EP2776694A1 - Procede de commande d'une alimentation en carburant d'un moteur a combustion interne equipant un vehicule automobile - Google Patents
Procede de commande d'une alimentation en carburant d'un moteur a combustion interne equipant un vehicule automobileInfo
- Publication number
- EP2776694A1 EP2776694A1 EP12794385.0A EP12794385A EP2776694A1 EP 2776694 A1 EP2776694 A1 EP 2776694A1 EP 12794385 A EP12794385 A EP 12794385A EP 2776694 A1 EP2776694 A1 EP 2776694A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- control device
- fuel
- motor vehicle
- 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
-
- 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
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
-
- 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
-
- 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
- F02D41/247—Behaviour for small quantities
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3827—Common rail control systems for diesel engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/16—End position calibration, i.e. calculation or measurement of actuator end positions, e.g. for throttle or its driving actuator
-
- 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
- F02D41/2438—Active learning methods
Definitions
- the invention relates to the field of control methods and devices for a fuel supply of an internal combustion engine. It relates to a method of securing the control of a fuel supply of an internal combustion engine fitted to a motor vehicle. It also relates to a device for implementing such a method.
- An internal combustion engine equipping a motor vehicle includes injectors that are able to deliver a given amount of fuel within respective cylinders that includes the internal combustion engine. In the case where the internal combustion engine is a diesel engine, such an injection is commonly carried out by means of said injectors which are jointly fueled by means of a common rail, so called according to the English terminology. Saxon common rail.
- the motor vehicle is equipped with a computer to implement a control method so that a given injection (or a given injection time) is operated depending eg on the engine speed and the driving state of the accelerator pedal.
- EP 1, 388,661 describes a control method, said strategy of resetting the injector which is intended to be applied in the case where the motor vehicle undergoes a constant deceleration phase.
- This injector resetting strategy includes a step of determining a nominal activation time (EN) of the injector involved in said injection as a function of the injection pressure (Prail) and a nominal amount of fuel. required (Qi). It also includes a step of determining a correction activation time (ET) as a function of the injection pressure (Prail) and the cylinder involved in the injection.
- This control method also comprises a step of determining, in the case where the required nominal fuel quantity (Qi) is less than a predetermined threshold (SQ), a corrected activation time (EC) by correcting said time nominal activation according to said correction activation time (ET).
- This method finally comprises a step of exciting said injector for a time equal to said corrected activation time (EC).
- Said step of determining said correction activation time (ET) comprises the steps of: ⁇ performing, in the presence of a predetermined series of operating conditions of the internal combustion engine, a succession of activations of said activation time injector gradually increasing,
- An object of the present invention is to provide a variant of the so-called zero torque strategy compatible with a registration of the injectors and independent of the error that may exist on the value of the rail pressure.
- a method of monitoring a fuel supply system of an internal combustion engine (1) comprising at least two injector (3) for injecting a quantity (Q) of fuel into a cylinder, said injectors being fed by a common rail, according to which, in the periods during which no torque request is made, it is checked whether a request for recalibration of the injectors is active, and if this is not the case, it is checked whether the quantity of fuel injected is then zero, or in the case of a request for registration of the injectors active, an injection of fuel only during a time limit such that the injection associated with the registration does not produce an inadvertent acceleration.
- an acceleration will typically be considered untimely when its value is greater than 1, 5 ms "2 .
- This limit can be changed depending on the presumed sensitivity of the driver (and on a sporty typed vehicle, the customer is often more able to locate an uncontrolled acceleration, we can then choose to lower this threshold a bit.
- the limit time is calculated assuming that the pressure in the common rail is equal to its limit pressure for which the system is designed.
- this monitoring method does not require new sensors or redundancy of some computers or sensors, and is independent of the reliability of the information on the pressure in the common rail.
- the present invention relates to a method for verifying the control of an injector in a so-called "0 torque"situation; applied to the fuel supply of an internal combustion engine fitted to a motor vehicle.
- This method of checking the control comprises a step of calculating a maximum value of the quantity of fuel to be injected by an injector into a respective cylinder so as not to cause inadvertent acceleration.
- the invention tests whether the injected fuel quantity value is zero when the injector reset function is inactive and that this injected fuel value is less than a threshold calculated according to the maximum error on Prail and ensuring compliance with the inadvertent acceleration.
- the calculation step is dependent on information relating to an activation state of a brake.
- the quantity is calculated according to a corrected opening time of the injector and a maximum injection pressure.
