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EP1999352A1 - Method and device for regulating or controlling a compressor of an exhaust gas turbocharger - Google Patents

Method and device for regulating or controlling a compressor of an exhaust gas turbocharger

Info

Publication number
EP1999352A1
EP1999352A1 EP07723703A EP07723703A EP1999352A1 EP 1999352 A1 EP1999352 A1 EP 1999352A1 EP 07723703 A EP07723703 A EP 07723703A EP 07723703 A EP07723703 A EP 07723703A EP 1999352 A1 EP1999352 A1 EP 1999352A1
Authority
EP
European Patent Office
Prior art keywords
pressure
compressor
measuring
measured
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Withdrawn
Application number
EP07723703A
Other languages
German (de)
French (fr)
Inventor
Alfred Grzonkowski
Volker Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BorgWarner Inc filed Critical BorgWarner Inc
Publication of EP1999352A1 publication Critical patent/EP1999352A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • F02B37/16—Control of the pumps by bypassing charging air
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D23/00—Controlling engines characterised by their being supercharged
    • 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
    • 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
    • F02B2037/122—Control of rotational speed of the pump
    • 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
    • F02D2200/0406—Intake manifold pressure
    • F02D2200/0408—Estimation of 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
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/703—Atmospheric pressure
    • 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

Definitions

  • the invention relates to a method and a device for controlling or controlling the compressor of an exhaust gas turbocharger of an internal combustion engine according to claim 1 or 8.
  • an engine turbocharger control management system in which for controlling the compressor of the turbocharger, a pressure sensor is arranged directly at the inlet of the compressor. Another pressure sensor is provided directly at the outlet of the compressor in the compressor outlet line. Further, a speed sensor is provided which determines the compressor speed, for example by determining the speed of the turbocharger shaft.
  • engine exhaust is partially returned to the compressor inlet line as part of the exhaust gas recirculation.
  • upstream particle filter can not be prevented that particles and exhaust gas condensate get into the compressor inlet line, causing serious measurement problems.
  • a pressure measurement directly at the compressor is a special effort, since the sensor may need to be placed in a difficult to reach place and must be suitable for the prevailing operating conditions there.
  • the solution of this object is achieved by the features of claim 1 and claim 8.
  • the actual compressor pressure ratio can be approximated with sufficient accuracy in a simple manner.
  • the negative pressure in the compressor inlet line and, secondly, the pressure loss in the compressor outlet line can be determined by calculation as a result of the losses of the throttle flap and of the charge air cooler.
  • the data necessary for the calculation of the compressor pressure ratio can be determined in advance specifically for the operating point.
  • the ambient pressure preferably a near-ambient ambient pressure
  • the static pressure of the ambient air instead of a negative pressure of a flowing gas mixture, which is technically much easier and less expensive. This results in a cost-effective, but sufficiently accurate control or control of the compressor in the manner previously explained.
  • the pressure sensor can be attached to the control device or integrated into it, which simplifies the structure of the control system according to the invention.
  • FIGURE of the drawing shows a schematically greatly simplified representation of a control system 1 according to the invention for explaining its structure and for explaining the method according to the invention.
  • the control system 1 according to the invention of a compressor 2 of a turbocharger 3 for an internal combustion engine 4 initially has a control device 5, which can be designed in the usual way.
  • a first pressure sensor 6 is arranged directly on the control unit 5 or integrated therein and serves to measure an ambient pressure Py, preferably a near ambient engine pressure, which is a static pressure of the ambient air. The measurement results in a signal S PU , which is fed to a calculation unit 21 of the control device 5.
  • the control device 1 further comprises a second pressure sensor 7, which is arranged in front of an intake manifold 15 of the internal combustion engine 4, or, alternatively to the illustrated embodiment, may be arranged in the intake manifold 15.
  • This pressure sensor 7 measures a second pressure P v , which represents the pressure of the compressed by the compressor 2 fluid before entering the internal combustion engine 4. That I resulting measurement signal S PV is also supplied to the control unit 5 via a corresponding signal line.
  • a third sensor 8 is provided, which is a speed sensor for determining the compressor speed U.
  • This speed sensor 8 may be either the speed of a shaft 9 connecting the compressor 2 to a turbine 10 of the turbocharger 3, or it may directly control the speed of the compressor wheel or turbine wheel (both not shown in the drawing) by using signals indicative of or by means of markings the blades are generated to be determined.
