EP1208296A2 - Pompe d'injection a distributeur - Google Patents

Pompe d'injection a distributeur

Info

Publication number
EP1208296A2
EP1208296A2 EP01911433A EP01911433A EP1208296A2 EP 1208296 A2 EP1208296 A2 EP 1208296A2 EP 01911433 A EP01911433 A EP 01911433A EP 01911433 A EP01911433 A EP 01911433A EP 1208296 A2 EP1208296 A2 EP 1208296A2
Authority
EP
European Patent Office
Prior art keywords
injection pump
support element
roller
housing
bolt
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
EP01911433A
Other languages
German (de)
English (en)
Other versions
EP1208296B1 (fr
Inventor
Rolf-Juergen Giersch
Rolf Pojar
Joerg-Peter Fischer
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 EP1208296A2 publication Critical patent/EP1208296A2/fr
Application granted granted Critical
Publication of EP1208296B1 publication Critical patent/EP1208296B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/121—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor with piston arranged axially to driving shaft

Definitions

  • the invention relates to a distributor injection pump with a housing and a roller ring which is adjustably arranged in the housing and which is provided with at least one roller on which a cam disk can be supported, which serves to actuate a pump piston, the roller in the roller ring using a Bolt is mounted, which extends in the radial direction relative to the central axis of the roller ring.
  • Such a distributor injection pump serves to supply a cylinder of an internal combustion engine with the right amount of fuel at the right time.
  • the pump piston is provided, which is connected to the cam disk.
  • the cam disc When the cam disc is rotated relative to the Rolienring, its cam surface rolls on the rollers. In this way, the cam disc experiences a stroke movement that is transmitted to the pump piston.
  • the forces acting on the bolt during a stroke result in a periodic force component acting on the bolt, which acts on the bolt with respect to the central axis of the roller ring in the radial direction to the outside.
  • the invention is therefore based on the object of further developing a distributor injection pump of the type mentioned at the outset in such a way that the bolts of the roller ring are reliably prevented from being buried in the housing of the distribution injection pump
  • the support element serves to introduce the axial force acting on the bolt over a large area into the housing of the distributor injection pump.
  • the support element is a clamp arranged on the roller ring, which is clipped into openings on the roller ring.
  • the clamp covers the radially outer end of the bolt and, when an axial force is exerted on the bolt, deformed towards the outside of the distributor injection pump housing so that it rests on the housing and introduces the axial force acting on the bolt over a large area into the housing.
  • Steel is preferably chosen as the material for the clamp
  • the support element is arranged on the housing.
  • the support element which is preferably made of steel, is designed as an insert which prevents direct contact between the steel bolt and the aluminum housing this out
  • an axial force acting on the bolt is first applied to the support element of the transformer, from which it is again introduced into the housing over a large area.
  • FIG. 1 shows a schematic sectional view of part of a distributor injection pump according to the invention
  • Figure 2 is a perspective view of part of a roller ring used in the distributor injection pump of Figure 2; and FIG. 3 in a further perspective view a part of the roller ring.
  • FIG. 1 shows a schematic partial section of a distributor injection pump according to the invention, which serves to inject fuel into a cylinder of an internal combustion engine.
  • the injection pump contains a housing 10 in which a roller ring 12 is arranged.
  • the roller ring 12 has an inner ring 14 and an outer ring 16, which form an annular receptacle 18 between them.
  • a plurality of rollers 20 are arranged within the annular receptacle 18, each of which is mounted on a pin 24 via a bushing 22.
  • Each bolt 24 extends with respect to a central axis of the roller ring 12 in the radial direction and is with its radially inner lying end received in the inner ring 14, while its radially outer end is received in the outer ring 16.
  • a thrust washer 26 is also arranged between the outer ring 16 and each roller 20.
  • a cam disk 28 interacts with the rollers 20 and is acted upon by a compression spring 30 against the rollers 20.
  • An extension 32 is connected to the cam disk 28, which in turn is connected to a pump piston (not shown).
  • a drive shaft 36 is provided which can set the cam disk 28 in rotation via a clutch 38.
  • the cam disc 28 then runs with its cam-facing surface on the rollers 20, which results in a periodic lifting movement of the cam disc 28, which is transmitted to the pump piston, which finally conveys the fuel to be injected.
  • a spray adjuster (not shown) is also provided, by means of which the roller ring 12 can be rotated in the housing by a certain angle.
  • the structure and mode of operation of such a spray adjuster are generally known, so that they are not reproduced here.
  • a support element 40 (see also FIGS. 2 and 3) is attached to the roller ring 12 and is provided with two bent ends 42, which serve as spring tabs. Each bent end engages in an opening 44 which is formed on the outer ring 16 of the roller ring 12.
  • the support element 40 extends over an angular range which is very much larger than the angular range over which the radially outer end of the corresponding bolt 24 extends, and essentially covers the radially outer end of the corresponding bolt.
  • each support element 40 protrudes beyond the outer circumference of the outer ring 16, each support element is arranged in a recess 46 which extends between two openings 44 assigned to the same support element 40
  • Steel in particular can be used as the material for the support member 40.
  • a suitable plastic is also conceivable.
  • the use of a single support element for all bolts is also conceivable of the support element shown made of flat material, for example, a wire clip can be used, which either surrounds the entire outer ring 16 and is arranged in the region of the axially outer ends of the bolts 24 or is clipped separately into the openings 44

