WO2001009504A1 - Verfahren zum betreiben einer brennkraftmaschine insbesondere eines kraftfahrzeugs - Google Patents
Verfahren zum betreiben einer brennkraftmaschine insbesondere eines kraftfahrzeugs Download PDFInfo
- Publication number
- WO2001009504A1 WO2001009504A1 PCT/DE2000/001996 DE0001996W WO0109504A1 WO 2001009504 A1 WO2001009504 A1 WO 2001009504A1 DE 0001996 W DE0001996 W DE 0001996W WO 0109504 A1 WO0109504 A1 WO 0109504A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tank
- activated carbon
- carbon filter
- value
- model
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0854—Details of the absorption canister
-
- 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
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0045—Estimating, calculating or determining the purging rate, amount, flow or concentration
-
- 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
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
-
- 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
- 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
- F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
- F02D41/0042—Controlling the combustible mixture as a function of the canister purging, e.g. control of injected fuel to compensate for deviation of air fuel ratio when purging
Definitions
- the invention relates to a method for operating an internal combustion engine, in particular a motor vehicle, in which a mixture of air and fuel from a tank is supplied to a combustion chamber via an activated carbon filter and via a tank ventilation valve.
- the invention also relates to a control device for an internal combustion engine and an internal combustion engine, in particular for a motor vehicle.
- the tank ventilation system that functions in this way has the task, in particular, of the entire combustion mixture to maintain the desired degree of fatness, regardless of how far the Aktivkohlefil he is saturated with hydrocarbons. For this purpose, the amount of fuel injected is correspondingly reduced when the tank ventilation valve is open.
- a current hydrocarbon concentration of the regeneration gas flow - also called loading - can be adapted and the injected fuel quantity based on this current hydrocarbon concentration be corrected or controlled and / or regulated.
- This adaptation of the hydrocarbon concentration of the regeneration gas flow cannot take place as quickly as desired, since the delay time of the distance between the respective injection valve and the lambda probe in the exhaust gas flow limits the maximum adaptation speed.
- the physical hydrocarbon concentration curve is not continuous. In particular, jumps in concentration occur when the
- Activated carbon filtering does not have sufficient buffering and the regeneration gas mass flow z.
- the object is also achieved in a corresponding manner in a control device or an internal combustion engine of the type mentioned at the outset.
- a tank outgassing model that adapts the hydrocarbon gas production in the tank and / or a model of the activated carbon filter is provided in order to use the tank outgassing model and / or the model of the activated carbon filter to determine the hydrocarbon concentration to predict the location of the tank ventilation valve and, based on this prediction, to generate the correction value safely and quickly even after breaks in regeneration, so that
- Lambda deviations in dynamic engine operation can be reduced to such an extent that even a sensitive driver cannot perceive them.
- control element which is provided for a control device of an internal combustion engine, in particular a motor vehicle.
- a program is stored on the control element, which is executable on a computing device, in particular on a microprocessor, and is suitable for executing the method according to the invention.
- the invention is thus implemented by a program stored on the control element, so that this control element provided with the program represents the invention in the same way as the method, for the execution of which the program is suitable.
- an electrical storage medium can be used as the control element, for example a read-only memory or a flash memory.
- FIG. 1 schematically shows, in the form of functional blocks, an overview of a system with tank ventilation, which executes a preferred exemplary embodiment of the control method
- FIG. 2 shows schematically functional blocks of the functional block 10 according to FIG. 1, which contains the tank outgassing model and the model of the activated carbon filter, and
- Figure 3 shows schematically a for calculating the Activated carbon filter model serving volume flow model.
- the exemplary embodiment describes the control and / or regulating method according to the invention by way of example for a motor vehicle gasoline engine with direct injection, and the method has a combination of an activated carbon filter model with a tank outgassing model.
- a gasoline engine 1 is shown by (not shown)
- Injection valves injected an injection quantity rk determined using the control method according to the invention, which as a function of a control rlp, a lambda setpoint (lamsbg), an output variable for a with a lambda probe 7 in the exhaust pipe 6 of the
- Gasoline engine 1 connected lambda control 8 and a correction term of a tank ventilation system 9 is calculated.
- An electrically controllable tank ventilation valve (TEV) 2 is provided in a pipe leading from a (not shown) gas tank via an activated carbon filter (also not shown), which is acted upon by a signal tateout in the tank ventilation phases.
- the regeneration gas flow through the TEV 2 is admixed to the air flow sucked in by the gasoline engine 1 in a suction pipe 4 downstream of a throttle valve.
- An exhaust gas recirculation valve 3 is also provided in an exhaust gas recirculation pipe 5.
- a block 11 calculates a desired flushing current, which in the form of the signal stesoll is fed to a block 12, which calculates the duty cycle of the signal tateout required for the tank ventilation phases by the tank ventilation valve 2 and outputs this signal tateout to the TEV 2.
