EP0375710A1 - Einstellsystem (steuerungs- und/oder regelungssystem) für kraftfahrzeuge. - Google Patents
Einstellsystem (steuerungs- und/oder regelungssystem) für kraftfahrzeuge.Info
- Publication number
- EP0375710A1 EP0375710A1 EP88907097A EP88907097A EP0375710A1 EP 0375710 A1 EP0375710 A1 EP 0375710A1 EP 88907097 A EP88907097 A EP 88907097A EP 88907097 A EP88907097 A EP 88907097A EP 0375710 A1 EP0375710 A1 EP 0375710A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- manipulated variable
- sensor
- setting
- value
- 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
- 230000001105 regulatory effect Effects 0.000 title description 7
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000000523 sample Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 101150073877 egg-1 gene Proteins 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
-
- 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
- F02D41/2454—Learning of the air-fuel ratio control
-
- 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
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2474—Characteristics of sensors
Definitions
- the invention relates to an egg 1 system for sizes to be monitored in motor vehicles.
- the term "setting system” is used here as a collective term for "control system” (Open Loop Control) and for "control system” (Closed Loop Control).
- the term “item 1 unit” is used as a collective term for "control unit” and “control unit” and the term “item 1 line” for "control line” and “control line”.
- the term “unit” is basically to be understood in the sense of a functional unit. A control unit and a regulating unit therefore do not need to be separate assemblies, but, as is common today in automotive engineering, they can be implemented by functions of a microprocessor.
- the invention relates in particular to the setting of the amount of fuel supplied to an internal combustion engine in such a way that a desired lambda value is achieved as precisely as possible.
- FIG. 1 is an exemplary embodiment of a fuel quantity setting 1 arrangement as is known from DE-C2-24 57 436.
- the setting! system from a single setting 1, which is designed as a combined control unit.
- This control / regulation unit • signals are sent from a sensor arrangement 11, specifically the signal of a speed sensor and the signal of a throttle kl appensensors.
- the air volume drawn in by the associated engine can be determined from these signals. From this air volume, the control unit calculates an associated fuel quantity and determines the value of a manipulated variable that is fed to a fuel injection pump 12.
- the manipulated variable is predefined from a throttle / speed characteristic field and modified by a multiplicative factor that depends on the difference between a lambda sol value determined for the control unit and an actual lambda value as it depends on a lambda acting as an output sensor.
- Probe 13 is delivered to the regulating unit 10.
- Air mass sensors in the form of hot wire air mass sensors or hot ßfi are therefore also used in the prior art as sensor arrangements. m! air mass sensors used. These allow a very precise determination of the air mass.
- Hot ßfi 1 ml air mass sensors can be manufactured cheaply and robustly, but then they work relatively slowly.
- the invention is based on the object of specifying a setting system which sets faster and more precisely than the one mentioned at the beginning.
- An inventive egg nstel one system not only has a single egg nstel 1 egg Nhe 't, vor ⁇ as in the prior art handen but two egg nstel 1 th ei Nhe.
- the first setting 1 unit outputs the control signal to the * setting 1 range, while the second setting 1 unit serves to calibrate the first setting 1 unit.
- the second setting 1 unit is provided for interconnection with a second sensor arrangement, which measures more slowly but more precisely than a first sensor arrangement which is connected to the first setting unit.
- the first setting 1 unit can react very quickly to changes as reported by the first sensor arrangement.
- the first manipulated variable quickly determined in this way is compared with a second manipulated variable, which is determined more slowly but more precisely by the second control unit.
- the first manipulated variable is changed so that the deviation moves in the direction of zero. As a result, the overall system can react quickly and yet precisely to changes in the input variables. If the first manipulated variable is also to be defined as a function of an output variable, one of the two settings 1 units will send the signal from an off gear sensor fed.
- the first egg! a control unit which receives signals from a speed sensor and a throttle clap sensor in order to determine an air volume therefrom, an air mass therefrom and again a first manipulated variable which determines the amount of fuel which the Air mass is to be added in order to obtain a desired lambda value.
