WO2019015859A1 - Pompe à piston - Google Patents

Pompe à piston Download PDF

Info

Publication number
WO2019015859A1
WO2019015859A1 PCT/EP2018/065014 EP2018065014W WO2019015859A1 WO 2019015859 A1 WO2019015859 A1 WO 2019015859A1 EP 2018065014 W EP2018065014 W EP 2018065014W WO 2019015859 A1 WO2019015859 A1 WO 2019015859A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
piston
seal
pump piston
cap
Prior art date
Application number
PCT/EP2018/065014
Other languages
German (de)
English (en)
Inventor
Siamend Flo
Kerstin Koch
Frank Nitsche
Andreas PLISCH
Dietmar Uhlenbrock
Jurij Giesler
Ekrem CAKIR
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201880048470.1A priority Critical patent/CN110945240B/zh
Publication of WO2019015859A1 publication Critical patent/WO2019015859A1/fr

Links

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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston

Definitions

  • the invention relates to a piston pump, in particular a high-pressure fuel pump for an internal combustion engine, according to the preamble of claim 1.
  • Piston pumps are known from the prior art, the example. At
  • Such piston pumps have a gap seal between
  • Pump cylinder and pump piston are typically made of stainless steel. Such a gap seal requires high accuracy in the manufacture and assembly of pump cylinder and pump piston, resulting in high costs.
  • the invention has the object to provide a piston pump which has a sufficient degree of delivery even at low speeds, has a small size and is inexpensive to produce.
  • the piston pump according to the invention has a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing, a pump housing,
  • Sealing of the pumping chamber and a separate guide member for guiding the pump piston are arranged, wherein the seal is formed as a plastic ring and sits on the pump piston, that moves relative to the pump housing during operation with the pump piston.
  • Such a piston pump can be produced comparatively easily, which reduces the component costs. This is due to the fact that the complex to be manufactured pump cylinder is replaced by a seal assembly with a seal and at least one guide.
  • the pump piston When used as a sealing ring (plastic ring) seal is in particular a piston seal.
  • the pump piston has a seat, for example a shoulder on which the seal is seated. Through the seat, the seal is secured against displacement along an axial direction of the pump piston, in particular against displacement from the pumping chamber away.
  • the seal has a radially inner ring edge, a radially outer ring edge, a first end face and a second end face opposite the first end face.
  • the first end face may face the delivery chamber.
  • the second end face may be remote from the delivery chamber, in particular facing the seat of the pump piston.
  • the pump piston may be received in a recess in the housing and reciprocate therein.
  • the inner wall of the recess (inner surface) may form at least a portion of a tread for the pump piston.
  • the recess may be formed as a bore, possibly as a stepped bore.
  • a pump cylinder may be arranged between pump piston and pump housing. This can be manufactured with a lower manufacturing accuracy and thus more cost-effective than a conventional stainless steel pump cylinder, since the sealing and guiding function are taken over by the seal and the guide element.
  • the pump cylinder may be formed as a sleeve and arranged at a stage of the recess for the pump piston.
  • the inner surface of the pump cylinder forms at least a portion of the tread for the pump piston.
  • the pump cylinder can be omitted, whereby the number of components is reduced. A possible omission is i.a. Depending on which medium is promoted, how high the efficiency requirements and / or how long life of the piston pump should fail.
  • the gasket may be made of a PEEK (polyetheretherketone), PEAK, polyamideimide (PAI, e.g., a PAI available under the name Torion) or comparable materials.
  • the materials may additionally be reinforced and / or optimized by fillers.
  • the seal is in particular a high-pressure seal which has a high-pressure region (delivery chamber) in relation to a low-pressure region (region at the end of the delivery)
  • Guide element may be provided, which is arranged in a seal carrier of the piston pump. This is a comparatively large bearing distance to the (first) guide element realized. The leadership of the pump piston is thus significantly improved.
  • the further guide element may be annular (guide ring).
  • a cap (fixing cap) can be provided, which is applied to the pump piston and the seal secures axially.
  • the cap can be pressed onto the pump piston.
  • the cap has, in particular to the pumping chamber, a pressure relief hole. As a result, no pressure field can build up between the pump piston and the cap, which could widen the cap.
  • the seal may have a sealing lip.
  • the sealing lip can with a corresponding surface, for example.
  • Delivery chamber a relatively high pressure to be built. The largest deformation can take place at the tip of the sealing lip.
  • the sealing lip extends from a base portion of the gasket in
  • the geometry of the seal can be designed such that upon reaching the system pressure of the piston pump, a defined force on the running surface for the pump piston (inner surface of the recess for the pump piston) sets. This application force depends on the desired requirements (degree of delivery, wear over the service life, etc.).
  • the seal may be based on a U-ring seal, but optimized in design and having a sealing lip.
  • This sealing lip can be used for the tread for the pump piston and / or the inner surface of the
