WO1990006430A1 - Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant - Google Patents

Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant Download PDF

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Publication number
WO1990006430A1
WO1990006430A1 PCT/EP1988/001131 EP8801131W WO9006430A1 WO 1990006430 A1 WO1990006430 A1 WO 1990006430A1 EP 8801131 W EP8801131 W EP 8801131W WO 9006430 A1 WO9006430 A1 WO 9006430A1
Authority
WO
WIPO (PCT)
Prior art keywords
engine
rtiba
injections
injection
hot
Prior art date
Application number
PCT/EP1988/001131
Other languages
English (en)
Inventor
Willi Rosenau
Heinz Schnier
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 EP19890901062 priority Critical patent/EP0398903B1/fr
Priority to DE19883872260 priority patent/DE3872260T2/de
Priority to PCT/EP1988/001131 priority patent/WO1990006430A1/fr
Publication of WO1990006430A1 publication Critical patent/WO1990006430A1/fr

Links

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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor

Definitions

  • the present invention relates to fuel injection systems having acceleration enrichment (BA), of the kind described in the precharacterising clause of claim 1.
  • BA acceleration enrichment
  • FBA acceleration enrichment factor
  • ti t L .FBA. ⁇ F korr + ts (1)
  • t L is a basic injection value proportional to air flow quantity (Q L )
  • FBA is the acceleration enrichment factor
  • ⁇ F k orr is a combination of other correcting factors, well known in the art.
  • ts is a battery voltage correction factor.
  • acceleration enrichment factor is applied to a value of t L (basic load) which is too small, so that the excess quantity required at that instant is therefore not produced.
  • t L basic load
  • RTIBA ignition-synchronous intermediate injection
  • the value of this intermediate injection (RTIBA) is dependent on the prevailing value of the engine temperature ( ⁇ Mot ) so that
  • RTIBA f ( ⁇ Mot )
  • the acceleration enrichment factor (FBA) in this known system is increased once by a preselectable constant y, such that:
  • FBAUE FBA. y
  • RTIBA additional injection pulses
  • a further known system (U.S. 3 673 989) provides, upon detection of an acceleration enrichment
  • the intermediate injections RTIBA achieve an excess quantity of injected fuel.
  • both the excess quantity as well as the break-off criterion, after fulfilment of which only normally calculated T L periods are output, are formed by relatively rough methods in this known technique, which do not adapt the fuel enrichment sufficiently accurately to the acceleration demanded.
  • Fig.1 is a graphical representation of the operation of one known arrangement for achieving acceleration enrichment (BA);
  • Fig.2 is a graphical representation of the
  • Fig.3 is a graphical representation of the
  • initial injection pulses RTIBA are output in synchronism with the ignition pulses # .
  • the lengths of these initial pulses RTIBA are independent of engine load T L but are arranged to be dependent upon "load substitute
  • the load replacement variable RTIBA - f ( ⁇ Mot , n, ULHM, ⁇ ULHM). It will be noted that the latter variables are available at the instant of acceleration enrichment detection.
  • the length of the initial injection pulses is obtained in the simplest way in that the values of tables, which are dependent on ⁇ mot , n, ULHM, AULHM and are filed in the data region of the system, are traced (in part without interpolation) and linked to one another. In this way, long calculations of the load are avoided.
  • the maximum number of initial injection pulses RTIBA determined in this way is freely selectable.
  • the length of the initial injections RTIBA, which are dependent on the motor temperature ⁇ mot , as well as on the "load substitute variables" of the speed n, ULHM, ⁇ ULHM, can be determined very quickly by accessing the table. Thus, such initial injections can be provided for the next X 180° crankshaft rotations or X 360° crankshaft rotations (X being freely selectable).
  • crankshaft angle in the normal manner in accordance with equation (1), i.e.:
  • ti norm t L .FBA. ⁇ F korr + ts
  • ⁇ /F korr is a mathematical expression for the product of all other correction factors.
  • the first X acceleration enrichment output values are clearly defined and applicable virtually immediately. They are not dependent on load t L , but on "load substitute variables", which are available more rapidly.
  • RTIBA initial injections
  • RTIBA f (ULHM, ⁇ Mot )
  • RTIBA (ULHM).a for ⁇ Mot > ⁇ threShold

