EP0930426A2 - Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen - Google Patents
Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen Download PDFInfo
- 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
- Authority
- 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
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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.
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)
Abstract
Description
Claims (7)
- Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen zur Kraftstoffzuführung in Verbrennungsmotoren, wobei über die Sollwert-Vorgabe der Druck in einem Druckspeicher (18) in Abhängigkeit von den Betriebszuständen des Verbrennungsmotors eingestellt wird,mit Kennfeldern (101, 301, 302) für einen Einspritzdruck-Basiswert im Lastbetrieb (FUP_SP_PL_BAS), beim Motorstart (FUP_SP_ST) und im Leerlauf (FUP_SP_IS);mit einem ersten differentiellen DT1-Zeitglied (204), an dessen Eingang der Ausgang des Lastbetrieb-Kennfeldes (101) anliegt und dessen Zeitverhalten von der Motordrehzahl abhängt; undmit einem zweiten PT1-Verzögerungs-Zeitglied (401), an dessen Eingang der Ausgang des ersten Zeitgliedes (204), die Ausgänge der Kennfelder (301, 302) für den Start und den Leerlauf und der Ausgang eines Kennfeldes (402) für die Vorgabe einer Basiszeitkonstanten (T1_PT1_BAS) anliegen und an dessen Ausgang der Einspritzdruck-Sollwert (FUP_SP) für den jeweiligen Betriebszustand des Verbrennungsmotors abgegeben wird.
- Verfahren nach Anspruch 1, mit einer Kennlinie (102) für die kühlmitteltemperaturabhängige Modifikation des Einspritzdruck-Basiswertes (FUP_SP_PL_BAS) aus dem Kennfeld (101) für den Lastbetrieb.
- Verfahren nach Anspruch 1, mit Kennlinien (201, 202, 203) zur drehzahlabhängigen Vorgabe von Zeitkonstanten (T1, T2) und eines Verstärkungsfaktors (KPDT1) an das erste Zeitglied (204).
- Verfahren nach Anspruch 1, wobei der Ausgang des Kennfeldes (402) für die Vorgabe einer Basiszeitkonstanten (T1_PT1_BAS) für das zweite Zeitglied (401) durch ein Kennfeld (403) für den eingelegten Gang und das Fahrverhalten des Fahrers modifiziert wird.
- Verfahren nach Anspruch 1, wobei am Eingang des zweiten Zeitgliedes (401) ein Signal (ENGINE_STATE) über den Motorbetriebszustand anliegt.
- Verfahren nach Anspruch 1, wobei die Gleichung für die Übertragungsfunktion des ersten Zeitgliedes (204) in rekursiver Form lautet, mitFUP_SP_PL_DYN(i): Ausgangssignal des ersten Zeitgliedes;KPDT1: Verstärkungsfaktor;T1: erste Zeitkonstante;T2: zweite Zeitkonstante;FUP_SP_PL(i): Einspritzdruck-Sollwert im Lastbetrieb;ta: Abtastzeit;
- Verfahren nach Anspruch 1, wobei die Gleichung für die Übertragungsfunktion des zweiten Zeitgliedes (401) in rekursiver Form lautet, mitFUP_SP_DFT(i): verzögerter Einspritzdruck-Sollwert;FUP_SP(i): aktueller Einspritzdruck-Sollwert;T1: Zeitkonstante des Verzögerungs-Zeitgliedes;ta: Abtastzeit;
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 (de) | 1999-07-21 |
EP0930426A3 EP0930426A3 (de) | 2000-11-08 |
EP0930426B1 EP0930426B1 (de) | 2003-12-03 |
Family
ID=7854457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98124810A Expired - Lifetime EP0930426B1 (de) | 1998-01-13 | 1998-12-29 | Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen |
Country Status (3)
Country | Link |
---|---|
US (1) | US6035829A (de) |
EP (1) | EP0930426B1 (de) |
DE (1) | DE59810332D1 (de) |
Cited By (8)
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 (de) * | 1999-07-24 | 2003-05-07 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Common-Rail-Einspritzsystems |