Landscapes

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

Abstract

Pompe d'injection à distributeur qui comporte un carter (10) et une bague (12) à rouleaux placée mobile dans le carter et dotée d'au moins un rouleau (20) sur lequel peut s'appuyer un disque distributeur (28) servant à actionner un piston de pompe. Le rouleau est placé dans la bague à rouleaux à l'aide d'une cheville (24) qui s'étend dans le sens radial par rapport à l'axe médian de la bague à rouleaux. Selon la présente invention, un élément d'appui (40) est placé sur l'extrémité radiale externe de la cheville (24), ce qui empêche la détérioration du carter par la force s'exerçant radialement vers l'extérieur sur la cheville en cas de charge sur le rouleau.
EP01911433A 2000-02-15 2001-02-08 Pompe d'injection a distributeur Expired - Lifetime EP1208296B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10006558 2000-02-15
DE10006558A DE10006558A1 (de) 2000-02-15 2000-02-15 Verteilereinspritzpumpe
PCT/DE2001/000471 WO2001061179A2 (fr) 2000-02-15 2001-02-08 Pompe d'injection a distributeur

Publications (2)

Publication Number Publication Date
EP1208296A2 true EP1208296A2 (fr) 2002-05-29
EP1208296B1 EP1208296B1 (fr) 2005-12-21

Family

ID=7630892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911433A Expired - Lifetime EP1208296B1 (fr) 2000-02-15 2001-02-08 Pompe d'injection a distributeur

Country Status (8)

Country Link
EP (1) EP1208296B1 (fr)
JP (1) JP4612264B2 (fr)
CN (1) CN1184415C (fr)
BR (1) BR0104484B1 (fr)
DE (2) DE10006558A1 (fr)
PL (1) PL350829A1 (fr)
RU (1) RU2267639C2 (fr)
WO (1) WO2001061179A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006028348B3 (de) 2006-06-20 2007-10-31 Siemens Ag Rollenlagerungsvorrichtung
EP2853696B1 (fr) 2013-09-27 2017-03-01 Aktiebolaget SKF Système mécanique, pompe à injection et actionneur de soupape comportant un tel système mécanique et procédé de fabrication

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935678U (ja) * 1982-08-31 1984-03-06 マツダ株式会社 デイ−ゼルエンジンの燃料噴射ポンプ
DE3331725C2 (de) * 1983-09-02 1995-01-26 Bosch Gmbh Robert Stirnnockenantrieb insbesondere für Kraftstoffeinspritzpumpen
JPH1054321A (ja) * 1996-08-08 1998-02-24 Toyota Motor Corp 燃料噴射ポンプのローラブッシュ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0161179A2 *

Also Published As

Publication number Publication date
WO2001061179A3 (fr) 2002-03-07
CN1184415C (zh) 2005-01-12
JP2003522903A (ja) 2003-07-29
CN1364220A (zh) 2002-08-14
PL350829A1 (en) 2003-02-10
JP4612264B2 (ja) 2011-01-12
BR0104484B1 (pt) 2009-08-11
DE10006558A1 (de) 2001-08-30
DE50108447D1 (de) 2006-01-26
BR0104484A (pt) 2002-01-08
EP1208296B1 (fr) 2005-12-21
WO2001061179A2 (fr) 2001-08-23
RU2267639C2 (ru) 2006-01-10

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