WO2009021863A1 - Système d'injection de carburant - Google Patents

Système d'injection de carburant Download PDF

Info

Publication number
WO2009021863A1
WO2009021863A1 PCT/EP2008/060158 EP2008060158W WO2009021863A1 WO 2009021863 A1 WO2009021863 A1 WO 2009021863A1 EP 2008060158 W EP2008060158 W EP 2008060158W WO 2009021863 A1 WO2009021863 A1 WO 2009021863A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
pressure
injection system
damping device
fuel injection
Prior art date
Application number
PCT/EP2008/060158
Other languages
German (de)
English (en)
Inventor
Achim Koehler
Andreas Kellner
Stefan Kieferle
Heiko Naujoks
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 WO2009021863A1 publication Critical patent/WO2009021863A1/fr

Links

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M63/0265—Pumps feeding common rails

Definitions

  • the invention relates to a fuel injection system for an internal combustion engine, comprising a high-pressure pump which comprises at least one pump element, is sucked by the fuel from a low pressure region, subjected to high pressure and conveyed into a high-pressure region, and with at least one volumetric compensating and / or damping device in the low pressure range.
  • the object of the invention is to further optimize the fuel injection system according to the preamble of claim 1.
  • the object is with a fuel injection system for an internal combustion engine, with a high-pressure pump, which comprises at least one pump element, sucked by the fuel from a low pressure region, pressurized and conveyed into a high-pressure region, and with at least one volumetric compensation and / or Damping device in the low pressure range, achieved in that the volumetric compensating and / or damping device is provided in or on a housing of the high-pressure fuel pump.
  • a high-pressure pump which comprises at least one pump element, sucked by the fuel from a low pressure region, pressurized and conveyed into a high-pressure region, and with at least one volumetric compensation and / or Damping device in the low pressure range, achieved in that the volumetric compensating and / or damping device is provided in or on a housing of the high-pressure fuel pump.
  • the pump element comprises a pump piston which is mechanically driven by a drive shaft.
  • a suction stroke of the pump piston fuel is sucked via a suction valve, which is also referred to as an inlet valve in an element space, acted upon by the pump piston with high pressure and promoted via a high pressure valve in a fuel manifold, which is also referred to as a rail.
  • a preferred embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensating and / or damping device is arranged in an engine compartment of the high-pressure fuel pump.
  • a cam of a camshaft is arranged, which drives one or more pump pistons.
  • a further preferred exemplary embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensating and / or damping device is arranged in front of an inlet valve of the high-pressure fuel pump.
  • the compensating and / or damping device can be integrated, for example, in a receiving space for the inlet valve.
  • a further preferred embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensating and / or damping device - A -
  • the equalizing and connecting channel is arranged in the housing of the high-pressure fuel pump.
  • a further preferred exemplary embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensating and / or damping device comprises a diaphragm accumulator, a piston / spring element and / or a bellows.
  • the volumetric compensating and / or damping device is screwed, for example, as a separate component to the housing of the high-pressure fuel pump.
  • a further preferred embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensation and / or damping device comprises a throttle device.
  • the throttle device is preferably integrated in the housing of the high-pressure fuel pump.
  • a further preferred exemplary embodiment of the fuel injection system is characterized in that the or at least one further volumetric compensating and / or damping device comprises an overflow channel and / or an overflow cross section.
  • the overflow channel and / or overflow cross section is preferably integrated in the housing of the high-pressure fuel pump.
  • the or at least one further volumetric compensating and / or damping device comprises at least one compensating volume.
  • the compensating volume is preferably integrated in the housing of the high-pressure fuel pump, but may also be attached to the housing.
  • a further preferred embodiment of the fuel injection system is characterized in that the high-pressure fuel pump has a plurality of pump elements, each comprising an element space with a pump piston, wherein a plurality of volumetric compensating and / or damping devices are provided in or on the housing of the high-pressure fuel pump , This ensures that back-propagated quantity waves propagate at most significantly weakened in the low pressure range.
  • each pump element is associated with at least one volumetric compensation and / or damping device.
  • FIG. 1 shows a hydraulic circuit diagram of a fuel injection system with a high-pressure fuel pump and several volumes. Metric balancing and / or damping devices and the
  • Figures each one embodiment of a vo- 2 to 4 lumetric compensation and / or damping device.
  • FIG. 1 shows an embodiment of a fuel injection system 1 according to the invention with a high-pressure fuel pump 2 in the form of a hydraulic circuit diagram.
  • the high-pressure fuel pump 2 comprises a housing 3 and a metering unit 4, which serves to adjust the flow rate of the high-pressure fuel pump 2.
  • a fuel inlet 5 the high-pressure fuel pump 2 is connected to a (not shown) tank. From the tank, the fuel is preferably conveyed by means of a prefeed pump via a pre-filter to the high-pressure fuel pump 2.
  • the high-pressure fuel pump 2 comprises two pump elements 8, 9, each with a pump piston.
  • the pump pistons of the pump elements 8, 9 are driven by a cam 10 of a camshaft.
  • the cam 10 is arranged in an engine room 11 of the high-pressure fuel pump 2.
  • the camshaft is part of the high-pressure fuel pump 2 and is driven by an internal combustion engine (not shown).
  • the fuel is subjected to high pressure in the delivery stroke of the pump piston.
  • the high pressure fuel passes through high pressure lines 17, 18, in each of which a high pressure valve is arranged, as indicated by arrows 19, 20, in a fuel collecting line, which is also referred to as a rail.
  • the high pressure lines 17, 18 with the high pressure valves and the rail are subjected to high pressure. Therefore, the associated area is also referred to as high-pressure area 21.
  • the plunger chambers (not shown) are connected to one another via a compensating and / or connecting channel 22.
  • the cam 10 is part of a drive shaft, which is rotatably mounted on both sides of the cam in a first bearing 24 and a second bearing 25 in the housing 3.
  • the drive shaft is arranged in an interior of the pump housing 3.
  • the bearings 24, 25 of the drive shaft are designed as plain bearings and forced flows through with fuel.
  • the bearings 24, 25 may be designed as throttles.
  • the bearing 24 may be preceded by a further throttle 26.
  • Further throttles 27, 28 may be in the return 15 or in the return run 5 be arranged.
  • a volumetric compensating and / or damping device 31 can be arranged in the return 15.
  • Another volumetric compensating and / or damping device 32 may be arranged in the fuel inlet 5.
  • volumetric compensating and / or damping devices 41 to 44 are arranged in the pump housing 2 or on the pump housing 2.
  • the volumetric compensating and / or damping devices 41 to 44 are, for example, a diaphragm accumulator 51, as shown in FIG. 2, around a piston / spring element 52, as shown in FIG. 3, or in FIG a bellows 53, as shown in Figure 4.
  • volumetric compensation and / or damping devices in or on the housing 3 of the high-pressure fuel pump 2 provides, inter alia, the following advantages: compensation of the pulsations (volume waves); lower pressure load on all low-pressure components; lower acoustic stimulation, less noise excitation; better filling; constant flow through the pump; less cavitation.
  • the balancing and / or damping device 41 is assigned to the engine compartment 11.
  • the volumetric balancing or damping devices 42, 44 are each associated with one of the intake valves 12, 13.
  • the volumetric compensation and / or Damping device 43 is assigned to the equalizing and / or connecting channel 22.

