EP0894187A1 - Verfahren zur modellgestützten instationärsteuerung einer brennkraftmaschine - Google Patents
Verfahren zur modellgestützten instationärsteuerung einer brennkraftmaschineInfo
- Publication number
- EP0894187A1 EP0894187A1 EP97920567A EP97920567A EP0894187A1 EP 0894187 A1 EP0894187 A1 EP 0894187A1 EP 97920567 A EP97920567 A EP 97920567A EP 97920567 A EP97920567 A EP 97920567A EP 0894187 A1 EP0894187 A1 EP 0894187A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- behavior
- fuel
- parameters
- internal combustion
- combustion engine
- 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/047—Taking into account fuel evaporation or wall wetting
Definitions
- the invention relates to a method for model-based stationary control for compensating the wall film effects in the intake manifold of an internal combustion engine according to the preamble of claim 1.
- model parameters are selected depending on numerous measurable influencing variables, such as the speed or the temperature of the fuel, and are stored in characteristic maps. Influences on the wall film behavior, which are caused by a changed composition of the fuel, manufacturing-related tolerances of the individual engines or all Changes caused to the internal combustion engine due to maintenance cannot therefore be detected.
- the invention is based on the object of specifying a method for model-based unsteady-state control of an internal combustion engine, with which influences on the wall film behavior are taken into account when calculating the fuel metering, so that dynamic mixture errors can also be compensated for under changed operating conditions of the internal combustion engine.
- the method according to the invention allows the model parameters of a wall film compensation model to be adapted and thereby the dynamic mixture errors of the internal combustion engine to be minimized during driving operation.
- the permanent operation of the parameter adaptation with simultaneous use of the lambda control is ensured by a decoupling between parameter adaptation and lambda control. This has the advantage that the lambda control can continue to run during the adaptation; it reduces the stationary mixture deviations, while dynamic mixture errors are minimized by the parameter adaptation.
- the figure shows the structure of the function for compensating for the wall film effects, including the parameter estimation, using a block diagram which consists of two parallel fuel paths PF1, PF2 which have structurally identical dynamic behavior.
- the blocks SS11 and SS21 represent static non-linearities of the paths PF1 and PF2, the amplification of which in controlled operation is determined by the values of the basic application, namely by the amplification factors F ⁇ • _- • _ and F2 1 .
- These amplification factors are essentially functions of the speed and parameters, which represent the valve position or the valve overlap.
- a signal corresponding to the load size L of the internal combustion engine is supplied to each of the blocks SS11, SS21 as the input variable of the compensation model.
- the blocks SS11, SS21 representing static non-linearities are followed by dynamically non-linear systems with differentiating-delaying behavior (blocks DSU and DS21).
- the delay behavior of these elements is determined by the parameters of the basic application f ⁇ xl or f T21 . For further considerations, the assumption should
- the lambda value ⁇ determined by means of the lambda probe is characterized by a system with the dynamic (differentiating-delaying) behavior
- f- j -3 is an applicable filter factor that is read out from a map as a function of speed and ⁇ v corresponds to the dynamic mixture error.
- a parameter adaptation must allow the influencing of the total mass provided for a certain change in load size. This total mass must correspond to the mass increase of the fuel in the wall film.
- the evaporation rate, and thus also the fuel mass stored in the wall film, is influenced above all by a changed fuel composition.
- the factors mentioned, which bring about the changes in wall film behavior considered here, also cause deviations in the time course of the wall film build-up or breakdown.
- the adaptation of the model parameters (gain factors) F 1: L and F 2 ⁇ enables an adjustment of the compensation function taking into account the aspects mentioned.
- the parameter F ll le 9 t - ° e: * - of the selected model structure defines the total enrichment mass made available for a change in load size.
- the parameter F 2 ⁇ influences the time course of the enrichment by choosing a weighting between the path with high dynamics (path PF2) and the path with low dynamics (path PF1). It is thus possible to select which part of the input signal is routed via the path with high dynamics and which part via the path with low dynamics, so that the dynamic behavior of the total enrichment ADD is influenced.
- the output signal F 2] L of the block SS21 is thus subtracted from the output signal F u L of the block SS11.
- the gain of the 1st path PF1 can thereby be reduced and the possibility of changing the weighting of the input signal is given.
- the aim of estimating the correction parameters F 14 and F 2 4 is to minimize the quality function
- the difference ( ⁇ w / - ⁇ [n]) corresponds to the current dynamic mixture error, which is approximated by the quantity ⁇ v .
