EP3152434B1 - Pompe à carburant à haute pression, comprenant une soupape d'évacuation pourvue d'une bille et d'un corps - Google Patents

Pompe à carburant à haute pression, comprenant une soupape d'évacuation pourvue d'une bille et d'un corps Download PDF

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Publication number
EP3152434B1
EP3152434B1 EP15706759.6A EP15706759A EP3152434B1 EP 3152434 B1 EP3152434 B1 EP 3152434B1 EP 15706759 A EP15706759 A EP 15706759A EP 3152434 B1 EP3152434 B1 EP 3152434B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel pump
pressure fuel
webs
section
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.)
Active
Application number
EP15706759.6A
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German (de)
English (en)
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EP3152434A1 (fr
Inventor
Sebastian Peissner
Gerd Teike
Michael Kleindl
Soeren Stritzel
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP3152434A1 publication Critical patent/EP3152434A1/fr
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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
    • 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
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"

Definitions

  • the invention relates to a high-pressure fuel pump according to the preamble of claim 1.
  • High-pressure fuel pumps in particular piston pumps for a fuel system for an internal combustion engine, are known from the market.
  • high pressure fuel pumps include an intake valve and an exhaust valve which can open and close depending on control and / or fuel pressure.
  • the exhaust valve makes it possible to close a pressurized fuel reservoir ("rail") against a delivery chamber of the high-pressure fuel pump during a suction stroke. If, on the other hand, a fuel pressure in the delivery chamber exceeds a counterforce plus a closing spring force caused by the pressure in the fuel accumulator, the exhaust valve can open.
  • a high-pressure fuel pump is for example from the EP 2 647 827 A1 known.
  • the invention relates to a high-pressure fuel pump, comprising an outlet valve with a valve ball and a valve body, which has a sealing portion on which a sealing seat is present, and which has a guide portion in which the valve ball is guided.
  • the guide section comprises a first plurality of axially projecting webs, between which first flow paths are formed, wherein at least between two adjacent of the webs an opening is provided radially outward.
  • the webs can guide the valve ball radially, without severely hindering the hydraulic flow.
  • the webs have no common radially outwardly encircling collar or the like.
  • an area can be flowed through radially outside of the webs of fuel with the exhaust valve open, whereby a hydraulic cross section can be increased and the delivery rate of the high-pressure fuel pump can be improved.
  • the webs are designed as free from the sealing portion axially projecting webs.
  • the webs are connected only at one axial end portion - preferably in one piece - with the valve body.
  • the hydraulic cross section can be further improved.
  • the webs have a nikringsektorartigen cross-section.
  • a radial flow formed in the region of the webs can take place with a particularly large cross section.
  • a material cross section of the webs can be optimized, whereby a fatigue strength can be improved.
  • other, for example circular or polygonal cross-sections are conceivable.
  • the valve body has a smaller outer diameter in the region of the guide section than in the region of the sealing section.
  • the valve body is arranged in a housing of the high-pressure fuel pump, preferably pressed into this. Then, a radial area between the webs and the housing can be advantageously exploited for the hydraulic flow, whereby the hydraulic cross section can be further improved.
  • the guide section can be decoupled from a radially outer pressing area on the valve body.
  • the outlet valve has a stop body for the valve ball with a stop section which limits the opening stroke of the valve ball, the stop body having a second plurality of radial recesses distributed uniformly in the circumferential direction and forming second flow paths, the second plurality of second Flow paths are selected such that regardless of the radial orientation of the stopper body at least a second flow path at least partially overlaps a first flow path.
  • a valve spring which acts on the valve ball with an axial force against the sealing seat, is supported on the stop body.
  • the stopper body may be partially executed in approximately cup-shaped, wherein the valve spring is received radially within the stopper body.
  • valve spring is designed as a helical spring and in an axial direction has different diameters, in particular is waisted.
  • the function of the valve spring in particular when the valve spring is received radially inside the stop body, can be improved.
  • a friction between the valve spring and the stopper body can be reduced or even prevented, whereby a fatigue strength can be increased.
