EP0296969A1 - Device for the induction under pressure of a mixture in the cylinder of an internal combustion engine - Google Patents
Device for the induction under pressure of a mixture in the cylinder of an internal combustion engine Download PDFInfo
- Publication number
- EP0296969A1 EP0296969A1 EP88401569A EP88401569A EP0296969A1 EP 0296969 A1 EP0296969 A1 EP 0296969A1 EP 88401569 A EP88401569 A EP 88401569A EP 88401569 A EP88401569 A EP 88401569A EP 0296969 A1 EP0296969 A1 EP 0296969A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- pressure
- engine
- pipe
- valve
- 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
Images
Classifications
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
-
- 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
- F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
- F01L7/12—Rotary or oscillatory slide valve-gear or valve arrangements specially for two-stroke engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B33/04—Engines with reciprocating-piston pumps; Engines with crankcase pumps with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B33/28—Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups F02B33/02 - F02B33/26
- F02B33/30—Control of inlet or outlet ports
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/107—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive pneumatic drive, e.g. crankcase pressure drive
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/12—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary
- F02M59/14—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps having other positive-displacement pumping elements, e.g. rotary of elastic-wall type
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/10—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel peculiar to scavenged two-stroke engines, e.g. injecting into crankcase-pump chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Definitions
- the present invention relates to a method and devices for introducing pressurized fuel mixture at the end of air sweeping in a 2-stroke engine cylinder.
- the pressure source used is supplied by the pressure prevailing in the cylinder housing which is 120 ° behind the crankshaft (in the case of a 3, 6, ..., 3n cylinder engine) or by the cylinder housing which is delayed by 90 ° Crankshaft (in the case of a 4, 8, ..., 4n cylinder engine) with respect to the cylinder considered where the introduction of fuel mixture takes place.
- This pressure source is not stored.
- the introduction of fuel mixture under pressure occurs on the arrival of this pressure source in the cylinder considered during its end of sweeping phase.
- the arrival of this pressure source in a fuel metering device prepares a fuel mixture which can be introduced into the cylinder through an orifice which will preferably be opened only during the arrival of this pressure source. This hole can be in the cylinder head.
- the device may include a valve controlled to open during the arrival of this pressure source, or an automatic valve (type non-return valve), the opening of which is controlled by the pressure coming from the source of pressure. pressure.
- a valve controlled to open during the arrival of this pressure source or an automatic valve (type non-return valve), the opening of which is controlled by the pressure coming from the source of pressure. pressure.
- the hole can also be in the cylinder. Its opening can then be controlled by the movement of the piston (in the case of a light) combined with a non-return device of the valve type (or with a rotary plug).
- one embodiment of this type can be to connect the cylinder housing delayed by 120 or 90 ° Crankshaft to the cylinder considered, via a transfer duct arriving opposite the exhaust side in the cylinder considered (duct generally called duct rear transfer).
- this dosage can be done using low pressure injectors, but also using simpler devices, such as, for example, a carburetor of the type used for the intake of an engine two-stroke.
- the present invention relates to a device for introducing under pressure the fuel mixture into a first cylinder of an internal combustion engine, this engine comprising at least one other cylinder having a pump casing.
- the device according to the invention is characterized in that it comprises a connecting pipe between said pump casing and the first cylinder and in that there is a non-zero angular offset between the cycle of each of said cylinders.
- This angular offset can be 120 ° and the cycle of the first cylinder can precede the cycle of the other cylinder by 120 °.
- this angular offset may be 90 ° and the cycle of the first cylinder may precede the cycle of the other cylinder by 90 °.
- the device according to the invention applies in particular to engines comprising a number of cylinders multiple of 3 or 4.
- the pipeline may open into the first cylinder in the vicinity of the cylinder head of the engine.
- the pipeline may open into the first cylinder on the side wall of this cylinder substantially at the bottom of this cylinder.
- the device according to the invention may include a shutter member placed between the pipe and the first cylinder, substantially in the vicinity of the latter.
- the shutter member may be a valve controlled by a cam, or electromagnetically, or a rotating plug.
- the shutter member may be automatic and be adapted to act like a valve.