Landscapes

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

Abstract

L'invention concerne un système d'injection de carburant pour un moteur à combustion interne, comprenant : une pompe de carburant à haute pression qui comprend au moins un élément de pompe (8, 9) par lequel du carburant est aspiré dans une zone à basse pression (14), sollicité par une haute pression et refoulé dans une zone à haute pression (21); et au moins un dispositif (31, 32; 41-44) de compensation et/ou d'amortissement volumétrique dans la zone à basse pression. Selon l'invention, afin d'optimiser le système d'injection de carburant, le dispositif (41-44) de compensation et/ou d'amortissement volumétrique est prévu dans ou sur un carter (3) de la pompe de carburant à haute pression (2).
PCT/EP2008/060158 2007-08-14 2008-08-01 Système d'injection de carburant WO2009021863A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007038426.4 2007-08-14
DE200710038426 DE102007038426A1 (de) 2007-08-14 2007-08-14 Kraftstoffeinspritzsystem

Publications (1)

Publication Number Publication Date
WO2009021863A1 true WO2009021863A1 (fr) 2009-02-19

Family

ID=40084259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/060158 WO2009021863A1 (fr) 2007-08-14 2008-08-01 Système d'injection de carburant

Country Status (2)

Country Link
DE (1) DE102007038426A1 (fr)
WO (1) WO2009021863A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130312706A1 (en) * 2012-05-23 2013-11-28 Christopher J. Salvador Fuel system having flow-disruption reducer

