EP1199459A2 - Verfahren zum Starten einer Brennkraftmaschine - Google Patents
Verfahren zum Starten einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP1199459A2 EP1199459A2 EP01119971A EP01119971A EP1199459A2 EP 1199459 A2 EP1199459 A2 EP 1199459A2 EP 01119971 A EP01119971 A EP 01119971A EP 01119971 A EP01119971 A EP 01119971A EP 1199459 A2 EP1199459 A2 EP 1199459A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- injection
- internal combustion
- combustion engine
- 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
Links
Images
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
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3076—Controlling fuel injection according to or using specific or several modes of combustion with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing
-
- 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
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- 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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
- F02D2200/0604—Estimation of fuel pressure
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
- F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
- F02D41/3023—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the stratified charge spark-ignited mode
-
- 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
Definitions
- the invention is based on a method for starting an internal combustion engine, in particular a motor vehicle, at which pressure is exerted on the fuel, and at which is the fuel in a shift operation during a Compression phase or in a homogeneous operation during injected directly into a combustion chamber during an intake phase becomes.
- the invention also relates to a corresponding one Internal combustion engine, a corresponding control unit as well an appropriate computer program for such Internal combustion engine.
- Such a method such Internal combustion engine, such a control unit and a such a computer program are, for example, from a known as gasoline direct injection.
- the fuel is pre-injected Fuel accumulator pressurized. This represents the pressure on the fuel acts, and with which the fuel with it over the Injectors are injected into the combustion chambers.
- the object of the invention is a method for starting to create an internal combustion engine with which a Blow fuel back into the accumulator safely is avoided.
- This task is initiated in a procedure mentioned type according to the invention solved in that the End or after an injection on the fuel acting pressure is determined, and that depending from this pressure the shift operation excluded or is allowed.
- the task according to the invention solved.
- Invention is derived from the pre-injection in the Fuel storage existing fuel mass and from the Fuel mass to be injected after injection Mass of fuel present in the fuel accumulator determined. This is done by means of a difference carried out.
- Threshold pressure corresponds approximately to that pressure which is necessary for the shift operation to be carried out can be.
- shift operation is excluded if the on End or after fuel injection acting pressure is less than the threshold pressure.
- the realization of the inventive method in the form of a Computer program for a control unit Internal combustion engine, in particular a motor vehicle, is provided.
- the computer program is special executable on a microprocessor and for executing the method according to the invention suitable.
- the invention is implemented by the computer program, so that this computer program in the same way the Invention represents how the method for carrying it out the computer program is suitable.
- the computer program can be stored on an electrical storage medium be, for example on a flash memory or Read-only memory.
- an internal combustion engine 1 is one Motor vehicle shown, in which a piston 2 in one Cylinder 3 is reciprocable.
- the cylinder 3 is with a combustion chamber 4 provided, inter alia, by the Piston 2, an inlet valve 5 and an outlet valve 6 is limited.
- the inlet valve 5 is an intake pipe 7 and an exhaust pipe 8 is coupled to the exhaust valve 6.
- Fuel can be injected via the injection valve 9 the combustion chamber 4 are injected. With the spark plug 10 the fuel can be ignited in the combustion chamber 4.
- the intake pipe 7 there is a rotatable throttle valve 11 housed, through which the intake pipe 7 air can be supplied is.
- the amount of air supplied depends on the Angular position of the throttle valve 11 is in the exhaust pipe 8 a catalyst 12 housed, the cleaning of the exhaust gases generated by the combustion of the fuel serves.
- the injection valve 9 is connected to a pressure line Fuel accumulator 13 connected. In a similar way are also the injectors of the other cylinders Internal combustion engine 1 with the fuel accumulator 13 connected.
- the fuel accumulator 13 is a Supply line supplied with fuel. This is a electrical and / or mechanical fuel pump provided, which is suitable to the desired pressure in to build up the fuel accumulator 13.
- a control unit 15 is of input signals 16 acted upon, the operating variables measured by sensors represent the internal combustion engine 1.
- the control unit 15 connected to an accelerator pedal sensor that receives a signal generates the position of one by a driver actuated accelerator pedal and thus the requested Torque indicates.
- the control unit 15 generates Output signals 17 with which via actuators or actuators the behavior of the internal combustion engine 1 can be influenced can.
