EP1362173A1 - Method for determining an estimated value of a mass flow in the intake passage of an internal combustion engine - Google Patents
Method for determining an estimated value of a mass flow in the intake passage of an internal combustion engineInfo
- Publication number
- EP1362173A1 EP1362173A1 EP01984730A EP01984730A EP1362173A1 EP 1362173 A1 EP1362173 A1 EP 1362173A1 EP 01984730 A EP01984730 A EP 01984730A EP 01984730 A EP01984730 A EP 01984730A EP 1362173 A1 EP1362173 A1 EP 1362173A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- map
- mass flow
- estimated value
- mes
- est
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 10
- 230000002123 temporal effect Effects 0.000 claims abstract description 4
- 238000012937 correction Methods 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 4
- 238000004364 calculation method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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 an estimated value of a mass flow in the intake tract of an internal combustion engine.
- a method for determining an estimated value of a mass flow into the cylinders of an internal combustion engine is known from EP 0 886 725 B1.
- the estimated value of the mass flow into the cylinders of the internal combustion engine is determined.
- a dynamic model of the intake tract of the internal combustion engine is provided.
- the dynamic model is corrected in operation depending on the measured value of the mass flow into the intake tract and on a difference between a measured value and an estimated value of the intake manifold pressure, which is fed to a controller and whose manipulated variable is used to correct the dynamic model of the intake tract.
- the object of the invention is to create a method for determining an estimated value of a mass flow in the intake tract of an internal combustion engine, which has high precision even in the event of pulsations of the mass flow in the intake tract.
- FIG. 1 shows an internal combustion engine with a control device
- FIG. 2 is a block diagram of a part of the control device relevant to the invention
- 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 assigned to the cylinder 20.
- the connecting rod 22 is coupled to the piston and the crankshaft 23.
- a cylinder head 3 is provided, in which a valve train is arranged with at least one inlet valve 30 and one outlet valve 31.
- a fuel injector 33 is also introduced 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 FIG. 1 with a cylinder. However, it can also comprise several cylinders.
- an exhaust tract 4 is provided, which is connected to the intake tract 1 via an exhaust gas recirculation 5.
- An EGR valve 51 is arranged in the exhaust gas recirculation 5 and is provided for setting the recirculated exhaust gas mass. overall if necessary, a mass flow meter can also be arranged in the exhaust gas recirculation 5, which detects an exhaust gas recirculation mass flow M_EGR.
- control device 6 is provided, to which sensors are assigned, which record different measured variables and each determine the measured value of the measured variable.
- the control device 6 determines one or more control signals depending on at least one measured variable, each of which controls an actuator.
- the sensors are a pedal position sensor 71, which detects a pedal value of the accelerator pedal 7, a throttle valve position sensor 11, which detects an opening degree of the throttle valve 10, an air mass meter 12, which detects an air mass flow, and an intake manifold pressure sensor 13, which detects an intake manifold pressure in the intake tract 1
- Temperature sensor 14 which detects an intake air temperature
- a speed sensor 24 which detects the speed of the crankshaft 23, and a temperature sensor 25, which detects a coolant temperature.
- any subset of the sensors mentioned or additional sensors can be present.
- the actuators each include an actuator and an actuator.
- the actuator is an electromotive drive, an electromagnetic drive, piezoelectric drive or another drive known to the person skilled in the art.
- the actuators are designed as a throttle valve 10, as a fuel injector 33 or as an EGR valve 51. On the
- Actuators are referred to below with the respectively assigned actuator.
- the control device 6 is preferably designed as an electronic engine control. However, it can also comprise several control devices which are connected to one another in an electrically conductive manner, for. B. via a bus system.