- the second setting unit is also a control unit, which, however, receives the signal from a hot ßfi Im! Air mass sensor is supplied, which allows a more precise determination of the air mass than it is possible from speed and throttle kl appenstel 1 ung.
- the time behavior of this second sensor arrangement is slower than that of the first sensor arrangement, as described above.
- the second control unit determines a second manipulated variable, which is a measurement of the fuel quantity.
- this manipulated variable is not supplied to the fuel injection pump; instead, as described above for the general case, it is used to calibrate the first setting 1.
- the cal bration values can, for. B. be stored differently in a map for different operating points. In this way, deviations dependent on the operating point are then compensated for separately.
- Each of the two control units according to the exemplary embodiment just described can be designed as a control unit to which the signal is fed by a lambda sensor. Which of the two control units is designed as a control / regulating unit largely depends on the time behavior of the associated control / regulating trip in the respective case. The arrangement is made so that the risk of rule vibrations is as small as possible.
- FIG. 1 shows a block diagram of a known setting 1 arrangement for setting the amount of fuel supplied to a motor vehicle engine.
- 2 shows a block diagram of an element 1 arrangement with an element 1 system according to the invention with two elements 1.
- Figures 3 and 4 each show a block diagram of item 1 arrangements with a item 1 system, each with a control unit and a control unit.
- the setting system 1 is designed as a microprocessor system with the following functional units: a first setting 1 unit, which is designed as a first control unit 10.1.1, a second setting 1 unit, which is used as a second control unit 10.2.1, and a calibration unit 15.
- the first control unit 10.1.1 receives at least one command variable from the first sensor arrangement 11.1.
- the first sensor arrangement 11.1 emits signals from a speed sensor and from a throttle valve sensor. From these signals, the first control unit 10.1.1 calculates the first manipulated variable, which in the case of the embodiment mentioned is the signal that is delivered to a fuel injection pump as the setting section 12.1.
- the first manipulated variable is calculated either via a speed sensor / throttle k 1 appensensor / stel 1 size characteristic curve d or by using the signals from the speed sensor and the throttle - 5 - sel kl appensensor an air volume, from this an air mass, from it a fuel quantity and from this the first manipulated variable is determined.
- the second control unit 10.2.1 receives an input signal from the second sensor arrangement 11.2, which in the case of the addressed configuration is designed as an air mass sensor.
- This air mass sensor determines the air mass sucked in by an internal combustion engine much more precisely than a determination of the air mass from the measurement of speed and throttle valve position with the aid of the first sensor arrangement 11.1.
- the air mass sensor according to the second sensor arrangement 11.2 measures more slowly than the first sensor arrangement 11.1.
- This exact sensor signal which, however, changes slowly to the new value when the intake air mass changes, is converted by the second control unit 10.2.1 into a second manipulated variable which is identical to the first manipulated variable, a signal which is suitable a fuel injection pump like that.
- this second manipulated variable is not supplied to the adjusting section 12.1 designed as a fuel injection pump, but rather to the calibration unit 15, which (as a rule computationally) realizes the functions of a comparator, a signal converter and a sample / sample. Circuit.
- the calibration unit 15 determines whether the first manipulated variable, which was determined on the basis of signals from the less precise first sensor arrangement, deviates from the more precise second manipulated variable.
- the calibration unit 15 also determines whether the first manipulated variable remained within a predetermined range in a time period which corresponds at least to the settling time of the second sensor arrangement 11.2.
- the difference signal of the first manipulated variable and the second manipulated variable or a signal converted to the differential signal is output to the first control unit 10.1.1 via the Sa pl e / Hol d function. If the first manipulated variable then swings within the predefined time span by more than it corresponds to the predefined percentage frame, the sample / hold function holds the value that was last output when there were still quasi-steady states.
- the value output by the calibration unit 15 influences the first control unit 10.1.1 in such a way that it changes the first manipulated variable in one direction so that the value of the first manipulated variable is adapted to the value of the second manipulated variable.
- the first control unit 10.1.1 multiplies the previously given value of the first manipulated variable by a factor of 1.02.