- the pipeline may include a fuel introduction and metering device.
- This fuel introduction device may be a low pressure injector, just as it may include a venturi nozzle associated with said low pressure injector.
- the fuel introduction device may be a carburetor.
- the control of this carburetor can be coupled with a control that controls the amount of gas introduced into the pump housing of the first cylinder.
- the device according to the invention may comprise between the carburetor and the pipe a non-return element such as a valve.
- the fuel introduction and metering member comprises a diaphragm pump actuated by the pressure pulses of a pump casing.
- the outlet duct of this diaphragm pump which connects the latter to the pipeline may include a system for adjusting its passage section.
- This system may include a needle and control means taking into account the average pressure of a casing.
- the present invention also relates to a method of introducing the fuel mixture under pressure into a first cylinder of an internal combustion engine, this engine comprising at least one other cylinder having a pump casing.
- This method is characterized in that the pressure of the gases contained in said pump housing is used as a pressure source for injecting the fuel mixture into the other cylinder.
- each of the cylinders may be connected to a pump casing of another cylinder angularly delayed.
- each cylinder may be in connection with the pump casing of the cylinder which is 120 ° behind the crankshaft.
- the connecting pipe does not serve as storage capacity and its volume can be relatively small.
- Figure 1 shows in solid lines with the reference P1, the pressure variation curve in the cylinder during the scanning of this cylinder or cylinder considered.
- This pressure source can therefore allow the introduction of fuel mixture during this whole part of the operating cycle of the cylinder considered where the pressure difference is sufficient.
- FIG. 2 shows the same case, this time with a pressure source coming from a crankcase 90 ° behind the crankshaft relative to the cylinder considered, this corresponds in particular to the case of an engine comprising four cylinders.
- the principle is the same, with however a source of pressure available with an offset of 90 ° Crankshaft arriving 30 ° Crankshaft earlier in the sweep.
- the two figures also show that during a whole other large part of the cycle, the pressure in the cylinder considered (which is moreover not represented over the entire cycle since its values would go out of the scale of the figures), is greater than the pressure of the pressure source, however, it is important that there is no exchange in the cylinder direction considered towards pressure source, so as not to disturb the operation of the pressure source and the associated fuel metering device.
- Figures 3, 4, 5, 6, 7 show in solid lines the cylinder considered 1 with its piston 2 at the end of scanning, its exhaust 3, its exhaust light 4 which is about to be closed, its lights lateral transfer 5, and rear transfer 6, its casing 7 with an air intake only, for example by valves 8, its spark plug 9, the rod-crank system 10.
- the cylinder 11 having a piston 12 whose movement is angularly delayed by 120 ° by means of the rod-crank system 13, relative to the piston 2 of the cylinder considered 1.
- the piston 12 is in the expansion phase in the cylinder 11 and at the same time of compression in the pump casing 14.
- the pump housing 14 whose movement of the piston 12 is angularly delayed by 120 ° supplies the pressure source through the conduit 15.
- this duct is connected to the combustion chamber 16 of the cylinder considered 1.
- the rear transfer 6 of the cylinder 1 can then optionally be connected to its own pump housing 7 by the duct 17.
- the introduction of the pressurized air from the pump housing 14 into the chamber 16 takes place through an orifice 18, the opening of which is controlled by a valve 19. Upstream of the valve is a device for introducing and low-pressure fuel metering 20.
- This device can be a low-pressure injector that is found commercially, or a fuel pump actuated by successive pressures and depressions of a pump housing. A diagram of this latter device will be specified in FIG. 8. The introduction of the liquid fuel can take place in the duct 15 both during the whole time when the valve 19 is closed and during the time when it is open.
- This fuel metering and introduction device 20 can be associated with a venturi nozzle 21 placed in the duct 15, just upstream from the valve 19 and the orifice 18, in accordance with patent EP-189,714, in order to improve the spraying of fuel with air from the pressure source (pump housing 14).
- a deflector 22 or device for orienting the jet of mixture introduced into the cylinder is also advantageously possible to place a deflector 22, or device for orienting the jet of mixture introduced into the cylinder.
