EP1891323B1 - Unite de dosage de carburant pour pompe a carburant haute pression et pompe a carburant haute pression - Google Patents

Unite de dosage de carburant pour pompe a carburant haute pression et pompe a carburant haute pression Download PDF

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Publication number
EP1891323B1
EP1891323B1 EP06725632A EP06725632A EP1891323B1 EP 1891323 B1 EP1891323 B1 EP 1891323B1 EP 06725632 A EP06725632 A EP 06725632A EP 06725632 A EP06725632 A EP 06725632A EP 1891323 B1 EP1891323 B1 EP 1891323B1
Authority
EP
European Patent Office
Prior art keywords
metering unit
fuel metering
armature
valve piston
bearing bush
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.)
Not-in-force
Application number
EP06725632A
Other languages
German (de)
English (en)
Other versions
EP1891323A1 (fr
Inventor
Nestor Rodriguez-Amaya
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 EP1891323A1 publication Critical patent/EP1891323A1/fr
Application granted granted Critical
Publication of EP1891323B1 publication Critical patent/EP1891323B1/fr
Not-in-force 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment

Definitions

  • the invention is based on a fuel metering unit for suction-side delivery rate control of the high-pressure fuel pump of an internal combustion engine, wherein the fuel metering unit comprises a solenoid actuated control valve with a valve piston, wherein the electromagnet comprises an armature and an anchor bolt, and with a bearing bush, wherein a first bearing bush between the Anchor and the valve piston is arranged and the first bearing bush, the anchor bolt axially displaceable leads.
  • Such a fuel metering unit is for example from DE 102 47 436 A1 known.
  • a bearing is disposed between an armature and a spool and a valve body.
  • the armature of the electromagnet is surrounded by a bearing bush and axially displaceably guided.
  • the invention has for its object to provide a Kraftstoffzumessaku with better performance and increased life.
  • a fuel metering unit for the suction side Flow control of the high-pressure fuel pump of an internal combustion engine
  • the indicator comprises a solenoid actuated control valve with a valve piston
  • the electromagnet comprises an armature and an anchor bolt
  • armature, anchor bolt and valve piston are interconnected and with a bearing bush
  • a first bearing bush is arranged between the anchor bolt and the valve piston, and the first bearing bush axially displaceably guides and supports the anchor bolt.
  • a second bearing bush between the armature and the valve piston is arranged, which guides the anchor bolt axially displaceable.
  • non-negligible wear occurs during operation of the fuel metering unit according to the invention because the armature is soft annealed to optimize the magnetic properties.
  • the anchor bolt from a more wear-resistant material than, for example, hardened steel.
  • the surface roughness of the anchor bolt can be kept very small, which in turn has a positive effect on the frictional forces between bearing bush and anchor bolt and drastically reduces wear.
  • the leadership of the anchor bolt is further improved. Due to the two spaced bearing bushes of the anchor bolt can not tilt or sideways dodge so that the armature is very well aligned with the solenoid. As a result, the operating behavior and the service life of the fuel metering unit according to the invention are further improved.
  • the anchor bolt projects beyond the magnet when the second bearing bush is arranged on the end of the anchor bolt facing away from the valve piston.
  • the second bushing is mounted in a magnet pot of the electromagnet.
  • the bushings arranged between the magnet and the valve piston can advantageously be fastened in a valve housing of the fuel metering unit.
  • bearing bushes are made of bronze.
  • plastic in particular fuel-resistant and heat-resistant plastic.
  • valve piston can be guided in the valve housing.
  • the fuel metering unit according to the Characters. 1 and 2 is based on an electromagnet 1 with integrated control valve 3.
  • the most important components of the electromagnet 1 are a magnetic coil 5, an armature 7 with anchor bolt 9 and a magnet pot 11, which encloses the magnetic coil 5 and the armature 7 partially.
  • the entire fuel metering unit is arranged in a high-pressure fuel pump (not shown).
  • the magnet pot 11 serves as a sealing element at the same time; as a magnetic return and as a fastener in the high-pressure pump.
