WO2010037658A1 - Procede de demarrage d'un moteur a combustion interne - Google Patents
Procede de demarrage d'un moteur a combustion interne Download PDFInfo
- Publication number
- WO2010037658A1 WO2010037658A1 PCT/EP2009/062205 EP2009062205W WO2010037658A1 WO 2010037658 A1 WO2010037658 A1 WO 2010037658A1 EP 2009062205 W EP2009062205 W EP 2009062205W WO 2010037658 A1 WO2010037658 A1 WO 2010037658A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- engine
- vaporize
- tank
- value
- 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
- 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
-
- 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
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- 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
- F02D41/2487—Methods for rewriting
- F02D41/2493—Resetting of data to a predefined set of values
-
- 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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0611—Fuel type, fuel composition or fuel quality
- F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
Definitions
- the invention relates to a starting method of an internal combustion engine for a motor vehicle.
- the invention aims to reduce pollutant emissions at the source, gasoline engines especially during cold starts.
- the quality of the fuel used for the vehicles is very variable, particularly depending on the geographical area where the vehicle is traveling.
- a particularly variable physical property of fuel is its ability to vaporize. This capacity is well known in the Anglo-Saxon literature under the acronym PVR for Steam Pressure Raid. This acronym will be used in the following description of the invention.
- PVR Steam Pressure Raid
- a gasoline engine needs to have a mixture of air and gasoline close to a stoichiometric mixture. This assumes that the amount of fuel in gaseous form is well controlled. However, according to the PVR of the fuel, the amount of fuel in gaseous form participating in the cold start combustion and in the engine actuation varies enormously for the same quantity of fuel injected.
- Another method is to measure the time required for the starter to start the engine. This duration can be calibrated according to different types of fuels.
- the vehicle comprises a fuel tank.
- the filling operations of the tank are carried out with the engine stopped and when starting after filling, the last estimate of the fuel capacity to vaporize is not representative of the fuel actually present in the tank after filling.
- the last estimate gives an HPVR fuel
- the tank was almost empty and a full tank of fuel was made with a fuel BPVR.
- the fuel present in the tank after filling is very close to a BPVR fuel and we may not start the engine, especially in cold weather using the latest estimate.
- the invention aims to overcome this problem by proposing to ignore the latest estimate of the fuel capacity to vaporize when filling the tank.
- the invention relates to a starting method of an internal combustion engine, in particular for a vehicle, and more particularly for a motor vehicle, the engine using fuel stored in a tank.
- This method includes an estimate of the amount of fuel present in the tank, an estimate of a fuel vaporization capacity (PVR), and an adjustment of the amount of fuel to be injected into a cylinder of the engine, when the fuel is started.
- engine according to the estimated capacity to vaporize the fuel and is characterized by the replacement of the estimated value of the ability to vaporize the fuel by a given value for any start immediately following a fuel refill in the tank.
- the reset of the PVR value can be performed from the initial moment of the start command.
- this reset will be performed after a period of time during which, one will continue to use the value the ability to vaporize the estimated fuel before the fuel refill.
- the engine is initially powered by fuel present in the ducts between the tank and the engine, so a fuel corresponding to the previous full.
- This delay can be for example defined as a given period of time or from a count of the number of top dead centers or any other value that can be associated with the rotation of the engine crankshaft.
- the ability to vaporize the fuel can vary between two extreme values and advantageously the value given is an average of the two extreme values.
- These two extreme values may for example be chosen by reference to more or less volatile fuels marketed in a traffic region of the vehicle, or by reference to a range of fuel quality recommended for the engine.
- the value given may be a function of a motor temperature.
- a map may be used to assign a given value taking into account this temperature.
- the value given is for example fixed during the construction of the vehicle.
- the ability to vaporize the estimated fuel before filling is used for a subsequent start filling the tank, the ability to vaporize the estimated fuel before filling.
- the estimated value is replaced by the value given after fuel injection into the engine of a given quantity of fuel and the quantity given advantageously corresponds to a quantity of fuel included in the pipes of the vehicle and making it possible to bring the fuel from the tank to the engine cylinder (s).
- FIG. 1 illustrates in block diagram form an exemplary method according to the invention
- FIG. 2 represents in more detail and in the form of an algorithm, a portion of the method illustrated with reference to FIG.
- the gradient 10 is given for a fuel having a low vaporizing ability or BPVR fuel and the gradient 11 is given for a fuel having a high capacity to vaporize or HPVR fuel.
- Each gradient 10 and 1 1 is expressed in the form of a table whose inputs are a temperature of the engine and a number of turns made by the engine since the first combustion, for example expressed by counting the passage of one of the cylinders of the engine to its top dead center, noted “Nb PMH” in the figure.
