EP0809756B1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne Download PDF

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Publication number
EP0809756B1
EP0809756B1 EP96934344A EP96934344A EP0809756B1 EP 0809756 B1 EP0809756 B1 EP 0809756B1 EP 96934344 A EP96934344 A EP 96934344A EP 96934344 A EP96934344 A EP 96934344A EP 0809756 B1 EP0809756 B1 EP 0809756B1
Authority
EP
European Patent Office
Prior art keywords
valve
spring
fuel injection
internal combustion
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.)
Expired - Lifetime
Application number
EP96934344A
Other languages
German (de)
English (en)
Other versions
EP0809756A1 (fr
Inventor
Karl Hofmann
Peter Kuegel
Ibrahim Oezyesilova
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 EP0809756A1 publication Critical patent/EP0809756A1/fr
Application granted granted Critical
Publication of EP0809756B1 publication Critical patent/EP0809756B1/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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines according to the preamble of claim 1 out.
  • Fuel injection valve is an axial valve member slidably guided in a valve body.
  • the valve member has one at its one end on the combustion chamber side Valve sealing surface with which it is used for control purposes an injection cross section with a fixed valve seat cooperates on the valve body.
  • the valve member turns on its other end distant from the combustion chamber by a valve spring acts on the valve member in contact with the Valve seat presses.
  • This valve spring is in a spring chamber inside the housing of the injection valve here in one Holding body used and supports with your End facing away from the valve member on a stationary Abutment surface.
  • the valve spring is as Coil spring formed, the one of a spring wire existing turns a circular cross-section exhibit.
  • the fuel injector according to the invention for Internal combustion engines with the characteristic features of the Claim 1 has the advantage that the Spring force of the valve spring can be increased without the required installation space of the valve spring in the housing to enlarge the injector, this advantage especially on springs with a very small inner diameter and thus small winding ratio (Dm / y up to 2.5) occurs.
  • valve spring designed according to the invention compared to alternative wire cross-sections such as rectangular, elliptical or other shaped wires have the advantage that there is no additional effort in wire production and that Valve spring is therefore lighter and lighter than these solutions is cheaper to produce.
  • Through the subsequent Grind the outside diameter of the valve spring more accurate outer diameter on the spring and thus better use of space in the specified spring space to reach. It also eliminates possible material defects on the outside diameter of the valve spring at the same time removed.
  • this optimized spring is not up the use described in a fuel injector limited, but can take place wherever despite a limited installation space, the spring force of a Return spring should be increased, e.g. for injection pumps or gas exchange valves of internal combustion engines and the like.
  • FIG. 1 shows a longitudinal section through the Fuel injection valve and Figure 2 is an enlarged Individual sectional view of the valve spring from FIG. 1.
  • a piston-shaped valve member 1 is axially displaceably guided in a bore 3 of a valve body 5, which has at its one end near the combustion chamber of the internal combustion engine a conical valve sealing surface 7, with which it a conical valve seat 9 cooperates at the inwardly projecting closed end of the bore 3.
  • the valve body 5 is axially clamped with its end remote from the combustion chamber by means of a clamping nut 11 against a valve holding body 13, an intermediate disk 15 with a central opening being clamped between the end faces of the valve body 5 and the valve holding body 13.
  • valve spring 19 has external dimensions as in FIG. 2 shown enlarged, on the radial to the spring axis X. outward-facing ends of the annular Basic cross section y of their spring turns 41 bevels 43 on, parallel to the spring axis X and to the inner wall of the cylindrical spring chamber 21 are aligned.
  • the remaining cross-sectional area is z Spring turns 41 are still 43 despite the bevels significantly larger than the cross-sectional area of a unprocessed valve spring with ring-shaped spring wire, whose outer diameter is the same size, so that the achieved Spring force of the valve spring 19 without additional space can be significantly enlarged.

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

Abstract

Cette soupape d'injection de carburant pour moteurs à combustion interne comprend un organe de soupape axialement mobile dans un corps de soupape et qui présente, à une extrémité, une surface d'étanchéité qui coopère avec un siège fixe de soupape afin d'agir sur la section transversale d'injection. Au moins un ressort de soupape (19) qui sollicite l'organe de soupape dans la direction du siège de soupape s'appuie sur une butée fixe. Afin d'augmenter la force du ressort de soupape (19) sans accroître son diamètre extérieur, les spires (41) du ressort de soupape (19) qui est un ressort hélicoïdal, ont une section transversale de base circulaire élargie (y) dont une zone dirigée radialement vers l'extérieur par rapport à l'axe (X) du ressort présente une partie polie (43) parallèle à l'axe (X) du ressort.

