EP0351631B1 - Dispositif de commande pour un injecteur de combustible - Google Patents

Dispositif de commande pour un injecteur de combustible Download PDF

Info

Publication number
EP0351631B1
EP0351631B1 EP89112156A EP89112156A EP0351631B1 EP 0351631 B1 EP0351631 B1 EP 0351631B1 EP 89112156 A EP89112156 A EP 89112156A EP 89112156 A EP89112156 A EP 89112156A EP 0351631 B1 EP0351631 B1 EP 0351631B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve body
valve seat
pressure chamber
control device
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
EP89112156A
Other languages
German (de)
English (en)
Other versions
EP0351631A1 (fr
Inventor
Michael Dipl.-Ing. Zipprath
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.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
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 INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Publication of EP0351631A1 publication Critical patent/EP0351631A1/fr
Application granted granted Critical
Publication of EP0351631B1 publication Critical patent/EP0351631B1/fr
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
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating means
    • 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
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/502—Springs biasing the valve member to the open position
    • 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

Definitions

  • the invention relates to a control device for a fuel injection nozzle of an internal combustion engine, in particular a diesel engine, with a tubular valve body which is displaceably guided in a valve housing on a guide diameter and controlled by a drive element and which can be placed at one end on a valve seat of the valve housing and an interior has, which is supported on the valve body, a pressure spring counteracting the force of the drive element, and with a fuel pressure chamber which is arranged in the valve housing between a fuel inlet and the valve seat, the valve seat being opposite the end of the valve body close to the inlet and at When the valve is closed, an injection pressure builds up in the pressure chamber for the injection nozzle and when the valve is open there is pressure equalization between the pressure chamber and a fuel outlet, the pressure chamber being open to the outlet through the interior through the valve seat is.
  • a control device for a fuel injector is described in document DE-A-3 704 743.
  • the drive element for example electronically controlled, emits a force-displacement pulse with which the valve seat is closed. This is in a fuel return line. By closing the valve seat, a desired, high injection pressure builds up on the injection nozzle of the relevant cylinder of the internal combustion engine.
  • valve seat is provided on the valve housing opposite the end of the valve body near the drain.
  • the volume of the pressure chamber is correspondingly large.
  • a large-volume pressure chamber is unfavorable, however, since a correspondingly large fuel volume must be pressurized when the valve is closed.
  • the fuel when the valve is opened, the fuel must flow outside the valve body. A comparatively high flow resistance is to be expected, which delays the pressure equalization.
  • the object of the invention is to improve a control device of the type mentioned in such a way that, on the one hand, the pressure builds up when the valve is closed and, on the other hand, the pressure equalization takes place quickly when the valve is open.
  • valve body When the valve is opened, the pressure chamber communicates with the comparatively large-volume interior of the valve body.
  • the flow resistance during pressure equalization is low, so that pressure equalization takes place quickly.
  • the valve body has a comparatively small moving mass. It has a tubular shape and does not need any outside Area where the fuel flows out when the pressure is equalized. Overall, the control characteristic of the control device is improved by the measures described.
  • valve seat diameter on the valve body is smaller than its guide diameter.
  • a tubular valve body (2) is slidably mounted in a valve housing (1).
  • the guide diameter of the valve body (2) in the valve housing (1) is designated D1.
  • a valve seat (4) is formed between one end edge (3) of the valve body (2) and the valve housing (1).
  • the valve seat diameter is designated D2. This is slightly smaller than the guide diameter D1.
  • the valve body (2) forms an interior (5).
  • the valve seat (4) is shown in its open position in the figure.
  • the compression spring (7) presses the valve body (2) with its end edge (8) facing away from the end edge (3) against a stop ring (9) via the snap ring (6).
  • cup part (10) On the front edge (8) there is a cup part (10) which is connected to a membrane (11).
  • the cup part (10) is provided with openings (12) which lead to an outlet (13) to lead.
  • the interior (5) is thus open to the drain (13).
  • a play compensation element (15) is arranged in an upper part (14) of the valve housing (1), which on the one hand abuts the cup part (10) and on the other hand is acted upon by a drive element (16).
  • An inlet (17) is provided on the valve body (2).
  • An annular pressure chamber (18) is formed between this and the valve seat (4).
  • the valve housing (1) is inserted into a base body (19). It is held in this by means of a screw sleeve (20).
  • the sequence (13) continues in the base body (19).
  • a further outlet (21) is provided on the valve body (2) in the area of the interior (5). This is assigned to a corresponding opening (22) in the base body (19).
  • the base body (19) is designed so that only one of the processes (13, 21) is effective.
  • the drain (13 or 21) is connected to the low pressure side of an injection pump, not shown.
  • An injection nozzle, not shown, and the inlet (17) are located on the high-pressure side thereof.
  • Fuel is supplied by the injection pump through the inlet (17), the pressure chamber (18), the valve seat (4), the interior (5) and the outlet (13 or 21) connected in each case. No pressure builds up in the pressure chamber (18), so that the injection nozzle is closed.
  • the compression spring (7) keeps the valve seat (4) open.
  • the drive element (16) If the drive element (16) is actuated, for example electronically controlled, then it presses the cup part (10) onto the valve body (2) via the play compensation element (15) so that the valve seat (4) counteracts the force of the compression spring (7). closes.
  • a high pressure for example 1000 bar, builds up in the pressure chamber (18) and opens the injection nozzle.
  • the locking force to be transmitted to the valve seat (4) is comparatively low, since the valve seat diameter (D2) and the guide diameter (D1) are essentially the same size.
  • valve body (2) moves under the action of the compression spring (7).
  • the opening effect is supported by the fact that the valve seat diameter (D2) is slightly smaller than the guide diameter (D1).
  • the valve seat (4) is opened, the pressure prevailing in the pressure chamber (18) quickly decreases via the interior (5).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (2)

