EP1567757A1 - Verfahren und vorrichtung zur schätzung des brennraumdrucks - Google Patents
Verfahren und vorrichtung zur schätzung des brennraumdrucksInfo
- Publication number
- EP1567757A1 EP1567757A1 EP03812145A EP03812145A EP1567757A1 EP 1567757 A1 EP1567757 A1 EP 1567757A1 EP 03812145 A EP03812145 A EP 03812145A EP 03812145 A EP03812145 A EP 03812145A EP 1567757 A1 EP1567757 A1 EP 1567757A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- model
- torque
- combustion chamber
- internal combustion
- chamber pressure
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
- F02D35/024—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure using an estimation
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
- F02D2200/1004—Estimation of the output torque
Definitions
- the present invention relates to a method for estimating a combustion chamber pressure of an internal combustion engine and a corresponding device therefor.
- the combustion chamber pressure is often used as the decisive parameter.
- Knowledge of combustion can be used for engine control to optimize the combustion process. Accordingly, the parameters of the combustion process, e.g. B. ignition timing and valve timing, are set by the engine control unit.
- the combustion chamber pressure can be determined by a pressure sensor. Due to the extremely high pressures to be measured, such sensors are neither cost-effective to manufacture nor to install and maintain. This has an even more disadvantageous effect on internal combustion engines with high numbers of cylinders.
- the object of the present invention is therefore to obtain data about the combustion process in the individual combustion spaces of an internal combustion engine in a more cost-effective manner.
- this object is achieved by a method for estimating a combustion chamber pressure of an internal combustion engine by modeling the internal combustion engine with a plurality of model parameters in one model, providing a combustion chamber pressure value and one torque, detecting an actual alternating torque, comparing the model alternating torque with the actual alternating torque while modifying the model parameters and determining an estimated value of the combustion chamber pressure based on the model on the basis of the changed model parameters.
- the invention provides a corresponding device for estimating a combustion chamber pressure of an internal combustion engine with a computing device for modeling the internal combustion engine with a plurality of model parameters in a model while providing a combustion chamber pressure value and a model change torque, and a detection device connected to the computing device for detecting an actual alternating torque , with the computer unit being able to compare the model change torque with the actual change torque while changing the model parameters, and an estimate of the combustion chamber pressure can be determined on the basis of the model on the basis of the changed model parameters.
- the model according to the invention it is possible to obtain statements about the energy conversion in each cylinder.
- the advantage here is that a map with a large number of parameters does not have to be recorded in advance for each cylinder in order to obtain data about the combustion process for a current run. Rather, the model makes it possible to obtain realistic parameters for the cyclic process and thus carry out, for example, pollutant or fuel minimization.
- the model preferably contains a cycle process model for describing combustion in a combustion chamber.
- Suitable cycle models are well known and can be used to simulate practically every firing process with a variety of parameters.
- the model can include a mechanical model for describing a spring-mass system of the internal combustion engine.
- the individual mechanics of an internal combustion engine for generating a torque can hereby be taken into account,
- a Bandbegren may be provided Zung.
- the DC component can be filtered out on the one hand and any interference in the high-frequency range minimized on the other.
- the comparison between the model change torque and the actual change torque is preferably carried out by error calculation and reduction of the error below a predetermined limit by the model parameters with the help of a control loop.
- An automatic model validation takes place through this control loop.
- the actual alternating torque can be an estimated value that was determined by a torque estimation model. Furthermore, the actual alternating torque can also be measured, as was mentioned in the introduction.
- the basis of the cylinder pressure estimate is a comparison of an actually measured or likewise estimated actual alternating torque IW with a model alternating torque MW, which is determined by a suitable model.
- the model is shown as a control loop on the right side.
- the model essentially consists of a cycle process model 1 and a mechanical model 2, in the cycle process model, as indicated by the arrow in the figure coming from above, first starting values, for example for engine temperature, ignition timing and the like, as rough reference values for current operating values of the engine taken from the engine control.
- the cycle process model 1 calculates a pressure curve in the individual combustion chambers of the various cylinders.
- Mechanical model 2 uses the determined pressure profiles in the individual cylinders in order to generate a torque profile for the crankshaft. For this, the spring-mass system of the internal combustion engine is taken into account. In particular, a torque with a constant and alternating component is calculated.
- the alternating component contains torsional moments, for example of the crankshaft, and moments of inertia of rotating or oscillating masses such as crankshaft, connecting rods and the like.
- the torque curve obtained from the mechanical model 2 is subjected to a band limitation in block 3. This serves in particular to release the mean value, ie to free the torque curve from the direct torque that occurs.
- the band limitation also eliminates higher interference frequencies, so that the signal-to-noise ratio of the remaining useful signal increases.
- the output signal of block 3 is therefore a model torque torque MW which is reduced in terms of interference.
