EP0817915A1 - Soupape d'injection de carburant pour moteurs a combustion interne - Google Patents

Soupape d'injection de carburant pour moteurs a combustion interne

Info

Publication number
EP0817915A1
EP0817915A1 EP96942256A EP96942256A EP0817915A1 EP 0817915 A1 EP0817915 A1 EP 0817915A1 EP 96942256 A EP96942256 A EP 96942256A EP 96942256 A EP96942256 A EP 96942256A EP 0817915 A1 EP0817915 A1 EP 0817915A1
Authority
EP
European Patent Office
Prior art keywords
valve
injection
bore
valve body
combustion chamber
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
EP96942256A
Other languages
German (de)
English (en)
Other versions
EP0817915B1 (fr
Inventor
Detlev Potz
Guenter Lewentz
Uwe Gordon
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 EP0817915A1 publication Critical patent/EP0817915A1/fr
Application granted granted Critical
Publication of EP0817915B1 publication Critical patent/EP0817915B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/042—The valves being provided with fuel passages
    • F02M61/045—The valves being provided with fuel discharge orifices
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • the invention is based on a fuel injection valve for internal combustion engines according to the preamble of claim 1.
  • a valve member is axially displaceably guided in a bore in a valve body.
  • the valve member has a valve head at its end protruding from the bore of the valve body on the combustion chamber side, the annular end surface of the valve facing away from the combustion chamber and delimiting a pressure chamber delimits the pressure chamber
  • High pressure fuel can be applied.
  • the high-pressure fuel acting on the pressure chamber moves the valve member outward against the restoring force of a valve spring into an opening stroke position.
  • At least one injection channel is provided in the valve head, which, starting from the pressure chamber, opens into an outlet opening on the peripheral wall of the valve head, which is closed by the valve body in the closed position of the valve member and in the open stroke position of the valve body Valve member emerges from the overlap with the bore wall of the valve body, so that the fuel from the pressure chamber for injection into the combustion chamber of the internal combustion engine to be supplied.
  • the injection bore is subdivided into at least two or more parallel channels, which are separated from one another by a partition and are released one after the other by the control edge on the valve body during the opening stroke of the valve member.
  • This described channel geometry of the injection bore produces a relatively long concentrated injection jet which penetrates deep into the combustion chamber of the internal combustion engine to be supplied.
  • a small stroke volume approximately 250-300 cm /
  • the fuel injection valve for internal combustion engines according to the invention with the characterizing features of claim 1 has the advantage that the injection jet generated has a short depth of penetration and high atomization quality, so that it is well suited for combustion chambers of small diameter and small stroke volume.
  • the spray geometry is advantageously designed so that the pressure conversion of the jet always takes place at the control edge of the valve body, which is still immersed in the outlet cross section of the injection bore even when the valve member is at its maximum opening stroke.
  • the injection bores are arranged approximately at right angles to the valve member axis. Since the constant deflection of the jet path at the control edge is approximately 15 °, a jet cone of 150 ° is created with several injection openings over the circumference of the valve head.
  • the described effect of a very short spray hole occurs particularly clearly when the outlet cross section of the injection bore is opened only slightly, at most up to 50%.
  • injection channels or outlet or spray cross sections on the valve head of the valve member depends on the particular requirements of the internal combustion engine to be supplied, the outlet cross sections on the valve head advantageously being evenly distributed over the circumference of the valve head. Further advantages and advantageous configurations of the subject matter of the invention can be found in the description, the drawing and the claims.
  • FIG. 1 shows a longitudinal section through the fuel injection valve in maximum
  • FIG. 2 shows an enlarged section from FIG. 1 in the region of the valve member head
  • FIG. 3 shows an enlarged representation of the injection cross section and the jet course of the injection jet.
  • the fuel injection valve for internal combustion engines shown in FIG. 1 has a valve body 1 which is clamped to a valve holding body 5 by means of a union nut 3.
  • a piston-shaped valve member 9 is axially displaceably guided in a bore 7 in the valve body 1 and has a valve head 11 acting as a closing head at its lower end, which projects into the combustion chamber of the internal combustion engine to be supplied.
