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WO2009013175A1 - Pompe, en particulier pompe à carburant haute pression - Google Patents

Pompe, en particulier pompe à carburant haute pression Download PDF

Info

Publication number
WO2009013175A1
WO2009013175A1 PCT/EP2008/059209 EP2008059209W WO2009013175A1 WO 2009013175 A1 WO2009013175 A1 WO 2009013175A1 EP 2008059209 W EP2008059209 W EP 2008059209W WO 2009013175 A1 WO2009013175 A1 WO 2009013175A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
drive shaft
axis
rotation
pair
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
PCT/EP2008/059209
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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 WO2009013175A1 publication Critical patent/WO2009013175A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
    • 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
    • F04B1/0413—Cams
    • 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
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F04B1/0536—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units
    • F04B1/0538—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units located side-by-side
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/103—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being a radial piston pump
    • 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
    • F04B53/006—Crankshafts

Definitions

  • the invention relates to a pump, in particular high-pressure fuel pump according to the preamble of claim 1.
  • Such a pump in the form of a high-pressure fuel pump is known from DE 199 07 311 Al.
  • This pump has a drive shaft which is provided with a double cam whose cam is about 180 ° about the axis of rotation of
  • the pump also has a pair of pumping elements, each driven at least indirectly by the double cam in a reciprocating motion.
  • the pump pistons are arranged rotated by about 90 ° about the axis of rotation of the drive shaft to each other.
  • the pump pistons are supported by one roller tappet on the double cam.
  • FIG. 1 shows a pump in one
  • FIG. 1 Longitudinal section according to a first embodiment
  • Figure 2 the pump in a cross section along line II-II in Figure 1
  • Figure 3 shows the pump in a longitudinal section according to a second embodiment
  • Figure 4 shows the pump in a cross section along line IV-IV in Figure 3.
  • a pump is shown, in particular a high-pressure fuel pump for a
  • the pump has a housing 10, which may be designed in several parts and in which a rotationally driven drive shaft 12 is arranged.
  • the drive shaft 12 is rotatably supported in the housing 10 via two spaced apart in the direction of the axis of rotation 13 of the drive shaft 12 bearings 14 and 15.
  • the bearings 14,15 can be arranged in different parts 16,17 of the housing 10.
  • the drive shaft 12 In a region lying between the two bearing points 14, 15, the drive shaft 12 has two double cams 18, 20 arranged next to one another in the direction of its axis of rotation 13. Between the two double cams 18,20, a further bearing point of the drive shaft 12 may be provided.
  • the cams of the double cams 18, 20 are in each case rotated through approximately 180 ° about the axis of rotation 13 of the drive shaft 12 relative to each other and thus each arranged approximately diametrically opposite one another.
  • the two double cams 18 and 20 are mutually rotated by an angle ß of about 45 ° about the rotational axis 13 of the drive shaft 12 is arranged.
  • the pump has associated with each one of the double cam 18,20 a first pair of pump elements 22,23 and a second pair of pump elements 24,25.
  • Each of the pump elements 22 to 25 each have a pump piston 28 which is driven by the double cam 18 and 20 of the drive shaft 12 at least indirectly in a lifting movement in at least approximately radial direction to the rotation axis 13 of the drive shaft 12.
  • the pump elements 22 and 23 are designed such that their pump pistons 28 are arranged rotated by an angle ⁇ of about 90 ° about the rotational axis 13 of the drive shaft 12 to each other.
  • the pump elements 24,25 designed so that their
  • Pump piston 28 are also arranged rotated by about 90 ° about the axis of rotation 13 of the drive shaft 12 to each other.
  • the pump piston 28 is supported, for example, via a plunger 30 and a roller 32 rotatably mounted in this or in a roller shoe 31 arranged in the plunger 30 on the double cam 18 or 20.
  • the pump piston 28 and the plunger 30 are acted upon by a prestressed spring 34 to the double cam 18 and 20 out.
  • the pump piston 28 is guided in a cylinder bore 36 in a housing part 38 tightly displaceable and limited with his Drive shaft 12 facing away from the end face in the cylinder bore 36 a pump working space 40.
  • the pump working chamber 40 has a running in the housing of the pump fuel inlet passage 42 with a connection to a fuel inlet, for example a feed pump.
  • an inlet check valve 44 opening into the pump working chamber 40 is arranged.
  • the pump working chamber 40 furthermore has a connection with an outlet, which is connected to a high-pressure accumulator 110, for example, via a fuel outlet channel 46 running in a housing part of the pump.
  • One or preferably a plurality of injectors 120 arranged on the cylinders of the internal combustion engine are connected to the high-pressure accumulator 110, through which fuel is injected into the cylinders of the internal combustion engine.
  • an outlet check valve 48 which opens out of the pump working chamber 40 is arranged.
  • the pump elements 22,23,24,25 with pump piston 28, plunger 30, roller 32, spring 34 and housing part 38 are preferably formed identically, so that the production cost is kept low.
  • the pump piston 28 of the second pair of pump elements 24,25 with respect to the pump piston 28 of the first pair of pump elements 22,23 about the rotational axis 13 of the drive shaft 12 is rotated by about 180 °.
  • For the pump thus results in a uniform low drive torque, since the delivery strokes of the pump piston 28 of the pump elements 22 to 25 evenly over a revolution of the drive shaft 12th are distributed.
  • the pump pistons 28 are driven according to the profile of the double cam 18,20 in a lifting movement.
  • the respective pump working chamber 40 is filled with fuel through the fuel inlet channel 42 when the inlet valve 44 is open, the outlet valve 48 being closed.
  • the respective pump piston 28 is held in its suction stroke by the spring 34 via the plunger 30 and the roller 32 in contact with the double cam 18 and 20 respectively.
  • fuel is pumped under high pressure through the fuel discharge passage 46 with the exhaust valve 48 open to the high-pressure accumulator 110, wherein the inlet valve 44 is closed.
  • FIGS. 3 and 4 the pump according to a second exemplary embodiment is shown, in which the basic construction is the same as in the first embodiment, but the arrangement of the second pair of pump elements 24, 25 is modified.
  • the drive shaft 12 has the two adjacent to each other in the direction of the rotational axis 13 arranged double cams 18 and 20, which are mutually rotated about the rotational axis 13 by an angle ß of about 45 °.
  • Pump elements 24,25 are each rotated by a Winekl ⁇ of about 90 ° about the rotational axis 13 of the drive shaft 12 to each other.
  • the pump pistons 28 of the second pair of pump elements 24, 25 are at least approximately in the same with respect to the axis of rotation 13 of the drive shaft 12
  • Conveying strokes of the pump piston 28 of the pump elements 22 to 25 are uniformly distributed over one revolution of the drive shaft 12.
  • the pump pistons 28 of the second pair of pump elements 24, 25 can also be arranged in any other rotational positions with respect to the axis of rotation 13 of the drive shaft 12 in which these are about 90 ° or an integer multiple of 90 ° with respect to the pump piston 28 of the first pair of pump elements 22,23 are arranged twisted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une pompe, en particulier une pompe à carburant haute pression, présentant un arbre de commande (12) qui comporte une première came à double profil (18), dont les profils sont disposés à environ 180° l'un par rapport à l'autre autour de l'axe de rotation (13) de l'arbre de commande (12). Il est prévu une première paire d'éléments de pompe (22, 23) présentant chacune un piston de pompe (28) entraîné en un mouvement alternatif, au moins indirectement par la première came à double profil (18), lesdits éléments étant disposés à environ 90° l'un par rapport à l'autre, autour de l'axe (13) de l'arbre de commande (12). L'arbre de commande (12) présente, en direction de son axe de rotation (13), outre la première came à double profil (18), une seconde came à double profil (20), dont les profils sont disposé à environ 180° l'un par rapport à l'autre, autour de l'axe de rotation (13) de l'arbre de commande (12). La seconde came à double profil (20) est disposée à environ 45° par rapport à la première came à double profil (18), autour de l'axe (13) de l'arbre de commande (12). Il est prévu une seconde paire d'éléments de pompe (24, 25), présentant chacune un piston de pompe (28) entraîné en un mouvement alternatif, au moins indirectement par la seconde came à double profil (20), lesdits éléments étant disposés à environ 90° l'un par rapport à l'autre, autour de l'axe de rotation (13) de l'arbre de commande (12).
PCT/EP2008/059209 2007-07-26 2008-07-15 Pompe, en particulier pompe à carburant haute pression Ceased WO2009013175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007035100.5 2007-07-26
DE102007035100A DE102007035100A1 (de) 2007-07-26 2007-07-26 Pumpe, insbesondere Kraftstoffhochdruckpumpe

