WO2002055872A1 - Systeme d'injection de carburant - Google Patents

Systeme d'injection de carburant Download PDF

Info

Publication number
WO2002055872A1
WO2002055872A1 PCT/DE2001/004800 DE0104800W WO02055872A1 WO 2002055872 A1 WO2002055872 A1 WO 2002055872A1 DE 0104800 W DE0104800 W DE 0104800W WO 02055872 A1 WO02055872 A1 WO 02055872A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
injection
pressure
fuel injection
nozzle
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/DE2001/004800
Other languages
German (de)
English (en)
Inventor
Hans-Christoph Magel
Bernd Mahr
Martin Kropp
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 WO2002055872A1 publication Critical patent/WO2002055872A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves

Definitions

  • the invention relates to a fuel injection device according to the preamble of patent claim 1.
  • the fuel injection device is designed to be pressure-controlled.
  • a pressure-controlled fuel injection device is understood to mean that a valve member is moved against the action of a closing force (spring) by the fuel pressure prevailing in the nozzle chamber of an injector, so that the injection opening is released for an injection of fuel from the nozzle chamber into the cylinder becomes.
  • the pressure with which fuel emerges from the nozzle chamber into a cylinder of an internal combustion engine is referred to as the injection pressure, while a system pressure is understood to mean the pressure under which fuel is available or is stored within the fuel injection device.
  • Fuel metering means providing a defined amount of fuel for injection.
  • Leakage is an amount of fuel that is generated during operation of the fuel injector (e.g. a guide leak), is not used for injection and is returned to the fuel tank.
  • the pressure level of this leakage can have a standing pressure, the fuel then being expanded to the pressure level of the fuel tank.
  • the injection pressure can be adapted to the load and speed.
  • a pre-injection is often carried out here to reduce noise.
  • Pressure-controlled injection is known to be cheap for reducing emissions.
  • Fuel injection system does not require a common pressure storage space or pressure control.
  • Fuel pump, preferably a cam pump, and control valves can be combined into a pre-assembled and tested unit. This further reduces the cost of the fuel injector.
  • Metering valves can be controlled with magnetic actuators or piezo actuators. Pressure-balanced valves with piezo actuators are preferably used.
  • An optional servo control of the valves is an advantage.
  • a simple nozzle, a two-spring nozzle holder or a rate-shaping nozzle can be used as the nozzle.
  • a vario or a vario register nozzle can also be used. This leads to an improved adaptation of the injection process to the requirements of the engine.
  • Fig. 2 shows a second pressure-controlled fuel injection device.
  • a pressure-controlled fuel injection device 1 shown in FIG. 1, the high-pressure generation takes place via a Cam pump 2, the delivery stroke of which is synchronized with the injection window of the engine.
  • the compressed fuel is then metered into the injection nozzles 4 through valves 3.
  • FIG. 1 only an injection nozzle 4 and a valve 3 are shown.
  • Each injection nozzle 4 per cylinder is assigned a metering valve.
  • a high-pressure line 5 connects the 3/2-way valve 3 and the injection nozzle 4.
  • the injection is pressure-controlled, similar to that in distributor injection systems.
  • a nozzle needle 6 opens at a certain pressure prevailing in the nozzle chamber 7 against the spring force of a spring 8.
  • the spring chamber 9 of the injection nozzle 4 is connected to the leakage line 10.
  • the metering is carried out using the 3/2-way valve 3.
  • the valve 3 When the valve 3 is not energized, the nozzle chamber 7 of the injection nozzle 4 is connected to a leakage line 11 and, when the valve 3 is energized, to the cam pump 2.
  • the valves 3 can be integrated in the cam pump 2.
  • the cam pump 2 delivers fuel and builds up pressure.
  • the fuel is only passed on to the injection nozzle 4 and injected by opening the valve 3.
  • the injection is controlled electronically via the valves 3.
  • the pressure line 5 can be relieved via the leakage line 11.
  • an overpressure valve 12 is provided.
  • a spray adjuster such as is used in distributor injection systems, is advantageous in order to facilitate the synchronization of cam stroke and injection duration.
  • the pressure at the start of the injection can be influenced by a time offset between the start of delivery of the pump stroke and the start of injection. Possibly. a smaller compensation space must be provided between the pump and valves. A variable injection pressure can thus be achieved in the map.
  • Cam pump 2, pressure relief valve 12 and metering valve 3 are to be understood as a preassembled unit 13.
  • the fuel injection device 1 consists of the units 1 3 and 4. The division into modules can be implemented differently in other embodiments.
  • FIG. 2 shows an exemplary embodiment of a fuel injection device 14 in which the metering is controlled with a 2/2 valve 15.
  • the necessary relief of the high pressure line 5 and the injector 4 after the injection takes place via Diverter throttles 16.
  • these can be mounted differently on the injection nozzle or on the metering valve 15.

