EP0930426A2 - Méthode pour prédéterminer la référence de pression d'un système d'injection de carburant avec accumulateur - Google Patents

Méthode pour prédéterminer la référence de pression d'un système d'injection de carburant avec accumulateur Download PDF

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Publication number
EP0930426A2
EP0930426A2 EP98124810A EP98124810A EP0930426A2 EP 0930426 A2 EP0930426 A2 EP 0930426A2 EP 98124810 A EP98124810 A EP 98124810A EP 98124810 A EP98124810 A EP 98124810A EP 0930426 A2 EP0930426 A2 EP 0930426A2
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EP
European Patent Office
Prior art keywords
fup
injection pressure
output
engine
pressure
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.)
Granted
Application number
EP98124810A
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German (de)
English (en)
Other versions
EP0930426A3 (fr
EP0930426B1 (fr
Inventor
Andreas Hartke
Christian Dr. Birkner
Klaus Dr. Wenzlawski
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0930426A2 publication Critical patent/EP0930426A2/fr
Publication of EP0930426A3 publication Critical patent/EP0930426A3/fr
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Publication of EP0930426B1 publication Critical patent/EP0930426B1/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
    • 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
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables
    • 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
    • F02D41/3836—Controlling the fuel pressure
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • 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
    • F02D2200/0602—Fuel pressure
    • 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
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/606—Driving style, e.g. sporty or economic driving
    • 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
    • F02D2250/31—Control of the fuel pressure
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
    • F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position

