EP1969226B1 - Dispositif de test pour un system d'injection de carburant entraine par came, en particulier un systeme d'injection par gicleur et pompe ou par gicleur, conduit et pompe - Google Patents

Dispositif de test pour un system d'injection de carburant entraine par came, en particulier un systeme d'injection par gicleur et pompe ou par gicleur, conduit et pompe Download PDF

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Publication number
EP1969226B1
EP1969226B1 EP06819219A EP06819219A EP1969226B1 EP 1969226 B1 EP1969226 B1 EP 1969226B1 EP 06819219 A EP06819219 A EP 06819219A EP 06819219 A EP06819219 A EP 06819219A EP 1969226 B1 EP1969226 B1 EP 1969226B1
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EP
European Patent Office
Prior art keywords
fuel injection
test apparatus
injection system
lever
fastening
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
EP06819219A
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German (de)
English (en)
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EP1969226A1 (fr
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
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Robert Bosch GmbH
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Publication date
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Publication of EP1969226A1 publication Critical patent/EP1969226A1/fr
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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

  • 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 fuel is injected directly from a fuel injection system under high pressure into the combustion chamber.
  • Various types of fuel injection systems are used, 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.
  • 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.
  • 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 with 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.
  • an injector inspection apparatus in which a plunger of the test apparatus is moved by a lever to generate an injection pressure for the injectors to be inspected.
  • a camshaft is not provided in this tester.
  • 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.
  • 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.
  • the test device according to the invention is also characterized in that it comprises a fastening device with a plurality of fastening positions for the fuel injection system, each mounting position corresponding 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 actuator 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.
  • the lever comprises an exchangeable intermediate element on which the different attachment positions for the actuating element are present.
  • the scope of the test device is further expanded, 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.
  • 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.
  • 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 test device according to the invention 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.
  • 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.
  • 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 cooperates in each 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 apparatus 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.
  • a tester wears in the FIGS. 1 and 2 Overall, the reference numeral 10. It is used to test a cam-driven fuel injection system, in the present example of a pump-injector system 12, which, however, only in FIG. 1 is shown. 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).
  • These form attachment positions for a ball-headed actuator 72 As shown in FIG. 1 it can be seen, the threaded bores 70 are spaced differently from the pivot axis of the finger lever 60 defined by the hinge 62.
  • 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 actuator 72 and the pivot axis defined by the hinge 62 (this lever arm is in FIG. 1 denoted by 86) results for each threaded bore 70 a certain stroke. This is at that threaded hole 70 in the in FIG. 1 the actuator 72 is screwed in, least. Accordingly, there is a comparatively small stroke of the piston 26. 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 embodiment also not shown, moreover, 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.

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

Claims (9)

  1. Dispositif de contrôle (10) pour un système d'injection de carburant (12) entraîné par came, en particulier un système d'injection par gicleur et pompe ou par gicleur, conduit et pompe, comprenant un arbre à cames (80) qui peut agir par le biais d'un levier (60) au moins de manière indirecte sur un piston (26) du système d'injection de carburant (12), caractérisé en ce que le levier (60) présente une pluralité de positions de fixation (70) pour un élément d'actionnement (72), qui peut agir sur le piston (26), en ce que les positions de fixation (70) sont espacées différemment d'un axe de pivotement (62) du levier (60) et en ce que le dispositif de contrôle (10) comprend un dispositif de fixation (42) ayant une pluralité de positions de fixation (46) pour le système d'injection de carburant (12), chaque position de fixation (46) correspondant à une distance déterminée d'un axe longitudinal (64) du piston (26) du système d'injection de carburant (12) à l'axe de pivotement (62) du levier (60).
  2. Dispositif de contrôle (10) selon la revendication 1, caractérisé en ce que le levier (60) comprend un élément intermédiaire remplaçable (68) sur lequel sont prévues les différentes positions de fixation (70) pour l'élément d'actionnement (72).
  3. Dispositif de contrôle (10) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les positions de fixation sont formées par des alésages filetés (70), dans lesquels peut être vissé l'élément d'actionnement (72).
  4. Dispositif de contrôle (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une pluralité d'éléments adaptateurs (48) avec lesquels différents dispositifs d'injection de carburant (12) peuvent être montés sur les positions de fixation (46) du dispositif de fixation (42).
  5. Dispositif de contrôle (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les positions de fixation (46) sont individualisées, de sorte que l'on associe de manière non remplaçable à chaque type de système d'injection de carburant (12) une position de fixation déterminée (46).
  6. Dispositif de contrôle (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un capteur (58) qui détecte de manière au moins indirecte une force de réaction se produisant lors d'un actionnement du système d'injection de carburant (12).
  7. Dispositif de contrôle selon la revendication 6, caractérisé en ce que le capteur détecte une force agissant sur le levier.
  8. Dispositif de contrôle (10) selon la revendication 6, caractérisé en ce que le dispositif de fixation (42) est monté de manière pivotante et est supporté par le biais d'un support pendulaire (54), et en ce que le capteur (58) détecte une force agissant sur le support pendulaire (54) et/ou sur un coussinet (56) du support pendulaire (54).
  9. Dispositif de contrôle selon l'une quelconque des revendications précédentes, caractérisé en ce que l'arbre à cames présente une pluralité de cames différentes disposées les unes à côté des autres, et le levier peut être déplacé conjointement avec le dispositif de fixation pour le dispositif d'injection de carburant dans la direction axiale de l'arbre à cames dans différentes positions de fonctionnement, le levier coopérant dans chaque position de fonctionnement avec une autre came.
EP06819219A 2005-12-27 2006-11-02 Dispositif de test pour un system d'injection de carburant entraine par came, en particulier un systeme d'injection par gicleur et pompe ou par gicleur, conduit et pompe Active EP1969226B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005062453A DE102005062453A1 (de) 2005-12-27 2005-12-27 Prüfvorrichtung für ein nockengetriebenes Kraftstoff-Einspritzsystem, insbesondere ein Pumpe-Düse- oder Pumpe-Leitung-Düse-Einspritzsystem
PCT/EP2006/068022 WO2007073967A1 (fr) 2005-12-27 2006-11-02 Dispositif de test pour un system d'injection de carburant entraine par came, en particulier un systeme d'injection par gicleur et pompe ou par gicleur, conduit et pompe

