EP1576276A1 - Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection - Google Patents

Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection

Info

Publication number
EP1576276A1
EP1576276A1 EP03812121A EP03812121A EP1576276A1 EP 1576276 A1 EP1576276 A1 EP 1576276A1 EP 03812121 A EP03812121 A EP 03812121A EP 03812121 A EP03812121 A EP 03812121A EP 1576276 A1 EP1576276 A1 EP 1576276A1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure side
low
fuel injection
connection
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Withdrawn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
EP03812121A
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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 EP1576276A1 publication Critical patent/EP1576276A1/fr
Withdrawn legal-status Critical Current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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves

Definitions

  • the invention is based on a fuel injection device according to the preamble of claim 1.
  • a fuel injection device for example, known from DE 100 39 215 A1
  • the nozzle needle of a fuel injection valve is opened or dependent on the pressure prevailing in a control chamber closed.
  • the control chamber which is permanently connected to the high-pressure side, can be connected to the low-pressure side by means of a 2/2-way control valve designed as a double-seat valve and can thus be relieved of pressure.
  • injection course shaping is not possible with this fuel injection device.
  • the fuel injection device according to the invention with the characterizing features of claim dem has the advantage that the pressure prevailing in the control chamber in the two open valve positions of the control valve is reduced at different speeds and therefore an injection curve can be carried out.
  • FIG. 1 shows the fuel injection device according to the invention with a double seat valve controlling the pressure in a control chamber in its lower valve position
  • FIG. 2 shows the double seat valve of FIG. 1 in its middle valve position
  • Fig. 3 shows the double seat valve of Figure 1 in its upper valve position.
  • Fig. 4 shows another embodiment of the invention
  • Fuel injection device with a differently designed double seat valve in a representation analogous to FIG. 1.
  • the fuel injection device 1 according to the invention shown in FIG. 1 is usually used in an internal combustion engine with a plurality of cylinders, with each of these cylinders being assigned a fuel injection valve (injector).
  • This injector has, in a manner known per se, an injector nozzle, not shown here, which projects into a cylinder combustion chamber of the internal combustion engine, and an injector needle 3 which opens and closes the injector depending on the pressure in a control chamber 2 and is only indicated to a small extent here.
  • the control room 2 is permanently connected to a high-pressure inlet line (high-pressure side) 5 via an inlet throttle 4.
  • a 3/3-way control valve 6 in the form of a double-seat valve is provided, which opens or blocks the connection of the control chamber 2 with a low-pressure drain line (low-pressure side) 7.
  • the high-pressure inlet line 5 can be connected to a high-pressure reservoir (common rail), not shown, and the low-pressure outlet line 7 can be connected to leakage oil.
  • the control valve 6 has a high-pressure side valve connection 8, which is connected to the control chamber 2, and two low-pressure side valve connections 9, 10, which are each connected to the low-pressure discharge line 7 via an outlet throttle 11, 12.
  • the control valve 6 has a valve body 13 designed as a valve ball, which is axially adjustable in a valve chamber 14 between two coaxial annular valve seats 15, 16 by means of a piezoelectric actuator 17 against the action of a closing spring 18.
  • the valve chamber 14 is connected via the valve opening of the lower valve seat 15 in FIG. 1 to the high-pressure valve connection 8 and via the valve opening of the upper valve seat 16 to the first low-pressure valve connection 9.
  • the second low-pressure valve connection 10 is permanently connected to the valve chamber 14 connected.
  • the valve body 13 can be moved into an upper, middle or lower valve position by means of the actuator 17.
  • valve opening of the lower valve seat 15 is closed by the valve body 13 and the valve opening of the upper valve seat 16 is opened, so that the connection of the control chamber 2 to the low-pressure drain line 7 is blocked.
  • the high pressure prevailing in the control chamber 2 acts on a control surface 19 of the nozzle needle 3 acting in the closing direction of the nozzle needle 3, so that the nozzle needle 3 or the fuel injection valve are closed.
  • valve body 13 In the middle valve position shown in FIG. 2, the valve body 13 is located between the two valve seats 15, 16, so that the valve openings of the two valve seats 15, 16 are open.
  • the high-pressure valve connection 8 is now connected to both low-pressure valve connections 9, 10, so that the
  • Control room 2 is connected to the low-pressure discharge line 7 via both discharge throttles 11, 12. As a result, the pressure prevailing in the control chamber 2 is reduced and the nozzle needle 3 or the fuel injection valve open.
  • the pressure reduction rate is determined by the two parallel discharge throttle 11, 12. If the first outlet throttle 11 has a significantly smaller throttle resistance than the second outlet throttle 12, the pressure reduction rate is approximately determined by the first outlet throttle 11.
  • valve body 13 closes the valve opening of the upper valve seat 16.
  • the high-pressure side valve connection 8 is only connected to the second low-pressure side valve connection 10, so that the control chamber 2 is connected to the low-pressure valve only via the second outlet throttle 12. Drain line 7 is connected.
  • the pressure reduction rate is determined by the second outlet throttle 12.
  • valve body 113 of the control valve 106 is designed as a valve piston and is guided axially displaceably in a guide bore 120.
  • the valve body 113 has a lower and an upper conical valve sealing surface 121, 122 which cooperate with the two conical valve seats 115, 116.
  • the valve chamber 114 provided between the two valve seats 115, 116 is connected via the valve opening of the lower valve seat 115 in FIG. 4 to a lower annular space 123 of the guide bore 120 and via the valve opening of the upper valve seat 116 to an upper annular space 124 of the guide bore 120, the two annular spaces 123, 124 are formed by annular grooves of the valve body 113.
  • the high-pressure side valve connection 108 opens into the lower annular space 123, and the first low-pressure side valve connection 109 extends from the upper annular space 124.
  • the second low-pressure side valve connection 110 extends from the valve chamber 114.
  • the first low-pressure side valve connection 109 is connected to the low-pressure discharge line 107 via the first discharge throttle 111 and the second low-pressure side valve connection 110 is connected via the first discharge throttle 112.
  • Leakage oil line 125 in order to discharge the leakage oil present between valve body 113 and guide bore 120.
  • the first valve connection 108 is connected to both low-pressure side valve connections 109, 110, so that the pressure prevailing in the control chamber 102 is reduced via the two flow restrictors 111, 112 and that Open nozzle needle 103 or the fuel injection valve.
  • the high-pressure-side valve connection 108 is only connected to the second low-pressure-side valve connection 110, so that the pressure prevailing in the control chamber 102 is reduced only via the second outlet throttle 1 12 and the nozzle needle 3 or the fuel injection valve open.
  • a suitable injection course shaping by means of the control valve 106 can be set by a suitable combination of the two outlet throttles 11 1, 112 and the inlet throttle 104.