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010027958A1 (de) * 2010-04-20 2011-10-20 Robert Bosch Gmbh Pumpenanordnung
DE102012200708A1 (de) 2012-01-19 2013-07-25 Robert Bosch Gmbh Hochdruckpumpe und Verfahren zur Verringerung der Kavitationswirkung in einer Hochdruckpumpe
FR2998335B1 (fr) * 2012-11-16 2015-01-16 Renault Sas Dispositif antibruit destine a un element d'aspiration d'un circuit de carburant
DE102013218878A1 (de) * 2013-09-19 2015-03-19 Robert Bosch Gmbh Fluidfördersystem
DE102013218873A1 (de) * 2013-09-19 2015-03-19 Robert Bosch Gmbh Fluidfördersystem für ein Fluid
DE102013220807A1 (de) * 2013-10-15 2014-11-27 Continental Automotive Gmbh Pumpeneinheit für eine Hochdruckpumpe sowie Niederdruckdämpfer
DE102016201082B4 (de) * 2016-01-26 2017-10-05 Continental Automotive Gmbh Kraftstoffhochdruckpumpe
DE102017207991A1 (de) 2017-05-11 2018-11-15 Robert Bosch Gmbh Kraftstofffördereinrichtung für ein Kraftstoffeinspritzsystem sowie Kraftstoffeinspritzsystem
IT201800003341A1 (it) * 2018-03-07 2019-09-07 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10156732A1 (de) * 2001-11-19 2003-06-05 Bosch Gmbh Robert Hochdruckkraftstoffpumpe mit einer Einrichtung zur Dämpfung von Druckstößen
DE102005027851A1 (de) * 2005-06-16 2006-12-21 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine
EP1775459A1 (fr) * 2003-07-22 2007-04-18 Hitachi, Ltd. Mécanisme d'amortisseur pour une pompe à carburant haute pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10156732A1 (de) * 2001-11-19 2003-06-05 Bosch Gmbh Robert Hochdruckkraftstoffpumpe mit einer Einrichtung zur Dämpfung von Druckstößen
EP1775459A1 (fr) * 2003-07-22 2007-04-18 Hitachi, Ltd. Mécanisme d'amortisseur pour une pompe à carburant haute pression
DE102005027851A1 (de) * 2005-06-16 2006-12-21 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130312706A1 (en) * 2012-05-23 2013-11-28 Christopher J. Salvador Fuel system having flow-disruption reducer

Also Published As

Publication number Publication date
DE102007038426A1 (de) 2009-02-19

Similar Documents

Publication Publication Date Title
WO2009021863A1 (fr) Système d'injection de carburant
DE102004013307B4 (de) Kraftstoffhochdruckpumpe mit einem Druckbegrenzungsventil
EP3059439B1 (fr) Unite de pompe pour une pompe a haute pression
EP1119704B1 (fr) Ensemble pompe pour la production d'une haute pression de carburant
DE19801355B4 (de) Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
EP2640958B1 (fr) Circuit basse pression pour un système d'injection de carburant et système d'injection de carburant
EP2590834A1 (fr) Dispositif et véhicule ou engin de travail
DE102008000193A1 (de) Kraftstoffeinspritzpumpe
DE10117418A1 (de) Oszillierende Verdrängerpumpe
DE102010030852A1 (de) Hochdruckpumpe
EP3084200B1 (fr) Dispositif d'alimentation en carburant d'un système d'injection de carburant d'un moteur à combustion interne, ainsi que soupape de décharge associée
DE102004008478B4 (de) Fördermengenregelung einer Hochdruckpumpe
DE102008040833A1 (de) Kraftstoff-Fördereinrichtung für eine Brennkraftmaschine
DE19842021B4 (de) Vorrichtung zur Reduktion des Speisdruck-Pulsierens von Hochdruck-Treibstoffpumpen
DE102011006099A1 (de) Kraftstoffeinspritzsystem und Verfahren zur aktiven Pulsationsdämpfung im Niederdruckbereich eines Kraftstoffeinspritzsystems
DE102013224387A1 (de) Kraftstoffeinspritzsystem sowie Verfahren zum Betreiben eines Kraftstoffeinspritzsystems
EP3014119B1 (fr) Pompe
DE102015213322A1 (de) Kraftstoffeinspritzsystem
EP1022460B1 (fr) Méthode de montage
DE102007037084A1 (de) Kraftstoffhochdruckpumpe
WO2015039955A1 (fr) Système de transport de fluide
DE10210300B4 (de) Pumpenelement für eine Hochdruckpumpe und Hochdruckpumpe mit steuerbarer Fördermenge
DE102008041393A1 (de) Kraftstoffsystem für eine Brennkraftmaschine
EP2399030A1 (fr) Dispositif de limitation de débit d'une pompe et ensemble pompe muni d'un tel dispositif
WO2018166731A1 (fr) Dispositif d'alimentation pour système d'injection de carburant

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08786776

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08786776

Country of ref document: EP

Kind code of ref document: A1