EP0575887B1 - Dispositif d'injection - Google Patents

Dispositif d'injection Download PDF

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Publication number
EP0575887B1
EP0575887B1 EP93109661A EP93109661A EP0575887B1 EP 0575887 B1 EP0575887 B1 EP 0575887B1 EP 93109661 A EP93109661 A EP 93109661A EP 93109661 A EP93109661 A EP 93109661A EP 0575887 B1 EP0575887 B1 EP 0575887B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
injection
piston
nozzle needle
fuel
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
EP93109661A
Other languages
German (de)
English (en)
Other versions
EP0575887A1 (fr
Inventor
Reinhard Häfner
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.)
Caterpillar Motoren GmbH and Co KG
Original Assignee
Krupp Mak Maschinenbau GmbH
MaK Motoren GmbH and Co KG
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 Krupp Mak Maschinenbau GmbH, MaK Motoren GmbH and Co KG filed Critical Krupp Mak Maschinenbau GmbH
Publication of EP0575887A1 publication Critical patent/EP0575887A1/fr
Application granted granted Critical
Publication of EP0575887B1 publication Critical patent/EP0575887B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • 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
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side

Definitions

  • the invention relates to an injection device for internal combustion engines, in particular diesel engines with injection valves for fuel or ignition oil and highly compressed fuel gas.
  • EP-A-237071 which forms the closest prior art, discloses an injection device with two injection nozzles of the generic type, in which the first and second nozzle needles are loaded via a spring.
  • the problem here is, in addition to the large design by the spring, to control short periods of time in a reliable manner.
  • the object of the invention is to provide an injection device for engines with which a particularly favorable injection behavior can be achieved and where a first and a second injection valve are to be accommodated in a small space.
  • the main advantages achieved with the invention are that the two injection nozzles are combined in one holder and thus an efficient injection system for fuel gas and fuel or ignition oil is achieved with little space requirement. This is essentially achieved by using a hydraulic load on the first and second nozzle needles instead of the large steel springs.
  • the diameter of the nozzle needles and the diameter of the first and second pistons can be managed with one and the same hydraulic closing pressure by suitable selection.
  • the fuel to be ignited is always injected in the direction in which the ignition source produces the ignition source. This contributes significantly to the good mixing of fuel and air.
  • the wish described in this way can hardly be accepted two different injection nozzles and so far only very difficult to represent with double nozzles or multiple nozzles.
  • the jet positions of gas nozzles and pre-injection nozzles which in turn can also be the main nozzle in pure diesel operation, are so directed that the jets meet spatially in a common plane and a circular line or distance line lying thereon.
  • the two injection nozzles are arranged side by side in a common nozzle holder which is combined with a segment having the double piston device and the corresponding pressure bores and channels via a threaded sleeve which is connected to a connecting element in which the supply channels are arranged.
  • the injection device essentially comprises, in a holder 1, two injection valves 2 and 3, which comprise nozzle needles 4 and 5 and open or close spray holes 36, 37 in nozzle element 35 and 34.
  • One injection valve 2 is designed for supplying fuel or ignition oil and the other injection valve 3 is designed for supplying fuel gas into the cylinder.
  • the holder 1 is connected to a segment 8 via a threaded sleeve 9 with a connecting element 10.
  • this channel 11 and 12 are provided for the supply of a closing pressure S and a control pressure Z in the segment 8, in which the channels are continued.
  • the injection valve 3 has a double-piston device D, which is arranged coaxially to the nozzle needle 5 and can be acted upon by a closing pressure S via the channel 11 and a control pressure Z via the channel 12.
  • the device D comprises a first piston 30 with a larger diameter and a piston 31 with a smaller diameter, which rests on the nozzle needle 5.
  • the channel 12 enters the control pressure Z, the channel 11 opening into a space 13 at the end of the larger piston 30.
  • Further channels 14 are used for supplying fuel gas to the valve 3, which enter an annular space 16 below the nozzle needle 5.
  • the further valve 2 for supplying fuel or pilot oil in the holder 1 comprises the nozzle needle 4, the head 17 of which dips into a space 18 which is connected to a channel 19, via which the nozzle needle 4 can be acted upon by a closing pressure S from the channel 11 .
  • a transverse channel 20 is e.g. in the parting plane between the connecting element 10 and the segment 8. a milling is provided.
  • the fuel or ignition oil is supplied to valve 2 in an annular space 21 via a further channel 23.
  • the fuel gas which is prestressed under high pressure, flows through the two gas channels 14 into the annular space 16 of the nozzle 5 together with the nozzle needle and acts there on the shoulder 5a of the nozzle needle 5 with the aim of lifting it up.
  • the small piston 31, pressed by the larger piston 30, acts opposite the exhaust gas pressure G against the needle 5 under the closing pressure S supplied via the channel 11.
  • the space 18 above the nozzle needle 4 is connected to the closing pressure channel 11 e.g. through the transverse channel 20 connected to the channel 19 so that the needle 4 is held tightly against its seat 32 against the gas pressure of the cylinder. If the quantity of ignition oil or also the normal quantity of diesel is pumped through the channel 23 under the shoulder 4a of the nozzle needle 4, the pressure rising there will move the nozzle needle upwards and the ignition oil injection process or the diesel fuel injection process takes place.
  • the ignition oil nozzles 34 and the gas nozzle 35 have spray holes 36 and 37 which are directed in a defined manner and are each arranged largely uniformly distributed.
  • the gas jets 38 emerging from the spray holes 36 and the fuel jets 39 emerging from the spray holes 37 therefore meet in a common plane E on a circular line K in an area or at a point.
  • the center of the circle M lies between the two nozzle needles 4 and 5, so that the jets meet at approximately the same distance from this center M.