  • the stopper body and / or the valve body are according to a method of metal powder injection molding, MIM, manufactured.
  • MIM metal powder injection molding
  • the first plurality and the second plurality are different.
  • a radial "interference" between the first and the second flow paths results, so to speak, resulting in a radially uniform distribution of the webs or the recesses, whereby a total resulting hydraulic opening cross-section substantially independent of a radial angle between the guide portion and the stopper body is.
  • the function of the exhaust valve is improved and the assembly is simplified because the elements need not be aligned in the circumferential direction.
  • the stopper body can be designed as a stamped part and / or deep-drawn part. This can save weight and reduce manufacturing costs.
  • FIG. 1 shows a simplified diagram of a high-pressure fuel pump 10 in an axial sectional view.
  • the high-pressure fuel pump 10 is an element of a fuel system, not shown, of an internal combustion engine, not shown, of a motor vehicle.
  • the high-pressure fuel pump 10 has a housing 12, in whose left section in the drawing, an electromagnet 14 with a magnetic coil 16, an armature 18 and an armature spring 20 is arranged.
  • the high-pressure fuel pump 10 comprises an inlet 24 connected to a low-pressure line 22 with an inlet valve 26, and an outlet 30 connected to a high-pressure line 28 with an outlet valve 32.
  • a high-pressure accumulator (rail) connected to the high-pressure line 28 is not shown.
  • the outlet valve 32 In an open state, the outlet valve 32 is hydraulically connected via an opening 34 to a delivery chamber 36.
  • the exhaust valve 32 includes a valve ball 38 and a valve spring 40 and is in the FIG. 1 shown only very schematically. Below at the Figures 2 . 3 and 4 the exhaust valve 32 will still be shown and described in detail.
  • the inlet valve 26 comprises a valve spring 42 and a valve body 44.
  • the valve body 44 can be moved by means of a valve needle 46, which can be moved horizontally in the drawing and coupled to the armature 18. If the solenoid 14 is energized, the valve needle 46 moves in FIG. 1 to the left, and so the inlet valve 26 can be closed by the force of the valve spring 42.
  • the inlet valve 26 can be forcibly opened by the force of the armature spring 20.
  • a piston 48 is arranged vertically movable in the drawing. The piston 48 can be moved by means of a roller 50 from a - in this case elliptical - cam 52 in a cylinder 54.
  • the cylinder 54 is formed in a portion of the housing 12.
  • the inlet valve 26 is hydraulically connected via an opening 56 to the delivery chamber 36.
  • the high-pressure fuel pump 10 delivers fuel from the inlet 24 to the outlet 30, the outlet valve 32 opening or closing in accordance with a respective pressure difference between the delivery chamber 36 and the outlet 30 and the high-pressure line 28, respectively.
  • the inlet valve 26 is acted upon by a respective pressure difference between the inlet 24 and the delivery chamber 36 at full delivery, but also by the valve needle 46 or the electromagnet 14 during partial delivery.
  • FIG. 2 shows an axial sectional view of the exhaust valve 32, which is arranged in the housing 12 of the high pressure fuel pump 10.
  • the housing of the outlet valve 32 is separate from the housing 12 of the high-pressure fuel pump 10.
  • the outlet valve 32 is designed essentially rotationally symmetrical or radially symmetrical and comprises four elements: a valve body 58 (in the drawing on the left), a stop body 60 (in the drawing on the right), the valve ball arranged axially centrally between the valve body 58 and the stop body 60 38, and designed as a helical spring valve spring 40th
  • the valve spring 40 acts on the valve ball 38 in the closing direction and is received in a recess 62 of the stopper body 60.
  • the valve spring 40 is supported on a bottom (in the drawing on the right, without reference numeral) of the stopper body 60.
  • a radially inner boundary surface of the recess 62 forms a guide for the valve spring 40.
  • the recess 62 has a simple cylindrical cross section.
  • the bottom has an axial central opening 64, which has a smaller diameter than the valve spring 40.
  • the valve spring 40 in an axial direction (continuous) different diameters and is designed here waisted.
  • valve ball 38 facing edge of the recess 62 in the stopper body 60 forms an annular stop portion 66 for the valve ball 38.
  • annular stop portion 66 limits the stopper body 60 by means of the stopper portion 66 an opening stroke of the valve ball 38th
  • a linear annular sealing seat 68 is formed on the valve body 58.
  • the valve body 58 has a guide portion 70, in which the valve ball 38 is guided radially.
  • the guide section 70 includes a first plurality of axially projecting webs 72, which are arranged distributed uniformly in the circumferential direction and serve as a radial guide for the valve ball 38.
