EP1353055A2 - Verfahren zum Betreiben einer Brennkraftmaschine, Brennkraftmaschine und Steuerelement - Google Patents
Verfahren zum Betreiben einer Brennkraftmaschine, Brennkraftmaschine und Steuerelement Download PDFInfo
- Publication number
- EP1353055A2 EP1353055A2 EP02028307A EP02028307A EP1353055A2 EP 1353055 A2 EP1353055 A2 EP 1353055A2 EP 02028307 A EP02028307 A EP 02028307A EP 02028307 A EP02028307 A EP 02028307A EP 1353055 A2 EP1353055 A2 EP 1353055A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- throttle valve
- mass flow
- determined
- valve
- internal combustion
- 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.)
- Withdrawn
Links
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
Definitions
- the present invention relates to a method for operating an internal combustion engine, an internal combustion engine and a control element for a control device such an internal combustion engine.
- Internal combustion engines in particular internal combustion engines for motor vehicles, have an intake manifold with an associated throttle valve to control the Air flow in the intake pipe. At least one combustion chamber is provided each combustion chamber having at least one inlet valve.
- variable intake valves in internal combustion engines
- valve lift control By changing the valve stroke the amount of air flowing into the combustion chamber is changed.
- the object of the invention is therefore to provide a value for in the simplest possible way to determine the cylinder charge in vehicles with valve lift control.
- This task is carried out in a method of the type mentioned at the beginning or in an internal combustion engine of the type mentioned in the introduction solved that the cylinder filling depending on the air mass flow over the throttle valve, which in turn depends on the throttle valve position the throttle valve angle - depends on the air temperature in front of the throttle valve, engine speed and intake valve lift is determined.
- the method according to the invention is suitable using fewer sensors to determine the cylinder charge. Both influencing factors, Throttle valve position and valve lift of the intake valve are taken into account.
- the procedure is suitable the number of sensors required for the internal combustion engine and keep their total costs low. On the other hand, that leads Procedure when there is a larger number of sensors also to that redundancy can be created if sensors fail.
- the use of an air mass sensor is not mandatory in the method.
- the Air mass flow across the throttle valve using a given one Standard mass flow or by measuring the pressure in front of the throttle valve is determined. It is still favorable if the air mass flow over the throttle valve is determined per cylinder stroke of the internal combustion engine.
- This Methods of determining the air mass flow or alternatively the Pressure in front of the throttle valve enable a technically favorable determination and Further processing of this intermediate size.
- cylinder filling via the intake valve from a depending on engine speed and the starting valve stroke of the predetermined standard cylinder filling is determined.
- the investigation Using the standard cylinder filling has the advantage that the calculation of the Cylinder filling regardless of the calculation of the air mass flow over the Throttle valve is.
- the standard cylinder filling depends on the variable Valve stroke specified.
- Another advantageous embodiment of the invention provides that the cylinder charge per cylinder stroke is determined.
- the inventive one can Procedure to determine the air mass flow via the throttle valve a factor for the intake manifold pressure of a standard mass flow, which is determined in such a way that the air mass flow determined on the basis of this factor corresponds to the measured air mass flow.
- the intake manifold pressure upstream of the inlet valve is determined in such a way that the air mass flow via the throttle valve matches the cylinder charge.
- the presence of a steady state is therefore assumed.
- the cylinder charge is a volume flow of air through the at least one inlet valve. This measure makes the determination of the air mass flow via the throttle valve in accordance with the determination of the filling of the cylinder brought. This coupling allows the cylinder filling to be determined without measuring the pressure upstream of the inlet valve.
- Feedback of the signal can be provided that the difference from the Air mass flow via the throttle valve and the cylinder charge, i.e. the gas volume, that flows into the cylinder is fed to an integrator. about The integrator can then determine the pressure factor used in the determination the cylinder filling must be taken into account.
- an internal combustion engine in particular one for a motor vehicle, an intake manifold.
- the intake pipe is a throttle valve assigned.
- the throttle is assigned an angle sensor. From a control unit can from the angular position the throttle valve, which was measured by the angle sensor, a standard mass flow can be determined via the throttle valve. From the standard mass flow the mass flow can be determined via the throttle valve. Next to it is from the Valve stroke of the inlet valve is a standard cylinder filling and from this in turn one Derived cylinder filling. It is particularly advantageous if it is in the determination the cylinder charge, it can be taken into account that the air mass flow over the The throttle valve and the cylinder charge (when stationary) correspond to each other.