- a MAF_MAN within the intake tract 1 is determined with the following relationship:
- MAF_MAN MAF_MES + M_EGR - MAF_CYL
- MAF_MES denotes the measured value of the mass flow in the intake tract, which is detected by the mass flow meter 12
- M_EGR the exhaust gas recirculation mass flow, which is either detected by the mass flow sensor in the exhaust gas recirculation 5 or is calculated as an estimated value using a model
- MAF_CYL a mass flow in denote the cylinders 2 of the internal combustion engine, which is preferably determined by means of a dynamic model of the intake tract, as is described, for example, in EP 0 886 725 B1 and the content of which is hereby included.
- the mass flow MAF_MAN within the intake tract 1 is corrected additively with the correction value COR, which is described in detail below.
- a gas mass MASS_MAN within the intake tract 1 is determined as a function of the corrected mass flow MAF_MAN_COR by integrating the corrected mass flow MAF_MAN_COR over time.
- R denotes the general gas constant
- VOL the volume of the intake tract downstream of the throttle valve up 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.
- a value is determined which is characteristic of the change in the measured value MAP_MES of the intake manifold pressure.
- the time derivative of the measured value MAP_MES of the intake manifold pressure is preferably determined in block B5.
- a correction factor FAC is determined in block B6.
- a multiplier M1 the difference between the measured value MAP_MES and the estimated value MAP_EST of the intake manifold pressure is multiplied by the correction factor FAC.
- This value is then led to the summing point S3 and added to the integral that is determined in block B4. This then gives the correction value COR.
- an estimate MAF_EST of the air mass flow in the intake tract of the internal combustion engine is determined. This is done using the following equation:
- MAF_EST MAF_MAN_COR - M_EGR + MAF_CYL
- the blocks B2, B3, B4, B5, B6 thus form a control loop, the control variable of which is the measured value MAP_MES of the intake manifold pressure, the control variable of which is the estimated value MAP_EST of the intake manifold pressure, whose manipulated variable is the correction value COR, which in turn is corrected with the mass flow MAF_MAN within of the intake tract 1 and thus forms the corrected mass flow MAF_MAN_COR within the intake tract 1.
- the correction factor FAC is determined as a function of the temporal change in the measured value MAP_MES of the intake manifold pressure.
- the estimated value MAF_EST can even be determined in an alternative embodiment without the mass flow MAF_MAN within the intake tract.
- the mass flow MAF_MAN is simply set to zero within the intake tract, which corresponds to the block B1 being omitted.
- a sufficiently precise estimate MAF_EST of the mass flow into the intake tract can also be determined in a simplified manner without the calculations in block B1.
- Including block B1 has the advantage that the calculation of the mass flow MAF_MAN within the intake tract in block B1 provides a rough working point determination for the control loop in the sense of a pre-control and thus provides a more precise estimate MAF_EST of the mass flow in the intake tract becomes, which is a significant advantage particularly in dynamic driving operation of the internal combustion engine.
- Estimated value 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 also be omitted in a simpler embodiment.
- the estimated value MAF_EST of the mass flow can then be used for further calculation of control signals for actuators of the internal combustion engine or for diagnosis.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10102914A DE10102914C1 (en) | 2001-01-23 | 2001-01-23 | Method for determining an estimated value of a mass flow in the intake tract of an internal combustion engine |
DE10102914 | 2001-01-23 | ||
PCT/DE2001/004929 WO2002059471A1 (en) | 2001-01-23 | 2001-12-27 | Method for determining an estimated value of a mass flow in the intake passage of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1362173A1 true EP1362173A1 (en) | 2003-11-19 |
EP1362173B1 EP1362173B1 (en) | 2004-07-21 |
Family
