EP1389684B1 - Pompe d'amorçage multicouche. - Google Patents
Pompe d'amorçage multicouche. Download PDFInfo
- Publication number
- EP1389684B1 EP1389684B1 EP03291743A EP03291743A EP1389684B1 EP 1389684 B1 EP1389684 B1 EP 1389684B1 EP 03291743 A EP03291743 A EP 03291743A EP 03291743 A EP03291743 A EP 03291743A EP 1389684 B1 EP1389684 B1 EP 1389684B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- priming pump
- inner layer
- layer
- envelope
- polyamide
- 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
Links
Images
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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/16—Feeding by means of driven pumps characterised by provision of personally-, e.g. manually-, operated pumps
Definitions
- the invention relates to a priming pump intended in particular to equip a fuel supply circuit of a motor vehicle.
- Priming pumps made of elastomer and having an envelope with an elastically deformable central zone between a state of rest in which the envelope has a maximum volume and a pressed state are known.
- the envelope comprises connection zones at the inlet and at the outlet of the central zone which comprise directional valves arranged to allow the passage of the fluid in a given direction as the pressures exerted on the envelope.
- the new motor engines (including diesel engines with common injection rail) have the particularity of working at a high average temperature, the fuel can for example be increased to 125 ° Celsius continuously or 150 ° Celsius peak.
- the priming pumps can be mounted in parallel with the injection pump on the supply circuit and no longer in series with it, so that that the inside of the priming pump is no longer swept by the fuel flow but on the contrary contains stagnant fuel.
- the additives contained in the new fuels provided for this type of engine are particularly corrosive to the material of the envelope, especially at high temperature.
- the stagnant fuel infiltrates naturally into the pores of the shell material, which tends to wash the latter of the loads included in the material which give it elasticity.
- Document is known US 2,954,048 a single layer elastomer pump.
- the document US 3,987,775 describes a pump with two independent concentric envelopes, the outer envelope being more rigid, and the inner flexible envelope.
- the invention aims to provide a priming pump does not have the aforementioned drawbacks.
- a multilayer priming pump with an envelope comprising an elastic outer layer of elastomeric material and an inner layer forming a barrier for the fluid present inside the pump.
- the inner layer prevents the fuel from entering or chemically reacting with the elastomer of the outer layer.
- the latter can be made of a current type elastomer, which, subject only to temperature variations, is able to keep its elastic properties over time.
- the casing thus obtained is certainly more expensive than a monolayer elastomer casing current, but still remains at a much lower cost than a monolayer envelope fluoroelastomer. In addition, its recycling is easier.
- a priming pump casing comprises in known manner a central zone 1 of large diameter and deformable by hand, the central zone being associated with connecting zones 2 which extend from one side to another. other of this and which contain directional valves (not shown).
- the casing of the priming pump is multilayer and comprises an outer layer 3 and an inner layer 4.
- the outer layer 3 is here made of elastomer of the current type, preferably a thermoplastic based on polyether ester (TPEE), which makes it possible to give the central zone 1 of the envelope a good elasticity and which is resistant to variations high temperatures.
- TPEE polyether ester
- an intermediate bonding layer may be provided between the outer layer 3 and the inner layer 4 to ensure good adhesion of the two layers together.
- the materials recommended according to the invention for the inner layer 4 are generally less elastic than the material used for the outer layer 3, so that the thicknesses of the layers are likely to affect the elasticity of the priming pump.
- the central zone 1 of the envelope has a diameter of 40 mm, the minimum thicknesses of the inner and outer layers being 0.3 mm and 0.55 mm respectively, while the connecting zones 2 have a diameter of 21 mm and the minimum thicknesses of the inner and outer layers are 0.55 mm and 0.85 mm respectively.
- the inner layer has a local relative thickness of between 30% and 40% of the total local thickness of the envelope.
- This range of relative thickness makes it possible to preserve a satisfactory elasticity of the envelope.