- this model change torque MW is compared with an actual change torque IW and a corresponding error is determined and provided as an output signal.
- the mean square error is preferably used as the error.
- an attempt is made to minimize this error.
- the error is compared with a given barrier. If the error is greater than the barrier, one or more of the model parameters for the cycle process model 1 are changed. If the mean square error is smaller than the predetermined limit, the desired optimum has been reached and the model parameters of the cycle process model 1 can be regarded as realistic for the current combustion process.
- the optimal model parameters are found iteratively in a control loop.
- a computationally complex one-step process can also be used for this.
- the left part of the figure indicates how the actual alternating torque IW is determined. In the present case, this is done using a torque estimation method. The model used for this is symbolized with block 6. In this case, a speed signal obtained by means of period measurement 61 firstly undergoes sensor wheel error compensation or sensor wheel adaptation 62. The sensor wheel error only has to be taught in once for each motor and then stored. The subsequent processing with digital filtering and mass force compensation 63 leads to the desired actual alternating torque IW.
- crank angle-resolved evaluation of the momentum potential can be used to estimate the cylinder pressure.
- the cylinder pressure estimate implemented in this way paves the way for speed-based, cylinder-selective engine management without costly cylinder pressure sensors.
- a typical application would be cylinder misfire detection.
- the engine data obtained can also be used for the vehicle safety concepts.
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)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10256107 | 2002-11-29 | ||
| DE10256107A DE10256107A1 (de) | 2002-11-29 | 2002-11-29 | Verfahren und Vorrichtung zur Schätzung des Brennraumdrucks |
| PCT/EP2003/012316 WO2004051064A1 (de) | 2002-11-29 | 2003-11-05 | Verfahren und vorrichtung zur schätzung des brennraumdrucks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1567757A1 true EP1567757A1 (de) | 2005-08-31 |
| EP1567757B1 EP1567757B1 (de) | 2006-08-16 |
Family
ID=32403677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03812145A Expired - Lifetime EP1567757B1 (de) | 2002-11-29 | 2003-11-05 | Verfahren und vorrichtung zur schätzung des brennraumdrucks |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7292926B2 (de) |
| EP (1) | EP1567757B1 (de) |
| AT (1) | ATE336649T1 (de) |
| AU (1) | AU2003302686A1 (de) |
| DE (2) | DE10256107A1 (de) |
| WO (1) | WO2004051064A1 (de) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004055313B4 (de) * | 2004-11-16 | 2017-06-22 | Volkswagen Ag | Verfahren und Vorrichtung zur Diagnose oder Verstärkungsadaption von Zylinderdrucksensoren |
| US7389773B2 (en) | 2005-08-18 | 2008-06-24 | Honeywell International Inc. | Emissions sensors for fuel control in engines |
| DE102006016905A1 (de) * | 2006-04-11 | 2007-10-25 | Daimlerchrysler Ag | Verfahren zum Betreiben einer Brennkraftmaschine |
| DE102006053255B3 (de) * | 2006-11-08 | 2008-01-10 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Verfahren zum Bestimmen des Zylinderinnendrucks einer Brennkraftmaschine |
| DE102007007641A1 (de) | 2007-02-08 | 2008-08-14 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Verfahren zur Klopfregelung |
| US8060290B2 (en) | 2008-07-17 | 2011-11-15 | Honeywell International Inc. | Configurable automotive controller |
| US8620461B2 (en) | 2009-09-24 | 2013-12-31 | Honeywell International, Inc. | Method and system for updating tuning parameters of a controller |
| CN102472196B (zh) * | 2010-02-16 | 2013-11-27 | 丰田自动车株式会社 | 内燃机的缸内压力估计装置 |
| US8504175B2 (en) | 2010-06-02 | 2013-08-06 | Honeywell International Inc. | Using model predictive control to optimize variable trajectories and system control |
| US9677493B2 (en) | 2011-09-19 | 2017-06-13 | Honeywell Spol, S.R.O. | Coordinated engine and emissions control system |
| US9650934B2 (en) | 2011-11-04 | 2017-05-16 | Honeywell spol.s.r.o. | Engine and aftertreatment optimization system |
| US20130111905A1 (en) | 2011-11-04 | 2013-05-09 | Honeywell Spol. S.R.O. | Integrated optimization and control of an engine and aftertreatment system |
