EP1144843B1 - Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers - Google Patents

Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers Download PDF

Info

Publication number
EP1144843B1
EP1144843B1 EP00984824A EP00984824A EP1144843B1 EP 1144843 B1 EP1144843 B1 EP 1144843B1 EP 00984824 A EP00984824 A EP 00984824A EP 00984824 A EP00984824 A EP 00984824A EP 1144843 B1 EP1144843 B1 EP 1144843B1
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
actuator
injector according
injector
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.)
Expired - Lifetime
Application number
EP00984824A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1144843A1 (de
Inventor
Patrick Mattes
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 EP1144843A1 publication Critical patent/EP1144843A1/de
Application granted granted Critical
Publication of EP1144843B1 publication Critical patent/EP1144843B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M59/46—Valves
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion

Definitions

  • the invention relates to an injector for a Fuel injection system for internal combustion engines with a Pressure intensifier), a first in a first Guide bore guided first piston and one in one second guide bore guided second piston, wherein the first piston and the second piston a at least under a supply pressure pressure chamber limit, and with a leakage oil return and being the first Piston is actuated by an actuator and the second piston at least indirectly, the actuator of a control valve operated and a fuel injection system for Internal combustion engine according to the preamble of claim 12.
  • the second piston of the hydraulic pressure booster so far by a spring, For example, a plate spring, against the actuator of the Control valve pressed.
  • the invention is based on the object, an injector for a fuel injection system for internal combustion engines with a pressure intensifier with improved To provide operating behavior.
  • an injector for a fuel injection system for internal combustion engines with a pressure booster having a first guided in a first guide bore and a first piston guided in a second guide bore second piston, wherein the first piston and the second piston at least one Limit supply pressure standing pressure chamber, and with a leakage oil return, wherein the first piston is actuated by an actuator and the second piston at least indirectly actuates the actuator of a control valve, the second guide bore is hydraulically connected to the leak oil return and wherein the pressure p 1 in the leakage oil return less than the supply pressure.
  • control valve Due to the low pressure level in the injector directly after The control valve also improves the performance arranged between the control room and control valve Outlet throttle.
  • the first guide bore, the first piston and the housing in particular with a Bellows, sealed against the environment, so no Leaks arise and the supply pressure in the pressure chamber stays high.
  • the Supply pressure in the pressure chamber by a in the of Housing, bellows and first piston formed space opening supply line is provided so that all lines (31, 25, 27) and spaces (34, 17, 29) always be traversed by fuel.
  • a pressure-holding valve is arranged in the supply line, so that the pressure p 2 in the supply line, in particular to 50 bar, is limited.
  • Another embodiment has a recess on the second guide bore, which with the leakage oil return in Connection stands, so that the control and leakage quantities be easily stated.
  • the outlet side of the opens Control valve in the leak oil return, so that the Tax amount is dissipated.
  • the actuator a piezo actuator, so that large control forces are available.
  • Another embodiment provides the housing, the Control valve and the actuator in a holding body assemble, so that on the one hand manufacture and assembly be relieved and on the other hand a backlash-free and prestressed connection of the components is achieved.
  • a Inventive injector with a hydraulic Pressure Translator shown in a two-part housing 1 and 3 .
  • a first guide bore 5 and a second Guide bore 7 arranged coaxially with each other.
  • the second guide bore 7 carries a second piston 11 and a plunger 13.
  • the second piston 11 acts on the Plunger 13 on the spherical actuator 15 of the not illustrated control valve of the injector.
  • the first piston 9 and the second piston 11 define one Pressure chamber 17 of a hydraulic pressure booster 19.
  • the first piston 9 is a piezoelectric actuator 21 acts. If the Piezoactuator 21 is actuated, he presses the first piston. 9 in the direction of the arrow in the pressure chamber 17. Once the by increasing pressure in the pressure chamber 17 is sufficient to the in the pressure chamber 17 projecting end face of the second piston 11th to exert a hydraulic force that is greater than that hydraulic force, which is under control pressure
  • a supply line 31 in which a supply pressure p 2 prevails, indirectly supplies the pressure chamber 17 with fuel via a bore in the housing 1 and a bellows 33.
  • the housing 1 and the first piston 9 are sealed by the bellows 33 against the environment.
  • the supply line 31 opens into the space defined by the housing 1, the first piston 9 and bellows 33 space (34) and fills it with under pressure p 2 fuel.
  • Through the annular gap between the first guide bore 5 and the first piston 9 fuel passes into the pressure chamber 17, so that it is always filled with fuel and also at least approximately a pressure of the amount p 2 in the pressure chamber 17 prevails.
  • the bellows in contrast to the prior art, is only statically pressurized. This results in a possible indication of the supply pressure p 2 , without the bellows 33 having to be changed, and thus an increase in the bias voltage of the piezo actuator.
  • the supply pressure p 2 may be, for example, 50 bar.
  • the entire injector consisting of piezoelectric actuator 21, Pressure Translator 19 and the not shown Control valve and the actual injector are from a holding body 35 held together.
  • the from the Supply line 31 through the holding body 35 flowing Fuel is through two O-rings between Holding body 35 and housing 1 are arranged, it prevented to flow into the environment.
  • a pressure-holding valve 37th arranged, which ensures that in the Supply line 31 and the with the supply line 31 17 hydraulically related rooms Pressure intensifier 19 a permissible maximum pressure never is exceeded. As soon as this maximum pressure is reached opens, the pressure-holding valve 37.
  • the outlet side of Pressure holding valve 37 may, for example, with the Leakage oil return 25 in connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00984824A 1999-10-23 2000-10-12 Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers Expired - Lifetime EP1144843B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19951144 1999-10-23
DE19951144A DE19951144A1 (de) 1999-10-23 1999-10-23 Injektor für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen mit hydraulischer Vorspannung des Druckübersetzers
PCT/DE2000/003582 WO2001031192A1 (de) 1999-10-23 2000-10-12 Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers