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)

Abstract

L'invention concerne un dispositif d'injection de carburant (1) pour moteurs à combustion interne, qui comprend une chambre de commande (2), raccordée au côté haute pression (5), et une soupape de commande (6) qui est reliée, par un raccord de soupape côté haute pression (8), à la chambre de commande (2), et, par un premier raccord de soupape côté basse pression (9), et, par l'intermédiaire d'un premier étranglement d'écoulement (11), à un côté basse pression (7). Selon l'invention, dans ce dispositif se trouve un second raccord de soupape côté basse pression (10) de la soupape de commande (6) qui est relié, par l'intermédiaire d'un second étranglement d'écoulement (12), au côté basse pression (7). Lorsque la soupape se trouve dans une première position, la communication entre le raccord de soupape côté haute pression (8) et le côté basse pression (7) est bloquée. Quand la soupape se trouve dans une deuxième position, le raccord de soupape côté haute pression (8) communique avec les deux raccords de soupape côté basse pression (9, 10). Enfin, quand la soupape se trouve dans une troisième position, le raccord de soupape côté haute pression (8) communique avec un des deux raccords de soupape côté basse pression (9, 10).
EP03812121A 2002-12-05 2003-07-10 Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection Withdrawn EP1576276A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256748 2002-12-05
DE10256748 2002-12-05
PCT/DE2003/002316 WO2004051071A1 (fr) 2002-12-05 2003-07-10 Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection

Publications (1)

Publication Number Publication Date
EP1576276A1 true EP1576276A1 (fr) 2005-09-21

Family

ID=32403704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03812121A Withdrawn EP1576276A1 (fr) 2002-12-05 2003-07-10 Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection

Country Status (2)

Country Link
EP (1) EP1576276A1 (fr)
WO (1) WO2004051071A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100432415C (zh) * 2004-07-06 2008-11-12 株式会社电装 共轨喷油器
JP4325589B2 (ja) * 2004-07-06 2009-09-02 株式会社デンソー コモンレール用インジェクタ
DE102006013702A1 (de) * 2006-03-24 2007-09-27 Robert Bosch Gmbh Kraftstoffinjektor
DE102006056840A1 (de) * 2006-12-01 2008-06-05 Robert Bosch Gmbh Kraftstoffinjektor
DE102007001554A1 (de) * 2007-01-10 2008-07-17 Robert Bosch Gmbh Kraftstoffinjektor
GB201411162D0 (en) * 2014-06-24 2014-08-06 Delphi International Operations Luxembourg S.�.R.L. Control valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1041272B1 (fr) * 1999-04-01 2004-10-27 Delphi Technologies, Inc. Injecteur de combustible
DE19946833C2 (de) * 1999-09-30 2002-02-21 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
JP3551898B2 (ja) * 2000-06-15 2004-08-11 トヨタ自動車株式会社 燃料噴射弁
DE10039215A1 (de) * 2000-08-11 2002-02-28 Bosch Gmbh Robert Sitzventilanordnung, insbesondere für ein Kraftstoffeinspritzsystem einer Verbrennungsmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004051071A1 *

Also Published As

Publication number Publication date
WO2004051071A1 (fr) 2004-06-17

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