
Original Assignee
Officine Metallurgiche G Cornaglia SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Officine Metallurgiche G Cornaglia SpA filed Critical Officine Metallurgiche G Cornaglia SpA
Priority to EP19835738.6A priority Critical patent/EP3894678A1/fr
Priority to BR112021011531-5A priority patent/BR112021011531B1/pt
Publication of WO2020121269A1 publication Critical patent/WO2020121269A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • 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
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • 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
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • B60K2015/03217—Fuel level sensors
    • 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
    • B60K2015/03427—Arrangements or special measures related to fuel tanks or fuel handling for heating fuel, e.g. to avoiding freezing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/302—Temperature sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/16—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F01N2610/1413—Inlet and filling arrangements therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1426—Filtration means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a tank having a filler pipe and to a method of manufacturing said tank.
  • the tank according to the invention is arranged to contain a fluid in liquid state, intended for a selective catalytic reduction (SCR) system of an exhaust system of an internal combustion engine. More particularly, the tank according to the invention is arranged to be installed on a vehicle equipped with an internal combustion engine having an exhaust system incorporating a selective catalytic reduction (SCR) system.
  • SCR selective catalytic reduction
  • SCR Selective Catalytic Reduction
  • SCR Selective Catalytic Reduction
  • a reaction is stoichiometric, i.e., if a sufficient amount of ammonia, proportionate to the amount of NO x produced by the internal combustion engine, is fed into a predetermined volume, or reaction chamber, all of NO x will be transformed into water and nitrogen.
  • SCR technology allows therefore cutting down NO x that are released into the atmosphere with the exhaust gases of an endothermic engine.
  • the SCR system is generally fed with a solution containing 32.5% in weight urea and 67.5% demineralised water.
  • a solution is commercially available under the name AdBlue®.
  • AdBlue® is fed to the reduction system incorporated in the exhaust system of an endothermic engine through a suction pump connected to an injection system.
  • a supply circuit is provided upstream of the pump and is connected to a tank in which the AdBlue® liquid is stored.
  • the AdBlue® liquid contained in the tank solidifies when temperature falls below -11.5°C.
  • the tank is equipped with a unit known as sender unit or drawing unit, arranged to heat the liquid contained in the tank by means of a heat exchanger and to allow drawing the liquid through a duct or suction pipe.
  • the heat exchanger includes a metal duct in which the coolant liquid of the endothermic engine, the exhaust gases of which are treated with the AdBlue® solution contained in the tank, circulates. Thanks to the heat exchanger, the temperature of the AdBlue® liquid contained in the tank is brought to and kept at a temperature higher than -11.5°C.
  • the sender unit further includes delivery and return pipes for the liquid contained in the tank, for delivering the liquid from the tank to the suction pump and for the return of the excess amount to the tank, respectively.
  • sender units are equipped with some additional components besides the components mentioned above. More particularly, sender units are known that are equipped with sensors for measuring parameters of the liquid contained in the tank, such as level, temperature and quality, the latter parameter being generally determined through a measurement of the urea concentration in the solution.
  • the prior art sender units are further equipped with net filters for a coarse filtering of the solution contained in the tank before the solution is sucked from the tank for being sent to the metering pump.
  • the sender units are also equipped with a printed circuit board for acquiring the signals coming from the sensors and with electrical connectors for connecting the unit to an electrical circuit, associated with an electronic control unit for controlling the operation of the SCR reduction system.
  • the current sender units integrate the functions of heating and drawing the liquid contained in the tank into a single apparatus.
  • the sender unit includes a portion internal to the tank, an external portion and a flange, located between the internal and external portions, for securing the unit to the tank wall in correspondence of a suitable hole.
  • the unit is thus inserted into the tank through an opening provided in the tank wall and is secured to the tank by means of screws engaging the flange.
  • This operating manner gives rise to a number of drawbacks and limitations. For instance, the shape and the development of the portion of the sender unit housed in the tank cannot be chosen at will, for instance in order to increase the unfreezing capability and rapidity, but they must be compatible with the entrance hole in order to allow installing the unit.
