EP1346151B1 - Vorrichtung zum messen der einspritzmenge von einspritzsystemen und verfahren zu deren herstellung - Google Patents
Vorrichtung zum messen der einspritzmenge von einspritzsystemen und verfahren zu deren herstellung Download PDFInfo
- Publication number
- EP1346151B1 EP1346151B1 EP01990298A EP01990298A EP1346151B1 EP 1346151 B1 EP1346151 B1 EP 1346151B1 EP 01990298 A EP01990298 A EP 01990298A EP 01990298 A EP01990298 A EP 01990298A EP 1346151 B1 EP1346151 B1 EP 1346151B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- injection
- measurement chamber
- guide device
- regions
- 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.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 31
- 239000007924 injection Substances 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 15
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 238000005121 nitriding Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000003779 heat-resistant material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000008719 thickening Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/001—Measuring fuel delivery of a fuel injector
-
- 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
- F02M65/002—Measuring fuel delivery of multi-cylinder injection pumps
Definitions
- the present invention initially relates to a device for measuring the injection quantity of injection systems especially for motor vehicles and in particular in the Production test, with a measuring chamber, a Coupling device, through the at least one injection system the measuring chamber is pressure-tight coupled, a piston, the slidably held in a guide device and the measuring chamber partially limited, and a sensor, the at an injection by the injection system a Displacement of the piston detected, the piston at least essentially closed and hollow in its interior.
- Such a device is known from DE 19915266C1 and is known as EMI (injection quantity indicator).
- EMI injection quantity indicator
- This includes a cylinder in which a piston is guided.
- the wall of the Measuring chamber is at least partially through the piston educated.
- the measuring chamber further has an opening to which an injection nozzle of an injection system, for example an injector, pressure-tight attachable. Cum them Injector fuel or a special test fluid in the Measuring chamber, the piston moves, which is one of Displacement sensor is detected. Out of the way of the piston can on the Volume change of the measuring chamber and from there to the injected fuel or educaidmenge closed become.
- the known injection quantity indicator has different Disadvantage. This is especially the case with short but intense ones Injection pulses to oscillations of the piston, which only relatively slowly fade away and therefore a measurement quickly on each other complicating subsequent injections or even impossible do.
- Injection pulses to oscillations of the piston, which only relatively slowly fade away and therefore a measurement quickly on each other complicating subsequent injections or even impossible do.
- the piston movement is not always that actually injected volumes.
- the combination of piston and cylinder is also subject to one Wear, so the measurement result and the measurement accuracy can change over the life of the device.
- EP 0 861 979 A2 discloses an injection quantity indicator known, comprising a hollow volumetric flask, which consists of a tubular base and two aluminum end caps consists, which close the base part.
- the present invention has the object, a device of the type mentioned so on that they with higher accuracy even over a long life can.
- Piston Due to the construction according to the invention, the stability of the Pistons increased significantly. Due to the hollow construction method becomes while the weight changed only slightly. The bigger one Rigidity and heat resistance of the invention Piston reduces the deformation during operation of the Measuring device, making the overall result more accurate and the wear between the piston skirt and the Guide wall of the guide opening in the cylinder is reduced.
- the base body comprises a Opening closing lid, preferably on the Base body is pressed and / or welded.
- a thing built-up piston can be relatively inexpensive and yet stable getting produced.
- lid-like tower a heat-resistant and a comprises poor heat conduction material the deformations in the injection of a customary heated fluid (about 80 ° C) again reduced.
- the stability of the piston can also through a special selection of materials can be improved.
- the piston at least partially an aluminum and / or a titanium alloy includes. It is particularly preferred that the piston at least in certain areas an alloy of the type AlMgSi1 or TiAl6V4 includes.
- the improvement of the measurement accuracy can further by take place that at least that of the guide device facing lateral surface of the piston is treated so that they is friction and / or wear, in particular by a Hard coating or the application of a C coating.
- a Hard coating or the application of a C coating With such surface treatments or coatings realize surfaces that are very smooth on the one hand and therefore have little friction and which Beyond that very hard and thus only a small one Wear subject.
- the structural measures to increase the measuring accuracy and for extending the life of the invention Device may also be on the part of the guide device be performed.
- the Guide device at least partially an aluminum, a steel or a titanium alloy, in particular AlMgSil, 31CrMoV9 or TiAl6V.
- the management device at least be treated in some areas in such a way that they and / or is low in wear, in particular by a Hard coating and / or plasma nitriding.
- the piston and the Guide means an aluminum alloy, in particular AlMgSi1, include.
- the piston can be a Titanium alloy, in particular TiAl6V4 and the Guide means a steel alloy, in particular 31CrMoV9, or also a titanium alloy, in particular TiAl6V4.
