DE10352572B4 - Method for determining a mean amplitude of air mass oscillations - Google Patents
Method for determining a mean amplitude of air mass oscillations Download PDFInfo
- Publication number
- DE10352572B4 DE10352572B4 DE10352572A DE10352572A DE10352572B4 DE 10352572 B4 DE10352572 B4 DE 10352572B4 DE 10352572 A DE10352572 A DE 10352572A DE 10352572 A DE10352572 A DE 10352572A DE 10352572 B4 DE10352572 B4 DE 10352572B4
- Authority
- DE
- Germany
- Prior art keywords
- air mass
- oscillations
- mean
- amplitude
- mass oscillations
- 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.)
- Expired - Fee Related
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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
- F02D23/02—Controlling engines characterised by their being supercharged the engines being of fuel-injection type
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/16—Other safety measures for, or other control of, pumps
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Verfahren
zur Ermittlung einer mittleren Amplitude (E) von Luftmassenschwingungen
zur Steuerung eines Soll-Ladedrucks einer Aufladeeinrichtung für einen
Verbrennungsmotor, insbesondere eines Abgasturboladers für einen
Dieselmotor eines Kraftfahrzeugs, wobei
a. die Luftmassenschwingungen
(A) im Ansaugweg der Aufladeeinrichtung erfasst werden,
b.
aus den Luftmassenschwingungen (A) ein erster Mittelwert (B) gebildet
wird,
c. aus dem ersten Mittelwert (B) und den Luftmassenschwingungen
(A) ein Differenzsignal (C) gebildet wird,
d. das Differenzsignal
(C) gleichgerichtet wird,
e. aus dem gleichgerichteten Differenzsignal
(D) ein zweiter Mittelwert als Maß für die mittlere Amplitude (E)
der Luftmassenschwingungen gebildet wird und
f. abhängig von
der Differenz aus der mittleren Amplitude (E) der Luftmassenschwingungen
und einer vorgegebenen mittleren Soll-Amplitude (SA) der Luftmassenschwingungen
ein Korrekturfaktor (K) zur Korrektur eines Soll-Ladedrucks der
Aufladeeinrichtung ermittelt wird.Method for determining a mean amplitude (E) of air mass oscillations for controlling a desired charge pressure of a charging device for an internal combustion engine, in particular an exhaust gas turbocharger for a diesel engine of a motor vehicle, wherein
a. the air mass oscillations (A) are detected in the intake path of the charging device,
b. from the air mass oscillations (A) a first mean value (B) is formed,
c. a difference signal (C) is formed from the first mean value (B) and the air mass oscillations (A),
d. the difference signal (C) is rectified,
e. from the rectified difference signal (D) a second average is formed as a measure of the mean amplitude (E) of the air mass oscillations, and
f. Depending on the difference between the mean amplitude (E) of the air mass oscillations and a predetermined mean desired amplitude (SA) of the air mass oscillations, a correction factor (K) for correcting a desired charge pressure of the charging device is determined.
Description
Die Erfindung bezieht sich auf ein Verfahren zur Ermittlung der Amplitude von Luftmassenschwingungen zur Steuerung einer Aufladeeinrichtung für einen Verbrennungsmotor, insbesondere eines Abgasturboladers für einen Dieselmotor eines Kraftfahrzeugs.The The invention relates to a method for determining the amplitude of air mass oscillations for controlling a charging device for one Internal combustion engine, in particular an exhaust gas turbocharger for a Diesel engine of a motor vehicle.
Ladedrucksteuerungen sind seit langem bekannt. Durch ein Überschreiten eines kritischen Druckverhältnisses zwischen dem Druck vor der Aufladeeinheit und dem Druck nach der Aufladeeinheit kann es innerhalb der Aufladeeinheit zu einem pumpenden Rückströmen der verdichteten Luft auf die Ansaugseite der Aufladeeinheit bzw. des Verdichters kommen. Dieser Effekt ist der sog. Pump-Effekt oder Surging-Effekt. Durch das pumpende Rückströmen der Luft werden Druckschwingungen in der Ansaugluft verursacht, die zu erhöhten Geräuschemissionen und Bauteilebelastungen der Aufladeeinrichtung und der Luftführungsteile führen.Boost pressure control have been known for a long time. By exceeding a critical pressure ratio between the pressure in front of the charger and the pressure after the Charger can pump it to a pumping within the charger Backflow of the compressed air on the suction side of the charger or the Compressor come. This effect is the so-called pump effect or surging effect. By the pumping backflow of the Air pressure oscillations are caused in the intake air, the to increased Noise emissions and Component loads of the charging device and the air guide parts to lead.
