EP1247977A1 - Système d'alimentation en carburant - Google Patents

Système d'alimentation en carburant Download PDF

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Publication number
EP1247977A1
EP1247977A1 EP02006057A EP02006057A EP1247977A1 EP 1247977 A1 EP1247977 A1 EP 1247977A1 EP 02006057 A EP02006057 A EP 02006057A EP 02006057 A EP02006057 A EP 02006057A EP 1247977 A1 EP1247977 A1 EP 1247977A1
Authority
EP
European Patent Office
Prior art keywords
fuel
pressure
pump
fuel pump
flow
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.)
Withdrawn
Application number
EP02006057A
Other languages
German (de)
English (en)
Inventor
Helmut Rembold
Mathias Schumacher
Uwe Mueller
Rainer Wilms
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 EP1247977A1 publication Critical patent/EP1247977A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a fuel system for Supply of fuel for an internal combustion engine, with a reservoir, a first fuel pump, which is connected on the input side to the storage container, one second fuel pump, which on the input side via a Fuel connection with the first fuel pump is connected to a pressure setting device for the output side of the second fuel pump and with a Pressure damping device, which in the Fuel connection between the first and second Fuel pump is arranged.
  • Such a fuel system is from DE 195 39 885 A1 known.
  • the second fuel pump it is one of the internal combustion engine powered high pressure fuel pump.
  • This high pressure fuel pump promotes the fuel under very high Pressure in a fuel rail (also "rail” called).
  • the fuel gets at least an injector. This is the fuel finally injected into the combustion chamber.
  • the number of injectors is equal to the number of Cylinder of the internal combustion engine.
  • the fuel system can be built so that the fuel injector injected directly into a combustion chamber of the internal combustion engine.
  • the pressure in the fuel rail that is output pressure of the high pressure fuel pump set by a pressure setting device.
  • a pressure setting device that is output pressure of the high pressure fuel pump set by a pressure setting device.
  • a volume control valve whose Input side with the outlet of the high pressure fuel pump is connected, and its output side in turn with the High pressure fuel pump inlet is connected.
  • the fuel from Outlet of the high pressure fuel pump to its entrance conveyed back. So only a small amount or also no fuel at all to the fuel manifold.
  • a Pressure damper arranged, which is usually a piston comprises, which is biased by a spring. At a short-term pressure increase, the piston is against the Spring loading moves and thereby the Pressure vibration damped.
  • This task is the beginning of a fuel system mentioned kind in that in the Fuel connection between the first and second Fuel pump, close to the second fuel pump and seen in the direction of flow before a confluence of the Pressure setting device, a flow barrier arranged which is a flow only towards the second Allows fuel pump.
  • the cost of the Fuel system according to the invention to a significant extent depends on the quality of the components used. So far was essentially in the entire fuel system, so too in the area between the first fuel pump and the second Fuel pump, which is usually a lower one Fuel pressure (approx. 4 bar) prevails than in the area output side of the second fuel pump, the use of such components required which high pressures survive undamaged. This was because that care had to be taken to ensure that the Pressure damper fails due to a technical error.
  • the measure according to the invention now ensures that that even if the pressure damper fails, none or at least no such strong pressure pulsations starting from the second fuel pump in the between first fuel pump and second fuel pump lying area of the fuel system can.
  • the pressure pulsations always go with you short flow impulse, which from the second Fuel pump directed towards the first fuel pump is.
  • the flow barrier according to the invention prevents fuel from the second fuel pump can flow to the first fuel pump.
  • Fuel system includes the second fuel pump 1-cylinder piston pump.
  • a 1-cylinder piston pump is usually directly from the internal combustion engine driven.
  • the pressure pulsations generated are particularly pronounced.
  • the Measure according to the invention thus leads to a particularly high cost savings.
  • the flow barrier may include a check valve. This can be used, for example, as a ball check valve be trained. Such a check valve is one extremely inexpensive flow barrier.
  • a complete lock towards the second Fuel pump to the first fuel pump could be too a very heavy load on the "high pressure components" lead, i.e. those components which are downstream of the Flow barrier. These include, for example second fuel pump itself, the pressure setting device etc. Also a possibly existing pressure damper in such a case could be exposed to stress, that reduce its lifespan.
  • a fuel system as a whole carries that Reference number 10. It comprises a low-pressure region 12 and a high pressure area 14.
  • the low pressure region 12 comprises a storage container 16, in which fuel 18 is stored.
  • the fuel 18 is from the reservoir 16 by a first Fuel pump 20 promoted. This is about an electric fuel pump.
  • the electrical Fuel pump 20 delivers into a low pressure fuel line 22. In this is near the Electric fuel pump 20, a filter 24 is arranged.
  • Branch line 26 which leads to the reservoir 16 returns.
  • a Pressure relief valve 28 arranged in the branch line 26.
