EP1013914A1 - Circuit d'alimentation en carburant d'un moteur à combustion interne - Google Patents
Circuit d'alimentation en carburant d'un moteur à combustion interne Download PDFInfo
- Publication number
- EP1013914A1 EP1013914A1 EP99403253A EP99403253A EP1013914A1 EP 1013914 A1 EP1013914 A1 EP 1013914A1 EP 99403253 A EP99403253 A EP 99403253A EP 99403253 A EP99403253 A EP 99403253A EP 1013914 A1 EP1013914 A1 EP 1013914A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- pressure
- fuel
- injectors
- control means
- 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
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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
- 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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
Definitions
- the present invention relates to a circuit fuel supply for a combustion engine internal.
- the invention applies to direct injection engines.
- Power circuits usually encountered in internal combustion engines of motor vehicles include a high pump pressure, a rail of injectors which is supplied with fuel through the high pressure pump and means for controlling the operation of the injectors, the control means now closed the injectors during a fraction of the engine start-up phase and allowing the injectors to open when the pressure in the injector manifold has reached a threshold value predetermined, the control means comprising means which reconstitute the value of the pressure at from an operating model incorporating engine operating parameters.
- the pressure in fuel inside the fuel system can be low due to prolonged shutdown or because it has been intentionally made weak to avoid leakage to injectors when stopped.
- the injectors send fuel into engine cylinders under the form a regular spray pattern.
- the injection is all the better as the fuel admitted in the injectors is high pressure.
- the object of the present invention is to remedy the aforementioned disadvantages in providing a circuit power supply which allows to establish, from the start, a optimal fuel pressure in the injectors when operation of these.
- a circuit of the aforementioned type is essentially characterized in that the threshold value is determined and modulated by the control means as a function of parameters engine operation such as temperature.
- the invention further relates to a motor for motor vehicle comprising a power supply circuit fuel as defined above and a starter whose features allow the engine to be driven at a sufficient speed to reach the value of fuel threshold pressure in a time interval reduced.
- the time interval is significantly less than or equal to one second
- the power circuit 1 shown in Figure 1 is intended to supply fuel to a combustion engine internal of a motor vehicle.
- This power circuit includes a high pressure injection pump 2 and a ramp 4 downstream of which are injectors 5.
- the pump 2 is supplied with fuel from a tank (not shown) by an inlet duct 3 in the direction of arrow F.
- Ramp 4 is supplied with high fuel pressure by an outlet pipe 6 connecting the pump 2 to the rail 4.
- the injectors 5 spray the fuel at the inside of engine cylinders (not shown) under the jet shape 8.
- injectors 5 are controlled by control means 7. These control means also control the high pressure pump operation 2.
- the high pressure injection pump 2 is by example a pump whose speed of rotation is linked to that of the engine with which it is associated.
- a starter known per se (not shown) drives the engine: the rotation speed of the pump is proportional to the speed of rotation of the engine.
- the fuel pressure delivered by the pump is then insufficient for proper functioning of the injectors 5.
- FIG. 2 shows that, during the engine starting phase, an operator actuates the starter at an instant t 1 , which drives the engine at a speed R d .
- the control means 7 keep the injectors 5 closed so that the injection of fuel into these injectors is prohibited.
- the fuel pressure delivered by this pump then increases continuously from time t 1 to time t 2 . This increase is relatively slow due to the phenomena of elasticity of the circuit and compressibility of the fuel.
- the pressure reaches a threshold value P s . This threshold value is considered sufficient to obtain good spraying of the fuel by the injectors 5.
- the control means 7 then authorize the opening of the injectors 5 at this instant t 2 .
- the injectors 5 are kept closed for a fraction of the start-up phase corresponding to the start of this phase.
- the good quality of the spray jet obtained by the present invention allows proper engine operation from the start, which reduces pollutant emissions.
- control means 7 comprise means for measuring, such as a sensor, the fuel pressure delivered into the rail 4 as well as means for comparison making it possible to compare the measured value with the threshold value stored in the control means 7.
- the measurement means reconstitute the pressure value from an operating model stored in the control means, this model incorporating engine operating parameters.
- the measuring means can be associated with the sensor.
- the threshold value at time t 2 is determined and modulated by the control means 7 as a function of other engine parameters such as, for example, the engine temperature.
- the engine has a positive ignition, it may also be advantageous not to order ignition as long as the injectors 5 are kept closed by the control means 7.