  • the webs 72 protrude freely from a sealing portion 68 comprising the sealing portion in the axial direction, that is, for example, not surrounded by a common collar or the like, which would possibly create a bottleneck for the hydraulic flow.
  • a first plurality of recesses 73 are present radially between the webs 72, which form first flow paths 74 and an opening 75 leading radially from the interior of the guide section 70.
  • the guide section 70 is designed to be radially symmetrical in accordance with the first plurality of webs 72.
  • an inner diameter of the housing 12 is made larger than in a in the FIG. 2 left area, so that there is a particularly large hydraulic cross section in the area of the openings 75.
  • the stopper body 60 has radially on its outer side, ie outside of the recess 62 on a second plurality of recesses 76, which are arranged distributed uniformly in the circumferential direction and form second flow paths 78. In an axial region of the second flow paths 78, the stop body 60 is designed to be radially symmetrical in accordance with the second plurality of the recesses 76. In the present case, the first plurality and the second plurality are different and are three and five, respectively, compare the following Figures 3 and 4 ,
  • valve body 58 and the stopper body 60 are arranged axially spaced apart from one another by a small amount (not numbered).
  • the valve body 58 and the stopper body 60 are arranged without spacing axially to each other.
  • the stopper body 60 and / or the valve body 58 are frictionally arranged in the housing 12 by a radially outer Surface of the stopper body 60 and the valve body 58 is pressed on a radially inner wall portion of the housing 12, for example. It is understood that for the arrangement of the stopper body 60 and / or the valve body 58 in the housing 12, other techniques other than pressing in accordance with the invention are possible.
  • valve ball 38 is made of a steel material.
  • the stopper body 60 and the valve body 58 are herein made by a method of metal powder injection molding, MIM. Alternatively, the stopper body 60 may be made by stamping and deep drawing.
  • the exhaust valve 32 is sized so that in an open state of the exhaust valve 32, a resulting hydraulic cross-sectional area is sufficiently large to supply a required amount of fuel with a comparatively small hydraulic flow resistance.
  • the valve ball 38 can lift off from the sealing seat 68 in the drawing to the right.
  • the exhaust valve 32 is thus open.
  • valve ball 38 can be pressed in the drawing to the right as far as the stop portion 66. This results in a "travel limit" for the valve ball 38.
  • a dashed circle 80 indicates the position of the valve ball 38 in this extreme case. It can be seen that the valve body 58 and the stopper body 60 allow a radial guidance of the valve ball 38, see also the following Figures 3 and 4 ,
  • An arrow 82 illustrates a resulting flow of the fuel when the exhaust valve 32 is opened.
  • the flow takes place in the drawing from left to right through the opening 34, then past the valve ball 38, then partially first through the openings 75 radially outwardly and partially directly through the first flow paths 74 in the valve body 58, then through the second flow paths 78 in the stopper body 60, then in the high pressure line 28 and to the high-pressure accumulator, not shown.
  • the freely projecting webs 72 formed on the valve body 58 a particularly large hydraulic cross-section is made possible when the outlet valve 32 is open.
  • FIG. 3 shows a perspective view of the exhaust valve 32nd
  • FIG. 4 shows one to the FIG. 3 similar view of the valve body 58 alone. It can be seen that the valve body 58 is radially symmetrical in a region of the guide section 70 and in the present case comprises three axially projecting webs 72 and correspondingly three first flow paths 74 and three openings 75. In the FIG. 4 is good to see that the webs 72 have a circular sector-like cross-section.
  • valve body 58 in the region of the guide portion 70 has a smaller outer diameter than in the region of the sealing seat 68 comprehensive sealing portion.
  • the webs 72 can also be flowed around radially on the outside of the fuel, whereby an improved hydraulic cross-section can result when the outlet valve 32 is open.
  • the guide section 70 can be decoupled from a radially outer region of the valve body 58, on which the valve body 58 in the housing 12 is arranged, in particular pressed in.
  • the stopper body 60 is likewise embodied radially symmetrically in a region of the recesses 76 and, in the present case, comprises five second flow paths 78, wherein, for reasons of clarity, only one is provided with a reference numeral.
  • the cross-sectional areas of the second flow paths 78 are selected such that at least one of the second flow paths 78 is independent of the radial orientation of the stop body 60 relative to the valve body 58 at least partially overlaps one of the first flow paths 74.
  • a radial "interference" between the three first and the five second flow paths 74 and 78 is different, so to speak.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (9)