  • the valve head 11 shown enlarged in FIG. 2 has a conical valve sealing surface 13 facing the valve body 1, which in the exemplary embodiment is formed by an annular end surface of a seat ring 15 placed on the valve head 11 and which has a correspondingly conical valve seat surface 17 on the combustion chamber side end surface of the Valve body 1 interacts.
  • the section of the valve head 11 projecting into a diameter-enlarged bore part 19 of the bore 7 of the valve body 1 is designed as a piston slide which is guided in the bore part 19 and with it the combustion chamber facing away from the annular end face 21 a pressure chamber 23 in the valve body 1.
  • This pressure chamber 23 is connected via an annular gap 25 between the shaft 27 of the valve member 9 and the wall of the bore 7 to a collecting chamber 29, in which, on the other hand, the valve body 1 and the
  • Ventilhaitek ⁇ rper 5 penetrating inlet line 31 opens, which can be connected to a fuel injection pump, through which the pressure chamber 23 is alternately acted upon by high fuel pressure.
  • a valve spring 33 is inserted into a spring chamber 35 in the valve holding body 5, which is supported via a ring insert 37 and a slotted stop ring 39 on the end face of the valve body 1 facing away from the combustion chamber and which via an end facing away from the combustion chamber
  • Valve member 9 arranged retaining ring 41 and a shim 43 acts on the valve member 9.
  • the stem of the valve member 9 has a stop collar 45 at the level of the stop ring 39
  • the closed position of the valve member 9 has a certain distance from the stop ring 39 which determines the total opening stroke and with which the valve member 9 comes into contact with the stop ring 39 after reaching the maximum opening stroke position.
  • valve head 11 of the valve member 9 For injecting the fuel under high pressure into the combustion chamber (not shown) of the internal combustion engine to be supplied, in the valve head 11 of the valve member 9 there is at least one (in the exemplary embodiment three) discharge channel 47 leading away from the pressure chamber 23 and having an outlet cross section 49 on the peripheral wall of the valve head 11 forms, which is arranged so that it is completely closed when the valve member 9 the bore wall 19 of the valve body 1 is covered and during the outward opening stroke of the valve member 9 is opened by a lower control edge 51 arranged at the combustion chamber end of the valve body 1.
  • This control edge 51 on the valve body 1, shown enlarged in FIGS. 2 and 3, is formed by the ring edge between the valve seat surface 17 and the wall of the bore 19 in the valve body 1.
  • the injection channel 47 in the valve head 11 is formed by an inlet bore 53 starting from the upper annular end face 21 of the valve head 11, which is arranged inclined to the valve member axis, and an injection bore 55 leading radially away from this, which on the other hand opens onto the peripheral wall of the valve head 11 and there Exit cross section 49 forms.
  • Injection bore 55 is perpendicular to the valve member axis and has a rectangular cross-sectional shape.
  • the axial extent of the outlet opening at the outlet cross section 49 is dimensioned such that the valve sealing surface 13 on the support ring 15 is at a certain axial distance from the lower edge of the outlet cross section 49 on the combustion chamber side.
  • the fuel injection valve according to the invention works in the following way.
  • the valve spring 33 holds the valve member 9 with its valve sealing surface 13 in contact with the valve seat surface 17 on the valve body 1, the outlet cross section 49 of the injection channel 47 being in this closed position completely from the bore wall of the valve body 1 is closed.
  • the pump delivered by the high-pressure injection pump gets under high-pressure fuel via the inlet line 31, the collecting chamber 29 and the annular gap 25 into the pressure chamber 23. There, the high-pressure fuel acts on the annular end face 21 and thus displaces the valve member 9 against the restoring force of the valve spring 33 from the valve seat 17.
  • the outlet cross section 49 emerges of the injection channel 47 after passing through a short forward stroke from the overlap with the bore wall of the valve body 1, so that the outlet cross section 49 is opened by the control edge 51 of the valve body 1 and the fuel for injection reaches the combustion chamber of the internal combustion engine.
  • the outlet cross-section 49 is only partially opened, as shown in FIG. 3, up to a maximum of 50%.
  • the pressure conversion of the injection jet always takes place at the control edge 51, so that the effect of an extremely short spray hole length occurs.
  • the beam deflection of 15 ° is provided at the control edge 51 in such a way that a beam cone angle ⁇ of approximately 150 ° is created over the evenly distributed multiple outlet cross sections 49.
  • a maximum opening height of 50% of the total opening cross section at the outlet cross section 49 is ensured by the fixed distance between the stop collar 45 on the valve member 9 and the stop ring 39 in the closed position of the injection valve. The end of the high pressure injection takes place through the

