EP1969226A1 - Test apparatus for a cam-driven fuel injection system, in particular a pump/nozzle or pump/line/nozzle injection system - Google Patents

Test apparatus for a cam-driven fuel injection system, in particular a pump/nozzle or pump/line/nozzle injection system

Info

Publication number
EP1969226A1
EP1969226A1 EP06819219A EP06819219A EP1969226A1 EP 1969226 A1 EP1969226 A1 EP 1969226A1 EP 06819219 A EP06819219 A EP 06819219A EP 06819219 A EP06819219 A EP 06819219A EP 1969226 A1 EP1969226 A1 EP 1969226A1
Authority
EP
European Patent Office
Prior art keywords
injection system
fuel injection
lever
pump
positions
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
EP06819219A
Other languages
German (de)
French (fr)
Other versions
EP1969226B1 (en
Inventor
Reinhard Hoss
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 EP1969226A1 publication Critical patent/EP1969226A1/en
Application granted granted Critical
Publication of EP1969226B1 publication Critical patent/EP1969226B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • Test device for a cam-driven fuel injection system in particular a pump-nozzle or pump-line-nozzle injection system
  • the invention relates to a test device for a cam-driven fuel injection system, in particular a pump-nozzle or pump-line-nozzle injection system, according to the preamble of claim 1.
  • the injection pressure and the injection quantity depend inter alia on the shape of the cam and its stroke.
  • Different fuel injection systems have different strokes and cam shapes.
  • identical fuel injection systems are operated with identical stroke in different types of engines with different cams.
  • test devices are known from the market.
  • a cam-driven fuel injection system is installed. Via a camshaft and a lever, the piston of the fuel injection system is acted upon and thereby simulated an operation.
  • the same cam is used for different types of fuel injection systems, and all fuel injection systems are operated at the same stroke. This is, in order to avoid damage, relatively small.
  • a test device in which the cams of the camshaft are interchangeable. This can be assigned to each fuel injection system, a specific cam.
  • the present invention has the object to provide a test device of the type mentioned, with the different fuel injection systems can be cost-effectively and technically feasible tested.
  • test device comprises an exchangeable intermediate element on which the different attachment positions for the actuation element are present.
  • Scope of the test device extended again, and the manufacturing and operating costs of the tester are lowered because the lever can be standardized and instead the intermediate plate is provided with the corresponding mounting positions.
  • the intermediate plate is provided with the corresponding mounting positions.
  • a construction-specific intermediate plate with different attachment positions can be provided.
  • the intermediate element is considerably less expensive to produce than the lever.
  • a particularly preferred embodiment is characterized in that the fastening positions are formed by threaded holes into which the actuating element is screwed. This realization is particularly inexpensive and easy to use.
  • test device comprises a fastening device with a plurality of mounting positions for the fuel injection system, each mounting position corresponds to a certain distance of a longitudinal axis of the piston of the fuel injection system from the pivot axis of the lever , In this way, lateral forces introduced by the actuating element into the pistons of a fuel injection system are reduced and the real operating conditions of the fuel injection system to be tested are well simulated.
  • a fastening device with a plurality of mounting positions for the fuel injection system, each mounting position corresponds to a certain distance of a longitudinal axis of the piston of the fuel injection system from the pivot axis of the lever , In this way, lateral forces introduced by the actuating element into the pistons of a fuel injection system are reduced and the real operating conditions of the fuel injection system to be tested are well simulated.
  • several discrete mounting positions can be provided, or it can be used a device which is linearly displaceable and thus allows a plurality of intermediate positions.
  • adapter elements may be provided with which different fuel
  • the mounting positions are individualized so that each type of motor vehicle system is assigned a specific attachment position unmistakable. This ensures that the correct test piece is assigned to the respective test object. This in turn simplifies the handling of the test device according to the invention and reduces the frequency of incorrect test results.
  • test device comprises a sensor which detects at least indirectly a reaction force occurring upon actuation of the fuel injection system. This makes it possible to detect additional errors or deficiencies, for example in the tightness of the tested fuel injection system, which can not be detected by measuring the injection quantity alone or by a visual inspection.
  • the senor can be arranged on the lever, so that it detects the force acting there. Even more preferred, however, is when the mounting device is pivotally supported and supported by a pendulum support and when the sensor detects a force acting on the pendulum support or on a bearing block of the pendulum support force.
  • the last-mentioned embodiment minimizes lateral force influences on the measurement result and thus improves the validity of the reaction force measurement.
  • camshaft has a plurality of juxtaposed different cams and the lever together with the fastening device for the fuel injection device in the axial direction of the camshaft in different
  • Figure 1 is a schematic and partially sectional view of a test device for a cam-driven fuel injection system
  • FIG. 2 is a perspective, also partly cut and more detailed
  • a testing device carries in FIGS. 1 and 2 the reference numeral 10 as a whole. It is used to test a cam-driven fuel injection system, in the present example a pump-nozzle injection system 12, which however is shown only in FIG. First, its structure and function are explained.
  • the pump-nozzle injection system 12 comprises a housing 14 with a nozzle tip 16 which projects into an injection chamber 18 of the test apparatus 10.
  • a nozzle needle 20 is slidably received, which is acted upon by a spring 22 in a closed position.
  • a pump of the pump-nozzle injection system 12 is designated by 24 and comprises a piston 26 which delimits a delivery space 28. This is connected to a pressure chamber 30, which acts from one formed on the nozzle needle 20 and in the opening direction Pressure surface 32 is limited.
  • the delivery chamber 28 is further connected via a magnetic control valve 34 and a feed pump 36 with a fluid container 38, in which a test fluid is stored in the present case.
  • test fluid is sucked out of the fluid container 38 into the delivery chamber 28 when the control valve 34 is open.
