EP3152434A1 - 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

Info

Publication number
EP3152434A1
EP3152434A1 EP15706759.6A EP15706759A EP3152434A1 EP 3152434 A1 EP3152434 A1 EP 3152434A1 EP 15706759 A EP15706759 A EP 15706759A EP 3152434 A1 EP3152434 A1 EP 3152434A1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel pump
pressure fuel
webs
valve ball
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.)
Granted
Application number
EP15706759.6A
Other languages
German (de)
English (en)
Other versions
EP3152434B1 (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
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
Publication of EP3152434A1 publication Critical patent/EP3152434A1/fr
Application granted granted Critical
Publication of EP3152434B1 publication Critical patent/EP3152434B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 one
  • Fuel system for an internal combustion engine are known from the market. Often, such high-pressure fuel pumps include an intake valve and an exhaust valve, which depend on a controller and / or in
  • the exhaust valve can open.
  • the problem underlying the invention is achieved by a high-pressure fuel pump according to claim 1.
  • Advantageous developments are specified in subclaims. Features which are important for the invention can also be found in the following description and in the drawings, wherein the features, both alone and in different combinations, can be important for the invention, without being explicitly referred to again.
  • 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. This can be done when open
  • Outlet valve a region radially outside the webs of fuel to be flowed through, whereby a hydraulic cross section can be increased and the delivery capacity 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 in one
  • the outlet valve has a stop body for the valve ball with a
  • Stopper portion which limits the opening stroke of the valve ball, wherein the stopper body has a second plurality of radial recesses which are arranged distributed uniformly in the circumferential direction and second
  • Flow path at least partially overlaps a first flow path.
  • valve body and the stopper body can be independent of a radial angle of these elements to each other and thus simplified and cheapened.
  • Valve ball acted upon by an axial force against the sealing seat, supported on the stopper 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. This allows the function of the valve spring,
  • valve spring when the valve spring is received radially inside the stopper body to 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 produced by a method of metal powder injection molding, MI M.
  • MI M metal powder injection molding
  • the outlet valve can be produced in a particularly simple and cost-effective manner.
  • the first plurality and the second plurality are different.
  • Opening cross-section is substantially independent of a radial angle between the guide portion and the stopper body.
  • the stopper body can be designed as a stamped part and / or deep-drawn part. This can save weight and reduce manufacturing costs.
  • Figure 1 is a simplified diagram of a high-pressure fuel pump for an internal combustion engine in a sectional view
  • FIG. 2 shows a longitudinal section through an outlet valve of the high-pressure fuel pump of FIG. 1;
  • Figure 3 is a perspective view of a valve body and a
  • Stop body of the exhaust valve similar to Figure 2, together with a valve ball and a valve spring;
  • FIG. 4 is a perspective view of the valve body of FIG. 3.
  • FIG. 1 shows a simplified diagram of a high-pressure fuel pump 10 in an axial sectional illustration.
  • the high-pressure fuel pump 10 is a 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 portion in the drawing, an electromagnet 14 with a magnetic coil 16, an armature 18 and a
  • Anchor spring 20 is arranged.
  • the high pressure fuel pump 10 includes one with a
  • Low pressure line 22 connected to inlet 24 with an inlet valve 26, and one connected to a high pressure line 28 outlet 30 with a
  • Exhaust valve 32 A connected to the high pressure line 28
  • High-pressure accumulator (“rail") 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 is shown only very schematically in Figure 1. Further down in Figures 2, 3 and 4, the exhaust valve 32 will 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 horizontal by means of a in the drawing
  • valve needle 46 moves in Figure 1 to the left, and so the inlet valve 26 by the force of the
  • Valve spring 42 are closed. If the solenoid 14 is not energized, the inlet valve 26 can through the
  • 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 connected via an opening 56 with the
  • Delivery chamber 36 hydraulically connected.
  • 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 differential between the delivery chamber 36 and the outlet 30 and the high pressure line 28, respectively.
  • the inlet valve 26 is at Full delivery of a respective pressure difference between the inlet 24 and the delivery chamber 36 is acted upon at General Cincinnati but also through the valve needle 46 and the solenoid 14.
  • Figure 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 is. In principle, however, it is also conceivable that 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 40.
  • 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. In this case, the valve spring 40 is supported on a floor (right in the drawing, without
  • the 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 centric opening 64, which has a smaller diameter than the valve spring 40.
  • the valve spring 40 in an axial direction (continuous) on different diameters and is designed here waisted.
  • Stop body 60 forms an annular stop portion 66 for the valve ball 38. Thus, the stop body 60 limited by 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 comprises a first plurality of axially projecting webs
  • the webs 72 protrude freely from the sealing seat 68 comprising a 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.
  • first flow paths 74 In an axial region of the first flow paths 74 is the
  • Guide portion 70 corresponding to the first plurality of webs 72 executed radially symmetrically.
  • an inner diameter of the housing 12 is made larger than in a left in Figure 2 area, so that there is a particularly large hydraulic cross-section in the region of the openings 75.
  • the stopper body 60 has radially on its outer side, that is outside of the recess 62 on a second plurality of recesses 76 which are arranged distributed uniformly in the circumferential direction and second
  • Recesses 76 executed radially symmetrically.
  • the first plurality and the second plurality are different and amount to three
  • valve body 58 and the stopper body 60 are arranged axially spaced by a small amount (without reference numeral)
  • 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 against 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.
  • the valve ball 38 is made of one
  • 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 by means of punching and
  • 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 deliver a required amount of fuel with a comparatively small hydraulic flow resistance.
  • a fuel pressure in the delivery chamber 36 and in a region of the opening 34 is smaller than a
  • Valve spring 40 the valve ball 38 in the drawing to the left against the
  • 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
  • valve ball 38 For the valve ball 38.
  • a dashed line 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 FIGS. 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 free-projecting webs 72 formed on the valve body 58 a particularly large hydraulic cross-section is made possible with the outlet valve 32 open.
  • FIG. 3 shows a perspective view of the outlet valve 32.
  • FIG. 4 shows a view, similar to FIG. 3, 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.
  • the webs 72 have a circular sector-like cross-section.
  • Guide portion 70 has a smaller outer diameter than in the region of the sealing seat 68 comprehensive sealing portion. As a result, 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. In addition, the guide portion 70 can because of the smaller
  • the stopper body 60 is likewise designed to be radially symmetrical 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, regardless of the radial orientation of the stop body 60 relative to the valve body 58, at least one of the second flow paths 78 at least partially overlaps one of the first flow paths 74.
  • the first plurality and the second plurality are different, so to speak, there is a radial "interference" between the first three and the five second flow paths 74 and 78. This results in a total resulting hydraulic opening cross-section of the exhaust valve 32 is substantially independent of a random radial mounting angle between the guide portion 70 and the stopper body 60.