Aus
der
Weiter
ist aus der
Schließlich ist
aus der
Aus
der
Aus
der
Aufgabe der Erfindung ist, ein Verfahren anzugeben, welches den Soll-Ladedruck der Aufladeeinrichtung abhängig von den Luftmassenschwingungen steuert.task The invention is to provide a method which the target boost pressure of the charging device dependent of the air mass oscillations.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren nach Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen sind die Gegenstände der abhängigen Ansprüche.These The object is achieved by a Method according to claim 1 solved. Advantageous developments are the objects the dependent Claims.
Das erfindungsgemäße Verfahren zur Ermittlung einer mittleren Amplitude von Luftmassenschwingungen zur Steuerung eines Soll-Ladedrucks einer Aufladeeinrichtung für einen Verbrennungsmotor, insbesondere eines Abgasturboladers für einen Dieselmotor eines Kraftfahrzeugs ist durch folgende Schritte gekennzeichnet:
- a) Erfassen der Luftmassenschwingungen im Ansaugweg der Aufladeeinrichtung,
- b) Bilden eines ersten Mittelwertes aus den Luftmassenschwingungen,
- c) Bilden eines Differenzsignals aus dem ersten Mittelwert und den Luftmassenschwingungen,
- d) Gleichrichten des Differenzsignals,
- e) Bilden eines zweiten Mittelwertes aus dem gleichgerichteten Differenzsignal als Maß für die mittlere Amplitude der Luftmassenschwingungen und
- f) Ermitteln eines Korrekturfaktors zur Korrektur eines Soll-Ladedrucks abhängig von der Differenz aus der mittleren Amplitude der Luftmassenschwingungen und einer vorgegebenen mittleren Soll-Amplitude der Luftmassenschwingungen.
- a) detecting the air mass oscillations in the intake path of the charging device,
- b) forming a first mean value from the air mass oscillations,
- c) forming a difference signal from the first mean value and the air mass oscillations,
- d) rectification of the difference signal,
- e) forming a second mean value from the rectified difference signal as a measure of the mean amplitude of the air mass oscillations and
- f) determining a correction factor for correcting a target boost pressure as a function of the difference between the mean amplitude of the air mass oscillations and a predetermined average desired amplitude of the air mass oscillations.
Das Verfahren dient der Vermeidung von Pump-Effekten bei Aufladeeinrichtungen und führt damit zu einer wesentlichen Verbesserung der Geräusch-Emissionen und der Bauteile-Lebensdauer der Aufladeeinrichtung und der Luftführungsteile. Die Luftmassenschwingungen werden durch einen bereits im Fahrzeug vorhandenen Lustmassenmesser detektiert. Durch die erfindungsgemäße Auswertung der Luftmassenschwingungen wird ein Maß für die mittlere Amplitude der Luftmassenschwingungen erzeugt, das wiederum ein Maß für das Pumpen im Ansaugweg der Aufladeeinrichtung darstellt. Das Verfahren wird vorzugsweise in einem bereits vorhandenen elektronischen Steuergerät durchgeführt.The method serves to avoid pumping effects in charging devices and thus leads to a significant improvement of the noise emissions and the component life of the charging device and the air guide parts. The air mass vibrations are detected by an already existing in the vehicle pleasure mass meter. The inventive evaluation of the air mass oscillations produces a measure of the mean amplitude of the air mass oscillations, which in turn represents a measure of the pumping in the intake path of the charging device. The process is preferably in an already existing NEN electronic control unit performed.
Vorteilhafterweise kann der erste Mittelwert mittels eines ersten Tiefpasses mit einer großen ersten Zeitkonstante und der zweite Mittelwert mittels eines Tiefpasses mit einer großen zweiten Zeitkonstante gebildet werden.advantageously, the first mean value can be determined by means of a first low pass with a huge first time constant and the second mean by means of a low pass with a big one second time constant are formed.
Der erste und zweite Tiefpass, sowie die erste und zweite Zeitkonstante können verschieden voneinander sein. Durch das Filtern mittels der Tiefpässe werden aus den Eingangssignalen also aus den Luftmassenschwingungen bzw. aus dem gleichgerichteten Differenzsignal, die Mittelwerte der Eingangsignale gebildet.Of the first and second low pass, as well as the first and second time constants can be different from each other. By filtering by means of low passes from the input signals so from the air mass oscillations or from the rectified differential signal, the mean values of the input signals educated.
