EP2007979B1 - Pompe à piston radial pour l'alimentation haute pression en carburant d'un moteur à combustion interne - Google Patents

Pompe à piston radial pour l'alimentation haute pression en carburant d'un moteur à combustion interne Download PDF

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Publication number
EP2007979B1
EP2007979B1 EP07727923A EP07727923A EP2007979B1 EP 2007979 B1 EP2007979 B1 EP 2007979B1 EP 07727923 A EP07727923 A EP 07727923A EP 07727923 A EP07727923 A EP 07727923A EP 2007979 B1 EP2007979 B1 EP 2007979B1
Authority
EP
European Patent Office
Prior art keywords
piston pump
radial piston
valve
pump according
collar
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.)
Ceased
Application number
EP07727923A
Other languages
German (de)
English (en)
Other versions
EP2007979A1 (fr
Inventor
Ngoc-Tam Vu
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies 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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of EP2007979A1 publication Critical patent/EP2007979A1/fr
Application granted granted Critical
Publication of EP2007979B1 publication Critical patent/EP2007979B1/fr
Ceased 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
    • F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0452—Distribution members, e.g. valves
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps

Definitions

  • the invention relates to a radial piston pump for high-pressure fuel supply in an internal combustion engine, having a compressor chamber arranged in a displacer housing, with reciprocating pistons arranged in a cylinder chamber, with a suction valve connected to a fuel supply line with a closing body loaded with a spring, an intermediate piece and a threaded pin and with a pressure valve connected to a fuel outlet ( DE-A-19848035 ).
  • a radial piston pump unit in which the suction valve is arranged in the transverse direction to the vertical axis of the reciprocating piston ( DE 102 28 552 B4 ).
  • This suction valve has the function to open as streamlined as possible within a very short time and then close reliably again.
  • the suction valve should be sealed and dimensionally stable with an optimal dead space volume.
  • the object of the present invention is to make the suction valve in a radial piston pump of the type mentioned so that it is streamlined, wear-resistant and dimensionally stable with optimization of the dead space volume.
  • valve mushroom designed with recesses in flat seat design is well guided centrally in the displacer unit.
  • the valve lift is simplified by the distance between the valve mushroom and the displacer unit, so that stroke adjustment is no longer required.
  • the valve can be made for example of ceramic or sintered material.
  • the valve mushroom can have three channels distributed over the circumference, which pass through the base plate.
  • the stop plate on the side facing away from the end collar have at least two radially extending, connected to the passage openings, which are in the region of the fuel supply line.
  • the suction valve may be arranged analogously to the known prior art in the transverse direction to the vertical axis of the piston and in the displacer housing.
  • valve mushroom can displaceably store in a cylinder space of the displacer housing and define with its spring-facing end face and the front side of the cylinder space of the lift of the suction valve.
  • the threaded pin with a collar adjacent the end face of the zone of the stop plate, in which the base plate and the two channels are arranged.
  • the threaded pin may have, following the region of the threads, a circumferential groove into which a ring seal is inserted. This results in a greater safety in the pump operation, because a high preload force is achieved by the threaded pin with good sealing.
  • the stop plate can be arranged between a collar in the displacer housing and the threaded pin, to which the cylinder chamber of smaller diameter connects for the valve mushroom.
  • Fig. 1 is a radial piston pump 1 for fuel high pressure supply in an internal combustion engine shown. It is particularly applicable to a common rail injection system.
  • the radial piston pump 1 has a compressor chamber 4 arranged in a displacer housing 3 and a reciprocating piston 7 arranged in a cylinder chamber 6.
  • This piston 7 can be moved accordingly, for example, by means of an eccentric drive shaft, which is not shown in detail.
  • a suction valve 10 which is connected to a fuel supply line 9.
  • This suction valve 10 may be arranged in the displacer housing 3 in the transverse direction to the vertical axis O - O of the piston 7.
  • a pressure valve 16 which is connected to a fuel outlet line 17, is arranged above the piston 7.
  • fuel is supplied from the low-pressure region to the pump piston 7. After the pressure buildup, the compressed fuel is discharged via the pressure valve 16. This fuel flows into a high pressure passage and via a high pressure line to a fuel rail, for example, a common rail system.
  • the suction valve 10 has a closing body 12, which is acted upon by a spring 11, in addition, a stop plate 22 and a threaded pin 14 is provided.
  • the closing body 12 of the suction valve 10 is designed as a valve mushroom 18, which according to FIG Fig. 2 a termination collar 19 and thereafter three circumferentially distributed channels 20, 20 ', 20 ". These channels pass through a base plate 34, which may be formed as a bearing for the spring 11.
  • the stop plate 22 abuts.
  • This stop plate 22 has on the side facing away from the end collar 19 at least two radially extending, connected to a through hole 36 channels 24 and 24 ', which are in the region of the fuel supply line 9.
  • the stop plate 22 is bounded on the back by the threaded pin 14, which after Fig. 1 has an area 28 for the threads.
  • valve mushroom 18 slidably supports in a cylinder chamber 38 of the displacer housing 3 and defines with its spring 11 facing the front side and the front of the aforementioned cylinder space the stroke H of the suction valve 10th
  • Fig. 1 is also apparent that the stop plate 22 is disposed between a collar 40 in the displacer housing 3 and the threaded pin 14, to which the cylinder space 38 smaller diameter for the valve mushroom 18 connects.
  • the suction valve 10 opens and the fuel can flow via the supply line 9, the base plate 36 and the channels 20, 20 ', 20 "of the closing body 12 into the compressor chamber 4.
  • the entire unit of the suction valve 10 is designed easy to install due to the special design, with no adjustment of the stroke and the compression spring 11 is required.
  • the dead space volume is optimized, which leads to a better pump efficiency, wherein in addition, the suction valve 10 is designed flow-favorable overall with low structural complexity.