- Such priming pumps can be obtained by coextrusion of the constituent layers of the pumps to form a multilayer tube, then forming the tube (for example by means of a mobile mold device placed at the extruder outlet) in a series of pumps. of priming, that it is enough then to debit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Laminated Bodies (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Rotary Pumps (AREA)
- External Artificial Organs (AREA)
Description
- L'invention concerne une pompe d'amorçage notamment destinée à équiper un circuit d'alimentation en carburant d'un véhicule automobile.
- On connaît des pompes d'amorçage réalisées en élastomère et présentant une enveloppe avec une zone centrale élastiquement déformable entre un état de repos dans laquelle l'enveloppe a un volume maximal et un état pressé. L'enveloppe comporte des zones de raccord en entrée et en sortie de la zone centrale qui comportent des clapets directionnels agencés pour permettre le passage du fluide dans un sens déterminé au fur et à mesure des pressions exercées sur l'enveloppe.
- Les nouveaux moteurs automobiles (notamment les moteurs diesel à rampe d'injection commune) ont pour particularité de travailler à une température moyenne importante, le carburant pouvant par exemple être porté à 125° Celsius en continu, voire 150° Celsius en pointe.
- Par ailleurs, dans les circuits d'alimentation prévus pour ce type de moteur, les pompes d'amorçage peuvent être montées en dérivation de la pompe d'injection sur le circuit d'alimentation et non plus en série avec celle-ci, de sorte que l'intérieur de la pompe d'amorçage n'est plus balayé par le flux de carburant mais au contraire contient du carburant stagnant.
- On a constaté que dans de telles conditions, les matériaux actuellement utilisés pour la réalisation des enveloppes ont tendance à vieillir prématurément, pour diverses raisons.
- D'une part, à l'amplitude importante des variations de température s'ajoute l'acidité qu'acquiert le carburant aux températures élevées, ce qui, combiné, provoque une dégradation prématurée de l'enveloppe.
- D'autre part, les additifs contenus dans les nouveaux carburants prévus pour ce type de moteurs sont particulièrement corrosifs pour le matériau de l'enveloppe, surtout à haute température.
- En outre, le carburant stagnant s'infiltre naturellement dans les pores du matériau de l'enveloppe, ce qui tend à laver celui-ci des charges incluses dans le matériau qui lui confèrent son élasticité.
- Pour réaliser une enveloppe de pompe d'amorçage répondant à de telles contraintes, on a songé à utiliser un matériau de type fluoroélastomère, qui résiste aux agressions à la fois chimiques et thermiques et garde son élasticité dans le temps. Mais outre que ce matériau est bien trop onéreux pour envisager son utilisation dans le cadre d'une production de masse, il se révèle peu recyclable.
- On connaît du document
US 2 954 048 une pompe monocouche en élastomère. Le documentUS 3 987 775 décrit une pompe à deux enveloppes concentriques indépendantes, l'enveloppe externe étant plus rigide, et l'enveloppe interne souple. - L'invention a pour objet de proposer une pompe d'amorçage ne présentant pas les inconvénients précités.
- Selon l'invention, on propose une pompe d'amorçage multicouche avec une enveloppe comprenant une couche externe élastique en matériau élastomère et une couche interne formant barrière pour le fluide présent à l'intérieur de la pompe.
- La couche interne empêche le carburant de pénétrer dans l'élastomère de la couche externe ou de réagir chimiquement avec celui-ci.
- Dès lors, cette dernière peut être réalisée en un élastomère de type courant, qui, soumis uniquement aux variations de température, est capable de garder ses propriétés élastiques dans le temps.
- L'enveloppe ainsi obtenue est certes plus onéreuse qu'une enveloppe monocouche en élastomère courant, mais reste néanmoins d'un coût bien plus faible qu'une enveloppe monocouche en fluoroélastomère. De plus, son recyclage est plus aisé.
- D'autres caractéristiques et avantages de l'invention ressortiront à la lumière de la description qui suit d'un mode de réalisation particulier non limitatif de l'invention, en référence à l'unique figure annexée qui représente une enveloppe de pompe d'amorçage selon l'invention en coupe longitudinale.
