WO2016071106A1 - Procédé de commande des injecteurs dans un moteur à combustion interne - Google Patents

Procédé de commande des injecteurs dans un moteur à combustion interne Download PDF

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Publication number
WO2016071106A1
WO2016071106A1 PCT/EP2015/074306 EP2015074306W WO2016071106A1 WO 2016071106 A1 WO2016071106 A1 WO 2016071106A1 EP 2015074306 W EP2015074306 W EP 2015074306W WO 2016071106 A1 WO2016071106 A1 WO 2016071106A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
injector
injection
internal combustion
combustion engine
Prior art date
Application number
PCT/EP2015/074306
Other languages
German (de)
English (en)
Inventor
Fabian FISCHER
Stefan Stein
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 WO2016071106A1 publication Critical patent/WO2016071106A1/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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0618—Actual fuel injection timing or delay, e.g. determined from fuel pressure drop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/063—Lift of the valve needle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/04—Fuel pressure pulsation in common rails
    • 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
    • F02D41/3809—Common rail control systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for controlling injectors in an internal combustion engine, in which for the metering of fuel in a
  • the injector is controlled by means of a control signal with a fixed start time and a specified drive time and thus at least one switching valve is opened and closed, via which a control of a nozzle of the injector for metering the fuel.
  • Common rail systems are electronically controllable in their injection quantity and duration independently of the crank angle of an internal combustion engine and also enable pre, main and postinjections of the fuel.
  • solenoid injectors are used to inject the fuel into the combustion chamber of the internal combustion engine. These injectors have u. a. a switching valve and a nozzle needle on.
  • the switching valve (actuator) is supplied with a voltage and / or a current for a defined period of time.
  • the current generates a magnetic field which causes the switching valve to move in a stroke.
  • the pressure relief in the control chamber of the switching valve in combination with the hydraulic design in turn lead to a lifting movement of the nozzle needle.
  • the switching valve closes, the nozzle needle is offset by the increasing pressure in the control chamber in a closing movement.
  • a central control unit is provided, which is also referred to as a motor controller.
  • Engine control generates the time-defined control signals for all injectors of all cylinders of an internal combustion engine.
  • the switching valve and the nozzle needle are coupled together by means of a hydraulic system not described here.
  • Common rail injectors with servo principle have a pressure-dependent injection start delay.
  • the respective preceding injections which cause pressure waves, influence the pressure for the subsequent injection.
  • Quantity error can be corrected with a software (SW) function (QWC: Quantity Wave Correction).
  • SW software
  • QWC Quantity Wave Correction
  • pattern-specific deviations (Ex-Ex scattering) of the injection systems can not be taken into account.
  • quantity errors caused by pattern-specific deviations can not be completely corrected, which can lead to an increase in the quantity error.
  • the device according to the invention with the features of the independent claim 1 has the advantage that a dynamic adjustment of the drive time AD of an injector due to a check of a timing between an actual time of opening a switching valve and the predetermined by the control signal target time for opening the switching valve ,
  • NCS Needle closing sensor
  • This measured valve opening time is compared with a specified starting time for the opening of the switching valve, ie a setpoint, with the designation "t_open_MV_soll”.
  • Valve opening timing deviates from the setpoint, a correction of Actuator AD and / or the start of the drive of the injector, for example, made for the subsequent injection process to reduce the quantity error occurring in this case.
  • an adaptation of the control period AD can already be carried out in the current injection process.
  • a correction of the start of control represents a shift of the starting edge of the control signal driving the injector, for example, with respect to the specified starting time.
  • Injections (hydraulic distance between 50 and 300 is) very well correlated with the opening of the switching valve and so can be concluded from the timing of the switching valve to the injector nozzle / needle.
  • the times are each in one to the other
  • Processing appropriate value such as a digital value transferred. From these values a difference can then be generated by means of an arithmetic logic unit.
  • the result is a difference which is greater than zero.
  • the driving time AD of the subsequent injection is increased.
  • the value of the predetermined valve opening time is greater, this results in a Difference which is less than zero.
  • the drive duration AD of the subsequent injection is reduced.
  • AD_soll_neu AD_soll + factorl * (t_open_MV_measured - t_open_MV_soll) A factor2 are formed.
  • the predetermined setpoint for the Bestromungsende of the injector is dynamically adjusted during operation of the internal combustion engine.
  • Control of injectors are performed in an internal combustion engine.
  • the method for controlling injectors in an internal combustion engine may include, for example as a data processing device, a processor for processing the program code.
  • Program codes the device is equipped with a non-volatile storage means, such as a ROM (Read Only Memory), EPROM (Electrically Programmable Read Only Memory), EEPROM (Electrically Erasable PROMs) or flash EEPROM.
  • ROM Read Only Memory
  • EPROM Electrically Programmable Read Only Memory
  • EEPROM Electrically Erasable PROMs
  • flash EEPROM flash EEPROM.
  • This storage means is for transmitting data, such as a program code, connected to the processor and arranged for example in a motor control.
  • an electronic control unit for example a
  • the figure shows a representation of injection start shifts
  • NCS a sensor for diesel injectors
  • the switching of the actuator (MV) itself can also be monitored, since the valve chamber pressure varies depending on the state of the switching valve, which can be open or closed.
  • Solenoid valve earlier also opens the nozzle needle earlier and vice versa.
  • the time of the injection start ie the opening of the nozzle, can not be measured directly. Since the timing of the valve opening, so switching of the solenoid valve, correlates well with the opening of the nozzle needle at short injection intervals, as shown schematically in the figure, using the timing of the valve opening, the control period AD of the current and / or the subsequent injection in Corrected a precontrol so that not too much or too little amount of fuel is injected.
  • the injection start shift is in a diagram for
  • the drive duration AD of the injector is predetermined by means of a switching signal generated by a motor control. In a deviation of the predetermined valve opening time from the actually realized time of opening the nozzle of the injector, there is no longer the predetermined
  • Driving time AD responsive time of injection of fuel into the combustion chamber of the internal combustion engine.
  • the method according to the invention enables a timely correction of occurring deviations from the desired specification.
  • the following education regulation can be used:
  • AD_soll_neu AD_soll + (t_open_MV_ measured - t_open_MV_soll)
  • the drive time AD remains in the case of
  • T open MV should unchanged.
  • the driving time AD for the injection is adjusted immediately by the driving time AD is increased or decreased.
  • Such an adaptation of the activation duration AD can be carried out both for the current injection and for the subsequent injection.
  • AD_soll_neu AD_soll + factorl * (t_open_MV_ measured - t_open_MV_soll) A factor2
  • Another application of the method is the correction of different valve opening times, for example as a result of
  • the An Kunststoffdauer an injection is based on the operating variables of the injection system, for. B. rail pressure, and calculates the amount of fuel to be injected. Usually, the drive time is before the beginning of the injection system.
  • Injection firmly and can not be changed.
  • the length of the control period of the already started injection can be adapted.
  • the z. B. may be due to hydraulic effects