Landscapes

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

Abstract

L'invention concerne une soupape d'injection de carburant pour moteurs à combustion interne, qui comprend un élément (9) situé dans l'alésage (7) d'un corps de soupape (1) déplaçable dans le sens axial sous l'effet de la pression du carburant à l'encontre de la force de rappel d'un ressort. Cet élément (9) présente un chapeau de soupape (11) en forme de piston dans lequel il est prévu au moins un canal d'injection (47) partant d'une chambre de pression (23) délimitée dans l'alésage (7). Lorsque l'élément (9) est en position fermée, au niveau de la surface périphérique du chapeau de soupape (11), la section de sortie (49) de ce canal d'injection est entièrement recouverte par le corps de la soupape (1). Pendant la course d'ouverture dirigée vers l'extérieur, ladite section de sortie (11) est ouverte par une arête de commande (51) inférieure située à l'extrémité du corps de soupape (1), côté chambre de combustion. Pour produire un jet d'injection bref et bien pulvérisé, la section de sortie (49) n'est ouverte que partiellement, au maximum à 50 %, par l'arête de commande (51) inférieure du corps de soupape (1).
EP96942256A 1996-01-25 1996-09-26 Soupape d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0817915B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19602615 1996-01-25
DE19602615A DE19602615A1 (de) 1996-01-25 1996-01-25 Kraftstoffeinspritzventil für Brennkraftmaschinen
PCT/DE1996/001875 WO1997027397A1 (fr) 1996-01-25 1996-09-26 Soupape d'injection de carburant pour moteurs a combustion interne

Publications (2)

Publication Number Publication Date
EP0817915A1 true EP0817915A1 (fr) 1998-01-14
EP0817915B1 EP0817915B1 (fr) 2001-12-19

Family

ID=7783646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96942256A Expired - Lifetime EP0817915B1 (fr) 1996-01-25 1996-09-26 Soupape d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
EP (1) EP0817915B1 (fr)
JP (1) JPH11502587A (fr)
KR (1) KR19980703221A (fr)
DE (2) DE19602615A1 (fr)
WO (1) WO1997027397A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642440A1 (de) * 1996-10-15 1998-04-16 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19941930A1 (de) 1999-09-03 2001-03-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522550A (en) * 1992-06-10 1996-06-04 Robert Bosch Gmbh Injection nozzle for internal combustion engines
DE4310154A1 (de) * 1993-03-29 1994-10-06 Bosch Gmbh Robert Kraftstoff-Einspritzdüse für Brennkraftmaschinen
DE4340883A1 (de) * 1993-12-01 1995-06-08 Bosch Gmbh Robert Kraftstoff-Einspritzdüse für Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9727397A1 *

Also Published As

Publication number Publication date
EP0817915B1 (fr) 2001-12-19
DE19602615A1 (de) 1997-07-31
WO1997027397A1 (fr) 1997-07-31
JPH11502587A (ja) 1999-03-02
DE59608504D1 (de) 2002-01-31
KR19980703221A (ko) 1998-10-15

Similar Documents

Publication Publication Date Title
EP0918927B1 (fr) Soupape d'injection, notamment pour injecter du carburant directement dans la chambre de combustion d'un moteur a combustion interne
DE2711350A1 (de) Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE19547423A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE2749378A1 (de) Kraftstoffeinspritzduese
EP0538247A1 (fr) Soupape d'injection de carburant.
DE4035312A1 (de) Vorrichtung zur einspritzung eines brennstoff-gas-gemisches
DE19523243A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE8632002U1 (de) Kraftstoffeinspritzventil
DE3005857A1 (de) Kraftstoffeinspritzduese
DE19847460A1 (de) Kraftstoffeinspritzdüse für selbstzündende Brennkraftmaschinen
EP0619426B1 (fr) Buse d'injection de combustible pour moteurs à combustion interne
DE10115216A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19829553A1 (de) Druckventil
EP0890735A2 (fr) Soupape d'injection de combustible
EP1409867B1 (fr) Soupape d'injection de carburant
EP1373710A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE19716226A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP0646218B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE2310326A1 (de) Kraftstoff-einspritzduese fuer verbrennungskraftmaschinen
WO1997027397A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
EP0977945A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE19706661A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE2444597C2 (fr)
DE3506729C2 (fr)
DE19638339B4 (de) Kraftstoffeinspritzventil für 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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19980202

17Q First examination report despatched

Effective date: 19991123

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REF Corresponds to:

Ref document number: 59608504

Country of ref document: DE

Date of ref document: 20020131

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

Effective date: 20020314

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

Ref country code: GB

Payment date: 20020828

Year of fee payment: 7

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

Ref country code: DE

Payment date: 20021025

Year of fee payment: 7

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

Ref country code: GB

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

Effective date: 20030926

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: 20040401

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

Effective date: 20030926

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: 20050926