  • the sender units presently known are designed for being generally installed in the upper tank portion, typically at the top face of the tank.
  • Such a limitation entails the need to make sender units equipped with a suction pipe with a suitable length, in order to suck the liquid as the tank is being emptied. Said suction pipe undergoes vibrations while the vehicle is traveling and can therefore undergo breakages.
  • US 2011/0271754 and EP 3177814 A1 disclose examples of prior art sender units.
  • the current tanks designed for containing a urea solution are moreover equipped with a filler pipe having a closing cap.
  • the filler pipe allows filling a tank by means of the spout of a container of the urea solution or by means of the spout of a supply gun.
  • the urea solution is highly corrosive and it is necessary that the filler pipe has a passageway suitable for such a spout, preventing the loss of substance during filling up.
  • the filler pipe is moreover equipped with a filter.
  • the filter includes a cylindrical tube open at its bottom and laterally and equipped with a net.
  • the tube has a section suitable to receive the standard spout of a supply gun or of a container of the urea solution, and it is introduced through an annular flange secured to the tank at a hole provided for that aim.
  • the tube is secured to the flange by means of a coupling system allowing removing the filter for cleaning it.
  • the filtering surface is therefore determined by the diameter of the cylindrical tube.
  • the filtering surface of the filler pipe of a tank for urea is of about 4070 mm 2 .
  • the tank according to the invention is equipped with a filler pipe and comprises a wall made of a plastic material internally defining a tank chamber.
  • the tank is further equipped with an assembly for heating and drawing the fluid contained in the tank.
  • said filler pipe comprises a body made of a plastic material in which an outer hollow portion and an inner hollow portion are defined.
  • the outer hollow portion has a cylindrical portion having a cross- sectional size larger than the cross-sectional size of the inner portion and provided with at least one side opening housing a filtering net.
  • the outer portion of the filler pipe comprises opposite bases both of which are preferably open, and has a substantially cylindrically shape with circular cross-section.
  • Said outer portion of the filler pipe further comprises in succession a laterally closed portion and a laterally open portion that are axially aligned, and said laterally open portion and the open base of said laterally open portion are moreover provided with a filtering net.
  • the laterally open portion is defined by a set of axial extensions extending along corresponding generatrices, said extensions starting from the laterally closed portion and ending at an annular portion surrounding said open base of the outer portion of the filler pipe.
  • the filler pipe further includes an inner hollow portion including a cylindrical body with circular cross-section preferably housed in removable manner in the outer hollow portion. Said inner portion, when housed in the outer portion of the filler pipe, extends over the whole length of the closed portion starting from the open base and over a section of the open portion preferably corresponding to at least about 1/4 of the length of said open portion.
  • the inner portion preferably includes an annular ring nut or ferrule having tabs axially extending outside said annular ferrule, and the inner portion can be engaged into or disengaged from the outer portion by manually rotating the inner portion by means of said tabs, thanks to a threaded or bayonet coupling between said inner and outer portions of the filler pipe according to the invention.
  • the tank is thus equipped with a filler pipe for introducing the liquid into the tank, the pipe being preferably provided with a net filter suitably dimensioned so as to enable increasing the surface through which the liquid passes while the tank is being filled.
  • the filter of the filler pipe can be made with porosity in the range 20 to 100 microns.
  • the filtering surface of the filler pipe will be at least about 9550 mm 2 , to allow an adequate filling rate notwithstanding the reduction in the porosity of the filtering surface.
  • the filler pipe has therefore a filtering surface preferably of at least 9550 mm 2 , that is a surface considerably wider than that of the filler pipes made in accordance with the present state of the art.
  • the tank is provided with a seat adapted to house a filler pipe for filling up the tank.
  • the seat is preferably formed in a cylindrical extension extending outside the tank in a direction substantially perpendicular to the upper face of the tank body.
  • Said seat further has a preferably circular opening, housing the filler pipe.
  • the tank equipped with a filler pipe has a wall made of a plastic material and defining therein a tank chamber, and an assembly for heating and drawing the fluid contained in the tank.
  • the method of manufacturing a tank comprises a step of obtaining a cylindrical extension in the tank wall during a tank moulding step, in order to house the filler pipe.