  • the attachment function is essentially fulfilled by the flange 13.
  • the control valve 3 has a valve housing 15, which merges into a widening 17, which at the same time forms the frontal end of the magnet pot 11.
  • an axial bore 19 is formed, which is arranged coaxially with the anchor bolt 9 of the electromagnet 1.
  • the axial bore 19 receives a displaceable sleeve-shaped valve piston 21, in the interior of which a compression spring 23 is arranged.
  • Compression spring 23 is supported at one end on a bottom 25 of the valve piston 21. At the other end, the compression spring 23 is supported on a spring plate 27 located in the axial bore 19. At the end facing away from the spring plate 27 of the valve piston 21, this is in contact with the one end of the anchor bolt 9. The compression spring 23 ensures that each adjusting movement of the anchor bolt 9 is transmitted directly to the valve piston 21.
  • An opening 29 in the spring plate 27 connects the interior (without reference numeral) of the valve piston 21 with a not shown pre-feed pump of the fuel injection system.
  • valve housing 15 In the valve housing 15 a plurality of radially directed control openings 31 are arranged.
  • the control openings 31 are in hydraulic operative connection with the low-pressure region of the high-pressure fuel pump, not shown.
  • the flow direction from the opening 29 through the valve piston 21 and the control openings 31 can also be reversed.
  • the control openings 31 would then be connected to the pressure side of the prefeed pump, while the opening 29 would be hydraulically connected to the low-pressure region of the high-pressure pump.
  • the upper half of the FIG. 1 shows the control valve 11 in the open position in which the control port 31 is completely released by the valve piston 21.
  • the control valve 3 In the lower half of the FIG. 1 the control valve 3 is shown in its closed position.
  • the magnetic force of the energized electromagnet 1 via the armature 7 and the anchor bolt 9 acts on the valve piston 21 and moves this against the compression spring 23 in said closed position.
  • the compression spring 23 can move the valve piston 21 in the open position as soon as the energization of the electromagnet 1 and thus its acting on the armature 7 and the anchor bolt 9 magnetic force is reduced accordingly.
  • a compensation bore 33 is provided in the bottom 25 of the valve piston 21 . Also in the anchor 7 compensating holes 35 are provided.
  • non-inventive fuel metering unit protrudes the anchor bolt 9 via the armature 7 in the magnet pot 11 addition.
  • a first bearing bush 37 is pressed in the valve housing 15.
  • the first bearing bush 37 serves to guide the anchor bolt 9 and with it the armature 7 in the axial direction. Since the anchor bolt 9 can be made of a wear-resistant material, such as hardened steel, the bearing of the moving parts of the electromagnet 1 by means of the first bearing bush 37 is very durable and virtually wear-free. Because of the naturally small diameter of the anchor bolt 9 in comparison to the outer diameter of the armature 7 and the friction between the first bearing bush 37 and the anchor bolt 9 is very low.
  • a second bearing bush 39 is pressed into the magnet pot 11. As a result, the tilting of the anchor bolt 9 is prevented.
  • the two-sided guidance of the anchor bolt 9 also ensures that the armature 7 can not escape in the radial direction, if, for example, the magnetic forces exerted by the magnetic coil 5 on the armature 7 have a radial component. Because of the precise and low-wear guidance of the anchor bolt 9 in the bearing bushes 37 and 39 is also ensured that the armature 7 does not come into contact with the magnet pot 11 and thus there neither friction nor wear can occur.
  • FIG. 2 an embodiment of a fuel metering unit according to the invention is shown, in which the overall length compared to in FIG. 1 shown Kraftstoffzumessaku is somewhat shortened and at the same time a precise and low-wear guidance of the anchor bolt 9 and with it the armature 7 is achieved.
  • both the first bearing bush 37 and the second bearing bush 39 are arranged in the region between the armature 7 and the valve piston 21.
  • Both bearing bushes 37 and 39 are pressed into the magnet pot 11 and are spaced from each other in the axial direction of the anchor bolt 9. As a result, a tilting of the anchor bolt 9 and thus also a grinding or contact between the armature 7 and the magnet pot 11 is effectively prevented.

