WO1999043940A1 - Module d'injection multi-points pour moteur a combustion interne - Google Patents
Module d'injection multi-points pour moteur a combustion interne Download PDFInfo
- Publication number
- WO1999043940A1 WO1999043940A1 PCT/FR1999/000412 FR9900412W WO9943940A1 WO 1999043940 A1 WO1999043940 A1 WO 1999043940A1 FR 9900412 W FR9900412 W FR 9900412W WO 9943940 A1 WO9943940 A1 WO 9943940A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- function
- injection
- injectors
- module
- module according
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- 230000006870 function Effects 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000012937 correction Methods 0.000 description 10
- 239000000446 fuel Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2432—Methods of calibration
- F02D41/2435—Methods of calibration characterised by the writing medium, e.g. bar code
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
Definitions
- the invention relates to electronically controlled multi-point injection devices for an internal combustion engine and more particularly to an injection module belonging to such a device and comprising a ramp intended to be connected to a supply pump and more several injectors connected to the ramp and each provided with electrically controlled opening and closing means.
- the injectors are manufactured to meet a nominal characteristic that is desired to be linear.
- Figure 1 shows in thick lines a nominal characteristic that can be considered representative.
- the quantity injected, at a constant pressure difference between the supply and the combustion chamber, is a substantially linear function of the opening time. In practice, manufacturing tolerances cause dispersions, especially for short injection times.
- the fine line curve in Figure 1 shows an example of a real characteristic.
- the injectors must have a characteristic whose deviation from the setpoint characteristic does not exceed a determined percentage, for example +/- 5%. To fulfill this condition, each injector manufactured is subjected to bench tests and, by trial and error, the preload of the closing spring is sought which makes it possible to get as close as possible to the set characteristic. These are long operations which only allow to compensate for limited deviations, since we act globally on the characteristic.
- the present invention aims to provide an injection module making it possible to tolerate relatively large dispersions of the characteristics of the injectors.
- the invention proposes in particular an injection module comprising means for storing a calibration function of each of the injectors and providing said function in a form usable by a calculation unit controlling the duration of the electrical opening command of the injectors.
- the function to be memorized is determined automatically, by reading the quantities injected for a given number of determined opening times distributed over the operating dynamics. This function can then be stored in the form of a polynomial of sufficient degree or in cartographic form.
- the injection of fuel into a chamber is carried out under a differential pressure which varies according to the operating parameters of the engine.
- This situation can be taken into account by using a cartographic model with two inputs (injection time and differential pressure) or by using a polynomial with two variables. Since the calibration can be carried out automatically, the only manual operations being the installation of the injector and its removal, it is possible to accept a very large number of measurement points, with durations of injection can vary within a very wide range, for example from 0.15 ms up to 10 ms. The main variable being the duration of injection, it will suffice to carry out tests for 2 or 3 different differential pressures, on an automatic test bench.
- the memorized model must accompany the injector and be taken into account in its order by the calculation unit.
- the model is stored in a complete module comprising the injection manifold and the injectors which are permanently attached to it, for example, in a read only memory.
- the module can then be provided with a connector for connection with the calculation unit and with the power amplifier which is controlled by this calculation unit and opens the injectors.
- the connector is provided with a contact or contacts making it possible to copy models representative of the correction with respect to the nominal characteristic, with a view to copying in the calculating member.
- the latter can then be programmed to take into account the corrections over each nominal actuation duration, to take account of the real characteristic of each injector.
- the module will generally also include a pressure sensor providing an electrical output signal representative of the injection pressure prevailing in the boom.
- the calculation unit is connected to this sensor and also to a sensor giving the pressure at the intake of the combustion chambers, representative of the pressure which prevails in these chambers during injection.
- the calculation unit can then take into account not only the model representative of the real characteristic as a function of the nominal injection duration, but also the corrections to be made as a function of the differential injection pressure.
- the pressure sensors will generally be piezoresistive sensors, which have the robustness required to have a long service life under the operating conditions of an internal combustion engine. The above characteristics as well as others will appear better on reading the following description of a particular embodiment of the invention, given by way of nonlimiting example.
- FIG. 1 shows an example of variation of the quantity of fuel injected as a function of the duration of injection.
- FIG. 2 shows an example of correction ⁇ t to be performed over the injection duration as a function of the injection time, for several differential pressures p;
- Figure 3 is a perspective view of a module for implementing the invention;
- Figure 4 is a block diagram showing hardware and software components involved in the implementation artwork .