  • the tank further has an inlet for the return of the excess substance coming from the SCR system.
  • an inlet preferably consists of a thin tube co-moulded in the tank wall and provided with a connecting joint outside the tank for connection of a return pipe coming from the SCR system.
  • a thin tube is preferably made of plastics, e.g. the same plastic material as that of the tank, or of metal or another material.
  • said thin tube is located near the wall portion to which the first heating unit is secured and preferably on the top face of the tank.
  • FIG. 1 is a perspective view of a tank in accordance with a first embodiment of the invention
  • Fig. 2 is a cross-sectional view, taken along a first vertical plane, of the tank shown in Fig. 1;
  • Fig. 3 is an enlarged view of a detail of Fig. 2;
  • - Fig. 4 is a cross-sectional view, taken along a second vertical plane rotated by 90°, of the tank shown in Fig. 1;
  • Fig. 5 is an enlarged view of a detail of Fig. 4;
  • FIG. 6 is a cross-sectional view of the drawing unit of the tank shown in Fig. 1;
  • Fig. 7 is a plan view from below of the drawing unit shown in Fig. 6;
  • - Fig. 8 is a side view of the drawing unit shown in Fig. 6; - Fig. 9 is a cross-sectional view, taken along a vertical plane, of a tank in accordance with a second embodiment of the invention;
  • Fig. 10 is an enlarged view of a detail of Fig. 9;
  • FIG. 11 is a perspective view of the drawing unit of the tank shown in Fig. 9;
  • FIG. 12 is a perspective view from above of the drawing unit shown in Fig. 11;
  • FIG. 13 is an exploded perspective view of the drawing unit in accordance with the first embodiment of the invention.
  • Fig. 14 is a plan view from below of the drawing unit shown in Fig. 13;
  • - Fig. 15 is a side view of the heating unit equipped with a solenoid valve
  • FIG. 16 is a cross-sectional view, taken along a first vertical plane, of the tank equipped with a filler pipe according to a preferred embodiment of the invention
  • - Fig. 17 is a cross-sectional view, taken along a second vertical plane rotated by 90°, of the tank shown in Fig. 16;
  • FIG. 18 is a perspective view of the filler pipe shown in Fig. 16;
  • - Fig. 19 is a cross-sectional view, taken along a vertical plane, of the filler pipe shown in
  • FIG. 20 is an exploded view of the filler pipe shown in Fig. 16.
  • Tank 11 has a wall 13, made of a plastic material, internally defining a tank chamber 15.
  • the material wall 13 is made of is such as to allow tank 11 to contain a substance in liquid state comprising, for instance, a urea solution intended for a system for the selective catalytic reduction (SCR) of the exhaust gases of an endothermic engine.
  • SCR selective catalytic reduction
  • tank 11 has a seat 71 for housing a filler pipe for filling up tank 11.
  • Seat 71 can be obtained by forming a cylindrical extension 71a in tank wall 13 during the tank moulding step.
  • Cylindrical extension 71a extends outside tank 11 in a direction substantially perpendicular to top face 35 of the tank body.
  • Said extension 71a surrounds a preferably circular opening, housing the filler pipe.
  • a filler pipe 73 made according to a preferred embodiment of the invention.
  • an opening 75 is formed in a transverse wall or partition 75a of extension 71a.
  • Said transverse wall or partition 75a is formed inside extension 71a and lies in a plane substantially parallel to, but not coinciding with face 35 of the body of tank 11.
  • transverse partition 75a coincides with tank wall 13 and lies therefore in a plane coinciding with that of said wall 13.
  • extension 71a has a cylindrical shape with circular cross-section
  • internal seat 71 has a cylindrical shape with circular cross- section.
  • Opening 75 for the passage of filler pipe 73 is formed substantially centrally of transverse partition 75a.
  • Filler pipe 73 comprises a body of plastic material in which an outer hollow portion 77 and an inner hollow portion 79 are defined.
  • Outer portion 77 has a substantially cylindrical shape with circular cross-section and includes a laterally closed portion 77a and a laterally open portion 77b. Both bases 77c, 77d of outer portion 77 are open.