  • Pump cylinder have an oversize (pressure), an undersize (play) or a transition fit.
  • the seal can be designed with pressure to the running surface for the pump piston, for example, with an excess of 0.001 -0.3 mm (millimeters).
  • a retaining ring may be arranged on the outer circumference of the seal, which limits or prevents a radial widening of the seal by the pressure acting on the seal. This counteracts the force in the radial direction which attempts to widen the seal in diameter. This ensures that the seal is applied in a targeted manner, but not over a large area, to the running surface (inner surface of the recess for the pump piston). Friction and wear can thus be kept low.
  • the retaining ring may be formed of metal, in particular stainless steel, or the like.
  • the retaining ring may be fixed to the seal by pressure, adhesion, snap-in or the like.
  • the seal can be one
  • the seal may have at its radially inner edge of the ring to the outer surface of the pump piston a game.
  • the seal can be movable relative to the pump piston in the radial direction.
  • the seal in the radial direction can be aligned concentrically with the pump cylinder.
  • the game can be 0.1 - 1 mm (millimeters). It is advantageous if this radial clearance is greater than the clearance between the guide elements and the pump piston (further guide element) or the pump piston and the tread for the
  • the seal In the axial direction, the seal can be clamped, in particular between the seat (paragraph) and the cap. However, a positioning in radial Direction and an angular compensation between piston and seal should be present on the seal an axial clearance, for example. Of 0.01 -1 mm, in particular between the cap and the seal. In each suction phase of the pump piston (pump piston moves from
  • Seal in the axial direction of a force (contact pressure), which presses the seal away from the pumping chamber on the seat on the pump piston. During this phase, the seal can not or only slightly move in the radial direction due to the axial force.
  • the pump piston may have a shoulder on which the seal is seated and which rises radially outward toward the seal.
  • the seal may have an end portion corresponding to the heel and rising radially inward toward the heel. In this way, a sufficient seal in the form of a static sealing point is created. This prevents fuel from escaping from the delivery chamber and thus reduces the degree of delivery.
  • the shoulder surface may be conical or conical, i. the shoulder surface describes a portion of a lateral surface of a cone.
  • the (second) end face of the seal (axial sealing surface) may be spherical, i. the face describes a section of a
  • the sealing lip in particular on its outer contour, should have a continuous, preferably linear, geometry. In particular, this area should be notch. As a result, notch effect can be avoided, so that the service life of the seal increases.
  • the guide element may be formed as a radially projecting or raised portion of the cap, said portion with the running surface for the pump piston (inner surface of the recess for the
  • the section may be formed on the cap in particular circumferential.
  • the guide element is arranged on the conveying chamber facing side of the seal. This is advantageous in terms of cavitation.
  • the cap serves in this case both for fastening the seal and for guiding the pump piston.
  • Cavitation bubbles are created in the intake phase on the front side of the pump piston.
  • the guide member may be formed as a radially protruding or raised portion of the pump piston, wherein the portion cooperates with the running surface for the pump piston (inner surface of the recess for the pump piston).
  • the section may be formed on the pump piston in particular circumferentially.
  • the cap only fulfills the function of attaching the seal.
  • the guide is now taken over by the pump piston itself, in particular on the side facing away from the pumping chamber side of the seal. In this way, an application of the cap on the pump piston, in particular a pressing of the cap, simplified because even with a strong and / or different widening of the cap in the radial direction during application still allows accurate and reliable guidance by the pump piston.
  • spiral grooves can be formed in the lateral surface of the cap. Thus, possibly present on the seal cavitation bubbles from the sensitive area for the sealing function the sealing lip are promoted away.
  • the spiral grooves can be arranged in particular in the raised portion of the cap. Due to the spiral grooves flows in the delivery phase, the fluid and thus generates a
  • the surfaces for guidance and sealing i. the seal and the or the
  • Guide elements have a sufficient distance between each other, so that when running back and forth of the pump piston, the sections passed through the seal and the guide element do not overlap.
  • Figure 1 is a schematic representation of a fuel system with a
  • Figure 2 is a partial longitudinal section through the piston pump of Figure 1;
  • Figure 3 is an enlarged view of a pump piston, a seal, a retaining ring and a cap of the piston pump of Figure 1;
  • Figure 4 shows the seal and the retaining ring of Figure 3 in an enlarged and sectional view
  • FIG. 6 shows the cap from FIG. 3 in a side view
  • a fuel system of an internal combustion engine bears the reference numeral 10 as a whole. It comprises a fuel tank 12 from which an electric prefeed pump 14 conveys the fuel to a high-pressure fuel pump designed as a piston pump 16. This promotes the fuel further to a high-pressure fuel rail 18, to which several
  • Fuel! are connected injectors 20 which inject the fuel into combustion chambers, not shown, of the internal combustion engine.