- the control unit 15 with the Injector 9, the spark plug 10 and the throttle valve 11 and the like connected and generated to their Control necessary signals.
- control device 15 is provided for the To control operating variables of the internal combustion engine 1 and / or to regulate.
- the injector 9 injected into the combustion chamber 4 fuel mass from the Control unit 15, in particular with regard to a small one Fuel consumption and / or a low Controlled and / or regulated pollutant development.
- the control unit 15 with a Microprocessor provided in a storage medium, a computer program, in particular in a flash memory has saved, which is suitable for the named Control and / or regulation to perform.
- the internal combustion engine 1 of Figure 1 can in a plurality operated by operating modes. So it is possible that Internal combustion engine 1 in a homogeneous operation, one Shift operation, a homogeneous lean operation, an operation to operate with double injection and the like.
- the fuel is used during the Intake phase from the injection valve 9 directly into the Combustion chamber 4 of the internal combustion engine 1 is injected.
- the As a result, fuel is largely used until ignition swirls so that in the combustion chamber 4 a substantially homogeneous fuel / air mixture is created. That too generating moment is essentially about the Position of throttle valve 11 from control unit 15 set.
- the homogeneous lean operation largely corresponds to that Homogeneous operation, however, the lambda becomes one value set greater than one.
- the fuel is used during the Compression phase from the injector 9 directly into the Combustion chamber 4 of the internal combustion engine 1 is injected.
- the throttle valve 11 can, apart from of requirements e.g. the exhaust gas recirculation and / or the Tank ventilation, fully open and the Internal combustion engine 1 to be operated dethrottled.
- the torque to be generated is largely in shift operation adjusted via the fuel mass.
- the internal combustion engine 1 can operate in shifts in particular be operated at idle and at partial load.
- the internal combustion engine 1 after a longer Standstill started, especially at low Temperatures injected into the combustion chamber 4 Fuel mass significantly increased. That way not just an ignitable air / fuel mixture in the Combustion chamber 4 provided, but it will also compensated for those losses of fuel caused by the entry of fuel in the engine oil and / or by the construction of a wall film made of fuel in the combustion chamber 4 arise.
- FIG. 2 shows a method with which the control unit 15 that pressure in the Fuel storage 13 is determined, there after a Injection is still present. With the help of this pressure it is then decided whether the internal combustion engine 1 in Shift operation can be operated or not. This The procedure is particularly for the starting process Internal combustion engine 1 suitable, but can also during other operations of the same are used.
- the pressure sensor 14 is used Pressure in the fuel accumulator 13 measured. This measurement takes place immediately before or immediately on Start of the next injection of fuel into the Combustion chamber 4.
- control unit 15 calculates the fuel mass m Kr to be injected from the operating variables of the internal combustion engine 1, as has already been explained.
- the operating variables can be the engine temperature, the ambient temperature and the like.
- the pressure p 13 in the fuel reservoir 13 is then determined in a step 24 immediately after the end or immediately after the injection of the fuel mass m Kr into the combustion chamber 4.
- the mass in the fuel accumulator 13 is no longer the fuel mass m Kr13 present before the injection, but rather the fuel mass m Kr13 present after the injection.
- the other variables that is to say the ambient pressure, the modulus of elasticity, etc., are either either known or can be measured or calculated in some other way.
- the pressure p 13 is then compared in the fuel accumulator 13 at the end or after the injection with a threshold value pressure p threshold .
- the threshold value pressure p threshold corresponds approximately to the pressure which is required for the stratified operation to be carried out without the risk of fuel being blown back into the fuel accumulator 13.
- step 26 If the pressure p 13 thereafter is greater than the threshold pressure p threshold , this means that there is still enough pressure in the fuel accumulator 13 to operate the internal combustion engine 1 in stratified mode . In this case, shift operation is therefore permitted in step 26.
- step 24 repeats steps 21 through 24.
- This repetition then refers to the next injection.
- four such repetitions can be four, for example Work cycles of a certain cylinder in advance be calculated.
- the result is the pressure in the Fuel storage after these four work cycles. With This pressure can then affect decision making Steps 25, 26, 27 are performed.
Abstract
Description
- Figur 1
- zeigt ein schematisches Blockschaltbild eines Ausführungsbeispiels einer erfindungsgemäßen Brennkraftmaschine, und
- Figur 2
- zeigt ein schematisches Ablaufdiagramm eines erfindungsgemäßen Verfahrens zum Starten der Brennkraftmaschine der Figur 1.
