EP0994250A2 - High-pressure sensor - Google Patents

High-pressure sensor Download PDF

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Publication number
EP0994250A2
EP0994250A2 EP99810565A EP99810565A EP0994250A2 EP 0994250 A2 EP0994250 A2 EP 0994250A2 EP 99810565 A EP99810565 A EP 99810565A EP 99810565 A EP99810565 A EP 99810565A EP 0994250 A2 EP0994250 A2 EP 0994250A2
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EP
European Patent Office
Prior art keywords
welding
threaded body
pressure sensor
sensor according
measuring head
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
EP99810565A
Other languages
German (de)
French (fr)
Other versions
EP0994250A3 (en
EP0994250B1 (en
Inventor
Kurt Vollenweider
Hans Conrad Sonderegger
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.)
Kistler Holding AG
Original Assignee
KK Holding AG
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Filing date
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Publication of EP0994250A3 publication Critical patent/EP0994250A3/en
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    • 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

Definitions

  • the invention relates to high pressure sensors, e.g. in Injection systems for internal combustion engines or liquid jet cutting machines etc., especially where pulsating hydraulic Pressures to measure or peak at thousands of bar are control.
  • the invention relates to surveillance systems of diesel engines, where peak values from 2000 to 3000 bar are to be measured.
  • Fig. 1 represents a commercially available piezoresistive high pressure sensor consists of the four main parts: threaded body 1, Measuring head 2, membrane part 3, on which the measuring bridge 4 is applied is.
  • Fig. 2 is the threaded body 5, the sealing section 6 and the membrane part 7, on which the capacitive measuring part 8 is mounted, in one piece executed.
  • the membrane part 11 with the sealing section 10 is in one piece executed and welded to the sealing body 10 with the threaded body 9.
  • the measuring bridge 12 consists of a silicone element that is blown onto the membrane part 11.
  • the Prior Art pressure sensors are currently for max. Designed for pressures of 1500 bar and in use.
  • the main idea of the invention relates to the overall view of the hydraulic and mechanical part to make it permanently reliable Find a solution suitable for monitoring purposes.
  • the pressure sensor consists of the 6 main parts: Threaded body 16 Measuring head 14 Membrane section 21 Measuring bridge 22 Sealing section 20th Welding section 15 all of which are coordinated with one another with regard to mechanically permissible material tensions.
  • the membrane section 21 is determined by the parameters ⁇ D 1 , ⁇ D 3 and thickness t.
  • Minimum diameters d of the feed line are also of great importance 19 and the sealing section 20 in order to minimize material stresses to reach.
  • the further part of the invention is directed to the design of the Welding section 15, the execution of which is decisive for safe Continuous operation of the pressure sensor. Long series of tests have shown that welding gaps from the inside, i.e. from the pressure side, below must be prevented in all circumstances.
  • Fig. 5 shows the welding process by means of internal welding in Sweat start moment.
  • the dimensions are according to known regulations of electrical butt welding technology, where the measuring head 14 held by the electrode 32 and electrically connected is.
  • the fusion begins along the Welding cone surface 30, with pressure neck part 24 and welding cone 30 flow into one another, the welding path S being used up.
  • Fig. 6 shows the state after the internal welding, the Welding path S through the pressure welding to the external welding gap 36 was reduced.
  • the welding zone 34 has a transition radius 35, which is free of internal gaps. So that the pressure impulses find no attack surfaces from the inside due to the notch effect can lead to tears.
  • the remaining outer welding gap 36 is in another Operation with laser, gas or electron beam welding closed.
  • the design of the balloon-like pressure measuring space according to the invention with print head part 23 and print neck part 24, with the combined Internal welding to prevent tearing from the inside, and the external welding, to ensure the mechanical strength the connection of the measuring head 14 with the threaded body 16 and the smallest possible diameter d of the feed line 19 is Basis for a high pressure sensor for continuous operation with peak pressures created up to 2500 bar.
  • the design of the membrane section 21 applied measuring bridge 22 can be based on various known technologies.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
  • Glass Compositions (AREA)

Abstract

The sensor has a balloon-shaped measurement chamber divided into a pressure head part (23) with larger dia. and a pressure neck part (24) with smaller dia. and welded to a threaded body (16). The joint (15) between the measurement head and the threaded body is designed to have no weld gaps on the pressure side which could lead to migrating cracks as a result of the notch effect. An Independent claim is also included for an arrangement for implementing the method.