  • the low pressure fuel line 22 leads to a second one Fuel pump 30. This will not be discussed here explained way of the camshaft one Internal combustion engine (not shown) driven. Upstream of the high pressure pump 30 are in the Low-pressure fuel line 22 still has a pressure damper 32 and a check valve 34 is arranged.
  • the high-pressure pump 30 pumps into a Fuel line 36, which via a check valve 38 leads to a fuel rail 40.
  • a fuel rail 40 This will also referred to as "rail".
  • fuel injection valves 42 are connected, which the fuel in a not shown Inject the combustion chamber of the internal combustion engine.
  • the pressure in the fuel rail 40 is from a pressure sensor 44 recorded.
  • a pressure relief valve 46 is provided to overpressure in the fuel rail 40 to avoid which the Functionality of the injection valves 42 is at the fuel rail 40 . This is fluidly in turn with the low pressure fuel line 22 connected.
  • the pressure in the fuel line 36 and the fuel rail 40, that is in the high pressure region 14 of the Fuel system 10 is a quantity control valve 48th controlled.
  • the quantity control valve 48 connects the High pressure area 14 before the check valve 38 with the between the check valve 34 and the pressure damper 32 area of the low-pressure fuel line 22.
  • From the high pressure pump 30 leads to a leakage line 50
  • Branch line 52 which in turn leads to reservoir 16 leads.
  • branch line 52 is over the pressure regulator 54, which the pressure in the low pressure range 12 of the fuel system 10 at a desired value holds constant with the low pressure fuel line 22nd connected.
  • a flow barrier 56 arranged by the pressure damper 32 is designed as a check valve.
  • the Check valve 56 only allows flow in the direction of the electric fuel pump 20 to the high pressure pump 30 towards.
  • Parallel to the check valve 56 is one Bypass line 58 is provided, in turn a Flow throttle 60 is arranged.
  • the high pressure pump 30 is a 1-piston pump. Their basic structure is in Figs. 2a - 2c (for reasons of clarity, the Fig. 2b and 2c not all reference numerals entered). She includes a piston 62 which is one of the Internal combustion engine driven camshaft 64 in axial Direction is moved. The piston 62 is in one Pump housing 66 performed. Above the piston 62 is in Pump housing 66 a pump chamber 68 available.
  • the pump chamber 68 On the inlet side, the pump chamber 68 is over the Check valve 34 with the low pressure fuel line 22 connected.
  • the high-pressure pump 30 delivers on the output side via the check valve 38 into the high-pressure fuel line 36.
  • the pump room 68 is also about that Flow control valve 48 with the low pressure fuel line 22 connectable.
  • the quantity control valve 48 is concerned is a solenoid valve, the magnet 70 on an armature 72 acts against the force via a piston rod 74 a spring 76 a valve member 78 on a valve seat 80 can press.
  • FIG. 2a shows the high pressure pump 30 during a suction stroke.
  • the piston 62 moves downward, so that the Pump chamber 68 via the check valve 34 from the Low pressure fuel line 22 filled with fuel becomes.
  • Fig. 3a shows the volume control valve 48.
  • the piston 62 moves again above (see also Fig. 3b). This is called the delivery stroke referred to (Fig. 2b).
  • the check valve 34 is also as the volume control valve 48 still closed.
  • the one located in the pump chamber 68 Compressed fuel and via the check valve 38 in the high pressure fuel line 36 ejected.
  • the quantity control valve 48 is based on that of the pressure sensor 44 delivered pressure signals from a not shown Control and regulation unit controlled so that in the Fuel rail 40 there is a desired pressure. This happens because towards the end of the production stroke Volume control valve 48 is opened. This is in Fig. 2c shown.
  • the fuel compressed in the pump chamber 68 can abruptly into the Low pressure fuel line 22 escape. This leads to the low pressure fuel line 22 to a pressure surge, which is also referred to as a "tax surge". In accordingly, it also comes in during the suction stroke the low pressure fuel line 22 to a certain Pressure reduction.
  • the pressure difference in the low pressure fuel line 22 between the minimum pressure during the suction stroke of the High pressure pump 30 and the maximum pressure at one Tax surge can be up to 15 bar. With yourself in Normally, the piston 62 moves quickly up and down High-pressure pump 30 therefore occurs in the inlet area of the High pressure pump 30 for high pressure pulsations Pressure gradient. These are usually handled by the Pressure damper 32 caught. When interpreting the However, fuel system 10 is too take into account that the pressure damper 32 due to a Error no longer the required pressure damping Can provide. However, in order to Low pressure area 12 of the fuel system 10 located Components safe from the pressure pulsations To protect the high pressures caused are on the one hand check valve 56 and, on the other hand, throttle 60 intended.
  • check valves 56 and flow restrictor 60 preferably as close as possible arranged the high pressure pump 30. Not in one illustrated embodiment, they are directly in the Connection piece of the high pressure pump 30 integrated.
  • the oversight the bypass line 58 with the throttle 60 thus protects in Normal operation the pressure damper 32 and reduced at one Failure of the pressure damper 32 the load on the High pressure pump 30, without the other hand, the Low pressure area 12 arranged components of the Expose the fuel system to high pressure pulsations.