  1. Pompe à carburant à haute pression (10), comprenant une soupape d'évacuation (32) pourvue d'une bille (38) et d'un corps (58), qui présente une partie d'étanchéité sur laquelle se trouve un siège d'étanchéité (68), et qui présente une partie de guidage (70), dans laquelle la bille (38) est guidée, caractérisée en ce que la partie de guidage (70) comprend une première pluralité de nervures saillantes axialement (72), entre lesquelles des premiers chemins d'écoulement (74) sont formés, dans laquelle il se trouve une ouverture radialement vers l'extérieur (75) au moins entre deux des nervures voisines (72) et en ce que la soupape d'évacuation (32) présente un corps de butée (60) pour la bille (38) avec une partie de butée (66), qui limite la course d'ouverture de la bille (38), dans laquelle le corps de butée (60) présente une deuxième pluralité d'évidements radiaux (76), qui sont répartis uniformément en direction périphérique et qui forment des deuxièmes chemins d'écoulement (78), dans laquelle la deuxième pluralité des deuxièmes chemins d'écoulement (78) est choisie de telle manière qu'au moins un deuxième chemin d'écoulement (78) recouvre au moins partiellement un premier chemin d'écoulement (74), indépendamment de l'orientation radiale du corps de butée (60).
  2. Pompe à carburant à haute pression (10) selon la revendication 1, caractérisée en ce que les nervures (72) sont formées par des nervures (72) partant librement de la partie d'étanchéité.
  3. Pompe à carburant à haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que les nervures (72) présentent une section transversale en forme de secteur d'anneau circulaire.
  4. Pompe à carburant à haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps (58) présente dans la région de la partie de guidage (70) un plus petit diamètre extérieur que dans la région de la partie d'étanchéité.
  5. Pompe à carburant à haute pression (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un ressort de soupape (40) prend appui sur le corps de butée (60).
  6. Pompe à carburant à haute pression (10) selon la revendication 5, caractérisée en ce que le ressort de soupape (40) est formé par un ressort hélicoïdal et il présente dans une direction axiale des diamètres différents, en particulier il est cintré.
  7. Pompe à carburant à haute pression (10) selon au moins une des revendications précédentes, caractérisée en ce que le corps de butée (60) et/ou le corps (58) sont fabriqués par un procédé de moulage par injection de poudre métallique, MIM.
  8. Pompe à carburant à haute pression (10) selon au moins une des revendications précédentes, caractérisée en ce que la première pluralité et la deuxième pluralité sont différentes.
  9. Pompe à carburant à haute pression (10) selon au moins une des revendications précédentes, caractérisée en ce que le corps de butée (60) est formé par une pièce estampée et/ou une pièce emboutie.
EP15706759.6A 2014-04-15 2015-02-20 Pompe à carburant à haute pression, comprenant une soupape d'évacuation pourvue d'une bille et d'un corps Active EP3152434B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014207194.1A DE102014207194A1 (de) 2014-04-15 2014-04-15 Kraftstoff-Hochdruckpumpe, mit einem Auslassventil mit einer Ventilkugel und einem Ventilkörper
PCT/EP2015/053562 WO2015158451A1 (fr) 2014-04-15 2015-02-20 Pompe à carburant à haute pression, comprenant une soupape d'évacuation pourvue d'une bille et d'un corps

