EP0656475B1 - Kraftstoffeinspritzdüse mit Nadelstellungsfühler - Google Patents
Kraftstoffeinspritzdüse mit Nadelstellungsfühler Download PDFInfo
- Publication number
- EP0656475B1 EP0656475B1 EP94117583A EP94117583A EP0656475B1 EP 0656475 B1 EP0656475 B1 EP 0656475B1 EP 94117583 A EP94117583 A EP 94117583A EP 94117583 A EP94117583 A EP 94117583A EP 0656475 B1 EP0656475 B1 EP 0656475B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- magnet
- fuel injection
- injection nozzle
- compression spring
- 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
- 239000000446 fuel Substances 0.000 title claims description 15
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
Definitions
- the invention relates to a fuel injector with a needle position sensor for internal combustion engines according to the preamble of the claim 1.
- Injection nozzle of this type is for recognizing the start of injection and the Injection duration a detecting the stroke movement of the valve needle Hall sensor built in by the magnetic field one with the valve needle moving magnet is affected.
- the Hall sensor is finished a collar sleeve arranged in the by the helical compression spring surrounding cavity protrudes against the extension with the magnet, and the connecting cable runs in and through the housing.
- the Hall sensor is in the end portion of the Blind hole trained passage arranged in the housing and through a thin wall between the blind hole and the compression coil spring receiving chamber separated from the magnet.
- the fuel injector according to the invention with the characteristic Features of claim 1 has the advantage that the Hall sensor influencing magnet in relation to the arrangement of the Hall sensor is guided axially precisely, so that a flawless Measurement of the movement of the valve needle is guaranteed.
- FIG. 1 shows a fuel injector with a needle position sensor in the Longitudinal section
- Figure 2 shows a section of the fuel injector with the area of the needle position sensor on an enlarged scale in longitudinal section.
- the fuel injection nozzle has a nozzle body 11, which means a union nut 12 via an washer 13 on a nozzle holder 15 is clamped.
- a helical compression spring 18 is in a blind bore trained spring chamber 21 arranged in the nozzle holder 15, at the end 22 opposite the nozzle body 11 it over a spacer 23 and a guide bushing 24 trained intermediate member supports.
- An extension 26 of the Pressure pin 19 passes through the cavity of the helical compression spring 18 and is with its end portion in an axial bore 25 Guide bushing 24 slidably mounted.
- An inlet channel 27 for fuel runs through the nozzle holder into the nozzle body 11.
- a leak oil bore 28 connects via an extension 29 the end 22 of the spring chamber 21.
- the Hall sensor 32 lies with its sensor side on the End 22 of the spring chamber 21 abutting end face 34 of the intermediate member 24 immovable on. He is with one end of a conductor wire containing cable 35 connected, the other end one carries connector, not shown.
- the end section of the Cable 35 with the Hall sensor 32 passes through the circumference of the Nozzle holder 15 outgoing, obliquely into the end 22 of the spring chamber 21 leading bore 36 and is surrounded by a sleeve-shaped plug 37, which also partially surrounds the Hall sensor 32.
- the plug 37 sits tightly in the bore 36 and is with a, on a shoulder 38 attacking clamping piece 41 fixed immovably in the nozzle holder 15.
- the end region protruding from the bore 36 and acted upon by the clamping piece 41 39 of the plug 37 lies in a longitudinal groove 42 of the Nozzle holder 15.
- An O-ring 43 in an annular groove 44 of the plug 37 seals against splash water.
- This O-ring 43 can be omitted for an injection nozzle without leakage oil discharge; instead and the drain hole 28 is in an annular groove 45 in the circumference the guide bush 24 an O-ring 46 is arranged, and the axial bore 25 designed as a blind hole.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims (6)
- Kraftstoffeinspritzdüse mit Nadelstellungsfühler für Brennkraftmaschinen, mit einem zwischen einer Schließ- und einer Offenstellung in einem Düsenkörper (11) verschiebbaren Ventilglied (17), mit einer das Ventilglied in Schließrichtung belastenden Schraubendruckfeder (18), mit einem den Düsenkörper tragenden Gehäuse (15), in dem zur Aufnahme der Schraubendruckfeder eine Kammer angeordnet ist, an deren dem Düsenkörper gegenüberliegenden Ende sich die Schraubendruckfeder über ein Zwischenglied (24) abstützt, mit einem Magneten (31) an einer mit der Ventilnadel bewegten Verlängerung in der Kammer, und mit einem dem bewegbaren Magneten ortsfest zugeordneten Hall-Sensor (32), der an einem Leiterkabel (35) befestigt ist, welches einen sich im Gehäuse von der Außenseite her zum besagten Ende der Kammer erstreckenden Durchgang (36) durchsetzt, dadurch gekennzeichnet, daß das die Schraubendruckfeder (18) stützende Zwischenglied als Führungsbuchse (24) ausgebildet ist, in deren Bohrung (25) die Verlängerung (26) mit dem darauf befestigten Magneten (31) verschiebbar geführt ist und in dem der Magnet (31) beim Hub der Ventilnadel (17) sich bewegt, und daß der Hall-Sensor (32) in dem an die Kammer (21) angrenzenden Endabschnitt des Durchgangs (36) angeordnet ist und mit seiner Sensorseite an der am besagten Ende (22) der Kammer (21) anliegenden Stirnseite (34) der Führungsbuchse (24) anliegt.
