EP0907027B1 - Pompe à air entraínée par un moteur électrique - Google Patents

Pompe à air entraínée par un moteur électrique Download PDF

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Publication number
EP0907027B1
EP0907027B1 EP98109259A EP98109259A EP0907027B1 EP 0907027 B1 EP0907027 B1 EP 0907027B1 EP 98109259 A EP98109259 A EP 98109259A EP 98109259 A EP98109259 A EP 98109259A EP 0907027 B1 EP0907027 B1 EP 0907027B1
Authority
EP
European Patent Office
Prior art keywords
air pump
housing
pump according
cover
rotor
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.)
Expired - Lifetime
Application number
EP98109259A
Other languages
German (de)
English (en)
Other versions
EP0907027A1 (fr
Inventor
Rainer Peters
Günter van de Venne
Michael Bonse
Klaus Muckelmann
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0907027A1 publication Critical patent/EP0907027A1/fr
Application granted granted Critical
Publication of EP0907027B1 publication Critical patent/EP0907027B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/089—Layout of the fuel vapour installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D23/00—Other rotary non-positive-displacement pumps
    • F04D23/008—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to an electric air pump for a device for flushing a Activated carbon trap and, if necessary, for a temporary leak test on one connected to it Fuel tank system of a vehicle internal combustion engine.
  • Such a device is the subject of the unpublished patent application 197 09 903.3 (and DE-A-2 042 356), in which the purge air upstream of the throttle device Internal combustion engine introduced into the air intake system and by an electrical Air pump is conveyed, the direction of delivery in the leak test reversed becomes.
  • This air pump is a version based on control signals from a Circuit arrangement or a control program of an electronic control unit on and off, and if necessary must be switched according to the direction of rotation.
  • FIG. 1 shows a section of a device 1 for flushing an activated carbon trap 2 and for the temporary leak test of a fuel tank system 3 connected to it a vehicle internal combustion engine 4, in which the purge air from the atmosphere via the Activated carbon trap 2 in an air intake system 5 with a throttle device 6 Internal combustion engine 4 is initiated and the leak test by setting a Test pressure in the hermetically sealed tank system 3 and subsequent Pressure drop measurement, which is detected by a pressure sensor 7, over a period of time done, which provides information about the tightness.
  • the determination of tight or leaky tank system 3 can then be used as a diagnostic value in a control unit 12 are stored, acoustically or visually displayed. The latter is then done on a display.
  • FIG. 2 shows an electric air pump 8 according to the invention in a sectional view.
  • This electric air pump 8 consists of an electronically commutated electric motor 13, which is arranged together with the air pump in a housing 14, the one has first chamber 15, in which a stand package 16 is arranged, the electrical Connections 17 are guided through a plug cover 18 to the outside, the Plug cover 18 hermetically seals the chamber 15.
  • a second chamber 19 is provided, in which a bell-shaped on a pin 20 trained rotor 21 is arranged which has a cylindrical wall 22 of the area the first chamber 15, in which the stator assembly 16 is arranged, with the least Exceeds distance and one on the side facing away from the first chamber 15 Has collar 23, the several wing-shaped conveying members typical of peripheral pumps 24 which cooperate with an annular channel 25 which has a separating section 26 (Fig. 3) between two fluid connection piece 27, so that the fluid is sucked through the one nozzle 27 and pressed out of the other, depending reversed according to the direction of rotation.