| DE102014010452A1 (de) * | 2014-07-14 | 2016-01-14 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung der Verbrennung in einer Brennkraftmaschine |
| DE102014010453A1 (de) * | 2014-07-14 | 2016-01-14 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung der Verbrennung in einer Brennkraftmaschine |
| DE102014010454A1 (de) | 2014-07-14 | 2015-12-03 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung einer Verbrennung in einer Brennkraftmaschine |
| EP3051367B1 (de) | 2015-01-28 | 2020-11-25 | Honeywell spol s.r.o. | Ansatz und system zur handhabung von einschränkungen für gemessene störungen mit unsicherer vorschau |
| EP3056706A1 (de) | 2015-02-16 | 2016-08-17 | Honeywell International Inc. | Ansatz zur nachbehandlungssystemmodellierung und modellidentifizierung |
| EP3091212A1 (de) | 2015-05-06 | 2016-11-09 | Honeywell International Inc. | Identifikationsansatz für verbrennungsmotor-mittelwertmodelle |
| EP3125052B1 (de) | 2015-07-31 | 2020-09-02 | Garrett Transportation I Inc. | Quadratischer programmlöser für mpc mit variabler anordnung |
| US10272779B2 (en) | 2015-08-05 | 2019-04-30 | Garrett Transportation I Inc. | System and approach for dynamic vehicle speed optimization |
| US10415492B2 (en) | 2016-01-29 | 2019-09-17 | Garrett Transportation I Inc. | Engine system with inferential sensor |
| US10036338B2 (en) | 2016-04-26 | 2018-07-31 | Honeywell International Inc. | Condition-based powertrain control system |
| US10124750B2 (en) | 2016-04-26 | 2018-11-13 | Honeywell International Inc. | Vehicle security module system |
| EP3548729B1 (de) | 2016-11-29 | 2023-02-22 | Garrett Transportation I Inc. | Inferenzflusssensor |
| US11057213B2 (en) | 2017-10-13 | 2021-07-06 | Garrett Transportation I, Inc. | Authentication system for electronic control unit on a bus |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2535894B2 (ja) | 1987-04-03 | 1996-09-18 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
| US5722519A (en) * | 1994-10-14 | 1998-03-03 | Ford Global Technologies, Inc. | Multiple ratio automatic transmission and torque converter |
| DE19504098A1 (de) * | 1995-02-08 | 1996-08-22 | En Umwelt Beratung E V I | Verfahren zur kontinuierlichen Bestimmung eines sich ändernden Innendruckverlaufs im Arbeitsraum einer Kolbenmaschine, insbesondere des Verbrennungsdruckverlaufs einer Verbrennungskraftmaschine der Kolbenbauart mittels indirekter Meßwerterfassung von Bewegungsgrößen der brennraumumschließenden Bauteile |
| DE19632650C1 (de) * | 1996-08-13 | 1998-03-12 | Siemens Ag | Verfahren zum Unterdrücken von Drehmomentsprüngen beim Betrieb einer Brennkraftmaschine |
| DE19749815B4 (de) | 1997-11-11 | 2012-04-26 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Ermittlung der eingespritzten Kraftstoffmenge |
| DE19900738C1 (de) * | 1999-01-12 | 2000-06-15 | Daimler Chrysler Ag | Verfahren und Vorrichtung zur Bestimmung eines Brennraumdruckverlaufs bei einer Brennkraftmaschine |
| US6714852B1 (en) * | 2000-02-11 | 2004-03-30 | Ford Global Technologies, Llc | Observer for engine crankshaft torque |
| US6336070B1 (en) * | 2000-03-01 | 2002-01-01 | Ford Global Technologies, Inc. | Apparatus and method for engine crankshaft torque ripple control in a hybrid electric vehicle |
| DE10047003A1 (de) * | 2000-09-22 | 2002-04-25 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
| WO2002071308A1 (en) | 2001-03-05 | 2002-09-12 | The Ohio State University | Engine control using torque estimation |
-
2002
- 2002-11-29 DE DE10256107A patent/DE10256107A1/de not_active Ceased
-
2003
- 2003-11-05 EP EP03812145A patent/EP1567757B1/de not_active Expired - Lifetime
- 2003-11-05 US US10/536,557 patent/US7292926B2/en not_active Expired - Fee Related
- 2003-11-05 AT AT03812145T patent/ATE336649T1/de not_active IP Right Cessation
- 2003-11-05 WO PCT/EP2003/012316 patent/WO2004051064A1/de not_active Ceased
- 2003-11-05 AU AU2003302686A patent/AU2003302686A1/en not_active Abandoned
- 2003-11-05 DE DE50304686T patent/DE50304686D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004051064A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003302686A1 (en) | 2004-06-23 |
| AU2003302686A8 (en) | 2004-06-23 |
| EP1567757B1 (de) | 2006-08-16 |
| DE10256107A1 (de) | 2004-08-12 |
| DE50304686D1 (de) | 2006-09-28 |
| US7292926B2 (en) | 2007-11-06 |
| WO2004051064A1 (de) | 2004-06-17 |
| ATE336649T1 (de) | 2006-09-15 |
| US20060196173A1 (en) | 2006-09-07 |
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