EP1746277B1 - Dispositif et système pour tester un injecteur piezoélectrique - Google Patents

Dispositif et système pour tester un injecteur piezoélectrique Download PDF

Info

Publication number
EP1746277B1
EP1746277B1 EP06117127.8A EP06117127A EP1746277B1 EP 1746277 B1 EP1746277 B1 EP 1746277B1 EP 06117127 A EP06117127 A EP 06117127A EP 1746277 B1 EP1746277 B1 EP 1746277B1
Authority
EP
European Patent Office
Prior art keywords
capacitor
emitting diode
injector
parallel
light
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.)
Active
Application number
EP06117127.8A
Other languages
German (de)
English (en)
Other versions
EP1746277A3 (fr
EP1746277A2 (fr
Inventor
Kai Sutter
Gerhard Lemke
Olaf Gloss
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 EP1746277A2 publication Critical patent/EP1746277A2/fr
Publication of EP1746277A3 publication Critical patent/EP1746277A3/fr
Application granted granted Critical
Publication of EP1746277B1 publication Critical patent/EP1746277B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/2086—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements

Definitions

  • the invention relates to an apparatus and a method for testing a piezo injector of a common rail system.
  • the object of the invention is to provide an apparatus and a method for testing a piezo injector of a common rail system, by which the error detection is improved.
  • This device comprises an electrical substitute load for the piezo injector.
  • the substitute load is used in the test device according to the invention to simulate the piezo injector to be tested. This makes it possible to clearly determine whether the tested Piezo injector is defective, or whether the error is for example in the associated cable harness or in the control unit.
  • the electrical equivalent load comprises a capacitor whose capacity is adapted to the piezo injector to be tested.
  • a film capacitor is used in the test device according to the invention.
  • a current direction-dependent signal device is connected.
  • the signaling device serves to indicate whether the replacement load is connected to the test device with correct polarity.
  • the device is characterized in that the signaling device comprises a light-emitting diode which is connected in parallel with the capacitor.
  • the LED preferably glows green when the equivalent load is connected to the test fixture with the correct polarity.
  • a further preferred embodiment of the device is characterized in that the signal device comprises a further light-emitting diode which is connected in anti-parallel to the capacitor.
  • the further light-emitting diode preferably shines red when the equivalent load is not connected to the test device with the correct polarity.
  • test device comprises an input terminal and an output terminal, between which the electrical equivalent load is connected.
  • the connections are used to connect connection cables to the test device.
  • test device comprises a pair of sockets for connecting connecting lines and a further pair of sockets for connecting an additional module.
  • the add-on module is used to allow testing of other piezo injectors than with the tester alone.
  • a further preferred embodiment of the device is characterized in that the additional module comprises a further capacitor which is switchable in parallel to the first capacitor.
  • the additional module is preferably by means of connector elements in a simple manner solvable, that is non-destructively separable, connectable to the test device.
  • a method for testing a piezo injector of a common rail system of an internal combustion engine with a test device described above is characterized by the following method steps: First, an electrical connector is detached from the piezoinjector and connected to the tester; subsequently or else before, an oscilloscope, in particular a two-channel oscilloscope, is connected to the test apparatus; Finally, the drive signal for the piezo injector is detected with the aid of the oscilloscope while the internal combustion engine is running. The detected drive waveform is compared with a reference drive waveform of an intact injector.
  • the Referenzan Tavernsignalverlauf is stored for example in a troubleshooting guide. If the detected drive waveform matches the reference drive waveform, then it can be assumed that both the control unit as well as belonging to the piezoinjector harness are in order. The error is then in the piezo injector. If the detected drive waveform does not match the reference drive waveform, then the fault is in the harness or in the controller.
  • a preferred embodiment of the method is characterized in that is controlled by means of the signal device integrated in the test device, whether the piezo injector is connected with correct polarity. If the pin assignment of the electrical connector plug of the piezoelectric injector, for example, due to a manufacturing error is not correct, then it may happen that the piezoelectric injector is not connected with correct polarity, which can lead to permanent damage to the piezoelectric injector.