Description

Die Erfindung bezieht sich auf Hochdruck-Sensoren, wie sie z.B. in Einspritzsystemen von Verbrennungsmotoren oder Flüssigkeitsstrahl-Schneidemaschinen usw., insbesondere wo pulsierende hydraulische Drücke mit Spitzenwerten von tausenden von bar zu messen oder zu kontrollieren sind.The invention relates to high pressure sensors, e.g. in Injection systems for internal combustion engines or liquid jet cutting machines etc., especially where pulsating hydraulic Pressures to measure or peak at thousands of bar are control.

Im besonderen bezieht sich die Erfindung auf Überwachungssysteme von Dieselmotoren, wo im Dauerbetrieb Spitzenwerte von 2000 bis 3000 bar zu messen sind.In particular, the invention relates to surveillance systems of diesel engines, where peak values from 2000 to 3000 bar are to be measured.

Durch die Leistungssteigerung, die fast ausnahmslos mit Turboaufladung gekoppelt ist, sind immer grössere Brennstoffmengen in immer kürzerer Zeit zu verbrennen, wodurch in den letzten Jahren die Einspritzdrücke kontinuierlich gesteigert werden mussten. So sind heute Hochleistungsmotoren mit 3000 bar Einspritzdruck bekannt.Through the increase in performance, almost without exception with turbocharging coupled, there are always larger amounts of fuel in ever burn less time, causing the in recent years Injection pressures had to be increased continuously. So are known today as high-performance engines with 3000 bar injection pressure.

In den sogenannten Common Rail Systemen von Personenwagen Dieselmotoren, werden z.Z. Spitzendrücke von max. 1500 bar verwendet. Für die Überwachung solcher Anlagen sind eine Reihe von Hochdruck-Sensoren bekannt geworden, die in Fig. 1 bis 3 als Prior Art dargestellt sind.In the so-called common rail systems of passenger car diesel engines, are currently Peak pressures of max. 1500 bar used. A number of high-pressure sensors are used to monitor such systems become known, which is shown in Fig. 1 to 3 as Prior Art are.

In den folgenden Fig. 4 bis 7 ist der Gedanke der Erfindung dargestellt.The concept of the invention is shown in the following FIGS. 4 to 7.

Fig. 1 stellt einen handelsüblichen piezoresistiven-Hochdruck-Sensor dar, bestehend aus den vier Hauptteilen: Gewindekörper 1, Messkopf 2, Membranteil 3, auf dem die Messbrücke 4 aufgebracht ist.Fig. 1 represents a commercially available piezoresistive high pressure sensor consists of the four main parts: threaded body 1, Measuring head 2, membrane part 3, on which the measuring bridge 4 is applied is.

In Fig. 2 ist der Gewindekörper 5, die Dichtpartie 6 und der Membranteil 7, auf dem das kapazitive Messteil 8 gelagert ist, einstückig ausgeführt.In Fig. 2 is the threaded body 5, the sealing section 6 and the membrane part 7, on which the capacitive measuring part 8 is mounted, in one piece executed.

In Fig. 3 ist das Membranteil 11 mit der Dichtpartie 10 einstückig ausgeführt und an der Dichtpartie 10 mit dem Gewindekörper 9 verschweisst. Die Messbrücke 12 besteht aus einem Silikonelement, das auf dem Membranteil 11 aufgeglast ist. Die Prior Art Drucksensoren sind z.Z. für max. Drücke von 1500 bar ausgelegt und im Einsatz.In Fig. 3, the membrane part 11 with the sealing section 10 is in one piece executed and welded to the sealing body 10 with the threaded body 9. The measuring bridge 12 consists of a silicone element that is blown onto the membrane part 11. The Prior Art pressure sensors are currently for max. Designed for pressures of 1500 bar and in use.