Abstract

Après la détection d'une condition d'enrichissement à l'accélération dans un système d'injection de carburant du type ayant un détecteur de quantité d'air à fil chaud, plusieurs injections d'enrichissement initiales (RTIBA) remplacent les injections normales (ti) fondées sur la charge du moteur. Ces injections initiales sont appliquées pour les X prochaines rotations de 180° ou de 360° du vilebrequin et sont d'une durée qui est indépendante de la charge du moteur (TL) mais qui dépend de certaines variables du moteur (telles que la vitesse du moteur (n), la tension du fil chaud ULHM et la variation de la tension du fil chaud ΔULHM) lesquelles sont disponibles au moment de la détection du besoin d'enrichissement d'accélération. Une fois terminées les X rotations de 180° ou de 360° du vilebrequin ou si la période d'injection normalement calculée (ti) fondée sur la charge du moteur a dépassé la durée des injections initiales (RTIBA), alors la valeur normalement calculée (ti) est à nouveau adoptée. La durée de l'injection initiale ou les durées des injections initiales (RTIBA), qui dépendent de la température du moteur ainsi que des variables de substitution de la charge que sont la vitesse (n), la tension du fil chaud ULHM et la variation du fil chaud ΔULHM, sont déterminées à partir de tables de consultation gardées en mémoire.
PCT/EP1988/001131 1988-12-09 1988-12-09 Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant WO1990006430A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19890901062 EP0398903B1 (fr) 1988-12-09 1988-12-09 Procede d'enrichissement a l'acceleration dans des systemes d'injection de carburant
DE19883872260 DE3872260T2 (de) 1988-12-09 1988-12-09 Verfahren zur beschleunigungsanreicherung bei kraftstoffeinspritzsystemen.
PCT/EP1988/001131 WO1990006430A1 (fr) 1988-12-09 1988-12-09 Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1988/001131 WO1990006430A1 (fr) 1988-12-09 1988-12-09 Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant

Publications (1)

Publication Number Publication Date
WO1990006430A1 true WO1990006430A1 (fr) 1990-06-14

Family

ID=8165350

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/001131 WO1990006430A1 (fr) 1988-12-09 1988-12-09 Procede d'enrichissement a l'acceleration dans des sytemes d'injection de carburant

Country Status (3)

Country Link
EP (1) EP0398903B1 (fr)
DE (1) DE3872260T2 (fr)
WO (1) WO1990006430A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309798A (en) * 1996-02-01 1997-08-06 Ford Motor Co Fuel metering system
US5762904A (en) * 1993-07-23 1998-06-09 Massachusetts Institute Of Technology Oral delivery of vaccines using polymerized liposomes
US6004534A (en) * 1993-07-23 1999-12-21 Massachusetts Institute Of Technology Targeted polymerized liposomes for improved drug delivery
US6060082A (en) * 1997-04-18 2000-05-09 Massachusetts Institute Of Technology Polymerized liposomes targeted to M cells and useful for oral or mucosal drug delivery
US6235313B1 (en) 1992-04-24 2001-05-22 Brown University Research Foundation Bioadhesive microspheres and their use as drug delivery and imaging systems
US8906381B2 (en) 2008-10-12 2014-12-09 Massachusetts Institute Of Technology Immunonanotherapeutics that provide IGG humoral response without T-cell antigen
US8932595B2 (en) 2008-10-12 2015-01-13 Massachusetts Institute Of Technology Nicotine immunonanotherapeutics
US9217129B2 (en) 2007-02-09 2015-12-22 Massachusetts Institute Of Technology Oscillating cell culture bioreactor
US9267937B2 (en) 2005-12-15 2016-02-23 Massachusetts Institute Of Technology System for screening particles
US9333179B2 (en) 2007-04-04 2016-05-10 Massachusetts Institute Of Technology Amphiphilic compound assisted nanoparticles for targeted delivery
US9381477B2 (en) 2006-06-23 2016-07-05 Massachusetts Institute Of Technology Microfluidic synthesis of organic nanoparticles
US9474717B2 (en) 2007-10-12 2016-10-25 Massachusetts Institute Of Technology Vaccine nanotechnology
US9492400B2 (en) 2004-11-04 2016-11-15 Massachusetts Institute Of Technology Coated controlled release polymer particles as efficient oral delivery vehicles for biopharmaceuticals

