EP1044327B1 - Kraftstoffeinspritzventil für brennkraftmaschinen - Google Patents
Kraftstoffeinspritzventil für brennkraftmaschinen Download PDFInfo
- Publication number
- EP1044327B1 EP1044327B1 EP99938165A EP99938165A EP1044327B1 EP 1044327 B1 EP1044327 B1 EP 1044327B1 EP 99938165 A EP99938165 A EP 99938165A EP 99938165 A EP99938165 A EP 99938165A EP 1044327 B1 EP1044327 B1 EP 1044327B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- opening
- pressure duct
- valve body
- 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
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
- 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
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of injectors
-
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
Definitions
- the invention is based on a fuel injection valve for Internal combustion engine according to the preamble of claim 1 out.
- Al known fuel injection valve is a piston-shaped Valve member axially displaceable against a closing force guided in a guide bore of a valve body, the with its one end into a combustion chamber of the to be supplied Internal combustion engine protrudes.
- the valve member its combustion chamber side face a conical Valve sealing surface on which it is used to control a fürflußquer4.000es to an injection opening in the Combustion chamber of the internal combustion engine to be supplied with a fixed conical valve seat surface at the closed end the guide bore in the valve body cooperates.
- the Injection opening is as one of the valve seat surface outgoing injection hole formed.
- the valve member has on its shaft on a pressure shoulder, at the one Pending fuel high pressure in the opening direction of Valve member against a closing force of a valve spring attacks.
- the pressure shoulder of the valve member protrudes a pressure chamber, which by a cross - sectional widening of Guide bore is formed.
- This pressure room opens Pressure channel, which from a combustion chamber remote axial End face of the valve body goes out and due to its radially outwardly arranged entrance obliquely to the axis of the Valve body runs.
- This pressure channel is over corresponding supply lines to a High-pressure fuel pump connected, so that the High-pressure fuel via the pressure channel in the pressure chamber is initiated.
- US 3,511,442 is a generic fuel injection valve known in which the pressure chamber for improved uptake of Inlet opening of the pressure channel formed radially on one side is.
- the known fuel injection valves have this the disadvantage that already by a slight eccentric position of the valve member some Injections during the opening stroke of the valve member especially with a small valve member opening stroke, largely remain closed while the inflow to the rest Injection openings largely unthrottled occurs. This has an uneven fuel injection at the Fuel injection valve results, in particular reinforced forms at so-called hole nozzles. It will the effect described in the known Fuel injection valves supported by the Outlet opening of the pressure channel in the pressure chamber in the middle the valve member is aligned so that dynamically Transverse force acts on the valve member, the valve member one-sided pushes and so their necessary centric position for a uniform Injection jet formation impaired.
- the inventive position of the pressure channel is at a so-called seat hole nozzle described in the embodiment, but it can also be done on all others Fuel injection valve types, for example blind-hole nozzles, Dowel nozzles and so on, used where one Tilting or tilting of the valve member the Fuel injection at the injection ports impaired. Since the described impairment has a particularly strong effect on small valve lift stages, In addition, it is particularly advantageous for the invention Arrangement of the pressure channel to fuel injection valves use that with two opening handles, for example so-called two spring holder nozzles, work.
- FIG. 1 shows a longitudinal section through the combustion chamber side part of the fuel injection valve
- FIG. 2 shows an enlarged detail of FIG Injector of Figure 1 in the region of the pressure channel
- 3 shows a cross section through the figure 2 in height of Inlet opening of the pressure channel in the pressure chamber.
- the fuel injection valve shown in the figure 1 for internal combustion engines has a valve body 1, the with its lower end in the combustion chamber one not closer illustrated internal combustion engine protrudes and one, from its upper, brennraumfernen end face 3 outgoing has central bore 5.
- This as a blind hole trained hole 5 acts as axial Guide bore for a piston-shaped valve member 7, the at least in an upper combustion chamber remote section slidably sealingly guided in the bore 5.
- the valve member 7 at its lower, combustion chamber facing end of a conically shaped Valve sealing surface 9 on, with which it is conical shaped valve seat surface 11 on the valve body. 1 interacts, which are closed at the inside End of the bore 5 is formed.