- the quantity is calculated according to a nominal opening time of the injector and the injection pressure.
- a control device of the present invention is a control device for the implementation of such a control method which is mainly recognizable in that the control device comprises a computer equipped with a force sensor equipping the brake.
- the control device advantageously comprises a torque sensor fitted to the internal combustion engine.
- the control device advantageously comprises a pressure sensor equipping a common rail equipping the internal combustion engine.
- a motor vehicle of the present invention is equipped with an internal combustion engine provided with such a control device.
- Figure 1 is a schematic view of a fuel supply control device according to the present invention.
- FIG. 2 is a schematic view of a control method according to the present invention.
- a motor vehicle is equipped with an internal combustion engine 1 to allow movement of the latter.
- the internal combustion engine 1 is preferably a Diesel type engine.
- the internal combustion engine 1 comprises cylinders 2 which are supplied with fuel by respective injectors 3.
- the latter themselves are supplied with fuel by a common rail 4 which jointly delivers the fuel to the injectors 3.
- the common rail 4 is type of those commonly called “common rail” according to the English terminology.
- the common rail 4 is itself supplied with fuel by a high-pressure pump 5 which is interposed on a fuel supply circuit 6 between the common rail 4 and a fuel tank 7.
- the high-pressure pump 5 is suitable to deliver to the common rail the fuel at an injection pressure Prail which can at most reach a maximum injection pressure Pmax which is of the order of 1500 bars.
- the motor vehicle is equipped with a computer 8 which is adapted to implement a method of controlling a fuel supply of the internal combustion engine 1.
- the computer 8 is for example constitutive of an electronic control unit equipping the motor vehicle. More particularly, the computer is able to calculate a quantity Q of fuel that each injector 3 must inject inside the cylinder 2 to which the injector 3 is assigned.
- the computer 8 is in relation with the common rail 4 by means of a pressure sensor 9 able to measure and transmit to the computer 8 the Prail injection pressure taken at the common rail 4.
- the computer 8 is also in connection with the internal combustion engine 1 by means of a torque sensor 10 able to measure and transmit to the computer 8 a motor torque C supplied by the internal combustion engine 1.
- the engine torque C transmitted to the computer 8 is zero.
- the computer 8 is advantageously in relation with a force sensor 1 1 which is able to deliver to the computer 8 INF information relating to an activation state E of a brake 12 equipping the vehicle automobile.
- the brake 12 is a control member accessible to a user of the motor vehicle that is intended to slow down or even stop the motor vehicle, particularly from an action on wheels that includes the motor vehicle.
- the brake 12 is commonly constituted by a pedal operated by means of a foot of the user of the motor vehicle to slow down or even stop the motor vehicle.
- the brake 12 may consist of an equivalent member without departing from the rule of the present invention.
- the brake 12 can be activated according to two distinct states: a first state E1 according to which a bearing on the brake is observed to at least slow down the motor vehicle and a second state E2 according to which no bearing on the brake 12 is noted so as not to slow down the motor vehicle through a voluntary action of the user of the motor vehicle.
- a first state E1 the force sensor 1 1 transmits to the computer a first information INF1.
- a second state E2 the force sensor 1 1 transmits to the computer a second information INF2.
- the control method comprises a calculation step 100 which takes into account the information INF relating to the activation state E of the brake 12 to calculate the quantity Q given of fuel to be delivered by each injectors 3 to the corresponding cylinder, as shown diagrammatically in Figure 2. More particularly, the control method of the present invention is activated if the torque C supplied by the internal combustion engine 1 is zero, that is to say say during a deceleration phase of the motor vehicle.
- the quantity Q is calculated as a function of a corrected opening time Te of the injector 4 and the maximum injection pressure Pmax.
- the computer determines the quantity Q of fuel to be injected as a function of the corrected open time Te of the injector 4 and the maximum injection pressure Pmax.
- the corrected open time Te of the injector 4 is a time determined by the computer 8 which corresponds to a maximum opening time of the injector 3 admissible before a perception by the user of an acceleration.
- the quantity Q is calculated as a function of a nominal opening time Tn of the injector 4 and the Prail injection pressure.
- the nominal opening time Tn of the injector 4 is the running opening time of the injector 4 when the injector 3 receives the fuel at the Prail injection pressure.
- the control method also comprises an injection step 101, which follows the calculation step 100, and during which the calculated amount Q of fuel is injected inside each cylinder 2 by each injector 3 correspondent.