  • the current-direction-dependent signal device according to the invention reliably detects whether the piezo injector is connected in the correct polarity.
  • FIG. 1 an electrical circuit diagram of a test device 1 according to the invention is shown.
  • the test apparatus 1 has an input terminal 4 and an output terminal 5.
  • the terminals 4 and 5 are formed by connection sockets, which are mounted externally accessible in a housing (not shown) of the test apparatus.
  • a film capacitor 8 is connected, whose capacity is, for example, 4.7 ⁇ F.
  • the capacitance of the film capacitor 8 corresponds to the capacitance of the piezoelectric injector to be tested.
  • a so-called erase diode 10 is connected in parallel with the film capacitor 8.
  • the erase diode 10 serves to eliminate voltage peaks occurring during operation of the test apparatus 1.
  • a light emitting diode 12 is connected in parallel with the film capacitor 8 and the erase diode 10.
  • the light emitting diode 12 is, as indicated by arrows 13, 14, green light from when it is flowed through in the arrow direction.
  • a protective resistor 16 and a protective diode 18 are connected in series.
  • the protective resistor 16 serves to limit the current flowing through.
  • the protection diode 18 serves to allow a current flow in one direction only.
  • test device 1 is used to test the electrical drive signal and to test the polar connection of piezoelectric injectors in common-rail systems.
  • the film capacitor 8 and the erase diode 10 form a surrogate load for a piezo injector to be tested.
  • the light emitting diode 12 serves as an indicator of the polarity.
  • the engine control unit associated with the engine of a motor vehicle recognizes Error. This fault is stored in the fault memory of the engine control unit and can be displayed via a diagnostic tester.
  • the device according to the invention is connected with correct polarity with connecting lines to a harness connector of the piezoelectric injector to be tested.
  • a two-channel oscilloscope will be added to the connection lines connected for voltage and current measurement. Then, with the engine running, the drive signal is displayed on the oscilloscope and compared with a reference signal image.
  • the reference signal image is stored in a troubleshooting guide.
  • the light-emitting diode 12, which is installed in parallel with the terminals 4, 5, serves as an indicator of whether the substitute load 8, 10 is connected with correct polarity.
  • the piezo injectors For a permanent function of the common rail system, the piezo injectors must be connected with correct polarity. For this reason, the plug-in connections of the piezoinjectors are mechanically coded and the pin assignment of the harness connectors for the manufacturing process is fixed.
  • the piezo injector works, but it can lead to permanent damage. Then the maximum stroke of the piezo injector is no longer reached during operation. This type of error is not detected by the self-monitoring of the engine control unit. Although such a permanently damaged piezo injector would be recognized by the engine control unit and replaced in service by a new injector. The new Injector would, however, due to the wrong pin assignment in turn permanently damaged.
  • 5 connected light emitting diode 12 can be checked in a simple manner, whether the respective lines are correctly connected in the harness connector. If the light emitting diode 12 does not flicker with the engine running to the rhythm of the drive signals, then you can see that there is a fault in the harness / harness connector.
  • connection sockets 4, 5 but preferably also two further connection sockets 21, 22 which are arranged at a defined distance 24 to each other.
  • the distance 24 is for example 24 mm.
  • the additional connection sockets 21, 22 serve to accommodate connection plugs of an additional module.
  • FIG. 3 Such an additional module 30 is shown in the form of an electrical circuit diagram.
  • the additional module 30 comprises two connection plugs 31, 32, which are connected to terminals 33, 34.
  • the connection plugs 31, 32 are arranged at the same distance 24 as the additional connection sockets (21, 22 in FIG. 2 ).
  • the additional module 30 can be easily connected to the test device 1 by means of the connection plugs 31, 32, by inserting the connection plugs 31, 32 into the additional connection sockets (21, 22 in FIG. 2 ) are inserted.
  • a film capacitor 38 is connected between the terminals 33 and 34.
  • the capacitance of the film capacitor 38 is chosen so that the total capacitance of the film capacitor (8 in FIG. 1 ) and the film capacitor 38 corresponds to the capacitance of a piezoelectric injector to be tested.
  • an erase diode 40 is connected parallel to the film capacitor 38.
  • a light-emitting diode 42 is connected in parallel with the film capacitor 24 and the erase diode 40.
  • the light emitting diode 42 outputs, as indicated by arrows 43, 44, green light when it is traversed by current.
  • a protective resistor 46 and a protective diode 48 are connected in series with the light-emitting diode 42.