  • Open outer portion 77b defines a set of axial extensions 81, five in the illustrated example, which extend along as many generatrices starting from laterally closed portion 77a and end at an annular portion 77e of open base 77d.
  • Open portion 77b and the corresponding open base 77d house a filtering net 83a, 83b arranged to separate possibly present impurities from the substance flow introduced into filler pipe 73 for filling tank 11.
  • Closed portion 77a of outer hollow portion 77 can be secured, at open base 77c, into opening 75 provided in transverse wall 75a of seat 71 in tank 11.
  • Said closed portion 77a can be secured into opening 75 by known means, for instance a toothed joint, allowing removing outer portion 77 of filler pipe 73 from seat 71 for instance in order to clean filter 83a, 83b.
  • Filler pipe 73 further includes an inner hollow portion 79 comprising a cylindrical body with circular cross- section removably housed in outer hollow portion 77. Said inner portion 79, when housed in outer portion 77, extends over the whole length of closed portion 77a starting from open base 77c, and over a section of open portion 77b corresponding to about 1/4 of the length of said open portion 77b.
  • inner portion 79 includes an annular ferrule 85 having tabs 87 axially extending outside said annular ferrule 85.
  • Inner portion 79 can be made to engage outer portion 77 by manually rotating inner portion 79 by means of said tabs 87.
  • filler pipe 73 has a considerably wider filtering surface than the current filler pipes.
  • the filtering surface of filler pipe 73 is substantially given by the extension of filtering net 83a, 83b surrounding open cylindrical portion 77b and covering open base 77d of the body of outer portion 77.
  • inner portion 79 is equipped with an insert including a permanent magnet arranged to cooperate with the valve provided in the gun delivering the urea solution.
  • Aeration slots 89 are provided in opening 91 of inner portion 79 surrounded by ferrule 85, through which the spout of said delivery gun is introduced.
  • Closed portion 77a of outer portion 77 of filler pipe 73 can moreover be locked by means of a fast coupling into opening 75 provided in partition 75a.
  • Tank 11 has a wall 13, made of a plastic material, internally defining a tank chamber 15.
  • the material wall 13 is made of is such as to allow tank 11 to contain a substance in liquid state comprising, for instance, a urea solution intended for a system for the selective catalytic reduction (SCR) of the exhaust gases of an endothermic engine.
  • Tank 11 is equipped with at least one heating and suction or drawing assembly 17, arranged to heat the fluid contained in tank 11, in particular in order to avoid freezing thereof, and to draw the fluid from tank 11, in particular in order to send it to a suction or metering pump of a system for the selective catalytic reduction (SCR) of the exhaust gases.
  • SCR selective catalytic reduction
  • Heating and drawing assembly 17 includes a first unit 19, or heating unit, intended for heating the fluid in tank 11, and a second unit 21, or drawing unit, for drawing said fluid and sending it to the circuit of the SCR system.
  • Heating unit 19 includes a heating duct 23, provided with an inlet opening 25 and an outlet opening 27, for conveying a heating fluid.
  • Duct 23 extends, within tank 11, from inlet opening 25 towards outlet opening 27 preferably as an integral piece, i.e. preferably without connections or interruptions.
  • duct 23 of the first unit 19 comprises a rectilinear portion and a spiral section.
  • a delivery section 23a and a return section 23b are defined within said rectilinear portion, and said spiral section 23c establishes communication between sections 23a, 23b.
  • spiral section 23c and drawing unit 21 are configured so that said spiral section 23c substantially surrounds inlet opening 31 of said drawing unit 21, defined at the outer surface of filter 57.
  • Inlet and outlet openings 25, 27 of duct 23 are located outside tank 11 and can be connected, by known means, to a section of a cooling circuit of an endothermic engine.
  • Said endothermic engine preferably is the same engine whose exhaust gases are treated by the SCR system receiving the fluid contained in the tank.
  • heating and drawing units 19 and 21 are advantageously independent units, that is, they are mutually separated by a portion of the tank wall, so that, should said portion of the tank wall be removed, said units 19, 21 would be disjoined from each other.
