US20110146249A1 - Device for injecting aqueous additives in a motor vehicle exhaust pipe - Google Patents
Device for injecting aqueous additives in a motor vehicle exhaust pipe Download PDFInfo
- Publication number
- US20110146249A1 US20110146249A1 US12/973,769 US97376910A US2011146249A1 US 20110146249 A1 US20110146249 A1 US 20110146249A1 US 97376910 A US97376910 A US 97376910A US 2011146249 A1 US2011146249 A1 US 2011146249A1
- Authority
- US
- United States
- Prior art keywords
- pump
- pressure regulator
- thermally conductive
- outlet
- contact
- 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.)
- Abandoned
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Classifications
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- 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]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D5/00—Pumps with circumferential or transverse flow
- F04D5/002—Regenerative pumps
-
- 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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/1433—Pumps
-
- 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
- This invention relates to the field of motor vehicle exhaust pipes.
- this invention relates to a device for nitrogen oxide treatment by catalytic reduction using aqueous additives, for example a urea solution, injected into or upstream of a catalyst.
- aqueous additives for example a urea solution
- FIG. 1 shows a device that includes:
- the devices of the type shown in FIG. 1 have already provided useful services.
- urea decomposes into ammonia and carbon gas.
- Ammonia reacts in turn with nitrogen oxides in order to form nitrogen and water.
- the known devices are often subject to malfunction at very low temperature, in particular when the urea solution injection devices are equipped with a pressure regulator.
- This invention is intended to improve the known devices so as to eliminate the malfunctions observed.
- a device for injecting an aqueous additive into an exhaust pipe of a motor vehicle including an additive tank and a pumping module for taking the additive and directing it toward the exhaust pipe, characterized in that the pumping module includes a rotary electric pump and includes a thermally conductive part in contact with the casing of the pump and the outlet of a pressure regulator so as to transfer heat to said outlet of the pressure regulator.
- the part in contact with the casing of the pump and the outlet of the pressure regulator in order to transfer heat to said outlet of the pressure regulator is a thermally conductive part.
- FIG. 1 described above diagrammatically shows a system according to the prior art designed for injecting a urea solution in a motor vehicle exhaust pipe
- FIG. 2 diagrammatically shows a module for injecting additives according to this invention
- FIG. 3 diagrammatically shows a module for injecting additives according to an alternative of this invention.
- FIG. 4 diagrammatically shows a module for injecting additives according to another alternative of this invention.
- FIG. 2 shows a module 100 according to this invention including a base 110 intended to be attached to the upper wall of an additive tank and which has a rotary electric pump 120 and a pressure regulator 150 .
- the rotary electric pump 120 and the pressure regulator 150 can be the subject of numerous alternative embodiments known to a person skilled in the art. Therefore, they will not be described in detail below.
- the rotary electric pump 120 is a pump comprised of two separate parts: an electrical control part 122 and a mechanical pumping part 130 .
- the electrical, control part 122 preferably includes an external wound stator 123 suitable for generating, when there is an adequate electric power supply, a rotating electric field making it possible to rotate a rotor associated with a shaft 125 .
- the electrical control part 122 and the mechanical pumping part 130 are preferably separated by a sealed partition 140 .
- an electric pump including two compartments, one for electrical control and the other for pumping mechanics, separated by a sealed partition 140 , makes it possible to prevent possible leakages of additives toward the electric winding.
- the transmission of the rotation movement between the rotor of the electrical control part 122 and an element opposite the mechanical pumping part 130 is achieved by means of permanent magnets or any equivalent means, one 126 secured to the shaft 125 on the side of the wall 140 located in the chamber housing the electrical control part 122 and the other 136 located opposite, on the other side of the sealed wall 140 , in the chamber housing the mechanical pumping part 130 .
- the mechanical pumping part 130 can be the subject of numerous embodiments. It is preferably a gear system of which the inlet shaft is rotatably mounted about an axis O-O aligned with the axis of the rotor 125 .