- the type of determination of the individual factors on the basis of the measurement signals and the required sensors is described in DE 197 40 970 A1, to which reference is hereby expressly made.
- FIG. 1 shows a block diagram of the sequence of the method carried out.
- the standard mass flow MSNDK is taken from the characteristic diagram 11 in WDK.
- This signal is multiplied by the correction factor FPVDK for multiplied the pressure in front of the throttle valve.
- the multiplier 13 the result with the correction factor for the temperature before Throttle valve FTVDK and in the further multiplier 14 with the correction value KLAF, which is taken from the characteristic value table 15, performed. you receives the air mass flow MSDK via the throttle valve as calculated has been.
- This value can be measured with a measured air mass flow MSHFM be compared in the comparator 16, so that a characteristic curve for the generation is derived therefrom of the correction factor FPVDK for the pressure upstream of the throttle valve can be supplied to the multiplier 12. This will a closed control loop is formed, which is only used to determine the Air mass flow via the throttle valve is involved.
- the result of the air mass flow MSDK is also still fed to the divisor 17, which has the value for the flowing through the throttle valve Air mass flow MSDK by the product of the engine speed n with a Constant K divided and thus one related to the individual stroke Air flow into the intake manifold determined.
- the unit size becomes relative Filling in the combustion chamber determined per stroke.
- the constant represents K is the number of cylinders depending on the number of work cycles per cylinder. The result of this division is then fed to the comparator 18.
- the air mass flow via the inlet valve is calculated in a correspondingly modeled manner.
- the air mass flow MSVTT via the intake valve can be determined from a standard air mass flow MSNVTT specified under standard conditions in function of the intake valve lift HVTT and the engine speed n.
- the map 19 is determined, to which the two values for the intake valve lift HVTT and the engine speed n are supplied.
- the result of the reading from the characteristic value table 19 provides the cylinder filling under standard conditions.
- the cylinder charge is the air mass flow through the inlet valve.
- the value for the cylinder charge under standard conditions MSNVTT read from the characteristic value table 19 is fed to the multiplier 20.
- MSNVTT MSNVTT (HVTT, n) x FPS x FTVDK results in the cylinder filling under the occurring conditions.
- the intake manifold pressure is used to link the two models modeled.
- the intake manifold provides a pressure accumulator represents, the pressure increases when the inflow in the intake manifold via the throttle valve the drain from the intake pipe via the inlet valve exceeds. With increasing Intake manifold pressure increases the flow through the inlet valve. It turns out according to this assumption of the model, a steady state overall, at which the two mass flows correspond to each other.
- the integrator 23 with the difference between the two mass flows MSVTT and MSDK or that every single piston stroke-related result of these values is fed, which in the Comparator 18 is determined.
- the result of this integrator provides the pressure factor FPS, which is fed to the multiplier 20.
- FIG. 2 is the corresponding schematic block diagram for the method shown in the presence of a pressure sensor.
- the correction factor or the pressure upstream of the inlet valve FPS then results from the differential element 16, on the one hand the air mass flow MSDK via the throttle valve and on the other hand the air mass flow MSVTT is supplied via the inlet valve. from that a difference value is then determined in an integrator and is returned, on the one hand as a correction factor for the air flow at the intake valve, i.e. the cylinder charge to be used and on the other hand to determine the air mass flow correction factor KLAF to be used. Otherwise match the functional members of Figures 1 and 2 each other and therefore have the same reference numerals. After the pressure values more directly with each other some calculation steps can be omitted.
- FIGS. 3 and 4 each show a schematic model of a cylinder 30 with the piston 31 guided therein and the inlet valve 32.
- the cylinder Via the inlet valve with the HVTT valve lift, the cylinder is filled.
- the intake manifold 33 there is the intake manifold pressure PS, behind the throttle valve 34.
- the angular position the throttle valve 34 is detected by a sensor and supplies the value for the Throttle valve position WDK.
- the pressure PVDK prevails in front of the throttle valve.
- the air mass flow MSHFM can be measured via an air mass sensor HFM become.