  • the ring channel 25 is composed of an upper half of the housing 14 and a lower half a pump cover 28 is formed, the pin 20 on the one hand in a bore 29 of the housing 14 and on the other hand, a bore 30 of the pump cover 28 is held becomes.
  • the rotor 21 is fastened on the journal 20 by means of two bearings 31, 32. To increase the bearing distance, the rotor 21 has a hub extension 33, which protrudes into a corresponding bulge 34 of the pump cover 28.
  • the stand assembly 16 is held against rotation by ribs 35 which are arranged on the cylindrical wall 22 of the chamber 15 and engage in corresponding grooves 36 of the stand assembly 16. These ribs 35 serve on the other hand, to reinforce the relatively thin cylindrical wall 22.
  • This wall in conjunction with an end wall 37, borders the first chamber 15 opposite the second chamber 19.
  • the housing 14 has a pinch edge 39, which between the outer surface 40 of the rotor 21 or the magnetic ring 38 and a cylindrical End wall 41 of the second chamber 19 covers existing gap 42, so that splash losses are minimized.
  • the cylindrical wall 22 between the stator assembly 16 and the rotor 21 is very thin, so that there is a very narrow iron-free gap and thus low magnetic circuit losses, with which the number of windings and / or the current strength can be minimized.
  • An elastic seal 43 is inserted between the housing 14 and the pump cover 28 and elastic due to the connecting force between housing 14 and pump cover 28 deformed. Any connection type, e.g. B. a bayonet lock or welding can be provided.
  • Housing 14 and cover 18 and Pump cover 28 and rotor 21 can be made of plastic, advantageously polyphenylene sulfide, consist. To save the expensive high-quality polyphenylene sulfide the plug cover 18 can consist of a cheaper plastic.
  • Fig. 3 shows a side view of Fig. 2 with a detail from which the arrangement of the Ring channel 25, the separating section 26 and the wing-shaped conveying members 24 of the Rotor 21 and the two connecting pieces 27 can be seen.
  • Fig. 4 shows a complete stand package 16 with the individual sheets 46 and windings 47.
  • a central part 48 made of plastic is pressed into the stand package 16, into which a plurality of contact elements 49 are inserted, which have hooks 50 which are welded to winding ends 51. This results in cost-effective production.
  • a circuit board 52 is also placed on the middle part 48 and an electrical connection to the contact elements 49 is made by soldering.
  • the complete stand package 16 is held in the installed state by a plug cover attachment 53, which is supported on the printed circuit board 52 and loads it against contact surfaces 54 of the housing 14 (FIG. 2).
  • the air pump 8 can decouple structure-borne noise Have coupling ring 55 which is attached to the housing 14 and with a holder 56 is connected for mounting at an attachment point in the vehicle.
  • the coupling ring 55 through a shoulder 57 of the connector cover 18 is loaded so that the plug cover 18 and the housing 14 of the reaction force of the coupling ring 55 are exposed and thereby the plug cover 18th by means of snap-on clip attachments 58 on the housing 14 or housing recesses 59 supports and at the same time the chambers 15, 19 to the atmosphere by contacting the coupling ring 55 sealed to a housing wall 60 and the plug cover shoulder 57 are.
  • the housing 14 can be made of a high quality plastic and the plug cover 18 consist of an inferior plastic, the latter is exposed to deformation during assembly, but remains dimensionally stable Adapts housing 14.
  • the pin 20 can be held overmolded with the pump cover 28 and into the bore 29 of the housing 14 may be pressed in, with longitudinal ribs 61 being deformed in the bore 29 and the pin 20 are adapted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)