  • the speed signal can also be used to protect the exhaust turbocharger against overspeeding.
  • the turbine 10 of the turbocharger is connected to an exhaust duct 17 via the exhaust manifold 16 of the engine 4 to be rotated by the supplied engine exhaust gas, thereby driving the compressor wheel of the compressor 2, which however, represents a common construction that need not be further explained for the principles of the present invention.
  • FIG. 19 shows a bypass line 19 with a bypass valve 20, which represent a way to control the compressor 2, which can also be carried out in the usual manner.
  • control unit 5 supplied signals S U ( S PU and S PV the calculation unit 21 of the control unit 5 are evaluated and so the control of the compressor 2 performed according to the respective compressor map, so that the compressor 2 in an optimal operating range of this map can be operated.
  • control strategy also corresponds to conventional principles, to which reference may be made, for example, to the initially described DE 10 2004 059 369 A1, the disclosure of which is hereby made explicit reference to the disclosure of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to a method for regulating or controlling the compressor (2) of an exhaust gas turbocharger (3) of an internal combustion engine (4), having the following method steps: measuring an ambient air pressure (PU); measuring a static pressure (PV) upstream of the engine inlet; measuring the rotational speed (U) of the exhaust gas turbocharger (3); determining a static pressure (PE) which is present directly at the compressor inlet (11) by calculating a vacuum (Pdyn) in the compressor inlet line (11) and subtracting the calculated vacuum (Pdyn) from the measured ambient air pressure (PU); determining a static pressure (PA) which is present directly at the compressor outlet (12) by calculating the pressure loss (PDV) in the compressor outlet line (18) and adding the calculated pressure loss (PDV-) to the measured static pressure (PV); and regulating or controlling the compressor operation corresponding to at least one of the determined pressure values (PE or PA) and the rotational speed signal (SU).

Description

Verfahren und Vorrichtung zur Regelung oder Steuerung eines Verdichters eines Abgas-Turboladers Method and device for controlling or controlling a compressor of an exhaust gas turbocharger
Beschreibungdescription
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Regelung oder Steuerung des Verdichters eines Abgas- Turboladers eines Verbrennungsmotors gemäß Anspruch 1 bzw. 8.The invention relates to a method and a device for controlling or controlling the compressor of an exhaust gas turbocharger of an internal combustion engine according to claim 1 or 8.
Aus der DE 10 2004 059 369 Al ist ein Motor-Turbolader- Steuermanagement-System bekannt, bei dem zur Regelung des Verdichters des Turboladers ein Drucksensor direkt am Eintritt des Verdichters angeordnet ist. Ein weiterer Drucksensor ist direkt am Auslass des Verdichters in der Verdichterauslassleitung vorgesehen. Ferner ist ein Drehzahlsensor vorgesehen, der die Verdichterdrehzahl, beispielsweise durch Ermittlung der Drehzahl der Turboladerwelle, bestimmt.From DE 10 2004 059 369 Al an engine turbocharger control management system is known, in which for controlling the compressor of the turbocharger, a pressure sensor is arranged directly at the inlet of the compressor. Another pressure sensor is provided directly at the outlet of the compressor in the compressor outlet line. Further, a speed sensor is provided which determines the compressor speed, for example by determining the speed of the turbocharger shaft.
Dadurch, dass der Druck des unverdichteten Strömungsmittels unmittelbar am Verdichtereinlass gemessen wird, ergibt sich eine schwierige Druckmessung, da an dieser Stelle nicht nur reine Luft, sondern, wie im Ausführungsbeispiel der DE 10 2004 059 369 Al beschrieben, beispielsweise auch zugeführtes Erdgas mit in der Verdichtereinlassleitung vorhanden ist, so dass die unmittelbar am Verdichtereintritt durchgeführte Druckmessung aufgrund von Druckschwankungen des zugeführten Erdgases häufig verfälscht wird. Ferner wird bei modernen Turboladern Motor- Blowby in die Verdichtereinlassleitung zurückgeführt, das trotz vorgeschalteter Ölfilter häufig noch ölhaltig ist und der vom Verdichter angesaugten reinen Luft beigemischt wird.The fact that the pressure of the uncompacted fluid is measured directly at the compressor inlet, results in a difficult pressure measurement, since at this point not only pure air, but, as in the embodiment of DE 10 2004 059 369 Al described, for example, supplied natural gas is present in the compressor inlet line, so that the pressure measurement performed directly at the compressor inlet is often falsified due to pressure fluctuations of the supplied natural gas. Furthermore, in modern turbochargers, engine blow-by is recirculated to the compressor inlet line, which, in spite of upstream oil filters, is frequently still rich in oil and is admixed with the clean air sucked in by the compressor.
Desweiteren wird Motorabgas im Rahmen der Abgasrückführung teilweise in die Verdichtereinlassleitung zurückgeführt. Trotz vorgeschaltetem Partikelfilter kann nicht verhindert werden, dass Partikel und Abgaskondensat in die Verdichtereinlassleitung gelangen, wodurch gravierende Messprobleme entstehen.In addition, engine exhaust is partially returned to the compressor inlet line as part of the exhaust gas recirculation. Despite upstream particle filter can not be prevented that particles and exhaust gas condensate get into the compressor inlet line, causing serious measurement problems.
In jedem Fall stellt eine Druckmessung unmittelbar am Verdichter einen besonderen Aufwand dar, da der Sensor ggf. an einer schlecht zugänglichen Stelle platziert werden und für die dort herrschenden Betriebsbedingungen geeignet sein muß.In any case, a pressure measurement directly at the compressor is a special effort, since the sensor may need to be placed in a difficult to reach place and must be suitable for the prevailing operating conditions there.
Dies gilt sowohl für die Druckmessung in der Verdichtereinlass- wie auch -auslassleitung. Insbesondere können ungleichförmige Geschwindigkeitsverteilungen infolge Verwirbelungen und/oder geometrischen Unförmigkeiten wie Krümmungen oder unstetigen Querschnittserweiterungen die Druckmessung beeinträchtigen.This applies to both the pressure measurement in the compressor inlet and outlet. In particular, non-uniform velocity distributions due to turbulence and / or geometric deformities such as bends or discontinuous cross-sectional enlargements may affect the pressure measurement.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Verfahren und eine Vorrichtung zur Regelung oder Steuerung des Verdichters eines Abgasturboladers zu schaffen, das auf einfache Art und Weise das tatsächliche Verdichterdruckverhältnis hinreichend genau ermittelt, so dass die Regelung des Betriebsverhaltens des Verdichters im optimalen Bereich des Verdichterkennfeldes verbessert werden kann. Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1 bzw. des Anspruches 8.It is therefore an object of the present invention to provide a method and a device for controlling or controlling the compressor of an exhaust gas turbocharger, which determines the actual compressor pressure ratio sufficiently accurately in a simple manner, so that the regulation of the operating behavior of the compressor in the optimum range of the compressor map can be improved. The solution of this object is achieved by the features of claim 1 and claim 8.
Durch Verwendung einer Umgebungsdruckmessung in Verbindung mit der Druckmessung am Motoreinlass, kann auf einfache Art und Weise das tatsächliche Verdichterdruckverhältnis hinreichend genau angenähert werden. Dazu kann zum einen der Unterdruck in der Verdichtereinlassleitung und zum anderen der Druckverlust in der Verdichterauslassleitung infolge der Verluste der Drosselklappe und des Ladeluftkühlers rechnerisch ermittelt werden. Bei einer vorgegeben Verdichterleitungskonfiguration können die für die Berechnung des Verdichterdruckverhältnises notwendigen Daten im Voraus betriebspunktspezifisch ermittelt werden .By using an ambient pressure measurement in conjunction with the pressure measurement at the engine inlet, the actual compressor pressure ratio can be approximated with sufficient accuracy in a simple manner. For this purpose, on the one hand, the negative pressure in the compressor inlet line and, secondly, the pressure loss in the compressor outlet line can be determined by calculation as a result of the losses of the throttle flap and of the charge air cooler. For a given compressor line configuration, the data necessary for the calculation of the compressor pressure ratio can be determined in advance specifically for the operating point.
Durch die Messung des Umgebungsdruckes, vorzugsweise eines motornahen Umgebungsdruckes, ist es möglich, anstelle eines Unterdruckes eines strömenden Gasgemisches den statischen Druck der Umgebungsluft zu messen, was technisch wesentlich einfacher und kostengünstiger ist. Hieraus ergibt sich eine kostengünstige, aber hinreichend genaue Regelung oder Steuerung des Verdichters in der zuvor erläuterten Weise.By measuring the ambient pressure, preferably a near-ambient ambient pressure, it is possible to measure the static pressure of the ambient air instead of a negative pressure of a flowing gas mixture, which is technically much easier and less expensive. This results in a cost-effective, but sufficiently accurate control or control of the compressor in the manner previously explained.