Landscapes

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

Abstract

L'invention concerne une pompe à piston radiale (1) destinée à l'alimentation haute pression en carburant d'un moteur à combustion interne, comprenant un compartiment de compression (4) disposé dans un carter de déplaceur (3), un piston (7) animé d'un mouvement de va-et-vient et logé dans une chambre de cylindre (6), une soupape d'aspiration (10) raccordée à la conduite d'alimentation en carburant (9) et dotée d'un obturateur (12) sollicité par un ressort, une pièce intermédiaire, une tige filetée (14) et un clapet de refoulement (16) raccordé à une conduite de sortie de carburant (17). Selon l'invention, l'obturateur (12) de la soupape d'aspiration (10) est réalisé sous la forme d'une soupape en champignon (18) dont la face frontale est sollicitée par le ressort (11) et qui est dotée d'un épaulement terminal (9), d'au moins deux canaux (20,20',20'') reliés à ce dernier et répartis sur la circonférence, et d'une plaque de base (34). Une plaque de butée (22), en tant que pièce intermédiaire, est adjacente à l'épaulement terminal (19) de la soupape en champignon (18) et dotée d'une autre plaque de base (36) située dans le prolongement de la tige filetée (14).

Claims (9)

  1. Pompe à piston radial (1) pour l'alimentation en carburant à haute pression d'un moteur à combustion interne, comprenant :
    une chambre de compression (4) aménagée dans un boîtier à déplacement (3),
    des pistons (7) aménagés dans un espace cylindrique (6) et déplaçables dans les deux sens,
    une soupape d'aspiration (10) raccordée à une conduite d'alimentation en carburant (9), avec un corps de fermeture (12) sollicité par un ressort (11), une pièce intermédiaire et une tige filetée (14), et
    une soupape de compression (16) raccordée à une conduite de sortie de carburant (17),
    caractérisée en ce que
    le corps de fermeture (12) de la soupape d'aspiration (10) se présente sous la forme d'un champignon de soupape (18) sollicité côté frontal par le ressort (11) avec un collet d'arrêt (19) et avec, à la suite, au moins deux canaux (20, 20', 20") répartis sur le pourtour et une plaque de base (34), et
    une plaque de butée (22), avec une autre plaque de base (36) à laquelle est raccordée la tige filetée (14), est adjacente comme pièce intermédiaire au collet d'arrêt (19) du champignon de soupape (18).
  2. Pompe à piston radial selon la revendication 1, caractérisée en ce que le champignon de soupape (18) présente trois canaux (20, 20', 20") répartis sur le pourtour et qui coupent la plaque de base (34).
  3. Pompe à piston radial selon la revendication 1 et 2, caractérisée en ce que la plaque de butée (22) présente, sur le côté opposé au collet d'arrêt (19), au moins deux canaux (24, 24') s'étendant radialement et raccordés à la plaque de base (36), qui se situent dans la zone de la conduite d'alimentation en carburant (9).
  4. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que la soupape d'aspiration (10) est aménagée dans la direction transversale par rapport à l'axe vertical (0 - 0) du piston (7).
  5. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que la soupape d'aspiration (10) est aménagée dans le boîtier à déplacement (3).
  6. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que le champignon de soupape (18) est monté de manière à pouvoir être déplacé dans un espace cylindrique (38) du boîtier à déplacement (3) et définit avec son côté frontal tourné vers le ressort (11) et le côté avant de l'espace cylindrique définit la course (H) de la soupape d'aspiration (10).
  7. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que la tige filetée (14) avec un collet (26) est adjacente côté frontal à la zone de la plaque de butée (22), dans laquelle sont aménagés la plaque de base (36) et les deux canaux (24, 24').
  8. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que la tige filetée (14) présente, à la suite de la zone (28) des pas de filet, une rainure périphérique (30) dans laquelle est inséré un joint d'étanchéité annulaire (32).
  9. Pompe à piston radial selon une ou plusieurs des revendications précédentes, caractérisée en ce que la plaque de butée (22) est aménagée entre un collet (40) dans le boîtier à déplacement (3) et la tige filetée (14), à laquelle se raccorde l'espace cylindrique (38) de plus petit diamètre pour le champignon de soupape (28).
EP07727923A 2006-04-11 2007-04-10 Pompe à piston radial pour l'alimentation haute pression en carburant d'un moteur à combustion interne Ceased EP2007979B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006017037.7A DE102006017037B4 (de) 2006-04-11 2006-04-11 Radialkolbenpumpe zur Kraftstoffhochdruckversorgung bei einer Brennkraftmaschine
PCT/EP2007/053455 WO2007116053A1 (fr) 2006-04-11 2007-04-10 Pompe à piston radial pour l'alimentation haute pression en carburant d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2007979A1 EP2007979A1 (fr) 2008-12-31
EP2007979B1 true EP2007979B1 (fr) 2010-02-24