  1. Dispositif de commande pour un injecteur de carburant d'un moteur à combustion interne, en particulier d'un moteur Diesel, du type comprenant guidé en déplacement sur un diamètre de guidage (D1) dans un boîtier de soupape (1) et commandé par un élément d'entraînement (16), un corps tubulaire de soupape (2) qui définit un espace intérieur (5) et dont une extrémité est adaptée pour s'appuyer sur un siège de soupape (4) prévu sur le boîtier de soupape (1), un ressort de pression (7) à action opposée à la force de l'élément d'entraînement (16) étant en appui contre le corps de soupape (2), et une chambre de pression (18) de carburant agencée dans le boîtier de soupape (1) entre un orifice d'entrée (17) de carburant et le siège de soupape (4), ce dernier étant disposé en face de l'extrémité du corps de soupape (2) située proche de l'orifice d'entrée (17), une pression d'injection pour l'injecteur se développant dans la chambre de pression (18) quand la soupape est fermée et une compensation de pression entre la chambre de pression (18) et un orifice de sortie (13) de carburant ayant lieu lorsque la soupape est ouverte, alors que la chambre de pression (18) est en communication avec l'orifice de sortie (13) par le siège de soupape (4) et par l'espace intérieur (5), caractérisé en ce qu'une bague de butée (9) est associée au bord frontal (8) du corps tubulaire de soupape (2) situé à l'opposé du siège de soupape (4), que sur ce bord frontal (8) est disposé, pour l'entraînement du corps de soupape (2), une partie en forme de coupe (10) qui comprend des ouvertures (12) par lesquelles l'espace intérieur (5) du corps de soupape (2) est en communication avec l'orifice de sortie (13), et que le ressort de pression (7) s'appuie contre la face intérieure du corps de soupape (2) par l'intermédiaire d'un jonc en segment (6).
  2. Dispositif de commande selon la revendication 1, caractérisé en ce que le diamètre (D2) du siège de soupape prévu sur le corps de soupape (2) est inférieur au diamètre de guidage (D1) du corps de soupape (2).
EP89112156A 1988-07-20 1989-07-04 Dispositif de commande pour un injecteur de combustible Expired - Lifetime EP0351631B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824644 1988-07-20
DE3824644A DE3824644A1 (de) 1988-07-20 1988-07-20 Steuereinrichtung fuer eine kraftstoff-einspritzduese