- the change in load size for path PF1 or path PF2 is determined in blocks DS12, DS22, which each have a differentially delaying behavior Equations
- the output variables of the blocks DS12 or DS22 are the changes in the delayed load signals L vl or L v2 .
- the factors F 13 and F 23 determine the convergence speed of the method.
- a low-pass filtering is implemented by the blocks DS14 and DS24.
- the output variable of these filters are the adaptation parameters F 14 and F 24 , which are used to correct the basic application values of the compensation model in accordance with equations (3) and (4).
- the outputs of the two paths PF1 and PF2 are mized sum and the result is an enrichment of ADD, wel ⁇ che the fuel mass in the wall film represents and are coded to the load size, in this example, the Basiseinspritzeit T j _ B ad ⁇ , so that an injection time t-j_ taking into account the wall film behavior is available. Since the choice of the temporal discretization of the differential equations is not critical for the specified method, the equations were notated in a continuous form. The principles shown can also be applied to other parameters of the model mentioned, for example f ⁇ xi ⁇ / ⁇ or to other models for compensating for the wall film effects, in particular also to models with only one path.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615004 | 1996-04-16 | ||
DE19615004 | 1996-04-16 | ||
PCT/DE1997/000658 WO1997039234A1 (de) | 1996-04-16 | 1997-04-01 | Verfahren zur modellgestützten instationärsteuerung einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0894187A1 true EP0894187A1 (de) | 1999-02-03 |
EP0894187B1 EP0894187B1 (de) | 1999-09-01 |
Family
ID=7791428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97920567A Expired - Lifetime EP0894187B1 (de) | 1996-04-16 | 1997-04-01 | Verfahren zur modellgestützten instationärsteuerung einer brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0894187B1 (de) |
DE (1) | DE59700397D1 (de) |
WO (1) | WO1997039234A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10016886A1 (de) | 2000-04-05 | 2001-10-18 | Volkswagen Ag | Verfahren und Vorrichtung zur Regelung einer Verbrennungskraftmaschine |
DE10206030B4 (de) * | 2002-02-14 | 2005-11-24 | Bayerische Motoren Werke Ag | Verfahren zum Anpassen eines Einspritzparameters eines Verbrennungsmotors an instationäre bzw. dynamische Vorgänge |
DE10252214B4 (de) * | 2002-11-11 | 2011-09-22 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Verfahren zur Erstellung eines Kennlinienfeldes zur Regelung der Kraftstoff-Wandfilmkompensationsmenge mittels Kraftstoffregelsystem bei einer Brennkraftmaschine |
DE102004009679B4 (de) * | 2004-02-27 | 2010-01-07 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Steuern einer Brennkraftmaschine |
DE102006029969B3 (de) * | 2006-06-29 | 2007-10-18 | Siemens Ag | Verfahren zur Plausibilitätsprüfung von Messwerten eines Umgebungsdrucksensors einer Brennkraftmaschine |
DE102017212247A1 (de) * | 2017-07-18 | 2019-01-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Verbrennungsmotors mit Saugrohreinspritzung |
DE102022203409A1 (de) | 2022-04-06 | 2023-10-12 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zur Anpassung einer einzuspritzenden Kraftstoffmasse |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR900000145B1 (ko) * | 1986-04-23 | 1990-01-20 | 미쓰비시전기 주식회사 | 내연기관의 연료제어장치 |
US4903668A (en) * | 1987-07-29 | 1990-02-27 | Toyota Jidosha Kabushiki Kaisha | Fuel injection system of an internal combustion engine |
DE4115211C2 (de) * | 1991-05-10 | 2003-04-30 | Bosch Gmbh Robert | Verfahren zum Steuern der Kraftstoffzumessung bei einer Brennkraftmaschine |
US5404856A (en) * | 1993-06-28 | 1995-04-11 | Ford Motor Company | Fuel injector control utilizing fuel film flow parameters |
-
1997
- 1997-04-01 EP EP97920567A patent/EP0894187B1/de not_active Expired - Lifetime
- 1997-04-01 WO PCT/DE1997/000658 patent/WO1997039234A1/de active IP Right Grant
- 1997-04-01 DE DE59700397T patent/DE59700397D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9739234A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0894187B1 (de) | 1999-09-01 |
WO1997039234A1 (de) | 1997-10-23 |
DE59700397D1 (de) | 1999-10-07 |
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