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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)
EP02006057A 2001-03-28 2002-03-16 Système d'alimentation en carburant Withdrawn EP1247977A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10115324A DE10115324A1 (de) 2001-03-28 2001-03-28 Kraftstoffsystem
DE10115324 2001-03-28

Publications (1)

Publication Number Publication Date
EP1247977A1 true EP1247977A1 (fr) 2002-10-09

Family

ID=7679407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006057A Withdrawn EP1247977A1 (fr) 2001-03-28 2002-03-16 Système d'alimentation en carburant

Country Status (4)

Country Link
US (1) US20020170539A1 (fr)
EP (1) EP1247977A1 (fr)
JP (1) JP2002317729A (fr)
DE (1) DE10115324A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830050A1 (fr) * 2001-09-21 2003-03-28 Bosch Gmbh Robert Procede et dispositif de diagnostic d'un amortisseur de pression dans un systeme de dosage de carburant d'un moteur a combustion interne
WO2012059268A1 (fr) * 2010-11-03 2012-05-10 Robert Bosch Gmbh Système d'injection de carburant et procédé pour remplir et/ou purger un système d'injection de carburant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10210152A1 (de) * 2002-03-07 2003-09-18 Volkswagen Ag Kraftstoffversorgung für eine Brennkraftmaschine
DE10260750A1 (de) * 2002-12-23 2004-07-08 Robert Bosch Gmbh Kraftstoffpumpvorrichtung
CN100432416C (zh) * 2005-12-28 2008-11-12 奇瑞汽车股份有限公司 汽油机高压油轨总成
JP4911193B2 (ja) * 2009-04-28 2012-04-04 株式会社デンソー 内燃機関の排気浄化システム
DE102009046825A1 (de) * 2009-11-18 2011-05-19 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung eines Mengensteuerventils
DE112011105711B4 (de) * 2011-10-06 2019-05-23 Toyota Jidosha Kabushiki Kaisha Steuervorrichtung für Maschine mit interner Verbrennung
CN102425516B (zh) * 2011-11-03 2014-04-16 北京理工大学 多阀喷油***以及喷油方法
EP2647827B1 (fr) * 2012-04-05 2015-06-10 Delphi International Operations Luxembourg S.à r.l. Ensemble de soupape non-retour
DE102012208351A1 (de) 2012-05-18 2013-11-21 Robert Bosch Gmbh Niederdruckkreislauf für ein Kraftstoffeinspritzsystem, Kraftstoffeinspritzsystem
US20130312706A1 (en) * 2012-05-23 2013-11-28 Christopher J. Salvador Fuel system having flow-disruption reducer
DE102014202102A1 (de) * 2013-02-12 2014-08-14 Ford Global Technologies, Llc Direkteinspritzungskraftstoffpumpe
US9429124B2 (en) * 2013-02-12 2016-08-30 Ford Global Technologies, Llc Direct injection fuel pump
US9422898B2 (en) * 2013-02-12 2016-08-23 Ford Global Technologies, Llc Direct injection fuel pump
US9599082B2 (en) * 2013-02-12 2017-03-21 Ford Global Technologies, Llc Direct injection fuel pump
US9316161B2 (en) 2014-04-02 2016-04-19 Ford Global Technologies, Llc High pressure fuel pumps with mechanical pressure regulation
US9683512B2 (en) 2014-05-23 2017-06-20 Ford Global Technologies, Llc Pressure device to reduce ticking noise during engine idling
US9546628B2 (en) 2014-12-02 2017-01-17 Ford Global Technologies, Llc Identifying fuel system degradation
US10094319B2 (en) 2014-12-02 2018-10-09 Ford Global Technologies, Llc Optimizing intermittent fuel pump control
US9726105B2 (en) 2014-12-02 2017-08-08 Ford Global Technologies, Llc Systems and methods for sensing fuel vapor pressure