- the first manipulated variable is determined almost throughout the entire operating time of the arrangement according to FIG. 2 with an accuracy which corresponds to the high measuring accuracy of the second sensor arrangement, but with the high consequence of changes in the input variables ndi gkei t changed, which corresponds to the setting speed of the first sensor arrangement.
- control unit 10.1.1 for emitting the first manipulated variable, as shown in the setting 1 arrangement according to FIG. 3, or a control unit.
- control unit 10.2.2 for delivering the second manipulated variable, as shown in the arrangement according to FIG. 4.
- the arrangement according to FIG. 3 differs from that according to FIG. 2 in that an output sensor 13.1 is additionally present which detects the output variable of the element! measures distance 12.1 or a quantity dependent thereon and outputs its output signal to the already mentioned control unit 10.1.2, which replaces the control unit 10.1.1.
- the control unit 10.1.2 carries out a regulation to a value dependent on the output signal of the first sensor arrangement 11.1. With this regulation the output signal! is compared by the output sensor 13.1 with a setpoint value which is fed to the control unit 10.1.2.
- the setting 1 arrangement according to FIG. 4 with the embodiment of a setting 1 system 14 just described has a configuration which corresponds to the configuration of the arrangement according to FIG. 2, it is advantageous to use the output sensor as a lambda Training probe.
- the entire arrangement then functions like the arrangement according to FIG. 2, but functions in accordance with the rule described above.
- the arrangement according to FIG. 3 described output sensor 13.1 its output signal to the above-mentioned control unit 10.2.2, which, based on the embodiment according to FIG. 2, replaces the second control unit 10.2.1.
- a setpoint is supplied to the second control unit l ⁇ ' .2.2.
- This arrangement means that the control unit 10.1.1 no longer receives a controlled calibration value for outputting the first manipulated variable, but rather a regulated one.
- the first manipulated variable also has a control character, although it is only controlled by the control unit 10.1.1 as a function of values as measured by the first sensor arrangement 11.1.
- the question of when it is more advantageous to regulate the first setting unit and when it is more advantageous to regulate the second setting 1 largely depends on the time behavior of the sensors used in the overall arrangement. You choose the regulation in the branch that tends to oscillate less due to its time behavior.
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)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3729635 | 1987-09-04 | ||
DE19873729635 DE3729635A1 (de) | 1987-09-04 | 1987-09-04 | Einstellsystem (steuerung- und/oder regelungssystem) fuer kraftfahrzeuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0375710A1 true EP0375710A1 (de) | 1990-07-04 |
EP0375710B1 EP0375710B1 (de) | 1992-01-22 |
Family
ID=6335245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880907097 Expired - Lifetime EP0375710B1 (de) | 1987-09-04 | 1988-08-05 | Einstellsystem (steuerungs- und/oder regelungssystem) für kraftfahrzeuge |
Country Status (6)
Country | Link |
---|---|
US (1) | US5050560A (de) |
EP (1) | EP0375710B1 (de) |
JP (1) | JP2735591B2 (de) |
KR (1) | KR0121326B1 (de) |
DE (2) | DE3729635A1 (de) |
WO (1) | WO1989002030A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999014475A1 (de) | 1997-09-17 | 1999-03-25 | Robert Bosch Gmbh | Verfahren und eine vorrichtung zur steuerung eines gasflusses über ein drosselventil in einem verbrennungsmotor |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2816758B2 (ja) * | 1990-09-07 | 1998-10-27 | 株式会社日立製作所 | ファジイ推論を用いた流量測定装置及び方法 |