- valve seat surface 11 From this valve seat surface 11 also performs an injection port 13, on the other hand opens into the combustion chamber of the internal combustion engine.
- the Valve member 7 further has on its shaft an in Opening direction of the valve member 7 acting pressure shoulder 15, which is due to a cross-sectional reduction of Pressure valve member 7 in the direction of the combustion chamber end is formed.
- the pressure shoulder 15 of the Valve member 7 in a pressure chamber 17, which by a radial extension of the bore 5 is formed, and the via an annular channel 19 to the valve seat surface 11th extends.
- a pressure channel 21 in Valve body 1 is provided, the radially outward of the bore. 5 in the combustion chamber remote end face 3 of the valve body. 1 entering and obliquely to the axis of the valve body 1 extending enters the radially outer region of the pressure chamber 17.
- the inclined pressure channel 21 In order to make a lateral impact of the through the pressure channel 21 in the pressure chamber 17 incoming fuel jet the valve member 7 and the associated Querkraftein effet to avoid the valve member 7 is the inclined pressure channel 21 also eccentric pivoted. It is as in Figures 2 and 3 shown, an outlet opening 23 of the pressure channel 21 in the pressure chamber 17 from a common longitudinal sectional plane with an inlet opening 25 of the pressure channel 21 at the top Swung out end face 3. The inlet opening 25 of the Pressure channel 21 and the outlet opening 23 are now in two, the longitudinal axis of the valve body 1 intersecting arranged in different longitudinal sections, the pivoted to each other about the longitudinal axis of the valve body 1 are.
- the swivel angle ⁇ between a first Longitudinal section 27 through the inlet opening 25 and a second longitudinal section plane 29 through the outlet opening 23rd the pressure channel 21 is approximately in the embodiment 35 °, but may alternatively be smaller or larger be educated. It is essential only that the Pressure channel 21 forming inclined bore is pivoted so that whose outlet opening 23 is arranged in the pressure chamber 17 is that emerging from the pressure channel 21 Fuel jet off-center to the valve member 7 in the Pressure chamber 17 enters, so that this is not the valve member meets laterally and also a rotational flow in the Pressure chamber 17 generated.
- the fuel injection valve according to the invention Internal combustion engine operates in a known manner, the Valve member 7 first of a closing force, preferably a valve spring is held in the closed position, in which the Valve sealing surface 9 on the valve member 7 sealingly on the fixed valve seat surface 11 is applied, so that the Fuel flow from the annular channel 19 to Injection opening 13 is closed. Should one High pressure fuel injection take place at the injection valve, flows under high pressure fuel from one external high-pressure fuel injection pump over not shown pressure lines in the pressure channel 21 and further in the pressure chamber 17 and engages there in the opening direction of the Valve member 7 on the pressure shoulder 15 at.
- a closing force preferably a valve spring
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
Description
Claims (3)
- Kraftstoffeinspritzventil für Brennkraftmaschinen mit einem in einer Bohrung (5) eines Ventilkörpers (1) entgegen einer Schließkraft axial verschiebbaren Ventilglied (7), das an seiner brennraumseitigen Stirnfläche eine Ventildichtfläche (9) aufweist, mit der es zur Steuerung eines Durchflußquerschnittes zu einer Einspritzöffnung (13) in den Brennraum der Brennkraftmaschine mit einer ortsfesten Ventilsitzfläche (11) zusammenwirkt, sowie mit einer am Ventilglied (7) angeordneten, in Ventilgliedöffnungsrichtung wirkenden Druckschulter (15), die in einen Druckraum (17) ragt, der über einen Druckkanal (21) mit Kraftstoffhochdruck befüllbar ist, wobei der schräg zur Ventilkörperachse angeordnete Druckkanal (21) ausgehend von einer brennraumabgewandten Stirnfläche (3) des Ventilkörpers (1) in einen radial äußeren Bereich des Druckraumes (17) mündet, dadurch gekennzeichnet, daß eine Eintrittsöffnung (25) des Druckkanals (21) in die brennraumabgewandte Stirnfläche (3) des Ventilkörpers (1) und eine Austrittsöffnung (23) des Druckkanals (21) in den Druckraum (17) in zwei, die Längsachse des Ventilkörpers (1) schneidenden Längsschnittebenen angeordnet sind, die zueinander um die Längsachse des Ventilkörpers (1) verschwenkt sind, wobei der Druckkanal (21) als gerade Schrägbohrung ausgebildet ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß der Druckkanal (21) als Schrägbohrung ausgebildet ist, deren Austrittsöffnung (23) in den Druckraum (17) derart verschwenkt ist, daß der aus dem Druckkanal (21) austretende Kraftstoffstrahl außermittig zum Ventilglied (7) gerichtet ist.
