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 systemInfo
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 63
- 239000007924 injection Substances 0.000 title claims abstract description 63
- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 239000000446 fuel Substances 0.000 title claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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
Description
Claims
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1969226A1 true EP1969226A1 (en) | 2008-09-17 |
EP1969226B1 EP1969226B1 (en) | 2010-06-23 |
Family
ID=37632587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06819219A Active EP1969226B1 (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 |
Country Status (8)
Country | Link |
---|---|
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) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038760A1 (en) * | 2010-08-02 | 2012-02-02 | Hochschule Reutlingen | Holding device for fuel injector |
CN104895722A (en) * | 2015-06-09 | 2015-09-09 | 资阳蜀达科技有限公司 | Electronic oil injector testing stand |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857759A (en) * | 1958-10-28 | kiene | ||
US2517766A (en) * | 1950-08-08 | Nozzle tester | ||
US2744407A (en) * | 1956-05-08 | Injector testing device | ||
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 (en) * | 1978-01-17 | 1980-07-10 | List Hans | DIESEL INJECTION PUMP WITH A SLOPE EDGE CONTROL AND A SPEED CONTROLLER |
GB8329399D0 (en) * | 1983-11-03 | 1983-12-07 | Churchill V L Ltd | Diesel engine injector tester |
CN2086308U (en) * | 1989-05-09 | 1991-10-09 | 东北林业大学 | Diesel engine fuel system test table |
CN2157992Y (en) * | 1993-02-27 | 1994-03-02 | 杜国辉 | Fuel supply quantity corrector for plunger-type fuel spray pump |
DE4446905C2 (en) * | 1994-12-27 | 1996-12-05 | Anton Dipl Ing Dolenc | Injection pump unit and method for its adjustment |
DE10146772C2 (en) * | 2001-09-22 | 2003-09-25 | Orange Gmbh | Measuring device for measuring the piston stroke of a fuel injection pump |
DE10150786C2 (en) * | 2001-10-15 | 2003-08-07 | Siemens Ag | Method and device for automatically adjusting injectors |
US7089789B2 (en) * | 2002-03-19 | 2006-08-15 | Stanadyne Corporation | System for calibrating an integrated injection nozzle and injection pump |
DK200301534A (en) * | 2003-10-20 | 2005-04-21 | Ib Obel Pedersen As | Method of testing a fuel injection valve for a diesel engine |
JP4119864B2 (en) * | 2004-03-31 | 2008-07-16 | 三菱重工業株式会社 | Fuel injection device for internal combustion engine |
-
2005
- 2005-12-27 DE DE102005062453A patent/DE102005062453A1/en not_active Withdrawn
-
2006
- 2006-11-02 EP EP06819219A patent/EP1969226B1/en active Active
- 2006-11-02 WO PCT/EP2006/068022 patent/WO2007073967A1/en active Application Filing
- 2006-11-02 BR BRPI0621260A patent/BRPI0621260B1/en active IP Right Grant
- 2006-11-02 CN CN2006800498167A patent/CN101351637B/en active Active
- 2006-11-02 US US12/096,521 patent/US7735361B2/en active Active
- 2006-11-02 AT AT06819219T patent/ATE472055T1/en active
- 2006-11-02 DE DE502006007294T patent/DE502006007294D1/en active Active
- 2006-11-02 ES ES06819219T patent/ES2346083T3/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007073967A1 * |
Also Published As
Publication number | Publication date |
---|---|
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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