- the present invention also relates to a method for Producing a device of the type mentioned above.
- the best measurement results due to low friction and low wear will be with the device then achieved when the piston by turning, grinding, Subfinishing and hard coating or C coating and the Guide device by turning, grinding, hard coating or plasma nitriding and honing.
- the single figure shows a longitudinal section through a device for measuring the injectors in particular for motor vehicles.
- Said device carries in the figure 1 the Reference numeral 10. It comprises one in a housing 12th formed measuring chamber 14, to which an injection nozzle 16 is coupled pressure-tight.
- the housing 12, the measuring chamber 14 and the injection nozzle 16 are only schematically in the figure shown with dash-dotted lines.
- the measuring chamber 14 becomes bounded by a guide cylinder 18, in which it is in the plan view, so seen in Figure 1 from above to a circular cylindrical rotary member is.
- the cylinder 18 has a central guide bore 20. Coaxial to the Guide bore 20 is in the top of the cylinder 18th an annular groove 22 is introduced into which a sealing ring 24th is inserted. By this sealing ring 24, the housing 12 pressure-tightly connected to the cylinder 18.
- a piston 26 held displaceable.
- the piston 26 is up, So the measuring chamber 14 through a spring 28th biased.
- the piston 26 initially comprises a cylindrical base body 30, the upper end wall 32nd slightly arched outwards and in the middle of one Material thickening 34 carries.
- Down is the Base body 30 open, where he at its lower edge a inwardly directed annular collar 36 carries.
- a likewise cylindrical cover 38 is pressed, whose outer diameter corresponds approximately to the inner diameter of the annular collar 36 and on its outer circumferential surface, in the vicinity of its lower end in Figure 1, a collar 40 has.
- the lid 38 may alternatively or additionally be welded. This serves as a stop of the lid 38 to the lower edge of the base body 30.
- the end wall 42 of the lid 38 is executed substantially flat and carries in its center a directed towards the base body 30 thickening 44th
- a blind bore 46 is introduced in the region of the thickening 44.
- a threaded rod only schematically illustrated piston rod 48 is fixed, whose movement is tapped by a displacement sensor 50.
- a central blind bore 52 is present, which serves to attach a lid-like attachment 54, which is made of a heat-resistant and a poor heat conduction material.
- the attachment 54 the function of which is essentially that of a heat shield, is substantially circular and lies flat with its underside on the end wall 32 of the base body 30.
- the top of the cap 54 is substantially parallel to the top of the cylinder 18, in its radial edge region, however, parallel to the top of the end wall 32 of the base body 30th
- the Friction between the piston 26 and the cylinder 18 is minimal.
- the individual elements are also extreme wear-resistant. This will increase the accuracy the measurement of injection quantity increases and the life, in which an accurate measurement is possible, extended. Since the Piston 26 forms a closed hollow body, he has at low mass a very high rigidity. This will be the vibrations of the piston 26 after an injection pulse reduces and deforms, which leads to increased friction between the piston 26 and guide bore 20 in the cylinder 18th can lead, diminished.
- the groove serves as a safeguard against a Damage to the device (10) in the event that not between the injections through the nozzle 16 sufficient test fluid is removed from the measuring chamber 14, So this is not sufficiently "emptied”.
- the piston 26 decreases so far from that the test fluid into this groove and then in a test fluid drain can drain. Inadmissible strong pressure increase in the measuring chamber 14 is thus prevented.
- the piston 26 also made a titanium alloy, in particular TiAl6V4 prepared can be and instead of a hard coating the Lateral surface of the base body 30 a carbon coating can have.
- the Heat shield 54 on the end wall 32 of the base body 30 of the Piston 26 can also be stuck.
- the closed construction of the Piston 26 not only advantages in the operation of the device 10th has, but already in the manufacture of the stability of the Piston 26 increases, so that the lateral surface of the Base body 30 better, i. with higher accuracy, is workable.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Coating By Spraying Or Casting (AREA)
- Fuel-Injection Apparatus (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
In die Außenseite der Stirnwand 42 des Deckels 38 ist im Bereich der Verdickung 44 eine Sackbohrung 46 eingebracht. In dieser ist über ein Gewinde eine nur schematisch dargestellte Kolbenstange 48 befestigt, deren Bewegung durch einen Wegsensor 50 abgegriffen wird. In die Außenseite der Stirnwand 32 des Basiskörpers 30 ist ebenfalls im Bereich der Materialverdickung 34 eine zentrische Sackbohrung 52 vorhanden, welche der Befestigung eines deckelartigen Aufsatzes 54 dient, der aus einem hitzebeständigen und eine schlechte Wärmeleitung aufweisenden Material hergestellt ist. Der Aufsatz 54, dessen Funktion im Wesentlichen die eines Hitzeschildes ist, ist im Wesentlichen kreisförmig und liegt mit seiner Unterseite plan an der Stirnwand 32 des Basiskörpers 30 auf. Die Oberseite des Aufsatzes 54 ist im Wesentlichen parallel zur Oberseite des Zylinders 18, in ihrem radialen Randbereich jedoch parallel zur Oberseite der Stirnwand 32 des Basiskörpers 30.