- Such a control method is capable of being implemented under various deceleration conditions of the motor vehicle and / or in phases where the output torque C of the internal combustion engine 1 is zero, such a reassuring method. at most one operation of the internal combustion engine 1 and avoiding an unpleasant feeling for the user of the motor vehicle, the type of untimely acceleration generated in response to the observed deceleration of the motor vehicle.
- Such a control method is implemented by a control device 13 which comprises the computer 8, the pressure sensor 9, the torque sensor 10 and the force sensor 1 1 fitted to the brake 12, such a device 13 control is simple to achieve and install on the motor vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1160250A FR2982644B1 (fr) | 2011-11-10 | 2011-11-10 | Procede de commande d'une alimentation en carburant d'un moteur a combustion interne equipant un vehicule automobile |
| PCT/FR2012/052471 WO2013068670A1 (fr) | 2011-11-10 | 2012-10-26 | Procede de commande d'une alimentation en carburant d'un moteur a combustion interne equipant un vehicule automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2776694A1 true EP2776694A1 (fr) | 2014-09-17 |
| EP2776694B1 EP2776694B1 (fr) | 2016-12-28 |
Family
ID=47263421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12794385.0A Active EP2776694B1 (fr) | 2011-11-10 | 2012-10-26 | Procede de commande d'une alimentation en carburant d'un moteur a combustion interne equipant un vehicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2776694B1 (fr) |
| CN (1) | CN104114838B (fr) |
| FR (1) | FR2982644B1 (fr) |
| WO (1) | WO2013068670A1 (fr) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS611844A (ja) * | 1984-06-15 | 1986-01-07 | Automob Antipollut & Saf Res Center | 燃料噴射装置 |
| DE60022918T2 (de) * | 1999-01-13 | 2006-07-20 | Delphi Technologies, Inc., Troy | Steuerungsverfahren für eine selbstzündende Brennkraftmaschine |
| ITTO20020698A1 (it) | 2002-08-06 | 2004-02-07 | Fiat Ricerche | Metodo e dispositivo di controllo della qualita' |
| DE10302058B4 (de) * | 2003-01-21 | 2016-11-10 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
| EP1813796A3 (fr) * | 2006-01-26 | 2007-12-19 | Delphi Technologies, Inc. | Contrôleur et procédé de contrôle pour une unité de contrôle de moteur |
| DE102006015967A1 (de) * | 2006-04-05 | 2007-10-18 | Siemens Ag | Adaptionsverfahren einer Einspritzanlage einer Brennkraftmaschine |
| DE102006059006B3 (de) * | 2006-12-14 | 2008-06-19 | Mtu Friedrichshafen Gmbh | Einrichtung zur Steuerung einer Brennkraftmaschine |
| FR2910551B1 (fr) * | 2006-12-21 | 2009-02-20 | Renault Sas | Procede de correction des derives des injecteurs d'un moteur |
| FR2917462B1 (fr) * | 2007-06-12 | 2009-09-04 | Renault Sas | Procede de correction des derives des injecteurs d'un moteur |
| JP2010019139A (ja) * | 2008-07-09 | 2010-01-28 | Mazda Motor Corp | 車両用エンジンの制御装置および制御方法 |
| DE102009002793B4 (de) * | 2009-05-04 | 2011-07-07 | MTU Friedrichshafen GmbH, 88045 | Common-Rail-Kraftstoffeinspritzsystem sowie Brennkraftmaschine, Elektronische Einrichtung und Verfahren zur Steuerung und/oder Regelung einer Brennkraftmaschine |
| JP5472004B2 (ja) * | 2010-09-21 | 2014-04-16 | 株式会社デンソー | エンジンの自動始動制御装置 |
-
2011
- 2011-11-10 FR FR1160250A patent/FR2982644B1/fr not_active Expired - Fee Related
-
2012
- 2012-10-26 EP EP12794385.0A patent/EP2776694B1/fr active Active
- 2012-10-26 CN CN201280055423.2A patent/CN104114838B/zh not_active Expired - Fee Related
- 2012-10-26 WO PCT/FR2012/052471 patent/WO2013068670A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013068670A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013068670A1 (fr) | 2013-05-16 |
| CN104114838B (zh) | 2017-02-15 |
| FR2982644B1 (fr) | 2014-01-10 |
| CN104114838A (zh) | 2014-10-22 |
| FR2982644A1 (fr) | 2013-05-17 |
| EP2776694B1 (fr) | 2016-12-28 |
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