Die Erfindung befasst sich jedoch mit Hochdruck-Sensoren für Dauerbetrieb mit Spitzenwerten über 2000 bar, wo wesentliche härtere Anforderungen an Dichtpartie-Zuleitung und Membranteil gestellt werden. Alle drei Konstruktionen der Prior Art konnten solchen Anforderungen nicht genügen. Die Erfindungsgedanken sind in den Fig. 4 bis 7 als Beispiel dargestellt.

Fig. 4
zeigt schematisch den erfindungsgemässen Druckgeber im Schnitt,
Fig. 5
zeigt den Messkopf vor dem Innenschweissvorgang,
Fig. 6
zeigt denselben Messkopf nach dem Innenschweissvorgang und vor dem Aussenschweissvorgang,
Fig. 7
zeigt die fertige Verbindung zwischen Messkopf und Gewindeteil.
However, the invention is concerned with high-pressure sensors for continuous operation with peak values above 2000 bar, where there are much tougher requirements for the sealing section supply line and the membrane part. All three Prior Art constructions could not meet such requirements. The inventive concept is shown in FIGS. 4 to 7 as an example.
Fig. 4
schematically shows the pressure transmitter according to the invention in section,
Fig. 5
shows the measuring head before the internal welding process,
Fig. 6
shows the same measuring head after the internal welding process and before the external welding process,
Fig. 7
shows the finished connection between the measuring head and the threaded part.

Der Hauptgedanke der Erfindung bezieht sich auf die Gesamtbetrachtung des hydraulischen und mechanischen Teils, um eine dauerbetriebssichere Lösung, geeignet für Überwachungszwecke, zu finden.The main idea of the invention relates to the overall view of the hydraulic and mechanical part to make it permanently reliable Find a solution suitable for monitoring purposes.

Druckspitzen in der Grössenordnung von 3500 bar müssen als Prüfwerte bei der Abnahmeprüfung der Sensoren vorgesehen werden, um Dauerbetriebswerte von 2500 bar für zwei Service-Jahre zu garantieren. Solche Prüfwerte liegen jedoch an der Elastizitätsgrenze von rostfreien Hochleistungsstählen, die noch schweissbar sind. Die Gesamtheit der Probleme:

  • Membranpartie
  • Schweisspartie
  • Zuleitungspartie
  • Dichtpartie
    • sind alle auf die Materialgrenzen zu beziehen und sorgfältig aufeinander abzustimmen. Pressure peaks in the order of 3500 bar must be provided as test values during the acceptance test of the sensors in order to guarantee continuous operating values of 2500 bar for two service years. However, such test values lie on the elastic limit of high-performance stainless steels, which can still be welded. The totality of the problems:
  • Membrane section
  • Welding section
  • Supply line
  • Sealing section
    • are all related to the material limits and carefully coordinated.

    In Fig. 4 sind die Ziele der Erfindung schematisch dargestellt. Der Drucksensor besteht aus den 6 Hauptteilen: Gewindekörper 16 Messkopf 14 Membranpartie 21 Messbrücke 22 Dichtpartie 20 Schweisspartie 15 die alle bezüglich mechanisch zulässigen Materialspannungen aufeinander abgestimmt sind.4 the objectives of the invention are shown schematically. The pressure sensor consists of the 6 main parts: Threaded body 16 Measuring head 14 Membrane section 21 Measuring bridge 22 Sealing section 20th Welding section 15 all of which are coordinated with one another with regard to mechanically permissible material tensions.

    Von überragender Bedeutung im Gesamtsystem ist die Gestaltung des Messkopfes 14. Um befriedigende Signale der Messbrücke 22 zu gewährleisten, ist die Membranpartie 21 durch die Parameter ⊘ D1, ⊘ D3 und Dicke t bestimmt.The design of the measuring head 14 is of paramount importance in the overall system. In order to ensure satisfactory signals from the measuring bridge 22, the membrane section 21 is determined by the parameters ⊘ D 1 , ⊘ D 3 and thickness t.