  • the control valve 34 is closed, the test fluid enclosed in the delivery chamber 28 is compressed during a delivery stroke of the piston 26, which leads to a corresponding pressure increase in the pressure chamber 30. If the hydraulic force acting on the pressure surface 32 exceeds the force of the spring 22, the nozzle needle 20 opens and test fluid is injected from the nozzle tip 16 into the injection chamber 18, where it is collected and passed on.
  • test apparatus 10 For testing the pump-nozzle injection system 12, the test apparatus 10 has two essential sub-apparatuses: an actuator 40 and a fixture 42. First to the latter:
  • the fastening device 42 comprises a guide plate 44 with a plurality of mutually parallel guide grooves 46, of which, for reasons of clarity, only one carries a reference numeral.
  • guide grooves 46 By means of these guide grooves 46, different attachment positions are defined for an adapter element designed as an adapter plate 48.
  • the housing 14 of the pump-nozzle injection system 12 is fixed in a manner not shown here.
  • the guide plate 44 is articulated in 50 to a stationary base 52 of the test apparatus 10. In order to prevent tilting of the guide plate 44 during operation, this is supported at its end remote from the joint 50 via a pendulum support 54 on a bearing block 56, which is also connected to the stationary base 52. On the bearing block 56 designed as a strain gauge 58 sensor is arranged, which detects a force acting on the bearing block 56 via the pendulum support 54 transverse force.
  • the actuator 40 is constructed as follows.
  • a drag lever 60 is pivotally mounted in 62 again on the stationary base 52.
  • the pivot joint 62 is laterally spaced from a longitudinal axis 64 of the piston 26 of the pump-nozzle injection system 12th Arm 66 of the finger lever 60 extends toward the piston 26.
  • an intermediate element forming an intermediate plate 68 is fixed, in which a plurality of threaded holes 70 are present (for illustrative reasons, only one is provided with a reference numeral).
  • the threaded holes 70 are spaced from the defined by the hinge 62 pivot axis of the finger lever 60 different.
  • the ball head of the actuator 22 cooperates with a complementary recess (without reference numeral) in the piston 26 of the pump-nozzle injection system 12 together.
  • a roller holder 74 with a roller 76 is arranged on this. This in turn cooperates with a cam 78 of a camshaft 80. This is driven by a drive motor, not shown here, for example an electric motor.
  • a second arm 82 of the drag lever 60 is acted upon by a compression spring 84 which is clamped between the arm 82 and in turn the stationary base 52. In this way, the roller 76 is constantly pressed against the cam 78.
  • the test apparatus 10 operates as follows: Upon rotation of the camshaft 80, the drag lever 60 is pivoted about its pivot axis 62. Due to the lever arm between the actuating element 72 and the pivot axis defined by the joint 62 (this lever arm is designated by 86 in FIG. 1), a specific stroke results for each threaded bore 70. This is at the threaded hole 70, in which the actuator 72 is screwed in Figure 1, the lowest.
  • the reaction force which is introduced by the pressure build-up in the delivery chamber 28 via the housing 14 and the adapter plate 48 in the guide plate 44 is transmitted via the pendulum support 54 in the bearing block 56 and there from the strain gauge 58 recorded.
  • the adapter plate 48 is simply mounted in other guide grooves 46 on the guide plate 44 and the actuator 72 is screwed into another of the threaded holes 70. If another pump-injector system 12 is to be tested, another adapter plate 48 is used. Possible, but not shown, is that the guide grooves are individualized, allowing each type of fuel injection system a specific mounting position and thus also a specific hub is unmistakably assigned. In an exemplary embodiment, also not shown, beyond the fastening device can be moved together with the actuator (without camshaft) in the longitudinal direction of the camshaft. The corresponding camshaft then has a plurality of different and juxtaposed cams, so that depending on the position of the actuator, the roller cooperates with another cam.

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

A test rig (10) is employed to test the correct operation of a camshaft-driven automotive fuel injection system. The rig consists of a camshaft (80) that engages via a lever (60) with a piston (26) forming part of the fuel injection system (12). The lever has a number of attachment points (70) for a plunger (72) in contact with the piston (26). The attachment points are at varying distances from the lever (60) swivel axis (62).

Description

Titel Prüfvorrichtung für ein nockengetriebenes Kraftstoff-Einspritzsystem, insbesondere ein Pumpe- Düse- oder Pumpe-Leitung-Düse-EinspritzsystemTest device for a cam-driven fuel injection system, in particular a pump-nozzle or pump-line-nozzle injection system
Beschreibungdescription
Stand der TechnikState of the art
Die Erfindung betrifft eine Prüfvorrichtung für ein nockengetriebenes Kraftstoff-Einspritzsystem, insbesondere ein Pumpe-Düse- oder Pumpe-Leitung-Düse-Einspritzsystem, nach dem Oberbegriff des Anspruchs 1.The invention relates to a test device for a cam-driven fuel injection system, in particular a pump-nozzle or pump-line-nozzle injection system, according to the preamble of claim 1.
Bei modernen Dieselmotoren wird der Kraftstoff direkt von einem Kraftstoff-Einspritzsystem unter hohem Druck in den Brennraum eingespritzt. Dabei kommen verschiedene Typen vonIn modern diesel engines, the fuel is injected directly from a fuel injection system under high pressure into the combustion chamber. There are different types of
Kraftstoff-Einspritzsystemen zur Anwendung, beispielsweise Pumpe-Düse-Einspritzsysteme oder Pumpe-Leitung-Düse-Einspritzsysteme. Beide Kraftstoff-Einspritzsysteme werden am Motor selbst über eine Nockenwelle betätigt. Eine Nocke auf der Nockenwelle bewirkt über einen Hebel einen Hub eines Pumpenkolbens des Kraftstoff-Einspritzsystems. Dieser erzeugt an einer Düse des Kraftstoff-Einspritzsystems einen sehr hohen Druck, durch den eine Ventilnadel in eine geöffnete Stellung verdrängt und so Kraftstoff in einen Brennraum des Motors eingespritzt wird. Die Einspritzmenge wird über ein Magnetventil eingestellt, welches den Druckaufbau in dem Kraftstoff-Einspritzsystem steuert.Fuel injection systems for use, for example, pump-nozzle injection systems or pump-line-nozzle injection systems. Both fuel injection systems are actuated on the engine itself via a camshaft. A cam on the camshaft causes via a lever a stroke of a pump piston of the fuel injection system. This generates at a nozzle of the fuel injection system, a very high pressure, displaced by a valve needle in an open position and so fuel is injected into a combustion chamber of the engine. The injection quantity is adjusted via a solenoid valve which controls the pressure build-up in the fuel injection system.