- This device forming part of the cylinder head or attached to the cylinder head is of the type, for example, described in patent EP-189,715.
- valve 19 is controlled mechanically, for example by a cam 23 driven in rotation at the speed of the motor. This cam controls the movement of the valve 19 by means of a pusher 24. The valve 19 is returned by a spring 25.
- valve 19 is not controlled. It is simply fitted with a return spring 25. It is left free to move as a function of the upstream and downstream pressure differences. It then acts like a flap or automatic valve.
- the control of the valve can be done by an electromagnetic system which can be controlled electronically.
- the duct 15 coming from the source of compressed air 14 is connected to a transfer light, preferably to the rear transfer light 6, so called because it is substantially opposite to the light of exhaust.
- a non-return valve 26 prevents the gases from the cylinder 1 from penetrating into the casing 14 during the depression phase of the latter.
- This fuel metering and introduction device 27 can be a low-pressure injector that is commercially available, or a fuel pump actuated by the successive pressures and depressions of a pump housing (Fig. 8) , or a conventional carburetor activated by the air flow passing through it. In the latter case, a second external air intake circuit should be provided, for example through this carburetor and through the duct 15. A schematic representation is made of it in FIG. 10.
- the spraying of the fuel mixture may be advantageously improved by a nozzle-venturi type device 28 placed just upstream of the valve 26 in accordance with patent FR-2,575,521.
- valve 6 is replaced by a plug rotary 29 driven by the rotation of the motor and thus preferably controlling the opening of the light 6.
- Figure 7 shows the case of Figure 6 where the pressure source is provided by the movement in the pump housing 14 of a piston 12 angularly delayed by 90 ° Crankshaft relative to the movement of the piston 2 of the cylinder considered 1. It is obvious that the cases of FIGS. 3, 4, 5 could also be described in the same way with this delay of 90 ° V instead of 120 ° V.
- FIG. 8 shows a schematic representation of a fuel metering device which can be used in place of the devices 20 or 27.
- This device pumps the fuel from the tank 30 via the non-return valve 31 to the duct 34 through the non-return valve 33.
- the membrane 32 acts as a fuel pump. On the one hand it is in contact with the fuel it pumps. On the other side, its reciprocating movement which allows this pump role is actuated by the pressure pulses coming from a pump casing which can be either casing 7 or casing 14 and which is connected to this side of the membrane via conduit 35.
- the latter is under vacuum and therefore controls the diaphragm 32 so as to increase the volume 36 thereby sucking fuel through the valve 31 which opens. Then, during the compression phase of the casing, the movement of the diaphragm 32 reduces the volume 36 and therefore pumps the fuel into the duct 34 via the valve 33.
- This device therefore acts as a pump and fuel metering. It is slaved to the engine speed, since it provides one pump movement per revolution, and it is also slaved to the load since the amplitude of the pressure pulses in the crankcase is proportional to the load.
- the pipe 34 is then directly connected to the location in the pipe 15 where the fuel is introduced.
- the opening of the duct 34 is adjusted as a function of the load by a needle 37 which can be actuated either directly or indirectly by a lever 38 connected to another membrane 39.
- the other side of the membrane 39 is again in communication with the pressure of a motor crankcase via a conduit 40.
- the inertia of the assembly constituted by the needle 37, the lever 38 and the membrane 39 is chosen such that it does not allow movement of the membrane 39 according to the pulsations of instantaneous pressure of a casing. It must be studied in order to be controlled only by the average pressure of a crankcase, a pressure which is directly representative of the engine load. This results in a position of the metering needle directly representative of the engine load. At the point of the needle, the fuel thus dosed is guided by the pipe 41 to the place of introduction into the pipe 15.
- Figure 10 shows another particularly simple embodiment of the metering device.
- the carburetor is for example a carburetor of the conventional type for 2-stroke engine, with plug and needle correcting the nozzle nozzle with the load.
- the assembly then forms a true second very rich mixture intake circuit, separated from the intake via the air valve 8 only.
- the length of the conduit 15 may be studied so as not to allow the fuel mixture thus admitted into this conduit, to reach the pump housing 14, before being pushed back into the cylinder 1 by the pressure of the pump housing 14 returned to phase compression.
