EP1377748A1 - Prüfstand zur ermittlung von drücken an druckbeaufschlagten bauteilen - Google Patents
Prüfstand zur ermittlung von drücken an druckbeaufschlagten bauteilenInfo
- Publication number
- EP1377748A1 EP1377748A1 EP02737755A EP02737755A EP1377748A1 EP 1377748 A1 EP1377748 A1 EP 1377748A1 EP 02737755 A EP02737755 A EP 02737755A EP 02737755 A EP02737755 A EP 02737755A EP 1377748 A1 EP1377748 A1 EP 1377748A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- component
- switching valve
- storage container
- test
- 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
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
Definitions
- test benches To determine reference pressures or safety-relevant pressures to which pressurized components are exposed, these components are subjected to different pressures on test benches to determine whether the expected relative movement of a subcomponent to another component component occurs when a certain pressure level is applied to the component. Depending on whether the pressurized component is to be checked for one or more pressure levels, the component is subjected to test routines on several test benches.
- test benches that are provided in the manufacturing process of components at certain critical manufacturing or assembly stages, the components are tested with regard to their manufacturing accuracy with regard to dimensional accuracy, concentricity or surface quality - to name examples - in order to avoid reject finishing.
- test benches If functions, such as components of injectors for injecting 25 fuel into the combustion chambers of internal combustion engines, are to be ascertained that occur at certain pressures, i.e. the later operating pressures of the component, these pressures are generated in test benches. If, for example, injectors in a 2-spring-holder design were examined for defined opening pressures that were set in accordance with the design specifications, the injectors were forced to be tested on 30 multiple test benches. Depending on the pressures to be checked, for example a first opening pressure and a second opening pressure, the pressures are specified accordingly on the individual test benches, so that a switch must be made from test bench to test bench in order, for example, to test the first and second opening pressures on a 2- To determine the pen holder injector.
- test benches In addition to changing from test bench to test bench to determine the respective opening pressures on a pressurized component, the fact that a large number of test benches must be kept which have a large number of identical component such as valves, pressure accumulator lines, evaluation PCs etc. and differ from one another only in the test pressures that can be generated.
- pressurized components such as, for example, fuel ejectors
- opening pressures that occur in components of such pressurized components that are used, for example, in fuel injection systems.
- a first opening pressure and a second opening pressure of a 2-spring holder injector can be checked.
- two pressures can be set on a test bench or a test bench, so that a separate test bench can be saved, for example, to determine the second opening pressure.
- the components used on a test bench or test bench can therefore be used multiple times.
- the determined pressure values and other test pressures relevant to the function and the operational safety can be documented and stored, so that an almost complete proof of the quality of the manufactured products can be provided.
- the processing of the determined pressure values can take place in an evaluation electronics with powerful PCs, so that on the one hand a large number of values can be processed reliably, on the other hand there are statements which extend over longer production periods and which reveal weaknesses in the manufacturing process which can be reacted to.
- test benches or test benches configured according to the invention can also be used to check fuel pumps, pressure relief valves or other pressurized components.
- FIG. 1 shows a hand test bench with additional storage volume and two 3/2-way valves for measuring a first pressure level
- FIG. 2 shows the hand test stand as shown in FIG. 1 with two 3/2-way valves in a switch position suitable for filling the storage volume.
- FIG. 1 shows a hand test bench with an additional storage volume with two 3/2-way valves, which is in the operating position for measuring a first pressure level on a pressurized component to be checked.
- the component 12 or 13 to be checked as shown in FIG. 1 can be, for example, a nozzle holding body 12 with a nozzle 13 accommodated thereon.
- a pressure is applied to a first switching valve 2, which can be designed, for example, as a 3/2-way solenoid valve, via the pressure source 1.
- the first 3/2-way valve 2 releases the connection between the test line 3 and the pressure source 1, so that the component 12 or 13 to be checked can be subjected to a first pressure level.
- the pressure level prevailing in the test line 3 is also present via the branch 14 at a pressure sensor 15, in which the pressure signals are converted into signals which can be further processed in an evaluation electronics 16.
- an evaluation electronics 16 Via an input / output unit downstream of the evaluation electronics 16, for example a PC 17, the pressure values obtained as well as other safety-relevant values can be displayed, stored permanently and thus documented for each component 12 or 13 tested.
- the first 3/2-way valve 2 When the component 12 or 13 to be checked is pressurized with a first pressure level, the first 3/2-way valve 2 is in the first switching position 2.1 shown in FIG.
- Another, second 3/2-way valve which can preferably be designed as a solenoid valve, is identified by reference numeral 5 and is placed in a first switching position 5.1.
- a storage container 10 is assigned to the second switching valve 5 via a feed section 7.
- the storage container 10 can be designed as a cylindrical component, in which a piston 8 moves in the horizontal direction or in the vertical direction, depending on the embodiment.
- the piston 8 is on its side contacting the inner surface of the storage container 10 with a piston provided sealing ring 9 and is acted upon by a spring element 18.
- the cross-sectional area of the piston 8 is identified by reference number 19.
- a pressure volume 11 is enclosed between the piston end face and the container wall of the storage container 10 and is under a pressure which is dependent on the prestressing force of the spring element 18.
- FIG. 2 shows a test bench according to FIG. 1 with two 3/2-way valves, a switching position being set which serves to pressurize the storage container.
- the first 3/2-way valve is placed in its second switching position 2.2.
- the test line 3 which extends to the component 12 or 13 to be checked, is separated from the pressure source 1.
- the filling line 4 is acted upon in the switching position 2.2 of the first 3/2 way valve via the pressure source 1.
- the further 3/2-way valve 5 is moved into its first switching position 5.1, so that the pressure source 1 acts on the feed line 7 via the filling line 4 and a check valve 6 accommodated in the second 3/2-way valve 5.
- an oil volume enters the storage container 10 via the feed line 7, so that a second pressure level builds up between the boundary wall of the storage container 10 and the end face of the piston 8 accommodated therein and loaded with a spring element 18.
- the pressure inside the storage container 10 is denoted by p.
- This second pressure level depends on the one hand on the oil volume entering via the supply line 7; on the other hand, it depends on the closing force generated by the spring element 18 and acting on the movable piston 8.
- the first 3/2-way valve 2 After a second pressure level has been built up in the pressure chamber 11, the first 3/2-way valve 2 initially remains in its second switching position 2.2, which is used to fill the additional storage tank 10 just described. In contrast, the further 3/2-way valve 5 is transferred from its first switching position 5.1 to its second switching position 5.2. As a result, the pressure present in the pressure chamber 11, ie the second higher pressure, is at the component 12 or 13 to be checked via the supply line 7 and the test line 3 on. In the second switching position 5.2 of the second 3/2-way valve 5, the filling line 4 connected to the pressure source 1 is blocked, so that the test line 3 to the component 12 or 13 to be checked is used exclusively with the higher pressure generated in the additional storage container 10 Example 500 bar can be applied.
- the second pressure which is at a much higher level than the first pressure, is also present in the branch 14 of the test line 3 and is converted at a pressure transducer 15 into signals which can be processed further.
- a digital signal processor is accommodated, which carries out further processing of the recorded first and second pressures, so that output, further processing, storage and complete documentation of the component 12 to be checked or 13 received pressure values is possible individually. With this, a complete proof can be carried out with regard to the quality standard, and possible sources of error in production can be detected.
- test stand configured according to the invention could thus be used variably with regard to the test pressures to be generated, since the first pressure largely depends on the application of the pressure source 1 and the second pressure depends on the design of the piston 8 or the spring element 18 in the additionally provided storage container 10 .
