EP1989431A1 - Verfahren und vorrichtung zur robusten abschätzung für das verhältnis von steuereinspritzparameter zu resultierender eingespritzter kraftstoffmenge - Google Patents
Verfahren und vorrichtung zur robusten abschätzung für das verhältnis von steuereinspritzparameter zu resultierender eingespritzter kraftstoffmengeInfo
- Publication number
- EP1989431A1 EP1989431A1 EP07704637A EP07704637A EP1989431A1 EP 1989431 A1 EP1989431 A1 EP 1989431A1 EP 07704637 A EP07704637 A EP 07704637A EP 07704637 A EP07704637 A EP 07704637A EP 1989431 A1 EP1989431 A1 EP 1989431A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- grid
- test
- points
- parameter
- 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.)
- Ceased
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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2416—Interpolation techniques
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2477—Methods of calibrating or learning characterised by the method used for learning
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2432—Methods of calibration
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
Definitions
- the present invention relates to a method and device for estimating a map of an injection system of an internal combustion engine for controlling the injection.
- the present invention relates to a method for estimating at least one control parameter for a target injection quantity.
- crankshaft sensor that detects the angular velocity of the crankshaft. This variable provides an excellent source for deriving dynamic magnitudes derived from individual burns in the cylinder.
- Previous technical arrangements use a high-resolution noise measurement in the engine with the aid of one or more microphones or knock sensors. These are attached to the engine block near the cylinder.
- cylinder pressure measurements are using a cylinder pressure sensor performed. Cylinder pressure sensors may be located at various positions within the cylinder.
- both approaches have the disadvantage that they are not installed as standard in motor vehicles and therefore substantially increase the manufacturing cost of the motor vehicle.
- the method and apparatus for estimating at least one control parameter of an injection system of an internal combustion engine for a target injection quantity comprises the following steps: determining an injection control grid having a plurality of grid points described by at least one grid parameter and one grid injection quantity while the injection control grid describes an operating area of the injection system, Determine at least one
- Test point based on at least one isolated injection injection injection system, while the at least one test point is described by at least one test parameter and a test injection quantity, and estimating the control parameter of a target injection amount using limited linear regression between grid points and test point within at least a portion of the operating range of the injection system.
- the present method is initially based on an injection control grid, which is formed for example by an initial calibration of the injection system of the internal combustion engine.
- This injection control grid covers all or part of the entire operating range of the injection system. It is spanned by individual grid points whose coordinates are defined by at least one parameter of the injection system, the grid parameter, and an injection quantity assigned to the grid parameter, the grid injection quantity, cha be characterized. These grid points give a rough estimate of the operating range of the injection system, ie they supply individual injection parameters in the form of grid parameters with which specific injection quantities in the form of grid injection quantities are achieved.
- test point or a plurality of test points is generated within the injection control grid.
- the generation of these test points are characterized in a manner similar to the grid points by a respective test parameter of the injection system and a test injection quantity assigned to the test parameter, are generated with the aid of isolated test injections.
- isolated test injections in comparison to the normal overrun operation of the internal combustion engine, denote small quantities of fuel which are injected into the individual cylinders of the internal combustion engine in phases of disconnected fuel supply.
- the combustion of the isolated test injections produce evaluable torque fluctuations, from which the actual injected fuel quantity can be derived.
- a given test parameter is assigned an actual test injection quantity.
- a linear regression between the selected test points and grid points is performed, so that with the obtained linear regression in the form of a straight-line equation, the control parameter of a target injection quantity can be estimated.
- a straight line equation or linear regression is determined for at least a subarea of the operating range of the injection system.
- the grid points and the at least one test point for the at least one straight line equation are preferably selected such that the two Linear equations or restricted linear regressions from different sides, preferably from approximately opposite sides, approach the desired target injection quantity. The better the test points with the isolated test injections approach the desired target injection quantity, the more accurately the estimation of the target injection quantity and the associated control parameter can take place with the aid of the linear regressions between the grid points and these test points.
- the above test points are generated until a number of test points are reached within a tolerance range arranged around the target injection quantity or a minimum number of iterations across the test points.
- control parameter of the target injection quantity is determined on the basis of the boundary condition that the two linear equations or linear regressions meet at the level of the target injection quantity in the operating range of the injection system.
- Fig. 1 shows an exemplary program for the description of an injection system, which is characterized by a partially linear curve for describing the relationship between actuation time of the injection system and injection quantity.