  • the piston pump 16 includes an inlet valve 22, an outlet valve 24, and a pump housing 26.
  • a pump piston 28 is reciprocally accommodated.
  • the pump piston 28 is set in motion by a drive 30, wherein the drive 30 is shown only schematically in FIG.
  • the drive 30 may be a camshaft or an eccentric shaft.
  • the inlet valve 22 is designed as a quantity control valve, through which the pumped by the piston pump 16
  • Fuel quantity can be adjusted.
  • the structure of the piston pump 16 is shown in more detail from Figure 2, wherein only the essential components are mentioned below. It can be seen first that the pump piston 28 is designed as a stepped piston with a lower plunger section 32 in FIG. 2, a middle section 34 adjoining this and an upper end section 36 in FIG
  • Center section 34 has a larger diameter than the plunger section 32 and the end section 36.
  • the end portion 36 of the pump piston 28 bounded by means of a cap 38 applied to the end portion 36 together with the pump housing 26 a delivery chamber 39.
  • the pump piston 28 is reciprocally received in the pump housing 26 in a recess 40 formed there, which formed as a stepped bore 42 is.
  • a pump cylinder 44 is arranged at a stage 43 of the bore 42, which is radially expanded.
  • Pump cylinder 44 is sleeve-shaped.
  • Pump cylinder 44 forms a portion of a tread 48 for the
  • the pump cylinder 44 can be omitted.
  • the pump piston 28 can run directly in the pump housing 26.
  • the recess 40 in the pump housing 26 may then form the running surface for the seal 50 and also the guide surface for the pump piston 28.
  • the recess 40 can then as a continuous (non-stepped)
  • Bore 42 may be formed.
  • seal 50 for sealing the delivery chamber 39 is arranged.
  • the seal 50 is as
  • the cap 38 has a pressure relief bore 54.
  • a separate guide element 56 for guiding the pump piston 28 is arranged between pump piston 28 and pump housing 26.
  • the guide member 56 is formed as a radially protruding or raised portion 58 of the cap 38 and cooperates with the tread 48.
  • Section 58 is formed on the cap 38 circumferentially.
  • a further guide element 60 is provided for guiding the pump piston 28, which is arranged in a seal carrier 62 of the piston pump 16.
  • the further guide element 60 is annular
  • the seal 50 has a sealing lip 66, which cooperates with the running surface 48 for the pump piston 28 (see FIG. 3).
  • the sealing lip 66 interacts with the inner surface 46 of the pump cylinder 44 together.
  • the sealing lip 66 extends from a base section 68 of the seal 50 in the direction of the delivery chamber 39 (in FIG. 3 "upwards").
  • the sealing lip 66 rests with its free end 67 on the tread 48.
  • the sealing lip 66 is not scored in the transition 69 from the sealing lip 66 to the base portion 68 of the seal 50, in particular on the outer surface 71st
  • a retaining ring 70 which limits a radial expansion of the seal 50.
  • the retaining ring 70 may be disposed on a ring receiving portion 72 of the seal 50, which is radially tapered and having a shoulder 74 at one end.
  • the retaining ring 70 is attached to the seal 50.
  • the seal 50 has at its radially inner annular edge 76 to the outer surface of the pump piston 28, namely to the lateral surface of the end portion 36 of the pump piston 28, a radial clearance 77. In this way, the seal 50 can align concentrically with the pump cylinder 44.
  • the pump piston 28 has a shoulder 52 on which the seal 50 is seated.
  • the shoulder 52 rises radially outward to the seal
  • the shoulder 52 has a shoulder surface 78, which forms a sealing surface.
  • the shoulder surface 78 is conical or conical, i. the shoulder surface 78 describes a portion of a lateral surface of a cone.
  • the seal 50 has an end-side section 80 which corresponds to the shoulder and rises radially inward toward the shoulder 52.
  • the end-side section 80 has an end face 82, which forms a sealing surface.
  • the end face 82 is spherical, i. the end face 82 describes a portion of a spherical surface (spherical zone). This "ball-cone shape" results in a closed Dichtlinienzug, so that a static
  • Dichstelle 83 is formed.
  • the portions of the tread 48 which are used for the guiding and sealing function, can overlap each other axially, so that it can come here to an overlap 85 (see Figure 5). This means that depending on the axial position of the pump piston 28, a portion of the tread 48 from Guide element 56 and (before or after) can be traversed by the sealing lip 66.
  • the portions of the tread 48 which are used for the guiding and sealing function may have a sufficient distance between each other so that the
  • the cap 38 has a lateral surface 84 on which spiral grooves 86 are formed (see FIG. 6). In this case, the spiral grooves 86 are located in particular in the raised portion 58. Through the spiral grooves 86, a rotational flow can be generated in the delivery phase, which promotes any existing cavitation bubbles from the region of the sealing lip 66 away.
  • the seal is based on the following effect: In the delivery phase (pump piston
  • FIG 7 An alternative embodiment of the piston pump 16 is shown in Figure 7, which largely corresponds to the embodiment described above and are provided in the same or functionally identical elements with identical reference numerals. Notwithstanding this, in the alternative embodiment, the guide member 56 is designed to guide the pump piston 28 as a radially projecting or raised portion 88 of the pump piston 28 and cooperates with the tread 48. The section 88 is formed on the pump piston 28 circumferentially. In this embodiment, the cap 38 serves only for axial securing of