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 (1) commandé par pression, comprenant un injecteur (4) par cylindre, une pompe à carburant (2) servant à acheminer le carburant à l'injecteur (4) et une soupape de dosage (3) servant à commander l'injecteur (4). Une pompe à carburant commune (2) est reliée directement à l'injecteur (4) par l'intermédiaire d'une soupape de dosage (3).
PCT/DE2001/004800 2001-01-12 2001-12-19 Systeme d'injection de carburant Ceased WO2002055872A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10101107.5 2001-01-12
DE2001101107 DE10101107A1 (de) 2001-01-12 2001-01-12 Kraftstoffeinspritzeinrichtung

Publications (1)

Publication Number Publication Date
WO2002055872A1 true WO2002055872A1 (fr) 2002-07-18

Family

ID=7670309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/004800 Ceased WO2002055872A1 (fr) 2001-01-12 2001-12-19 Systeme d'injection de carburant

Country Status (2)

Country Link
DE (1) DE10101107A1 (fr)
WO (1) WO2002055872A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005248803A (ja) * 2004-03-03 2005-09-15 Toyota Motor Corp 内燃機関の燃料噴射装置
DE102006006823B3 (de) * 2006-02-14 2007-03-15 Siemens Ag Verfahren und Vorrichtung zum Einspritzen von Kraftstoff

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58214666A (ja) * 1982-06-09 1983-12-13 Mitsuwa Seiki Co Ltd 内燃機関の燃料供給装置
DE3436768A1 (de) * 1984-10-06 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur steuerung der kraftstoffeinspritzung bei brennkraftmaschinen und kraftstoffeinspritzsystem zur durchfuehrung des verfahrens
EP0462404A1 (fr) * 1990-06-20 1991-12-27 Robert Bosch Gmbh Système d'injection de combustible pour moteurs à combustion interne
GB2310889A (en) * 1996-03-05 1997-09-10 Lucas Ind Plc Fuel supply system for solenoid-actuated fuel injectors
WO1998049442A1 (fr) * 1997-04-25 1998-11-05 Robert Bosch Gmbh Systeme d'injection de carburant
DE19835494A1 (de) * 1998-08-06 2000-02-10 Bosch Gmbh Robert Pumpe-Düse-Einheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58214666A (ja) * 1982-06-09 1983-12-13 Mitsuwa Seiki Co Ltd 内燃機関の燃料供給装置
DE3436768A1 (de) * 1984-10-06 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur steuerung der kraftstoffeinspritzung bei brennkraftmaschinen und kraftstoffeinspritzsystem zur durchfuehrung des verfahrens
EP0462404A1 (fr) * 1990-06-20 1991-12-27 Robert Bosch Gmbh Système d'injection de combustible pour moteurs à combustion interne
GB2310889A (en) * 1996-03-05 1997-09-10 Lucas Ind Plc Fuel supply system for solenoid-actuated fuel injectors
WO1998049442A1 (fr) * 1997-04-25 1998-11-05 Robert Bosch Gmbh Systeme d'injection de carburant
DE19835494A1 (de) * 1998-08-06 2000-02-10 Bosch Gmbh Robert Pumpe-Düse-Einheit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 064 (M - 285) 27 March 1984 (1984-03-27) *

Also Published As

Publication number Publication date
DE10101107A1 (de) 2002-07-25

Similar Documents

Publication Publication Date Title
EP1078160B1 (fr) Systeme d'injection de carburant
EP1125058B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1125049B1 (fr) Procede et systeme d'injection de carburant combinee par levee/pression pour moteur a combustion interne
DE19939420B4 (de) Kraftstoffeinspritzverfahren und -system für eine Brennkraftmaschine
EP1273797B1 (fr) Dispositif d'injection de combustible
EP1123463B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1121527B1 (fr) Dispositif d'injection de carburant
DE19939424A1 (de) Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE19939425B4 (de) Kraftstoffeinspritzsystem für eine Brennkraftmaschine
EP1354133B1 (fr) Dispositif d'injection de carburant
EP1534950A1 (fr) Dispositif d'injection de carburant
DE4407052C1 (de) Einspritzanlage für die Einspritzung eines Kraftstoffs und einer Zusatzflüssigkeit in die Brennräume einer Brennkraftmaschine
WO2002055868A1 (fr) Unite d'injection par accumulation de pression
DE10057683B4 (de) Kraftstoffeinspritzeinrichtung
WO2002055872A1 (fr) Systeme d'injection de carburant
DE19942291A1 (de) Kraftstoffeinspritzventil für eine Brennkraftmaschine
EP0656473B1 (fr) Méthode d'injection de combustible pour un moteur à combustion interne avec injection à haute pression
DE10054526A1 (de) Einspritzdüse
DE10123993A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
EP1125044B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
EP1313945B1 (fr) Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne et procede pour commander l'ouverture et la fermeture d'une aiguille d'une soupape d'injection
DE19954206A1 (de) Kraftstoffeinspritzsystem
WO2005031154A1 (fr) Element pour dispositif d'injection de carburant de moteur a combustion interne et dispositif d'injection de carburant
DE10128283A1 (de) Kraftstoffeinspritzeinrichtung
DE19834763A1 (de) Pumpe-Leitung-Düse-System

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP