WO2000057037A1 - Method for measuring atmospheric pressure in an internal combustion engine with camless valves - Google Patents
Method for measuring atmospheric pressure in an internal combustion engine with camless valves Download PDFInfo
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- WO2000057037A1 WO2000057037A1 PCT/FR2000/000407 FR0000407W WO0057037A1 WO 2000057037 A1 WO2000057037 A1 WO 2000057037A1 FR 0000407 W FR0000407 W FR 0000407W WO 0057037 A1 WO0057037 A1 WO 0057037A1
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- Prior art keywords
- pressure
- controlling
- pint
- atmospheric pressure
- measuring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/40—Methods of operation thereof; Control of valve actuation, e.g. duration or lift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
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- 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
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a combustion engine, in particular a thermal engine of a motor vehicle.
- the invention relates more particularly to a method of measuring atmospheric pressure in a supply circuit of a combustion engine of a motor vehicle of the type comprising a pressure sensor arranged in an air distribution device or a n air / fuel mixture which is arranged upstream of at least one cylinder of the engine to which the distribution device is connected by at least one intake valve.
- the invention relates more particularly to a combustion engine whose intake and exhaust valves of each cylinder are each controlled individually by means of a linear actuator, in particular an electromagnetic actuator, each actuator of a valve being connected to an electronic engine control unit which in particular receives a signal representative of the pressure measured by the atmospheric pressure sensor.
- Such a combustion engine without camshafts also called a “camless” engine, offers great possibilities for the individualized control of the intake and exhaust valves independently of the general distribution diagram (s) of the engine.
- the invention aims to propose a method of measuring atmospheric pressure which, by virtue of these individual control capabilities of the valves, in particular of the intake valves, makes it possible to have permanently the most precise measurement possible. of atmospheric pressure.
- the invention provides a method of the type mentioned above, characterized in that it consists in controlling the closing of all the intake valves before carrying out a pressure measurement using the sensor.
- the method consists in controlling the simultaneous closing of all the intake valves before carrying out a pressure measurement using the sensor;
- the method consists in controlling the said means, prior to the measurement of the pressure, so as to establish in the distribution device a pressure substantially equal to atmospheric pressure;
- the means for varying the flow rate comprise a flow control butterfly, and in that this butterfly is controlled in the fully open position before measuring the pressure;
- the means for varying the flow rate include a supercharging device, in particular a turbocharger, and in that the supercharging device is inhibited before measuring the pressure;
- the method consists in controlling the closing of the valve before measuring the pressure; - The method consists in controlling the closing of all the intake valves during a deceleration phase of the engine.
- the single figure shows a cylinder re 1 0 of a four-stroke internal combustion engine and the upper part of which forms a combustion chamber 12 delimited by a movable piston 14 and by a cylinder head 15.
- the cylinder 10 is supplied in air / fuel mixture by an intake circuit 16 which opens into the combustion chamber 12 through an intake valve 1 8 whose movements are controlled by a linear electromagnetic actuator 1 1 in order to shut off or not the communication between the intake circuit 16 and the combustion chamber 12.
- An exhaust circuit 17 is provided for the evacuation of the burnt gases out of the combustion chamber 12 through an exhaust valve 19 also controlled by an electromagnetic linear actuator 13.
- the control of the intake valves 1 8 and exhaust 1 9 is provided by an electronic control unit 22 which controls the actuators 1 1 and 13, and which also controls the injection of fuel, here indirect, by means of an injector 20, as well as 'ignition by means of a candle (not shown).
- the electronic control unit 22 comprises in particular means for storing one or more engine operating maps, each of which determines the different parameters and states of the engine for a range of operating points, with a view in particular to determining the speed of engine rotation, load of each cylinder, etc.
- the electronic control unit receives signals representative of operating parameters such as engine speed, atmospheric pressure, pressure in each cylinder, flow of intake and / or exhaust gases, instantaneous torque supplied, etc.
- the atmospheric pressure Patm is an essential datum for the calculation of the mass of air admitted into the engine cylinders and therefore therefore for the quantity of fuel to be injected into the cylinders.
- the intake circuit 16 may include a device 24 for distributing the air flow towards all the intake conduits 26 each of which is associated with an intake valve 1 8, and upstream of which is for example, a butterfly valve 28 for adjusting the air flow rate in the distributor device 24.
- the pressure Pint is measured inside the distribution device 24 by means of a pressure sensor 30 which is connected to the electronic control unit 22. I l It is clearly understood that it is desirable to carry out each measurement of the pressure Pint under conditions under which it is close to or almost equal to atmospheric pressure Patm.
- Each pressure measurement Pint is thus carried out after the closing of the last intake valve, all the intake valves 1 8 preferably being closed simultaneously before each pressure measurement.
- each measurement of the pressure Pint requiring the closing of the intake valves is carried out for an engine operating point allowing the momentary maintenance of all the valves intake in the closed position, such an operating point being for example a deceleration phase or a gear change phase in the case of an engine belonging to a powertrain comprising a mechanical gearbox (not shown).
- the supply circuit includes a throttle valve 28 upstream of the distributor device, it is preferable to control the throttle valve 28, by means of the electronic control unit 22, in the fully open position if it is in the full or partial closed position when you want to perform the pressure measurement.
- this inhibition can be obtained by controlling the discharge valve, also called "waste-gate" of the turbocharger.
- the method according to the invention provides for order the closing of the gas recirculation valve before the Pint pressure measurement operation.
- the closing of all the intake valves in order to 'an atmospheric pressure measurement operation is preferably performed during a motor deceleration phase.
- the principles implemented within the framework of the method according to the invention which have been explained by considering a single cylinder comprising i read even one only the intake valve and only one exhaust valve applies well heard on an engine with several cylinders, each of which comprises, where appropriate, several intake valves, and several exhaust valves, each of which is controlled individually by an individual linear actuator 1 1.
- the engine comprises several distributing devices, each of which is associated with a cylinder or with a group of cylinders, it is possible to implement the method according to the invention for one of the distributing devices by closing all the intake valves of the cylinders supplied by this distributor device.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
"Procédé de mesure de la pression atmosphérique dans un moteur à combustion à soupapes sans arbres à cames""Method for measuring atmospheric pressure in a valve combustion engine without camshafts"
La présente invention concerne un moteur à combustion , notamment un- moteur thermiq ue de véhicule automobile.The present invention relates to a combustion engine, in particular a thermal engine of a motor vehicle.
L'invention concerne plus particulièrement un procédé de mesure de la pression atmosphérique dans un circuit d'alimentation d'un moteur à combustion de véhicule automobile d u type comportant un capteur de pression agencé dans u n dispositif de répartition d'air ou d'u n mélange air/carburant qui est agencé en amont d'au moins un cylindre d u moteur auquel le dispositif de répartition est relié par au moins une soupape d'admission .The invention relates more particularly to a method of measuring atmospheric pressure in a supply circuit of a combustion engine of a motor vehicle of the type comprising a pressure sensor arranged in an air distribution device or a n air / fuel mixture which is arranged upstream of at least one cylinder of the engine to which the distribution device is connected by at least one intake valve.
L'invention concerne plus particulièrement un moteur à combustion dont les soupapes d'admission et d 'échappement de chaq ue cylindre son chacune commandée ind ivid uellement au moyen d'un actionneur linéaire, notamment d'un actionneur électromagnétique, chaque actionneur d'une soupape étant relié à une unité électroniq ue de commande du moteur qui reçoit notamment un signal représentatif de la pression mesurée par le capteur de pression atmosphérique.The invention relates more particularly to a combustion engine whose intake and exhaust valves of each cylinder are each controlled individually by means of a linear actuator, in particular an electromagnetic actuator, each actuator of a valve being connected to an electronic engine control unit which in particular receives a signal representative of the pressure measured by the atmospheric pressure sensor.
