WO2011069717A1 - Système d'injection de carburant avec détermination de la position de l'aiguille - Google Patents

Système d'injection de carburant avec détermination de la position de l'aiguille Download PDF

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Publication number
WO2011069717A1
WO2011069717A1 PCT/EP2010/065323 EP2010065323W WO2011069717A1 WO 2011069717 A1 WO2011069717 A1 WO 2011069717A1 EP 2010065323 W EP2010065323 W EP 2010065323W WO 2011069717 A1 WO2011069717 A1 WO 2011069717A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
force sensor
fuel injection
injection device
nozzle needle
Prior art date
Application number
PCT/EP2010/065323
Other languages
German (de)
English (en)
Inventor
Gernot Wuerfel
Ingo Pietsch
Ingo Kerkamm
Andreas Jakobi
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
Priority to EP10768730A priority Critical patent/EP2510216A1/fr
Priority to US13/514,277 priority patent/US9856842B2/en
Priority to CN201080055651.0A priority patent/CN102656360B/zh
Publication of WO2011069717A1 publication Critical patent/WO2011069717A1/fr

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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing

Definitions

  • the present invention relates to a fuel injection device with a needle position determination for the exact determination of a needle position and in particular a high-precision determination of an injected
  • Nozzle needle position in the nozzle seat due to wear, coking, etc. affects what can not be detected in conventional fuel injectors. Therefore, a measurement and coding is performed for each piezoelectric actuator before installing the piezoelectric actuator. With the help of this information, the respective individual lifting capacity of a single piezoelectric actuator is determined. As a result, a theoretical injection quantity dosing for each piezoelectric actuator can be calculated. However, since each individual piezoelectric actuator must be measured, there is a considerable manufacturing effort. Furthermore, the individual control units for the fuel injection device then also have to individually adapted to the piezoelectric actuator. In addition, even the theoretically determined value can be significantly different from a later actual one
  • Needle flight behavior in the installed state of the piezoelectric actuator deviate. Therefore, there are inaccuracies in the amount of fuel injected. It would therefore be desirable to have a possibility of an exact needle position at each point in the injection process and then calculate a respective injection quantity therefrom.
  • the fuel injection device according to the invention with the features of claim 1 has the advantage over that they by means of a sensor at any time of an injection process, an exact position of a
  • Needle needle can determine (needle flying behavior). Based on the exact position of the nozzle needle can be a precise determination of a
  • Fuel injection amount to be performed As a result, the invention provides a basis for a further increase in efficiency in internal combustion engines, since an extremely accurate determination of an injected
  • Amount of fuel is possible, which is significantly different from the previously known in the art possibilities.
  • a further advantage lies in an extended diagnostic capability of the injector, as mechanical errors, e.g. jamming, and / or wear, e.g. by coking, are detectable.
  • resources in the control unit of the injector are significantly different from the previously known in the art possibilities.
  • Fuel injection device can be saved and there is an improved protection against undesirable tuning of the internal combustion engine possible because the interposition of a tuning control device for
  • the fuel injection device comprises a force sensor for detecting a force applied by an actuator and a control unit.
  • the control unit is connected in the force sensor and designed to be based on the supplied signals of the force sensor
  • the force sensor thus serves to detect the actuator force, which in piezo actuators with a concomitant change in length of the piezoelectric actuator correlated.
  • the force of the magnetic actuator correlates with the movement of the magnetic actuator. Therefore, the idea according to the invention can be used regardless of the type of actuator, in Magnetinjektoren as well as piezoelectric actuators, which is particularly useful due to the great simplification possibilities in piezo actuators.
  • the force sensor is a piezoelectric sensor.
  • the piezoelectric sensor can be constructed in one or more layers.
  • the use of a piezoelectric sensor as a force sensor allows a small overall height and thus a compact construction.
  • the actuator of the fuel injection device is a piezoelectric actuator. This results in addition to the known advantages of
  • the piezo actuators can be installed directly without additional measurement and control units do not need to be individually adapted to the piezo actuators.
  • the force sensor comprises a passage opening, wherein a nozzle needle of the
  • Fuel injection device is passed through the through hole.
  • the force sensor is connected to a return spring for the actuator and detects a restoring force provided by the return spring, which is built up in accordance with the actuator force.
  • the force sensor is arranged in the force flow between the actuator and the nozzle needle.
  • the force sensor can directly absorb an actuator force.
  • the force sensor is designed in disk form in order to have the shortest possible axial length.
  • the force sensor is preferably directly in contact with or integrated into the actuator by preferably using identical piezoceramics for the actuator and the sensor.
  • the present invention can be used with all types of fuel injection valves, but is particularly advantageous in piezo actuators.