  • heating unit 19 and drawing unit 21 can be associated with tank 11 at adjacent portions, or even at spaced apart portions, of wall 13 of tank 11.
  • said units 19, 21 are located at a distance from each other, that is, they are associated with wall 13 of tank 11 at respective portions 13a, 13b of said wall distant from each other, preferably on opposite parallel faces 35, 37 of tank 11.
  • units 19, 21 can be diametrically opposite, with the respective longitudinal axes substantially parallel and preferably coaxial, for instance when they are associated with respective parallel faces 35, 37 of a parallelepiped tank 11.
  • said units 19, 21 can be arranged with the respective longitudinal axes substantially perpendicular, for instance when they are associated with respective perpendicular faces 35, 39 of a parallelepiped tank 11.
  • unit 19 and unit 21 extend in a substantially rectilinear direction and are arranged substantially coaxial to each other.
  • Tank 11 shown in the Figures is oriented in its normal use configuration, i.e. with face 35 housing heating unit 19 located at the top and with face 37 housing drawing unit 21 located at the bottom.
  • heating unit 19 extends over substantially the whole depth of tank 11, i.e. substantially across the tank in vertical direction
  • drawing unit 21 extends over a portion sufficient to draw the liquid from the bottom of tank 11.
  • drawing unit 21 includes a drawing duct 29 having an inlet opening 31 and an outlet opening 33. Inlet and outlet openings 31, 33 of drawing duct 29 are located inside and outside tank 11, respectively.
  • Drawing unit 21 further includes a ferrule 41 provided with through -holes 43 for securing, for instance by means of screws, drawing unit 21 to wall 13 of tank 11 at a suitable hole provided therein.
  • ferrule 41 can be welded or glued to said wall 13 of tank 11.
  • Ferrule 41 is moreover associated with temperature sensors 45a, level sensors 45b and quality sensors 45c for the liquid contained in tank 11.
  • Said sensors 45a, 45b and 45c are associated with ferrule 41 on face 47 of said ferrule facing the inside of tank 11, so as to be exposed in chamber 15 enclosed by tank wall 13.
  • a seat 51 internally housing a printed circuit board electrically connected to said sensors 45a, 45b, 45c is provided on the opposite face 49 of ferrule 41.
  • the printed circuit board is also equipped with connectors for connecting the printed circuit board, through a cable 53, to an electrical circuit associated with an electronic control unit for controlling the functions of the SCR system through the signals coming from sensors 45a, 45b, 45c.
  • heating unit 19 and drawing unit 21 are located adjacent on the same face 35 of a substantially parallelepiped tank 11.
  • unit 19 and unit 21 extend in a substantially rectilinear direction and are arranged substantially coaxial to each other.
  • Tank 11 illustrated is oriented in its normal use configuration, i.e. with face 35 housing heating unit 19 and drawing unit 21 at portion 13a located at the top.
  • heating unit 19 preferably extends over substantially the whole depth of tank 11, i.e. substantially across the tank in vertical direction.
  • drawing unit 21 also preferably extends over the whole depth of tank 11, i.e. substantially across the tank in vertical direction, so as to allow sucking the liquid from tank 11, preferably until the liquid is almost completely exhausted.
  • drawing unit 21 includes a drawing duct 29 having an inlet opening 31, substantially consisting of the outer surface of filter 57, and an outlet opening 33.
  • Inlet and outlet openings 31, 33 of drawing duct 29 are located inside and outside tank 11, respectively.
  • drawing duct 29 extends across chamber 15 in vertical direction, so as to allow sucking the liquid from tank 11, preferably until the liquid is almost completely exhausted.
  • temperature sensors 45a, level sensors 45b and quality sensors 45c for the liquid contained in tank 11 are associated with a rod 55 extending over substantially the whole depth of tank 11 starting from ferrule 41.
  • ferrule 41 is made with circular shape and has a pair of diametrically opposite recesses 41, 41b for the passage of delivery section 23a and return section 23b of duct 23.
  • duct 23 of the first unit 19 comprises a rectilinear portion 23 a, 23b and a spiral section 23c.