U n tel moteur à combustion sans arbres à cames, aussi appelé moteur "camless" , offre de g randes possibilités pour la commande individualisée des soupapes d'admission et d'échappement indépendamment du ou des d iagrammes généraux de distribution du moteur.Such a combustion engine without camshafts, also called a "camless" engine, offers great possibilities for the individualized control of the intake and exhaust valves independently of the general distribution diagram (s) of the engine.
L'invention vise à proposer un procédé de mesure de la pression atmosphériq ue qui , grâce à ces facultés de commande ind ividuelle des soupapes, notamment des soupapes d'ad mission , permet de disposer en permanence d'une mesu re la plus précise possible de la pression atmosphérique. Dans ce but, l'invention propose un procédé du type mentionné précédemment, caractérisé en ce q u'il consiste à commander la fermeture de toutes les soupapes d'admission avant d'effectuer une mesure de la pression à l'aide d u capteur.The invention aims to propose a method of measuring atmospheric pressure which, by virtue of these individual control capabilities of the valves, in particular of the intake valves, makes it possible to have permanently the most precise measurement possible. of atmospheric pressure. To this end, the invention provides a method of the type mentioned above, characterized in that it consists in controlling the closing of all the intake valves before carrying out a pressure measurement using the sensor.
Grâce à une telle conception , il est possible d'effectuer une mesure de la pression atmosphérique dans des conditions instantanées permettant de s'affranch ir q uasiment de toute perturbation due au flux gazeux dans le dispositif répartiteur. Selon d'autres caractéristiques de l'invention :Thanks to such a design, it is possible to carry out a measurement of atmospheric pressure under instantaneous conditions making it possible to get rid of almost any disturbance due to the gas flow in the distributor device. According to other characteristics of the invention:
- la mesure de la pression est effectuée de manière temporisée après fermeture de la dernière soupape d'admission ;- the pressure measurement is carried out in a timed manner after closing the last intake valve;
- le procédé consiste à commander la fermeture simultanée de toutes les soupapes d'admission avant d'effectuer une mesure de la pression à l'aide d u capteur ;the method consists in controlling the simultaneous closing of all the intake valves before carrying out a pressure measurement using the sensor;
- pour la mesure de la pression atmosphérique dans un circuit d'alimentation d'un moteur à combustion de véhicule automobile d u type comportant, en amont d u d ispositif de répartition , des moyens susceptibles de faire varier le débit et/ou la pression à l'intérieur du dispositif de répartition , le procédé consiste à commander lesd its moyens, préalablement à la mesure de la pression , de manière à établir dans le dispositif de répartition une pression sensiblement égale à la pression atmosphérique ;- For the measurement of atmospheric pressure in a supply circuit of a combustion engine of a motor vehicle of the type comprising, upstream of the distribution device, means capable of varying the flow rate and / or the pressure at inside the distribution device, the method consists in controlling the said means, prior to the measurement of the pressure, so as to establish in the distribution device a pressure substantially equal to atmospheric pressure;
- les moyens pour faire varier le débit comportent un papillon de commande d u débit, et en ce que ce papillon est commandé en position de pleine ouverture préalablement à la mesure de la pression ; - les moyens pour faire varier le débit comportent un dispositif de suralimentation , notamment un turbocompresseur, et en ce que le dispositif de suralimentation est inhibé préalablement à la mesure de la pression ;- The means for varying the flow rate comprise a flow control butterfly, and in that this butterfly is controlled in the fully open position before measuring the pressure; the means for varying the flow rate include a supercharging device, in particular a turbocharger, and in that the supercharging device is inhibited before measuring the pressure;
- pour la mesure de la pression atmosphérique dans un circuit d'alimentation d'un moteur à combustion de véhicule automobile d u type comportant une branche de recirculation des gaz d'échappement qui est reliée au dispositif de répartition à travers une valve de commande du débit des gaz recirculés, le procédé consiste à commander la fermeture de la valve préalablement à la mesure de la pression ; - le procédé consiste à commander la fermeture de toutes les soupapes d'admission lors d'une phase décélération d u moteur.- for the measurement of atmospheric pressure in a supply circuit of a combustion engine of a motor vehicle of the type comprising an exhaust gas recirculation branch which is connected to the distribution device through a flow control valve recirculated gases, the method consists in controlling the closing of the valve before measuring the pressure; - The method consists in controlling the closing of all the intake valves during a deceleration phase of the engine.