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

Claims (8)

  1. Dispositif d'injection pour moteurs à combustion, en particulier pour moteurs Diesel, qui comporte des soupapes d'injection (2,3) pour le combustible et l'huile d'allumage et pour le gaz de combustion fortement comprimé, le dispositif étant caractérisé en ce qu'une première aiguille d'injection (4) d'une première soupape d'injection (2) et une seconde aiguille d'injection (5) d'une seconde soupape d'injection (3) peuvent être sollicitées par une pression de fermeture hydraulique commune (S) qui, d'une part, agit par l'intermédiaire d'un dispositif à deux pistons (F) comprenant un premier piston (30) et un second piston (31), sur la seconde aiguille d'injection (5) dans l'un (35) des injecteurs, prévu pour le gaz de combustion, et qui, d'autre part, agit directement sur la première aiguille d'injection (4) dans l'autre (34) des injecteurs, prévu pour le combustible et pour l'huile d'allumage, le dispositif étant en outre caractérisé en ce que les deux pistons (30, 31) que comporte le dispositif à deux pistons (D) sont soumis à une pression de commande déterminée (Z) qui peut se superposer à la pression de fermeture (S) et à la pression du gaz de combustion (G) pendant l'opération d'injection, et en ce que, à l'intervention de la pression de commande (Z), une position d'ouverture et une position de fermeture de la seconde aiguille d'injection (5) peuvent être déterminées, la première aiguille d'injection (4) pouvant être sollicitée pour l'ouverture, à l'encontre de la pression de fermeture (S) par le combustible ou par l'huile d'allumage amené par un conduit (23).
  2. Dispositif d'injection suivant la revendication 1, caractérisé en ce que le dispositif à deux pistons (D) comporte un premier piston (30) de diamètre relativement grand qui coopère avec un second piston (31) de plus faible diamètre, de telle manière que le premier piston (30) puisse être déplacé à l'encontre de la pression de fermeture (S) et s'applique à la seconde aiguille d'injection (5) et qu'il puisse être déplacé lors de la sollicitation par le gaz de combustion, à l'encontre de la pression de commande (Z), pour la production d'une position d'ouverture de la seconde aiguille d'injection (5).
  3. Dispositif d'injection suivant la revendication 2, caractérisé en ce qu'un premier conduit d'amenée (11) qui conduit la pression de fermeture (S) au premier piston (30) du dispositif à deux pistons (D) de la seconde soupape d'injection (3), est relié par un conduit transversal (20) à un autre conduit (19), qui mène à la première soupape d'injection (2).
  4. Dispositif d'injection suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que dans un support d'injecteurs (1), il est prévu, en tant que première et seconde aiguille d'injection (4,5), deux aiguilles d'injection qui sont juxtaposées l'une à l'autre (4,5), la seconde aiguille d'injection (5) ayant été montée pour l'arrivée du gaz et la première aiguille d'injection (4) ayant été montée pour l'arrivée du combustible ou de l'huile d'allumage.
  5. Dispositif d'injection suivant la revendication 4, caractérisé en ce que le support d'injecteurs (1) est assemblé à un segment (8) comportant le dispositif à deux pistons (D) ainsi qu'un conduit d'amenée (12) et l'autre conduit (19) pour la pression de fermeture et de commande par un manchon fileté (9) qui prend de l'arrière une bride du support d'injecteurs (1) et est fixé à un élément de raccord (10) qui présente les conduits d'amenée (11, 12) de la pression de fermeture et de commande.
  6. Dispositif d'injection suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que, concentriquement autour de la seconde aiguille d'injection (5), il a été prévu plusieurs premières aiguilles d'injection (4) pour le combustible.
  7. Dispositif d'injection suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que plusieurs orifices d'injection (36, 37) ont été prévus, en répartition uniforme, dans les deux injecteurs (35, 34) respectivement, en ce que les jets sortants (38, 39) débités par l'un (35) des injecteurs et par l'autre (34) des injecteurs se rencontrent dans un plan commun (E) et sur un même cercle (K) et en ce que le cercle a son centre (M) entre les deux injecteurs (34, 35).
  8. Dispositif d'injection suivant l'une quelconque des revendications 1 à 7, caractérisé en ce qu'une chambre comprise entre l'extrémité postérieure de la seconde aiguille d'injection (5) et le second piston (31) du dispositif à deux pistons (D) est relié à un passage de fuite (33).
EP93109661A 1992-06-24 1993-06-17 Dispositif d'injection Expired - Lifetime EP0575887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4220619A DE4220619A1 (de) 1992-06-24 1992-06-24 Einspritzeinrichtung
DE4220619 1992-06-24