Abstract

Pompe à piston (16), en particulier pompe à carburant haute pression pour un moteur à combustion interne, comprenant un corps de pompe (26), un piston de pompe (28) et une chambre de refoulement (39) délimitée au moins par le corps de pompe (26) et le piston de pompe (28) Selon l'invention, un élément d'étanchéité (50) servant à rendre étanche la chambre de refoulement (39) et un élément de guidage séparé (56) servant à guider le piston de pompe (28) sont disposés de préférence entre le piston de pompe (28) et le corps de pompe (26), l'élément d'étanchéité (50) étant réalisé sous la forme d'une bague en matière plastique et reposant sur le piston de pompe (28).
PCT/EP2018/065014 2017-07-20 2018-06-07 Pompe à piston WO2019015859A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880048470.1A CN110945240B (zh) 2017-07-20 2018-06-07 活塞泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017212490.3A DE102017212490A1 (de) 2017-07-20 2017-07-20 Kolbenpumpe, insbesondere Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
DE102017212490.3 2017-07-20

Publications (1)

Publication Number Publication Date
WO2019015859A1 true WO2019015859A1 (fr) 2019-01-24

Family

ID=62631057

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/065014 WO2019015859A1 (fr) 2017-07-20 2018-06-07 Pompe à piston

Country Status (3)

Country Link
CN (1) CN110945240B (fr)
DE (1) DE102017212490A1 (fr)
WO (1) WO2019015859A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102308064B1 (ko) * 2020-09-03 2021-10-05 주식회사 현대케피코 고압펌프