- Kraftstoffeinspritzventil nach Anspruch 1, dadurch gekennzeichnet, daß die Austrittsöffnung (23) des Druckkanals (21) den Druckraum (17) an seiner Umfangswand anschneidet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19841158A DE19841158A1 (de) | 1998-09-09 | 1998-09-09 | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19841158 | 1998-09-09 | ||
PCT/DE1999/001704 WO2000014398A1 (de) | 1998-09-09 | 1999-06-11 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1044327A1 EP1044327A1 (de) | 2000-10-18 |
EP1044327B1 true EP1044327B1 (de) | 2005-09-07 |
Family
ID=7880341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99938165A Expired - Lifetime EP1044327B1 (de) | 1998-09-09 | 1999-06-11 | Kraftstoffeinspritzventil für brennkraftmaschinen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6367717B1 (de) |
EP (1) | EP1044327B1 (de) |
JP (1) | JP2002524684A (de) |
DE (2) | DE19841158A1 (de) |
WO (1) | WO2000014398A1 (de) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3511442A (en) * | 1968-02-29 | 1970-05-12 | Ambac Ind | Sumpless fuel injection nozzle |
DE2261726C2 (de) * | 1972-12-16 | 1985-10-10 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Kraftstoffeinspritzventil für Brennkraftmaschinen |
EP0363142A1 (de) * | 1988-10-04 | 1990-04-11 | LUCAS INDUSTRIES public limited company | Brennstoffeinspritzdüsen für Brennkraftmaschinen |
US5207385A (en) * | 1989-10-26 | 1993-05-04 | Lucas Industries Public Limited Company | Fuel injection nozzle |
DE4303813C1 (de) * | 1993-02-10 | 1994-06-30 | Bosch Gmbh Robert | Kraftstoffeinspritzdüse für Brennkraftmaschinen |
US5449121A (en) * | 1993-02-26 | 1995-09-12 | Caterpillar Inc. | Thin-walled valve-closed-orifice spray tip for fuel injection nozzle |
GB9425652D0 (en) * | 1994-12-20 | 1995-02-22 | Lucas Ind Plc | Fuel injection nozzle |
DE19507171C1 (de) * | 1995-03-02 | 1996-08-14 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
FI101170B (fi) * | 1995-06-15 | 1998-04-30 | Waertsilae Nsd Oy Ab | Polttoaineen ruiskutusventtiilin ohjausjärjestely |
DE19523243B4 (de) * | 1995-06-27 | 2009-04-02 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschinen mit einer Spannmutter mit konisch ausgebildeter Ringschulter |
US5899389A (en) * | 1997-06-02 | 1999-05-04 | Cummins Engine Company, Inc. | Two stage fuel injector nozzle assembly |
-
1998
- 1998-09-09 DE DE19841158A patent/DE19841158A1/de not_active Withdrawn
-
1999
- 1999-06-11 WO PCT/DE1999/001704 patent/WO2000014398A1/de active IP Right Grant
- 1999-06-11 DE DE59912526T patent/DE59912526D1/de not_active Expired - Fee Related
- 1999-06-11 JP JP2000569117A patent/JP2002524684A/ja active Pending
- 1999-06-11 US US09/554,010 patent/US6367717B1/en not_active Expired - Fee Related
- 1999-06-11 EP EP99938165A patent/EP1044327B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1044327A1 (de) | 2000-10-18 |
JP2002524684A (ja) | 2002-08-06 |
DE19841158A1 (de) | 2000-03-16 |
US6367717B1 (en) | 2002-04-09 |
WO2000014398A1 (de) | 2000-03-16 |
DE59912526D1 (de) | 2005-10-13 |
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