- En référence à la figure, une enveloppe de pompe d'amorçage comporte de façon connue en soi une zone centrale 1 de grand diamètre et déformable à la main, la zone centrale étant associée à des zones de raccord 2 qui s'étendent de part et d'autre de celle-ci et qui contiennent des clapets directionnels (non représentés).
- Selon l'invention, l'enveloppe de la pompe d'amorçage est multicouche et comprend une couche externe 3 et une couche interne 4.
- La couche externe 3 est ici réalisée en élastomère de type courant, de préférence un thermoplastique à base d'ester de polyether (TPEE), qui permet de conférer à la zone centrale 1 de l'enveloppe une bonne élasticité et qui résiste à des variations de températures importantes.
- La couche interne 4 sera quant à elle réalisée de préférence dans les matériaux suivants :
- polyamide (PA) ;
- polyphénylène de sulfone (PPS)
- mélange de sulfone de polyphénylène (PPS) et de polyamide (PA) ;
- mélange de polyamide (PA) et de polyoléfine (PO);
- téréphtalate de polybutylène (PBT).
- Ces matériaux forment des barrières efficaces pour une grande variété de carburants, comme les carburants à base d'hydrocarbure ou encore à base d'alcool ou d'ester.
- Le cas échéant, une couche intermédiaire de liaison pourra être prévue entre la couche externe 3 et la couche interne 4 afin d'assurer une bonne adhésion des deux couches entre elles.
- Les matériaux préconisés selon l'invention pour la couche interne 4 sont en général moins élastiques que le matériau utilisé pour la couche externe 3, de sorte que les épaisseurs des couches sont susceptibles d'influer sur l'élasticité de la pompe d'amorçage.
- Dans l'exemple de réalisation illustré, la zone centrale 1 de l'enveloppe a un diamètre de 40 mm, les épaisseurs minimales des couches interne et externe étant de 0,3 mm et 0,55 mm respectivement, tandis que les zones de raccord 2 ont un diamètre de 21 mm et les épaisseurs minimales des couches interne et externe sont de 0,55 mm et 0,85 mm respectivement.
- De nombreux essais ont été menés, qui ont conduit à retenir les géométries suivantes :
- épaisseur de la couche interne : 0,1 à 1 mm
- épaisseur de la couche externe : 0,1 à 2 mm
- De préférence, la couche interne a une épaisseur relative locale comprise entre 30 % et 40 % de l'épaisseur totale locale de l'enveloppe.
- Cette plage d'épaisseur relative permet de préserver une élasticité satisfaisante de l'enveloppe.
- De telles pompes d'amorçage peuvent être obtenues par coextrusion des couches constitutives des pompes pour former un tube multicouche, puis formage du tube (par exemple au moyen d'un dispositif à moules mobiles placé en sortie d'extrudeuse) en un chapelet de pompes d'amorçage, qu'il suffit alors de débiter.
Claims (6)
- Pompe d'amorçage, comprenant une enveloppe avec une zone centrale (1) élastiquement déformable raccordée à deux zones de raccord (2), caractérisée en ce que l'enveloppe est multicouche et comprend une couche externe (3) réalisée en matériau élastomère et une couche interne (4) solidaire de la couche externe et réalisée en matériau formant barrière pour le fluide présent à l'intérieur de la pompe.
- Pompe d'amorçage selon la revendication 1, caractérisée en ce que l'enveloppe comporte en outre une couche intermédiaire de liaison entre la couche externe (3) et la couche interne (4).
- Pompe d'amorçage selon la revendication 1, caractérisé en ce que la couche interne (4) est réalisée dans l'un des matériaux suivants :- polyamide ;- polyphénylène de sulfone ;- mélange de sulfone de polyphényléne et de polyamide ;- mélange de polyamide et de polyoléfine ;- téréphtalate de polybutylène.
- Pompe d'amorçage selon la revendication 1, caractérisée en ce que la couche interne (4) a une épaisseur comprise entre 0,1 mm et 1 mm.
- Pompe d'amorçage selon la revendication 1, caractérisée en ce que la couche externe (3) a une épaisseur comprise entre 0,1 mm et 2 mm.