US9771909B2 (en) 2014-12-02 2017-09-26 Ford Global Technologies, Llc Method for lift pump control
JP6243834B2 (ja) * 2014-12-22 2017-12-06 ヤンマー株式会社 内燃機関の燃料供給装置
JP6584520B2 (ja) * 2015-09-30 2019-10-02 日立オートモティブシステムズ株式会社 高圧燃料ポンプ及び制御装置
ITUA20163392A1 (it) * 2016-05-12 2017-11-12 Magneti Marelli Spa Metodo di controllo di una pompa carburante per un sistema di iniezione diretta
DE102022210406A1 (de) 2022-09-30 2024-04-04 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Detektieren eines Defekts einer Pulsationsdämpfungseinrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474158A (en) * 1981-11-11 1984-10-02 Lucas Industries Public Limited Company Liquid fuel pumping apparatus
EP0299337A2 (fr) * 1987-07-08 1989-01-18 IVECO FIAT S.p.A. Système d'injection de carburant pour un moteur à combustion interne
EP0682177A1 (fr) * 1994-05-13 1995-11-15 Nippondenso Co., Ltd. Pompe d'injection de carburant à pulsation réduite de refluse de carburant
DE19507295A1 (de) * 1995-03-02 1996-09-05 Rexroth Mannesmann Gmbh Radialkolbenpumpe, insbesondere Kraftstoffpumpe für einen Verbrennungsmotor
DE19539885A1 (de) 1995-05-26 1996-11-28 Bosch Gmbh Robert Kraftstoffversorgungsanlage und Verfahren zum Betreiben einer Brennkraftmaschine
US5701873A (en) * 1993-11-08 1997-12-30 Eidgenoessische Technische Hochschule Laboratorium Fuer Verbrennungsmotoren Und Verbrennungstechnik Control device for a filling-ratio adjusting pump
DE19630938A1 (de) * 1996-07-31 1998-02-05 Siemens Ag Kraftstoffzuleitung mit einem Volumenstromregelventil und Volumenstromregelventil
DE19939422A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474158A (en) * 1981-11-11 1984-10-02 Lucas Industries Public Limited Company Liquid fuel pumping apparatus
EP0299337A2 (fr) * 1987-07-08 1989-01-18 IVECO FIAT S.p.A. Système d'injection de carburant pour un moteur à combustion interne
US5701873A (en) * 1993-11-08 1997-12-30 Eidgenoessische Technische Hochschule Laboratorium Fuer Verbrennungsmotoren Und Verbrennungstechnik Control device for a filling-ratio adjusting pump
EP0682177A1 (fr) * 1994-05-13 1995-11-15 Nippondenso Co., Ltd. Pompe d'injection de carburant à pulsation réduite de refluse de carburant
DE19507295A1 (de) * 1995-03-02 1996-09-05 Rexroth Mannesmann Gmbh Radialkolbenpumpe, insbesondere Kraftstoffpumpe für einen Verbrennungsmotor
DE19539885A1 (de) 1995-05-26 1996-11-28 Bosch Gmbh Robert Kraftstoffversorgungsanlage und Verfahren zum Betreiben einer Brennkraftmaschine
DE19630938A1 (de) * 1996-07-31 1998-02-05 Siemens Ag Kraftstoffzuleitung mit einem Volumenstromregelventil und Volumenstromregelventil
DE19939422A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830050A1 (fr) * 2001-09-21 2003-03-28 Bosch Gmbh Robert Procede et dispositif de diagnostic d'un amortisseur de pression dans un systeme de dosage de carburant d'un moteur a combustion interne
WO2012059268A1 (fr) * 2010-11-03 2012-05-10 Robert Bosch Gmbh Système d'injection de carburant et procédé pour remplir et/ou purger un système d'injection de carburant

Also Published As

Publication number Publication date
JP2002317729A (ja) 2002-10-31
US20020170539A1 (en) 2002-11-21
DE10115324A1 (de) 2002-10-17

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