Der Einspritzdruck und die Einspritzmenge sind unter anderem abhängig von der Form der Nocke und deren Hub. Unterschiedliche Kraftstoff-Einspritzsysteme weisen unterschiedliche Hübe und Nockenformen auf. Zum Teil werden auch identische Kraftstoff-Einspritzsysteme mit identischem Hub in unterschiedlichen Typen von Motoren mit unterschiedlichen Nocken betätigt. Zu Testzwecken und für die Qualitätskontrolle der oben beschriebenen nockengetriebenen Kraftstoff-Einspritzsysteme sind vom Markt her PrüfVorrichtungen bekannt. In eine solche PrüfVorrichtung wird ein nockengetriebenes Kraftstoff-Einspritzsystem eingebaut. Über eine Nockenwelle und einen Hebel wird der Kolben des Kraftstoff-Einspritzsystems beaufschlagt und hierdurch ein Betrieb simuliert. Bei der bekannten Prüfvorrichtung wird die gleiche Nocke für unterschiedliche Typen von Kraftstoff-Einspritzsystemen verwendet, und alle Kraftstoff- Einspritzsysteme werden mit dem gleichen Hub betrieben. Dieser ist, um Schäden zu vermeiden, relativ klein. Bekannt ist auch eine PrüfVorrichtung, bei der die Nocken der Nockenwelle austauschbar sind. Damit kann jedem Kraftstoff-Einspritzsystem ein spezifischer Nocken zugeordnet werden.The injection pressure and the injection quantity depend inter alia on the shape of the cam and its stroke. Different fuel injection systems have different strokes and cam shapes. In part, identical fuel injection systems are operated with identical stroke in different types of engines with different cams. For testing purposes and for quality control of the cam-driven fuel injection systems described above, test devices are known from the market. In such a test device, a cam-driven fuel injection system is installed. Via a camshaft and a lever, the piston of the fuel injection system is acted upon and thereby simulated an operation. In the known test apparatus, the same cam is used for different types of fuel injection systems, and all fuel injection systems are operated at the same stroke. This is, in order to avoid damage, relatively small. Also known is a test device in which the cams of the camshaft are interchangeable. This can be assigned to each fuel injection system, a specific cam.
Die vorliegende Erfindung hat die Aufgabe, eine Prüfvorrichtung der eingangs genannten Art zu schaffen, mit der unterschiedliche Kraftstoff-Einspritzsysteme kostengünstig und technisch sinnvoll geprüft werden können.The present invention has the object to provide a test device of the type mentioned, with the different fuel injection systems can be cost-effectively and technically feasible tested.
Offenbarung der ErfindungDisclosure of the invention
Diese Aufgabe wird durch eine PrüfVorrichtung mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in Unteransprüchen angegeben. Darüber hinaus finden sich wichtige Merkmale der Erfindung auch in der Beschreibung und der Zeichnung. Dabei sei an dieser Stelle darauf hingewiesen, dass diese Merkmale in ganz unterschiedlichen Kombinationen für die Erfindung wichtig sein können, ohne dass hierauf nochmals explizit hingewiesen wird.This object is achieved by a test device having the features of claim 1. Advantageous developments of the invention are specified in subclaims. In addition, important features of the invention are also found in the description and the drawings. It should be noted at this point that these features in very different combinations may be important for the invention, without being explicitly referred to again.
Vorteile der ErfindungAdvantages of the invention
Bei der erfindungsgemäßen PrüfVorrichtung können unterschiedliche Hübe am Kolben eines Kraftstoff-Einspritzsystems mit ein und derselben Nocke realisiert werden. Damit können die Kraftstoff-Einspritzsysteme nicht nur im unteren, sondern auch im oberen Druckbereich geprüft werden, was die Aussagekraft der durchgeführten Prüfung verbessert. Ein aufwändiges Wechseln der Nocke ist dabei nicht erforderlich, so dass die Betriebs- und Herstellkosten der erfindungsgemäßen PrüfVorrichtung niedrig sind. Ermöglicht wird dies dadurch, dass der Hebel so ausgestaltet ist, dass er mit unterschiedlichen Hebelarmen und somit mit unterschiedlichen Hüben betrieben werden kann. Die unterschiedlichen Hebelarme können durch diskrete Befestigungspositionen dargestellt werden oder beispielsweise durch eine Linearverschieblichkeit des Betätigungselements auf dem Hebel. Dabei ist der Hebel vorzugsweise als Schwenk- oder Kipphebel ausgestaltet.In the test device according to the invention different strokes on the piston of a fuel injection system can be realized with one and the same cam. Thus, the fuel injection systems can be tested not only in the lower, but also in the upper pressure range, which improves the validity of the test carried out. A complex change of the cam is not required, so that the operating and manufacturing costs of the test device according to the invention are low. This is made possible by the fact that the lever is designed so that it can be operated with different lever arms and thus with different strokes. The different lever arms can be represented by discrete mounting positions or, for example, by a linear displacement of the actuating element on the lever. The lever is preferably designed as a pan or rocker arm.