- the correction issued by the tank ventilation system 9 erm The correction or regulation of the injected fuel quantity rk is calculated in a function block 13 from the actual mass flow mste of the TEV 2 and the current hydrocarbon concentration or loading ftead of the regeneration gas flow.
- rkte mste / (nmot x KUMSRL) x ftead, where mste is an actual TEV mass flow, ftead is a hydrocarbon concentration of
- Regeneration gas with a value range of (0 ... 30), nmot an engine speed and
- KUMSRL are a conversion constant for the air mass in relative filling.
- the input variable of function block 10 is a product called fkakormt from a lambda control value frm and the relative lambda deviation of an actual lambda value (lamsoni) from a lambda setpoint (lamsons).
- FIG. 2 shows details of the function block 10, which forms an "observer” for the hydrocarbon concentration of the regeneration gas and, as essential components, the tank outgassing model 102, which adapts the hydrocarbon gas production in the tank, and the activated carbon feeder model 103, which models the behavior of an activated carbon filter.
- the branch consisting of the tank degassing model 102, the activated carbon filter model 103 and a delay unit 104 generates a predictive value khctev for the one to be expected at the TEV 2
- the delay unit 104 delays the predictive value khcakf of the activated carbon filter model by the gas transport time from the activated carbon filter to the tank ventilation valve 2.
- the delayed predictive value khctev is compared with the im
- Integration block 101 produced fast adaptation value dkhc of the hydrocarbon concentration to the load ftead, which represents the output value of function block 10, i. H. the hydrocarbon concentration of the regeneration gas. This is done as follows:
- khcobs is the sum of the fast adaptation value dkhc and that of Delay element 104 output value khctev calculated.
- the block 10 predicting the hydrocarbon concentration of the regeneration gas stream at the TEV 2 has the following function:
- a current deviation between a physical hydrocarbon concentration and a hydrocarbon concentration ftead calculated in the tank ventilation function results in a mixture correction factor fkakormt ⁇ 1.0.
- the course of the hydrocarbon concentration can be predicted with the aid of the method according to the invention. There is, so to speak, a feedforward control for the hydrocarbon concentration. As a result, lambda sensors are significantly smaller during tank ventilation.
- FIG. 3 shows a volume flow model of the activated carbon filter.
- Input variables in the activated carbon filter model 103 are: - Mass flow rate sucked out by the TEV 2.
- the starting variable is the hydrocarbon concentration khcakf at the outlet of the activated carbon filter.
- volume flow right chamber in coal mkgepu / (ro_Kr * ftho) volume flow (hydrocarbon + air) left chamber made of coal: vg ⁇ st ⁇
- ro_Lu Standard density air at 0 degrees Celsius and 1013 mbar ftho:
- the activated carbon filter is divided into a carbon half and an air half.
- the air half is in turn divided into a right half (inflow from tank) and a left half (outflow towards TEV).
- mkugep mste mkausg MIN (, * [1-fakpuf]) ro Kr norm * ftho ftho 2 * ftho
- the flush volume flow is composed of air and fuel vapor. Only the fuel vapor flow mksp is of interest, but first the entire volume flow must be considered:
- Total particle flow air flow + proportional portion of fuel vapor flow
- the desorption component can also become negative (KAKFAD has negative values).
- the degree of buffer, the storage capacity and the ease of desorption of the activated carbon are application parameters. This allows the model to be adapted to all common activated carbon filters.
- Regulating procedures used activated carbon filter model can be at low speed values and fully loaded activated carbon filter during the tank ventilation phases by observing the injection time and the duty cycle tateout of the TEV 2 z. B. observe with the help of an oscilloscope, if the air mass of the engine has been recorded beforehand and a basic injection time has been calculated. The deviation of the actual injection time from the minimum injection time is a measure of the correction of the tank ventilation with the hip of the activated carbon filter mode 11s. The mass flow through the tank ventilation valve must be recorded.
- the load adapted in the control unit is now the proportionality factor between mass flow and injection reduction. According to the method according to the invention, this proportionality factor must be smaller in the case of positive load jumps.
- the above functional verification of the function of the activated carbon filter by observing the injection time and the duty cycle on the TEV 2 can be carried out particularly in vehicles with an unbuffered activated carbon filter.