- the electrical pump 120 is preferably a brush-free pump.
- the regulator 150 preferably includes, as shown in FIG. 3 , a casing 152 divided into two chambers 153 , 155 by a membrane 156 .
- a first chamber 155 communicates with the outlet 131 of the mechanical pumping part 130 , by any suitable means, for example by means of a tubular line 142 .
- the second chamber 153 of the pressure regulator 150 houses a calibrated spring 152 that urges said membrane 156 against a valve 157 located in the first chamber 155 , of which the outlet communicates with a conduit 160 forming an additive return, which leads to the base of the tank receiving the module 100 .
- the module also includes a thermally conductive part 170 in contact with the casing of the pump, more specifically the casing portion surrounding the electrical control module 122 , and in contact with the outlet of the pressure regulator 150 .
- the part 170 thus makes it possible to transfer heat from the electrical control part 122 to the outlet of the pressure regulator 150 .
- the part 170 thus makes it possible to warm up and melt, if necessary, any mass of additives capable of obstructing the outlet of the pressure regulator at low temperature.
- the thermally conductive metal part 170 is preferably made of brass or stainless steel.
- timing means are preferably provided, which are suitable for supplying power, in an initial phase, and during a determined period, for example but not limited to approximately 20 minutes, to the electrical control module 122 in a state so that it does not generate a rotating field capable of causing the mechanical pumping part 130 to rotate, but acts as an electrically resistive winding capable of releasing heat by Joule effect, enabling the pressure regulator 150 to be warmed up by means of the metal part 170 .
- the timed device ensuring control of the electrical power supply of the engine when the vehicle is started so as to heat the winding without causing the pump to rotate is controlled by a measurement of the temperature of the urea solution, which performs this control only when the value is near the solidification temperature of the urea solution.
- the metal part 170 is a tubular part centered on the O-O axis of the pump 120 and in contact over a portion of the height thereof, at least at the level of the electrical control part 122 , with the casing of the pump 120 .
- the metal part 170 can he in contact with the casing of the pressure regulator 150 and/or the pump casing only over a portion of the height thereof.
- the metal tube 170 is cracked so as to ensure that the tube 170 is kept in contact with the pump body 120 and so as to enable compensation for the play due to thermal expansion.
- the thermally conductive part 170 is a multilobar tube so as to ensure good thermal contact with the casing of the motor portion of the pump while allowing free dilation and free deformation of said part 170 .
- thermally conductive metal part 170 in contact with the casing of the pump 120 also makes it possible, when necessary, to cool the electrical control part 122 .
- the lower portion of the tubular metal part 170 is also in contact with the casing portion surrounding the mechanical pumping part 130 at the level of an internal collar 172 .
- the thermally conductive metal part enabling the outlet of the pressure regulator 150 to be warmed up is formed by overmolding the plastic base 110 on said part 170 .
- FIG. 3 shows an alternative embodiment, according to which the outlet conduit 160 of the pressure regulator 150 is directly in contact with the casing of the pump 120 .
- FIG. 4 shows another alternative embodiment, in which the outlet conduit 160 of the pressure regulator 150 is formed by a plastic end piece 162 integral with the base 110 and which has a thermally conductive tubular insert 164 , for example made of metal.
- the end piece 162 has a low thickness so as not to act as a barrier to heat transfer. It is in contact with a metal part 170 that is itself in contact with the casing of the pump motor 122 .
- the insert 164 is also in contact with a vertical metal tube 166 that extends the end piece 162 and that is connected to the top portion 202 of a heater 200 associated with a suction filter 210 placed at the inlet of the pump 120 .
- This heater 200 and this filter 210 are the subject of another patent application filed in parallel by the applicant. Therefore, they will not be described in detail below.
- This invention makes it possible to solve the problems encountered in the prior art, including for modules in which he pressure regulator is not purged.
- This invention in particular is not limited to the use of urea solutions, but applies to the use of all aqueous additives making it possible, by catalytic reduction, to transform nitrogen oxides.