Publications (2)

Publication Number Publication Date
EP0351631A1 EP0351631A1 (fr) 1990-01-24
EP0351631B1 true EP0351631B1 (fr) 1992-11-11

Family

ID=6359152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112156A Expired - Lifetime EP0351631B1 (fr) 1988-07-20 1989-07-04 Dispositif de commande pour un injecteur de combustible

Country Status (4)

Country Link
US (1) US5137256A (fr)
EP (1) EP0351631B1 (fr)
JP (1) JPH0267457A (fr)
DE (2) DE3824644A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8967591B2 (en) * 2011-02-24 2015-03-03 Wabtec Holding Corp. Trip cock fault detector

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633857A (en) * 1949-07-06 1953-04-07 Worthington Corp Governor steam control and emergency valve for steam turbines
DD122574A1 (fr) * 1975-10-24 1976-10-12 Karl Marx Stadt Automobilbau
US4392612A (en) * 1982-02-19 1983-07-12 General Motors Corporation Electromagnetic unit fuel injector
US4463900A (en) * 1983-01-12 1984-08-07 General Motors Corporation Electromagnetic unit fuel injector
US4550875A (en) * 1984-08-06 1985-11-05 General Motors Corporation Electromagnetic unit fuel injector with piston assist solenoid actuated control valve
DE3704739A1 (de) * 1987-02-14 1988-06-09 Daimler Benz Ag Piezosteuerventil

Also Published As

Publication number Publication date
DE58902666D1 (de) 1992-12-17
US5137256A (en) 1992-08-11
DE3824644A1 (de) 1990-01-25
JPH0267457A (ja) 1990-03-07
EP0351631A1 (fr) 1990-01-24

Similar Documents

Publication Publication Date Title
EP0925440B1 (fr) Injecteur de carburant
EP1636484B1 (fr) Injecteur pour moteurs a combustion interne
EP1656498B1 (fr) Soupape d'injection de carburant commandee par une soupape pilote
EP0686763A1 (fr) Injecteur de combustible pour moteurs à combustion interne
EP0949415A2 (fr) Dispositif d'injection de combustible pour moteurs à combustion interne
DE10326259A1 (de) Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
DE10336327A1 (de) Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
EP1135603B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
EP1016783B1 (fr) Dispositif d'injection de carburant pour moteurs à combustion
DE4115457A1 (de) Einspritzduese fuer eine brennkraftmaschine
DE102006049885A1 (de) Injektor zur Einspritzung von Kraftstoff in Brennräume von Brennkraftmaschinen
DE102017212459A1 (de) Injektor zur Einspritzung von flüssigem und gasförmigem Kraftstoff
DE102004024527A1 (de) Kraftstoffeinspritzeinrichtung
DE3113475A1 (de) "kraftstoffeinspritzduese"
WO2001051805A2 (fr) Injecteur
EP1135606B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
EP0351631B1 (fr) Dispositif de commande pour un injecteur de combustible
DE19940292B4 (de) Steuerventil für ein Kraftstoffeinspritzventil
DE2112735B2 (de) Regeleinrichtung für die von einer Verteilereinspritzpumpe für Brennkraftmaschinen zuzumessende Brennstoffmenge
DE2726300A1 (de) Kraftstoffeinspritzduese
EP0752059B1 (fr) Systeme d'injection de carburant
DE10117861A1 (de) Injektordüse mit Drosselverhalten
EP1815129B1 (fr) Injecteur de carburant
WO2006079425A1 (fr) Système d'injection de carburant
DE1247066B (de) Kraftstoff-Einspritzventil fuer fremdgezuendete Brennkraftmaschinen

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

17P Request for examination filed

Effective date: 19890704

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19910111

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

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

Ref document number: 58902666

Country of ref document: DE

Date of ref document: 19921217

ET Fr: translation filed
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

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940620

Year of fee payment: 6

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

Ref country code: FR

Payment date: 19940705

Year of fee payment: 6

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

Ref country code: GB

Effective date: 19950704

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

Effective date: 19950704

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

Ref country code: FR

Effective date: 19960430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 20020724

Year of fee payment: 14

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: 20040203

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050704