DE102004009616A1 (de) * | 2004-02-27 | 2005-09-22 | Siemens Ag | Verfahren und Vorrichtung zur Steuerung des Volumenstroms in einem Kraftstoff-Einspritzsystem einer Brennkraftmaschine |
WO2008019919A1 (de) | 2006-08-18 | 2008-02-21 | Robert Bosch Gmbh | Verfahren zur bestimmung eines raildruck-sollwertes |
EP1975030A3 (de) * | 2007-03-29 | 2010-08-04 | Toyota Jidosha Kabushiki Kaisha | Steuervorrichtung und Steuerverfahren für ein Fahrzeug |
EP2470768A4 (de) * | 2009-08-27 | 2013-11-13 | Mcalister Technologies Llc | Verfahren und system zur reduzierten bildung von stickoxiden während verbrennungsvorgängen in motoren |
WO2014053220A1 (de) * | 2012-10-04 | 2014-04-10 | Mtu Friedrichshafen Gmbh | Verfahren zur raildruckregelung einer brennkraftmaschine |
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 |
Families Citing this family (13)
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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 |
SE527295C2 (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 (ja) * | 2006-01-20 | 2007-07-26 | Bosch Corporation | 内燃機関の燃料噴射システム |
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 | 电子控制系统及内燃机可变喷油压力控制方法 |
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DE4313852B4 (de) * | 1993-04-28 | 2004-11-25 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
US5678521A (en) * | 1993-05-06 | 1997-10-21 | Cummins Engine Company, Inc. | System and methods for electronic control of an accumulator fuel system |
IT1261574B (it) * | 1993-09-03 | 1996-05-23 | Fiat Ricerche | Sistema di controllo dell'iniezione in impianti di iniezione ad alta pressione per motori a combustione interna |
ES2115883T3 (es) * | 1993-09-14 | 1998-07-01 | Lucas Ind Plc | Dispositivo de alimentacion de carburante. |
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EP0747585B1 (de) * | 1995-06-07 | 2002-07-17 | Volkswagen Aktiengesellschaft | Steuerung für den Ladedruck eines Turboladers an einer Brennkraftmaschine |
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DE19607070B4 (de) * | 1996-02-24 | 2013-04-25 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
DE19618932C2 (de) * | 1996-05-10 | 2001-02-01 | Siemens Ag | Vorrichtung und Verfahren zur Regelung des Kraftstoffdruckes in einem Hochdruckspeicher |
-
1998
- 1998-12-29 DE DE59810332T patent/DE59810332D1/de not_active Expired - Lifetime
- 1998-12-29 EP EP98124810A patent/EP0930426B1/de not_active Expired - Lifetime
-
1999
- 1999-01-13 US US09/229,927 patent/US6035829A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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None |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1072780A3 (de) * | 1999-07-24 | 2003-05-07 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Common-Rail-Einspritzsystems |
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 (de) | 2006-08-18 | 2008-02-21 | Robert Bosch Gmbh | Verfahren zur bestimmung eines raildruck-sollwertes |
US8096284B2 (en) | 2006-08-18 | 2012-01-17 | Robert Bosch Gmbh | Method for determining a rail pressure setpoint value |
EP1975030A3 (de) * | 2007-03-29 | 2010-08-04 | Toyota Jidosha Kabushiki Kaisha | Steuervorrichtung und Steuerverfahren für ein Fahrzeug |
EP2470768A4 (de) * | 2009-08-27 | 2013-11-13 | Mcalister Technologies Llc | Verfahren und system zur reduzierten bildung von stickoxiden während verbrennungsvorgängen in motoren |
WO2014053220A1 (de) * | 2012-10-04 | 2014-04-10 | Mtu Friedrichshafen Gmbh | Verfahren zur raildruckregelung einer brennkraftmaschine |
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 |
EP0930426B1 (de) | 2003-12-03 |
EP0930426A3 (de) | 2000-11-08 |
DE59810332D1 (de) | 2004-01-15 |
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