EP0369151B1 - Pompe d'injection combinée avec l'injecteur et dispositif de fixation - Google Patents

Pompe d'injection combinée avec l'injecteur et dispositif de fixation Download PDF

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Publication number
EP0369151B1
EP0369151B1 EP89118437A EP89118437A EP0369151B1 EP 0369151 B1 EP0369151 B1 EP 0369151B1 EP 89118437 A EP89118437 A EP 89118437A EP 89118437 A EP89118437 A EP 89118437A EP 0369151 B1 EP0369151 B1 EP 0369151B1
Authority
EP
European Patent Office
Prior art keywords
pump
clamping
housing
cylinder head
head
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.)
Expired - Lifetime
Application number
EP89118437A
Other languages
German (de)
English (en)
Other versions
EP0369151A1 (fr
Inventor
Heinz Rathmayr
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 AG
Original Assignee
Robert Bosch AG
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 AG filed Critical Robert Bosch AG
Priority to AT89118437T priority Critical patent/ATE87995T1/de
Publication of EP0369151A1 publication Critical patent/EP0369151A1/fr
Application granted granted Critical
Publication of EP0369151B1 publication Critical patent/EP0369151B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the present invention relates to an arrangement for fastening a series of pump nozzles to the cylinder head of an internal combustion engine, in which each pump nozzle has a pump housing which is pressed into a stepped bore of a cylinder head by means of clamping screws, and a head housing containing actuators which is sealingly connected to the pump housing and has projections on two opposite sides.
  • the invention relates to high-pressure injection nozzles with electrically or hydraulically actuated actuators for quantity and / or spray adjustment, which are enclosed in a pressure-tight manner by a head housing and their fastening.
  • the position of the holes in the flange must be specified for each engine type according to the specific circumstances, whereby a variety of different designs of a pump nozzle must be kept in stock and many holes must be machined in the cylinder head, which weaken the structure.
  • EP-A-0 057 674 discloses the attachment of a fuel injection pump to the cylinder head of an internal combustion engine, in which each pump nozzle has a pump housing which is pressed sealingly into a stepped bore of a cylinder head by means of tensioning screws, and a head housing containing actuators which is sealingly connected to the pump housing (in one piece in the present case) and has projections on two opposite sides.
  • the solution according to the invention ensures indirect fastening of a whole series of pump nozzles, this type of fastening leaving sufficient scope to be able to use a single type of pump nozzle for a large number of motor types.
  • This advantage which affects the installation and removal of the pump nozzles, is further supplemented by the fact that the connection between the pump nozzle and the cylinder head is so elastic that deformations and breaks are largely avoided.
  • the end parts of the clamping bracket are preferably spherical and a spherical support for the attack of the clamping screw is arranged in the middle of the clamping bracket.
  • FIG. 1 shows a longitudinal section through the cylinder head wall
  • FIG. 2 shows a greatly simplified plan view of FIG. 1
  • FIG. 3 shows an arrangement of the same components with a larger cylinder spacing.
  • a pump nozzle (2) in section and a pump nozzle (3) are shown in view in a cylinder head wall (1). Both are driven by a camshaft, not shown, via thrust pieces (4) from the engine.
  • the pump nozzles (2, 3) are surrounded by a pump housing (5) which is inserted in a stepped bore (6) in the cylinder head wall (1). Seals and fuel supply and discharge to and from the pump nozzle are not shown for the sake of simplicity.
  • the pump housing (5) contains a pump piston liner (7) in which a piston (8) works.
  • the pump housing (5) is sealed off at the top by a head housing (13) which contains an electromagnetic drive (14) for the actuator (15) which, for example, causes the pump piston (8) to rotate.
  • the inside of the pump housing (5) and head housing (13) is completely filled with fuel.
  • the working movement of the guide sleeve (9) prevails in the annular space (10) a pulsating pressure that can reach 25 bar. This propagates through the electromagnetic drive (14) into the head space (12). This creates a pulsating force there that tries to lift the head housing (13) from the pump housing (5).
  • the head housing (13) has projections (20) on opposite sides with horizontal engagement surfaces (21) for the clamping bracket (22).
  • the clamping bracket (22) have spherical end parts (23) which rest on the contact surfaces (21).
  • a expansion screw (24) engages via a spherical washer (26), which ensures that the pump nozzle (2, 3) is clamped down on the cylinder head wall (1).
  • Fig. 2 it can be seen that the clamping bracket (22) are inclined at an angle (25) with respect to the direction of the motor axis (27). Where the clamping brackets (22) engage on the attack surface (21) is not critical. This makes it possible to use identical pump nozzles (2, 3) and clamping brackets (22) according to FIG. 3 even with a larger cylinder spacing (28), a different angle (25) resulting which can also be 0 °. With even larger cylinder distances, longer clamping brackets (22) can of course also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Nozzles (AREA)
  • Fertilizing (AREA)