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582037A (en) * 1983-11-11 1986-04-15 Nec Corporation Fuel supply adjusting system capable of quickly responding to a commanded engine speed
EP0258864A1 (fr) * 1986-09-01 1988-03-09 Hitachi, Ltd. Méthode et dispositif de commande de carburant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582037A (en) * 1983-11-11 1986-04-15 Nec Corporation Fuel supply adjusting system capable of quickly responding to a commanded engine speed
EP0258864A1 (fr) * 1986-09-01 1988-03-09 Hitachi, Ltd. Méthode et dispositif de commande de carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 272, (M-425); & JP,A,60 116 835 (HITACHI SEISAKUSHO K.K.) 24-06-1985. *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6235313B1 (en) 1992-04-24 2001-05-22 Brown University Research Foundation Bioadhesive microspheres and their use as drug delivery and imaging systems
US6365187B2 (en) 1992-04-24 2002-04-02 Brown University Research Foundation Bioadhesive microspheres and their use as drug delivery and imaging systems
US5762904A (en) * 1993-07-23 1998-06-09 Massachusetts Institute Of Technology Oral delivery of vaccines using polymerized liposomes
US6004534A (en) * 1993-07-23 1999-12-21 Massachusetts Institute Of Technology Targeted polymerized liposomes for improved drug delivery
GB2309798A (en) * 1996-02-01 1997-08-06 Ford Motor Co Fuel metering system
US6060082A (en) * 1997-04-18 2000-05-09 Massachusetts Institute Of Technology Polymerized liposomes targeted to M cells and useful for oral or mucosal drug delivery
US6387397B1 (en) 1997-04-18 2002-05-14 Massachusetts Institute Of Technology Polymerized liposomes targeted to M cells and useful for oral or mucosal drug delivery
US9492400B2 (en) 2004-11-04 2016-11-15 Massachusetts Institute Of Technology Coated controlled release polymer particles as efficient oral delivery vehicles for biopharmaceuticals
US9267937B2 (en) 2005-12-15 2016-02-23 Massachusetts Institute Of Technology System for screening particles
US9381477B2 (en) 2006-06-23 2016-07-05 Massachusetts Institute Of Technology Microfluidic synthesis of organic nanoparticles
US9217129B2 (en) 2007-02-09 2015-12-22 Massachusetts Institute Of Technology Oscillating cell culture bioreactor
US9333179B2 (en) 2007-04-04 2016-05-10 Massachusetts Institute Of Technology Amphiphilic compound assisted nanoparticles for targeted delivery
US9474717B2 (en) 2007-10-12 2016-10-25 Massachusetts Institute Of Technology Vaccine nanotechnology
US9526702B2 (en) 2007-10-12 2016-12-27 Massachusetts Institute Of Technology Vaccine nanotechnology
US9539210B2 (en) 2007-10-12 2017-01-10 Massachusetts Institute Of Technology Vaccine nanotechnology
US10736848B2 (en) 2007-10-12 2020-08-11 Massachusetts Institute Of Technology Vaccine nanotechnology
US11547667B2 (en) 2007-10-12 2023-01-10 Massachusetts Institute Of Technology Vaccine nanotechnology
US8932595B2 (en) 2008-10-12 2015-01-13 Massachusetts Institute Of Technology Nicotine immunonanotherapeutics
US8906381B2 (en) 2008-10-12 2014-12-09 Massachusetts Institute Of Technology Immunonanotherapeutics that provide IGG humoral response without T-cell antigen

Also Published As

Publication number Publication date
EP0398903B1 (fr) 1992-06-17
DE3872260T2 (de) 1992-12-24
EP0398903A1 (fr) 1990-11-28
DE3872260D1 (de) 1992-07-23

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