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)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001513747A JP2003506610A (ja) | 1999-07-31 | 2000-06-16 | 内燃機関の作動方法 |
US10/048,745 US6523532B1 (en) | 1999-07-31 | 2000-06-16 | Method for operating an internal combustion engine, especially of a motor vehicle |
KR1020027001302A KR20020031395A (ko) | 1999-07-31 | 2000-06-16 | 자동차 내연 기관 작동 방법 |
EP00947815A EP1203149B1 (de) | 1999-07-31 | 2000-06-16 | Verfahren zum betreiben einer brennkraftmaschine insbesondere eines kraftfahrzeugs |
DE50012133T DE50012133D1 (de) | 1999-07-31 | 2000-06-16 | Verfahren zum betreiben einer brennkraftmaschine insbesondere eines kraftfahrzeugs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19936166A DE19936166A1 (de) | 1999-07-31 | 1999-07-31 | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
DE19936166.5 | 1999-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001009504A1 true WO2001009504A1 (de) | 2001-02-08 |
Family
ID=7916803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/001996 WO2001009504A1 (de) | 1999-07-31 | 2000-06-16 | Verfahren zum betreiben einer brennkraftmaschine insbesondere eines kraftfahrzeugs |
Country Status (7)
Country | Link |
---|---|
US (1) | US6523532B1 (de) |
EP (1) | EP1203149B1 (de) |
JP (1) | JP2003506610A (de) |
KR (1) | KR20020031395A (de) |
CN (1) | CN1160512C (de) |
DE (2) | DE19936166A1 (de) |
WO (1) | WO2001009504A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4400003B2 (ja) * | 2001-04-23 | 2010-01-20 | トヨタ自動車株式会社 | エンジンの空燃比制御方法 |
DE10126521B4 (de) * | 2001-05-30 | 2006-05-04 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Tankleckdiagnose bei erhöhter Brennstoffausgasung |
DE10165007B4 (de) * | 2001-11-27 | 2009-08-27 | Sartorius Stedim Biotech Gmbh | Filtrationssystem zur Durchführung und Überwachung eines Filtrationsprozesses von Fluiden |
DE10310109B4 (de) * | 2003-03-06 | 2009-08-20 | Carl Freudenberg Kg | Anordnung zum dosierten Einspeisen von flüchtigen Kraftstoffbestandteilen, insbesondere in das Ansaugrohr einer Verbrennungskraftmaschine eines Kraftfahrzeugs |
AT413738B (de) * | 2004-02-09 | 2006-05-15 | Ge Jenbacher Gmbh & Co Ohg | Verfahren zum regeln einer brennkraftmaschine |
US7305975B2 (en) * | 2004-04-23 | 2007-12-11 | Reddy Sam R | Evap canister purge prediction for engine fuel and air control |
DE102004057210B4 (de) * | 2004-11-26 | 2011-12-22 | Continental Automotive Gmbh | Verfahren zur Regelung einer Tankentlüftung |
DE102007046482B4 (de) * | 2007-09-28 | 2009-07-23 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Korrektur der Kraftstoffkonzentration im Regeneriergasstrom einer Tankentlüftungsvorrichtung |
DE102011086221A1 (de) * | 2011-11-11 | 2013-05-16 | Robert Bosch Gmbh | Optimierung einer Tankentlüftung eines Kraftstofftanks |
US20160084135A1 (en) * | 2014-09-22 | 2016-03-24 | Caterpillar Inc. | Catalyst Protection Against Hydrocarbon Exposure |
DE102015213280A1 (de) * | 2015-07-15 | 2017-01-19 | Robert Bosch Gmbh | Verfahren zur Ermittlung eines Füllstandes eines Kraftstoffdampf-Zwischenspeichers |
DE102017209127A1 (de) * | 2017-05-31 | 2018-12-06 | Robert Bosch Gmbh | Verfahren zum Berechnen eines Massenstroms von einem Tankentlüftungssystem in ein Saugrohr eines Verbrennungsmotors |
DE102018220403A1 (de) * | 2018-11-28 | 2020-05-28 | Robert Bosch Gmbh | Tankentlüftungssystem und Verfahren zum Ermitteln einer Kohlenwasserstoffbeladung und/oder eines Kohlenwasserstoffstroms in dem Tankentlüftungssystem |
DE102020213839A1 (de) | 2020-11-04 | 2022-05-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren und elektronisches Steuergerät zum Betreiben eines Verbrennungsmotors |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5072712A (en) * | 1988-04-20 | 1991-12-17 | Robert Bosch Gmbh | Method and apparatus for setting a tank venting valve |
EP0691469A1 (de) * | 1994-07-05 | 1996-01-10 | Regie Nationale Des Usines Renault S.A. | Verfahren zum steuern eines Innenverbrennungsmotors mit Tankentlüftungssystem |