- FIG. 2 shows an exemplary piecewise linear regression for estimating the control parameter of a target injection quantity.
- 3 shows a flow chart of a preferred embodiment of the present invention for determining control parameters of a target injection quantity of an injection system of an internal combustion engine.
- the present invention discloses an estimate of the control parameters p of an injection system for internal combustion engines. That is, in an open loop, individual estimates are provided for control parameters p and other fuel injection influencing variables u D as a function of injected quantities of fuel m.
- control parameters in this open loop pay attention to the actuation time, the actuation voltage or energy, as well as all other parameters of the injection system which have an influence on the injected fuel quantity.
- the function g is usually in automotive applications a calibration defined interpolation table based on a finite grid of fuel quantities and other parameters of the injection.
- n m grid points for fuel quantities and n D grid points for each further influence variable u D there are n m grid points for fuel quantities and n D grid points for each further influence variable u D.
- the function g is not constant over the entire life of the injection system due to aging processes of the injection system. Therefore, an adjustment of g in a closed loop is required to ensure accurate injection of fuel quantities.
- Various measurements are made in which p is repeatedly applied in a particular manner until either the measured fuel quantities m are sufficiently close to the point of interest or a maximum number of iterations has been passed.
- a feature of the approach described below is that using the adjacent grid points, a test point is sufficient to provide an accurate estimate of the control parameter at the injection set point.
- the invention is based on the recognition that characteristic lines in the characteristic diagram for controlling the injection are, in an approximation, piece by piece linear. This is exemplified in Fig. 1.
- the abscissa in FIG. 1 describes the electrical actuation time or injection time in milliseconds (ms), while the ordinate represents the injected fuel quantity in milligrams (mg). From the graph, it can be seen that the relationship between the injection parameter and the injected fuel quantity can be approximated by a piecewise linear course of the curve.
- injection parameters can be estimated with greater accuracy than in the prior art.
- injected fuel quantities and corresponding parameters are approximated with the aid of sectionally limited linear models and the method of least squares.
- Fig. 2 an adjustment problem is exemplified.
- An update is sought for the parameter p s of the fuel quantity setpoint m s .
- This is a section through the Injection control map considered by keeping the large u D constant and adjusting each injection set point in the grid individually.
- the advantage of this adaptation strategy is that adjacent Einspritzmen- gen-grid values RTII, m r and the corresponding stored injection parameter pi and p r are used in order g for estimating the function, such as that of the injection parameter p s, for the desired fuel quantity Contribute setpoints m s .
- the final new control parameter p new may deviate from the updated or estimated control parameter p est .
- a control grid having a plurality of grid points in an interesting injection quantity range is determined.
- the track points are defined by at least one grid parameter, i. a control parameter (see above) of the injection system, and a corresponding grid injection quantity identified.
- a grid corresponds, for example, to a basic calibration of the injection system, in which different grid injection quantities are assigned corresponding grid parameters.
- Such grid points are shown in Fig. 2 by triangles.
- an estimate for the corresponding control parameter of the injection system is sought, for example, for the injection quantity of 1 mg of fuel.
- This target injection quantity of 1 mg fuel and the corresponding control parameter ter are exemplified in Fig. 2 by the square symbol.
- test points In order to be able to estimate the control parameter, a plurality of test points is determined in addition to the already existing grid points (triangular symbols in FIG. 2) in the operating region of the injection system.
- the test points which are illustrated by circles in FIG. 2, should as far as possible be located in the vicinity of the target injection quantity (square symbol in FIG. 2).
- the test points are generated by means of isolated injections. That is, test pulses are injected into the cylinders of the internal combustion engine and ignited in phases of cut-off fuel supply by the specification of test parameters. The torque generated by the combustion is evaluated by means of the crankshaft sensor, so that the actually injected test injection quantity can be determined. In this way, the test parameters are assigned the actually injected test injection quantities, so that a plurality of test points are generated (compare circular symbols in FIG. The generation of the test points is described in detail in the not yet published patent application DE 10 2006 006 303.1.
- the test points are generated in a short range ⁇ of the target injection quantity.
- the near zone ⁇ denotes the region bounded by vertical lines in FIG. 2 by the abovementioned target injection quantity. If the test points lie in the near range ⁇ , a more accurate estimation of the control parameter for the target injection quantity is thereby supported.