Eine vorteilhafte Weiterbildung der erfmdungsgemäßen Prüfvorrichtung zeichnet sich dadurch aus, dass der Hebel ein austauschbares Zwischenelement umfasst, an dem die unterschiedlichen Befestigungspositionen für das Betätigungselement vorhanden sind. Auf diese Weise wird derAn advantageous development of the test device according to the invention is characterized in that the lever comprises an exchangeable intermediate element on which the different attachment positions for the actuation element are present. In this way, the
Anwendungsbereich der Prüfvorrichtung nochmals erweitert, und die Herstell- und Betriebskosten der Prüfvorrichtung werden gesenkt, da der Hebel standardisiert sein kann und stattdessen die Zwischenplatte mit den entsprechenden Befestigungspositionen versehen ist. Beispielsweise kann für unterschiedliche Baureihen von Kraftstoff-Einspritzsystemen jeweils eine baureihenspezifische Zwischenplatte mit unterschiedlichen Befestigungspositionen vorgesehen sein. Das Zwischenelement ist erheblich preiswerter herstellbar als der Hebel.Scope of the test device extended again, and the manufacturing and operating costs of the tester are lowered because the lever can be standardized and instead the intermediate plate is provided with the corresponding mounting positions. For example, for each of a number of series of fuel injection systems, a construction-specific intermediate plate with different attachment positions can be provided. The intermediate element is considerably less expensive to produce than the lever.
Eine besonders bevorzugte Ausgestaltung zeichnet sich dadurch aus, dass die Befestigungspositionen durch Gewindebohrungen gebildet sind, in die das Betätigungselement eingeschraubt ist. Diese Realisierung ist besonders preisgünstig und einfach anwendbar.A particularly preferred embodiment is characterized in that the fastening positions are formed by threaded holes into which the actuating element is screwed. This realization is particularly inexpensive and easy to use.
Eine weitere, besonders vorteilhafte Ausgestaltung der erfindungsgemäßen Prüfvorrichtung zeichnet sich dadurch aus, dass sie eine Befestigungsvorrichtung mit einer Mehrzahl von Befestigungspositionen für das Kraftstoff-Einspritzsystem umfasst, wobei jede Befestigungsposition einem bestimmten Abstand einer Längsachse des Kolbens des Kraftstoff- Einspritzsystems von der Schwenkachse des Hebels entspricht. Auf diese Weise werden Querkräfte, die durch das Betätigungselement in den Kolben eines Kraftstoff-Einspritzsystems eingeleitet werden, reduziert und die realen Einsatzbedingungen des zu prüfenden Kraftstoff- Einspritzsystems werden gut simuliert. Auch hier gilt wiederum, dass mehrere diskrete Befestigungspositionen vorgesehen sein können, oder es kann eine Vorrichtung verwendet werden, welche linear verschieblich ist und somit eine Vielzahl von Zwischenpositionen ermöglicht. Auch hier können Adapterelemente vorgesehen sein, mit denen unterschiedliche Kraftstoff- Einspritzvorrichtungen an den Befestigungspositionen der Befestigungsvorrichtung angebracht werden können. Dies erweitert den Anwendungsbereich der erfmdungsgemäßen Prüfvorrichtung auf ganz unterschiedliche Typen von Kraftstoff-Einspritzvorrichtungen bei gleichzeitig niedrigen Kosten, da die eigentliche Befestigungsvorrichtung für alle Kraftstoff-Einspritzvorrichtungen unverändert bleiben kann.Another, particularly advantageous embodiment of the test device according to the invention is characterized in that it comprises a fastening device with a plurality of mounting positions for the fuel injection system, each mounting position corresponds to a certain distance of a longitudinal axis of the piston of the fuel injection system from the pivot axis of the lever , In this way, lateral forces introduced by the actuating element into the pistons of a fuel injection system are reduced and the real operating conditions of the fuel injection system to be tested are well simulated. Again, it is true that several discrete mounting positions can be provided, or it can be used a device which is linearly displaceable and thus allows a plurality of intermediate positions. Again, adapter elements may be provided with which different fuel injection devices can be attached to the mounting positions of the fastening device. This extends the scope of the inventive test device to very different types of fuel injection devices at the same time low cost, since the actual fastening device for all fuel injectors can remain unchanged.
Dabei ist es besonders vorteilhaft, wenn die Befestigungspositionen so individualisiert sind, dass jedem Typ von Kraftfahrzeugsystem eine bestimmte Befestigungsposition unverwechselbar zugeordnet ist. Hierdurch wird sichergestellt, dass dem jeweiligen Prüfling der richtige Hub zugeordnet wird. Dies wiederum vereinfacht die Handhabung der erfindungsgemäßen Prüfvorrichtung und verringert die Häufigkeit falscher Prüfergebnisse.It is particularly advantageous if the mounting positions are individualized so that each type of motor vehicle system is assigned a specific attachment position unmistakable. This ensures that the correct test piece is assigned to the respective test object. This in turn simplifies the handling of the test device according to the invention and reduces the frequency of incorrect test results.
Eine weitere besonders vorteilhafte Ausgestaltung der erfmdungsgemäßen Prüfvorrichtung zeichnet sich dadurch aus, dass sie einen Sensor umfasst, der eine bei einer Betätigung des Kraftstoff-Einspritzsystems auftretende Reaktionskraft wenigstens mittelbar erfasst. Dies gestattet es, zusätzliche Fehler oder Mängel, beispielsweise bei der Dichtheit des getesteten Kraftstoff-Einspritzsystems, festzustellen, welche allein durch Messen der Einspritzmenge oder durch eine visuelle Prüfung nicht erkannt werden können.A further particularly advantageous embodiment of the test device according to the invention is characterized in that it comprises a sensor which detects at least indirectly a reaction force occurring upon actuation of the fuel injection system. This makes it possible to detect additional errors or deficiencies, for example in the tightness of the tested fuel injection system, which can not be detected by measuring the injection quantity alone or by a visual inspection.