  • the present invention makes it possible, especially in the case of piezoelectric actuators, to achieve a further significant reduction in the cost of manufacturing and a more exact metering of the injection quantity, so that a novel basis for a further increase in efficiency and thus fuel savings results.
  • Figure 1 is a schematic sectional view of a
  • FIG. 2 shows a plan view of a force sensor from FIG. 1,
  • Figure 3 is a schematic sectional view of a
  • Figure 4 is a schematic sectional view of a
  • Figure 5 is a schematic sectional view of a
  • Fuel injection device 1 according to a first preferred
  • the fuel injection device 1 comprises a nozzle needle 2, which is connected directly to an actuator 3.
  • a nozzle needle 2 which is connected directly to an actuator 3.
  • the actuator 3 is a multilayer piezoelectric actuator.
  • Nozzle needle 2 is an outwardly opening nozzle needle, which on a
  • Valve seat 10 opens or closes an outlet opening.
  • Fuel injection device 1 further comprises a valve housing 4, a hydraulic coupler 5 and a return spring 7.
  • the return spring 7 serves to return the actuator 3 after completion of an injection process.
  • the fuel injection device 1 comprises a force sensor 6. The force sensor
  • Figure 2 shows a plan view of the force sensor 6, which is designed as an annular disc.
  • the middle of the force sensor 6 comprises a cylindrical
  • an actuator-side end of the nozzle needle 2 is defined by the force sensor 6, more precisely by the
  • the force sensor 6 is arranged between the actuator 3 and the return spring 7, wherein the return spring 7 is supported on the valve housing 4. Thus, a restoring force of the return spring 7 acts on the force sensor 6 in the event of a change in length of the piezoactuator
  • the force sensor 6 is not arranged directly in the power flow between the nozzle needle 2 and the piezoelectric actuator, but is still moved at a change in length of the piezoelectric actuator.
  • a deflection of the actuator 3 has an elongation of the actuator in the direction of
  • Nozzle needle 2 result, so that the return spring 7 is compressed via the force sensor 6.
  • the opposing force of the return spring 7 constructed thereby can be detected by the force sensor 6 as a force signal.
  • the force sensor 6 is provided with a control unit
  • This control unit 11 are those of the force sensor. 6 supplied recorded signals.
  • the control unit 11 is designed so that it can perform a position determination of the needle precisely based on the supplied signals of the force sensor 6. Based on this position determination, the control unit 6 can then inject one
  • an exact injection quantity can then be calculated, wherein an opening cross-section for the ejection of fuel can be determined by means of the needle position.
  • an exact needle position can be determined at any time, so that an exact injection quantity can also be defined over the energization duration of the piezoactuator.
  • actuator coding that is to say the individual measurement of each individual actuator, to be dispensed with during actuator production, which leads to a significant cost reduction, even in the case of the respective control devices.
  • Fuel injection device 1 according to a second embodiment of the invention described in detail. Identical or functionally identical parts are denoted by the same reference numerals as in the preceding embodiment.
  • a position of the force sensor 6 is different. More specifically, the force sensor 6 is arranged in the fuel injection device such that in the axial direction, the return spring 7 between the force sensor
  • FIGS. 4 and 5 show a third and fourth embodiment of the invention, wherein like reference numerals designate technically functionally identical parts.
  • the force sensor 6 is respectively arranged in the force flow between the actuator 3 and the nozzle needle 2.
  • the force sensor 6 is located between the actuator 3 and the nozzle needle 2 and is in direct contact with the return spring 7.
  • the force sensor 6 is designed as a disk without a central passage opening and a deflection of the actuator 3 in turn a compression of the return spring 7 result, which the force sensor 6 can detect, and accordingly outputs a corresponding force signal to the control unit 11.
  • the force sensor 6 can, as described in the third exemplary embodiment, be arranged on the needle-side end of the actuator in FIG. 4 or, as shown in the fourth exemplary embodiment of FIG. 5, on the distal end of the needle, adjacent to the hydraulic coupler 5. It should also be noted that at the third and fourth

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un système d'injection de carburant comprenant une aiguille de gicleur (2), un actionneur (3) servant à actionner l'aiguille de gicleur (2), un capteur dynamométrique (6) pour la saisie d'une force exercée par l'actionneur (3) et une unité de commande (11) reliée au capteur dynamométrique (6), le capteur dynamométrique (6) acheminant des signaux à l'unité de commande (11) et l'unité de commande (11) étant réalisée pour, sur la base du signal acheminé, déterminer la position de l'aiguille du gicleur (2) et déterminer de manière précise une quantité de carburant injectée.
PCT/EP2010/065323 2009-12-08 2010-10-13 Système d'injection de carburant avec détermination de la position de l'aiguille WO2011069717A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10768730A EP2510216A1 (fr) 2009-12-08 2010-10-13 Système d'injection de carburant avec détermination de la position de l'aiguille
US13/514,277 US9856842B2 (en) 2009-12-08 2010-10-13 Fuel injection device having a needle position determination
CN201080055651.0A CN102656360B (zh) 2009-12-08 2010-10-13 具有喷嘴针的位置测定机构的燃料喷射装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009047611.3 2009-12-08
DE102009047611A DE102009047611A1 (de) 2009-12-08 2009-12-08 Kraftstoffeinspritzvorrichtung mit Nadelpositionsbestimmung