D'autres caractéristiq ues et avantages de l'invention apparaîtront à la lecture de la description détaillée q ui suit pour la compréhension de laquelle on se reportera au dessin annexé dont la figure unique est une vue schématiq ue partielle en coupe d'une partie d'un moteur à combustion interne à soupapes sans arbres à cames dans lequel la pression atmosphérique est mesurée selon un procédé conforme aux enseig nements de l'invention .Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawing, the single figure of which is a partial schematic view in section of part an internal combustion engine with valves without camshafts in which the atmospheric pressure is measured according to a process in accordance with the teachings of the invention.
On a représenté à la figure unique un cylind re 1 0 d'un moteur à combustion interne à quatre temps et dont la partie supérieure forme une chambre de combustion 12 délimitée par un piston mobile 14 et par une culasse 15. Le cylindre 10 est alimenté en mélange air/carburant par un circuit d'admission 16 qui débouche dans la chambre de combustion 12 au travers d'une soupape d'admission 1 8 dont les déplacements sont commandés par un actionneur électromagnétique linéaire 1 1 afin d'obturer ou non la communication entre le circuit d'admission 16 et la chambre de combustion 12. Un circuit d'échappement 17 est prévu pour l'évacuation des gaz brûlés hors de la chambre de combustion 12 au travers d'une soupape d'échappement 19 également commandée par un actionneur linéaire électromagnétique 13. La commande des soupapes d'admission 1 8 et d'échappement 1 9 est assurée par une unité électronique de commande 22 qui pilote les actionneurs 1 1 et 13 , et qui commande aussi l'injection de carburant, ici indirecte, au moyen d'un injecteur 20, de même q ue l'allumage au moyen d'une bougie (non représentée) .The single figure shows a cylinder re 1 0 of a four-stroke internal combustion engine and the upper part of which forms a combustion chamber 12 delimited by a movable piston 14 and by a cylinder head 15. The cylinder 10 is supplied in air / fuel mixture by an intake circuit 16 which opens into the combustion chamber 12 through an intake valve 1 8 whose movements are controlled by a linear electromagnetic actuator 1 1 in order to shut off or not the communication between the intake circuit 16 and the combustion chamber 12. An exhaust circuit 17 is provided for the evacuation of the burnt gases out of the combustion chamber 12 through an exhaust valve 19 also controlled by an electromagnetic linear actuator 13. The control of the intake valves 1 8 and exhaust 1 9 is provided by an electronic control unit 22 which controls the actuators 1 1 and 13, and which also controls the injection of fuel, here indirect, by means of an injector 20, as well as 'ignition by means of a candle (not shown).
L'unité électronique de commande 22 comporte notamment des moyens de mémorisation d'une ou plusieurs cartog raphies de fonctionnement d u moteur dont chacune détermine les différents paramètres et états d u moteur pour une gamme de points de fonctionnement, en vue notamment de déterminer le régime de rotation du moteur, la charge de chaque cylindre, etc.The electronic control unit 22 comprises in particular means for storing one or more engine operating maps, each of which determines the different parameters and states of the engine for a range of operating points, with a view in particular to determining the speed of engine rotation, load of each cylinder, etc.
L'unité électronique de commande reçoit des signaux représentatifs de paramètres de fonctionnement tels que le régime du moteur, la pression atmosphérique, la pression dans chaque cylindre, le débit des gaz d'admission et/ou d'échappement, le couple instantané fourni, etc.The electronic control unit receives signals representative of operating parameters such as engine speed, atmospheric pressure, pressure in each cylinder, flow of intake and / or exhaust gases, instantaneous torque supplied, etc.