Abstract
This invention relates to a device for injecting aqueous additives into an exhaust pipe of a motor vehicle, including an additive tank and a pumping module for taking the additive and directing it toward the exhaust pipe, characterized in that the pumping module includes a rotary electric pump (120) and includes a thermally conductive part (170) in contact with the casing of the pump (120) and the outlet of a pressure regulator (150) so as to transfer heat to said outlet of the pressure regulator (150).
Description
- This invention relates to the field of motor vehicle exhaust pipes.
- More specifically, this invention relates to a device for nitrogen oxide treatment by catalytic reduction using aqueous additives, for example a urea solution, injected into or upstream of a catalyst.
- Such treatment devices, as shown in the appended
FIG. 1 , have already been proposed for many years. - This
FIG. 1 shows a device that includes: -
- an exhaust pipe 1 including a
catalyst 2, - a tank 3 for additive, for example a urea solution, and
- a
module 10 intended to take additive from the tank 3 in order to inject it into the exhaust pipe 1 by asupply line 11 and aninjector 12.
- an exhaust pipe 1 including a
- The devices of the type shown in
FIG. 1 have already provided useful services. - At high temperature, urea decomposes into ammonia and carbon gas.
- Ammonia reacts in turn with nitrogen oxides in order to form nitrogen and water.
- However, they do not always provide total satisfaction.
- In particular, the known devices are often subject to malfunction at very low temperature, in particular when the urea solution injection devices are equipped with a pressure regulator.
- This invention is intended to improve the known devices so as to eliminate the malfunctions observed.
- This objective is achieved by the invention, owing to a device for injecting an aqueous additive into an exhaust pipe of a motor vehicle, including an additive tank and a pumping module for taking the additive and directing it toward the exhaust pipe, characterized in that the pumping module includes a rotary electric pump and includes a thermally conductive part in contact with the casing of the pump and the outlet of a pressure regulator so as to transfer heat to said outlet of the pressure regulator.
- According to an advantageous feature of this invention, the part in contact with the casing of the pump and the outlet of the pressure regulator in order to transfer heat to said outlet of the pressure regulator is a thermally conductive part.
- A person skilled in the art will understand that the structure proposed in this invention makes it possible to warm up the outlet of the pressure regulator and thus eliminate malfunctions due to freezing of the aqueous additive at the outlet of the pressure regulator, which the applicant identified as one of the major sources of malfunctions.
- Other features, objectives and advantages of the present invention will appear in the following detailed description, and in view of the appended drawings, provided as non-limiting examples, in which:
-
FIG. 1 described above diagrammatically shows a system according to the prior art designed for injecting a urea solution in a motor vehicle exhaust pipe, -
FIG. 2 diagrammatically shows a module for injecting additives according to this invention, -
FIG. 3 diagrammatically shows a module for injecting additives according to an alternative of this invention, and -
FIG. 4 diagrammatically shows a module for injecting additives according to another alternative of this invention. - The appended
FIG. 2 shows amodule 100 according to this invention including abase 110 intended to be attached to the upper wall of an additive tank and which has a rotaryelectric pump 120 and apressure regulator 150. - The rotary
electric pump 120 and thepressure regulator 150 can be the subject of numerous alternative embodiments known to a person skilled in the art. Therefore, they will not be described in detail below. - Preferably, however, in this invention, the rotary
electric pump 120 is a pump comprised of two separate parts: anelectrical control part 122 and amechanical pumping part 130. The electrical,control part 122 preferably includes anexternal wound stator 123 suitable for generating, when there is an adequate electric power supply, a rotating electric field making it possible to rotate a rotor associated with ashaft 125. - The
electrical control part 122 and themechanical pumping part 130 are preferably separated by a sealedpartition 140. - The use of an electric pump including two compartments, one for electrical control and the other for pumping mechanics, separated by a sealed
partition 140, makes it possible to prevent possible leakages of additives toward the electric winding. - The transmission of the rotation movement between the rotor of the