Publications (2)

Publication Number Publication Date
EP1144843A1 EP1144843A1 (de) 2001-10-17
EP1144843B1 true EP1144843B1 (de) 2005-03-30

Family

ID=7926672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00984824A Expired - Lifetime EP1144843B1 (de) 1999-10-23 2000-10-12 Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers

Country Status (6)

Country Link
US (1) US6752324B1 (cs)
EP (1) EP1144843B1 (cs)
JP (1) JP2003513196A (cs)
CZ (1) CZ295497B6 (cs)
DE (2) DE19951144A1 (cs)
WO (1) WO2001031192A1 (cs)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10333697A1 (de) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE10333696A1 (de) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE10333695A1 (de) * 2003-07-24 2005-03-03 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102005026967B4 (de) * 2005-06-10 2014-09-25 Siemens Aktiengesellschaft Ventil, insbesondere Servoventil
JP2007255328A (ja) * 2006-03-23 2007-10-04 Toyota Motor Corp 噴射燃料増圧装置
JP4635980B2 (ja) * 2006-08-03 2011-02-23 トヨタ自動車株式会社 燃料供給システム
DE102007008262A1 (de) * 2007-02-20 2008-08-21 Robert Bosch Gmbh Kraftstoffeinspritzventil zur Kraftstoffeinspritzung in Brennkraftmaschinen
US8074625B2 (en) 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
US20140131466A1 (en) 2012-11-12 2014-05-15 Advanced Green Innovations, LLC Hydraulic displacement amplifiers for fuel injectors
WO2014144807A1 (en) * 2012-11-12 2014-09-18 Mcalister Technologies, Llc Systems and methods for providing motion amplification and compensation by fluid displacement
DE102014220890B4 (de) * 2014-10-15 2025-08-21 Schaeffler Technologies AG & Co. KG Einspritzventil zum Einspritzen von Fluid in einen Brennraum einer Brennkraftmaschine
DE102015226326A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Hydraulische Kopplereinrichtung und Kraftstoffeinspritzventil mit einer solchen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH434875A (de) 1966-06-21 1967-04-30 Huber Robert Brennstoff-Einspritzventil mit elektromagnetischer Betätigung
JPH0656162B2 (ja) 1987-03-03 1994-07-27 トヨタ自動車株式会社 ストロ−ク可変装置
US4899935A (en) * 1988-03-14 1990-02-13 Yamaha Hatsudoki Kabushiki Kaisha Valve support for accumulator type fuel injection nozzle
DE4336108C1 (de) * 1993-10-22 1994-12-01 Daimler Benz Ag Magnetvenitl an einer für Brennkraftmaschinen vorgesehenen Kraftstoffeinspritzdüse
US5641121A (en) * 1995-06-21 1997-06-24 Servojet Products International Conversion of non-accumulator-type hydraulic electronic unit injector to accumulator-type hydraulic electronic unit injector
US5823429A (en) * 1996-07-12 1998-10-20 Servojet Products International Hybrid hydraulic electronic unit injector
JP3823391B2 (ja) 1996-08-31 2006-09-20 いすゞ自動車株式会社 エンジンの燃料噴射装置
IT1293433B1 (it) 1997-07-11 1999-03-01 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna, e relativo metodo di registrazione.
DE19807903C2 (de) 1998-02-25 2001-11-29 Siemens Ag Vorrichtung und Verfahren zur Kraftübertragung

