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 ; Methods of operation or control of catalytic converters
  • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
• • 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 ; Methods of operation or control of catalytic converters
  • 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
  • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
  • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
  • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
  • B67D7/06—Details or accessories
  • B67D7/80—Arrangements of heating or cooling devices for liquids to be transferred
  • B67D7/82—Heating only
• • 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
• • 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
• • 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 fluid reservoir, and more particularly to a reservoir adapted for a fluid capable of freezing or whose viscosity varies very strongly depending on the temperature, the reservoir being equipped for this purpose with an integrated electric heating element, suitable for at least partially thaw the fluid contained in the reservoir.
• This invention is applicable, inter alia, to a reducing agent reservoir, in particular urea reducing agent, which can be used on a heat engine vehicle for the purposes of depollution. More particularly, the invention relates to such a tank which is provided with a heating reserve bowl, in which is drawn the fluid such as reducing agent, contained in the tank and taken for its use.
• motor vehicles must have additional depollution devices which are more and more complex, the depollution chemistry requiring either catalysts or oxidizing or reducing agents which are added, in particular in the exhaust line, to clean up.
• the dosage of urea must be adjusted to the needs created by the emissions of nitrogen oxides, generated by the engine.
• the urea is stored in a tank, put under pressure by a pump and distributed by an electromagnetic injector, the pump and the injector dosing the amount of urea taken from the tank and sent into the exhaust line, in connection with the operation of the engine so with the emissions of nitrogen oxides passing through the exhaust line.
• a first type of solution is to make a reducing agent reservoir provided with an integrated electric heating element, able to thaw at least partially the reducing agent.
• Another requirement to be taken into account is to keep the tapping system operating in tilt and slope conditions, even with an almost empty tank, without defusing the system.
• the present invention aims to provide a simple solution to the problems described above.
• the subject of the invention is a fluid reservoir, for example a reducing agent reservoir, in particular a urea-based agent, that can be used on a motor vehicle with a heat engine for the purposes of depollution, the tank being equipped with an integrated electric heating element, able to thaw at least partially the fluid such as reducing agent contained in the tank, this tank being characterized in that the heating element is placed inside a cavity delimited by a bowl, itself placed inside the tank, said cavity communicating with the internal volume of the reservoir by at least one valve, while a fluid suction pipe as a reducing agent dips into the cavity defined by the bowl, the starting point of the suction pipe being located near the heating element.
• a fluid reservoir for example a reducing agent reservoir, in particular a urea-based agent, that can be used on a motor vehicle with a heat engine for the purposes of depollution
• the tank being equipped with an integrated electric heating element, able to thaw at least partially the fluid such as reducing agent contained in the tank, this
• the electric heating element is placed at the bottom of the bowl.
• the valve is for example a diaphragm valve, this valve being, also, advantageously placed at the bottom of the bowl.
• This bowl is realizable in stainless steel, for reasons of compatibility with the reducing agents usually used.
• a tube immersed in the cavity defined by the bowl and conveying electrical conductors supplying the heating element in addition to the suction pipe of the reducing agent, there is also provided a tube immersed in the cavity defined by the bowl and conveying electrical conductors supplying the heating element.
• the fluid suction pipe as reducing agent, and the routing tube of the electric conductors supplying the heating element, are also advantageously made of stainless steel, for the same reasons as the bowl itself. .
• the invention proposes a simple solution, with the use of a fluid reserve bowl such as a reducing agent, which does not require an auxiliary pump while guaranteeing proper operation even under incline or slope conditions, and allowing also a low temperature operation through the heating element, judiciously disposed within the cavity del imitated by the bowl.
• a temperature sensor with servo function of the reheating and thermal protection, can be associated with the heating element, this temperature sensor thus also being located in the region of the bottom of the bowl.
• the combination of the bowl and the heating element has the advantage that the thawed fluid is confined to the priority area of use, where the fluid is sucked, so that only the strictly necessary amount of fluid is thawed, for an economic operation, fast and perfectly controllable.
• Figure 1 is a vertical sectional view of a reducing agent tank with a heating reserve bowl according to the present invention
• Figure 2 shows on an enlarged scale, in vertical section, the detail of the bowl with the heating element
• Figures 3 and 4 are views similar to Figure 2, illustrating the filling of the bowl and the operation of the valve
• Figures 5 and 6 are vertical sectional views of the tank, illustrating its operation in case of freezing of the reducing agent
• Figure 7 illustrates the operation of the tank and in particular of its bowl, in a tilt or slope condition.
• the reference 1 designates, as a whole, a reducing agent reservoir, which comprises a bottom wall 2, an upper wall 3 and a side wall 4, which delimit an internal volume 5 of this reservoir 1.