- the temperature of the engine is for example that of a cooling fluid of the engine, denoted "water” at the input of the gradients 10 and 11.
- the data from each gradient, given 12 for the gradient 10 and given 13 for the gradient 11 form two inputs of a function 14 for defining a gradient 15 of the fuel present in the reservoir according to an estimate 16 the ability to vaporize fuel, estimate made during a previous engine start.
- the estimate 16 forms a third input of the function 14.
- the gradient 15 makes it possible to define by means of a function 17 a mass of fuel 18 to be injected into the engine to cause the next explosion in the engine
- the function 17 makes it possible to ignore the gradient 15 in the case where a tank of the vehicle, tank containing the fuel, has been filled.
- information item 19 denoted "Reset” becomes active and function 17 replaces the gradient 15 by a given value 20 which is no longer a function of the estimate 16.
- the given value 20 can be fixed at the time of construction of the vehicle.
- the value given is for example equal to an average of the two data 12 and 13. More specifically, the two data 12 and 13 are added by means of a first operator 21 whose result is divided by two by means of a second operator 22. Thus, in the event of detection of a filling of the fuel tank, the information 19 is activated and the function 17 no longer determines the mass of fuel
- FIG. 2 represents in more detail and in the form of an algorithm, the activation of the information item 19 denoted "Reset” as well as a backup strategy in the event that an engine start would fail after replacement of the gradient 15 by the value given 20.
- the vehicle is usually equipped with a sensor measuring the fuel level in the tank. This probe can be used to detect the filling of the tank.
- the detection occurs for example when an instantaneous variation of the level of the reservoir exceeds a predefined positive threshold.
- the determination of the mass of fuel to be injected now uses the data 20 to replace the gradient 15.
- the activation of information 19 differs as long as the fuel located between the reservoir and the engine has not been entirely consumed by the engine. Indeed, the fuel present in the pipes and the fuel pump located between the reservoir and the engine does not mix with the fuel added during filling and the last estimate 16 of the ability to vaporize the fuel still remains valid for the fuel located between the tank and the engine.
- This difference between the detection of the filling of the reservoir and the activation of the information 19 made to the frame 32 is for example made by summing all fuel volumes injected into the engine after detection of the filling. This summation is represented in frame 34. When the result of this summation reaches a calibrated volume, the activation operation of the information 19 is authorized.
- the calibrated volume can be defined during the construction of the vehicle and corresponds to the fuel not yet consumed by the engine and not being mixed with fuel added to the tank during the filling operation. A test comparing the result of the summation to the calibrated volume is shown in box 35.
- This backup strategy starts with a monitoring of the success of the start 33. This monitoring can be carried out by a test 36 verifying whether one or more explosions have occurred in a cylinder of the engine in a predefined time starting at the initialization of the start 33.
- the predefined duration can be expressed in number of PMH. If the start 33 has been successful, it returns to the inactive state of the information 19 to the frame 30. If on the contrary, the startup failed, the frame 37 is again modified the value of PVR to be taken into account by the function 17 to determine a mass of fuel 18 to be injected. For example, the data 12 representative of a BPVR fuel is applied, which makes it possible to increase the richness of the air-fuel mixture and thus to reduce the risk of absence of starting. After the application of this new value of PVR, it is again a start 38 before returning to the inactive state of the information 19 to the frame 30. During startup 38, it is estimated a new value of ability to vaporize fuel present in the tank after filling thereof. This new estimate will be taken into account by function 17 through function 14.
- the tank is filled with BPVR fuel.
- the start following the tank fill detection and use of the fuel located between the tank and the engine will use an average value of PVR to determine the mass of fuel to be injected and in case of failure, a low value of PVR. .
- This strategy makes it possible to limit the emission of pollutants and to gradually lower the value of PVR taken into account.