Also Published As

Publication number Publication date
WO2001031192A1 (de) 2001-05-03
CZ20012296A3 (cs) 2002-06-12
US6752324B1 (en) 2004-06-22
JP2003513196A (ja) 2003-04-08
CZ295497B6 (cs) 2005-08-17
EP1144843A1 (de) 2001-10-17
DE50009921D1 (de) 2005-05-04
DE19951144A1 (de) 2001-04-26

Similar Documents

Publication Publication Date Title
EP1135595B1 (de) Ventil zum steuern von flüssigkeiten
EP1144843B1 (de) Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit hydraulischer vorspannung des druckübersetzers
DE19712921A1 (de) Brennstoffeinspritzventil mit piezoelektrischem oder magnetostriktivem Aktor
DE102006028638A1 (de) Kolbenpumpe
AT408134B (de) Speichereinspritzsystem für dieselbrennkraftmaschinen
EP1144857A1 (de) Doppelschaltendes steuerventil mit hydraulischer verstärkung des aktors
EP1123461B1 (de) Injektor für ein common-rail-einspritzsystem für brennkraftmaschinen mit kompakter bauweise
EP1395744A1 (de) Kraftstoff-einspritzvorrichtung für brennkraftmaschinen, insbesondere common-rail-injektor, sowie kraftstoffsystem und brennkraftmaschine
DE102006017034B4 (de) Piezo-Aktor, Verfahren zum Herstellen eines Piezo-Aktors und Einspritzsystem mit einem solchen
EP1144842B1 (de) Injektor für ein kraftstoffeinspritzsystem für brennkraftmaschinen mit in den ventilsteuerraum ragender düsennadel
EP1531258A2 (de) Kraftstoffeinspritzventil
DE19945785B4 (de) Kraftstoffeinspritzsystem für Brennkraftmaschinen und Verfahren zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine
DE10145622A1 (de) Ventil zum Steuern von Flüssigkeiten
WO2001029407A1 (de) Doppeltschaltendes steuerventil mit kugelförmigem stellglied
EP1129284A1 (de) Gebautes steuerventil für einen injektor eines kraftstoffeinspritzsystems für brennkraftmaschinen
DE102018107108A1 (de) Umschaltventil zum Steuern eines Hydraulikflüssigkeitsstroms und Pleuel für eine Brennkraftmaschine mit variabler Verdichtung mit einem Umschaltventil
DE10124207A1 (de) Druckverstärker einer Kraftstoffeinspritzeinrichtung
DE19949525B4 (de) Druckübersetzer für ein Kraftstoffeinspritzsystem für Brennkraftmaschinen mit hydraulisch unterstützter Wiederbefüllung
EP1208321A1 (de) Ventil zum steuern von flüssigkeiten
DE10307003B3 (de) Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine
DE102018206334A1 (de) Kraftstofffördereinrichtung für kryogene Kraftstoffe
DE102017222202A1 (de) Kraftstofffördereinrichtung für kryogene Kraftstoffe
DE10061621A1 (de) Kraftstoffhochdruckpumpe mit integrierter Überdrucksicherung
DE102021203663A1 (de) Kraftstoff-Hochdruckpumpe
DE19963934A1 (de) Steuerventil für einen Injektor für ein Kraftstoffeinspritzsystem mit von einem Stößel geführtem Stellglied

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

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

17P Request for examination filed

Effective date: 20011105

RBV Designated contracting states (corrected)

Designated state(s): CH DE ES FR GB IT LI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 50009921

Country of ref document: DE

Date of ref document: 20050504

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051012

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20051220

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20060102

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20051012

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111007