Publications (2)

Publication Number Publication Date
EP1969226A1 EP1969226A1 (fr) 2008-09-17
EP1969226B1 true EP1969226B1 (fr) 2010-06-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819219A Active EP1969226B1 (fr) 2005-12-27 2006-11-02 Dispositif de test pour un system d'injection de carburant entraine par came, en particulier un systeme d'injection par gicleur et pompe ou par gicleur, conduit et pompe

Country Status (8)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038760A1 (de) * 2010-08-02 2012-02-02 Hochschule Reutlingen Haltevorrichtung für Kraftstoffinjektor
CN104895722A (zh) * 2015-06-09 2015-09-09 资阳蜀达科技有限公司 一种电子喷油器试验台

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857759A (en) * 1958-10-28 kiene
US2744407A (en) * 1956-05-08 Injector testing device
US2517766A (en) * 1950-08-08 Nozzle tester
US3117444A (en) * 1960-04-27 1964-01-14 Hartridge Ltd Leslie Injection nozzle tester
US3282092A (en) * 1964-01-02 1966-11-01 Kiene Diesel Accessories Inc Hydraulic nozzle tester
US3408862A (en) * 1966-08-23 1968-11-05 Friedmann & Maier Ag Device for testing injection nozzles
GB1236238A (en) * 1967-09-06 1971-06-23 Motorpal Johlava Narodni Podni Improvements in or relating to fuel injection systems
GB1548908A (en) * 1975-10-17 1979-07-18 Hartridge Ltd L Apparatus fortesting fuel injectors
AT357377B (de) * 1978-01-17 1980-07-10 List Hans Dieseleinspritzpumpe mit einer schraegkanten- steuerung und einem drehzahlregler
GB8329399D0 (en) * 1983-11-03 1983-12-07 Churchill V L Ltd Diesel engine injector tester
CN2086308U (zh) * 1989-05-09 1991-10-09 东北林业大学 柴油机燃油系试验台
CN2157992Y (zh) * 1993-02-27 1994-03-02 杜国辉 柱塞式喷油泵供油量校正器
DE4446905C2 (de) * 1994-12-27 1996-12-05 Anton Dipl Ing Dolenc Einspritzpumpeneinheit und Verfahren zu deren Einstellung
DE10146772C2 (de) * 2001-09-22 2003-09-25 Orange Gmbh Messvorrichtung zum Messen des Kolbenhubes einer Kraftstoffeinspritzpumpe
DE10150786C2 (de) * 2001-10-15 2003-08-07 Siemens Ag Verfahren und Vorrichtung zum automatischen Einstellen von Injektoren
US7089789B2 (en) * 2002-03-19 2006-08-15 Stanadyne Corporation System for calibrating an integrated injection nozzle and injection pump
DK200301534A (da) * 2003-10-20 2005-04-21 Ib Obel Pedersen As Fremgangsmåde til afprövning af en brændstof-indspröjningsventil til en dieselmotor
JP4119864B2 (ja) * 2004-03-31 2008-07-16 三菱重工業株式会社 内燃機関の燃料噴射装置

Also Published As

Publication number Publication date
WO2007073967A1 (fr) 2007-07-05
ATE472055T1 (de) 2010-07-15
CN101351637B (zh) 2011-03-16
DE102005062453A1 (de) 2007-07-05
CN101351637A (zh) 2009-01-21
US20080282785A1 (en) 2008-11-20
US7735361B2 (en) 2010-06-15
BRPI0621260B1 (pt) 2018-12-18
EP1969226A1 (fr) 2008-09-17
ES2346083T3 (es) 2010-10-08
DE502006007294D1 (de) 2010-08-05
BRPI0621260A2 (pt) 2011-12-06

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