Die Unteransprüche 2 bis 7 haben vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens der Erfindung zum Inhalt.The dependent claims 2 to 7 have advantageous developments of the method of the invention to the content.
Wird der Umgebungsdruck unmittelbar am Regelgerät gemessen, kann der Drucksensor am Regelgerät angebracht bzw. in diesen integriert werden, was den Aufbau des erfindungsgemäßen Regelsystems vereinfacht.If the ambient pressure is measured directly on the control device, the pressure sensor can be attached to the control device or integrated into it, which simplifies the structure of the control system according to the invention.
Durch die Messung des Drucks des verdichteten Strömungsmittels unmittelbar vor oder in der Einlassleitung des Verbrennungsmotors ist es möglich, eine bereits für die Ladedruckregelung/-Überwachung vorhandene Druckmessung vor dem Motoreinlass zu verwenden. Die vor diesem Messpunkt liegende Drosselklappe und der Ladeluftkühler haben einen signifikant dämpfenden Einfluss auf den Druck des Strömungsmittels, was Druckschwankungen deutlich mindert.By measuring the pressure of the compressed fluid immediately before or in the intake line of the internal combustion engine, it is possible to use an already existing for the boost pressure control / monitoring pressure measurement before the engine inlet. The lying in front of this measuring point Throttle and the intercooler have a significant damping effect on the pressure of the fluid, which significantly reduces pressure fluctuations.
In den Ansprüchen 8 bis 11 ist die erfindungsgemäße Vorrichtung definiert.In claims 8 to 11, the device according to the invention is defined.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert .An embodiment of the invention will be explained in more detail with reference to the drawing.
Die einzige Figur der Zeichnung zeigt eine schematisch stark vereinfachte Darstellung eines erfindungsgemäßen Regelsystems 1 zur Erläuterung dessen Aufbaues und zur Erläuterung des erfindungsgemäßen Verfahrens.The sole FIGURE of the drawing shows a schematically greatly simplified representation of a control system 1 according to the invention for explaining its structure and for explaining the method according to the invention.
Das erfindungsgemäße Regelsystem 1 eines Verdichters 2 eines Turboladers 3 für einen Verbrennungsmotor 4 weist zunächst ein Regelgerät 5 auf, das auf übliche Art und Weise ausgebildet sein kann.The control system 1 according to the invention of a compressor 2 of a turbocharger 3 for an internal combustion engine 4 initially has a control device 5, which can be designed in the usual way.
Bei der in der Figur dargestellten besonders bevorzugten Ausführungsform ist ein erster Drucksensor 6 unmittelbar am Regelgerät 5 angeordnet bzw. in diesem integriert und dient zur Messung eines Umgebungsdrucks Py, vorzugsweise eines motornahen Umgebungsdrucks, der ein statischer Druck der Umgebungsluft ist. Die Messung ergibt ein Signal SPU, das einer Berechnungseinheit 21 des Regelgeräts 5 zugeführt wird.In the particularly preferred embodiment shown in the figure, a first pressure sensor 6 is arranged directly on the control unit 5 or integrated therein and serves to measure an ambient pressure Py, preferably a near ambient engine pressure, which is a static pressure of the ambient air. The measurement results in a signal S PU , which is fed to a calculation unit 21 of the control device 5.
Die erfindungsgemäße Regelvorrichtung 1 weist ferner einen zweiten Drucksensor 7 auf, der vor einer Einlasssammelleitung 15 des Verbrennungsmotors 4 angeordnet ist, oder, alternativ zu der dargestellten Ausführungsform, in der Einlasssammelleitung 15 angeordnet sein kann. Dieser Drucksensor 7 misst einen zweiten Druck Pv, der den Druck des durch den Verdichter 2 verdichteten Strömungsmittels vor dem Eintritt in den Verbrennungsmotor 4 darstellt. Das sich ergebende Messsignal SPV wird ebenfalls dem Regelgerät 5 über eine entsprechende Signalleitung zugeführt.The control device 1 according to the invention further comprises a second pressure sensor 7, which is arranged in front of an intake manifold 15 of the internal combustion engine 4, or, alternatively to the illustrated embodiment, may be arranged in the intake manifold 15. This pressure sensor 7 measures a second pressure P v , which represents the pressure of the compressed by the compressor 2 fluid before entering the internal combustion engine 4. That I resulting measurement signal S PV is also supplied to the control unit 5 via a corresponding signal line.
Ferner ist ein dritter Sensor 8 vorgesehen, der einen Drehzahlsensor zur Bestimmung der Verdichterdrehzahl U ist. Dieser Drehzahlsensor 8 kann entweder die Drehzahl einer den Verdichter 2 mit einer Turbine 10 des Turboladers 3 verbindenden Welle 9 sein oder es kann unmittelbar die Drehzahl des Verdichterrades oder des Turbinenrades (beide in der Zeichnung nicht dargestellt) durch Verwendung von Signalen, die mittels Markierungen oder den Schaufeln erzeugt werden, bestimmt werden.Further, a third sensor 8 is provided, which is a speed sensor for determining the compressor speed U. This speed sensor 8 may be either the speed of a shaft 9 connecting the compressor 2 to a turbine 10 of the turbocharger 3, or it may directly control the speed of the compressor wheel or turbine wheel (both not shown in the drawing) by using signals indicative of or by means of markings the blades are generated to be determined.
Das Drehzahlsignal kann zusätzlich auch als Schutz des Abgas- Turboladers gegen Überdrehzahl verwendet werden.The speed signal can also be used to protect the exhaust turbocharger against overspeeding.
Zur Vervollständigung der Beschreibung ist zu sagen, dass die Turbine 10 des Turboladers mit einer Auslassleitung 17 über die Abgassammelleitung 16 des Verbrennungsmotors 4 mit diesem verbunden ist, um durch das zugeführte Motorabgas in Drehung versetzt zu werden und damit das Verdichterrad des Verdichters 2 anzutreiben, was jedoch eine übliche Konstruktion darstellt, die für die Prinzipien der vorliegenden Erfindung nicht näher erläutert werden muss.To complete the description, the turbine 10 of the turbocharger is connected to an exhaust duct 17 via the exhaust manifold 16 of the engine 4 to be rotated by the supplied engine exhaust gas, thereby driving the compressor wheel of the compressor 2, which however, represents a common construction that need not be further explained for the principles of the present invention.
Ferner zeigt die Figur eine Bypassleitung 19 mit einem Bypassventil 20, welche eine Möglichkeit zur Regelung des Verdichters 2 darstellen, was ebenfalls auf übliche Art und Weise durchgeführt werden kann.Further, the figure shows a bypass line 19 with a bypass valve 20, which represent a way to control the compressor 2, which can also be carried out in the usual manner.
Entsprechend den Prinzipien des erfindungsgemäßen Verfahrens werden die dem Regelgerät 5 zugeführten Signale SU( SPU und SPV der Berechnungseinheit 21 des Regelgeräts 5 ausgewertet und so die Regelung des Verdichters 2 entsprechend dem jeweiligen Verdichterkennfeld durchgeführt, damit der Verdichter 2 in einem optimalen Betriebsbereich dieses Kennfeldes betrieben werden kann .According to the principles of the method according to the invention, the control unit 5 supplied signals S U ( S PU and S PV the calculation unit 21 of the control unit 5 are evaluated and so the control of the compressor 2 performed according to the respective compressor map, so that the compressor 2 in an optimal operating range of this map can be operated.
