EP2100027A2 - Injecteur pour moteurs à combustion interne - Google Patents

Injecteur pour moteurs à combustion interne

Info

Publication number
EP2100027A2
EP2100027A2 EP07821100A EP07821100A EP2100027A2 EP 2100027 A2 EP2100027 A2 EP 2100027A2 EP 07821100 A EP07821100 A EP 07821100A EP 07821100 A EP07821100 A EP 07821100A EP 2100027 A2 EP2100027 A2 EP 2100027A2
Authority
EP
European Patent Office
Prior art keywords
valve
control
control sleeve
valve seat
fuel injection
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.)
Granted
Application number
EP07821100A
Other languages
German (de)
English (en)
Other versions
EP2100027B1 (fr
Inventor
Nestor Rodriguez-Amaya
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 EP2100027A2 publication Critical patent/EP2100027A2/fr
Application granted granted Critical
Publication of EP2100027B1 publication Critical patent/EP2100027B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to a fuel injection valve for internal combustion engines, as it is used for the injection of fuel directly into the combustion chambers of internal combustion engines and which is preferably used in so-called common rail systems.
  • the invention is based on a fuel injection valve, as is known from the laid-open specification EP 1 612 403 A1.
  • the injection valve described therein has a valve needle for opening and closing at least one injection opening, wherein the movement of the valve needle is controlled by the fact that the pressure in a control chamber is lowered or raised by a control valve.
  • the control valve controls a cross section between a non-pressurized leakage oil space, which is also present in the fuel injection valve, and the control chamber, wherein the control chamber is constantly connected via a high-pressure line with a high-pressure fuel source.
  • the control valve comprises a
  • Control sleeve which is arranged longitudinally displaceable and which is movable via an electromagnet in the longitudinal direction.
  • the control sleeve cooperates with a valve seat, so that when it rests against the valve seat, an annular space which is connected to the control chamber is closed against the leakage oil space. If the control sleeve lifts off the valve seat, a connecting cross-section is opened which connects the annular space and thus also the control chamber with the leakage oil space.
  • the closing of the control valve should be carried out as quickly as possible, so that the valve needle closes very quickly to prevent dripping of the fuel injection valve, which can reach unspent fuel into the combustion chamber, which would increase the hydrocarbon emissions.
  • the closing movement is effected by the force of a strong closing spring, which leads to a relatively violent impact of the control sleeve on the valve seat and thus to corresponding noise, which could interfere with and beyond the wear in the region of the valve seat elevated.
  • the fuel injection valve according to the invention has the advantage that the control sleeve is damped in the last portion of its closing movement seated on the valve seat, so that the forces are reduced in the region of the valve seat. This also reduces the wear, and the noise of the control valve is reduced.
  • the control sleeve has an outer cylindrical portion which faces an inner cylindrical portion on the throttle body upon contact of the control sleeve on the valve seat, so that between the two cylindrical sections, a throttle gap is formed, wherein the area between the control sleeve and the valve seat at open control valve is filled with fuel. During the closing movement of the control sleeve, this fuel is forced into the leakage oil space, which happens virtually without resistance in the known fuel injection valve.
  • both the valve seat and the sealing surface of the control sleeve, with which the control sleeve ultimately rests on the valve seat are substantially conically shaped, wherein the conical surfaces have a different opening angle, so that the control sleeve substantially at a sealing edge on the valve seat seated and ensures a better seal.
  • the inclination of the conical surfaces of the sealing surface and the valve seat is designed so that the sealing edge is formed on the inner edge of the control sleeve.
  • Figure 1 in longitudinal section the essential section of a fuel injection - valve, wherein the well-known from the prior art
  • Figure 2 is an enlargement of Figure 1 in the region of the valve seat of the control valve.
  • Figure 1 shows a longitudinal section through a fuel injection valve according to the invention, wherein only the essential components are drawn in the region of the control valve.
  • the other components known from the state of the art, in particular the injection nozzle, are for example in DE
  • the fuel injection valve has a housing 1 which comprises a control valve body 2 and a holding body 3.
  • a valve piston 10th illustrated which acts on the valve needle, not shown in the drawing, which ultimately opens and closes the injection openings, is injected through the fuel into the combustion chamber of the internal combustion engine.
  • the valve piston 10 is guided in a valve piece 12 which is arranged in the holding body 3.
  • a control chamber 15 is limited, which is filled via an inlet throttle 20, which is formed in the valve member 12, and formed in a holding body 3 inlet channel 19 with fuel at high pressure.
  • an outlet throttle 18 is provided in the valve piece 12, via which the fuel can be removed from the control chamber 15 into a leakage oil space 40 formed in the control valve body 2.
  • a valve body 25 is arranged in the control valve body 2, in which a bore 28 is formed, into which the outlet throttle 18 opens.
  • the bore 28 is at its end facing away from the holding body 3 in a transverse bore 29, wherein the transverse bore 29 opens into an annular space 30 which is formed in a spinous process 27 of the valve body 25.
  • a control sleeve 32 is arranged longitudinally displaceable, which is connected to a magnet armature 38 and which is pressed by a closing spring 35 against a valve body 25 formed on the valve seat 42.
  • the support of the control sleeve 32 on the valve seat 42 takes place here with a sealing surface 43 which is formed on the valve seat side end of the control sleeve 32.
  • the movement of the control sleeve 32 is effected by means of an electromagnet 37 which surrounds the control sleeve 32 and is arranged within the control valve body 2.
  • the armature 38 connected to the control sleeve 32 is energized by the electromagnet 37 when energized, so that the electromagnet moves away from the holding body 3 and thereby entrains the control sleeve 32, which thus lifts off from the valve seat 42.
  • a cross section between the annular space 30 and the leakage oil space 40 is opened, so that the fuel in the annular space 30 is expanded into the leakage oil space 40.
  • About the transverse bore 29, the bore 28 and the outlet throttle 18 is thus the pressure in the control room
  • an inner cylindrical portion 48 is formed on the valve body 25, an inner cylindrical portion 48 is formed.
  • the inner cylindrical portion 48 is in the closed control valve 5, that is, when the control sleeve 32 is in contact with the valve seat 42, an outer cylindrical portion 49 opposite, which is formed on the inside of the control sleeve 32.
  • a throttle gap 50 is formed between the two cylindrical sections 48 and 49 which dampens the closing movement of the control sleeve 32. This happens because the fuel, which is present when the control valve 5 is open between the valve seat 42 and the sealing surface 43, is displaced by the closing movement in the control sleeve 32.
  • valve seat 42 and sealing surface 43 The exact configuration of valve seat 42 and sealing surface 43 is shown in FIG.
  • the valve seat 42 has a conical shape, which drops outwardly in the illustration of Figure 2 and merges into the inner cylindrical portion 48 at the outer edge.
  • the sealing surface 43 which is formed on the control sleeve 32, also has a conical shape, wherein the cone is formed here flatter than the valve seat 42.
  • the conical sealing surface 43 merges at its outer end in the outer cylindrical portion 49, the the inner cylindrical portion 48 is opposite. Due to the conical configuration of the surfaces 42, 43, a sealing edge 45 is formed on the sealing surface 43, with which the control sleeve 32 rests on the valve seat 42. By the sealing edge 45 is a increased sealing force formed at this point, which unfolds by the increased surface pressure a good sealing effect.
  • control sleeve 32 In addition to the movement of the control sleeve 32 by an electromagnet, it may also be provided to move the control sleeve 32 by another electric actuator, for example a piezoelectric actuator. Since the control sleeve 32 is pressure balanced, d. h., That by the fuel pressure in the annulus 30 no longitudinal force acting on the control sleeve 32 is exercised, 32 only little force necessary for the movement of the control sleeve, so that a piezoelectric actuator would be suitable, possibly with a corresponding Wegberger GmbH.

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)
EP07821100A 2006-12-08 2007-10-10 Injecteur pour moteurs à combustion interne Not-in-force EP2100027B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006057935A DE102006057935A1 (de) 2006-12-08 2006-12-08 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/EP2007/060732 WO2008068084A2 (fr) 2006-12-08 2007-10-10 Injecteur pour moteurs à combustion interne

Publications (2)

Publication Number Publication Date
EP2100027A2 true EP2100027A2 (fr) 2009-09-16
EP2100027B1 EP2100027B1 (fr) 2010-03-10

Family

ID=39363178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07821100A Not-in-force EP2100027B1 (fr) 2006-12-08 2007-10-10 Injecteur pour moteurs à combustion interne

Country Status (5)

Country Link
EP (1) EP2100027B1 (fr)
CN (1) CN101548093B (fr)
AT (1) ATE460583T1 (fr)
DE (2) DE102006057935A1 (fr)
WO (1) WO2008068084A2 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007037825A1 (de) * 2007-08-10 2009-02-12 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
US9464613B2 (en) 2008-06-27 2016-10-11 C.R.F. Societa Consortile Per Azioni Fuel injector equipped with a metering servovalve for an internal combustion engine
DE102008002717A1 (de) * 2008-06-27 2010-01-14 Robert Bosch Gmbh Kraftstoffinjektor mit zweiteiligem Magnetanker
ATE503106T1 (de) 2008-06-27 2011-04-15 Fiat Ricerche Brennstoffeinspritzvorrichtung mit balanciertem mess-servoventil für einen verbrennungsmotor
EP2138708B1 (fr) * 2008-06-27 2010-11-03 C.R.F. Società Consortile per Azioni Injecteur de carburant doté d'une servocommande de mesure pour moteur à combustion interne
DE102009046830B4 (de) 2009-11-18 2023-02-02 Robert Bosch Gmbh Common-Rail-System mit einem Mengensteuerventil
DE102010043092A1 (de) * 2010-10-29 2012-05-03 Robert Bosch Gmbh Druckregelventil
DE102011076666A1 (de) 2011-05-30 2012-12-06 Robert Bosch Gmbh Kraftstoffinjektor für eine Brennkraftmaschine
CN102374084B (zh) * 2011-09-20 2012-12-05 福建省莆田市中涵机动力有限公司 静态无泄漏的高压共轨喷油器
CN102852684B (zh) * 2012-10-12 2014-09-17 福建省莆田市中涵机动力有限公司 共轨喷油器压力平衡式外密封平面控制阀
DE102012220031A1 (de) 2012-11-02 2014-05-08 Robert Bosch Gmbh Kraftstoffinjektor
DE102014212549A1 (de) * 2014-06-30 2015-12-31 Robert Bosch Gmbh Gasinjektor zum Einblasen von gasförmigen Kraftstoffen
DE102015202978A1 (de) * 2015-02-19 2016-08-25 Robert Bosch Gmbh Druckregelventil
DE102015204515A1 (de) * 2015-03-12 2016-09-15 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1163440B1 (fr) * 1999-03-18 2005-10-05 Delphi Technologies, Inc. Injecteur de carburant
DE10131125A1 (de) * 2001-06-28 2002-09-12 Bosch Gmbh Robert Magnetventil mit gedämpftem, einteiligem Ankerelement
US6837221B2 (en) * 2001-12-11 2005-01-04 Cummins Inc. Fuel injector with feedback control
DE10335340A1 (de) * 2003-08-01 2005-02-24 Robert Bosch Gmbh Steuerventil für einen Druckübersetzer enthaltenden Kraftstoffinjektor
ES2277229T3 (es) * 2004-06-30 2007-07-01 C.R.F. Societa Consortile Per Azioni Servovalvula para controlar el inyector de combustible de un motor de combustion interna.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008068084A3 *

Also Published As

Publication number Publication date
CN101548093A (zh) 2009-09-30
WO2008068084A3 (fr) 2008-07-24
EP2100027B1 (fr) 2010-03-10
CN101548093B (zh) 2012-08-08
WO2008068084A2 (fr) 2008-06-12
DE502007003108D1 (de) 2010-04-22
DE102006057935A1 (de) 2008-06-12
ATE460583T1 (de) 2010-03-15

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