Landscapes

  • 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)

Abstract

L'invention concerne une 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 section d'étanchéité sur laquelle un siège d'étanchéité (68) est présent, et qui comprend une section de guidage (70) dans laquelle est guidée la bille (38) de la soupape. Selon l'invention, la section de guidage (70) comprend une première pluralité d'éléments jointifs (72) faisant saillie axialement, entre lesquels sont formées des premières voies d'écoulement (74), un orifice (75) étant présent radialement à l'extérieur au moins entre deux éléments jointifs (72) voisins parmi les éléments jointifs.
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 true EP3152434A1 (fr) 2017-04-12
EP3152434B1 EP3152434B1 (fr) 2019-10-16

Family

ID=52595307

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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
WO2021140829A1 (fr) * 2020-01-07 2021-07-15 日立Astemo株式会社 Mécanisme de soupape d'éjection et pompe d'alimentation en carburant haute-pression pourvue de celui-ci
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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Publication number Priority date Publication date Assignee Title
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
HUE025046T2 (en) * 2012-04-05 2016-01-28 Delphi Int Operations Luxembourg Sarl valve Assembly
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

Also Published As

Publication number Publication date
EP3152434B1 (fr) 2019-10-16
WO2015158451A1 (fr) 2015-10-22
US20170159629A1 (en) 2017-06-08
DE102014207194A1 (de) 2015-10-15
US10167834B2 (en) 2019-01-01

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