Die Regelstrategie entspricht ebenfalls üblichen Prinzipien, wozu beispielsweise auf die eingangs erläuterte DE 10 2004 059 369 Al verwiesen werden kann, deren Offenbarung hiermit durch explizite Bezugnahme zur Offenbarung vorliegender Anmeldung gemacht wird. The control strategy also corresponds to conventional principles, to which reference may be made, for example, to the initially described DE 10 2004 059 369 A1, the disclosure of which is hereby made explicit reference to the disclosure of the present application.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Regelsystem/Regelvorrichtung1 control system / control device
2 Verdichter2 compressors
3 Turbolader3 turbochargers
4 Verbrennungsmotor4 internal combustion engine
5 Regelgerät5 control unit
6 Erster Drucksensor6 First pressure sensor
7 Zweiter Drucksensor7 second pressure sensor
8 Drehzahlsensor8 speed sensor
9 Welle9 wave
10 Turbine10 turbine
11 Verdichtereinlass11 compressor inlet
12 Verdichterauslass12 compressor outlet
13 Drosselklappe13 throttle
14 Ladeluftkühler14 intercooler
15 Einlasssammelleitung15 intake manifold
16 Auslasssammelleitung16 exhaust manifold
17 Auslassleitung17 outlet pipe
18 Verdichterauslassleitung18 compressor outlet line
19 Bypassleitung 20 Bypassventil19 Bypass line 20 Bypass valve
21 Berechnungseinheit21 calculation unit
22 Verdichtereinlassleitung Pu Umgebungsluftdruck22 Compressor inlet pipe Pu Ambient air pressure
Pv statischer Druck vor MotoreintrittPv static pressure before engine entry
PE statischer Druck unmittelbar am Verdichtereinlass 11P E static pressure directly at the compressor inlet 11
PA statischer Druck unmittelbar am Verdichterauslass 12P A static pressure directly at the compressor outlet 12
Pdyn Unterdruck (dynamischer Druck) in derPdyn negative pressure (dynamic pressure) in the
Verdichtereinlassleitung 22Compressor inlet line 22
PDV Druckverlust in der Verdichterauslassleitung 18 nachP DV pressure loss in the compressor outlet line 18 after
Drosselklappe 13 und/oder Ladeluftkühler 14 Throttle 13 and / or intercooler 14

Claims

Ansprüche claims
1. Verfahren zur Regelung oder Steuerung des Verdichters (2) eines Abgasturboladers (3) eines Verbrennungsmotors (4) mit folgenden Verfahrensschritten:1. A method for controlling or controlling the compressor (2) of an exhaust gas turbocharger (3) of an internal combustion engine (4) with the following method steps:
Messen eines Umgebungsluftdrucks (P0) und Übersenden eines den Umgebungsluftdruck (P0) repräsentierenden Signals (SPU) an ein Steuer-/Regelgerät (5) ; Messen eines statischen Druckes (Pv) vor dem Motoreintritt und Übersenden eines den Druck (Pv) repräsentierenden Signals (SPV) an das Steuer- /Regelgerät (5) ;Measuring an ambient air pressure (P 0 ) and transmitting a signal (S PU ) representing the ambient air pressure (P 0 ) to a control unit (5); Measuring a static pressure (P v ) before the engine entry and transmitting a signal (S PV ) representing the pressure (P v ) to the control unit (5);
Messen der Drehzahl (U) des Abgasturboladers (3) und Übersenden eines den Drehzahlwert (U) repräsentierenden Signals (SPU) an das Steuer- /Regelgerät (5);Measuring the rotational speed (U) of the exhaust gas turbocharger (3) and transmitting a signal (S PU ) representing the rotational speed value (U) to the control / regulating device (5);
Ermittlung eines unmittelbar am Verdichtereinlass (11) vorliegenden statischen Drucks (PE) durch Berechnen eines Unterdrucks (Pdyn) in der Verdichtereinlassleitung (11) und Subtraktion des berechneten Unterdrucks (Pdyn) vom gemessenen Umgebungsluftdruck (P0) ;Determining a static pressure (P E ) present directly at the compressor inlet (11) by calculating a negative pressure (Pdyn) in the compressor inlet line (11) and subtracting the calculated negative pressure (P d yn) from the measured ambient air pressure (P 0 );
Ermitteln eines unmittelbar am Verdichterauslass (12) vorliegenden statischen Drucks (PA) durch Berechnen des Druckverlustes (PDV) in der Verdichterauslassleitung (18) und Addition des berechneten Druckverlusts (PDV) zum gemessenen statischen Druck (Pv) ; und Regeln oder Steuern des Verdichterbetriebs durch das Steuer-/Regelgerät (5) entsprechend zumindest eines der ermittelten Druckwerte (PE bzw. PA) und des Drehzahlsignals (S0) .Determining a static pressure (P A ) present directly at the compressor outlet (12) by calculating the pressure loss (P DV ) in the compressor outlet line (18) and adding the calculated pressure loss (P DV ) to the measured static pressure (P v ); and controlling or controlling the compressor operation by the control / regulating device (5) corresponding to at least one of the determined pressure values (P E or P A ) and the rotational speed signal (S 0 ).