Family

ID=38249225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727923A Ceased EP2007979B1 (fr) 2006-04-11 2007-04-10 Pompe à piston radial pour l'alimentation haute pression en carburant d'un moteur à combustion interne

Country Status (5)

Country Link
US (1) US7775190B2 (fr)
EP (1) EP2007979B1 (fr)
JP (1) JP4971425B2 (fr)
DE (2) DE102006017037B4 (fr)
WO (1) WO2007116053A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009004478B4 (de) 2009-01-13 2014-08-14 Continental Automotive Gmbh Sitzventil sowie Verfahren zu dessen Herstellung
EP2278163A1 (fr) * 2009-07-20 2011-01-26 Delphi Technologies Holding S.à.r.l. Ensemble de pompe
DE102010001880A1 (de) * 2010-02-12 2011-08-18 Robert Bosch GmbH, 70469 Zylinderkopf für eine Kraftstoffhochdruckpumpe
ITMI20130023A1 (it) * 2013-01-09 2014-07-10 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
ES2402636B1 (es) * 2013-03-08 2014-01-23 Zertan S.A. Válvula de contrapresión para inyectores de combustible
JP7139974B2 (ja) * 2019-01-25 2022-09-21 株式会社デンソー 燃料噴射ポンプ
PL4006339T3 (pl) 2020-11-27 2024-10-07 Erbe Elektromedizin Gmbh Jednostka pompująca do celów medycznych

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0320181A (ja) * 1989-03-23 1991-01-29 Nippon Piston Ring Co Ltd 逆止弁
JPH0343179U (fr) * 1989-09-05 1991-04-23
DE4027794C2 (de) * 1990-09-01 2002-06-20 Continental Teves Ag & Co Ohg Hydraulische Radialkolbenpumpe
DE4027848A1 (de) * 1990-09-03 1992-03-05 Teves Gmbh Alfred Kolbenpumpe
DE4136624A1 (de) * 1991-11-07 1993-05-27 Daimler Benz Ag Ventilgesteuertes verdraengeraggregat mit ventilausloesung
DE19653895A1 (de) * 1996-12-21 1998-06-25 Teves Gmbh Alfred Pumpe, insbesondere für eine hydraulische Bremsschlupfregelanlage
DE19729791A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Radialkolbenpumpe zur Kraftstoffhochdruckversorgung
DE19732791A1 (de) * 1997-07-30 1999-02-04 Bosch Gmbh Robert Kolbenpumpe
DE19841642C2 (de) * 1998-09-11 2002-07-18 Bosch Gmbh Robert Radialkolbenpumpe
JP2000097380A (ja) * 1998-09-24 2000-04-04 Sanoh Industrial Co Ltd 流体管用コネクタ−
DE19848035A1 (de) 1998-10-17 2000-04-20 Bosch Gmbh Robert Radialkolbenpumpe für Kraftstoffhochdruckerzeugung
DE10117600C1 (de) * 2001-04-07 2002-08-22 Bosch Gmbh Robert Hochdruck-Kraftstoffpumpe für ein Kraftstoffsystem einer direkteinspritzenden Brennkraftmaschine, Kraftstoffsystem sowie Brennkraftmaschine
ITTO20011039A1 (it) * 2001-10-30 2003-04-30 Ct Studi Componenti Per Veicol Valvola di aspirazione per una pompa ad alta pressione, in particolare per combustibile di un motore endotermico.
DE10228552B9 (de) 2002-06-26 2007-08-23 Siemens Ag Radialkolbenpumpeneinheit
WO2005078273A1 (fr) 2004-02-11 2005-08-25 Robert Bosch Gmbh Pompe haute pression, notamment pour un dispositif d'injection de carburant dans un moteur a combustion interne
DE102004028073B3 (de) 2004-06-09 2005-08-04 Siemens Ag Rückschlagventil

Also Published As

Publication number Publication date
US20090126695A1 (en) 2009-05-21
JP4971425B2 (ja) 2012-07-11
WO2007116053A1 (fr) 2007-10-18
EP2007979A1 (fr) 2008-12-31
DE102006017037B4 (de) 2015-09-17
DE102006017037A1 (de) 2007-10-18
US7775190B2 (en) 2010-08-17
JP2009533594A (ja) 2009-09-17
DE502007002933D1 (de) 2010-04-08

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