Publications (1)

Publication Number Publication Date
WO2011069717A1 true WO2011069717A1 (fr) 2011-06-16

Family

ID=43416238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/065323 WO2011069717A1 (fr) 2009-12-08 2010-10-13 Système d'injection de carburant avec détermination de la position de l'aiguille

Country Status (5)

Country Link
US (1) US9856842B2 (fr)
EP (1) EP2510216A1 (fr)
CN (1) CN102656360B (fr)
DE (1) DE102009047611A1 (fr)
WO (1) WO2011069717A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013206933A1 (de) * 2013-04-17 2014-10-23 Continental Automotive Gmbh Modulare Aktuatoreinheit für ein Einspritzventil

Families Citing this family (11)

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DE102011078953A1 (de) * 2011-04-07 2012-10-11 Robert Bosch Gmbh Kraftstoffinjektor
DE102011082455B4 (de) * 2011-09-09 2014-02-13 Continental Automotive Gmbh Verfahren zum Überwachen einer Einspritzmenge eines Fluids sowie Einspritzsystem zum Einspritzen einer Einspritzmenge eines Fluids
DE102012204272B4 (de) * 2012-03-19 2021-10-28 Vitesco Technologies GmbH Verfahren zum Betreiben eines Kraftstoffeinspritzsystems mit Regelung des Einspritzventils zur Erhöhung der Mengengenauigkeit und Kraftstoffeinspritzsystem
DE102013214960A1 (de) * 2013-07-31 2015-02-05 Robert Bosch Gmbh Brennstoffeinspritzsystem
DE102013219225A1 (de) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo-Injektor zur Kraftstoff-Direkteinspritzung
FR3024183B1 (fr) * 2014-07-22 2019-07-26 Delphi Technologies Ip Limited Injecteur de carburant
FR3031391B1 (fr) * 2015-01-05 2017-07-07 Peugeot Citroen Automobiles Sa Procede et dispositif de detection de presence d’un ressort sur un joint en queue d’une soupape par fibres optiques
DE102015219741B4 (de) * 2015-10-12 2022-08-11 Vitesco Technologies GmbH Präzise Bestimmung der Einspritzmenge von Kraftstoffinjektoren
CN110793425B (zh) * 2019-10-29 2021-08-31 歌尔股份有限公司 一种压电喷胶系统的检测方法和装置
CN112943501B (zh) * 2021-04-28 2022-03-08 一汽解放汽车有限公司 一种油嘴偶件流量测试装置及方法
DE102022209727B4 (de) 2022-09-16 2024-03-28 Vitesco Technologies GmbH Verfahren zum Betreiben eines Kraftstoff-Einspritzsystems eines Verbrennungsmotors

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US4483480A (en) * 1980-02-13 1984-11-20 Nissan Motor Company, Limited Injection valve timing sensor
DE3830510C1 (en) * 1988-09-08 1989-12-14 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Device for determining the rate of injection in internal combustion engines or the like
DE10127932A1 (de) * 2001-06-08 2002-12-19 Bosch Gmbh Robert Ventil zum Steuern von Fluiden sowie Verfahren zur Bestimmung von Drücken
DE10129375A1 (de) * 2001-06-20 2003-01-02 Mtu Friedrichshafen Gmbh Injektor mit Piezo-Aktuator

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US4483480A (en) * 1980-02-13 1984-11-20 Nissan Motor Company, Limited Injection valve timing sensor
GB2092223A (en) * 1980-12-27 1982-08-11 Nissan Motor Fuel Injection System
DE3830510C1 (en) * 1988-09-08 1989-12-14 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Device for determining the rate of injection in internal combustion engines or the like
DE10127932A1 (de) * 2001-06-08 2002-12-19 Bosch Gmbh Robert Ventil zum Steuern von Fluiden sowie Verfahren zur Bestimmung von Drücken
DE10129375A1 (de) * 2001-06-20 2003-01-02 Mtu Friedrichshafen Gmbh Injektor mit Piezo-Aktuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013206933A1 (de) * 2013-04-17 2014-10-23 Continental Automotive Gmbh Modulare Aktuatoreinheit für ein Einspritzventil
US9709186B2 (en) 2013-04-17 2017-07-18 Continental Automotive Gmbh Modular actuator unit for a fuel injection valve

Also Published As

Publication number Publication date
DE102009047611A1 (de) 2011-06-09
CN102656360B (zh) 2016-03-23
EP2510216A1 (fr) 2012-10-17
US20120325935A1 (en) 2012-12-27
US9856842B2 (en) 2018-01-02
CN102656360A (zh) 2012-09-05

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