ID=7671463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01984730A Expired - Lifetime EP1362173B1 (en) | 2001-01-23 | 2001-12-27 | Method for determining an estimated value of a mass flow in the intake passage of an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US6985806B2 (en) |
EP (1) | EP1362173B1 (en) |
DE (2) | DE10102914C1 (en) |
WO (1) | WO2002059471A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8412437B2 (en) | 2007-05-23 | 2013-04-02 | Continental Automotive Gmbh | Method and device for operating an internal combustion engine |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4029739B2 (en) * | 2003-02-05 | 2008-01-09 | トヨタ自動車株式会社 | Calculation of charge air quantity in internal combustion engine |
JP4565065B2 (en) * | 2003-03-03 | 2010-10-20 | 典孝 松尾 | Engine intake air flow rate measuring device |
US7273046B2 (en) * | 2004-07-09 | 2007-09-25 | Denso Corporation | Air-fuel ratio controller for internal combustion engine and diagnosis apparatus for intake sensors |
DE102005046504A1 (en) * | 2005-09-29 | 2007-04-05 | Bayerische Motoren Werke Ag | Device for determining the air mass flowing in the cylinder combustion chamber of an engine cylinder of a vehicle comprises a sensor arrangement for directly measuring the suction tube pressure and a calculating module |
US7139656B1 (en) * | 2005-12-14 | 2006-11-21 | Gm Global Technology Operations, Inc. | Mass airflow rate per cylinder estimation without volumetric efficiency map |
DE102006035096B4 (en) * | 2006-07-28 | 2014-07-03 | Continental Automotive Gmbh | Method and device for operating an internal combustion engine |
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 |
US9175623B2 (en) * | 2012-01-18 | 2015-11-03 | International Engine Intellectual Property Company, Llc | Mass airflow sensor calibration evaluation |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH025734A (en) * | 1988-06-24 | 1990-01-10 | Hitachi Ltd | Method for controlling auxiliary air feeding device of internal combustion engine |
DE3938898A1 (en) * | 1989-11-24 | 1991-05-29 | Sartorius Gmbh | METHOD AND DEVICE FOR PULSATION-FREE CONTINUOUS GRAVIMETRIC DOSING |
US5094213A (en) * | 1991-02-12 | 1992-03-10 | General Motors Corporation | Method for predicting R-step ahead engine state measurements |
JPH04311643A (en) * | 1991-04-10 | 1992-11-04 | Hitachi Ltd | Engine cylinder inflow air quantity computing method and fuel injection control method |
JPH09228884A (en) * | 1996-02-20 | 1997-09-02 | Toyota Motor Corp | Controller of internal combustion engine |
EP0886725B1 (en) * | 1996-03-15 | 1999-08-25 | Siemens Aktiengesellschaft | Process for model-assisted determination of fresh air mass flowing into the cylinder of an internal combustion engine with external exhaust-gas recycling |
DE19615542C2 (en) * | 1996-04-19 | 1998-05-07 | Daimler Benz Ag | Device for determining the engine load for an internal combustion engine |
DE19825305A1 (en) * | 1998-06-05 | 1999-12-09 | Bayerische Motoren Werke Ag | Method for correcting the air mass of an internal combustion engine sucked in through an intake manifold and measured in the intake manifold |
DE19844637C1 (en) * | 1998-09-29 | 1999-10-14 | Siemens Ag | Load control for IC engine |
US6697729B2 (en) * | 2002-04-08 | 2004-02-24 | Cummins, Inc. | System for estimating NOx content of exhaust gas produced by an internal combustion engine |
-
2001
- 2001-01-23 DE DE10102914A patent/DE10102914C1/en not_active Expired - Fee Related
- 2001-12-27 DE DE50102950T patent/DE50102950D1/en not_active Expired - Fee Related
- 2001-12-27 EP EP01984730A patent/EP1362173B1/en not_active Expired - Lifetime
- 2001-12-27 WO PCT/DE2001/004929 patent/WO2002059471A1/en active IP Right Grant
-
2003
- 2003-07-22 US US10/624,416 patent/US6985806B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO02059471A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8412437B2 (en) | 2007-05-23 | 2013-04-02 | Continental Automotive Gmbh | Method and device for operating an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
WO2002059471A1 (en) | 2002-08-01 |
DE50102950D1 (en) | 2004-08-26 |
US6985806B2 (en) | 2006-01-10 |
US20050021215A1 (en) | 2005-01-27 |
DE10102914C1 (en) | 2002-08-08 |
EP1362173B1 (en) | 2004-07-21 |
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