    Um die hochgefährdete Schweisspartie 15 im zulässigen Materialfestigkeitsbereich zu halten, ist der Druckkopf 23 mit dem Ø D1 grösser als der Druckhals 24 mit Ø D2. Damit wird erreicht, dass für

    • das optimale Messsignal ⊘ D1 wirkt
    • die minimale Materialspannung Ø D2 wirkt
    und zwar beide im Quadrat der Differenz Ø D1- ⊘ D2.In order to keep the highly endangered welding section 15 within the permissible material strength range, the print head 23 with the Ø D 1 is larger than the print neck 24 with Ø D 2 . This ensures that for
    • the optimal measurement signal ⊘ D 1 is effective
    • the minimum material tension Ø D 2 is effective
    both squared of the difference Ø D 1 - ⊘ D 2 .

    Von grosser Bedeutung sind auch minimale Durchmesser d der Zuleitung 19 und der Dichtpartie 20, um minimale Materialspannungen zu erreichen.Minimum diameters d of the feed line are also of great importance 19 and the sealing section 20 in order to minimize material stresses to reach.

    Von Bedeutung ist auch die Herstellungsmöglichkeit eines ballonartigen Druckraumes, bestehend aus dem Druckkopfteil 23 und dem Druckhalsteil 24. Die Durchmesser derselben, deren Tiefe T und der Öffnungswinkel α sind wiederum so aufeinander abgestimmt, dass sie mit modernen Bearbeitungsmethoden wirtschaftlich herstellbar sind. Dazu kommen Zerspanungs- oder Elektroerosionsmethoden oder beide kombiniert in Frage.Also important is the possibility of manufacturing a balloon-like one Print room, consisting of the print head part 23 and the Druckhalteil 24. The diameter of the same, their depth T and the Opening angles α are in turn coordinated so that they can be produced economically using modern machining methods are. In addition there are machining or electro erosion methods or both combined in question.

    Der weitere Teil der Erfindung richtet sich auf die Gestaltung der Schweisspartie 15, deren Ausführung massgebend ist für sicheren Dauerbetrieb des Drucksensors. Lange Versuchsreihen haben gezeigt, dass Schweissspalte von innen, also von der Druckseite her, unter allen Umständen verhindert werden müssen.The further part of the invention is directed to the design of the Welding section 15, the execution of which is decisive for safe Continuous operation of the pressure sensor. Long series of tests have shown that welding gaps from the inside, i.e. from the pressure side, below must be prevented in all circumstances.

    Fig. 5 zeigt den Aufschweissvorgang mittels Innenschweissung im Moment des Schweissbeginns. Dazu ist der Gewindekörper 16 mit einem Schweisskonus 30 versehen, auf dem der Messkopf 14 mit der Halskante 31 aufsitzt. Die Dimensionen sind nach bekannten Vorschriften der elektrischen Stumpfschweisstechnik ausgebildet, wobei der Messkopf 14 von der Elektrode 32 gehaltert und elektrisch verbunden ist.Fig. 5 shows the welding process by means of internal welding in Sweat start moment. For this purpose, the threaded body 16 with a Welding cone 30 on which the measuring head 14 with the Neck edge 31 sits on. The dimensions are according to known regulations of electrical butt welding technology, where the measuring head 14 held by the electrode 32 and electrically connected is.

    Während des Schweissvorgangs beginnt die Verschmelzung entlang der Schweisskonusfläche 30, wobei Druckhalsteil 24 und Schweisskonus 30 ineinanderfliessen, wobei der Schweissweg S verbraucht wird.During the welding process, the fusion begins along the Welding cone surface 30, with pressure neck part 24 and welding cone 30 flow into one another, the welding path S being used up.

