EP1362173B1 - Verfahren zum ermitteln eines schätzwertes eines massenstroms in den ansaugtrakt einer brennkraftmaschine - Google Patents

Verfahren zum ermitteln eines schätzwertes eines massenstroms in den ansaugtrakt einer brennkraftmaschine Download PDF

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Publication number
EP1362173B1
EP1362173B1 EP01984730A EP01984730A EP1362173B1 EP 1362173 B1 EP1362173 B1 EP 1362173B1 EP 01984730 A EP01984730 A EP 01984730A EP 01984730 A EP01984730 A EP 01984730A EP 1362173 B1 EP1362173 B1 EP 1362173B1
Authority
EP
European Patent Office
Prior art keywords
mass flow
map
mes
manifold pressure
maf
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 - Lifetime
Application number
EP01984730A
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German (de)
English (en)
French (fr)
Other versions
EP1362173A1 (de
Inventor
Wolfgang Stadler
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1362173A1 publication Critical patent/EP1362173A1/de
Application granted granted Critical
Publication of EP1362173B1 publication Critical patent/EP1362173B1/de
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Expired - Lifetime legal-status Critical Current

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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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • 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
    • F02D2200/0406—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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0065—Specific aspects of external EGR control
    • F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow

Definitions

  • the invention relates to a method for determining a Estimate of a mass flow in the intake tract Internal combustion engine.
  • EP 0 886 725 B1 describes a method for determining a Estimated mass flow into the cylinders of an internal combustion engine known. It depends on a measured value a mass flow upstream of a throttle valve in the intake tract, the degree of opening of the throttle valve, the speed, the crankshaft, a measured value of the intake manifold pressure and others Operating variables of the internal combustion engine the estimated value of the Mass flow in the cylinders of the internal combustion engine is determined. This is a dynamic model of the intake tract Internal combustion engine provided.
  • the dynamic model is used in Operation corrects depending on the measured value of the mass flow into the intake tract and from a difference in a measured value and an estimate of intake manifold pressure sent to a regulator is fed and its manipulated variable to correct the dynamic Model of the intake tract is used.
  • the object of the invention is a method for determining an estimate of a mass flow into the intake tract Internal combustion engine to create that even with pulsations of the mass flow in the intake tract has a high precision.
  • An internal combustion engine (FIG. 1) comprises an intake tract 1 preferably with a throttle valve 10 and with an engine block 2, which has a cylinder 20 and a crankshaft 23.
  • a piston 21 and a connecting rod 22 are the cylinder 20 assigned.
  • the connecting rod 22 is with the piston and the crankshaft 23 coupled.
  • a cylinder head 3 is provided in which a valve train is arranged is with at least one inlet valve 30 and one Exhaust valve 31.
  • a fuel injector 33 introduced in the cylinder head 3 in the cylinder head 3 .
  • the fuel injector 33 can also be arranged in the intake tract 1.
  • the Internal combustion engine is shown in Figure 1 with a cylinder. However, it can also comprise several cylinders.
  • an exhaust tract 4 which has an exhaust gas recirculation system 5 is connected to the intake tract 1.
  • an EGR valve 51 is arranged that for Adjustment of the recirculated exhaust gas mass is provided.
  • a mass flow meter in the exhaust gas recirculation 5 be arranged, the exhaust gas recirculation mass flow M_EGR recorded.
  • a control device 6 is provided, the sensors are assigned, which capture different measured variables and each determine the measured value of the measured variable.
  • the control device 6 determined depending on at least one measured variable one or more control signals, each an actuator Taxes.
  • the sensors are a pedal position sensor 71 that has a pedal value of the accelerator pedal 7 detected, a throttle position transmitter 11, which has an opening degree of the throttle valve 10 detects an air mass meter 12, the air mass flow detected and an intake manifold pressure sensor 13, the intake manifold pressure detected in the intake tract 1, a temperature sensor 14, which detects an intake air temperature, a speed sensor 24, which detects the rotational speed of the crankshaft 23, and a temperature sensor 25 that detects a coolant temperature.
  • the actuators each include an actuator and a Actuator.
  • the actuator is an electric motor drive, an electromagnetic drive, piezoelectric drive or another drive known to the person skilled in the art.