  • a delivery section 23a and a return section 23b are defined in said rectilinear portion, and said spiral section 23c establishes communication between sections 23a, 23b.
  • spiral section 23c and drawing unit 21 are configured so that said spiral section 23c substantially surrounds inlet opening 31 of said drawing unit 21, substantially defined by the outer surface of filter 57.
  • unit 19 and unit 21 are associated with wall 13 in substantially coincident positions, while still being two separate independent units. Said units 19, 21 are therefore structurally connected only by wall 13 of tank 11.
  • duct 23 for heating the liquid contained in tank 11 is associated with wall 13 of tank 11 directly in the moulding step of the plastic material by means of the co-moulding technique.
  • a heat exchanger having the desired development and shape, by means of unit 19 inside tank 11, so as to occupy a volume sufficient to ensure the desired unfreezing.
  • duct 23 could have such a development that it extends within chamber 15 either vertically, as shown for instance in Fig. 9, or also horizontally.
  • the wall of duct 23 of unit 21 can be smooth or embossed, and can be made of steel or of a suitable plastic material, even identical to the material of walls 13.
  • duct 23, extending within chamber 15 with its delivery and return sections 23 a, 23b and its spiral connecting section 23c, can be free or can be secured by means of clips or hangers or brackets located in chamber 15 of the tank and arranged to prevent possible displacements and/or breakages due to vibrations and oscillations during use, e.g. while a vehicle on which the tank is installed is traveling.
  • a pipe made of stainless steel or another material is introduced into and secured inside the same tank and is then connected to the cooling system of the internal combustion engine in order to act as a heat exchanger.
  • a single flange 41 carries both temperature, level and quality sensors 45a, 45b, 45c for monitoring the parameters of the liquid contained in the tank, and the electronic apparatus consisting of the printed circuit board housed in seat 51 and transmitting the signals coming from said sensors 45a, 45b, 45c to the electrical circuit of the vehicle through an integrated electrical connection.
  • said flange 41 preferably also carries an integrated filter for purifying the operative liquid contained in tank 11 from impurities, and a threaded connection at opening 33 for the outlet of the filtered liquid.
  • tank 11 further has an inlet 28 for the return of the excess substance coming from the SCR system.
  • an inlet 28 preferably consists of a thin tube 28a co-moulded in tank wall 13 and provided with a connecting joint 28b located outside tank 11 for connection of a return pipe coming from the SCR system.
  • a thin tube 28a is preferably made of plastics, e.g. the same plastic material as that of the tank, or of metal or another material.
  • said thin tube 28a is located near wall portion 13a to which the first heating unit 19 is secured, and preferably on top face 35 of tank 11.
  • tank 11 is moreover provided with a vent opening 30, preferably formed on said top face 35 of tank 11 and intended to allow gas discharge towards the atmosphere, in order to avoid pressure increase within the tank.
  • Said opening 30 can be advantageously equipped with a filter for preventing entry of impurities.
  • drawing unit 21 includes a filter 57, preferably with substantially cylindrical shape, having a filtering material 57a that is preferably pleated in order to increase the filtering surface.
  • Filtering material 57a has a substantially toroidal shape, has a closed bottom 57b and defines a corresponding and preferably interchangeable cartridge, as it can be better appreciated from Fig. 13.
  • flange 41 is thus provided with a hole 59 for housing a cylindrical cartridge of filtering material 57a.
  • the cylindrical cartridge of filtering material 57a can advantageously be screwed or secured in another way into said hole 59.
  • filter 57 will be a "for-life" filter, i.e. it does not need to be replaced during the whole life of the vehicle.
  • Filtering material 57a can consist for instance of a pleated net or of another suitable material.
  • the filtering degree of filtering material 57a will preferably range from 1 to 100 microns, in order to meet the different use requirements.
  • solenoid valve 61 is located outside tank 11, in contact with wall 13 of tank 11. In the specific case of the illustrated embodiment, solenoid valve 61 is secured against portion 13a of said wall 13. Said solenoid valve 61 is arranged to intercept the flow of the heating fluid circulating in duct 23 in order to adjust the flow rate thereof.