US5190020A (en) * | 1991-06-26 | 1993-03-02 | Cho Dong Il D | Automatic control system for IC engine fuel injection |
US5150692A (en) * | 1991-12-16 | 1992-09-29 | General Motors Corporation | System for controlling air supply pressure in a pneumatic direct fuel injected internal combustion engine |
US5537981A (en) * | 1992-05-27 | 1996-07-23 | Siemens Aktiengesellschaft | Airflow error correction method and apparatus |
JP3168355B2 (ja) * | 1992-08-17 | 2001-05-21 | 株式会社ユニシアジェックス | 内燃機関の空燃比制御装置 |
US5492106A (en) * | 1994-12-27 | 1996-02-20 | Ford Motor Company | Jump-hold fuel control system |
US6370935B1 (en) | 1998-10-16 | 2002-04-16 | Cummins, Inc. | On-line self-calibration of mass airflow sensors in reciprocating engines |
DE10039785B4 (de) * | 2000-08-16 | 2014-02-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
US6636796B2 (en) | 2001-01-25 | 2003-10-21 | Ford Global Technologies, Inc. | Method and system for engine air-charge estimation |
DE20102002U1 (de) * | 2001-02-06 | 2001-04-26 | J. Eberspächer GmbH & Co., 73730 Esslingen | Flüssigkeitszudosiersystem |
US20030105536A1 (en) * | 2001-12-04 | 2003-06-05 | Eastman Kodak Company | Open and closed loop flow control system and method |
FR2874054B1 (fr) * | 2004-08-04 | 2006-11-24 | Peugeot Citroen Automobiles Sa | Procede et systeme de supervision du calibrage d'une chaine d'acquisition de pression dans un cylindre d'un moteur diesel |
US8224519B2 (en) | 2009-07-24 | 2012-07-17 | Harley-Davidson Motor Company Group, LLC | Vehicle calibration using data collected during normal operating conditions |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57193760A (en) * | 1981-05-22 | 1982-11-29 | Hitachi Ltd | Fuel controller |
US4562814A (en) * | 1983-02-04 | 1986-01-07 | Nissan Motor Company, Limited | System and method for controlling fuel supply to an internal combustion engine |
JPS60178952A (ja) * | 1984-02-27 | 1985-09-12 | Mitsubishi Electric Corp | 内燃機関の燃料噴射制御装置 |
JPS6158945A (ja) * | 1984-08-29 | 1986-03-26 | Nissan Motor Co Ltd | 内燃機関の燃料噴射制御装置 |
US4644474A (en) * | 1985-01-14 | 1987-02-17 | Ford Motor Company | Hybrid airflow measurement |
JPS6278449A (ja) * | 1985-10-02 | 1987-04-10 | Mitsubishi Electric Corp | 内燃機関の燃料噴射制御装置 |
JPH0827203B2 (ja) * | 1986-01-13 | 1996-03-21 | 日産自動車株式会社 | エンジンの吸入空気量検出装置 |
KR930000347B1 (ko) * | 1988-04-28 | 1993-01-16 | 가부시기가이샤 히다찌세이사꾸쇼 | 내연기관용 공연비제어장치 |
-
1987
- 1987-09-04 DE DE19873729635 patent/DE3729635A1/de not_active Withdrawn
-
1988
- 1988-08-05 DE DE8888907097T patent/DE3868071D1/de not_active Expired - Lifetime
- 1988-08-05 KR KR1019890700776A patent/KR0121326B1/ko not_active IP Right Cessation
- 1988-08-05 WO PCT/DE1988/000483 patent/WO1989002030A1/de active IP Right Grant
- 1988-08-05 JP JP63506341A patent/JP2735591B2/ja not_active Expired - Fee Related
- 1988-08-05 EP EP19880907097 patent/EP0375710B1/de not_active Expired - Lifetime
- 1988-08-05 US US07/490,666 patent/US5050560A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8902030A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999014475A1 (de) | 1997-09-17 | 1999-03-25 | Robert Bosch Gmbh | Verfahren und eine vorrichtung zur steuerung eines gasflusses über ein drosselventil in einem verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
DE3868071D1 (de) | 1992-03-05 |
EP0375710B1 (de) | 1992-01-22 |
WO1989002030A1 (en) | 1989-03-09 |
KR890701883A (ko) | 1989-12-22 |
DE3729635A1 (de) | 1989-03-16 |
JP2735591B2 (ja) | 1998-04-02 |
JPH03500563A (ja) | 1991-02-07 |
KR0121326B1 (ko) | 1997-11-24 |
US5050560A (en) | 1991-09-24 |
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