electrical control part 122 and an element opposite themechanical pumping part 130 is achieved by means of permanent magnets or any equivalent means, one 126 secured to theshaft 125 on the side of thewall 140 located in the chamber housing theelectrical control part 122 and the other 136 located opposite, on the other side of thesealed wall 140, in the chamber housing themechanical pumping part 130. - The
mechanical pumping part 130 can be the subject of numerous embodiments. It is preferably a gear system of which the inlet shaft is rotatably mounted about an axis O-O aligned with the axis of therotor 125. - The
electrical pump 120 is preferably a brush-free pump. - The
regulator 150 preferably includes, as shown inFIG. 3 , acasing 152 divided into twochambers membrane 156. - A
first chamber 155 communicates with theoutlet 131 of themechanical pumping part 130, by any suitable means, for example by means of atubular line 142. - The
second chamber 153 of thepressure regulator 150 houses acalibrated spring 152 that urges saidmembrane 156 against avalve 157 located in thefirst chamber 155, of which the outlet communicates with aconduit 160 forming an additive return, which leads to the base of the tank receiving themodule 100. - Insofar as the pressure delivered by the outlet of the
pump 120 is lower than the force applied to themembrane 156 by thecalibrated spring 154, themembrane 156 is applied against thevalve 157 and no additive is delivered by theoutlet conduit 160. - Instead, when the outlet pressure of the
mechanical pumping part 130 exceeds the calibration force of thespring 154, themembrane 156 is detached from thevalve 157. Consequently, the excess pressure of additives delivered by thepump 100 is sent to the additive tank by means of theconduit 160. - As indicated above, according to an essential feature of the invention, the module also includes a thermally
conductive part 170 in contact with the casing of the pump, more specifically the casing portion surrounding theelectrical control module 122, and in contact with the outlet of thepressure regulator 150. Thepart 170 thus makes it possible to transfer heat from theelectrical control part 122 to the outlet of thepressure regulator 150. - The
part 170 thus makes it possible to warm up and melt, if necessary, any mass of additives capable of obstructing the outlet of the pressure regulator at low temperature. - The thermally
conductive metal part 170 is preferably made of brass or stainless steel. - According to another advantageous feature of this inventive, timing means are preferably provided, which are suitable for supplying power, in an initial phase, and during a determined period, for example but not limited to approximately 20 minutes, to the
electrical control module 122 in a state so that it does not generate a rotating field capable of causing themechanical pumping part 130 to rotate, but acts as an electrically resistive winding capable of releasing heat by Joule effect, enabling thepressure regulator 150 to be warmed up by means of themetal part 170. - The timed device ensuring control of the electrical power supply of the engine when the vehicle is started so as to heat the winding without causing the pump to rotate is controlled by a measurement of the temperature of the urea solution, which performs this control only when the value is near the solidification temperature of the urea solution.
- Also more specifically, according to the specific non-limiting embodiment shown in
FIG. 2 , themetal part 170 is a tubular part centered on the O-O axis of thepump 120 and in contact over a portion of the height thereof, at least at the level of theelectrical control part 122, with the casing of thepump 120. - It will be noted in the examination of the appended
FIG. 2 that themetal part 170 can he in contact with the casing of thepressure regulator 150 and/or the pump casing only over a portion of the height thereof. - Indeed, there is a
space 171 between thetube 170 and the casing of the pressure regulator in order to allow free thermal expansion. - Alternatively, the
metal tube 170 is cracked so as to ensure that thetube 170 is kept in contact with thepump body 120 and so as to enable compensation for the play due to thermal expansion. - According to yet another alternative embodiment of this invention, the thermally
conductive part 170 is a multilobar tube so as to ensure good thermal contact with the casing of the motor portion of the pump while allowing free dilation and free deformation of saidpart 170. - The use of such a thermally
conductive metal part 170 in contact with the casing of thepump 120 also makes it possible, when necessary, to cool theelectrical control part 122. - It will be noted in this regard that the lower portion of the
tubular metal part 170 is also in contact with the casing portion surrounding themechanical pumping part 130 at the level of aninternal collar 172. - According to a specific non-limiting embodiment of this invention, the thermally conductive metal part enabling the outlet of the
pressure regulator 150 to be warmed up is formed by overmolding theplastic base 110 on saidpart 170. - Such an embodiment makes it possible to produce the entire module at low cost.