- other pressurized components such as fuel pumps, valves or pressure relief valves, can also be checked for pressure levels or critical pressure levels occurring during operation on the test benches or test benches configured according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10115924 | 2001-03-30 | ||
DE2001115924 DE10115924A1 (de) | 2001-03-30 | 2001-03-30 | Prüfstand zur Ermittlung von Drücken an druckbeaufschlagten Bauteilen |
PCT/DE2002/001113 WO2002079639A1 (de) | 2001-03-30 | 2002-03-27 | Prüfstand zur ermittlung von drücken an druckbeaufschlagten bauteilen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1377748A1 true EP1377748A1 (de) | 2004-01-07 |
EP1377748B1 EP1377748B1 (de) | 2008-07-02 |
Family
ID=7679776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02737755A Expired - Lifetime EP1377748B1 (de) | 2001-03-30 | 2002-03-27 | Prüfstand zur ermittlung von drücken an druckbeaufschlagten bauteilen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1377748B1 (de) |
CN (1) | CN1289810C (de) |
BR (1) | BR0204682B1 (de) |
DE (2) | DE10115924A1 (de) |
WO (1) | WO2002079639A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK200301534A (da) | 2003-10-20 | 2005-04-21 | Ib Obel Pedersen As | Fremgangsmåde til afprövning af en brændstof-indspröjningsventil til en dieselmotor |
DE102009056289B4 (de) * | 2009-11-30 | 2012-12-20 | Continental Automotive Gmbh | Klassierverfahren eines Injektors, Kalibrierverfahren eines Kennfelds eines Injektors sowie Prüfstandvorrichtung eines Injektors |
CN106948992B (zh) * | 2017-05-24 | 2018-12-07 | 重庆电子工程职业学院 | 一种汽车喷油器性能测试工作台 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3117444A (en) * | 1960-04-27 | 1964-01-14 | Hartridge Ltd Leslie | Injection nozzle tester |
DE3128072A1 (de) * | 1980-11-08 | 1982-06-24 | Robert Bosch Gmbh, 7000 Stuttgart | Pruefstand zum pruefen von einspritzduesen |
DE3315503C1 (de) * | 1983-04-28 | 1984-05-03 | Daimler-Benz Ag, 7000 Stuttgart | Testeinrichtung für Hochdruck-Einspritzventile |
DE19726746C2 (de) * | 1997-06-24 | 1999-05-06 | Wtz Fuer Motoren Und Maschinen | Verfahren zum Messen des Volumenstromes von Einspritzdüsen |
DE19801640C1 (de) * | 1998-01-17 | 1999-04-22 | Wtz Motoren & Maschforsch Gmbh | Prüfvorrichtung für Brennstoffeinspritzventile |
DE19850221C1 (de) * | 1998-10-31 | 2000-05-04 | Mtu Friedrichshafen Gmbh | Verfahren zum Prüfen einer Drosselstelle, insbesondere einer Drosselstelle eines Injektors |
DE19851285C5 (de) * | 1998-11-06 | 2007-02-08 | Siemens Ag | Prüfvorrichtung für ein Kraftstoffeinspritzventil |
-
2001
- 2001-03-30 DE DE2001115924 patent/DE10115924A1/de not_active Ceased
-
2002
- 2002-03-27 DE DE50212438T patent/DE50212438D1/de not_active Expired - Lifetime
- 2002-03-27 BR BRPI0204682-2A patent/BR0204682B1/pt not_active IP Right Cessation
- 2002-03-27 WO PCT/DE2002/001113 patent/WO2002079639A1/de active IP Right Grant
- 2002-03-27 CN CN 02800906 patent/CN1289810C/zh not_active Expired - Fee Related
- 2002-03-27 EP EP02737755A patent/EP1377748B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02079639A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1377748B1 (de) | 2008-07-02 |
CN1289810C (zh) | 2006-12-13 |
BR0204682A (pt) | 2003-06-10 |
CN1460152A (zh) | 2003-12-03 |
BR0204682B1 (pt) | 2011-12-13 |
DE50212438D1 (de) | 2008-08-14 |
DE10115924A1 (de) | 2002-10-24 |
WO2002079639A1 (de) | 2002-10-10 |
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