Dabei kann der Sensor am Hebel angeordnet werden, so dass er die dort wirkende Kraft erfasst. Noch stärker bevorzugt ist es jedoch, wenn die Befestigungsvorrichtung schwenkbar gelagert und über eine Pendelstütze abgestützt ist und wenn der Sensor eine an der Pendelstütze oder an einem Lagerbock der Pendelstütze wirkende Kraft erfasst. Durch die letztgenannte Ausgestaltung werden Querkrafteinflüsse auf das Messergebnis minimiert und damit die Aussagekraft der Reaktionskraftmessung verbessert.In this case, the sensor can be arranged on the lever, so that it detects the force acting there. Even more preferred, however, is when the mounting device is pivotally supported and supported by a pendulum support and when the sensor detects a force acting on the pendulum support or on a bearing block of the pendulum support force. The last-mentioned embodiment minimizes lateral force influences on the measurement result and thus improves the validity of the reaction force measurement.
Vorgeschlagen wird auch, dass die Nockenwelle eine Mehrzahl nebeneinander angeordneter unterschiedlicher Nocken aufweist und der Hebel zusammen mit der Befestigungsvorrichtung für die Kraftstoff-Einspritzvorrichtung in axialer Richtung der Nockenwelle in unterschiedlicheIt is also proposed that the camshaft has a plurality of juxtaposed different cams and the lever together with the fastening device for the fuel injection device in the axial direction of the camshaft in different
Betriebspositionen verschiebbar ist, wobei der Hebel in jeder Betriebsposition mit einer anderen Nocke zusammenarbeitet. Damit können auch unterschiedliche Druckverläufe bei den getesteten Kraftstoff-Einspritzsystemen realisiert werden, ohne dass die Nocke aufwändig gewechselt werden muss. Dies reduziert die Rüstzeit bei der Verwendung der erfindungsgemäßen PrüfVorrichtung und reduziert auf diese Weise die Betriebskosten. Es versteht sich, dass in der Praxis die Verwendung von möglichst wenig Nocken angestrebt wird. Da bei identischem Hub die Nockenformen nur geringe Unterschiede aufweisen, werden annähernd gleich hohe Drücke erzielt. Allerdings ist es in jedem Falle sinnvoll, zunächst Referenzwerte durch entsprechende Referenzmessungen zu erfassen.Operating positions is displaced, wherein the lever cooperates in any operating position with another cam. This also allows different pressure profiles to be realized in the tested fuel injection systems, without the cam having to be exchanged in a complex manner must become. This reduces the set-up time when using the test device according to the invention and thus reduces the operating costs. It is understood that in practice the use of as few cams as possible is desired. Since with identical stroke the cam shapes have only slight differences, almost equally high pressures are achieved. However, it makes sense in any case first to record reference values by means of corresponding reference measurements.
Zeichnungendrawings
Nachfolgend wird ein besonders bevorzugtes Ausführungsbeispiel der vorliegenden Erfindung unter Bezugnahme auf die beiliegende Zeichnung näher erläutert. In der Zeichnung zeigen:Hereinafter, a particularly preferred embodiment of the present invention will be explained in more detail with reference to the accompanying drawings. In the drawing show:
Figur 1 eine schematische und teilweise geschnittene Darstellung einer Prüfvorrichtung für ein nockengetriebenes Kraftstoff-Einspritzsystem; undFigure 1 is a schematic and partially sectional view of a test device for a cam-driven fuel injection system; and
Figur 2 eine perspektivische, ebenfalls zum Teil geschnittene und stärker detaillierteFigure 2 is a perspective, also partly cut and more detailed
Darstellung der Prüfvorrichtung von Figur 1.Representation of the test apparatus of Figure 1.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Eine Prüfvorrichtung trägt in den Figuren 1 und 2 insgesamt das Bezugszeichen 10. Sie dient zum Prüfen eines nockengetriebenen Kraftstoff-Einspritzsystems, im vorliegenden Beispiel eines Pumpe-Düse-Einspritzsystems 12, welches jedoch nur in Figur 1 gezeigt ist. Zunächst sei dessen Aufbau und Funktion erläutert.A testing device carries in FIGS. 1 and 2 the reference numeral 10 as a whole. It is used to test a cam-driven fuel injection system, in the present example a pump-nozzle injection system 12, which however is shown only in FIG. First, its structure and function are explained.
Das Pumpe-Düse-Einspritzsystem 12 umfasst ein Gehäuse 14 mit einer Düsenspitze 16, die in eine Einspritzkammer 18 der Prüfvorrichtung 10 hineinragt. In dem Gehäuse 14 ist eine Düsennadel 20 verschieblich aufgenommen, die von einer Feder 22 in eine geschlossene Position beaufschlagt wird.The pump-nozzle injection system 12 comprises a housing 14 with a nozzle tip 16 which projects into an injection chamber 18 of the test apparatus 10. In the housing 14, a nozzle needle 20 is slidably received, which is acted upon by a spring 22 in a closed position.
Eine Pumpe des Pumpe-Düse-Einspritzsystems 12 ist mit 24 bezeichnet und umfasst einen Kolben 26, der einen Förderraum 28 begrenzt. Dieser ist mit einem Druckraum 30 verbunden, der von einer an der Düsennadel 20 ausgebildeten und in deren Öffnungsrichtung wirkenden Druckfläche 32 begrenzt wird. Der Förderraum 28 ist ferner über ein magnetisches Steuerventil 34 und eine Vorförderpumpe 36 mit einem Fluidbehälter 38 verbindbar, in dem im vorliegenden Fall ein Prüffluid bevorratet ist.A pump of the pump-nozzle injection system 12 is designated by 24 and comprises a piston 26 which delimits a delivery space 28. This is connected to a pressure chamber 30, which acts from one formed on the nozzle needle 20 and in the opening direction Pressure surface 32 is limited. The delivery chamber 28 is further connected via a magnetic control valve 34 and a feed pump 36 with a fluid container 38, in which a test fluid is stored in the present case.
