EP1346151A2 - 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 herstellungInfo
- Publication number
- EP1346151A2 EP1346151A2 EP01990298A EP01990298A EP1346151A2 EP 1346151 A2 EP1346151 A2 EP 1346151A2 EP 01990298 A EP01990298 A EP 01990298A EP 01990298 A EP01990298 A EP 01990298A EP 1346151 A2 EP1346151 A2 EP 1346151A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- injection
- guide device
- measuring chamber
- alloy
- 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 30
- 239000007924 injection Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 238000005121 nitriding Methods 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- -1 especially 31CrMoV9 Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004381 surface treatment 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
- 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 in particular for motor vehicles and in particular in production testing, with a measuring chamber, a coupling device by means of which at least one injection system can be coupled to the measuring chamber in a pressure-tight manner, a piston which is displaceably held in a guide device and delimits the measuring chamber in some areas, and a sensor which during an injection by the injection system, a displacement of the piston is detected.
- an EMI injection quantity indicator
- This comprises a cylinder on which a piston is guided.
- the wall of the measuring chamber is at least partially formed by the piston.
- the measuring chamber also has an opening to which an injection nozzle of an injection system, for example an injector, can be attached in a pressure-tight manner. If the injector injects fuel or a special test fluid into the measuring chamber, the piston moves, what is detected by a displacement sensor. From the path of the piston, the volume change of the measuring chamber and from this the amount of fuel or test fluid injected can be deduced.
- the known injection quantity indicator has several disadvantages.
- piston vibrations occur, which decay only relatively slowly and therefore make it difficult or even impossible to measure rapidly successive injections.
- the piston moves in the cylinder, there is friction on the walls in contact with one another, so that under certain circumstances. the piston movement does not always reflect the volume actually injected.
- the combination of piston and cylinder is also subject to wear, so that the measurement result and the measurement accuracy can change over the life of the device.
- the object of the present invention is therefore to develop a device of the type mentioned at the outset in such a way that it can work with greater accuracy even over a long service life.
- the stability of the piston is considerably increased by the closed design according to the invention. Due to the hollow construction, the weight is only slightly changed.
- the greater rigidity of the piston according to the invention reduces the deformations during operation of the measuring device, as a result of which the measurement result as a whole is more precise and the wear between the piston jacket and the guide wall of the guide opening in the cylinder is reduced.
- the piston comprises a base body which is open on one side and a cap which closes the opening and which is preferably pressed and / or welded onto the base body.
- a piston constructed in this way can be manufactured relatively inexpensively and yet stably.
- the piston comprises at least on its side facing the measuring chamber a heat-resistant material with poor heat conduction, the deformations during the injection of a usually heated fluid (approx. 80 ° C.) are further reduced.
- the piston comprises a cover-like attachment made of a heat-resistant material which has poor heat conduction.
- a cover-like attachment made of a heat-resistant material which has poor heat conduction.
- Such an attachment serves, so to speak, as a "heat shield" of the structure of the piston protects against the temperature influences of the heated test fluid.
- the stability of the piston can also be improved by a special choice of material. It is proposed according to the invention that the piston comprises an aluminum and / or a titanium alloy at least in some areas. It is particularly preferred that the piston comprises an alloy of the type AlMgSil or T1A16V4 at least in some areas.
- the improvement of measurement accuracy can 'also be carried out in that at least the side facing the guide device surface of the piston is treated so as to friction and / or wear, in particular by hard coating or the application of a C coating. With such surface treatments or coatings, surfaces can be realized which are very smooth on the one hand and therefore only a small one
- the structural measures to increase the measuring accuracy and to extend the service life of the device according to the invention can also be carried out on the part of the guide device.
- the guide device comprises at least in regions an aluminum, a steel or a titanium alloy, in particular AlMgSil, 31CrMoV9 or Ti ⁇ l6V.
- the management device can be treated, at least in some areas, in such a way that it and / or is low-wear, in particular by hard coating and / or plasma nitriding.
- the piston and the guide device comprise an aluminum alloy, in particular AlMgSil.
- the piston can be a titanium alloy, in particular TiA16V4 and the
- Guide device comprise a steel alloy, in particular 31CrMoV9, or likewise 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 are achieved with the device when the piston is rotated, ground, subfinished and hard-coated or C-coated and the
- Guide device is produced by turning, grinding, hard coating or plasma nitriding and honing.
- FIG. 1 An exemplary embodiment of the invention is explained in detail below with reference to the accompanying drawing.
- the single figure shows a longitudinal section through a device for measuring the injection nozzles, in particular for motor vehicles.
- Reference numeral 10 It comprises a measuring chamber 14 formed in a housing 12, to which an injection nozzle 16 is coupled in a pressure-tight manner.
- the housing 12, the measuring chamber 14 and the injection nozzle 16 are only schematic in the figure dd CQ OO
- a blind bore 46 is introduced in the area of the thickening 44.
- a piston rod 48 is fastened in this by a thread, the movement of which is picked up by a displacement sensor 50.
- a cover-like attachment 54 which is made of a heat-resistant and poorly conductive material.
- the attachment 54 the function of which is essentially that of a heat shield, is essentially circular and lies with its underside flat on the end wall 32 of the base body 30.
- the top of the attachment 54 is essentially parallel to the top of the cylinder 18, but in its radial edge region parallel to the top of the end wall 32 of the base body 30.
- the piston 26 is therefore a cylindrical hollow body overall.
- the base body 30 of the piston 26 is made of the aluminum alloy AlMgSil. It is produced by first turning it, then sanding the surface, subfinishing it and finally applying a hard coating.
- the cylinder 18 is also made of the same aluminum alloy, but during manufacture it is first ground after turning and then a hard coating is also applied. Finally, the guide bore 20 of the cylinder 18 is honed.
- the piston 26 can also be produced from a titanium alloy, in particular TiAl6V4, and that instead of hard coating, the outer surface of the base body 30 has a carbon
- the cylinder 18 should be made of a steel alloy, especially 31CrMoV9, or a titanium alloy, for example TiAl6V4, and the guide bore 20 should either be hard-coated or plasma-nitrided. This combination of materials also leads to the desired improvement.
- the heat shield 54 can also be glued onto the end wall 32 of the base body 30 of the piston 26.
- Piston 26 not only has advantages in the operation of the device 10, but also increases the stability of the piston 26 during manufacture, so that the lateral surface of the base body 30 is better, i.e. is editable with higher accuracy.
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)
Abstract
Description
Claims
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 true EP1346151A2 (de) | 2003-09-24 |
| EP1346151B1 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
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0250430A2 * |
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 |
| EP1346151B1 (de) | 2005-04-27 |
| DE10063713A1 (de) | 2002-07-18 |
| WO2002050430A2 (de) | 2002-06-27 |
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