    Fig. 6 zeigt den Zustand nach der Innenschweissung, wobei der Schweissweg S durch die Pressschweissung zum Aussen-Schweissspalt 36 reduziert wurde. Die Schweisszone 34 weist einen Übergangsradius 35 auf, der frei von Innenspalten ist. Damit finden die Druckimpulse von Innen keine Angriffsflächen, die infolge Kerbwirkung zu Wanderrissen führen können.Fig. 6 shows the state after the internal welding, the Welding path S through the pressure welding to the external welding gap 36 was reduced. The welding zone 34 has a transition radius 35, which is free of internal gaps. So that the pressure impulses find no attack surfaces from the inside due to the notch effect can lead to tears.

    Der verbliebene Aussen-Schweissspalt 36 wird in einer weiteren Operation mit einer Laser-, Gas- oder Elektronen-Strahlschweissung geschlossen.The remaining outer welding gap 36 is in another Operation with laser, gas or electron beam welding closed.

    Dieser Endzustand ist in Fig. 7 dargestellt, nach Durchführung der Aussenschweissung, welche die Aussen-Schweisszone 37 ausbildet, die auf die Innen-Schweisszone 34 übergreifen kann.This final state is shown in FIG. 7 after the outer welding has been carried out, which forms the outer welding zone 37, which can overlap the inner welding zone 34.

    Mit der erfindungsgemässen Innen- und Aussenschweissung wird von innen die Wanderrissgefahr und von aussen die mechanische Festigkeit der hochbelasteten Verbindung des Messkopfes 14 mit dem Gewindekörper 16 erreicht.With the internal and external welding according to the invention, risk of tearing inside and mechanical strength from the outside the highly loaded connection of the measuring head 14 to the threaded body 16 reached.

    Die erfindungsgemässe Gestaltung des ballonartigen Druckmessraumes mit Druckkopfteil 23 und Druckhalsteil 24, mit der kombinierten Innenschweissung zur Verhinderung von Wanderrissen von innen, und der Aussen-Schweissung, zur Gewährleistung der mechanischen Festigkeit der Verbindung Messkopf 14 mit dem Gewindekörper 16 sowie dem kleinstmöglichen Durchmesser d der Zuleitung 19, ist die Grundlage für einen Hochdruck-Sensor für Dauerbetrieb mit Spitzendrücken bis 2500 bar geschaffen. Die Gestaltung der auf der Membranpartie 21 aufgebrachten Messbrücke 22 kann auf der Basis verschiedener bekannter Technologien ausgeführt werden. The design of the balloon-like pressure measuring space according to the invention with print head part 23 and print neck part 24, with the combined Internal welding to prevent tearing from the inside, and the external welding, to ensure the mechanical strength the connection of the measuring head 14 with the threaded body 16 and the smallest possible diameter d of the feed line 19 is Basis for a high pressure sensor for continuous operation with peak pressures created up to 2500 bar. The design of the membrane section 21 applied measuring bridge 22 can be based on various known technologies.

    Referenzencredentials

  • Fig.
    1
    Gewindekörper
    2
    Messkopf
    3
    Membranteil
    4
    Messbrücke
    Fig.
    1
    Threaded body
    2nd
    Measuring head
    3rd
    Membrane part
    4th
    Measuring bridge
  • Fig. 2
    5
    Gewindekörper
    6
    Dichtpartie
    7
    Membranteil
    8
    Messteil
    Fig. 2
    5
    Threaded body
    6
    Sealing section
    7
    Membrane part
    8th
    Measuring part
  • Fig. 3
    9
    Gewindekörper
    10
    Dichtpartie
    11
    Membranteil
    12
    Messbrücke
    Fig. 3
    9
    Threaded body
    10th
    Sealing section
    11
    Membrane part
    12th
    Measuring bridge
  • Fig. 4
    14
    Messkopf
    15
    Schweisspartie
    16
    Gewindekörper
    17
    Schlüsselfläche
    18
    Gewinde
    19
    Zuleitung
    20
    Dichtpartie
    21
    Membranpartie
    22
    Messbrücke
    23
    Druckkopfteil
    ⊘ D1, ⊘ D3, t
    Membranparameter
    24
    Druckhalsteil
    ⊘d
    Zuleitungs-Durchmesser
    α
    Öffnungswinkel des Ballons
    Fig. 4
    14
    Measuring head
    15
    Welding section
    16
    Threaded body
    17th
    Key surface
    18th
    thread
    19th
    Supply
    20th
    Sealing section
    21
    Membrane section
    22
    Measuring bridge
    23
    Printhead part
    ⊘ D 1 , ⊘ D 3 , t
    Membrane parameters
    24th
    Pressure neck part
    ⊘d
    Lead diameter
    α
    Opening angle of the balloon
  • Fig. 5
    30
    Schweisskonus
    31
    Halskante
    32
    Elektrode
    S
    Schweissweg
    Fig. 5
    30th
    Welding cone
    31
    Neck edge
    32
    electrode
    S
    Welding path
  • Fig. 6
    34
    Innen-Schweisszone
    35
    Übergangsradius
    36
    Aussen-Schweissspalt
    Fig. 6
    34
    Inside welding zone
    35
    Transition radius
    36
    Outside welding gap
  • Fig. 7
    37
    Aussen-Schweisszone
    Fig. 7
    37
    Outside welding zone