- FIG. 2 shows three functions corresponding to three different values of the differential pressure.
- These calibration functions can be stored in digital form in several different ways.
- a first solution consists in sampling each of the curves, possibly after smoothing, and in memorizing the sampled points for each of the three differential pressures. This gives a cartographic memory. It can be used either by making a correction corresponding to the nearest stored point, or by bilinear interpolation. The complexity of this latter solution, however, makes it unattractive because the corrections made are always relatively small.
- the curves can also be stored in the form of a polynomial with two variables, which gives better continuity than a cartographic memory, or of several polynomials as a function of time corresponding to several differential pressures.
- the module shown diagrammatically in FIG. 3 comprises an injection ramp 10 to which four electrically controlled injectors 12 are connected.
- the rail is provided with a fuel supply connector 14, connected to a high pressure pump, possibly by a regulator.
- Each injector is provided with an electrical connector 16 for connection to conductors contained in a strip 18 provided with a terminal electrical connector 20.
- the module has a non-volatile memory in which the calibration function is loaded. In general, this memory will only be accessible in read mode from a contact of connector 20. However, it is possible to provide a memory that can be rewritten for recalibration after using the module.
- the content of the module memory is provided to be transferred to the memory of an engine control computer at the end of the vehicle integration line. In an alternative embodiment, the module can simply be accompanied by a memory whose content is transferred to the computer at the end of the integration line.
- the module is completed by a pressure sensor, for example piezoelectric, which can be connected to a nozzle 22.
- a second sensor (not shown) is then provided to determine the pressure in the combustion chambers.
- the essential components which are involved in the implementation of the invention are indicated in FIG. 4.
- the functions in the dashed line frame s24 will generally be fulfilled by the engine control computer, into which the function stored in memory 26 is transferred. that accompanies the module.
- the computer 24 can be viewed as having a block 27 for managing the fuel supply to the engine, which receives the operating parameters, such as the position ⁇ of the accelerator pedal, the speed N, the temperature ⁇ , etc. ...
- the block 27 can in particular develop a setpoint pressure PO of the fuel (dashed arrow in FIG. 4).
- this setpoint pressure PO can equally well be produced by a separate element 28, depending for example on the pressure in the combustion chambers at the start of the exhaust.
- the pressure in the ramp 10 is measured by a sensor 30.
- An error term is generated in an adder 32 and supplied to a regulator 34 supplying the ramp 12.
- Block 27 provides a quantity q setpoint to be injected into a correction block 28 in which the calibration function, which may be the actual law of variation, is loaded.
- the block 28 shown receives an output signal from the sensor 30 on an input 34.
- the correction as a function of the pressure can be carried out in this block or in an additional block 36 which receives the output of a pressure sensor in the combustion.
- the pressure in the ramp can be applied to an input 38 in the event that the corrections as a function of the duration and as a function of the differential pressure are carried out in cascade.
- the corrected duration signal is applied to a power circuit 40 for controlling the injectors 12.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9904895-7A BR9904895A (pt) | 1998-02-26 | 1999-02-24 | Módulo de injeção multipontos para motor à combustão interna |
DE69906642T DE69906642T2 (de) | 1998-02-26 | 1999-02-24 | Mehrpunkteinspritzungseinheit für verbrennungsmotor |
EP99904943A EP0979350B1 (fr) | 1998-02-26 | 1999-02-24 | Module d'injection multi-points pour moteur a combustion interne |