US5553595A (en) * | 1994-03-30 | 1996-09-10 | Mazda Motor Corporation | Fuel system with fuel vapor estimating feature |
EP0810367A2 (de) * | 1996-05-30 | 1997-12-03 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffdampfverarbeitungsgerät für Brennkraftmaschine |
US6047688A (en) * | 1999-01-15 | 2000-04-11 | Daimlerchrysler Corporation | Method of determining the purge canister mass |
EP1020634A2 (de) * | 1999-01-15 | 2000-07-19 | DaimlerChrysler Corporation | Verfahren für das Abschätzen von Veränderungen der Dampfentlüftungsmenge |
Family Cites Families (13)
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JPS6430508A (en) * | 1987-07-28 | 1989-02-01 | Kubota Ltd | Combine |
JP2515709B2 (ja) * | 1987-12-25 | 1996-07-10 | ミヤコ自動車工業 株式会社 | 駐車用ブレ―キの駆動装置 |
DE3822300A1 (de) * | 1988-07-01 | 1990-01-04 | Bosch Gmbh Robert | Verfahren und vorrichtung zur tankentlueftungsadaption bei lambdaregelung |
US5048492A (en) * | 1990-12-05 | 1991-09-17 | Ford Motor Company | Air/fuel ratio control system and method for fuel vapor purging |
GB2293660B (en) * | 1992-07-09 | 1996-09-25 | Fuji Heavy Ind Ltd | Control method for purging fuel vapor of automotive engine |
JP3194670B2 (ja) * | 1994-06-30 | 2001-07-30 | 三菱電機株式会社 | 内燃機関の電子制御装置 |
JP3269751B2 (ja) * | 1995-06-22 | 2002-04-02 | 株式会社日立製作所 | 内燃機関制御装置 |
JPH09329044A (ja) * | 1996-06-13 | 1997-12-22 | Fuji Heavy Ind Ltd | エンジンの蒸発燃料パージ装置 |
WO1997027392A1 (fr) * | 1996-01-23 | 1997-07-31 | Toyota Jidosha Kabushiki Kaisha | Systeme de traitement d'un carburant volatil pour un moteur a plusieurs cylindres |
DE19648688B4 (de) * | 1996-11-25 | 2006-11-09 | Robert Bosch Gmbh | Verfahren zur Erfassung der Füllstandsmenge eines Tanksystems |
DE19701353C1 (de) * | 1997-01-16 | 1998-03-12 | Siemens Ag | Verfahren zur Tankentlüftung bei einer Brennkraftmaschine |
GB2329218A (en) * | 1997-09-13 | 1999-03-17 | Ford Global Tech Inc | Purging a fuel vapour canister of an i.c. engine and cooling air/vapour mixture to provide a saturated flow |
US6321735B2 (en) * | 1999-03-08 | 2001-11-27 | Delphi Technologies, Inc. | Fuel control system with purge gas modeling and integration |
-
1999
- 1999-07-31 DE DE19936166A patent/DE19936166A1/de not_active Ceased
-
2000
- 2000-06-16 US US10/048,745 patent/US6523532B1/en not_active Expired - Fee Related
- 2000-06-16 WO PCT/DE2000/001996 patent/WO2001009504A1/de not_active Application Discontinuation
- 2000-06-16 CN CNB008111952A patent/CN1160512C/zh not_active Expired - Fee Related
- 2000-06-16 KR KR1020027001302A patent/KR20020031395A/ko not_active Application Discontinuation
- 2000-06-16 EP EP00947815A patent/EP1203149B1/de not_active Expired - Lifetime
- 2000-06-16 JP JP2001513747A patent/JP2003506610A/ja active Pending
- 2000-06-16 DE DE50012133T patent/DE50012133D1/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072712A (en) * | 1988-04-20 | 1991-12-17 | Robert Bosch Gmbh | Method and apparatus for setting a tank venting valve |
US5553595A (en) * | 1994-03-30 | 1996-09-10 | Mazda Motor Corporation | Fuel system with fuel vapor estimating feature |
EP0691469A1 (de) * | 1994-07-05 | 1996-01-10 | Regie Nationale Des Usines Renault S.A. | Verfahren zum steuern eines Innenverbrennungsmotors mit Tankentlüftungssystem |
EP0810367A2 (de) * | 1996-05-30 | 1997-12-03 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffdampfverarbeitungsgerät für Brennkraftmaschine |
US6047688A (en) * | 1999-01-15 | 2000-04-11 | Daimlerchrysler Corporation | Method of determining the purge canister mass |
EP1020634A2 (de) * | 1999-01-15 | 2000-07-19 | DaimlerChrysler Corporation | Verfahren für das Abschätzen von Veränderungen der Dampfentlüftungsmenge |
Also Published As
Publication number | Publication date |
---|---|
JP2003506610A (ja) | 2003-02-18 |
CN1367863A (zh) | 2002-09-04 |
KR20020031395A (ko) | 2002-05-01 |
EP1203149B1 (de) | 2006-01-25 |
DE19936166A1 (de) | 2001-02-08 |
DE50012133D1 (de) | 2006-04-13 |
EP1203149A1 (de) | 2002-05-08 |
US6523532B1 (en) | 2003-02-25 |
CN1160512C (zh) | 2004-08-04 |
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