Publications (1)

Publication Number Publication Date
WO2009013175A1 true WO2009013175A1 (fr) 2009-01-29

Family

ID=39877900

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/059209 Ceased WO2009013175A1 (fr) 2007-07-26 2008-07-15 Pompe, en particulier pompe à carburant haute pression

Country Status (2)

Country Link
DE (1) DE102007035100A1 (fr)
WO (1) WO2009013175A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107076125A (zh) * 2014-09-11 2017-08-18 赫梅蒂克水力公司 位移装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027312A1 (de) * 2009-06-30 2011-01-05 Robert Bosch Gmbh Mehrkolbenpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697403A (en) * 1949-06-06 1954-12-21 Melba L Benedek Hydraulic pump or motor
DE19907311A1 (de) * 1999-02-22 2000-08-31 Bosch Gmbh Robert Hydraulikpumpeneinheit
DE102005055057A1 (de) * 2005-11-18 2007-05-24 Robert Bosch Gmbh Mehrkolbenpumpe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697403A (en) * 1949-06-06 1954-12-21 Melba L Benedek Hydraulic pump or motor
DE19907311A1 (de) * 1999-02-22 2000-08-31 Bosch Gmbh Robert Hydraulikpumpeneinheit
DE102005055057A1 (de) * 2005-11-18 2007-05-24 Robert Bosch Gmbh Mehrkolbenpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107076125A (zh) * 2014-09-11 2017-08-18 赫梅蒂克水力公司 位移装置

Also Published As

Publication number Publication date
DE102007035100A1 (de) 2009-01-29

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