Definitions

  • the invention relates to a method for specifying the injection pressure setpoint for memory injection systems Fuel supply in internal combustion engines.
  • injection systems are increasingly used, where with very high injection pressures.
  • Such injection systems are common rail injection systems (for diesel engines) and HPDI injection systems (for gasoline engines).
  • HPDI injection systems for gasoline engines.
  • These injection systems are characterized in that the fuel with a high pressure pump in all cylinders shared pressure accumulator is promoted from the injectors or injectors on the individual cylinders of the engine.
  • the opening and closing of the Injectors are usually controlled electromagnetically.
  • the amount of fuel injected is proportional to Injection valve opening time and system or injection pressure, measured by a pressure sensor on the pressure accumulator becomes.
  • the injection pressure is based on the engine speed independent and therefore represents an additional variable represents a need-based injection of the fuel enables.
  • the injection pressure is over the dependent fuel atomization a considerable Influence on the combustion process in the cylinder.
  • the object of the invention is to provide a method for specifying Injection pressure setpoint for accumulator injection systems create that from a transient engine operating condition resulting special requirements on the temporal Course of this size are involved.
  • the Injection pressure setpoint depending on the operating point with the help of separate maps for the engine operating states start, Idle and load.
  • a first timer is also used, the timing of which depends on the engine speed, the course the injection pressure setpoint to the special requirements adapted to the transient engine operation.
  • the timing of which depends on the engine speed, the course the injection pressure setpoint to the special requirements adapted to the transient engine operation.
  • the injection pressure when accelerating from a low engine speed out the injection pressure briefly to be raised in order to improve the mixture preparation at low engine speeds by increasing the injection pressure and therefore better fuel atomization too compensate.
  • a short-term lowering the injection pressure in the event of a sudden load request Reduce noise emissions at high engine speeds.
  • the second timer can also be used to Impose a change limit on the injection pressure during load operation. This depends on the gear selected or the Driving style of the driver the time behavior of the transfer function of the timing element specified accordingly. In this way can the driving behavior of the vehicle driver or a special Situation are taken into account and the usual as a compromise on fuel economy, the Torque development, pollutant emissions and noise behavior engine tuning made in the direction of a certain effect, such as maximum torque development, be moved.
  • the invention thus enables an operating point-dependent Change the injection pressure in real time and thus the optimal one Adaptation of the injection pressure curve to the special one Requirements of transient engine operation.
  • FIG. 1 schematically shows the structure of a fuel injection system, like it is called the common rail system is mainly used in diesel engines.
  • the Fuel is supplied from a fuel tank by a pre-feed pump 10 12 sucked in.
  • the pre-feed pump 10 promotes the Fuel via a fuel filter 14 to a high pressure pump 16, the fuel under high pressure in an accumulator 18 feeds.
  • the pressure accumulator 18 is equipped with injection valves 20 in connection through which the fuel in the cylinder of the internal combustion engine is injected.
  • an electronic control unit 22 controlled via signal lines 24 with the individual Injector 20 is connected.
  • the electronic control unit 22 acts via a control line 26 also on a suction throttle valve 28, which between the feed pump 10 and the high pressure pump 16 in the fuel line is arranged and with the help of the flow the high pressure pump 16 can be controlled to the volume flow the high pressure pump 16 to adjust as required.
  • the delivery flow of the high pressure pump 16 can alternatively but also in other ways, such as a corresponding print or Speed-dependent design of the prefeed pump 10 changed become.
  • a pressure sensor 30 is attached to the pressure accumulator 18 the pressure prevailing in the pressure accumulator 18 is detected.
  • the output signal of the pressure sensor 30 becomes the electronic control unit 22 fed.
  • a pressure control valve 34 switched.
  • This Pressure control valve 34 directs excess fuel that not to maintain a desired pressure in the Pressure accumulator 18 is required via a fuel return line 36 back into the fuel tank 12.
  • the pressure control valve 34 is connected to the electronic via a control line 38
  • Control unit 22 connected to the pressure control valve 34 emits a control signal that the pressure in the pressure accumulator 18 determined.
  • the electronic control unit 22 determines the fuel quantity the pressure that is to be applied to the injection valves 20, the is called the target pressure in the pressure accumulator 18 or the injection pressure target value, and gives over the control lines 26 and 38 corresponding signals to the pressure control valve 34 and / or High pressure pump 16.
  • FIG. 2 shows a schematic block diagram for the Specification of the injection pressure setpoint by the electronic Control unit 22.
  • the setpoint FUP_SP_PL determined in this way for load operation is applied to a first timing element 204 and is, additively in a summation point 205 by the Output signal of the first timer 204 modified, too led to a second timer 401.
  • On the second timer 401 are also the setpoints FUP_SP_ST and FUP_SP_IS from the Maps 301 and 302 for the operating states start and Idle on.
  • the index i identifies the current computing cycle, i-1 the previous.
  • the setpoint value for the injection pressure in the event of a sudden change for example the amount of fuel injected, can be raised or lowered with an adapted timing behavior.
  • the time constants T 1 , T 2 and the gain factor K PDT1 for the first DT 1 timing element 204 are taken from characteristic curves 201, 202 and 203 depending on the speed in order to coordinate the setpoint intervention via the first timing element 204 depending on the speed.
  • variable FUP_SP in equation (2) is described depending on the engine operating state either with FUP_SP_ST for engine start, with FUP_SP_IS for engine idling or with FUP_SP_PL for load operation.
  • the timer 401 is also informed of the engine operating state in coded form via the ENGINE_STATE input.
  • the basic time constants T1_PT1_BAS for the PT 1 timer 401 are specified via the map 402 as a function of the coolant temperature TCO and the current control difference FUP_DIFF between the target and actual pressure of the injection in the high-pressure accumulator, in order to determine the behavior of the mixture preparation, which depends on the engine temperature, and that for the Pressure build-up and reduction take into account different timing behavior of the injection system.
  • this base time constant is subjected to a multiplicative weighting in a multiplication point 404 before it is fed as a final time constant to the timing element 401 and processed there in the form of the variable T 1 according to equation (2).
  • the weighting is carried out with the aid of map 403.
  • the information about the gear engaged is contained in coded form in the signal GEAR, which is present as an input variable on map 403.
  • the signal DRIVER_MODE of the driver identification function of a transmission control for an automatic transmission may be present at a further input of the characteristic diagram 403.
  • the one in the form described at the output of the timer 401 Setpoint FUP_SP for the injection pressure obtained is the Injection pressure regulator in the electronic control unit 22 supplied as an input signal, which ensures that in the pressure accumulator 18 of the fuel supply system for a particular Operating behavior optimal injection pressure set becomes.

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  • 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)
EP98124810A 1998-01-13 1998-12-29 Méthode pour prédéterminer la référence de pression d'un système d'injection de carburant avec accumulateur Expired - Lifetime EP0930426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800940 1998-01-13
DE19800940 1998-01-13

Publications (3)

Publication Number Publication Date
EP0930426A2 true EP0930426A2 (fr) 1999-07-21
EP0930426A3 EP0930426A3 (fr) 2000-11-08
EP0930426B1 EP0930426B1 (fr) 2003-12-03

Family

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EP98124810A Expired - Lifetime EP0930426B1 (fr) 1998-01-13 1998-12-29 Méthode pour prédéterminer la référence de pression d'un système d'injection de carburant avec accumulateur

Country Status (3)