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

Claims (9)

  1. Unité de dosage de carburant pour la régulation de quantités refoulées du côté de l'aspiration de la pompe haute pression pour carburant d'un moteur à combustion interne, dans laquelle l'unité de dosage de carburant présente une soupape de régulation (3) actionnée par un électroaimant (1) avec un piston de soupape (21), l'électroaimant (1) présentant un induit (7) et un boulon d'induit (9) et au moins une douille de palier, une première douille de palier (37) étant disposée entre l'induit (7) et le piston de soupape (21), et la première douille de palier (37) guidant le boulon d'induit (9) de manière déplaçable axialement, caractérisée en ce qu'une deuxième douille de palier (39) est disposée entre l'induit (7) et le piston de soupape (21), et en ce que la deuxième douille de palier (39) guide le boulon d'induit (9) de manière déplaçable axialement.
  2. Unité de dosage de carburant selon la revendication 1, caractérisée en ce que les douilles de palier (37, 39) disposées entre l'induit (7) et le piston de soupape (21) sont fixées dans un boîtier de soupape (15).
  3. Unité de dosage de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que l'électroaimant (1) est réalisé sous forme d'aimant d'induit plongeur.
  4. Unité de dosage de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que les douilles de palier (37, 39) sont fabriquées en bronze.
  5. Unité de dosage de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que les douilles de palier (37, 39) sont fabriquées en plastique, en particulier en plastique résistant au carburant et/ou en plastique résistant à la température.
  6. Unité de dosage de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que le piston de soupape (21) est guidé dans le boîtier de soupape (15).
  7. Unité de dosage de carburant selon l'une quelconque des revendications précédentes, caractérisée en ce que le piston de soupape (21) est réalisé en forme de manchon et reçoit dans son espace interne un ressort de compression (23) et en ce que le ressort de compression (23) s'appuie à une extrémité au moins de manière indirecte contre le boîtier de soupape (15).
  8. Unité de dosage de carburant selon la revendication 7, caractérisée en ce que dans le boîtier de soupape (15) est prévue une coupelle de ressort (27) et en ce que le ressort de compression (23) s'appuie à une extrémité contre la coupelle de ressort (27).
  9. Pompe haute pression pour carburant pour un système d'injection de carburant comprenant au moins un élément de pompe et une unité de dosage de carburant pour la régulation de quantités refoulées, caractérisée en ce que l'unité de dosage de carburant est réalisée selon l'une quelconque des revendications précédentes.
EP06725632A 2005-06-06 2006-04-07 Unite de dosage de carburant pour pompe a carburant haute pression et pompe a carburant haute pression Not-in-force EP1891323B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005025872A DE102005025872A1 (de) 2005-06-06 2005-06-06 Kraftstoffzumesseinheit für eine Kraftstoffhochdruckpumpe und Kraftstoffhochdruckpumpe
PCT/EP2006/061419 WO2006131408A1 (fr) 2005-06-06 2006-04-07 Unite de dosage de carburant pour pompe a carburant haute pression et pompe a carburant haute pression

Publications (2)

Publication Number Publication Date
EP1891323A1 EP1891323A1 (fr) 2008-02-27
EP1891323B1 true EP1891323B1 (fr) 2009-11-11

Family

ID=36406536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06725632A Not-in-force EP1891323B1 (fr) 2005-06-06 2006-04-07 Unite de dosage de carburant pour pompe a carburant haute pression et pompe a carburant haute pression

Country Status (6)

Country Link
US (1) US20080271708A1 (fr)
EP (1) EP1891323B1 (fr)
JP (1) JP2008545917A (fr)
AT (1) ATE448403T1 (fr)
DE (2) DE102005025872A1 (fr)
WO (1) WO2006131408A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007059855A1 (de) * 2007-12-12 2009-06-25 Robert Bosch Gmbh Kraftstoffzumesseinheit für eine Kraftstoffhochdruckpumpe und Kraftstoffhochdruckpumpe
DE102008043798A1 (de) 2008-11-17 2010-05-20 Robert Bosch Gmbh Kraftstoffzumesseinheit für eine Kraftstoffpumpe
DE102009028501A1 (de) * 2009-08-13 2011-02-17 Robert Bosch Gmbh Kraftstoffzumesseinrichtung für eine Kraftstoffeinspritzanlage
JP6245238B2 (ja) 2015-09-11 2017-12-13 トヨタ自動車株式会社 燃料ポンプ
JP6217725B2 (ja) 2015-10-06 2017-10-25 トヨタ自動車株式会社 燃料ポンプ
CN106224621A (zh) * 2016-09-09 2016-12-14 广东意希诺科技有限公司 分体式燃油计量阀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002004977A (ja) * 2000-06-26 2002-01-09 Denso Corp 流量制御装置
US6669166B2 (en) * 2000-07-28 2003-12-30 Nippon Soken, Inc. Electromagnetic valve
JP2003120845A (ja) * 2001-10-12 2003-04-23 Denso Corp 調量弁装置およびそれを用いた燃料噴射ポンプ
US6824120B2 (en) * 2001-11-09 2004-11-30 Denso Corporation Flow amount control device
JP2005299683A (ja) * 2001-11-27 2005-10-27 Bosch Corp 液体の流量制御弁および可動子のためのアンカー
DE10242219A1 (de) * 2002-09-12 2004-03-25 Robert Bosch Gmbh Kraftstoffzumesseinheit für eine Kraftstoffeinspritzanlage

Also Published As

Publication number Publication date
WO2006131408A1 (fr) 2006-12-14
DE502006005349D1 (de) 2009-12-24
DE102005025872A1 (de) 2006-12-07
ATE448403T1 (de) 2009-11-15
EP1891323A1 (fr) 2008-02-27
US20080271708A1 (en) 2008-11-06
JP2008545917A (ja) 2008-12-18

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