- test point 1 For the given test parameter 1.15, the test injection quantity of 1.3 mg was determined.
- the test parameters for example, are not gradually reduced by 0.05, starting from test point 1, until the corresponding injection quantities are in the near range ⁇ . Instead, it is immediately attempted to select the subsequent test parameter (cf., for example, test point 3 in FIG. 2) in such a way that the newly generated test point is spaced apart by a larger parameter jump and is immediately in the near range ⁇ of the target injection quantity.
- This procedure shortens the measuring time for estimating the control parameter and reduces the amount of data to be evaluated at test points.
- the iterations described below were terminated as soon as the last of the successively generated test points 1, 2, 3, ie test point 3, was in the ⁇ -interval.
- the control parameter of the target injection quantity is estimated using constrained linear regression between grid points and test points within at least a portion of the operating range of the injector.
- the coordinates of the grid points shown in FIG. 2 are denoted by (rtii, pi) (left grid point) and (m r , p r ) (right grid point), ai denotes the slope within a straight line equation, whose straight line is a linear regression through the left lattice point (rru, pi) and the test point 2 (see Fig. 2).
- a r denotes the slope within the line equation whose straight line represents a linear regression through the right lattice point (m r , p r ) and the test points 1 and 2.
- m s denotes the target injection quantity of, for example, 1 mg fuel, for which an estimate of the corresponding control parameter p s is sought.
- the control parameter is to be determined by means of limited linear regression by the existing test points Im 1 , P 1 ). On the one hand, the sum of the error squares
- Measuring point ItI 1 is located on the left or the right side of the target injection amount m s .
- Each measurement point (Hi 1 , P 1 ) then designates a line Y 1 in the vector Y and a line X 1 in the matrix X, as shown in equations (4).
- X 1 [(In 1 - Jn 1 ) I ⁇ ⁇ J7I>) (m r - mjl ⁇ ⁇ ,]
- I ⁇ A ⁇ is 1 if the equation or inequality A is satisfied, and 0 if it is not satisfied.
- the remaining values are defined as:
- ⁇ (-) describes a nonlinear function.
- the adjustment of the fuel injection amount m s to the injection control grid is considered.
- the iterations may be terminated upon reaching a tolerance level, such as I ⁇ - J ⁇ , or when a certain number of iterations have been performed.
- a tolerance level such as I ⁇ - J ⁇
- the above constrained linear regression scheme is applied to the collected statistical values. In this way, one obtains a new estimate of a control parameter for the setpoint of an injection quantity. In the latter case, however, at least two measuring points are required. This process is again summarized schematically in FIG. 4.
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 (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006007786A DE102006007786B3 (de) | 2006-02-20 | 2006-02-20 | Verfahren und Vorrichtung zur Abschätzung mindestens eines Steuerparameters einer Einspritzanlage einer Brennkraftmaschine für eine Zieleinspritzmenge |
PCT/EP2007/051556 WO2007096328A1 (de) | 2006-02-20 | 2007-02-19 | Verfahren und vorrichtung zur robusten abschätzung für das verhältnis von steuereinspritzparameter zu resultierender eingespritzter kraftstoffmenge |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1989431A1 true EP1989431A1 (de) | 2008-11-12 |
Family
ID=38089715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07704637A Ceased EP1989431A1 (de) | 2006-02-20 | 2007-02-19 | Verfahren und vorrichtung zur robusten abschätzung für das verhältnis von steuereinspritzparameter zu resultierender eingespritzter kraftstoffmenge |
Country Status (5)
Country | Link |
---|---|
US (1) | US8296039B2 (de) |