- the temperature in front of the intake air is called TVDK.
- Figure 4 shows the same schematic representation of the internal combustion engine.
- the air mass flow sensor HFM by a pressure sensor for the front of the throttle valve replaced, which supplies the pressure PVDK as a signal.
- the temperature before Throttle valve TVDK can be detected by a sensor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
- Fig. 1
- ein schematisches Blockschaltbild eines erfindungsgemäßen Verfahrens mit einem Luftmassensensor zur Ermittlung der Zy- linderfüllung bei einer variablen Ventilhubsteuerung;
- Fig. 2
- ein schematisches Blockschaltbild der Ermittlung der Zylinderfüllung bei variabler Ventilhubsteuerung mit Verwendung eines Drucksensors und unter Modellierung des Saugrohrdruckes;
- Fig. 3
- in schematischer Darstellung die Brennkammer einer Brenn- kraftmaschine und das zugeordnete Ansaugrohr mit Drosselklappe bei Luftmassenstrommessung; und
- Fig. 4
- die Anordnung der Fig. 3, wobei die Luftmassenstrommessung durch eine Druckmessung mittels einer Drosselklappe ersetzt wurde.
Claims (12)
- Verfahren zum Betreiben einer Brennkraftmaschine, insbesondere für ein Kraftfahrzeug, bei dem Luft über ein einem Ansaugrohr zugeordnete Drosselklappe und über wenigstens ein Einlassventil mit variabler Ventilhubsteuerung zur Beeinflussung des Ventilhubes einem Brennraum zugeführt wird, wobei die Zylinderfüllung mit Luft ermittelt wird, dadurch gekennzeichnet, dass die Zylinderfüllung aufgrund der Größen Luftmassenstrom (MSHFM) über der Drosselklappe (34) in Abhängigkeit der Drosselklappenstellung (WDK), der Lufttemperatur (TVDK) vor der Drosselklappe, Motordrehzahl (n) und Einlassventilhub (HVTT) ermittelt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Luftmassenstrom (MSHFM) über die Drosselklappe (34) unter Verwendung eines in Abhängigkeit des Drosselklappenwinkels (WDK) vorgegebenen Normmassenstromes (MSNDK) ermittelt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Luftmassenstrom (MSHFM) über die Drosselklappe (34) ins Saugrohr je Zylinderhub der Brennkraftmaschine ermittelt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass anstelle des Luftmassenstromes (MSHFM) der Umgebungsdruck (PVDK) vor der Drosselklappe (34) verwendet wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Zylinderfüllung über das Einlassventil (32) aus einer in Abhängigkeit von Motordrehzahl (n) und Einlassventilhub (HVTT) vorgegebenen Normzylinderfüllung ermittelt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass zur Ermittlung der Zylinderfüllung die Normzylinderfüllung mit Korrekturfaktoren (FPVDK bzw. FTVDK) multipliziert wird, die den Saugrohrdruck und die Temperatur vor dem Einlassventil repräsentieren.
- Verfahren nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß die Zylinderfüllung je Zylinderhub ermittelt wird.
- Verfahren nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß bei der Ermittlung der Massenstroms (MSDK) über die Drossel-klappe (34) ein Faktor für den Saugrohrdruck (FPVDK) verwendet wird, wobei der Faktor für den Saugrohrdruck derart bestimmt wird, dass der aufgrund des Faktors ermittelte Luftmassenstrom (MSDK) mit einem gemessenen Luftmassenstrom (MSH FM) übereinstimmt.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Saugrohrdruck vor dem Einlassventil (32) so bestimmt wird, dass der Luftmassenstrom (MSDK) die Drosselklappe (34) der Zylinderfüllung übereinstimmt.
- Steuerelement, insbesondere Read-Only-Memory, für ein Steuergerät einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs, auf dem ein Programm abgespeichert ist, das auf einem Rechengerät, insbesondere einem Mikroprozessor ablauffähig und zur Ausführung eines Verfahrens nach einem der vorhergehenden Ansprüche geeignet ist.
