EP3173613B1 - Kraftstoffpumpe - Google Patents

Kraftstoffpumpe Download PDF

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Publication number
EP3173613B1
EP3173613B1 EP16198727.6A EP16198727A EP3173613B1 EP 3173613 B1 EP3173613 B1 EP 3173613B1 EP 16198727 A EP16198727 A EP 16198727A EP 3173613 B1 EP3173613 B1 EP 3173613B1
Authority
EP
European Patent Office
Prior art keywords
plunger
cam
contact
compensating
drive arrangement
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
EP16198727.6A
Other languages
English (en)
French (fr)
Other versions
EP3173613A1 (de
Inventor
Christopher Mccrindle
Paul Buckley
Kartik Rajaram
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.)
Delphi Technologies IP Ltd
Original Assignee
Delphi Technologies IP Ltd
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 Delphi Technologies IP Ltd filed Critical Delphi Technologies IP Ltd
Publication of EP3173613A1 publication Critical patent/EP3173613A1/de
Application granted granted Critical
Publication of EP3173613B1 publication Critical patent/EP3173613B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets

Definitions

  • Said compensating plunger may be adapted to reciprocate along said bore along a second axis which is substantially perpendicular to said first axis
  • the cross sectional area or diameter of the shaft/stem of the pumping plunger may be substantially equal to that of the cross-sectional area of the compensating plunger.
  • FIG. 2 shows a simple embodiment according to one aspect.
  • a bore 4 is provided in the cam box wall, in the example this is perpendicular to the axis of the plunger.
  • a compensating plunger 5 which may be urged towards the cambox volume by spring means 6, such that it is in contact with, and driven by, the cam.
  • the point of contact of one end of the compensating plunger on the cam is at a location on the cam which is out of phase with the point of contact of pump plunder (or rider thereof) with the cam. This is to say when the pump plunger moves away i.e. out of the cambox the compensating plunger moves in a direction into the cambox, and vice versa.
  • the term "out of phase" may be considered as such.
  • Figure 3 shows a plot of cambox pressure against cam displacement for a prior art design 10 and a design one according to one example of the invention 11; the figure thus shows un-compensated and compensated plots. As can be seen there is an improvement in designs according to aspects of the invention by reducition of cambox pressure peaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)

Claims (10)

  1. Antriebsanordnung für eine kolbenbetätigte Kraftstoffpumpe mit einem einzelnen Pumpenkolben (1), wobei der Kolben (1) ausgebildet ist, sich entlang einer ersten Achse hin- und herzubewegen, und von einem rotierenden Nocken (2) angetrieben wird, der mit einem Ende des Kolbens (1) in Kontakt ist, und wobei sich der Nocken (2) und das Kontaktende des Kolbens (1) in einem Nockenboxgehäuse befinden, wobei das Gehäuse eine Bohrung (4) umfasst, in der sich ein kompensierender Kolben (5) befindet, dessen eines Ende ausgebildet ist, den Nocken (2) zu kontaktieren derart, dass der Nocken (2) eine Hin- und Herbewegung für den kompensierenden Kolben (5) vorsieht derart, dass in einer beliebigen Nockenposition das effektive Volumen der Nockenbox (3) im Wesentlichen konstant ist.
  2. Eine Antriebsanordnung gemäß Anspruch 1, die derart angeordnet ist, dass der Pumpenkolben (1) ausgebildet ist, sich phasenverschoben zu dem kompensierenden Kolben (5) hin und her zu bewegen.
  3. Eine Antriebsanordnung gemäß Anspruch 1 oder 2, wobei das Kontaktende des Pumpenkolbens (1) mit dem Nocken (2) in Kontakt ist an einem Punkt, der zu dem Punkt auf dem Nocken phasenverschoben ist, an dem das Kontaktende des kompensierenden Kolbens (5) den Nocken kontaktiert.
  4. Eine Antriebsanordnung gemäß Anspruch 3, wobei das Ende des Pumpenkolbens (1) den Nocken an einem Punkt kontaktiert, der in der Phase entgegengesetzt ist zu dem Punkt auf dem Nocken, an dem das Kontaktende des kompensierenden Kolbens (5) den Nocken kontaktiert.
  5. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 4, wobei der kompensierende Kolben (5) ausgebildet ist, sich entlang der Bohrung (4) entlang einer zweiten Achse hin und her zu bewegen, die im Wesentlichen senkrecht zu der ersten Achse ist.
  6. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 5, die derart ausgebildet ist, dass, wenn das Kontaktende des Pumpenkolbens (1) in Kontakt mit einem Punkt auf dem Umfang des Nockens ist, der der Achse der Nockenrotation am nächsten ist, das Kontaktende des kompensierenden Kolbens (5) in Kontakt mit einem Punkt auf dem Nocken ist, der am weitesten von der Achse der Nockenrotation entfernt ist.
  7. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 6, wobei die Querschnittsfläche oder der Durchmesser der Welle / des Schafts des Pumpenkolbens (1) im Wesentlichen gleich zu der der Querschnittsfläche des kompensierenden Kolbens (5) ist.
  8. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 7, wobei der kompensierende Kolben (5) in eine Richtung gedrückt wird derart, dass sein Kontaktende durch Federmittel in Kontakt mit dem Nocken (2) gehalten wird.
  9. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 8, wobei die Bohrung (4) mit dem Pumpenrücklauf in Fluidverbindung ist.
  10. Eine Antriebsanordnung gemäß den Ansprüchen 1 bis 9, wobei die Bohrung ein Rückschlagventil (8) umfasst.
EP16198727.6A 2015-11-24 2016-11-14 Kraftstoffpumpe Active EP3173613B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1520698.0A GB201520698D0 (en) 2015-11-24 2015-11-24 Fuel Pump

Publications (2)

Publication Number Publication Date
EP3173613A1 EP3173613A1 (de) 2017-05-31
EP3173613B1 true EP3173613B1 (de) 2019-10-23

Family

ID=55133271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16198727.6A Active EP3173613B1 (de) 2015-11-24 2016-11-14 Kraftstoffpumpe

Country Status (2)

Country Link
EP (1) EP3173613B1 (de)
GB (1) GB201520698D0 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111098171B (zh) * 2018-10-25 2021-11-09 捷普电子(新加坡)公司 定位治具

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1433960A (en) * 1974-10-23 1976-04-28 Sigma Hranice Np Pump
JPS6397880A (ja) * 1986-10-09 1988-04-28 Mitsuwa Seiki Co Ltd 容積型ポンプ
DE10161258A1 (de) * 2001-12-13 2003-07-03 Bosch Gmbh Robert Kraftstoffhochdruckpumpe mit integrierter Sperrflügel-Vorförderpumpe
DE102004061813A1 (de) * 2004-12-22 2006-07-06 Robert Bosch Gmbh Kolbenpumpe mit wenigstens einem Kolbenelement
DE102007034036A1 (de) * 2007-07-20 2009-01-22 Robert Bosch Gmbh Kraftstoffhochdruckpumpe mit Rollenstößel
DE102011089399A1 (de) * 2011-12-21 2013-06-27 Robert Bosch Gmbh Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3173613A1 (de) 2017-05-31
GB201520698D0 (en) 2016-01-06

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