La pression atmosphérique Patm est une donnée essentielle pour le calcul de la masse d'air admise dans les cylindres du moteur et donc par conséquent pour la quantité de carburant à injecter dans les cylindres.The atmospheric pressure Patm is an essential datum for the calculation of the mass of air admitted into the engine cylinders and therefore therefore for the quantity of fuel to be injected into the cylinders.
Selon un agencement connu dans le cad re d'un moteur à soupapes et à arbres à cames, le circuit admission 16 peut comporter un d ispositif 24 de répartition du flux d'air en direction de tous les cond uits 26 d'admission dont chacun est associé à une soupape d'admission 1 8, et en amont d uquel est par exemple disposé un papillon 28 de réglage du débit d'air dans le dispositif répartiteur 24.According to an arrangement known in the framework of a valve and camshaft engine, the intake circuit 16 may include a device 24 for distributing the air flow towards all the intake conduits 26 each of which is associated with an intake valve 1 8, and upstream of which is for example, a butterfly valve 28 for adjusting the air flow rate in the distributor device 24.
Selon un agencement connu , afin de mesurer la pression atmosphérique Patm , on mesure la pression Pint à l'intérieur du dispositif de répartition 24 au moyen d'un capteur de pression 30 qui est relié à l'unité électronique de commande 22. I l est bien entend u souhaitable d'effectuer chaq ue mesure de la pression Pint dans des conditions dans lesq uelles elle est proche ou quasiment égale à la pression atmosphérique Patm.According to a known arrangement, in order to measure the atmospheric pressure Patm, the pressure Pint is measured inside the distribution device 24 by means of a pressure sensor 30 which is connected to the electronic control unit 22. I l It is clearly understood that it is desirable to carry out each measurement of the pressure Pint under conditions under which it is close to or almost equal to atmospheric pressure Patm.
Conformément au procédé selon l'invention , dans le cas d'un moteur "camless", il est possible d'éviter les erreurs d ues aux pertes de charge et au débit d'air dans le répartiteur d'air 24 en vue d'obtenir une mesure fiable et fréquente de la pression atmosphérique en procédant, préalablement à chaque mesure de pression dans le capteur 30, à la fermeture de toutes les soupapes d'admission 1 8 au moyen de l'unité électronique de commande 22.According to the method according to the invention, in the case of a "camless" motor, it is possible to avoid errors due to the pressure drops and the air flow in the air distributor 24 in order to obtain a reliable and frequent measurement of atmospheric pressure by proceeding, prior to each pressure measurement in the sensor 30, to the closure of all the intake valves 1 8 by means of the electronic control unit 22.
Chaque mesure de la pression Pint est ainsi effectuée après la fermeture de la dernière soupape d'ad mission , toutes les soupapes d'admission 1 8 étant de préférence fermées simultanément avant chaq ue mesure de pression .Each pressure measurement Pint is thus carried out after the closing of the last intake valve, all the intake valves 1 8 preferably being closed simultaneously before each pressure measurement.
En fermant toutes les soupapes d'admission de tous les cylindres, on peut mesurer, de préférence après un laps de temps donné, c'est-à-dire après une temporisation calibrée, la pression Pint q u i est alors exactement égale à la pressionBy closing all the intake valves of all the cylinders, it is possible to measure, preferably after a given period of time, that is to say after a calibrated delay, the pressure Pint q u i is then exactly equal to the pressure
Patm.Patm.
Bien entend u , afin de ne pas perturber le fonctionnement normal d u moteur, chaq ue mesure de la pression Pint nécessitant la fermeture des soupapes d'admission est effectuée pour un point de fonctionnement d u moteur permettant le maintien momentané de toutes les soupapes d'admission en position fermée, un tel point de fonctionnement étant par exemple une phase de décélération ou une phase de changement de rapport dans le cas d'un moteur appartenant à un groupe motopropulseur comportant une boîte de vitesses mécan ique (non représentée).Of course u, in order not to disturb the normal operation of the engine, each measurement of the pressure Pint requiring the closing of the intake valves is carried out for an engine operating point allowing the momentary maintenance of all the valves intake in the closed position, such an operating point being for example a deceleration phase or a gear change phase in the case of an engine belonging to a powertrain comprising a mechanical gearbox (not shown).