- Brennkraftmaschine insbesondere für ein Kraftfahrzeug, mit einer in einem Ansaugrohr angeordneten Drosselklappe (34) und wenigstens einem Einlassventil (32) mit variabler Ventilhubsteuerung für jeden Brennraum, über die Luft dem Brennraum zuführbar ist, und mit einem Steuergerät, mit dem der Massenstrom (MSDK) über die Drosselklappe und die Zylinderfüllung ermittelbar ist, dadurch gekennzeichnet, dass der Drosselklappe (34) ein Winkelsensor zugeordnet ist, dass von dem Steuergerät aus der von dem Winkelsensor gemessenen Winkelstellung (WDK) der Drosselklappe (34) ein Normmassenstrom (MSNDK) über die Drosselklappe ermittelbar ist, und aus dem Normmassenstrom (MSNDK) der Massenstrom (MSDK) über die Drosselklappe (34) ermittelbar ist, dass aufgrund des Einlassventilhubes (HVTT) zuerst eine Normzylinderfüllung und daraus in Abhängigkeit von wenigstens einem Parameter der Brennkraftmaschine eine Zylinderfüllung ermittelbar ist.
- Brennkraftmaschine nach Anspruch 11, dadurch gekennzeichnet, daß bei der Ermittlung der Zylinderfüllung berücksichtigbar ist, dass Luftmassenstrom (MSDK) über die Drosselklappe (34) und Zylinderfüllung einander entsprechen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10215672A DE10215672A1 (de) | 2002-04-10 | 2002-04-10 | Verfahren zum Betreiben einer Brennkraftmaschine, Brennkraftmaschine und Steuerelement |
DE10215672 | 2002-04-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1353055A2 true EP1353055A2 (de) | 2003-10-15 |
EP1353055A3 EP1353055A3 (de) | 2004-08-18 |
Family
ID=28051232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02028307A Withdrawn EP1353055A3 (de) | 2002-04-10 | 2002-12-17 | Verfahren zum Betreiben einer Brennkraftmaschine, Brennkraftmaschine und Steuerelement |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1353055A3 (de) |
DE (1) | DE10215672A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012023749A1 (de) * | 2012-12-04 | 2014-06-05 | Messer Austria Gmbh | Vorrichtung und Verfahren zum Erfassen und Regeln des Mengendurchflusses eines fluiden Mediums in einer Regelstrecke |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19740970A1 (de) * | 1997-04-01 | 1998-10-08 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
DE19844086A1 (de) * | 1998-09-25 | 1999-11-18 | Siemens Ag | Einrichtung zum Steuern einer Brennkraftmaschine |
DE19928560A1 (de) * | 1999-06-22 | 2000-12-28 | Bayerische Motoren Werke Ag | Drehmomentregelsystem für Brennkraftmaschinen in Kraftfahrzeugen mit einer Betätigungsvorrichtung zur variablen Ventilsteuerung |
US6189512B1 (en) * | 1998-09-07 | 2001-02-20 | Nissan Motor Co., Ltd. | Variable valve timing engine |
EP1231372A2 (de) * | 2001-02-13 | 2002-08-14 | MAGNETI MARELLI POWERTRAIN S.p.A. | Verfahren zur Schätzung der Zylinderfüllung in einer Brennkraftmaschine |
-
2002
- 2002-04-10 DE DE10215672A patent/DE10215672A1/de not_active Withdrawn
- 2002-12-17 EP EP02028307A patent/EP1353055A3/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19740970A1 (de) * | 1997-04-01 | 1998-10-08 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
US6189512B1 (en) * | 1998-09-07 | 2001-02-20 | Nissan Motor Co., Ltd. | Variable valve timing engine |
DE19844086A1 (de) * | 1998-09-25 | 1999-11-18 | Siemens Ag | Einrichtung zum Steuern einer Brennkraftmaschine |
DE19928560A1 (de) * | 1999-06-22 | 2000-12-28 | Bayerische Motoren Werke Ag | Drehmomentregelsystem für Brennkraftmaschinen in Kraftfahrzeugen mit einer Betätigungsvorrichtung zur variablen Ventilsteuerung |
EP1231372A2 (de) * | 2001-02-13 | 2002-08-14 | MAGNETI MARELLI POWERTRAIN S.p.A. | Verfahren zur Schätzung der Zylinderfüllung in einer Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE10215672A1 (de) | 2003-10-30 |
EP1353055A3 (de) | 2004-08-18 |
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