Claims (12)
- Verfahren zum Starten einer Brennkraftmaschine (1) insbesondere eines Kraftfahrzeugs, bei dem ein Druck auf den Kraftstoff ausgeübt wird, und bei dem der Kraftstoff in einem Schichtbetrieb während einer Verdichtungsphase oder in einem Homogenbetrieb während einer Ansaugphase direkt in einen Brennraum (4) eingespritzt wird, dadurch gekennzeichnet, daß der am Ende oder nach einer Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) ermittelt wird, und daß in Abhängigkeit von diesem Druck (p13danach) der Schichtbetrieb ausgeschlossen oder zugelassen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der vor oder am Anfang der Einspritzung auf den Kraftstoff einwirkende Druck (p13) von einem Drucksensor (14) gemessen wird.
- Verfahren nach einem der Ansprüche 1 oder 2, wobei ein Kraftstoffspeicher (13) vorgesehen ist, dadurch gekennzeichnet, daß aus dem vor oder am Anfang der Einspritzung auf den Kraftstoff einwirkenden Druck (p13) eine vor der Einspritzung in dem Kraftstoffspeicher (13) vorhandene Kraftstoffmasse (mKr13) ermittelt wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß eine einzuspritzende Kraftstoffmasse (mKr) aus Betriebsgrößen der Brennkraftmaschine (1)
- Verfahren nach den Ansprüche 3 und 4, dadurch gekennzeichnet, daß aus der vor der Einspritzung in dem Kraftstoffspeicher (13) vorhandenen Kraftstoffmasse (mKr13) und aus der einzuspritzenden Kraftstoffmasse (mKr) eine nach der Einspritzung in dem Kraftstoffspeicher (13) vorhandene Kraftstoffmasse (mKr13danach) ermittelt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß aus der nach der Einspritzung in dem Kraftstoffspeicher (13) vorhandenen Kraftstoffmasse (mKr13danach) der am Ende oder nach der Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) ermittelt wird.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der am Ende oder nach der Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) mit einem Schwellwertdruck (pSchwelle) verglichen wird.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß der Schichtbetrieb ausgeschlossen wird, wenn der am Ende oder nach der Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) kleiner ist als der Schwellwertdruck (pSchwelle).
- Computerprogramm für ein Steuergerät (15) einer Brennkraftmaschine (1) insbesondere eines Kraftfahrzeugs, dadurch gekennzeichnet, daß das Computerprogramm zur Ausführung eines Verfahrens nach einem der Ansprüche 1 bis 8 geeignet ist.
- Computerprogramm nach Anspruch 9, dadurch gekennzeichnet, daß das Computerprogramm auf einem elektrischen Speichermedium, insbesondere auf einem Flash-Memory oder einem Read-Only-Memory abgespeichert ist.
- Steuergerät (15) für eine Brennkraftmaschine (1) insbesondere eines Kraftfahrzeugs, wobei beim Starten der Brennkraftmaschine (1) ein Druck auf den Kraftstoff ausgeübt werden kann, und wobei der Kraftstoff in einem Schichtbetrieb während einer Verdichtungsphase oder in einem Homogenbetrieb während einer Ansaugphase direkt in einen Brennraum (4) einspritzbar ist, dadurch gekennzeichnet, daß durch das Steuergerät (15) der am Ende oder nach einer Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) ermittelbar ist, und daß durch das Steuergerät (15) in Abhängigkeit von diesem Druck (p13danach) der Schichtbetrieb ausgeschlossen oder zugelassen werden kann.