Claims (3)

  1. Injecteur de carburant de moteurs à combustion interne comportant une aiguille (1) coulissant axialement dans un corps d'injecteur (5), une extrémité de l'aiguille ayant une surface d'étanchéité (7) coopérant avec un siège de soupape (9), fixe pour commander la section d'éjection, et au moins un ressort d'injecteur (19), sollicitant l'aiguille (1) en direction du siège (9), et logé dans une chambre à ressort (21), ce ressort s'appuyant par son autre extrémité contre une butée fixe (23) et étant réalisé comme ressort hélicoïdal dont les spires ont une section de base circulaire (y),
    caractérisé en ce que
    le ressort d'injecteur (19) présente dans sa zone radialement extérieure par rapport à son axe (X), une partie meulée (43) alignée parallèlement à l'axe (X) du ressort pour que le diamètre extérieur (da) diminué par les parties meulées (43) du ressort (19) présente un faible jeu par rapport au diamètre intérieur de la chambre à ressort (21).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    la chambre à ressort (21) est de forme cylindrique et son diamètre intérieur est inférieur au diamètre extérieur du ressort (19) non usiné, ne comportant pas encore les parties meulées (43).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le rapport y/z du ressort (19) est situé de préférence dans la plage de 1,05 à 1,3.
EP96934344A 1995-12-16 1996-08-08 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0809756B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19547102 1995-12-16
DE19547102A DE19547102A1 (de) 1995-12-16 1995-12-16 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1996/001480 WO1997022801A1 (fr) 1995-12-16 1996-08-08 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0809756A1 EP0809756A1 (fr) 1997-12-03
EP0809756B1 true EP0809756B1 (fr) 2001-12-12

Family

ID=7780367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934344A Expired - Lifetime EP0809756B1 (fr) 1995-12-16 1996-08-08 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US5934572A (fr)
EP (1) EP0809756B1 (fr)
JP (1) JP3737124B2 (fr)
DE (2) DE19547102A1 (fr)
WO (1) WO1997022801A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19719295A1 (de) 1997-05-07 1998-11-12 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JP4016370B2 (ja) * 1999-03-29 2007-12-05 株式会社デンソー 電磁弁
DE10016425A1 (de) 2000-04-01 2001-10-04 Bosch Gmbh Robert Schraubendruckfeder zur Verwendung in einem Bauteil eines Kraftstoffeinspritzsystems
US6776401B2 (en) * 2000-04-01 2004-08-17 Robert Bosch Gmbh Helical compression spring for use in a component of a fuel injection system
US6784370B1 (en) 2003-07-21 2004-08-31 Ideal Industries, Inc. Twist-on wire connector
US20060107511A1 (en) * 2004-11-23 2006-05-25 Richard Pare Methods and apparatus for centering spring reactive forces
DE102007050819A1 (de) * 2007-10-24 2009-04-30 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil
DE102018001566A1 (de) * 2018-02-23 2019-09-26 Woodward L'orange Gmbh Dual-Fuel-Kraftstoffinjektor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB286445A (en) * 1927-02-22 1928-03-08 Henry Beaumont Taylor Improvements in or relating to internal combustion engines
US2521670A (en) * 1945-12-05 1950-09-05 Fletcher Trust Company Clutch spring
US2586646A (en) * 1946-03-29 1952-02-19 Thompson Prod Inc Joint
US2622448A (en) * 1951-06-04 1952-12-23 United States Steel Corp Apparatus for automatically centering and aligning moving objects
DE1803732A1 (de) * 1965-10-25 1969-06-04 Cohausz Dipl Ing Werner Einspritzduese
FR1512436A (fr) * 1966-12-23 1968-02-09 Réservoir de pression
DE2020678A1 (de) * 1970-04-28 1971-11-25 Daimler Benz Ag Schrauben-Druckfeder
DE3727366A1 (de) * 1987-08-17 1989-03-02 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
GB9012288D0 (en) * 1990-06-01 1990-07-18 Lucas Ind Plc Fuel injection pump

Also Published As

Publication number Publication date
US5934572A (en) 1999-08-10
JPH11501102A (ja) 1999-01-26
WO1997022801A1 (fr) 1997-06-26
DE19547102A1 (de) 1997-06-19
DE59608445D1 (de) 2002-01-24
JP3737124B2 (ja) 2006-01-18
EP0809756A1 (fr) 1997-12-03

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