- Kraftstoffeinspritzdüse nach Anspruch 1, dadurch gekennzeichnet, daß der Durchgang in Form einer Bohrung (36) von der Umfangsfläche des Gehäuses (15) zum Ende (22) der Kammer (21) schräg verläuft und daß der Eingang der Bohrung (36) durch eine nutartige Aussparung (42) erweitert ist.
- Kraftstoffeinspritzdüse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der an den Hall-Sensor (32) anschließende Abschnitt (39) des Kabels (35) von einem stramm in der Bohrung (36) sitzenden Stopfen (37) umgeben ist.
- Kraftstoffeinspritzdüse nach Anspruch 3, dadurch gekennzeichnet, daß der Stopfen (37) von einer Klemmeinrichtung (41) in der Aussparung (42) gesichert ist.
- Kraftstoffeinspritzdüse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die den Magneten (31) tragende Verlängerung (26) die gesamte Länge des von der Schraubendruckfeder (18) umgebenden Hohlraums durchsetzt.
- Kraftstoffeinspritzdüse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Führungsbuchse (24) für den Magneten (31) aus einem nicht magnetisierbaren Material besteht.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4341102 | 1993-12-02 | ||
| DE4341102A DE4341102A1 (de) | 1993-12-02 | 1993-12-02 | Kraftstoffeinspritzdüse mit Nadelstellungsfühler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0656475A1 EP0656475A1 (de) | 1995-06-07 |
| EP0656475B1 true EP0656475B1 (de) | 1998-02-04 |
Family
ID=6504018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94117583A Expired - Lifetime EP0656475B1 (de) | 1993-12-02 | 1994-11-08 | Kraftstoffeinspritzdüse mit Nadelstellungsfühler |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0656475B1 (de) |
| JP (1) | JPH07189870A (de) |
| DE (2) | DE4341102A1 (de) |
| ES (1) | ES2112465T3 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19618650B4 (de) * | 1996-05-09 | 2006-04-27 | Robert Bosch Gmbh | Verfahren zur Herstellung eines Kraftstoffeinspritzventils für Brennkraftmaschinen |
| GB2340610A (en) * | 1998-08-18 | 2000-02-23 | Lucas Ind Plc | Needle lift sensor |
| DE19938208A1 (de) * | 1999-08-12 | 2001-03-01 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| CN105143649B (zh) * | 2013-03-11 | 2019-03-08 | 韦恩州立大学 | 内燃机中的预测校正 |
| CN104595079B (zh) * | 2014-12-03 | 2017-03-01 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 共轨喷油器总成油嘴针阀升程测量方法及霍尔传感器测头 |
| GB2549747A (en) * | 2016-04-27 | 2017-11-01 | Delphi Int Operations Luxembourg Sarl | Fuel injector |
| DE102023203231A1 (de) | 2023-04-06 | 2024-10-10 | Volkswagen Aktiengesellschaft | Positionssensor für ein Ventil und ein Verfahren zur Positionsmessung eines Ventils |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1549768A (en) * | 1975-08-02 | 1979-08-08 | Lucas Industries Ltd | Movement transducers |
| WO1982001069A1 (en) * | 1980-09-15 | 1982-04-01 | G Wolff | Needle position sensing system for needle and poppet valve fuel injectors |
| DE3227989A1 (de) * | 1982-07-27 | 1984-02-02 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
| DE4301978A1 (de) * | 1993-01-26 | 1994-07-28 | Andreas Koch | Brennstoffeinspritzdüse mit einer Anordnung zur Messung des Verschiebeweges einer Düsennadel |
-
1993
- 1993-12-02 DE DE4341102A patent/DE4341102A1/de not_active Withdrawn
-
1994
- 1994-11-08 ES ES94117583T patent/ES2112465T3/es not_active Expired - Lifetime
- 1994-11-08 EP EP94117583A patent/EP0656475B1/de not_active Expired - Lifetime
- 1994-11-08 DE DE59405225T patent/DE59405225D1/de not_active Expired - Fee Related
- 1994-11-30 JP JP6297077A patent/JPH07189870A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07189870A (ja) | 1995-07-28 |
| DE59405225D1 (de) | 1998-03-12 |
| EP0656475A1 (de) | 1995-06-07 |
| ES2112465T3 (es) | 1998-04-01 |
| DE4341102A1 (de) | 1995-06-08 |
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