    • Claims (9)

    Hochdruck-Sensor, insbesondere zur Messung von pulsierenden Drücken hydraulischer Systeme, vorzugsweise im Bereich von über 2000 bar Spitzenwerten, dadurch gekennzeichnet, dass der Messdruckraum ballonartig gestaltet ist und in einen Druckkopfteil (23) mit grösserem Durchmesser (⊘ D1) und einem Druckhalsteil (24) mit kleinerem Durchmesser (⊘ D2) aufgeteilt ist und mittels Schweissung (15) mit dem Gewindekörper (16) verbunden ist.High-pressure sensor, in particular for measuring pulsating pressures of hydraulic systems, preferably in the range of more than 2000 bar peak values, characterized in that the measuring pressure space is designed like a balloon and in a printhead part (23) with a larger diameter (⊘ D 1 ) and a pressure neck part ( 24) with a smaller diameter (⊘ D 2 ) and is connected to the threaded body (16) by means of welding (15). Hochdruck-Sensor nach Anspruch 1, dadurch gekennzeichnet, dass die Verbindung des Messkopfes (14) mit dem Gewindekörper (16) derart gestaltet ist, dass sie von der Druckseite her frei von Schweissspalten ist, welche infolge Kerbwirkung zu Wanderrissen führen.High-pressure sensor according to claim 1, characterized in that the connection of the measuring head (14) with the threaded body (16) in this way is designed so that it is free from the pressure side There are sweat gaps, which tears as a result of the notch effect to lead. Hochdruck-Sensor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die mechanische Strukturverbindung des Messkopfes (14) mit dem Gewindekörper (16) mit einer Aussenschweissung (37) durchgeführt ist, die eine Elektronenstrahl-, Schutzgas- oder Laserschweissung sein kann.High-pressure sensor according to claim 1 or 2, characterized in that that the mechanical structural connection of the measuring head (14) performed with the threaded body (16) with an external weld (37) which is an electron beam, shielding gas or laser welding can be. Hochdruck-Sensor nach einem der Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die Verbindung zwischen Messkopf (14) und Gewindekörper (16) mittels Doppelschweissung in zwei Stufen sichergestellt ist, wobei zuerst mittels Elektrostauchschweissung die Innenschweissung, mittels Elektronenstrahl-, Schutzgas- oder Laserschweissung anschliessend die Aussenschweissung erstellt wird.High-pressure sensor according to one of claims 1 to 3, characterized in that the connection between the measuring head (14) and threaded body (16) ensured by means of double welding in two stages is, the first by means of electro upsetting welding Internal welding, using electron beam, inert gas or laser welding the external welding is then created. Hochdruck-Sensor nach Anspruch 4, dadurch gekennzeichnet, dass die Innenschweissung über einen Schweisskonus (30) erfolgt, der am Gewindekörper (16) angedreht ist, und über die Halskante (31) so durchgeführt wird, dass durch Schweissstrom und Presskraft P auf die Elektrode (32) ein Schweissweg (S) zurückgelegt wird, der Flüssigmaterial so verdrängt, dass ein spaltfeier Übergangsradius (35) entsteht. High-pressure sensor according to claim 4, characterized in that the internal welding takes place via a welding cone (30), which on Threaded body (16) is turned, and so over the neck edge (31) that is carried out by welding current and pressing force P. the electrode (32) covers a welding path (S) which Liquid material displaced so that a gap-free transition radius (35) arises. Hochdruck-Sensor nach Ansprüchen 4 oder 5, dadurch gekennzeichnet, dass die Aussenschweisszone (37) und die Innenschweisszone (34) teilweise überlappen, sodass im ganzen Verbindungsteil zwischen Messkopf (14) und Gewindekörper (16) eine verbindende Zone aus Schweissmaterial besteht.High-pressure sensor according to claims 4 or 5, characterized in that the outer welding zone (37) and the inner welding zone (34) partially overlap so that the entire connecting part between Measuring head (14) and threaded body (16) a connecting zone consists of welding material. Hochdruck-Sensor nach Anspruch 1, dadurch gekennzeichnet, dass Messkopf (14) und Gewindekörper (16) mit nur einer Schweissung verbunden sind.High-pressure sensor according to claim 1, characterized in that Measuring head (14) and threaded body (16) with only one weld are connected. Hochdruck-Sensor nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Gewindekörper (16) mit einer kleinstmöglichen Durchgangsbohrung vom Durchmesser (⊘ d) ausgeführt ist.High-pressure sensor according to one of claims 1 to 7, characterized in that the threaded body (16) with the smallest possible Through hole of diameter (⊘ d) is executed. Hochdruck-Sensor nach Ansprüchen 1 bis 8, dadurch gekennzeichnet, dass die Dichtpartie (20) einstückig mit dem Gewindekörper (16) ausgeführt ist.High-pressure sensor according to claims 1 to 8, characterized in that the sealing section (20) in one piece with the threaded body (16) is executed.
    EP99810565A 1998-07-14 1999-07-01 High-pressure sensor Expired - Lifetime EP0994250B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    CH01500/98A CH693490A5 (en) 1998-07-14 1998-07-14 High pressure sensor.
    CH150098 1998-07-14