Publications (2)

Publication Number Publication Date
EP3152434A1 EP3152434A1 (fr) 2017-04-12
EP3152434B1 true EP3152434B1 (fr) 2019-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15706759.6A Active EP3152434B1 (fr) 2014-04-15 2015-02-20 Pompe à carburant à haute pression, comprenant une soupape d'évacuation pourvue d'une bille et d'un corps

Country Status (4)

Country Link
US (1) US10167834B2 (fr)
EP (1) EP3152434B1 (fr)
DE (1) DE102014207194A1 (fr)
WO (1) WO2015158451A1 (fr)

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Publication number Priority date Publication date Assignee Title
US11248573B2 (en) * 2017-07-14 2022-02-15 Hitachi Astemo, Ltd. High-pressure fuel pump
DE102018109347B4 (de) * 2018-04-19 2021-10-21 Prominent Gmbh Selbsthaltende Druckfeder für Pumpen
DE102019217684A1 (de) 2019-11-18 2021-05-20 Robert Bosch Gmbh Kraftstoff-Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine
DE112020005427T5 (de) * 2020-01-07 2022-08-25 Hitachi Astemo, Ltd. Auslassventilmechanismus und Hochdruck-Kraftstoffzufuhrpumpe, die ihn enthält
CN114132181A (zh) * 2020-09-03 2022-03-04 长城汽车股份有限公司 车辆控制方法和装置、介质、设备

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GB444346A (en) * 1934-12-05 1936-03-19 Paul Belyavin Improvements in fuel injection pumps
US4393855A (en) * 1980-12-11 1983-07-19 Andre Mandar Correcting device for the combustion of engines of vehicles during transitional phases of operation
JPH11200990A (ja) * 1998-01-07 1999-07-27 Unisia Jecs Corp 燃料噴射制御装置
US6247455B1 (en) * 1998-10-08 2001-06-19 Toyota Jidosha Kabushiki Kaisha Injection quantity control apparatus provided to internal combustion engine
EP1477665B1 (fr) * 1999-02-09 2008-04-23 Hitachi, Ltd. Pompe d'alimentation en combustible à haute pression pour moteur à combustion interne
DE10355030A1 (de) * 2003-11-25 2005-06-23 Robert Bosch Gmbh Ventil, insbesondere für eine Hochdruckpumpe einer Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
JP2007162677A (ja) * 2005-11-21 2007-06-28 Denso Corp 高圧燃料ポンプ
JP5039507B2 (ja) * 2007-10-31 2012-10-03 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプおよびその製造方法
DE102011002826A1 (de) * 2011-01-18 2012-07-19 Schaeffler Technologies Gmbh & Co. Kg Ventileinheit für eine Kraftstoffpumpe
JP5472751B2 (ja) 2011-03-30 2014-04-16 株式会社デンソー 高圧ポンプ
JP5790466B2 (ja) * 2011-12-08 2015-10-07 トヨタ自動車株式会社 ハイブリッド車両の制御装置
EP2647827B1 (fr) * 2012-04-05 2015-06-10 Delphi International Operations Luxembourg S.à r.l. Ensemble de soupape non-retour
DE102012017953A1 (de) * 2012-09-12 2014-03-27 Iwis Motorsysteme Gmbh & Co. Kg Rückschlagventil für eine Spannvorrichtung
US9284931B2 (en) * 2013-07-24 2016-03-15 Ford Global Technologies, Llc Engine fuel pump and method for operation thereof
US9683512B2 (en) * 2014-05-23 2017-06-20 Ford Global Technologies, Llc Pressure device to reduce ticking noise during engine idling

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Also Published As

Publication number Publication date
US10167834B2 (en) 2019-01-01
US20170159629A1 (en) 2017-06-08
EP3152434A1 (fr) 2017-04-12
WO2015158451A1 (fr) 2015-10-22
DE102014207194A1 (de) 2015-10-15

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