Publications (2)

Publication Number Publication Date
EP0575887A1 EP0575887A1 (fr) 1993-12-29
EP0575887B1 true EP0575887B1 (fr) 1997-03-05

Family

ID=6461684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109661A Expired - Lifetime EP0575887B1 (fr) 1992-06-24 1993-06-17 Dispositif d'injection

Country Status (3)

Country Link
EP (1) EP0575887B1 (fr)
DE (2) DE4220619A1 (fr)
FI (1) FI104013B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130139790A1 (en) * 2010-07-02 2013-06-06 Hyundai Heavy Industries Co., Ltd. Two-phase fuel injection valve for diesel engine and gas engine including nozzle having pumping function

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI101738B1 (fi) * 1996-01-30 1998-08-14 Waertsilae Nsd Oy Ab Ruiskutusventtiilijärjestely
DE19808798C2 (de) 1998-03-03 2003-10-23 Orange Gmbh Kraftstoffinjektor für eine Brennkraftmaschine
DE19831081C2 (de) * 1998-07-10 2003-09-11 Orange Gmbh Kraftstoffinjektor für eine Brennkraftmaschine
DE102013203271A1 (de) * 2013-02-27 2014-08-28 Mtu Friedrichshafen Gmbh Einspritzventil einer Kraftstoffeinbringvorrichtung einer Brennkraftmaschine, Kraftstoffeinbringvorrichtung sowie Brennkraftmaschine
DE102013022260B3 (de) 2013-12-30 2015-05-21 L'orange Gmbh Dual-Fuel-Kraftstoffinjektor
DE102016002228B4 (de) * 2016-02-25 2017-12-14 L'orange Gmbh Kraftstoffinjektor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243176A1 (de) * 1982-11-23 1984-05-24 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzeinrichtung fuer alkoholkraftstoffe, insbesondere bei direkteinspritzenden dieselmotoren
FR2595761B1 (fr) * 1986-03-14 1988-05-13 Semt Dispositif d'injection pour moteur a combustion interne, permettant l'injection de deux combustibles
DK0546985T3 (da) * 1991-12-10 1999-10-11 New Sulzer Diesel France Sa Brændstofindsprøjtningsventil til en stempelforbrændingsmotor til drift efter valg med dieselolie eller med et gasformet br

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130139790A1 (en) * 2010-07-02 2013-06-06 Hyundai Heavy Industries Co., Ltd. Two-phase fuel injection valve for diesel engine and gas engine including nozzle having pumping function
US9605635B2 (en) * 2010-07-02 2017-03-28 Hyundai Heavy Industries, Co., Ltd. Two-phase fuel injection valve for diesel engine and gas engine including nozzle having pumping function

Also Published As

Publication number Publication date
DE59305564D1 (de) 1997-04-10
FI104013B1 (fi) 1999-10-29
FI104013B (fi) 1999-10-29
DE4220619A1 (de) 1994-01-05
EP0575887A1 (fr) 1993-12-29
FI932941A0 (fi) 1993-06-24
FI932941A (fi) 1993-12-25

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