Vorteilhafterweise kann die Soll-Amplitude der Luftmassenschwingungen von der Drehzahl des Verbrennungsmotors und/oder der Kraftstoffeinspritzmenge und/oder dem atmosphärischen Luftdruck und/oder der Ansauglufttemperatur abhängig sein. Die vorgegebene Soll-Amplitude der Luftmassenschwingungen wird aus einem Kennfeld bzw. einer Kennlinie, in dem abhängig von der Drehzahl des Verbrennungsmotors und möglicherweise anderen Parametern (Kraftstoffeinspritzmenge, atmosphärischer Luftdruck, Ansauglufttemperatur) unterschiedliche Soll-Amplituden der Luftmassenschwingungen abgelegt sind, ermittelt.advantageously, can the desired amplitude of the air mass vibrations of the speed the internal combustion engine and / or the fuel injection quantity and / or the atmospheric Be dependent on air pressure and / or the intake air temperature. The default Target amplitude of the air mass vibrations is from a map or a characteristic curve in which depends from the speed of the internal combustion engine and possibly other parameters (Fuel injection amount, atmospheric air pressure, intake air temperature) stored different desired amplitudes of the air mass oscillations are determined.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigtIn the drawing is an embodiment of Invention shown. It shows
In
Von
dem ursprünglichen
Signal der Luftmassenschwingungen A wird das Signal des ersten Mittelwertes
B gemäß
Das
gleichgerichtete Differenzsignal D wird gemäß
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10352572A DE10352572B4 (en) | 2003-11-11 | 2003-11-11 | Method for determining a mean amplitude of air mass oscillations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10352572A DE10352572B4 (en) | 2003-11-11 | 2003-11-11 | Method for determining a mean amplitude of air mass oscillations |
Publications (2)
Publication Number | Publication Date |
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DE10352572A1 DE10352572A1 (en) | 2005-06-09 |
DE10352572B4 true DE10352572B4 (en) | 2005-11-24 |
Family
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DE10352572A Expired - Fee Related DE10352572B4 (en) | 2003-11-11 | 2003-11-11 | Method for determining a mean amplitude of air mass oscillations |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004036553B3 (en) | 2004-07-28 | 2006-01-05 | Bayerische Motoren Werke Ag | Reporting process for mean amplitude of air mass oscillations involves detecting air mass signal, reporting its gradient, producing two mean values and difference signal |
FR2924469A3 (en) * | 2007-12-04 | 2009-06-05 | Renault Sas | Air recirculating method for over supplied internal combustion engine, involves recirculating portion of air in downstream of compressor towards upstream of compressor, in case of detection of compressor pumping phenomenon |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2441804A1 (en) * | 1974-08-31 | 1976-03-11 | Daimler Benz Ag | IN PARTICULAR COMBUSTION ENGINE WORKING IN ACCORDANCE WITH THE OTTO PROCESS, PREFERABLY COMBUSTION VEHICLE ENGINEERING |
EP0575635B1 (en) * | 1992-05-27 | 1998-01-07 | Siemens Aktiengesellschaft | Measurement of the pulsating air mass flow in the intake duct of an internal combustion engine |
DE19936269C2 (en) * | 1999-07-31 | 2001-08-30 | Bayerische Motoren Werke Ag | Method and device for controlling a manipulated variable for controlling an adjustable motor vehicle component |
DE10010978A1 (en) * | 2000-03-07 | 2001-09-20 | Bosch Gmbh Robert | Method and device for regulating boost pressure of IC engine |
DE10062350A1 (en) * | 2000-12-14 | 2002-06-20 | Daimler Chrysler Ag | Regulation method esp. for exhaust gas turbocharger for Diesel engines with pre-adjustment and adjustment correction of turbocharger dependent upon actual injected fuel volume, and with intake path air flow used as control input |
-
2003
- 2003-11-11 DE DE10352572A patent/DE10352572B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2441804A1 (en) * | 1974-08-31 | 1976-03-11 | Daimler Benz Ag | IN PARTICULAR COMBUSTION ENGINE WORKING IN ACCORDANCE WITH THE OTTO PROCESS, PREFERABLY COMBUSTION VEHICLE ENGINEERING |
EP0575635B1 (en) * | 1992-05-27 | 1998-01-07 | Siemens Aktiengesellschaft | Measurement of the pulsating air mass flow in the intake duct of an internal combustion engine |
DE19936269C2 (en) * | 1999-07-31 | 2001-08-30 | Bayerische Motoren Werke Ag | Method and device for controlling a manipulated variable for controlling an adjustable motor vehicle component |
DE10010978A1 (en) * | 2000-03-07 | 2001-09-20 | Bosch Gmbh Robert | Method and device for regulating boost pressure of IC engine |
DE10062350A1 (en) * | 2000-12-14 | 2002-06-20 | Daimler Chrysler Ag | Regulation method esp. for exhaust gas turbocharger for Diesel engines with pre-adjustment and adjustment correction of turbocharger dependent upon actual injected fuel volume, and with intake path air flow used as control input |
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Publication number | Publication date |
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DE10352572A1 (en) | 2005-06-09 |
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Legal Events
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OP8 | Request for examination as to paragraph 44 patent law | ||
8125 | Change of the main classification |
Ipc: F02D 4118 |
|
8364 | No opposition during term of opposition | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |