EP1022460A2 - Méthode de montage - Google Patents

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Publication number
EP1022460A2
EP1022460A2 EP00100847A EP00100847A EP1022460A2 EP 1022460 A2 EP1022460 A2 EP 1022460A2 EP 00100847 A EP00100847 A EP 00100847A EP 00100847 A EP00100847 A EP 00100847A EP 1022460 A2 EP1022460 A2 EP 1022460A2
Authority
EP
European Patent Office
Prior art keywords
pump
suction
pressure
valve
units
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.)
Granted
Application number
EP00100847A
Other languages
German (de)
English (en)
Other versions
EP1022460A3 (fr
EP1022460B1 (fr
Inventor
Bernhard Arnold
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1022460A2 publication Critical patent/EP1022460A2/fr
Publication of EP1022460A3 publication Critical patent/EP1022460A3/fr
Application granted granted Critical
Publication of EP1022460B1 publication Critical patent/EP1022460B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • F04B51/00—Testing machines, pumps, or pumping installations

Definitions

  • the invention relates to a method for assembling a hydrostatic pump with several in one pump housing recorded pump units according to the preamble of claim 1 and a radial piston pump assembled according to the method.
  • the hydrostatic pumps assembled according to the procedure can be used as a radial piston pump to generate high pressures, for example, in the pressure range from 50 to 1000 bar become. Areas of application can be found in the Vehicle, industrial, flight and water hydraulics and in particular in mobile hydraulics and - increasingly recently - in common rail fuel injection systems.
  • the Radial piston pumps are designed as variable pumps, whereby the volume setting etc. by stroke adjustment or can be done by suction throttling. Especially in applications where the device engineering effort is minimal should be and furthermore an optimal efficiency if partial funding is sought, the suction throttled Variable pumps of the constructions with stroke adjustment preferred.
  • the suction valves are usually spring-loaded Check valves are formed in which a suction valve body via a suction valve spring against a valve seat is biased.
  • the suction valve body can against the Force of the suction valve spring by the pressure difference between the pressure downstream of the intake throttle valve and in the cylinder chamber the assigned pump unit, i.e. by the pressure difference be opened above the suction valve body.
  • FIG. 1 two diagrams are shown in which the pressure p is one Radial piston pump with three pump units over time t is shown.
  • the diagram of Figure 1a shows the Pressure conditions with a low throttling of the volume flow to the pump, the degree of filling, for example 50% may be.
  • Figure 1b shows the pressure conditions at a lower filling level of, for example, 10%. Because of the temporally successive pumping units there is no constant pressure at the outlet of the radial piston pump but a pressure pulsation, with each peak 1, 2, 3 the Compression stroke of the assigned 1st, 2nd or 3rd pump unit corresponds.
  • the pump unit 1 conveys one Filling level of 10% no longer, so that there is a strong Pressure and volume flow pulsation at the pressure connection of the pump sets.
  • the invention is based on the object a method of assembling a hydrostatic pump and a radial piston pump installed according to this procedure create where the pressure and volume flow pulsation is minimized at low filling levels.
  • the pressure areas are dimensioned so narrow that the premature Switching off one or more pump units is practical is excluded.
  • the print areas can, for example as equal pressure intervals with 1/10 bar steps or larger with increasing suction opening pressure are going to be determined. That is, the print areas can for example with a 0.7 bar suction valve spring in groups from 0.6 to 0.7 bar; 0.7 to 0.8 bar; 0.8 to 0.9 bar ... or with increasing intervals - such as 0.7 to 0.77 bar; 0.78 to 0.86 bar; 0.87 to 0.96 bar ... to get voted.
  • the invention can be particularly advantageous in a Use a radial piston pump with three or more pump units, which, for example, as a high-pressure pump in a common rail fuel injection system is used and with the pressures up to 1500 bar can be generated.
  • FIGS 2 and 3 show views of a radial piston pump 1 with three pumping units 2a, 2b, 2c, which are operated by one common drive shaft 4 are driven.
  • the Pump units 2a, 2b, 2c and the drive shaft 4 are in a pump housing 6 mounted on the also a suction port 8 and a pressure connection 10 (Figure 2) are formed.
  • FIG. 2 shows a partial sectional view along the Line A-A in Figure 3.
  • the drive shaft 4 has an eccentric 12, on which an eccentric ring 16 is guided via a slide ring 14 is.
  • Each of the pump units by way of example based on FIG. 2 only the pump unit 2a is described has one Piston 18 of a slide shoe 20 on a flat of the eccentric ring 16 is supported.
  • Each pump unit 2 has a displacement housing 22 in which the piston 18 is guided axially and with a in the radial direction expanded cylinder head 24 on a Mounting flange 26 of the pump housing 6 is attached.
  • a suction valve 28 is received in the cylinder head 24, through which the suction port 8 with the cylinder chamber 30 of the Displacer housing 22 is connectable.
  • the pressurized pressure medium (fuel) is led through an angular bore 32 to a pressure valve 34, that in the parting plane between the cylinder head 24 and the Mounting flange 26 is formed. Downstream of the Pressure valve 34 is a pressure channel 36 in the pump housing 6 formed in a connected to the pressure port 10 Collection channel 38 opens.
  • the suction port is over a suction line 40 connected to a suction throttle valve 42, through which the from a tank T by means of a prefeed pump 44 fuel flow rate is throttled to adjust the filling level of the radial piston pump 1.
  • the Suction throttle valve 42 can, for example, be proportional adjustable two-way valve that runs over the motor control is activated.
  • the fuel delivered by the pump units 2a, 2b, 2c is conveyed to the common rail via the pressure connection 10, is arranged in the fuel injection nozzles 48.
  • the other components of the common rail injection system are in the highly simplified representation according to Figure 2 not taken into account as this for understanding the invention are of minor importance.
  • Control of the radial piston pump 1 (high pressure pump) and of the suction throttle valve 42 vary.
  • the suction valve 28 can be a preassembled unit, for example in cartridge design etc. in the displacer housing 22 are screwed in or, as in the case in FIG 2 shown embodiment directly in the displacer 22 be mounted.
  • FIG. 4 shows a detailed representation, of the suction valve 28 from FIG. 2.
  • valve seat insert 52 is screwed in, on the one hand forms a valve seat 54 and on the other hand the Receiving hole 50 seals to the outside.
  • a suction valve spring 56 supported, via which a suction valve body 58 against the Valve seat 54 is biased.
  • the suction valve insert 52 has a valve seat side Blind hole 60, the radial holes 62 in one Annulus 64 opens out via a suction channel with the suction connection 8 is connected.
  • the suction valve spring 56 is for example designed as a 0.7 bar spring, i.e. the pressure on the valve seat end face of the suction valve body 58 must be 0.7 bar higher than the pressure at the back of the Suction valve body 58 against the suction valve body 58 to lift the force of the suction valve spring 56 from the valve seat 54.
  • this only applies if the manufacturing tolerances of the components according to the specifications and the suction valve spring are a first approximation has spring characteristic independent of the path. In the In practice, however, these requirements are only disproportionate big effort realizable, so that the opening pressure for the suction valve 28 from the predetermined opening pressure (0.7 bar) deviates and changes when operating the radial piston pump adjust the irregularities shown in Figure 1b.
  • the pre-assembled pump units are now 2a, 2b, 2c, with the suction valve 28 and possibly the piston 18 subjected to a preliminary test in which the individual Suction valve opening pressure determined for each pump unit 2a becomes.
  • these groups can include, for example, pressure intervals of 0.1 bar based on a minimum pressure of 0.6 bar or pressure intervals dependent on the pressure level.
  • group 1 2nd 3rd 4th 5 constant pressure intervals (bar) 0.6 - 0.71 - 0.81 - 0.91 - 1.1 - 0.7 0.8 0.9 1.0 1.2
  • Variable pressure interval (bar) 0.6 - 0.67 - 0.75 - 0.84 - 0.93 - 0.66 0.74 0.83 0.93 1.03
  • the selection process according to the invention can be also with other suction-restricted pump types deploy.
  • a method for assembling a suction-throttled device is disclosed hydrostatic pump with multiple pump units, at which the suction valve opening pressure of each pump unit checked before installation in the pump housing and only Pump units or suction valve units are installed, whose suction valve opening pressures are within a predetermined Pressure interval.