Lorsq ue, comme dans le cas représenté à la figure unique, le circuit d'alimentation comporte un papillon 28 en amont d u dispositif répartiteur, il est préférable de commander le papillon 28 , par l'intermédiaire de l'unité électronique de commande 22 , en position de pleine ouverture si celui-ci est en position de fermeture totale ou partielle au moment où l'on souhaite effectuer la mesure de pression .When, as in the case shown in the single figure, the supply circuit includes a throttle valve 28 upstream of the distributor device, it is preferable to control the throttle valve 28, by means of the electronic control unit 22, in the fully open position if it is in the full or partial closed position when you want to perform the pressure measurement.
En effet, en ouvrant le papillon 28, on obtient le plus rapidement possible l'éq uilibre entre la pression Pint à l'intérieur d u d ispositif de répartition 24 et la pression atmosphériq ue Patm .Indeed, by opening the butterfly 28, one obtains as quickly as possible the equilibrium between the pressure Pint inside a distribution device 24 and the atmospheric pressure Patm.
Dans le cas , non représenté, d'un moteur muni d'un dispositif de suralimentation , tel qu'un turbocompresseur, il est bien entend u nécessaire d'effectuer l'opération de mesure de la pression Pint en ayant préalablement inhibé le dispositif de suralimentation de façon à obtenir le plus rapidement possible l'éq uilibre entre la pression Pint à l'intérieur d u dispositif de répartition 24 et la pression atmosphérique Patm.In the case, not shown, of an engine fitted with a supercharging device, such as a turbocharger, it is clearly understood that it is necessary to carry out the operation of measuring the pressure Pint having previously inhibited the supercharging so as to obtain as quickly as possible the equilibrium between the pressure Pint inside the distribution device 24 and the atmospheric pressure Patm.
Dans le cas d'un turbocompresseur, cette inhibition peut être obten ue en commandant la valve de décharge, aussi appelée "waste-gate" d u turbocompresseur.In the case of a turbocharger, this inhibition can be obtained by controlling the discharge valve, also called "waste-gate" of the turbocharger.
Dans le cas, non représenté, où le moteur comporte un circuit d'alimentation avec au moins une branche de recirculation des gaz d'échappement qui est reliée au dispositif de répartition 24 à travers une valve de commande du débit des gaz recirculés, le procédé selon l'invention prévoit de commander la fermeture de la valve de recirculation des gaz préalablement à l'opération de mesure de la pression Pint.In the case, not shown, where the engine comprises a supply circuit with at least one exhaust gas recirculation branch which is connected to the distribution device 24 through a valve for controlling the flow of the recirculated gases, the method according to the invention provides for order the closing of the gas recirculation valve before the Pint pressure measurement operation.
Afin de protéger la ligne d'échappement du moteur et plus particulièrement le pot catalytique si celle-ci en comporte un , en évitant un phénomène de refroidissement excessif et une saturation notamment en oxygène, la fermeture de toutes les soupapes d'admission en vue d'une opération de mesure de la pression atmosphériq ue est effectuée de préférence lors d'une phase de décélération du moteur. Les principes mis en oeuvre dans le cadre d u procédé selon l'invention q ui ont été expliq ués en considérant u n seu l cylindre comportant lu i-même une seu le soupape d'admission et une seule soupape d'échappement s'appliq ue bien entendu à un moteur à plusieurs cylindres dont chacun comporte, le cas échéant, plusieurs soupapes d'admission , et plusieurs soupapes d'échappement, dont chacune est commandée individ uellement par un actionneur linéaire ind ivid uel 1 1 .In order to protect the engine exhaust line and more particularly the catalytic converter if it has one, avoiding excessive cooling and saturation, in particular of oxygen saturation, the closing of all the intake valves in order to 'an atmospheric pressure measurement operation is preferably performed during a motor deceleration phase. The principles implemented within the framework of the method according to the invention which have been explained by considering a single cylinder comprising i read even one only the intake valve and only one exhaust valve applies well heard on an engine with several cylinders, each of which comprises, where appropriate, several intake valves, and several exhaust valves, each of which is controlled individually by an individual linear actuator 1 1.