- Pompe d'amorçage selon la revendication 1, caractérisé en ce que la couche interne (4) a une épaisseur relative locale comprise entre 30% et 40% de l'épaisseur totale locale de l'enveloppe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200331475T SI1389684T1 (sl) | 2002-08-13 | 2003-07-15 | Večplastna črpalka za nasesavanje |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0210265A FR2843619B1 (fr) | 2002-08-13 | 2002-08-13 | Pompe d'amorcage multicouche |
FR0210265 | 2002-08-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1389684A1 EP1389684A1 (fr) | 2004-02-18 |
EP1389684B1 true EP1389684B1 (fr) | 2008-09-24 |
Family
ID=30471098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03291743A Expired - Lifetime EP1389684B1 (fr) | 2002-08-13 | 2003-07-15 | Pompe d'amorçage multicouche. |
Country Status (12)
Country | Link |
---|---|
US (1) | US7021195B2 (fr) |
EP (1) | EP1389684B1 (fr) |
JP (1) | JP2004076729A (fr) |
AT (1) | ATE409284T1 (fr) |
BR (1) | BR0302754A (fr) |
DE (1) | DE60323714D1 (fr) |
ES (1) | ES2314166T3 (fr) |
FR (1) | FR2843619B1 (fr) |
MX (1) | MXPA03007057A (fr) |
PL (1) | PL361511A1 (fr) |
RU (1) | RU2277184C2 (fr) |
SI (1) | SI1389684T1 (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080095342A1 (en) * | 2004-12-29 | 2008-04-24 | Amedeo Imbimbo | Interception Of Cashless Calling Service Subscription |
US8631777B2 (en) | 2008-02-08 | 2014-01-21 | Bluskies International Llc | Rigid primer bulb pump |
US8069830B2 (en) * | 2008-02-08 | 2011-12-06 | Christopher Brown | Rigid primer bulb pump |
FR2941500B1 (fr) * | 2009-01-29 | 2011-07-15 | Peugeot Citroen Automobiles Sa | Pompe d'amorcage manuelle d'un circuit d'alimentation en carburant d'un moteur a combustion |
FR2948731B1 (fr) | 2009-07-29 | 2014-05-09 | Peugeot Citroen Automobiles Sa | Dispositif et procede d'amorcage d'un circuit de carburant d'un moteur a combustion |
US8403654B2 (en) * | 2010-03-31 | 2013-03-26 | Rl Hudson & Company | Low fuel permeation primer bulb |
US20120070325A1 (en) * | 2010-09-17 | 2012-03-22 | Wireman Justin Mccord | Multi-layer primer apparatus and methods |
CN102452094A (zh) | 2010-10-28 | 2012-05-16 | 吉列公司 | 分配液体的毛发移除套件 |
CN102452095B (zh) | 2010-10-28 | 2014-10-29 | 吉列公司 | 用于分配液体的毛发移除装置的施用装置 |
CN102452088B (zh) | 2010-10-28 | 2015-07-01 | 吉列公司 | 具有刀片架保持覆盖件的毛发移除装置 |
CN102452091B (zh) | 2010-10-28 | 2015-08-12 | 吉列公司 | 用于毛发移除装置的具有导流板的施用装置 |
CN102452092B (zh) | 2010-10-28 | 2015-04-01 | 吉列公司 | 分配液体的毛发移除装置 |
CN102452085B (zh) | 2010-10-28 | 2016-01-27 | 吉列公司 | 用于分配液体的毛发移除装置的泵 |
US9156175B2 (en) | 2011-12-09 | 2015-10-13 | The Gillette Company | Fluid applicator for a personal-care appliance |
CN102410116A (zh) * | 2011-12-19 | 2012-04-11 | 芜湖盛力制动有限责任公司 | 商用车柴油机燃油系统手动输油泵 |
CN113565659A (zh) * | 2021-07-20 | 2021-10-29 | 河北华北柴油机有限责任公司 | 一种手打燃油泵可靠性考核方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US523345A (en) * | 1894-07-24 | Syringe | ||