-
FIG. 3 shows an alternative embodiment, according to which the outlet conduit 160 of thepressure regulator 150 is directly in contact with the casing of thepump 120. -
FIG. 4 shows another alternative embodiment, in which the outlet conduit 160 of thepressure regulator 150 is formed by aplastic end piece 162 integral with thebase 110 and which has a thermally conductive tubular insert 164, for example made of metal. Theend piece 162 has a low thickness so as not to act as a barrier to heat transfer. It is in contact with ametal part 170 that is itself in contact with the casing of thepump motor 122. - Preferably, as shown in
FIG. 4 , the insert 164 is also in contact with avertical metal tube 166 that extends theend piece 162 and that is connected to thetop portion 202 of aheater 200 associated with asuction filter 210 placed at the inlet of thepump 120. - This
heater 200 and thisfilter 210 are the subject of another patent application filed in parallel by the applicant. Therefore, they will not be described in detail below. - A person skilled in the art will understand that the
tube 166 connected to theheater 200 makes it possible to reinforce the warming up of the outlet of thepressure regulator 150 when necessary. - This invention makes it possible to solve the problems encountered in the prior art, including for modules in which he pressure regulator is not purged.
- Of course, this invention is not limited to the specific embodiment described above, but includes any alternative consistent with the invention.
- This invention in particular is not limited to the use of urea solutions, but applies to the use of all aqueous additives making it possible, by catalytic reduction, to transform nitrogen oxides.
Claims (15)
1. Device for injecting aqueous additives into an exhaust pipe of a motor vehicle, including an additive tank and a pumping module for taking the additive and directing it toward the exhaust pipe, characterized in that the pumping module includes a rotary electric pump (120) and includes a thermally conductive part (170) in contact with a casing of the pump (120) and an outlet of a pressure regulator (150) so as to transfer heat to said outlet of the pressure regulator (150).
2. Device according to claim 1 , characterized in that the part (170) in contact with the casing of the pump (120) and the outlet of the pressure regulator (150) in order to transfer heat to said outlet of the pressure regulator (150) is a thermally conductive part.
3. Device according to claim 2 , characterized in that the thermally conductive part (170) is in contact with a pump casing portion (120) surrounding an electrical control part (122).
4. Device according to claim 2 , characterized in that the thermally conductive part (170) is a longitudinally cracked tube.
5. Device according to claim 2 , characterized in that the thermally conductive part (170) is a multilobar tube.
6. Device according to claim 1 , characterized in that the outlet conduit (160) of the pressure regulator (150) is formed by a plastic end piece (162) in contact with the part (170) ensuring the transfer of heat from the pump casing (120).
7. Device according to claim 6 , characterized in that the outlet conduit (160) of the pressure regulator (150) is integral, with a base (110).
8. Device according to claim 6 , characterized in that the outlet conduit (160) of the pressure regulator (150) has a thermally conductive tubular insert (164).
9. Device according to claim 1 , characterized in that the outlet conduit (160) of the pressure regulator (150) is in contact with a vertical metal tube (166) that is connected to a top portion (202) of a heater (200) associated with a suction filter (210) placed at an inlet of the pump (120).
10. Device according to claim 1 , characterized in that the additive is a urea solution.
11. Device according to claim 1 , characterized in that the pump is a two-part pump including an electrical control part and a mechanical pumping part, which are magnetically coupled.
12. Device according to claim 1 , characterized in that the pump (120) includes an electrical control part (122) with an external stator capable of generating a rotary field.
13. Device according to claim 1 , characterized in that the thermally conductive part (170) is made of brass.
14. Device according to claim 1 , characterized in that the thermally conductive part is in contact with a mechanical pumping part of the pump (130).