Landscapes

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

Claims (5)

  1. Dispositif destiné à tester un injecteur piézoélectrique d'un système à rampe commune qui comprend une charge électrique équivalente destinée à l'injecteur piézoélectrique, dans lequel la charge électrique équivalente comporte un condensateur (8) dont la capacité est adaptée à l'injecteur piézoélectrique à tester, dans lequel un moyen de signalisation (12) dépendant de la direction du courant est connecté en parallèle avec le condensateur (8), caractérisé en ce que le moyen de signalisation comprend une diode électroluminescente (12) qui est connectée en parallèle avec le condensateur (8), dans lequel la diode électroluminescente (12) sert d'indicateur indiquant si la charge équivalente est connectée avec la polarité correcte.
  2. Dispositif selon la revendication 1, caractérisé en ce que le moyen de signalisation (12) comprend une autre diode électroluminescente qui est connectée en antiparallèle avec le condensateur.
  3. Dispositif selon l'une des revendications 1 et 2, caractérisé en ce qu'il est prévu une borne d'entrée (4) et une borne de sortie (5) entre lesquelles est connectée la charge électrique équivalente.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'il est prévu une paire de prises (4, 5) destinée à raccorder des lignes de connexion et une autre paire de prises (21, 22) destinée à raccorder un module supplémentaire (30).
  5. Dispositif selon la revendication 4, caractérisé en ce que le module supplémentaire (30) comprend un autre condensateur (38) qui peut être connecté en parallèle avec le premier condensateur (8).
EP06117127.8A 2005-07-21 2006-07-13 Dispositif et système pour tester un injecteur piezoélectrique Active EP1746277B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005034869A DE102005034869A1 (de) 2005-07-21 2005-07-21 Vorrichtung und Verfahren zum Prüfen eines Piezoinjektors

Publications (3)

Publication Number Publication Date
EP1746277A2 EP1746277A2 (fr) 2007-01-24
EP1746277A3 EP1746277A3 (fr) 2010-09-29
EP1746277B1 true EP1746277B1 (fr) 2019-04-10

Family

ID=37136956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06117127.8A Active EP1746277B1 (fr) 2005-07-21 2006-07-13 Dispositif et système pour tester un injecteur piezoélectrique

Country Status (2)

Country Link
EP (1) EP1746277B1 (fr)
DE (1) DE102005034869A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029493A1 (de) * 2010-05-31 2011-12-01 Robert Bosch Gmbh Vorrichtung zum Prüfen von Kraftstoffinjektoren sowie entsprechendes Verfahren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168238A (en) * 1991-08-19 1992-12-01 Coy Larance Fuel injector circuit tester with rotatable magnifying lens for viewing indicating LEDs
DE60034563D1 (de) * 2000-09-08 2007-06-06 Bosch Gmbh Robert Verfahren und Vorrichtung zum Simulieren des elektrischen Verhaltens eines piezoelektrischen Elements
US6761059B2 (en) * 2002-02-05 2004-07-13 International Engine Intellectual Property Company, Llc Diagnostic tool for electric-operated fuel injectors and their drivers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102005034869A1 (de) 2007-01-25
EP1746277A3 (fr) 2010-09-29
EP1746277A2 (fr) 2007-01-24