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020214037A1 (de) * 2020-04-03 2021-10-07 Robert Bosch Gesellschaft mit beschränkter Haftung Kraftstoff-Hochdruckpumpe
DE102021214501A1 (de) 2021-12-16 2023-06-22 Robert Bosch Gesellschaft mit beschränkter Haftung Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002400A1 (de) * 2008-06-12 2009-12-17 Robert Bosch Gmbh Kolbenpumpe
DE102013226062A1 (de) * 2012-12-20 2014-06-26 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
DE102014202809A1 (de) * 2014-02-17 2015-08-20 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
DE102014224724A1 (de) * 2014-12-03 2016-06-09 Robert Bosch Gmbh Hochdruckpumpe
DE102014226316A1 (de) * 2014-12-17 2016-06-23 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005299808A (ja) * 2004-04-13 2005-10-27 Nok Corp ポンプ用シール
DE102006036442A1 (de) * 2006-08-04 2008-02-07 Robert Bosch Gmbh Dicht- und Führungseinrichtung für einen Kolben einer Kolbenpumpe
DE102012203931A1 (de) * 2011-08-02 2013-02-07 Continental Teves Ag & Co. Ohg Kolbenpumpe
US9174620B2 (en) * 2013-01-21 2015-11-03 Kelsey-Hayes Company Slip control braking pump having a high pressure sealing structure
CN203685552U (zh) * 2013-09-26 2014-07-02 姬胜国 一种防活塞泵筒间隙漏油的抽油泵

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008002400A1 (de) * 2008-06-12 2009-12-17 Robert Bosch Gmbh Kolbenpumpe
DE102013226062A1 (de) * 2012-12-20 2014-06-26 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
DE102014202809A1 (de) * 2014-02-17 2015-08-20 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
DE102014224724A1 (de) * 2014-12-03 2016-06-09 Robert Bosch Gmbh Hochdruckpumpe
DE102014226316A1 (de) * 2014-12-17 2016-06-23 Robert Bosch Gmbh Kolben-Kraftstoffpumpe für eine Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102308064B1 (ko) * 2020-09-03 2021-10-05 주식회사 현대케피코 고압펌프

Also Published As

Publication number Publication date
CN110945240B (zh) 2022-05-13
DE102017212490A1 (de) 2019-01-24
CN110945240A (zh) 2020-03-31

Similar Documents

Publication Publication Date Title
EP3655650B1 (fr) Pompe à piston
EP2935860B1 (fr) Pompe à carburant à piston pour moteur à combustion interne
EP1727983B1 (fr) Pompe haute pression, notamment destinee a un dispositif d'injection de carburant d'un moteur a combustion interne
WO2019015863A1 (fr) Pompe a piston, notamment pompe a carburant haute pression destinee a un moteur a combustion interne
EP3108136B1 (fr) Pompe à essence à piston pour moteur à combustion interne
EP3108137B1 (fr) Pompe à carburant à piston pour moteur à combustion interne
WO2019015859A1 (fr) Pompe à piston
DE102014202809A1 (de) Kolben-Kraftstoffpumpe für eine Brennkraftmaschine
EP3108135B1 (fr) Pompe à essence à piston pour moteur à combustion interne
EP2205867B1 (fr) Pompe à piston destinée au refoulement d'un fluide et système de freinage associé
WO2014048606A1 (fr) Pompe, en particulier pompe à carburant haute pression pour un système d'injection d'un moteur à combustion interne
EP1929154B1 (fr) Pompe a piston
EP3655649B1 (fr) Pompeà piston, en particulier une pompe à injection de carburant haute pression pour un moteur à combustion
DE102013210019A1 (de) Hochdruckpumpe für ein Kraftstoffeinspritzsystem mit einem Saugventil
WO2019081239A1 (fr) Compresseur à piston
WO2016142072A1 (fr) Pompe à haute pression de carburant, notamment pour un dispositif d'injection de carburant d'un moteur à combustion interne
WO2016008626A1 (fr) Pompe, en particulier pompe à carburant haute pression destinée à un système d'injection de carburant d'un moteur à combustion interne
DE102021202371A1 (de) Kolbenpumpe, insbesondere Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
DE102021209531A1 (de) Kolbenpumpe, insbesondere Kraftstoff-Hochdruckpumpe für eine Brennkraftmaschine
DE102021201388A1 (de) Kraftstoff-Hochdruckpumpe, sowie Verfahren zur Herstellung einer Kraftstoff-Hochdruckpumpe
WO2015139871A1 (fr) Pompe, en particulier pompe à carburant haute pression pour un dispositif d'injection de carburant d'un moteur à combustion interne
WO2017032484A1 (fr) Pompe, en particulier pompe à carburant haute pression pour un dispositif d'injection de carburant d'un moteur à combustion interne

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18731759

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18731759

Country of ref document: EP

Kind code of ref document: A1