GB684598A (en) * | 1946-12-09 | 1952-12-24 | Carter Carburetor Corp | Coated fabrics suitable for use as a diaphragm for a fuel pump |
US2954048A (en) * | 1959-02-05 | 1960-09-27 | Frank J Rychlik | Pump and valve therefor |
US3839983A (en) * | 1973-02-05 | 1974-10-08 | Ausland R Mc | Bilge pump having snubbing action |
JPS5163502U (fr) * | 1974-11-14 | 1976-05-19 | ||
US3987775A (en) * | 1975-04-16 | 1976-10-26 | Walbro Corporation | Squeeze-tube primer for internal combustion engines |
JPS52149604A (en) * | 1976-06-07 | 1977-12-12 | Walbro Corp | Primer pumps |
JPS57134377U (fr) * | 1981-02-18 | 1982-08-21 | ||
JPS61130756U (fr) * | 1985-01-31 | 1986-08-15 | ||
US4886432A (en) * | 1988-06-23 | 1989-12-12 | Engineering Enterprises, Inc. | Bladder pump assembly |
JPH0447185U (fr) * | 1990-08-24 | 1992-04-22 | ||
CA2126246A1 (fr) * | 1992-10-30 | 1994-05-11 | Jean-Claude Douchet | Canalisation de fluide realisee en matiere plastique, notamment pour raccorder le reservoir de carburant d'un vehicule au moteur dudit vehicule |
FR2703403B1 (fr) * | 1993-03-29 | 1995-07-07 | Meillor Sa | Poire d'amorçage notamment d'un circuit de carburant pour moteur diesel. |
JPH09234827A (ja) * | 1996-02-28 | 1997-09-09 | Toyoda Gosei Co Ltd | 層状成形体 |
US5970935A (en) * | 1998-09-03 | 1999-10-26 | Federal-Mogul World Wide, Inc. | Fuel system primer bulb |
JP4556333B2 (ja) * | 2000-10-03 | 2010-10-06 | 東海ゴム工業株式会社 | 自動車用ホース |
-
2002
- 2002-08-13 FR FR0210265A patent/FR2843619B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-15 ES ES03291743T patent/ES2314166T3/es not_active Expired - Lifetime
- 2003-07-15 EP EP03291743A patent/EP1389684B1/fr not_active Expired - Lifetime
- 2003-07-15 SI SI200331475T patent/SI1389684T1/sl unknown
- 2003-07-15 DE DE60323714T patent/DE60323714D1/de not_active Expired - Lifetime
- 2003-07-15 AT AT03291743T patent/ATE409284T1/de not_active IP Right Cessation
- 2003-07-30 PL PL03361511A patent/PL361511A1/xx not_active IP Right Cessation
- 2003-08-01 JP JP2003205332A patent/JP2004076729A/ja active Pending
- 2003-08-07 MX MXPA03007057A patent/MXPA03007057A/es active IP Right Grant
- 2003-08-08 US US10/636,693 patent/US7021195B2/en not_active Expired - Fee Related
- 2003-08-08 BR BR0302754-6A patent/BR0302754A/pt active Search and Examination
- 2003-08-12 RU RU2003125140/06A patent/RU2277184C2/ru not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2314166T3 (es) | 2009-03-16 |
FR2843619A1 (fr) | 2004-02-20 |
JP2004076729A (ja) | 2004-03-11 |
RU2003125140A (ru) | 2005-02-27 |
DE60323714D1 (de) | 2008-11-06 |
US7021195B2 (en) | 2006-04-04 |
SI1389684T1 (sl) | 2009-04-30 |
FR2843619B1 (fr) | 2006-01-06 |
MXPA03007057A (es) | 2004-10-15 |
PL361511A1 (en) | 2004-02-23 |
BR0302754A (pt) | 2004-08-24 |
RU2277184C2 (ru) | 2006-05-27 |
ATE409284T1 (de) | 2008-10-15 |
US20040033143A1 (en) | 2004-02-19 |
EP1389684A1 (fr) | 2004-02-18 |
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