- Brennkraftmaschine (1) insbesondere eines Kraftfahrzeugs mit einem Steuergerät (15), wobei beim Starten der Brennkraftmaschine (1) ein Druck auf den Kraftstoff ausgeübt werden kann, und wobei der Kraftstoff in einem Schichtbetrieb während einer Verdichtungsphase oder in einem Homogenbetrieb während einer Ansaugphase direkt in einen Brennraum (4) einspritzbar ist, dadurch gekennzeichnet, daß durch das Steuergerät (15) der am Ende oder nach einer Einspritzung auf den Kraftstoff einwirkende Druck (p13danach) ermittelbar ist, und daß durch das Steuergerät (15) in Abhängigkeit von diesem Druck (p13danach) der Schichtbetrieb ausgeschlossen oder zugelassen werden kann.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000152344 DE10052344A1 (de) | 2000-10-21 | 2000-10-21 | Verfahren zum Starten einer Brennkraftmaschine |
DE10052344 | 2000-10-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1199459A2 true EP1199459A2 (de) | 2002-04-24 |
EP1199459A3 EP1199459A3 (de) | 2005-07-20 |
EP1199459B1 EP1199459B1 (de) | 2008-06-11 |
Family
ID=7660645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010119971 Expired - Lifetime EP1199459B1 (de) | 2000-10-21 | 2001-08-18 | Verfahren zum Starten einer Brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1199459B1 (de) |
JP (1) | JP4071952B2 (de) |
DE (2) | DE10052344A1 (de) |
ES (1) | ES2304365T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3879568B2 (ja) * | 2002-04-08 | 2007-02-14 | トヨタ自動車株式会社 | 筒内噴射式火花点火内燃機関 |
DE10341789B4 (de) * | 2003-09-10 | 2008-02-14 | Siemens Ag | Verfahren und Vorrichtung zum Starten einer Brennkraftmaschine mit direkter Einspritzung des Kraftstoffs in den Brennraum |
JP4581586B2 (ja) | 2004-09-17 | 2010-11-17 | トヨタ自動車株式会社 | 内燃機関システム及びこれを搭載する自動車並びに内燃機関の始動方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0849460A2 (de) * | 1996-12-19 | 1998-06-24 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzeinrichtung und Verfahren für Brennkraftmaschine mit Direkteinspritzung |
US5979400A (en) * | 1996-09-10 | 1999-11-09 | Nissan Motor Co., Ltd. | Fuel injection control method and system in a direct injection type gasoline internal combustion engine |
EP0961019A2 (de) * | 1998-05-25 | 1999-12-01 | Siemens Aktiengesellschaft | Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine während des Starts |
DE19827609A1 (de) * | 1998-06-20 | 1999-12-23 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
WO2000058618A1 (de) * | 1999-03-25 | 2000-10-05 | Robert Bosch Gmbh | Verfahren zum betreiben einer brennkraftmaschine |
EP1083327A2 (de) * | 1999-09-09 | 2001-03-14 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzungsregler in einer Brennkraftmaschine mit Direkteinspritzung |
-
2000
- 2000-10-21 DE DE2000152344 patent/DE10052344A1/de not_active Ceased
-
2001
- 2001-08-18 EP EP20010119971 patent/EP1199459B1/de not_active Expired - Lifetime
- 2001-08-18 DE DE50114020T patent/DE50114020D1/de not_active Expired - Lifetime
- 2001-08-18 ES ES01119971T patent/ES2304365T3/es not_active Expired - Lifetime
- 2001-10-18 JP JP2001320566A patent/JP4071952B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5979400A (en) * | 1996-09-10 | 1999-11-09 | Nissan Motor Co., Ltd. | Fuel injection control method and system in a direct injection type gasoline internal combustion engine |
EP0849460A2 (de) * | 1996-12-19 | 1998-06-24 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzeinrichtung und Verfahren für Brennkraftmaschine mit Direkteinspritzung |
EP0961019A2 (de) * | 1998-05-25 | 1999-12-01 | Siemens Aktiengesellschaft | Verfahren zum Betreiben einer direkteinspritzenden Brennkraftmaschine während des Starts |
DE19827609A1 (de) * | 1998-06-20 | 1999-12-23 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
WO2000058618A1 (de) * | 1999-03-25 | 2000-10-05 | Robert Bosch Gmbh | Verfahren zum betreiben einer brennkraftmaschine |
EP1083327A2 (de) * | 1999-09-09 | 2001-03-14 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzungsregler in einer Brennkraftmaschine mit Direkteinspritzung |
Also Published As
Publication number | Publication date |
---|---|
EP1199459B1 (de) | 2008-06-11 |
EP1199459A3 (de) | 2005-07-20 |
JP2002180891A (ja) | 2002-06-26 |
ES2304365T3 (es) | 2008-10-16 |
JP4071952B2 (ja) | 2008-04-02 |
DE50114020D1 (de) | 2008-07-24 |
DE10052344A1 (de) | 2002-05-02 |
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