- the threshold pressure is generally reached in three or four engine revolutions.
- the starter used has mechanical characteristics making it possible to obtain the instant t 2 after a very short period, typically of the order of one second. .
- threshold pressure can still be determined either directly at the exit of high pressure pump, either at the injectors.
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)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- les moyens de commande comprennent des moyens de mesure de la pression de carburant dans la rampe et des moyens de comparaison de la valeur mesurée à la valeur de seuil ;
- lors du démarrage du moteur, le nombre de tours de la pompe à haute pression est proportionnel au nombre de tours du moteur ;
- la pompe à haute pression est une pompe à injection directe ; et
- la pompe à injection directe à haute pression possède des caractéristiques correspondant au régime de fonctionnement nominal du moteur.
- la figure 1 est une vue schématique du circuit d'alimentation selon la présente invention ; et
- la figure 2 représente des diagrammes illustrant le fonctionnement du circuit d'alimentation de la figure 1.
Claims (7)
- Circuit d'alimentation en carburant d'un moteur à combustion interne comprenant une pompe à haute pression (2), une rampe (4) d'injecteurs (5) qui est alimentée en carburant par ladite pompe à haute pression (2) et de moyens de commande (7) du fonctionnement des injecteurs (5), les moyens de commande (7) maintenant fermés les injecteurs (5) pendant une fraction de la phase de démarrage du moteur et autorisant l'ouverture des injecteurs (5) lorsque la pression dans la rampe (4) d'injecteurs (5) a atteint une valeur de seuil (Ps) prédéterminée, les moyens de commande (7) comprenant des moyens de mesure qui reconstituent la valeur de la pression à partir d'un modèle de fonctionnement incorporant des paramètres de fonctionnement du moteur, caractérisé en ce que la valeur de seuil est déterminée et modulée par les moyens de commande (7) en fonction de paramètres de fonctionnement du moteur tels que la température.
- Circuit d'alimentation en carburant selon la revendications 1, caractérisé en ce que les moyens de commande (7) comprennent des moyens de mesure de la pression de carburant dans la rampe (4) et des moyens de comparaison de la valeur mesurée à la valeur de seuil (Ps).
- Circuit d'alimentation en carburant selon la revendication 1 ou 2, caractérisé en ce que, lors du démarrage du moteur, le nombre de tours de la pompe à haute pression (2) est proportionnel au nombre de tours du moteur.
- Circuit d'alimentation en carburant selon la revendication 3, caractérisé en ce que la pompe à haute pression (2) est une pompe à injection directe.
- Circuit d'alimentation en carburant selon la revendication 4, caractérisé en ce que la pompe à injection directe à haute pression (2) possède des caractéristiques correspondant au régime de fonctionnement nominal du moteur.
- Moteur de véhicule automobile comprenant un circuit d'alimentation en carburant selon l'une quelconque des revendications 1 à 5 et un démarreur dont les caractéristiques permettent d'entraíner le moteur à une vitesse suffisante pour permettre d'atteindre la valeur de la pression de seuil de carburant dans un intervalle de temps réduit.