Si le moteur comporte plusieurs dispositifs répartiteurs dont chacun est associé à un cylindre ou à un g roupe de cylindres , il est possible de mettre en oeuvre le procédé selon l'invention pour l'un des dispositifs répartiteurs en procédant à la fermeture de toutes les soupapes d'admission des cylindres alimentés par ce dispositif répartiteur. If the engine comprises several distributing devices, each of which is associated with a cylinder or with a group of cylinders, it is possible to implement the method according to the invention for one of the distributing devices by closing all the intake valves of the cylinders supplied by this distributor device.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00907701A EP1175552A1 (en) | 1999-03-23 | 2000-03-10 | Method for measuring atmospheric pressure in an internal combustion engine with camless valves |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR99/03564 | 1999-03-23 | ||
| FR9903564A FR2791393A1 (en) | 1999-03-23 | 1999-03-23 | METHOD FOR MEASURING THE ATMOSPHERIC PRESSURE IN A COMBUSTION ENGINE WITH VALVES WITHOUT CAMSHAFTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000057037A1 true WO2000057037A1 (en) | 2000-09-28 |
Family
ID=9543502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2000/000407 Ceased WO2000057037A1 (en) | 1999-03-23 | 2000-03-10 | Method for measuring atmospheric pressure in an internal combustion engine with camless valves |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1175552A1 (en) |
| FR (1) | FR2791393A1 (en) |
| WO (1) | WO2000057037A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW559640B (en) * | 2001-10-31 | 2003-11-01 | Yamaha Motor Co Ltd | Device and method for detection of atmospheric pressure of engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600993A (en) * | 1983-05-27 | 1986-07-15 | Allied Corporation | Measuring barometric pressure with a manifold pressure sensor in a microprocessor based engine control system |
| JPS6312848A (en) * | 1986-07-02 | 1988-01-20 | Yamaha Motor Co Ltd | Pressure detecting device for internal combustion engine |
| US4951647A (en) * | 1988-05-06 | 1990-08-28 | Mikuni Corporation | Engine control apparatus |
| JPH07247816A (en) * | 1994-03-04 | 1995-09-26 | Toyota Motor Corp | Vehicle altitude detector |
| EP0844370A2 (en) * | 1994-12-16 | 1998-05-27 | Honda Giken Kogyo Kabushiki Kaisha | Electromagnetically driven valve control system for internal combustion engines |
-
1999
- 1999-03-23 FR FR9903564A patent/FR2791393A1/en active Pending
-
2000
- 2000-03-10 EP EP00907701A patent/EP1175552A1/en not_active Withdrawn
- 2000-03-10 WO PCT/FR2000/000407 patent/WO2000057037A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4600993A (en) * | 1983-05-27 | 1986-07-15 | Allied Corporation | Measuring barometric pressure with a manifold pressure sensor in a microprocessor based engine control system |
| JPS6312848A (en) * | 1986-07-02 | 1988-01-20 | Yamaha Motor Co Ltd | Pressure detecting device for internal combustion engine |
| US4951647A (en) * | 1988-05-06 | 1990-08-28 | Mikuni Corporation | Engine control apparatus |
| JPH07247816A (en) * | 1994-03-04 | 1995-09-26 | Toyota Motor Corp | Vehicle altitude detector |
| EP0844370A2 (en) * | 1994-12-16 | 1998-05-27 | Honda Giken Kogyo Kabushiki Kaisha | Electromagnetically driven valve control system for internal combustion engines |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 012, no. 208 (M - 709) 15 June 1988 (1988-06-15) * |
| PATENT ABSTRACTS OF JAPAN vol. 1996, no. 01 31 January 1996 (1996-01-31) * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1175552A1 (en) | 2002-01-30 |
| FR2791393A1 (en) | 2000-09-29 |
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