US09/403,415 US6247451B1 (en) | 1998-02-26 | 1999-02-24 | Internal combustion engine multipoint injection module |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9802345A FR2775318B1 (fr) | 1998-02-26 | 1998-02-26 | Module d'injection multi-points pour moteur a combustion interne |
FR98/02345 | 1998-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999043940A1 true WO1999043940A1 (fr) | 1999-09-02 |
Family
ID=9523405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/000412 WO1999043940A1 (fr) | 1998-02-26 | 1999-02-24 | Module d'injection multi-points pour moteur a combustion interne |
Country Status (6)
Country | Link |
---|---|
US (1) | US6247451B1 (fr) |
EP (1) | EP0979350B1 (fr) |
BR (1) | BR9904895A (fr) |
DE (1) | DE69906642T2 (fr) |
FR (1) | FR2775318B1 (fr) |
WO (1) | WO1999043940A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10005208A1 (de) * | 2000-02-05 | 2001-08-16 | Bosch Gmbh Robert | Verfahren zur Adaption des maximalen Einspritzdrucks in einem Hochdruckspeicher |
WO2001083972A1 (fr) * | 2000-05-04 | 2001-11-08 | Bombardier Motor Corporation Of America | Procede et systeme d'installation de coefficients d'injecteurs de carburant |
WO2002044543A3 (fr) * | 2000-11-28 | 2002-08-22 | Bombardier Motor Corp Of Us | Procede et dispositif d'identification des parametres d'un moteur pour l'assemblage et la programmation |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3487207B2 (ja) * | 1999-02-01 | 2004-01-13 | 株式会社デンソー | 燃料噴射システム |
US6536268B1 (en) * | 1999-11-01 | 2003-03-25 | Siemens Vdo Automotive Corporation | Utilizing increasing width for identification voltages |
DE60007836T2 (de) * | 2000-04-01 | 2004-12-16 | Robert Bosch Gmbh | Ausgleich der Spieltoleranzen in verschieden Losen wegen der Schwankungen der Schichtdicke oder der Zahl der Schichten in mehrschichtigen piezoelektrischen Elementen |
JP3941853B2 (ja) * | 2000-12-04 | 2007-07-04 | 愛三工業株式会社 | 燃料噴射制御装置 |
EP1379769A1 (fr) | 2001-04-10 | 2004-01-14 | Robert Bosch Gmbh | Systeme et procede pour corriger les caracteristiques d'injection d'au moins un injecteur |
DE10140151A1 (de) * | 2001-08-16 | 2003-02-27 | Bosch Gmbh Robert | Verfahren zur Beeinflussung der Schadstoffemissionswerte und/oder der Geräuschemissionswerte eines Verbrennungsmotors und Kraftstoff-Einspritzanlage |
US6561164B1 (en) * | 2001-10-29 | 2003-05-13 | International Engine Intellectual Property Company, Llc | System and method for calibrating fuel injectors in an engine control system that calculates injection duration by mathematical formula |
JP4430281B2 (ja) * | 2002-04-23 | 2010-03-10 | トヨタ自動車株式会社 | データマップ作成方法、データマップ作成用情報記録媒体作成方法及び装置 |
DE10240837A1 (de) * | 2002-09-04 | 2004-03-18 | Robert Bosch Gmbh | Anordnung und Verfahren zur Steuerung des Einspritzverhaltens eines Injektors und Verfahren zur Einordnung eines elektrisch angesteuerten Injektors |
US7040149B2 (en) * | 2003-10-24 | 2006-05-09 | Senx Technology, Llc | Fuel injection system diagnostic system |
US7000461B2 (en) * | 2004-03-23 | 2006-02-21 | Honeywell International Inc. | Patch wireless test fixture |
JP4605038B2 (ja) * | 2006-02-02 | 2011-01-05 | 株式会社デンソー | 燃料噴射装置 |
DE102007024823B4 (de) * | 2007-05-29 | 2014-10-23 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Bestimmung eines Ansteuerparameters für einen Kraftstoffinjektor einer Brennkraftmaschine |
DE102007042994A1 (de) * | 2007-09-10 | 2009-03-12 | Robert Bosch Gmbh | Verfahren zum Beurteilen einer Funktionsweise eines Einspritzventils bei Anlegen einer Ansteuerspannung und entsprechende Auswertevorrichtung |
DE102012210739B4 (de) | 2012-06-25 | 2022-02-10 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Ermittlung von Korrekturwerten zur Ansteuerung eines Kraftstoffeinspritzventils |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4895124A (en) * | 1987-12-02 | 1990-01-23 | Proprietary Technology, Inc. | Fuel and electrical distribution system for fuel injected engines |
EP0487198A1 (fr) * | 1990-11-19 | 1992-05-27 | Ford Motor Company Limited | Conduite de carburant et injecteurs intégrés et méthode de fabrication |