EP (1) | EP1989431A1 (de) |
CN (1) | CN101384811A (de) |
DE (1) | DE102006007786B3 (de) |
WO (1) | WO2007096328A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012021076B4 (de) * | 2012-10-19 | 2023-03-30 | Rolls-Royce Solutions GmbH | Verfahren zur Ermittlung von mindestens einem tatsächlichen Einspritzparameter mindestens eines Injektors in einem Verbrennungsmotor und Motorsteuergerät |
US9933334B2 (en) * | 2015-06-22 | 2018-04-03 | General Electric Company | Cylinder head acceleration measurement for valve train diagnostics system and method |
GB2533464A (en) * | 2015-10-20 | 2016-06-22 | Gm Global Tech Operations Llc | Method of operating a fuel injector of an internal combustion engine |
CN105910665B (zh) * | 2016-04-12 | 2018-12-18 | 北京荣之联科技股份有限公司 | 基于车载诊断***数据的油耗测算方法和装置 |
WO2024077316A1 (en) * | 2022-10-12 | 2024-04-18 | Innio Jenbacher Gmbh & Co Og | Method for controlling a power source |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS606044A (ja) * | 1983-06-22 | 1985-01-12 | Honda Motor Co Ltd | 内燃エンジン用燃料噴射装置の制御方法 |
JPS60111045A (ja) * | 1983-11-21 | 1985-06-17 | Hitachi Ltd | デイ−ゼル機関の燃料制御装置 |
JPS6116249A (ja) | 1984-07-03 | 1986-01-24 | Diesel Kiki Co Ltd | 電子式燃料噴射装置 |
JPS6187941A (ja) | 1984-10-05 | 1986-05-06 | Nippon Denso Co Ltd | デイ−ゼル機関用燃料噴射時期制御装置 |
JPH01155042A (ja) * | 1987-12-10 | 1989-06-16 | Honda Motor Co Ltd | 内燃エンジンの燃料供給制御装置 |
JPH04321741A (ja) * | 1991-04-19 | 1992-11-11 | Japan Electron Control Syst Co Ltd | 内燃機関の空燃比学習制御装置 |
JP3160734B2 (ja) * | 1992-12-08 | 2001-04-25 | 本田技研工業株式会社 | エンジンの制御方法 |
DE19809173A1 (de) * | 1998-03-04 | 1999-09-09 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Steuern der Kraftstoffeinspritzung |
DE19910035A1 (de) * | 1999-03-08 | 2000-09-14 | Fev Motorentech Gmbh | Verfahren zur automatischen Erstellung von geglätteten Kennfeldern für eine elektronische Motorsteuerung einer Kolbenbrennkraftmaschine |
DE19945618B4 (de) * | 1999-09-23 | 2017-06-08 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines Kraftstoffzumeßsystems einer Brennkraftmaschine |
KR20040014488A (ko) * | 2001-04-10 | 2004-02-14 | 로베르트 보쉬 게엠베하 | 적어도 하나의 인젝터의 분사 작동을 보정하기 위한시스템 및 방법 |
US6561164B1 (en) * | 2001-10-29 | 2003-05-13 | International Engine Intellectual Property Company, Llc | System and method for calibrating fuel injectors in an engine control system that calculates injection duration by mathematical formula |
US6725147B2 (en) * | 2001-10-31 | 2004-04-20 | International Engine Intellectual Property Company, Llc | System and method for predicting quantity of injected fuel and adaptation to engine control system |
JP2003232241A (ja) * | 2002-02-08 | 2003-08-22 | Mitsubishi Electric Corp | 内燃機関の燃料噴射装置 |
JP4061982B2 (ja) | 2002-06-19 | 2008-03-19 | 株式会社デンソー | 燃料噴射システム |
DE10328787A1 (de) * | 2003-06-26 | 2005-01-27 | Robert Bosch Gmbh | Verfahren zur korrelationsbasierten Bedatung eines diskretisierten Kennfeldes in einem Steuergerät einer Brennkraftmaschine |
EP1526267A3 (de) * | 2003-10-21 | 2010-07-28 | Continental Automotive GmbH | Verfahren zur Driftkompensation eines Injektors für die direkte Kraftstoffeinspritzung in einen Zylinder einer Brennkraftmaschine sowie Vorrichtung |
-
2006
- 2006-02-20 DE DE102006007786A patent/DE102006007786B3/de not_active Expired - Fee Related
-
2007
- 2007-02-19 EP EP07704637A patent/EP1989431A1/de not_active Ceased
- 2007-02-19 WO PCT/EP2007/051556 patent/WO2007096328A1/de active Application Filing
- 2007-02-19 US US12/279,784 patent/US8296039B2/en not_active Expired - Fee Related
- 2007-02-19 CN CNA2007800060208A patent/CN101384811A/zh active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2007096328A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006007786B3 (de) | 2007-06-21 |
US8296039B2 (en) | 2012-10-23 |
WO2007096328A1 (de) | 2007-08-30 |
CN101384811A (zh) | 2009-03-11 |
US20090024307A1 (en) | 2009-01-22 |
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