Claims (16)

  1. Pompe à air électrique pour un dispositif de balayage d'un piège à charbon actif et éventuellement d'essai d'étanchéité temporaire dune installation de réservoir de carburant d'un moteur à combustion interne de véhicule, reliée à celui-ci, comprenant un moteur électrique à commutation électronique, qui est disposé conjointement avec la pompe à air dans un carter, caractérisée en ce que le carter (14) présente un premier compartiment (15), dans lequel est disposé un paquet statorique (16) dont les jonctions électriques (17) sont guidées vers l'extérieur au travers d'un couvercle emboítable (18), le couvercle emboítable (18) fermant hermétiquement le compartiment (15), et un second compartiment (19) est prévu, dans lequel est disposé sur un tourillon (20) un rotor (21) réalisé en forme de cloche, qui dépasse d'une distance minime d'une paroi cylindrique (22) de la zone du premier compartiment (15) dans laquelle est monté le paquet statorique (16), et présente sur le côté opposé au premier compartiment (15) un collet (23) doté de plusieurs organes de transport en forme d'ailettes, typiques de pompes tourbillonnaires, qui coopérent avac un canal annulaire (25) muni d'une section de séparation (26) entre deux tubulures de raccordement de fluide (27).
  2. Pompe à air suivant la revendication 1, caractérisée en ce que le canal annulaire (25) est formé d'une moitié de canal annulaire supérieure du carter (14) et d'une moitié inférieure d'un couvercle de pompe (28), le tourillon (20) étant maintenu d'un côté dans un alésage (29) du carter (14) et d'un autre côté dans un alésage (30) du couvercle de pompe (28).
  3. Pompe à air suivant la revendication 2, caractérisée en ce que le rotor (21) est fixé sur le tourillon (20) au moyen de deux paliers (31, 32) et présente pour augmenter l'écartement des paliers un appendice de moyeu (33), qui pénètre dans un bombement correspondant (34) du couvercle de pompe (28).
  4. Pompe à air-suivant l'une des ravendications 1, 2 et 3, caractérisée en ce que le paquet statorique (16) est bloqué en rotation par des nervures (35) qui sont disposées sur la paroi cylindriqus (22) du compartiment (15) et s'engagent dans des rainures corraspondantes (36) du paquet statorique (16), ces nervures (35) renforçant d'autre part la paroi cylindrique (22) relativement mince.
  5. Pompe à air suivant l'une des revendications 1 à 4, caractérisée en ce que le rotor (21) est formé dune matière plastique et présente une bague en matière magnétique (38) rapportée ou surmoulée.
  6. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que la bague en matière magnétique (38) présente sur son pourtour interne une aimantation latérale multipolaire.
  7. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que le carter (14) présente un bord d'écrasement (38), qui couvre la fente (42) existant entre la surface d'enveloppe extérieure (39) du rotor (21) ou de la bague en matière magnétique (38) et une paroi de fermeture cylindrique (41) du second compartiment (19), de sorte que des pertes par barbotage sont minimisées.
  8. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que les deux tubulures de raccordement (27) présentent une section d'entrée ou de sortie conique (44), grâce à quoi des formations de bruits sont évitées.
  9. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que le carter (14), le couvercle (18), le couvercle de pompe (28), ainsi que le rotor (21), sont formés de matière plastique, avantageusement de polysulfure de phénylène.
  10. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que l'un des paliers (31, 32) du rotor (21) est réalisé sous forme de roulement à billes (45) pour limiter le jeu axial du rotor (21) sur le tourillon (20).
  11. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que dans le paquet statorique (16) est emmnnchée une pièce centrale (48) formée de matière plastique, dans laquelle sont insérés plusieurs éléments de contact (49) qui présentent des crochets (50) soudés à des extrémités (51) d'enroulements, et qu'une plaquette (52) est mise en place sur la pièce centrale (48) et une jonction électrique réalisée par brasage sur les éléments de contact (49).
  12. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que la pompe à air (8) présente pour le découplage des bruits de structure une bague d'accouplement élastique (53), qui est fixée sur le carter (14) et est assemblée avec un support (54) pour le montage en un point de fixation du véhicule.
  13. Pompe à air suivant la revendication 12, caractérisée en ce que la bague d'accouplement (55) est sollicitée par un épaulement (57) du couvercle emboítable (18), de sorte que le couvercle (18) et le carter (14) sont exposés à la force de réaction de la bague d'accouplement (55), que le couvercle emboitable (18) s'appuie de ce fait sur le carter (14) ou sur des creux (59) du carter au moyen d'appendices d'accrochage (58) encliquetés, et que les compartiments (15, 19) sont simultanément étanchéifiés par rapport à l'atmosphère par appui de la bague d'accouplement (55) sur une paroi (60) du carter et sur l'épaulement (57) du couvercle emboítable.
  14. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que le carter (14) est formé d'une matière plastique de haute qualité, et le couvercle emboítable (18) d'une matière plastique de qualité moindre.
  15. Pompe à air suivant l'une des revendications précédentes, caractérisée en ce que le tourillon (20) est maintenu par enrobage avec le couvercle de pompe (28) et est emmanché dans l'alésage (29) du carter (14).
  16. Pompe à air suivant la revendication 15, caractérisée en ce que l'alésage (29) présente des nervures longitudinales (61), qui se déforment lors de l'emmanchement du tourillon (20) et s'adaptent au tourillon (20).
EP98109259A 1997-09-16 1998-05-22 Pompe à air entraínée par un moteur électrique Expired - Lifetime EP0907027B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740582A DE19740582A1 (de) 1997-09-16 1997-09-16 Elektrische Luftpumpe für eine Vorrichtung zum Spülen einer Aktivkohlefalle
DE19740582 1997-09-16

Publications (2)

Publication Number Publication Date
EP0907027A1 EP0907027A1 (fr) 1999-04-07
EP0907027B1 true EP0907027B1 (fr) 2003-01-02

Family

ID=7842441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98109259A Expired - Lifetime EP0907027B1 (fr) 1997-09-16 1998-05-22 Pompe à air entraínée par un moteur électrique

Country Status (4)

Country Link
US (1) US6036456A (fr)
EP (1) EP0907027B1 (fr)
DE (2) DE19740582A1 (fr)
ES (1) ES2186047T3 (fr)

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US6036456A (en) 2000-03-14
DE19740582A1 (de) 1999-03-18
EP0907027A1 (fr) 1999-04-07
DE59806801D1 (de) 2003-02-06
ES2186047T3 (es) 2003-05-01

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