EP1346151B1 - Dispositif de mesure de la quantite d'injection de systemes d'injection et procede de fabrication dudit dispositif - Google Patents

Dispositif de mesure de la quantite d'injection de systemes d'injection et procede de fabrication dudit dispositif Download PDF

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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
Application number
EP01990298A
Other languages
German (de)
English (en)
Other versions
EP1346151A2 (fr
Inventor
Joachim Unger
Ralf Bindel
Ralf Haas
Dirk Wolf
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
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1346151A2 publication Critical patent/EP1346151A2/fr
Application granted granted Critical
Publication of EP1346151B1 publication Critical patent/EP1346151B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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)

Claims (10)

  1. Dispositif de mesure de la quantité d'injection de systèmes d'injection (16) en particulier pour véhicules automobiles et notamment dans le contrôle de fabrication, à l'aide d'une chambre de mesure (14), d'un dispositif de couplage, par lequel au moins un système d'injection (16) peut être couplé de manière étanche sous pression à la chambre de mesure (14), d'un piston (26) maintenu dans un dispositif de guidage (18) de manière coulissante et qui limite par zone la chambre de mesure (14), et d'un détecteur (50) qui détecte un déplacement du piston (26) lors d'une injection par le système d'injection (16), le piston (26) étant fermé au moins pour l'essentiel et creux dans sa partie intérieure, le piston (26) comprenant un corps de base (30), ouvert sur un côté et comportant une paroi frontale (32) sur l'autre côté orienté vers la chambre de mesure (14),
    caractérisé en ce qu'
    un chapeau du type couvercle (54), formant un bouclier thermique, est fixé sur la paroi frontale (32).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    le corps de base (30) comprend un couvercle (38) fermant l'ouverture, et, de préférence, engagé par pression et/ou soudé sur le corps.
  3. Dispositif selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    le chapeau du type couvercle (54) comprend un matériau réfractaire ayant une mauvaise conduction thermique.
  4. Dispositif de mesure de la quantité d'injection de systèmes d'injection (16) en particulier pour véhicules automobiles et notamment dans le contrôle de fabrication, à l'aide d'une chambre de mesure (14), d'un dispositif de couplage, par lequel au moins un système d'injection (16) peut être couplé de manière étanche sous pression à la chambre de mesure (14), d'un piston (26) maintenu dans un dispositif de guidage (18) de manière coulissante et qui limite par zone la chambre de mesure (14), et d'un détecteur (50) qui détecte un déplacement du piston (26) lors d'une injection par le système d'injection (16),
    caractérisé en ce que
    le piston (26) comprend au moins par zone un alliage d'aluminium et/ou de titane.
  5. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le piston (26) comprend au moins par zone un alliage du type AlMgSi1 ou TiA16V4.
  6. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    au moins la surface latérale du piston (26) orientée vers le dispositif de guidage (18) est traitée pour avoir un frottement et/ou une usure faible, en particulier par l'application d'un revêtement dur ou d'une couche carbonée C.
  7. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le dispositif de guidage (18) comprend au moins par zone un alliage d'aluminium, d'acier et/ou de titane, en particulier du type AlMgSil, 31CrMoV9 ou TiA16V4.
  8. Dispositif selon la revendication 7,
    caractérisé en ce qu'
    au moins le dispositif de guidage (18) est traité au moins par zone pour présenter un frottement et/ou une usure faible, en particulier application d'une couche dure et/ou par nitruration au plasma.
  9. Dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le piston (28) et le dispositif de guidage (18) comportent un alliage d'aluminium, en particulier du type AlMgSil, ou le piston comporte un alliage de titane, en particulier du type TiA16V4, et le dispositif de guidage un alliage d'acier, en particulier 31CrMoV9, ou un alliage au titane en particulier du type TiAl6V4.
  10. Procédé de fabrication d'un dispositif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le piston (26) est fabriqué par tournage, rectification, sous-finition et application d'un revêtement dur ou d'une couche C, et le dispositif de guidage (18) est fabriqué par tournage, rectification, application d'une couche dure ou nitruration au plasma et rodage.
EP01990298A 2000-12-20 2001-12-13 Dispositif de mesure de la quantite d'injection de systemes d'injection et procede de fabrication dudit dispositif Expired - Lifetime EP1346151B1 (fr)

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 (fr) 2000-12-20 2001-12-13 Dispositif de mesure de la quantite d'injection de systemes d'injection et procede de fabrication dudit dispositif

Publications (2)

Publication Number Publication Date
EP1346151A2 EP1346151A2 (fr) 2003-09-24
EP1346151B1 true EP1346151B1 (fr) 2005-04-27

Family

ID=7668077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01990298A Expired - Lifetime EP1346151B1 (fr) 2000-12-20 2001-12-13 Dispositif de mesure de la quantite d'injection de systemes d'injection et procede de fabrication dudit dispositif

Country Status (6)

Country Link
US (1) US20030145648A1 (fr)
EP (1) EP1346151B1 (fr)
JP (1) JP4116438B2 (fr)
CN (1) CN100347436C (fr)
DE (2) DE10063713A1 (fr)
WO (1) WO2002050430A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fr) * 1997-03-01 1999-08-18 LUCAS INDUSTRIES public limited company Dispositif d'essai d'injecteur
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

Also Published As

Publication number Publication date
WO2002050430A3 (fr) 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 (fr) 2003-09-24
DE10063713A1 (de) 2002-07-18
WO2002050430A2 (fr) 2002-06-27

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