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Umgebungsluftdruck (Pu) unmittelbar am Regelgerät (5) gemessen wird. 2. The method according to claim 1, characterized in that the ambient air pressure (Pu) is measured directly on the control unit (5).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Druck des verdichteten Strömungsmittels unmittelbar vor der Einlasssammelleitung (15) des Verbrennungsmotors (4) gemessen wird.3. The method according to claim 1 or 2, characterized in that the pressure of the compressed fluid immediately before the intake manifold (15) of the internal combustion engine (4) is measured.
4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Druck des verdichteten Strömungsmittels in der Einlasssammelleitung (15) des Verbrennungsmotors (4) gemessen wird.4. The method according to claim 1 or 2, characterized in that the pressure of the compressed fluid in the intake manifold (15) of the internal combustion engine (4) is measured.
5. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Druck des verdichteten Strömungsmittels zwischen der Drosselklappe (13) und dem Ladeluftkühler (14) des Verbrennungsmotors (4) gemessen wird.5. The method according to claim 1 or 2, characterized in that the pressure of the compressed fluid between the throttle valve (13) and the charge air cooler (14) of the internal combustion engine (4) is measured.
6. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Druck des verdichteten Strömungsmittels in der Verdichterauslassleitung (18) vor der Drosselklappe (13) gemessen wird.6. The method according to claim 1 or 2, characterized in that the pressure of the compressed fluid in the compressor outlet (18) before the throttle valve (13) is measured.
7. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass als Druckmessstelle des verdichteten Strömungsmittels identisch eine bereits vorhandene konventionelle Messstelle für die Ladedruckregelung verwendet wird.7. The method according to claim 1 or 2, characterized in that identical as an existing pressure measuring point of the compressed fluid an existing conventional measuring point for the boost pressure control is used.
8. Vorrichtung (1) zur Regelung oder Steuerung8. Device (1) for regulation or control
- mit einem ersten Drucksensor (6), der zur Messung eines Umgebungsluftdruckes (P0) vor dem Verdichtereinlass (11) angeordnet ist,- With a first pressure sensor (6), which is arranged to measure an ambient air pressure (P 0 ) in front of the compressor inlet (11),
- mit einem zweiten Drucksensor (7) zur Messung eines statischen Druckes (Pv) vor dem Verbrennungsmotoreintritt ,with a second pressure sensor (7) for measuring a static pressure (P v ) before the engine inlet,
mit einem Drehzahlsensor (8) zur Messung der Drehzahl des Abgasturboladers (3), und - mit einem Steuer-/Regelgerät (5), das eine Berechnungseinheit (21) zur Ermittlung eines statischen Druckes (PE) des unverdichteten Strömungsmittels unmittelbar am Verdichtereinlass (11) und zur Ermittlung eines statischen Druckes (PA) unmittelbar am Verdichterauslass (12) aufweist.with a speed sensor (8) for measuring the rotational speed of the exhaust gas turbocharger (3), and with a control unit (5) having a calculation unit (21) for determining a static pressure (P E ) of the uncompacted fluid directly at the compressor inlet (11) and for determining a static pressure (P A ) directly at the compressor outlet (12 ) having.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass der erste Drucksensor (6) unmittelbar am Regelgerät (5) angeordnet ist.9. Apparatus according to claim 8, characterized in that the first pressure sensor (6) is arranged directly on the control device (5).
10. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der zweite Drucksensor (7) zwischen einem Ladeluftkühler (14) und der Einlasssammelleitung (15) des Verbrennungsmotors (4) angeordnet ist.10. The device according to claim 8 or 9, characterized in that the second pressure sensor (7) between a charge air cooler (14) and the intake manifold (15) of the internal combustion engine (4) is arranged.
11. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der zweite Drucksensor (7) in der Einlasssammelleitung (15) des Verbrennungsmotors (4) angeordnet ist. 11. The device according to claim 8 or 9, characterized in that the second pressure sensor (7) in the intake manifold (15) of the internal combustion engine (4) is arranged.
EP07723703A 2006-03-29 2007-03-28 Method and device for regulating or controlling a compressor of an exhaust gas turbocharger Withdrawn EP1999352A1 (en)

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PCT/EP2007/002758 WO2007112911A1 (en) 2006-03-29 2007-03-28 Method and device for regulating or controlling a compressor of an exhaust gas turbocharger

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