Claims (10)
- Vorrichtung zum Messen der Einspritzmenge von Einspritzsystemen (16) insbesondere für Kraftfahrzeuge und insbesondere in der Fertigungsprüfung, mit einer Messkammer (14), einer Koppeleinrichtung, durch die mindestens ein Einspritzsystem (16) an die Messkammer (14) druckdicht ankoppelbar ist, einem Kolben (26), der verschieblich in einer Führungseinrichtung (18) gehalten ist und die Messkammer (14) bereichsweise begrenzt, und einem Sensor (50), der bei einer Einspritzung durch das Einspritzsystem (16) eine Verschiebung des Kolbens (26) erfasst, wobei der Kolben (26) mindestens im Wesentlichen geschlossen und in seinem Inneren hohl ist, wobei der Kolben (26) einen Basiskörper (30) umfasst, der auf einer Seite offen ist und auf der anderen Seite, die zur Messkammer (14) hin zeigt, eine Stirnwand (32) aufweist, dadurch gekennzeichnet, dass ein deckelartiger Aufsatz (54) an der Stirnwand (32) befestigt ist, der einen Hitzeschild bildet.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Basiskörper (30) einen die Öffnung verschließenden Deckel (38) umfasst, der vorzugsweise auf ihn aufgepresst und/oder verschweißt ist.
- Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der deckelartige Aufsatz (54) ein hitzebeständiges und eine schlechte Wärmeleitung aufweisendes Material umfasst.
- Vorrichtung zum Messen der Einspritzmenge von Einspritzsystemen (16) insbesondere für Kraftfahrzeuge und insbesondere in der Fertigungsprüfung, mit einer Messkammer (14), einer Koppeleinrichtung, durch die mindestens ein Einspritzsystem (16) an die Messkammer (14) druckdicht ankoppelbar ist, einem Kolben (26), der verschieblich in einer Führungseinrichtung (18) gehalten ist und die Messkammer (14) bereichsweise begrenzt, und einem Sensor (50), der bei einer Einspritzung durch das Einspritzsystem (16) eine Verschiebung des Kolbens (26) erfasst, dadurch gekennzeichnet, dass der Kolben (26) mindestens bereichsweise eine Aluminium- und/oder eine Titanlegierung umfasst.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (26) mindestens bereichsweise eine Legierung vom Typ AlMgSi1 oder TiAl6V4 umfasst.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens die der Führungseinrichtung (18) zugewandte Mantelfläche des Kolbens (26) so behandelt ist, dass sie reibungs- und/oder verschleißarm ist, insbesondere durch eine Hartcoatierung oder das Aufbringen einer C-Beschichtung.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Führungseinrichtung (18) mindestens bereichsweise eine Aluminium-, eine Stahl- oder eine Titanlegierung, insbesondere AlMgSi1, 31CrMoV9 oder TiAl6V4, umfasst.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass mindestens die Führungseinrichtung (18) mindestens bereichsweise so behandelt ist, dass sie reibungs- und/oder verschleißarm ist, insbesondere durch eine Hartcoatierung und/oder eine Plasmanitrierung.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (28) und die Führungseinrichtung (18) eine Aluminiumlegierung, insbesondere AlMgSi1, oder der Kolben eine Titanlegierung, insbesondere TiAl6V4, und die Führungseinrichtung eine Stahllegierung, insbesondere 31CrMoV9, oder eine Titanlegierung, insbesondere TiAl6V4, umfasst.