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
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980138818.7A CN102959214B (zh) | 2008-09-30 | 2009-09-21 | 内燃机的起动方法 |
RU2011117537/07A RU2507408C2 (ru) | 2008-09-30 | 2009-09-21 | Способ запуска двигателя внутреннего сгорания |
BRPI0913546-4A BRPI0913546B1 (pt) | 2008-09-30 | 2009-09-21 | método de partida de um motor à combustão interna e sua aplicação |
EP09783244.8A EP2329122B1 (fr) | 2008-09-30 | 2009-09-21 | Procede de demarrage d'un moteur a combustion interne |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR08/56550 | 2008-09-30 | ||
FR0856550A FR2936569B1 (fr) | 2008-09-30 | 2008-09-30 | Procede de demarrage d'un moteur a combustion interne. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010037658A1 true WO2010037658A1 (fr) | 2010-04-08 |
Family
ID=40671119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/062205 WO2010037658A1 (fr) | 2008-09-30 | 2009-09-21 | Procede de demarrage d'un moteur a combustion interne |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2329122B1 (fr) |
CN (1) | CN102959214B (fr) |
BR (1) | BRPI0913546B1 (fr) |
FR (1) | FR2936569B1 (fr) |
RU (1) | RU2507408C2 (fr) |
WO (1) | WO2010037658A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9726105B2 (en) * | 2014-12-02 | 2017-08-08 | Ford Global Technologies, Llc | Systems and methods for sensing fuel vapor pressure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5542394A (en) * | 1994-04-15 | 1996-08-06 | Unisia Jecs Corporation | Vehicle engine refueling detection apparatus and method and fuel supply apparatus and method |
US20040069273A1 (en) * | 2002-10-09 | 2004-04-15 | Ford Global Technologies, Inc. | Engine control with fuel quality sensor |
WO2007144745A1 (fr) * | 2006-06-13 | 2007-12-21 | Toyota Jidosha Kabushiki Kaisha | Système de détermination de propriété de combustible et procédé de détermination de propriété de combustible pour un moteur à combustion interne |
EP2053222A1 (fr) * | 2007-10-23 | 2009-04-29 | Peugeot Citroën Automobiles S.A. | Procède de démarrage a froid d'un moteur a combustion interne |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2029124C1 (ru) * | 1989-07-05 | 1995-02-20 | Научно-исследовательский автомобильный и автомоторный институт | Способ управления подачей топлива в двигатель внутреннего сгорания по межцикловой нестабильности процесса сгорания и устройство для его осуществления |
RU1838647C (ru) * | 1991-04-02 | 1993-08-30 | Gromyko Petr S | Устройство управлени подачей топлива в двигатель внутреннего сгорани |
JP2884472B2 (ja) * | 1994-03-23 | 1999-04-19 | 株式会社ユニシアジェックス | 内燃機関の燃料性状検出装置 |
DE19841151A1 (de) * | 1998-09-09 | 2000-03-16 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Betreiben und zur Überwachung einer Brennkraftmaschine |
EP1517024B1 (fr) * | 2003-09-19 | 2007-11-28 | Nissan Motor Company, Limited | Dispositif de détermination des propriétés d'un carburant |
RU2267633C2 (ru) * | 2003-11-24 | 2006-01-10 | Открытое акционерное общество "АВТОВАЗ" | Способ регулирования рабочего процесса двс |
-
2008
- 2008-09-30 FR FR0856550A patent/FR2936569B1/fr active Active
-
2009
- 2009-09-21 RU RU2011117537/07A patent/RU2507408C2/ru not_active IP Right Cessation
- 2009-09-21 WO PCT/EP2009/062205 patent/WO2010037658A1/fr active Application Filing
- 2009-09-21 CN CN200980138818.7A patent/CN102959214B/zh not_active Expired - Fee Related
- 2009-09-21 EP EP09783244.8A patent/EP2329122B1/fr active Active
- 2009-09-21 BR BRPI0913546-4A patent/BRPI0913546B1/pt not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5542394A (en) * | 1994-04-15 | 1996-08-06 | Unisia Jecs Corporation | Vehicle engine refueling detection apparatus and method and fuel supply apparatus and method |
US20040069273A1 (en) * | 2002-10-09 | 2004-04-15 | Ford Global Technologies, Inc. | Engine control with fuel quality sensor |
WO2007144745A1 (fr) * | 2006-06-13 | 2007-12-21 | Toyota Jidosha Kabushiki Kaisha | Système de détermination de propriété de combustible et procédé de détermination de propriété de combustible pour un moteur à combustion interne |
EP2053222A1 (fr) * | 2007-10-23 | 2009-04-29 | Peugeot Citroën Automobiles S.A. | Procède de démarrage a froid d'un moteur a combustion interne |
Also Published As
Publication number | Publication date |
---|---|
RU2507408C2 (ru) | 2014-02-20 |
CN102959214B (zh) | 2015-06-17 |
FR2936569B1 (fr) | 2011-07-22 |
BRPI0913546A2 (pt) | 2015-10-13 |
CN102959214A (zh) | 2013-03-06 |
EP2329122B1 (fr) | 2018-08-29 |
BRPI0913546B1 (pt) | 2019-11-05 |
FR2936569A1 (fr) | 2010-04-02 |
RU2011117537A (ru) | 2012-11-10 |
EP2329122A1 (fr) | 2011-06-08 |
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