Similar Documents

Publication Publication Date Title
DE3782165T3 (de) Anlage zur bestimmung von anomalien und funktionsausfällen unterschiedlichster art von in motorfahrzeugen engebauten elektronischen überwachungsanlagen.
DE4320173C2 (de) Diagnoseverfahren für Kraftfahrzeuge zum Überprüfen elektronisch gesteuerter Systeme
EP2211147B1 (fr) Procédé de contrôle du fonctionnement d'une circuit électrique
DE102016109741B4 (de) Testpunktkarten-Einrichtung für einen Prüftisch
DD296763A5 (de) Vorrichtung und verfahren zum testen von an einer gleichstromquelle angeschlossenen elektischen verbrauchern eines kraftfahrzeuges
DE102007033581A1 (de) Testgerät für einen aktiven Raddrehzahlsensor
EP2181029B1 (fr) Dispositif de contrôle destiné au contrôle d'une connexion d'un composant de connexion
DE19507959C1 (de) Vorrichtung zur Strommessung an einer Hauptstromleitung eines Fahrzeug-Bordnetzes
DE102010048348A1 (de) Verfahren zur Fehlerlokalisation in einem Hochvoltbordnetz eines Fahrzeuges
DE2229372C3 (de) Vorrichtung zum Prüfen einer elektronisch gesteuerten Kraftstoffeinspritzung und/oder einer elektronischen Zündanlage bei Brennkraftmaschinen
DE102020003878A1 (de) Hochvolt-Bordnetz für ein zumindest teilweise elektrisch betriebenes Kraftfahrzeug, sowie Verfahren
DE102011117248A1 (de) Verfahren und Vorrichtung zur Überwachung von Komponenten eines Fahrzeugs
DE102013206432A1 (de) Verfahren und Anordnung zur Treiberdiagnose von Schützen, Batterie und Kraftfahrzeug mit einer solchen Batterie
EP1746277B1 (fr) Dispositif et système pour tester un injecteur piezoélectrique
EP0609261B1 (fr) Systeme de controle d'un systeme de commande electrique
EP2191539A2 (fr) Module de raccordement, module collecteur de courant et ensemble doté de ces modules pour un collecteur en amont dans une installation photovoltaïque
DE102021003652A1 (de) Elektrische Verbindungsanordnung und Verfahren zum Überwachen eines Betriebs einer elektrischen Verbindungsanordnung
EP3899558B1 (fr) Procédé et dispositif de contrôle
EP2404048B1 (fr) Procédé et dispositif pour identifier une coupure au niveau d'une ligne d'alimentation électrique
EP2577038A1 (fr) Dispositif de contrôle d'injecteurs de carburant et procédé correspondant
DE10141602A1 (de) Elektrische Geräteeinheit und Verfahren zur Überprüfung von Steckverbindungen
DE102007000854B4 (de) Lastantriebsvorrichtung
DE102012020438A1 (de) Verfahren zur Prüfung einer elektrischen Verbindung zwischen zwei Energiespeichereinheiten einer Batterieanordnung und Batterieanordnung
DE102017005589A1 (de) Interlocksystem zum Überwachen zumindest einer Hochvolt-Komponente eines Kraftfahrzeugs, Hochvolt-Komponente, Hochvolt-System sowie Verfahren
DE102011108229A1 (de) Vorrichtung und Verfahren zur Überprüfung von Kfz-Steckdosen, insbesondere bei der Montage von Kraftfahrzeugen

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: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17P Request for examination filed

Effective date: 20110329

AKX Designation fees paid

Designated state(s): DE FR IT

17Q First examination report despatched

Effective date: 20161128

RIC1 Information provided on ipc code assigned before grant

Ipc: G01R 29/22 20060101ALI20181026BHEP

Ipc: F02M 65/00 20060101ALI20181026BHEP

Ipc: G01R 31/28 20060101ALI20181026BHEP

Ipc: F02D 41/22 20060101AFI20181026BHEP

Ipc: F02D 41/20 20060101ALI20181026BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20190107

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502006016222

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006016222

Country of ref document: DE

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

Effective date: 20200113

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

Ref country code: FR

Payment date: 20200727

Year of fee payment: 15

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

Ref country code: IT

Payment date: 20200731

Year of fee payment: 15

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

Ref country code: FR

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

Effective date: 20210731

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: 20210713

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

Ref country code: DE

Payment date: 20240919

Year of fee payment: 19