- Verfahren zum Herstellen einer Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (26) durch Drehen, Schleifen, Subfinieren und Hartcoatieren oder C-Beschichten und die Führungseinrichtung (18) durch Drehen, Schleifen, Hartcoatieren oder Plasmanitrieren und Honen hergestellt wird.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10063713A DE10063713A1 (de) | 2000-12-20 | 2000-12-20 | Vorrichtung zum Messen der Einspritzmenge von Einspritzsystemen und Verfahren zu deren Herstellung |
| DE10063713 | 2000-12-20 | ||
| PCT/DE2001/004695 WO2002050430A2 (de) | 2000-12-20 | 2001-12-13 | Vorrichtung zum messen der einspritzmenge von einspritzsystemen und verfahren zu deren herstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1346151A2 EP1346151A2 (de) | 2003-09-24 |
| EP1346151B1 true EP1346151B1 (de) | 2005-04-27 |
Family
ID=7668077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01990298A Expired - Lifetime EP1346151B1 (de) | 2000-12-20 | 2001-12-13 | Vorrichtung zum messen der einspritzmenge von einspritzsystemen und verfahren zu deren herstellung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20030145648A1 (de) |
| EP (1) | EP1346151B1 (de) |
| JP (1) | JP4116438B2 (de) |
| CN (1) | CN100347436C (de) |
| DE (2) | DE10063713A1 (de) |
| WO (1) | WO2002050430A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10107032A1 (de) * | 2001-02-15 | 2002-08-29 | Bosch Gmbh Robert | Verfahren, Computerprogramm und Vorrichtung zum Messen der Einspritzmenge von Einspritzdüsen, insbesondere für Kraftfahrzeuge |
| DE10309440A1 (de) * | 2003-03-05 | 2004-09-16 | Robert Bosch Gmbh | Verfahren, Vorrichtung und Computerprogramm zum Messen der Leckage von Einspritzsystemen, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen |
| DE102017212003A1 (de) * | 2016-09-16 | 2018-03-22 | Robert Bosch Gmbh | Überströmventil, insbesondere zur Verwendung in einem Kraftstoffeinspritzsystem, Hochdruckpumpe sowie Kraftstoffeinspritzsystem |
| DE102016219486A1 (de) * | 2016-10-07 | 2018-04-12 | Robert Bosch Gmbh | Drosselelement, insbesondere für eine Hochdruckpumpe, insbesondere eines Niederdruckkreis eines Kraftstoffeinspritzsystems |
| DE102021202773A1 (de) | 2021-03-23 | 2022-09-29 | Robert Bosch Gesellschaft mit beschränkter Haftung | Vorrichtung zum Messen der Einspritzmenge von Einspritzsystemen |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852451A (ja) * | 1981-09-24 | 1983-03-28 | Toyota Motor Corp | 耐熱・断熱性軽合金部材およびその製造方法 |
| DE3139831C2 (de) * | 1981-10-07 | 1987-02-05 | Daimler-Benz Ag, 7000 Stuttgart | Meßvorrichtung zum Messen von aufeinanderfolgenden Kraftstoffeinspritzmengen |
| GB8329399D0 (en) * | 1983-11-03 | 1983-12-07 | Churchill V L Ltd | Diesel engine injector tester |
| DE68913201T2 (de) * | 1988-05-03 | 1994-07-28 | Ceram Eng Pty Ltd | Bremseinheit. |
| SE509233C2 (sv) * | 1993-12-30 | 1998-12-21 | Mecman Ab Rexroth | Cylinder med ovridbar kolvstång |
| DE4434597B4 (de) * | 1994-09-28 | 2006-09-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Messung kleiner Kraftstoffeinspritzmengen |
| CN2275166Y (zh) * | 1996-08-29 | 1998-02-25 | 北京铁路局 | 喷油器试验台 |
| EP0861979A3 (de) * | 1997-03-01 | 1999-08-18 | LUCAS INDUSTRIES public limited company | Einspritzventilprüfungsvorrichtung |
| DE19915266C1 (de) * | 1999-04-03 | 2000-05-25 | Daimler Chrysler Ag | Meßvorrichtung zur volumetrischen Messung von Einspritzmengen |
| FR2795173B1 (fr) * | 1999-06-16 | 2001-07-20 | Efs Sa | Dispositif a piston permettant de mesurer de petites quantites de carburant injecte par un injecteur |
-
2000
- 2000-12-20 DE DE10063713A patent/DE10063713A1/de not_active Ceased
-
2001
- 2001-12-13 DE DE50106055T patent/DE50106055D1/de not_active Expired - Lifetime
- 2001-12-13 JP JP2002551291A patent/JP4116438B2/ja not_active Expired - Fee Related
- 2001-12-13 CN CNB018053580A patent/CN100347436C/zh not_active Expired - Fee Related
- 2001-12-13 EP EP01990298A patent/EP1346151B1/de not_active Expired - Lifetime
- 2001-12-13 WO PCT/DE2001/004695 patent/WO2002050430A2/de not_active Ceased
- 2001-12-13 US US10/204,282 patent/US20030145648A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002050430A3 (de) | 2002-08-29 |
| DE50106055D1 (de) | 2005-06-02 |
| JP2004516412A (ja) | 2004-06-03 |
| CN100347436C (zh) | 2007-11-07 |
| JP4116438B2 (ja) | 2008-07-09 |
| US20030145648A1 (en) | 2003-08-07 |
| CN1404552A (zh) | 2003-03-19 |
| EP1346151A2 (de) | 2003-09-24 |
| DE10063713A1 (de) | 2002-07-18 |
| WO2002050430A2 (de) | 2002-06-27 |
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