  • the Actuators are as a throttle valve 10, as a fuel injector 33 or designed as an EGR valve 51. On the Actuators are assigned below with the respectively Actuator referred.
  • the control device 6 is preferably electronic Engine control trained. However, it can also have several Control devices that are electrically conductive with each other are connected so. B. via a bus system.
  • MAF_MES is the measured value of the mass flow in the intake tract designated, which is detected by the mass flow meter 12
  • M_EGR is the exhaust gas recirculation mass flow that either detected by the mass flow sensor in the exhaust gas recirculation 5 is calculated or using a model as an estimate is
  • MAF_CYL a mass flow in the cylinder 2 of the Denote internal combustion engine, preferably by means of a dynamic model of the intake tract is determined as it is described for example in EP 0 886 725 B1 and their Content is hereby included.
  • the mass flow MAF_MAN is within a summing point S1 of intake tract 1 corrected additively with the correction value COR, which is described in detail below.
  • MAP_EST R VOL ⁇ TIA ⁇ MASS_MAN
  • R denotes the general gas constant
  • VOL the volume of the intake tract downstream of the throttle valve to the inlet to the cylinders of the internal combustion engine
  • TIA the intake air temperature or the temperature of the mass flow downstream of the throttle valve 10.
  • the difference of the measured value is in a summing point S2 MAP_MES and the estimated value MAP_EST of the intake manifold pressure are formed.
  • the difference is then integrated in a block B4 and the integrated values then lead to the summing point S3.
  • a value that is characteristic is determined in a block B5 is for changing the measured value MAP_MES of the intake manifold pressure. This is preferably done in block B5 Time derivation of the measurement value MAP_MES of the intake manifold pressure determined. This is then the input variable of a map, by means of which a correction factor FAC is determined in block B6 becomes. The difference is in a multiplier M1 the measured value MAP_MES and the estimated value MAP_EST of the intake manifold pressure multiplied by the correction factor FAC. This Value is then led to the summing point S3 and to the integral, that is determined in block B4 is added. This then gives the correction value COR.
  • Blocks B2, B3, B4, B5, B6 thus form a control loop, whose command variable is the measured value MAP_MES of the intake manifold pressure whose controlled variable is the estimated value MAP_EST of the intake manifold pressure whose manipulated variable is the correction value COR, the again the correction is made with the mass flow MAF_MAN within of the intake tract 1 and thus the corrected mass flow MAF_MAN_COR forms within the intake tract 1.
  • the correction factor FAC is there through tests on an engine test bench or determined in advance by simulations and in the characteristic curve stored.
  • the MAF_EST estimate may even be in an alternative embodiment without the mass flow MAF_MAN within the intake tract be determined. This is simply the mass flow MAF_MAN within the intake tract to the value zero set, which corresponds to an omission of block B1. So can also be simplified without the calculations in the block B1 a sufficiently precise estimate MAF_EST of the mass flow be determined in the intake tract.
  • An inclusion of block B1 has the advantage, however, that through the calculation of the mass flow MAF_MAN within the intake tract in block B1 a rough working point determination for the control loop in the sense of a feedforward control and thus faster a precise estimate MAF_EST of the mass flow into the intake tract is made available, which in particular at an essential driving operation of the internal combustion engine Advantage is.
  • the calculation of the integral of the measured value MAP_MES and the Estimation MAP_EST of the intake manifold pressure has the advantage that a higher stationary accuracy of the estimated value MAF_EST is guaranteed. However, it can be in a simpler embodiment can also be omitted.
  • the MAF_EST estimate of the mass flow can then be used for further Calculation of control signals for actuators of the internal combustion engine or can also be used for diagnosis.
EP01984730A 2001-01-23 2001-12-27 Verfahren zum ermitteln eines schätzwertes eines massenstroms in den ansaugtrakt einer brennkraftmaschine Expired - Lifetime EP1362173B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10102914 2001-01-23
DE10102914A DE10102914C1 (de) 2001-01-23 2001-01-23 Verfahren zum Ermitteln eines Schätzwertes eines Massenstroms in den Ansaugtrakt einer Brennkraftmaschine
PCT/DE2001/004929 WO2002059471A1 (de) 2001-01-23 2001-12-27 Verfahren zum ermitteln eines schätzwertes eines massenstroms in den ansaugtrakt einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1362173A1 EP1362173A1 (de) 2003-11-19
EP1362173B1 true EP1362173B1 (de) 2004-07-21