- Moteur de véhicule automobile selon la revendication 6, caractérisé en ce que l'intervalle de temps est sensiblement inférieur ou égal à une seconde.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9816446 | 1998-12-24 | ||
FR9816446A FR2787832B1 (fr) | 1998-12-24 | 1998-12-24 | Circuit d'alimentation en carburant d'un moteur a combustion interne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1013914A1 true EP1013914A1 (fr) | 2000-06-28 |
EP1013914B1 EP1013914B1 (fr) | 2003-07-09 |
Family
ID=9534510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990403253 Expired - Lifetime EP1013914B1 (fr) | 1998-12-24 | 1999-12-22 | Circuit d'alimentation en carburant d'un moteur à combustion interne |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1013914B1 (fr) |
DE (1) | DE69909418T2 (fr) |
ES (1) | ES2203035T3 (fr) |
FR (1) | FR2787832B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1321654A3 (fr) * | 2001-12-18 | 2004-04-07 | Toyota Jidosha Kabushiki Kaisha | Système d'alimentation en carburant à haute pression pour moteur à combustion interne et méthode de commande associée |
EP2133540A1 (fr) * | 2007-03-05 | 2009-12-16 | Yanmar Co., Ltd. | Dispositif de commande d'injection de carburant pour moteur diesel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2991389A1 (fr) * | 2012-06-05 | 2013-12-06 | Peugeot Citroen Automobiles Sa | Procede de commande d'un moteur a combustion interne |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3304605A1 (de) * | 1982-02-12 | 1983-08-25 | Steyr Daimler Puch Ag | Kraftstoff-einspritzanlage fuer eine elektrische, ein startschloss umfassende anlasseinrichtung aufweisende kraftfahrzeug-dieselmotoren |
US4487188A (en) * | 1981-11-25 | 1984-12-11 | Nissan Motor Company, Limited | Fuel system for internal combustion engine |
JPS61207833A (ja) * | 1985-03-12 | 1986-09-16 | Yanmar Diesel Engine Co Ltd | 内燃機関の起動制御装置 |
JPH05302537A (ja) * | 1992-04-24 | 1993-11-16 | Nippondenso Co Ltd | コモンレール式燃料噴射装置 |
EP0779424A2 (fr) * | 1995-12-15 | 1997-06-18 | NGK Spark Plug Co. Ltd. | Méthode pour commander le démarrage d'un moteur à combustion et dispositif pour la mise en oeuvre de ce procédé |
JPH09222037A (ja) * | 1996-02-19 | 1997-08-26 | Nissan Motor Co Ltd | 筒内直接噴射式内燃機関の制御装置 |
-
1998
- 1998-12-24 FR FR9816446A patent/FR2787832B1/fr not_active Expired - Lifetime
-
1999
- 1999-12-22 EP EP19990403253 patent/EP1013914B1/fr not_active Expired - Lifetime
- 1999-12-22 DE DE1999609418 patent/DE69909418T2/de not_active Expired - Lifetime
- 1999-12-22 ES ES99403253T patent/ES2203035T3/es not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4487188A (en) * | 1981-11-25 | 1984-12-11 | Nissan Motor Company, Limited | Fuel system for internal combustion engine |
DE3304605A1 (de) * | 1982-02-12 | 1983-08-25 | Steyr Daimler Puch Ag | Kraftstoff-einspritzanlage fuer eine elektrische, ein startschloss umfassende anlasseinrichtung aufweisende kraftfahrzeug-dieselmotoren |
JPS61207833A (ja) * | 1985-03-12 | 1986-09-16 | Yanmar Diesel Engine Co Ltd | 内燃機関の起動制御装置 |
JPH05302537A (ja) * | 1992-04-24 | 1993-11-16 | Nippondenso Co Ltd | コモンレール式燃料噴射装置 |
EP0779424A2 (fr) * | 1995-12-15 | 1997-06-18 | NGK Spark Plug Co. Ltd. | Méthode pour commander le démarrage d'un moteur à combustion et dispositif pour la mise en oeuvre de ce procédé |
JPH09222037A (ja) * | 1996-02-19 | 1997-08-26 | Nissan Motor Co Ltd | 筒内直接噴射式内燃機関の制御装置 |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 044 (M - 560) 10 February 1987 (1987-02-10) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 104 (M - 1563) 21 February 1994 (1994-02-21) * |
PATENT ABSTRACTS OF JAPAN vol. 097, no. 012 25 December 1997 (1997-12-25) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1321654A3 (fr) * | 2001-12-18 | 2004-04-07 | Toyota Jidosha Kabushiki Kaisha | Système d'alimentation en carburant à haute pression pour moteur à combustion interne et méthode de commande associée |
US6761151B2 (en) | 2001-12-18 | 2004-07-13 | Toyota Jidosha Kabushiki Kaisha | High-pressure fuel supply system of an internal combustion engine and control method thereof |
EP2133540A1 (fr) * | 2007-03-05 | 2009-12-16 | Yanmar Co., Ltd. | Dispositif de commande d'injection de carburant pour moteur diesel |
EP2133540A4 (fr) * | 2007-03-05 | 2013-08-07 | Yanmar Co Ltd | Dispositif de commande d'injection de carburant pour moteur diesel |
Also Published As
Publication number | Publication date |
---|---|
EP1013914B1 (fr) | 2003-07-09 |
FR2787832A1 (fr) | 2000-06-30 |
DE69909418D1 (de) | 2003-08-14 |
FR2787832B1 (fr) | 2001-02-23 |
ES2203035T3 (es) | 2004-04-01 |
DE69909418T2 (de) | 2004-04-22 |
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