Bei einem Saughub des Kolbens 26 wird bei geöffnetem Steuerventil 34 Prüffluid aus dem Fluidbehälter 38 in den Förderraum 28 angesaugt. Bei geschlossenem Steuerventil 34 wird bei einem Förderhub des Kolbens 26 das im Förderraum 28 eingeschlossene Prüffluid komprimiert, was zu einer entsprechenden Druckerhöhung im Druckraum 30 führt. Übersteigt die an der Druckfläche 32 angreifende hydraulische Kraft die Kraft der Feder 22, öffnet die Düsennadel 20, und Prüffluid wird von der Düsenspitze 16 in die Einspritzkammer 18 eingespritzt, wo es gesammelt und weitergeleitet wird.During a suction stroke of the piston 26, test fluid is sucked out of the fluid container 38 into the delivery chamber 28 when the control valve 34 is open. When the control valve 34 is closed, the test fluid enclosed in the delivery chamber 28 is compressed during a delivery stroke of the piston 26, which leads to a corresponding pressure increase in the pressure chamber 30. If the hydraulic force acting on the pressure surface 32 exceeds the force of the spring 22, the nozzle needle 20 opens and test fluid is injected from the nozzle tip 16 into the injection chamber 18, where it is collected and passed on.
Für die Prüfung des Pumpe-Düse-Einspritzsystems 12 verfügt die Prüfvorrichtung 10 über zwei wesentliche Teilvorrichtungen: Eine Betätigungsvorrichtung 40 und eine Befestigungsvorrichtung 42. Zunächst zu letzterer:For testing the pump-nozzle injection system 12, the test apparatus 10 has two essential sub-apparatuses: an actuator 40 and a fixture 42. First to the latter:
Die Befestigungsvorrichtung 42 umfasst eine Führungsplatte 44 mit mehreren parallel zueinander angeordneten Führungsnuten 46, von denen aus Gründen der Übersichtlichkeit nur eine ein Bezugszeichen trägt. Durch diese Führungsnuten 46 werden unterschiedliche Befestigungspositionen für ein als Adapterplatte 48 ausgebildetes Adapterelement definiert. An dieser Adapterplatte 48 ist wiederum auf hier nicht näher dargestellte Art und Weise das Gehäuse 14 des Pumpe-Düse-Einspritzsystems 12 befestigt.The fastening device 42 comprises a guide plate 44 with a plurality of mutually parallel guide grooves 46, of which, for reasons of clarity, only one carries a reference numeral. By means of these guide grooves 46, different attachment positions are defined for an adapter element designed as an adapter plate 48. At this adapter plate 48, in turn, the housing 14 of the pump-nozzle injection system 12 is fixed in a manner not shown here.
Die Führungsplatte 44 ist in 50 an einer stationären Basis 52 der Prüfvorrichtung 10 gelenkig gelagert. Um im Betrieb ein Kippen der Führungsplatte 44 zu verhindern, stützt sich diese an ihrem vom Gelenk 50 beabstandeten Ende über eine Pendelstütze 54 an einem Lagerbock 56 ab, der ebenfalls mit der stationären Basis 52 verbunden ist. Am Lagerbock 56 ist ein als Dehnmessstreifen 58 ausgebildeter Sensor angeordnet, der eine auf den Lagerbock 56 über die Pendelstütze 54 einwirkende Querkraft erfasst.The guide plate 44 is articulated in 50 to a stationary base 52 of the test apparatus 10. In order to prevent tilting of the guide plate 44 during operation, this is supported at its end remote from the joint 50 via a pendulum support 54 on a bearing block 56, which is also connected to the stationary base 52. On the bearing block 56 designed as a strain gauge 58 sensor is arranged, which detects a force acting on the bearing block 56 via the pendulum support 54 transverse force.
Die Betätigungsvorrichtung 40 ist folgendermaßen aufgebaut. Ein Schlepphebel 60 ist in 62 wieder an der stationären Basis 52 schwenkbar gelagert. Das Schwenkgelenk 62 ist dabei seitlich beabstandet von einer Längsachse 64 des Kolbens 26 des Pumpe-Düse-Einspritzsystems 12. Ein Arm 66 des Schlepphebels 60 erstreckt sich zum Kolben 26 hin. An ihm ist eine ein Zwischenelement bildende Zwischenplatte 68 befestigt, in der mehrere Gewindebohrungen 70 vorhanden sind (aus Darstellungsgründen ist wieder nur eine mit eniem Bezugszeichen versehen). Diese bilden Befestigungspositionen für ein mit einem Kugelkopf versehenes Betätigungselement 72. Wie aus Figur 1 ersichtlich ist, sind die Gewindebohrungen 70 von der durch das Gelenk 62 definierten Schwenkachse des Schlepphebels 60 unterschiedlich beabstandet. Der Kugelkopf des Betätigungselement 22 arbeitet mit einer komplementären Ausnehmung (ohne Bezugszeichen) im Kolben 26 des Pumpe-Düse-Einspritzsystems 12 zusammen.The actuator 40 is constructed as follows. A drag lever 60 is pivotally mounted in 62 again on the stationary base 52. The pivot joint 62 is laterally spaced from a longitudinal axis 64 of the piston 26 of the pump-nozzle injection system 12th Arm 66 of the finger lever 60 extends toward the piston 26. At him an intermediate element forming an intermediate plate 68 is fixed, in which a plurality of threaded holes 70 are present (for illustrative reasons, only one is provided with a reference numeral). These form mounting positions for a ball-headed actuator 72. As can be seen from Figure 1, the threaded holes 70 are spaced from the defined by the hinge 62 pivot axis of the finger lever 60 different. The ball head of the actuator 22 cooperates with a complementary recess (without reference numeral) in the piston 26 of the pump-nozzle injection system 12 together.
Auf der vom Kolben 26 abgewandten Seite des Arms 66 ist an diesem ein Rollenhalter 74 mit einer Rolle 76 angeordnet. Diese arbeitet wiederum mit einer Nocke 78 einer Nockenwelle 80 zusammen. Diese wird von einem hier nicht dargestellten Antriebsmotor, beispielsweise einem Elektromotor, angetrieben. Ein zweiter Arm 82 des Schlepphebels 60 wird von einer Druckfeder 84 beaufschlagt, die zwischen dem Arm 82 und wiederum der stationären Basis 52 verspannt ist. Auf diese Weise wird die Rolle 76 ständig gegen die Nocke 78 gedrückt.On the side facing away from the piston 26 of the arm 66, a roller holder 74 with a roller 76 is arranged on this. This in turn cooperates with a cam 78 of a camshaft 80. This is driven by a drive motor, not shown here, for example an electric motor. A second arm 82 of the drag lever 60 is acted upon by a compression spring 84 which is clamped between the arm 82 and in turn the stationary base 52. In this way, the roller 76 is constantly pressed against the cam 78.
Die Prüfvorrichtung 10 arbeitet folgendermaßen: Bei einer Drehung der Nockenwelle 80 wird der Schlepphebel 60 um seine Schwenkachse 62 verschwenkt. Aufgrund des Hebelarms zwischen dem Betätigungselement 72 und der durch das Gelenk 62 definierten Schwenkachse (dieser Hebelarm ist in Figur 1 mit 86 bezeichnet) ergibt sich für jede Gewindebohrung 70 ein bestimmter Hub. Dieser ist bei jener Gewindebohrung 70, in der in Figur 1 das Betätigungselement 72 eingeschraubt ist, am geringsten. Entsprechend ergibt sich ein vergleichsweise geringer Hub des Kolbens 26. Die Reaktionskraft, die durch den Druckaufbau im Förderraum 28 über das Gehäuse 14 und die Adapterplatte 48 in die Führungsplatte 44 eingeleitet wird, wird über die Pendelstütze 54 in den Lagerbock 56 übertragen und dort vom Dehnmessstreifen 58 erfasst.The test apparatus 10 operates as follows: Upon rotation of the camshaft 80, the drag lever 60 is pivoted about its pivot axis 62. Due to the lever arm between the actuating element 72 and the pivot axis defined by the joint 62 (this lever arm is designated by 86 in FIG. 1), a specific stroke results for each threaded bore 70. This is at the threaded hole 70, in which the actuator 72 is screwed in Figure 1, the lowest. The reaction force which is introduced by the pressure build-up in the delivery chamber 28 via the housing 14 and the adapter plate 48 in the guide plate 44 is transmitted via the pendulum support 54 in the bearing block 56 and there from the strain gauge 58 recorded.
Soll das gleiche Pumpe-Düse-Einspritzsystem 12 mit größerem Hub getestet werden, wird die Adapterplatte 48 einfach in anderen Führungsnuten 46 an der Führungsplatte 44 befestigt und das Betätigungselement 72 in eine andere der Gewindebohrungen 70 eingeschraubt. Soll ein anderes Pumpe-Düse-Einspritzsystem 12 getestet werden, wird eine andere Adapterplatte 48 verwendet. Möglich, jedoch nicht dargestellt, ist es, dass die Führungsnuten individualisiert sind, so dass jedem Typ von Kraftstoff-Einspritzsystem eine bestimmte Befestigungsposition und damit auch ein bestimmter Hub unverwechselbar zugeordnet ist. In einem ebenfalls nicht dargestellten Ausfuhrungsbeispiel kann darüber hinaus die Befestigungsvorrichtung zusammen mit der Betätigungsvorrichtung (ohne Nockenwelle) in Längsrichtung der Nockenwelle verschoben werden. Die entsprechende Nockenwelle verfügt dann über eine Mehrzahl unterschiedlicher und nebeneinander angeordneter Nocken, so dass je nach Position der Betätigungseinrichtung die Rolle mit einer anderen Nocke zusammenarbeitet. If the same pump nozzle injection system 12 are tested with a larger stroke, the adapter plate 48 is simply mounted in other guide grooves 46 on the guide plate 44 and the actuator 72 is screwed into another of the threaded holes 70. If another pump-injector system 12 is to be tested, another adapter plate 48 is used. Possible, but not shown, is that the guide grooves are individualized, allowing each type of fuel injection system a specific mounting position and thus also a specific hub is unmistakably assigned. In an exemplary embodiment, also not shown, beyond the fastening device can be moved together with the actuator (without camshaft) in the longitudinal direction of the camshaft. The corresponding camshaft then has a plurality of different and juxtaposed cams, so that depending on the position of the actuator, the roller cooperates with another cam.

Claims

Ansprüche claims
1. PrüfVorrichtung (10) für ein nockengetriebenes Kraftstoff-Einspritzsystem (12), insbesondere ein Pumpe-Düse- oder Pumpe-Leitung-Düse-Einspritzsystem, mit einer Nockenwelle (80), die über einen Hebel (60) wenigstens mittelbar auf einen Kolben (26) des Kraftstoff-Einspitzsystems (12) wirken kann, dadurch gekennzeichnet, dass der Hebel (60) eine Mehrzahl von Befestigungspositionen (70) für ein Betätigungselement (72) aufweist, welches auf den Kolben (26) wirken kann, und dass die Befestigungspositionen (70) von einer Schwenkachse (62) des Hebels (60) unterschiedlich beabstandet sind.First testing device (10) for a cam-driven fuel injection system (12), in particular a pump-nozzle or pump-line-nozzle injection system, with a camshaft (80) via a lever (60) at least indirectly on a piston (26) of the fuel injection system (12), characterized in that the lever (60) has a plurality of fixing positions (70) for an actuating element (72) which can act on the piston (26), and in that Mounting positions (70) are spaced from a pivot axis (62) of the lever (60) differently.