15. Device according to claim 1 , characterized in that it includes timed means suitable for ensuring control of the electrical power supply of the engine when the vehicle is started so as to heat a winding of the motor (120) without rotating the pump when a measured temperature of the additive indicates a value close to the solidification temperature.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0959390A FR2954403B1 (en) | 2009-12-22 | 2009-12-22 | DEVICE FOR INJECTING AQUEOUS ADDITIVES IN AN EXHAUST LINE OF A MOTOR VEHICLE |
FR0959390 | 2009-12-22 |
Publications (1)
Publication Number | Publication Date |
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US20110146249A1 true US20110146249A1 (en) | 2011-06-23 |
Family
ID=42474380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/973,769 Abandoned US20110146249A1 (en) | 2009-12-22 | 2010-12-20 | Device for injecting aqueous additives in a motor vehicle exhaust pipe |
Country Status (2)
Country | Link |
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US (1) | US20110146249A1 (en) |
FR (1) | FR2954403B1 (en) |
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US8822887B2 (en) | 2010-10-27 | 2014-09-02 | Shaw Arrow Development, LLC | Multi-mode heater for a diesel emission fluid tank |
USD729141S1 (en) | 2014-05-28 | 2015-05-12 | Shaw Development LLC | Diesel emissions fluid tank |
USD729722S1 (en) | 2014-05-28 | 2015-05-19 | Shaw Development LLC | Diesel emissions fluid tank floor |
WO2016074631A1 (en) * | 2014-11-14 | 2016-05-19 | 天纳克(苏州)排放***有限公司 | Fluid delivery device |
DE102017207829A1 (en) * | 2017-05-09 | 2018-11-15 | Robert Bosch Gmbh | Pump arrangement of a water injection device and water injection device of an internal combustion engine |
US10180096B2 (en) | 2014-06-11 | 2019-01-15 | Tenneco Automotive Operating Company Inc. | Fluid delivery system with line pressure control valve |
US10202883B2 (en) | 2014-11-21 | 2019-02-12 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail assembly, urea injection system and application thereof |
US10634034B2 (en) | 2014-11-21 | 2020-04-28 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail, application of the common rail, carbamide spraying system, and control method therefor |
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2010
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8822887B2 (en) | 2010-10-27 | 2014-09-02 | Shaw Arrow Development, LLC | Multi-mode heater for a diesel emission fluid tank |
USD729141S1 (en) | 2014-05-28 | 2015-05-12 | Shaw Development LLC | Diesel emissions fluid tank |
USD729722S1 (en) | 2014-05-28 | 2015-05-19 | Shaw Development LLC | Diesel emissions fluid tank floor |
US10180096B2 (en) | 2014-06-11 | 2019-01-15 | Tenneco Automotive Operating Company Inc. | Fluid delivery system with line pressure control valve |
WO2016074631A1 (en) * | 2014-11-14 | 2016-05-19 | 天纳克(苏州)排放***有限公司 | Fluid delivery device |
US10344653B2 (en) | 2014-11-14 | 2019-07-09 | Tenneco (Suzhou) Emission System Co., Ltd. | Fluid delivery device |
US10202883B2 (en) | 2014-11-21 | 2019-02-12 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail assembly, urea injection system and application thereof |
US10634034B2 (en) | 2014-11-21 | 2020-04-28 | Tenneco (Suzhou) Emission System Co., Ltd. | Common rail, application of the common rail, carbamide spraying system, and control method therefor |
DE102017207829A1 (en) * | 2017-05-09 | 2018-11-15 | Robert Bosch Gmbh | Pump arrangement of a water injection device and water injection device of an internal combustion engine |
CN108869104A (en) * | 2017-05-09 | 2018-11-23 | 罗伯特·博世有限公司 | The pump assembly of sprinkler and the sprinkler of internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
FR2954403B1 (en) | 2012-03-09 |
FR2954403A1 (en) | 2011-06-24 |
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Legal Events
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