Country Link
US (1) US6035829A (fr)
EP (1) EP0930426B1 (fr)
DE (1) DE59810332D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10144669C1 (de) * 2001-09-11 2003-04-17 Siemens Ag Verfahren und Vorrichtung zur Steuerung eines Kraftstoffdrucks für eine Hochdruckeinspritzung
EP1072780A3 (fr) * 1999-07-24 2003-05-07 Robert Bosch Gmbh Méthode de contrôle pour un système d'injection à rail d'alimentation commune
DE102004009616A1 (de) * 2004-02-27 2005-09-22 Siemens Ag Verfahren und Vorrichtung zur Steuerung des Volumenstroms in einem Kraftstoff-Einspritzsystem einer Brennkraftmaschine
WO2008019919A1 (fr) 2006-08-18 2008-02-21 Robert Bosch Gmbh Procédé de détermination d'une valeur de consigne de pression de rampe
EP1975030A3 (fr) * 2007-03-29 2010-08-04 Toyota Jidosha Kabushiki Kaisha Appareil de contrôle et procédé de contrôle pour véhicule
WO2014053220A1 (fr) * 2012-10-04 2014-04-10 Mtu Friedrichshafen Gmbh Procédé de régulation de la pression de rampe d'injection d'un moteur à combustion interne
CN110520617A (zh) * 2017-04-10 2019-11-29 罗伯特·博世有限公司 具有减小的回流量的燃料喷射

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JP2000018078A (ja) 1998-06-30 2000-01-18 Isuzu Motors Ltd コモンレール圧力の圧力降下開始時期特定方法，並びにエンジンの燃料噴射方法及びその装置
US6223720B1 (en) * 2000-06-02 2001-05-01 International Truck And Engine Corp. Diesel engine speed control to prevent under-run
DE10112163A1 (de) * 2001-03-14 2002-09-19 Bosch Gmbh Robert Speichereinspritzsystem (Common Rail) für Brennkraftmaschinen
DE10131783B4 (de) * 2001-07-03 2006-03-16 Robert Bosch Gmbh Verfahren zum Betrieb einer Brennkraftmaschine
DE10156637C1 (de) * 2001-11-17 2003-05-28 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung des Startbetriebs einer Brennkraftmaschine
US7100631B2 (en) * 2002-11-06 2006-09-05 Atomic Energy Council-Institute Of Nuclear Energy Research Multifunction passive and continuous fluid feeding system
SE0402222L (sv) * 2004-09-15 2006-02-07 Scania Cv Ab Bränsletrycksstyrning i ett common rail-system
US7200485B2 (en) * 2004-09-23 2007-04-03 International Engine Intellectual Property Company, Llc Transient speed-and transient load-based compensation of fuel injection pressure
DE102005026441B4 (de) * 2005-06-08 2009-11-12 Continental Automotive Gmbh Verfahren zur Adaption des Vorsteuerkennfeldes einer volumenstromgeregelten Diesel-Common-Rail Pumpe
WO2007083404A1 (fr) * 2006-01-20 2007-07-26 Bosch Corporation Système d'injection de carburant pour moteur à combustion interne
DE102007027943B3 (de) * 2007-06-18 2008-10-16 Mtu Friedrichshafen Gmbh Verfahren zur Regelung des Raildrucks während eines Startvorgangs
DE102017211077A1 (de) * 2017-06-29 2019-01-03 Continental Automotive Gmbh Verwendung einer Dieselinjektionsvorrichtung zum Einspritzen von Oxymethylenether (OME)
CN109779776B (zh) * 2017-11-13 2022-06-24 联合汽车电子有限公司 电子控制***及内燃机可变喷油压力控制方法

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072780A3 (fr) * 1999-07-24 2003-05-07 Robert Bosch Gmbh Méthode de contrôle pour un système d'injection à rail d'alimentation commune
DE10144669C1 (de) * 2001-09-11 2003-04-17 Siemens Ag Verfahren und Vorrichtung zur Steuerung eines Kraftstoffdrucks für eine Hochdruckeinspritzung
DE102004009616A1 (de) * 2004-02-27 2005-09-22 Siemens Ag Verfahren und Vorrichtung zur Steuerung des Volumenstroms in einem Kraftstoff-Einspritzsystem einer Brennkraftmaschine
WO2008019919A1 (fr) 2006-08-18 2008-02-21 Robert Bosch Gmbh Procédé de détermination d'une valeur de consigne de pression de rampe
US8096284B2 (en) 2006-08-18 2012-01-17 Robert Bosch Gmbh Method for determining a rail pressure setpoint value
EP1975030A3 (fr) * 2007-03-29 2010-08-04 Toyota Jidosha Kabushiki Kaisha Appareil de contrôle et procédé de contrôle pour véhicule
WO2014053220A1 (fr) * 2012-10-04 2014-04-10 Mtu Friedrichshafen Gmbh Procédé de régulation de la pression de rampe d'injection d'un moteur à combustion interne
CN110520617A (zh) * 2017-04-10 2019-11-29 罗伯特·博世有限公司 具有减小的回流量的燃料喷射
CN110520617B (zh) * 2017-04-10 2022-06-07 罗伯特·博世有限公司 具有减小的回流量的燃料喷射

Also Published As

Publication number Publication date
US6035829A (en) 2000-03-14
EP0930426A3 (fr) 2000-11-08
DE59810332D1 (de) 2004-01-15
EP0930426B1 (fr) 2003-12-03

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