  • said fluid is the fluid of the cooling circuit of the endothermic engine the exhaust system of which is equipped with an SCR system to which the fluid contained in tank 11 is sent.
  • Solenoid valve 61 is provided with a connector 63 for connecting solenoid valve 61 to an electrical circuit associated with an electronic control unit.
  • the tank according to the invention has advantageous industrial application, since it is arranged to be installed aboard vehicles actuated by endothermic engines, in order to contain a fluid in liquid state, intended for a system for the selective catalytic reduction (SCR) of the exhaust system of the endothermic engine.
  • SCR selective catalytic reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un réservoir (11) ayant un tuyau de remplissage (73), comprenant une paroi (13) réalisée en une matière plastique et définissant à l'intérieur de celle-ci une chambre de réservoir (15), et un ensemble (17) pour chauffer et aspirer le fluide contenu dans le réservoir, ledit tuyau de remplissage (73) comprenant un corps réalisé en une matière plastique dans lequel une partie creuse externe (77) et une partie creuse interne (79) sont définies, et la partie creuse externe (77) comprenant une partie cylindrique (77b) ayant une taille de section transversale supérieure à la taille de section transversale de la partie interne (79) et comportant au moins une ouverture latérale recevant un filet de filtration (83a).
PCT/IB2019/060757 2018-12-14 2019-12-13 Réservoir ayant un tuyau de remplissage et procédé pour sa fabrication Ceased WO2020121269A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19835738.6A EP3894678A1 (fr) 2018-12-14 2019-12-13 Réservoir ayant un tuyau de remplissage et procédé pour sa fabrication
BR112021011531-5A BR112021011531B1 (pt) 2018-12-14 2019-12-13 Tanque possuindo um tubo de enchimento e método para a fabricação do mesmo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000011135A IT201800011135A1 (it) 2018-12-14 2018-12-14 Serbatoio dotato di bocchettone di riempimento e metodo per la fabbricazione di detto serbatoio
IT102018000011135 2018-12-14

Publications (1)

Publication Number Publication Date
WO2020121269A1 true WO2020121269A1 (fr) 2020-06-18

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Application Number Title Priority Date Filing Date
PCT/IB2019/060757 Ceased WO2020121269A1 (fr) 2018-12-14 2019-12-13 Réservoir ayant un tuyau de remplissage et procédé pour sa fabrication

Country Status (3)

Country Link
EP (1) EP3894678A1 (fr)
IT (1) IT201800011135A1 (fr)
WO (1) WO2020121269A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100200115A1 (en) * 2009-02-09 2010-08-12 Rototech S.R.I. Guide, fill-enabling and filtering device for a tank, in particular for a tank of urea solution for a motor vehicle fitted with a diesel engine
DE202010001147U1 (de) * 2009-12-22 2011-05-12 Reutter Gmbh Einfüllstutzen für einen Flüssigkeitstank, insbesondere Harnstofftank an Kraftfahrzeugen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110271754A1 (en) 2010-05-04 2011-11-10 Rochester Gauges, Inc. Liquid Level Transducer with Heating Unit
DE202011100846U1 (de) * 2011-05-16 2012-08-17 Reutter Gmbh Einfüllstutzen für einen Harnstoffbehälter und einen damit versehenen Harnstoffbehälter
US10358962B2 (en) 2014-08-04 2019-07-23 Officine Metallurgiche G. Cornaglia, S.P.A. Unit for feeding a reducing solution from the tank to the exhaust duct of an engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100200115A1 (en) * 2009-02-09 2010-08-12 Rototech S.R.I. Guide, fill-enabling and filtering device for a tank, in particular for a tank of urea solution for a motor vehicle fitted with a diesel engine
DE202010001147U1 (de) * 2009-12-22 2011-05-12 Reutter Gmbh Einfüllstutzen für einen Flüssigkeitstank, insbesondere Harnstofftank an Kraftfahrzeugen

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BR112021011531A2 (pt) 2021-08-31
IT201800011135A1 (it) 2020-06-14
EP3894678A1 (fr) 2021-10-20

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