2. Prüfvorrichtung (10) nach Anspruch 1, dadurch gekennzeichnet, dass der Hebel (60) ein austauschbares Zwischenelement (68) umfasst, an dem die unterschiedlichen2. testing device (10) according to claim 1, characterized in that the lever (60) comprises an exchangeable intermediate element (68) on which the different
Befestigungspositionen (70) für das Betätigungselement (72) vorhanden sind.Attachment positions (70) for the actuating element (72) are present.
3. PrüfVorrichtung (10) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Befestigungspositionen durch Gewindebohrungen (70) gebildet sind, in die das Betätigungselement (72) eingeschraubt werden kann.3. Test device (10) according to any one of claims 1 or 2, characterized in that the fastening positions are formed by threaded holes (70) into which the actuating element (72) can be screwed.
4. PrüfVorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Befestigungsvorrichtung (42) mit einer Mehrzahl von Befestigungspositionen (46) für das Kraftstoff-Einspritzsystem (12) umfasst, wobei jede Befestigungsposition (46) einem bestimmten Abstand einer Längsachse (64) des Kolbens (26) des Kraftstoff-Einspritzsystems (12) von der Schwenkachse (62) des Hebels (60) entspricht.4. testing device (10) according to any one of the preceding claims, characterized in that it comprises a fastening device (42) having a plurality of fastening positions (46) for the fuel injection system (12), wherein each fastening position (46) a certain distance Longitudinal axis (64) of the piston (26) of the fuel injection system (12) from the pivot axis (62) of the lever (60) corresponds.
5. PrüfVorrichtung (10) nach Anspruch 4, dadurch gekennzeichnet, dass sie eine Mehrzahl von Adapterelementen (48) umfasst, mit denen unterschiedliche Kraftstoff-Einspritzvorrichtungen (12) an den Befestigungspositionen (46) der Befestigungsvorrichtung (42) angebracht werden können. 5. A test device (10) according to claim 4, characterized in that it comprises a plurality of adapter elements (48), with which different fuel injectors (12) can be attached to the mounting positions (46) of the fastening device (42).
6. Prüfvorrichtung (10) nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Befestigungspositionen (46) individualisiert sind, so dass jedem Typ von Kraftstoff- Einspritzsystem (12) eine bestimmte Befestigungsposition (46) unverwechselbar zugeordnet ist.6. testing device (10) according to any one of claims 4 or 5, characterized in that the fastening positions (46) are individualized, so that each type of fuel injection system (12) is assigned a specific mounting position (46) unmistakably.
7. Prüfvorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Sensor (58) umfasst, der eine bei einer Betätigung des Kraftstoff- Einspritzsystems (12) auftretende Reaktionskraft wenigstens mittelbar erfasst.7. testing device (10) according to any one of the preceding claims, characterized in that it comprises a sensor (58) which detects a reaction force occurring during actuation of the fuel injection system (12) at least indirectly.
8. Prüfvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass der Sensor eine am Hebel wirkende Kraft erfasst.8. Testing device according to claim 7, characterized in that the sensor detects a force acting on the lever.
9. Prüfvorrichtung (10) nach Anspruch 7, dadurch gekennzeichnet, dass die Befestigungsvorrichtung (42) schwenkbar gelagert und über eine Pendelstütze (54) abgestützt ist, und dass der Sensor (58) eine an der Pendelstütze (54) und/oder an einem Lagerbock (56) der Pendelstütze (54) wirkende Kraft erfasst.9. testing device (10) according to claim 7, characterized in that the fastening device (42) is pivotally mounted and supported by a pendulum support (54), and that the sensor (58) on the pendulum support (54) and / or on a Bearing (56) of the pendulum support (54) detected force.
10. Prüfvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Nockenwelle eine Mehrzahl nebeneinander angeordneter unterschiedlicher Nocken aufweist und der Hebel zusammen mit der Befestigungsvorrichtung für die Kraftstoff- Einspritzvorrichtung in axialer Richtung der Nockenwelle in unterschiedliche Betriebspositionen verschiebbar ist, wobei der Hebel in jeder Betriebsposition mit einer anderen Nocke zusammenarbeitet. 10. Testing device according to one of the preceding claims, characterized in that the camshaft has a plurality of juxtaposed different cams and the lever is displaceable together with the fastening device for the fuel injection device in the axial direction of the camshaft in different operating positions, wherein the lever in each Operating position cooperates with another cam.
EP06819219A 2005-12-27 2006-11-02 Test apparatus for a cam-driven fuel injection system, in particular a pump/nozzle or pump/line/nozzle injection system Active EP1969226B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062453A DE102005062453A1 (en) 2005-12-27 2005-12-27 Test rig for automotive fuel injection system has a lever that engages with different attachment points
PCT/EP2006/068022 WO2007073967A1 (en) 2005-12-27 2006-11-02 Test apparatus for a cam-driven fuel injection system, in particular a pump/nozzle or pump/line/nozzle injection system

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EP1969226A1 true EP1969226A1 (en) 2008-09-17
EP1969226B1 EP1969226B1 (en) 2010-06-23

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US (1) US7735361B2 (en)
EP (1) EP1969226B1 (en)
CN (1) CN101351637B (en)
AT (1) ATE472055T1 (en)
BR (1) BRPI0621260B1 (en)
DE (2) DE102005062453A1 (en)
ES (1) ES2346083T3 (en)
WO (1) WO2007073967A1 (en)

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CN104895722A (en) * 2015-06-09 2015-09-09 资阳蜀达科技有限公司 Electronic oil injector testing stand

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EP1969226B1 (en) 2010-06-23
US20080282785A1 (en) 2008-11-20
CN101351637A (en) 2009-01-21
ES2346083T3 (en) 2010-10-08
WO2007073967A1 (en) 2007-07-05
DE502006007294D1 (en) 2010-08-05
ATE472055T1 (en) 2010-07-15
BRPI0621260A2 (en) 2011-12-06
DE102005062453A1 (en) 2007-07-05
CN101351637B (en) 2011-03-16
BRPI0621260B1 (en) 2018-12-18
US7735361B2 (en) 2010-06-15

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