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)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
EP00100847A 1999-01-21 2000-01-17 Méthode de montage Expired - Lifetime EP1022460B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19902259 1999-01-21
DE19902259A DE19902259B4 (de) 1999-01-21 1999-01-21 Montageverfahren

Publications (3)

Publication Number Publication Date
EP1022460A2 true EP1022460A2 (fr) 2000-07-26
EP1022460A3 EP1022460A3 (fr) 2000-12-27
EP1022460B1 EP1022460B1 (fr) 2004-03-24

Family

ID=7894934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00100847A Expired - Lifetime EP1022460B1 (fr) 1999-01-21 2000-01-17 Méthode de montage

Country Status (2)

Country Link
EP (1) EP1022460B1 (fr)
DE (2) DE19902259B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1357283A3 (fr) * 2002-04-23 2004-09-22 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007002729B3 (de) * 2007-01-18 2008-06-05 Siemens Ag Kraftstoffpumpe für Einspritzsysteme von Brennkraftmaschinen sowie Herstellungsverfahren hierfür
DE102007004605B4 (de) * 2007-01-30 2009-08-13 Continental Automotive Gmbh Hochdruckpumpe und Einspritzanlage für eine Brennkraftmaschine mit einer Hochdruckpumpe
DE102007030749A1 (de) 2007-07-02 2009-01-08 Robert Bosch Gmbh Ventilgesteuerte Hydropumpe
DE102007060262A1 (de) 2007-12-14 2009-06-18 Robert Bosch Gmbh Pumpenanordnung und Verfahren zu deren Ansteuerung
DE102008048450B4 (de) * 2008-09-23 2014-10-30 Continental Automotive Gmbh Saugventil für einen Zylinder der Kraftstoff-Hochdruckpumpe eines Common-Rail-Einspritzsystems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3800905A1 (de) * 1988-01-14 1989-07-27 Rexroth Mannesmann Gmbh Pumpe, insbesondere axialkolbenpumpe
DE4027794C2 (de) * 1990-09-01 2002-06-20 Continental Teves Ag & Co Ohg Hydraulische Radialkolbenpumpe
DE4228357A1 (de) * 1992-08-26 1994-03-03 Zahnradfabrik Friedrichshafen Radialkolbenpumpe
US5701873A (en) * 1993-11-08 1997-12-30 Eidgenoessische Technische Hochschule Laboratorium Fuer Verbrennungsmotoren Und Verbrennungstechnik Control device for a filling-ratio adjusting pump
WO1995025887A1 (fr) * 1994-03-23 1995-09-28 Siemens Aktiengesellschaft Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1357283A3 (fr) * 2002-04-23 2004-09-22 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
US6959694B2 (en) 2002-04-23 2005-11-01 Robert Bosch Gmbh Fuel injection system for an internal combustion engine

Also Published As

Publication number Publication date
DE19902259A1 (de) 2000-07-27
EP1022460A3 (fr) 2000-12-27
EP1022460B1 (fr) 2004-03-24
DE19902259B4 (de) 2006-02-23
DE50005753D1 (de) 2004-04-29

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