EP0488362A2 (fr) * | 1990-11-30 | 1992-06-03 | Toyota Jidosha Kabushiki Kaisha | Dispositif d'injection de carburant pour moteurs à combustion interne |
WO1992009957A1 (fr) * | 1990-11-30 | 1992-06-11 | Weber, U.S.A., Inc. | Dispositif de commande electronique de moteurs, presentant des parametres pouvant etre modifies par l'utilisateur |
EP0512357A2 (fr) * | 1991-05-03 | 1992-11-11 | Cooper Industries Italia S.p.A. | Bobine d'allumage placée sur le haut d'une bougie pour un moteur à combustion interne |
JPH07238857A (ja) * | 1994-02-25 | 1995-09-12 | Hino Motors Ltd | 燃料噴射装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US4402294A (en) * | 1982-01-28 | 1983-09-06 | General Motors Corporation | Fuel injection system having fuel injector calibration |
US5157967A (en) * | 1991-07-31 | 1992-10-27 | Siemens Automotive L.P. | Dynamic flow calibration of a fuel injector by selective positioning of its solenoid coil |
US5663881A (en) * | 1991-08-06 | 1997-09-02 | Siemens Automotive L.P. | Electronic calibrated fuel rail |
US5295627A (en) * | 1993-08-19 | 1994-03-22 | General Motors Corporation | Fuel injector stroke calibration through dissolving shim |
US5920004A (en) * | 1997-05-13 | 1999-07-06 | Caterpillar Inc. | Method of calibrating an injector driver system |
US5839420A (en) * | 1997-06-04 | 1998-11-24 | Detroit Diesel Corporation | System and method of compensating for injector variability |
-
1998
- 1998-02-26 FR FR9802345A patent/FR2775318B1/fr not_active Expired - Fee Related
-
1999
- 1999-02-24 US US09/403,415 patent/US6247451B1/en not_active Expired - Lifetime
- 1999-02-24 WO PCT/FR1999/000412 patent/WO1999043940A1/fr active IP Right Grant
- 1999-02-24 BR BR9904895-7A patent/BR9904895A/pt not_active IP Right Cessation
- 1999-02-24 EP EP99904943A patent/EP0979350B1/fr not_active Expired - Lifetime
- 1999-02-24 DE DE69906642T patent/DE69906642T2/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4895124A (en) * | 1987-12-02 | 1990-01-23 | Proprietary Technology, Inc. | Fuel and electrical distribution system for fuel injected engines |
EP0487198A1 (fr) * | 1990-11-19 | 1992-05-27 | Ford Motor Company Limited | Conduite de carburant et injecteurs intégrés et méthode de fabrication |
EP0488362A2 (fr) * | 1990-11-30 | 1992-06-03 | Toyota Jidosha Kabushiki Kaisha | Dispositif d'injection de carburant pour moteurs à combustion interne |
WO1992009957A1 (fr) * | 1990-11-30 | 1992-06-11 | Weber, U.S.A., Inc. | Dispositif de commande electronique de moteurs, presentant des parametres pouvant etre modifies par l'utilisateur |
EP0512357A2 (fr) * | 1991-05-03 | 1992-11-11 | Cooper Industries Italia S.p.A. | Bobine d'allumage placée sur le haut d'une bougie pour un moteur à combustion interne |
JPH07238857A (ja) * | 1994-02-25 | 1995-09-12 | Hino Motors Ltd | 燃料噴射装置 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 096, no. 001 31 January 1996 (1996-01-31) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10005208A1 (de) * | 2000-02-05 | 2001-08-16 | Bosch Gmbh Robert | Verfahren zur Adaption des maximalen Einspritzdrucks in einem Hochdruckspeicher |
WO2001083972A1 (fr) * | 2000-05-04 | 2001-11-08 | Bombardier Motor Corporation Of America | Procede et systeme d'installation de coefficients d'injecteurs de carburant |
WO2002044543A3 (fr) * | 2000-11-28 | 2002-08-22 | Bombardier Motor Corp Of Us | Procede et dispositif d'identification des parametres d'un moteur pour l'assemblage et la programmation |
US6671611B1 (en) | 2000-11-28 | 2003-12-30 | Bombardier Motor Corporation Of America | Method and apparatus for identifying parameters of an engine component for assembly and programming |
US7136743B2 (en) | 2000-11-28 | 2006-11-14 | Brp Us Inc. | Method and apparatus for identifying parameters of an engine component for assembly and programming |
Also Published As
Publication number | Publication date |
---|---|
FR2775318B1 (fr) | 2000-04-28 |
DE69906642T2 (de) | 2004-03-04 |
DE69906642D1 (de) | 2003-05-15 |
BR9904895A (pt) | 2000-07-04 |
EP0979350B1 (fr) | 2003-04-09 |
EP0979350A1 (fr) | 2000-02-16 |
US6247451B1 (en) | 2001-06-19 |
FR2775318A1 (fr) | 1999-08-27 |
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