Family

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EP01984730A Expired - Lifetime EP1362173B1 (de) 2001-01-23 2001-12-27 Verfahren zum ermitteln eines schätzwertes eines massenstroms in den ansaugtrakt einer brennkraftmaschine

Country Status (4)

Country Link
US (1) US6985806B2 (pl)
EP (1) EP1362173B1 (pl)
DE (2) DE10102914C1 (pl)
WO (1) WO2002059471A1 (pl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046504A1 (de) * 2005-09-29 2007-04-05 Bayerische Motoren Werke Ag Vorrichtung zur druckbasierten Lasterfassung
DE102007023850B3 (de) * 2007-05-23 2008-08-21 Siemens Ag Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4029739B2 (ja) * 2003-02-05 2008-01-09 トヨタ自動車株式会社 内燃機関における充填空気量演算
JP4565065B2 (ja) * 2003-03-03 2010-10-20 典孝 松尾 エンジンの吸入空気流量計測装置
US7273046B2 (en) * 2004-07-09 2007-09-25 Denso Corporation Air-fuel ratio controller for internal combustion engine and diagnosis apparatus for intake sensors
US7139656B1 (en) * 2005-12-14 2006-11-21 Gm Global Technology Operations, Inc. Mass airflow rate per cylinder estimation without volumetric efficiency map
DE102006035096B4 (de) * 2006-07-28 2014-07-03 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
EP2098710B1 (en) * 2008-03-04 2016-07-27 GM Global Technology Operations LLC A method for estimating the oxygen concentration in internal combustion engines
US8650011B2 (en) * 2010-12-17 2014-02-11 Delphi Technologies, Inc. Method for determining an engine response characteristic
WO2013109257A1 (en) * 2012-01-18 2013-07-25 International Engine Intellectual Property Company, Llc Mass airflow sensor calibration evaluation

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JPH025734A (ja) * 1988-06-24 1990-01-10 Hitachi Ltd 内燃機関用補助空気供給装置の制御方法
DE3938898A1 (de) * 1989-11-24 1991-05-29 Sartorius Gmbh Verfahren und vorrichtung zum pulsationsfreien kontinuierlichen gravimetrischen dosieren
US5094213A (en) * 1991-02-12 1992-03-10 General Motors Corporation Method for predicting R-step ahead engine state measurements
JPH04311643A (ja) * 1991-04-10 1992-11-04 Hitachi Ltd エンジンの気筒流入空気量算出方法
JPH09228884A (ja) * 1996-02-20 1997-09-02 Toyota Motor Corp 内燃機関の制御装置
DE59700375D1 (de) * 1996-03-15 1999-09-30 Siemens Ag Verfahren zum modellgestützten bestimmen der in die zylinder einer brennkraftmaschine einströmenden frischluftmasse bei externer abgasrückführung
DE19615542C2 (de) * 1996-04-19 1998-05-07 Daimler Benz Ag Einrichtung zur Motorlastbestimmung für einen Verbrennungsmotor
DE19825305A1 (de) * 1998-06-05 1999-12-09 Bayerische Motoren Werke Ag Verfahren zur Korrektur der durch ein Saugrohr angesaugten und im Saugrohr gemessenen Luftmasse eines Verbrennungsmotors
DE19844637C1 (de) * 1998-09-29 1999-10-14 Siemens Ag Einrichtung zum Steuern einer Brennkraftmaschine
US6697729B2 (en) * 2002-04-08 2004-02-24 Cummins, Inc. System for estimating NOx content of exhaust gas produced by an internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046504A1 (de) * 2005-09-29 2007-04-05 Bayerische Motoren Werke Ag Vorrichtung zur druckbasierten Lasterfassung
US7546760B2 (en) 2005-09-29 2009-06-16 Bayerische Motoren Werke Aktiengesellschaft Device for pressure-based load detection
DE102007023850B3 (de) * 2007-05-23 2008-08-21 Siemens Ag Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine

Also Published As

Publication number Publication date
US20050021215A1 (en) 2005-01-27
DE10102914C1 (de) 2002-08-08
WO2002059471A1 (de) 2002-08-01
US6985806B2 (en) 2006-01-10
EP1362173A1 (de) 2003-11-19
DE50102950D1 (de) 2004-08-26

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