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)

Abstract

L'invention, laquelle concerne un procédé de commande d'injecteurs dans un moteur à combustion interne, permet une adaptation de la durée de commande AD de l'injecteur par une comparaison de l'instant de démarrage déterminé de l'ouverture de la buse de l'injecteur à un instant mesuré de l'ouverture du clapet de commande, la durée de commande AD de l'injecteur étant modifiée en fonction de la comparaison.
PCT/EP2015/074306 2014-11-05 2015-10-21 Procédé de commande des injecteurs dans un moteur à combustion interne WO2016071106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014222543.4A DE102014222543A1 (de) 2014-11-05 2014-11-05 Verfahren zur Ansteuerung von Injektoren in einer Brennkraftmaschine
DE102014222543.4 2014-11-05

Publications (1)

Publication Number Publication Date
WO2016071106A1 true WO2016071106A1 (fr) 2016-05-12

Family

ID=54337286

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/074306 WO2016071106A1 (fr) 2014-11-05 2015-10-21 Procédé de commande des injecteurs dans un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102014222543A1 (fr)
WO (1) WO2016071106A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018059819A1 (fr) * 2016-09-30 2018-04-05 Robert Bosch Gmbh Amélioration du comportement de démarrage à froid de moteurs à combustion interne

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020152985A1 (en) * 2001-04-20 2002-10-24 Wolff Peter U. System, apparatus including on-board diagnostics, and methods for improving operating efficiency and durability of compression ignition engines
DE10256240A1 (de) * 2002-12-02 2004-06-09 Robert Bosch Gmbh Verfahren zur Steuerung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
EP1443198A2 (fr) * 2003-01-30 2004-08-04 Denso Corporation Système d'injection de carburant
JP2005105947A (ja) * 2003-09-30 2005-04-21 Toyota Motor Corp 内燃機関の燃料噴射制御装置
JP2006258056A (ja) * 2005-03-18 2006-09-28 Toyota Motor Corp 内燃機関の燃料噴射装置
DE102008041659A1 (de) * 2007-08-31 2009-03-05 Denso Corp., Kariya-shi Einspritzsteuervorrichtung einer Verbrennungskraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020152985A1 (en) * 2001-04-20 2002-10-24 Wolff Peter U. System, apparatus including on-board diagnostics, and methods for improving operating efficiency and durability of compression ignition engines
DE10256240A1 (de) * 2002-12-02 2004-06-09 Robert Bosch Gmbh Verfahren zur Steuerung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
EP1443198A2 (fr) * 2003-01-30 2004-08-04 Denso Corporation Système d'injection de carburant
JP2005105947A (ja) * 2003-09-30 2005-04-21 Toyota Motor Corp 内燃機関の燃料噴射制御装置
JP2006258056A (ja) * 2005-03-18 2006-09-28 Toyota Motor Corp 内燃機関の燃料噴射装置
DE102008041659A1 (de) * 2007-08-31 2009-03-05 Denso Corp., Kariya-shi Einspritzsteuervorrichtung einer Verbrennungskraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018059819A1 (fr) * 2016-09-30 2018-04-05 Robert Bosch Gmbh Amélioration du comportement de démarrage à froid de moteurs à combustion interne

Also Published As

Publication number Publication date
DE102014222543A1 (de) 2016-05-12

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