• the reservoir 1 contains, in use, a certain amount of reducing agent 6, the level of which is indicated in 7.
• the tank 1 is equipped with a heating element 10 of electric type, powered by electrical conductors January 1.
• the heating element 10 is provided to at least partially thaw the reducing agent 6 to allow its removal by a suction pipe 12, even at low temperatures.
• the suction pipe 12 is directed to a pump (not shown) by means of which the reducing agent 6 is drawn into the tank 1 and sent to an injector, which distributes this reducing agent in the exhaust line of the vehicle concerned. .
• the tank 1 is equipped with a bowl 13 placed in its internal volume 5.
• the bowl 13 has a bottom 14 and a side wall 1 5, which delimit a cavity 1 6, this bottom 14 of the bowl 1 3 being at a low height above the bottom wall 2 of the tank 1.
• the bowl 13 is held in the central region of the inner volume 5 of the tank 1 by fastening means, not shown.
• the heating element 10 is placed at the bottom 14 of the bowl 13, a temperature sensor 17 being associated with this heating element 1 0, with a double function of control of the heating and thermal protection.
• the suction pipe 12 of the reducing agent 6 dips into the cavity 16 of the bowl 13, the starting point 18 of this suction pipe 12 being situated close to the heating element 10.
• a tube 19 also plunges into the cavity 16 of the bowl 13, parallel to the suction pipe 12.
• the tube 19 serves for the routing of the electrical conductors 11 which supply the heating element 10.
• a valve 20 in particular made in the form of a diaphragm valve, suitable for creating or interrupting a communication between the cavity 1 6 of the bowl 1 3, from one side, and the inner volume 5 of the tank 1, on the other hand.
• the bowl 13 can be made of stainless steel for reasons of compatibility with this reducing agent.
• the suction pipe 12 and the routing of the electrical conductors can be made of stainless steel. Other materials compatible with the reducing agent, and ensuring a good heat transfer, are also conceivable here.
• FIGs 3 and 4 illustrate the operation in drawing of the reducing agent 6, when it is not frozen. If at a given instant the level 21 of the reducing agent in the cavity 16 of the bowl 13 is located lower than the level 7 of this reducing agent in the rest of the tank 1, the valve 20 is lifted under the effect of the hydrostatic pressure, and reducing agent 6 thus enters the cavity 16 of the bowl 13, as indicated by arrows F in Figure 3, until levels 21 and 7 are equalized between the inside and the outside of the bowl 13; the valve 20 then closes (see Figure 4).
• FIGS 5 and 6 illustrate the operation of the tank 1 in case of g el d e reducing agent 6, so low temperature. Initially, it is assumed that the reducing agent 6 is completely frozen.
• the heating element 1 0 is then fed by the electrical conductors 1 1 and thus causes a partial thaw of the reducing agent 6, inside the bowl 13 and also all around this bowl 13.
• the volume of thawed reducing agent is indicated at 22.
• the reducing agent When the reducing agent is to be drawn from the suction pipe 10, it is firstly the thawed reducing agent 22 inside the bowl 13 which is sucked up. The level of thawed reducing agent 22 is then gradually lowering in the bowl 13. Along the heating pipe 10 heated by thermal conduction creates a cylindrical layer 23 of thawed reducing agent, allowing the outside air to enter the bowl 13 and fill the cavity 24 resulting from the pumping of the reducing agent.
• FIG. 7 illustrates the operation when the vehicle thus the tank 1 is in a tilt or slope condition, and that the level 7 of the reducing agent 6 in the tank 1 is low, namely less than the height of the bowl. 13. With the valve 20, the reducing agent 6 is maintained in the bowl 13, which extends the operating time of the bailing system in such a condition.
• reservoirs of all shapes which may contain a reducing agent of any kind, or another fluid capable of freezing or whose viscosity varies very strongly depending on the temperature, for example a reservoir of washing liquid; motor vehicle ice cream.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Mechanical Engineering (AREA)
• Combustion & Propulsion (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• General Engineering & Computer Science (AREA)
• Transportation (AREA)
• Exhaust Gas After Treatment (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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• 2010
  • 2010-05-03 FR FR1053396A patent/FR2959497B1/fr active Active
  • 2010-09-08 US US13/696,126 patent/US20130129330A1/en not_active Abandoned
  • 2010-09-08 CN CN2010800032464A patent/CN103119258A/zh active Pending
  • 2010-09-08 WO PCT/FR2010/051867 patent/WO2011138514A2/fr active Application Filing
  • 2010-09-08 RU RU2012150457/06A patent/RU2012150457A/ru not_active Application Discontinuation
  • 2010-09-08 EP EP10851032A patent/EP2567079A2/fr not_active Withdrawn

Non-Patent Citations (1)

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