EP2650539A1 - Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck - Google Patents

Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck Download PDF

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Publication number
EP2650539A1
EP2650539A1 EP12305423.1A EP12305423A EP2650539A1 EP 2650539 A1 EP2650539 A1 EP 2650539A1 EP 12305423 A EP12305423 A EP 12305423A EP 2650539 A1 EP2650539 A1 EP 2650539A1
Authority
EP
European Patent Office
Prior art keywords
piston
pump according
valve
casing
pumping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12305423.1A
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English (en)
French (fr)
Inventor
Jean-Sébastien Fromont
Stéphane Renaut
Romain Bouvet
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.)
TI Automotive Fuel Systems SAS
Original Assignee
TI Automotive Fuel Systems SAS
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 TI Automotive Fuel Systems SAS filed Critical TI Automotive Fuel Systems SAS
Priority to EP12305423.1A priority Critical patent/EP2650539A1/de
Publication of EP2650539A1 publication Critical patent/EP2650539A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids

Definitions

  • the invention relates to the field of fluid pumps, and more particularly to the field of solenoid piston pumps.
  • the invention relates specifically to the field of pumping an additive for a waste gas cleaning catalyst of a vehicle internal combustion engine.
  • Solenoid piston pumps generally comprise a casing which houses a piston actuated in reciprocate displacement thanks to a coil so as to successively suck fluid from a tank and expel such fluid to an output.
  • New legislations which target the reduction of pollutant emissions from motor vehicles lead to systems for eliminating nitrogen oxides NO x from exhaust gases of vehicles.
  • SCR Selective Catalytic Reduction
  • the vehicles are therefore provided with an additive tank and means for pumping an injecting the precursor when needed.
  • aqueous urea solution generally used for this purposes made by a water/urea eutectic containing 32,5 wt% of urea, is very corrosive.
  • aqueous urea solution used in SCR freezes at -11°C.
  • the pressure regulation for the injector setting point is achieved thanks to either the use of a passive pressure regulator or a pressure sensor associated with dedicated algorithm in embedded electronic device. This leads to complex and expensive architectures with lower power efficiency.
  • the present invention aims to solve the above problems by providing a simple fluid pump than that proposed according to the state of the art and with better liability than the known pumps.
  • the present invention relates to a pump comprising a casing which houses a piston actuated in reciprocate displacement thanks to a coil so as to successively suck liquid from a tank and expel such liquid to an output, in a pumping mode, characterized in that said casing further includes on said output a valve actuated by an auxiliary coil so as to selectively reverse the way of fluid circulation into the casing.
  • the pump comprises a spring which urges said piston towards a rest position corresponding to an expelling position so that the delivery pressure of the liquid corresponds to the force exerted by the spring.
  • the pump 10 in accordance with the present invention which is illustrated in the enclosed figures comprises :
  • the above elements are centered on a longitudinal axis O-O.
  • the valve module 300 includes a valve core 310 which bears two check valves 320 and 330.
  • the state of the two check valves 320, 330, respectively opened and closed, is inverted depending of the position of the valve core 310 under the control of the auxiliary coil 350.
  • the valve core 310 is biased towards a rest position by a spring 312.
  • the valve core 310 is translated along O-O axis when auxiliary coil 350 is supplied.
  • the input of the pump is referenced 12.
  • the output of the pump is referenced 14.
  • Said input 12 and said output 14 are both provided with an external O-ring 13, 15 for establishing sealing in the system receiving the pump.
  • the casing 100 defines a pumping chamber 110 in which a part 212 of the piston 210 displaces along O-O axis under control of the coil 250.
  • Said pumping chamber 110 is defined in a central piece 116 which operates guiding of the piston 210 in its displacement in translation along the longitudinal axis O-O of the pump.
  • Circulation of liquid between input 12 and the pumping chamber 110 is defined by a pumping channel 211 on the periphery of the piston 210, said pumping channel leading to the pumping chamber 110 by way of a transverse bore 112 provided in the guiding piece 116.
  • Piston 210 is urged by a spring 260 towards a rest position illustrated on figure 2 wherein said part 212 of the piston is mainly inside the pumping chamber and covers the bore 112.
  • the force of the spring 260 urges the piston 210 towards the rest position, covering the bore 112 and expelling the liquid from the pumping chamber 110 toward the output 14, via the checking valve 320 which is forced in open position. Delivery of liquid is made through a delivery channel 311 provided inside the valve core 310 and leading to the output 14.
  • the first check valve 320 comprises a shutter 322 biases towards a valve seat 324 along O-O axis by a spring 326.
  • Check valve 320 is on the side of the valve module 300 adjacent the pumping chamber.
  • Valve seat 324 corresponds to the axial end of the pumping chamber 110 opposite the input 112 and facing the valve module 300.
  • the second check valve 330 comprises a shutter 332 biases towards a valve seat 334 along O-O axis by a spring 336.
  • Check valve 330 is on the side of the valve module 300 adjacent the output 14. In its closed position the second check valve 330 closes the output 14.
  • Both springs 326 and 336 rest on the valve core 310.
  • first check valve 320 is closed while the second check valve 330 is open.
  • the pump comprises an auxiliary passage 150 between the pumping channel 211 of the pumping module 200 and the delivery channel 311 of the valve module 300, said auxiliary passage 150 being controlled by an auxiliary valve 151 comprising a ball shutter 152 biases towards a seat 154 by a spring 156 so that auxiliary passage 150 opens when a high pressure is applied in the delivery channel 311.
  • the auxiliary coil 350 is supplied so that the first valve 320 is open while the second valve 330 is closed as illustrated in figure 4 .
  • the force of the spring 260 urges the piston 210 towards the rest position, expelling the fluid from the pumping chamber 110 toward the input 12, via the checking valve 320 which is in open position, the auxiliary passage 150 and the pumping channel 211.
  • the spring 260 is designed to work in a small displacement range, such as a fixed system pressure is achieved.
  • the spring 260 bears on a calibrating support 262 which can be displaced initially during assembly process on a part of the casing, for example in a central bore 11 of the input 12, so as to adjust precisely the delivery pressure.
  • O-rings 316 and 318 are facing respectively on each axial end of the valve core 310 so as to damper shocks of the valve core 310.
  • Said O-rings 316 and 318 bear respectively one on the central guiding piece 116 and the other on the setback of the output 14.
  • the casing 100 comprises two cases 160 and 170 which receives respectively one the main coil 250 and the other the auxiliary coil 350.
  • the two cases 160 and 170 are mechanically linked by an intermediate sheath 180.
  • the intermediate sheath supports internally the guiding piece 116.
  • Input 12 is fitted in a central chamber of the case 160 while output 14 is fitted in a central chamber of the case 170.
  • the pump in accordance with the present invention allows precise dosing at high pressure with a precise adjustment of the pressure.
  • the invention offers numerous advantages in regard of the state of the art.
  • the big advantage of the present invention is to propose in the same pump packaging, the integration of two functions which are pressure regulation and reverse mode. This will create a really compact pumping system by saving space and components.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP12305423.1A 2012-04-11 2012-04-11 Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck Withdrawn EP2650539A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12305423.1A EP2650539A1 (de) 2012-04-11 2012-04-11 Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12305423.1A EP2650539A1 (de) 2012-04-11 2012-04-11 Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck

Publications (1)

Publication Number Publication Date
EP2650539A1 true EP2650539A1 (de) 2013-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12305423.1A Withdrawn EP2650539A1 (de) 2012-04-11 2012-04-11 Elektromagnetische Kolbenpumpe zur Injektion eines Additivs mit integriertem Umkehrflussmodus und der Fähigkeit zur Erzeugung und Regulierung von hohem Druck

Country Status (1)

Country Link
EP (1) EP2650539A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3848578A1 (de) * 2020-01-08 2021-07-14 Bilfinger EMS GmbH Pumpe und odoriersystem mit einer solchen pumpe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5833211A (en) * 1995-02-10 1998-11-10 Berling; James T. Magnetically-powered valve
US20060013704A1 (en) * 2004-06-30 2006-01-19 Teruya Sawada Liquid aeration delivery apparatus
WO2009083179A1 (de) * 2008-01-02 2009-07-09 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Fluidikvorrichtung für kontrolliertes handhaben von flüssigkeiten und fluidiksystem mit einer fluidikvorrichtung
US20090191073A1 (en) * 2008-01-25 2009-07-30 General Electric Company Magnetic pumping machines
US20120063924A1 (en) * 2010-09-09 2012-03-15 Simmons Tom M Reciprocating fluid pumps including magnets, devices including magnets for use with reciprocating fluid pumps, and related methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5833211A (en) * 1995-02-10 1998-11-10 Berling; James T. Magnetically-powered valve
US20060013704A1 (en) * 2004-06-30 2006-01-19 Teruya Sawada Liquid aeration delivery apparatus
WO2009083179A1 (de) * 2008-01-02 2009-07-09 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Fluidikvorrichtung für kontrolliertes handhaben von flüssigkeiten und fluidiksystem mit einer fluidikvorrichtung
US20090191073A1 (en) * 2008-01-25 2009-07-30 General Electric Company Magnetic pumping machines
US20120063924A1 (en) * 2010-09-09 2012-03-15 Simmons Tom M Reciprocating fluid pumps including magnets, devices including magnets for use with reciprocating fluid pumps, and related methods

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3848578A1 (de) * 2020-01-08 2021-07-14 Bilfinger EMS GmbH Pumpe und odoriersystem mit einer solchen pumpe

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