Claims (2)

  1. Agencement de fixation d'une série de gicleurs de pompe (2, 3) sur la tête de cylindre d'un moteur à combustion interne dans lequel chaque gicleur (2, 3) comporte un carter de pompe (5), qui est pressé de manière étanche dans un alésage étagé (6) d'une tête de cylindre via des vis de serrage (24), et un boîtier de tête (13) contenant des organes de réglage qui est relié de manière étanche au carter de pompe (5) et présente des saillies (20) sur deux côtés en regard, caractérisé en ce que l'on applique uniquement sur les saillies (20) tournées l'une vers l'autre de deux gicleurs voisins (2, 3), respectivement, une partie terminale (23) d'un étrier de serrage commun (22), qui est tiré vers le bas par une vis de serrage (24) et chaque étrier de serrage (22) fait un angle (25) avec la direction de l'axe longitudinal (27) du moteur.
  2. Agencement selon la revendication 1, caractérisé en ce que les parties terminales (23) des étriers de serrage (22) sont convexes et un appui sphérique (26) est agencé au centre des étriers de serrage (22) pour recevoir la vis de serrage (24).
EP89118437A 1988-11-14 1989-10-04 Pompe d'injection combinée avec l'injecteur et dispositif de fixation Expired - Lifetime EP0369151B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118437T ATE87995T1 (de) 1988-11-14 1989-10-04 Pumpduese und befestigungsvorrichtung dafuer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8814249U 1988-11-14
DE8814249U DE8814249U1 (de) 1988-11-14 1988-11-14 Pumpedüse und Befestigungsvorrichtung dafür

Publications (2)

Publication Number Publication Date
EP0369151A1 EP0369151A1 (fr) 1990-05-23
EP0369151B1 true EP0369151B1 (fr) 1993-04-07

Family

ID=6829869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118437A Expired - Lifetime EP0369151B1 (fr) 1988-11-14 1989-10-04 Pompe d'injection combinée avec l'injecteur et dispositif de fixation

Country Status (3)

Country Link
EP (1) EP0369151B1 (fr)
AT (1) ATE87995T1 (fr)
DE (2) DE8814249U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222081C2 (de) * 1992-07-04 2003-09-04 Deutz Ag Dieselbrennkraftmaschine
US5697345A (en) * 1994-12-28 1997-12-16 Cummins Engine Company, Inc. Clamping load distributor for a fuel injector
US5706786A (en) * 1994-12-28 1998-01-13 Cummins Engine Company, Inc. Distortion reducing load ring for a fuel injector
EP2466115B1 (fr) * 2010-12-15 2015-07-08 FPT Industrial S.p.A. Système de fixation d'un injecteur sur la culasse de moteur d'un véhicule, procédé de fixation de l'injecteur et procédé de fabrication du système

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4290394A (en) * 1980-03-07 1981-09-22 Brunswick Corporation Two-cycle engine with fuel injection
AT372502B (de) * 1981-02-02 1983-10-25 Friedmann & Maier Ag Kraftstoffeinspritzpumpe fuer brennkraftmaschinen, insbesondere dieselmotoren

Also Published As

Publication number Publication date
EP0369151A1 (fr) 1990-05-23
DE58904013D1 (de) 1993-05-13
ATE87995T1 (de) 1993-04-15
DE8814249U1 (de) 1989-01-19

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