    Publications (3)

    Publication Number Publication Date
    EP0994250A2 true EP0994250A2 (en) 2000-04-19
    EP0994250A3 EP0994250A3 (en) 2000-08-09
    EP0994250B1 EP0994250B1 (en) 2003-04-23

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    ID=4211909

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    Application Number Title Priority Date Filing Date
    EP99810565A Expired - Lifetime EP0994250B1 (en) 1998-07-14 1999-07-01 High-pressure sensor

    Country Status (5)

    Country Link
    US (1) US6092426A (en)
    EP (1) EP0994250B1 (en)
    AT (1) ATE238536T1 (en)
    CH (1) CH693490A5 (en)
    DE (1) DE59905161D1 (en)

    Cited By (4)

    * Cited by examiner, † Cited by third party
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    WO2011072911A1 (en) * 2009-12-15 2011-06-23 Robert Bosch Gmbh Method for producing a pressure sensor assembly and pressure sensor assembly
    US8763465B2 (en) 2009-12-15 2014-07-01 Robert Bosch Gmbh Method for producing a pressure sensor assembly and pressure sensor assembly
    ITBO20100309A1 (en) * 2010-05-17 2011-11-18 Magneti Marelli Spa FUEL PUMP FOR A DIRECT INJECTION SYSTEM
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    EP2918820A1 (en) * 2014-03-14 2015-09-16 Robert Bosch Gmbh Fuel injector, in particular a common-rail injector

    Also Published As

    Publication number Publication date
    EP0994250A3 (en) 2000-08-09
    EP0994250B1 (en) 2003-04-23
    CH693490A5 (en) 2003-08-29
    US6092426A (en) 2000-07-25
    ATE238536T1 (en) 2003-05-15
    DE59905161D1 (en) 2003-05-28

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