- Another very advantageous advantage lies in the fact that, in the case of a multi-cylinder engine whose set of cylinders operates according to the principle of the invention, with the suitable combinations of conduits 15, a single carburetor 42 can be used for all of the cylinders. Downstream of the carburetor, the different conduits 44 can be separated to end up at the different cylinders, in order to be able to supply with fuel mixture their respective conduits 15 through their respective valves 43.
- the carburetor device of FIG. 10 a variant of the case of FIG. 5, can also be adapted to the case of FIGS. 3, 4 and 6.
- the conduit 15 which connects the pump housing 14 to the combustion chamber of a cylinder 1 does not constitute a storage capacity, but essentially serves to convey the compressed gas in the pump housing 14 to the cylinder 1
- the duct 15 has a passage section sufficient not to create too great pressure losses of the transferred gas, but a small volume so as not to limit the compression ratio of the pump casing.
- valve 19 is pneumatic or hydraulic.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Supercharger (AREA)
Abstract
Description
La présente invention a pour objet un procédé et des dispositifs d'introduction sous pression de mélange carburé en fin de balayage par l'air dans un cylindre de moteur 2-temps. La source de pression utilisée est fournie par la pression régnant dans le carter du cylindre qui est en retard de 120° vilebrequin (cas d'un moteur 3, 6, ..., 3n cylindres) ou par le carter du cylindre en retard de 90° Vilebrequin (cas d'un moteur 4, 8, ..., 4n cylindres) par rapport au cylindre considéré où a lieu l'introduction de mélange carburé. Cette source de pression n'est pas stockée.The present invention relates to a method and devices for introducing pressurized fuel mixture at the end of air sweeping in a 2-stroke engine cylinder. The pressure source used is supplied by the pressure prevailing in the cylinder housing which is 120 ° behind the crankshaft (in the case of a 3, 6, ..., 3n cylinder engine) or by the cylinder housing which is delayed by 90 ° Crankshaft (in the case of a 4, 8, ..., 4n cylinder engine) with respect to the cylinder considered where the introduction of fuel mixture takes place. This pressure source is not stored.
L'introduction de mélange carburé sous pression se produit à l'arrivée de cette source de pression dans le cylindre considéré pendant sa phase de fin de balayage. L'arrivée de cette source de pression dans un dispositif de dosage de carburant prépare un mélange carburé pouvant être introduit dans le cylindre à travers un orifice qui sera de préférence ouvert uniquement pendant l'arrivée de cette source de pression. Cet orifice peut se trouver dans la culasse.The introduction of fuel mixture under pressure occurs on the arrival of this pressure source in the cylinder considered during its end of sweeping phase. The arrival of this pressure source in a fuel metering device prepares a fuel mixture which can be introduced into the cylinder through an orifice which will preferably be opened only during the arrival of this pressure source. This hole can be in the cylinder head.
Dans ce cas, le dispositif peut comporter une soupape commandée pour s'ouvrir pendant l'arrivée de cette source de pression, ou une soupape automatique (type clapet anti-retour) dont l'ouverture est commandée par la pression provenant de la source de pression.In this case, the device may include a valve controlled to open during the arrival of this pressure source, or an automatic valve (type non-return valve), the opening of which is controlled by the pressure coming from the source of pressure. pressure.
L'orifice peut aussi se trouver dans le cylindre. Son ouverture peut alors en être contrôlée par le mouvement du piston (cas d'une lumière) combiné à un dispositif anti-retour de type clapet (ou à un boisseau rotatif).The hole can also be in the cylinder. Its opening can then be controlled by the movement of the piston (in the case of a light) combined with a non-return device of the valve type (or with a rotary plug).
Par exemple, un mode de réalisation de ce type peut être de relier le carter du cylindre retardé de 120 ou 90° Vilebrequin au cylindre considéré, via un conduit de transfert arrivant côté opposé à l'échappement dans le cylindre considéré (conduit généralement appelé conduit de transfert arrière).For example, one embodiment of this type can be to connect the cylinder housing delayed by 120 or 90 ° Crankshaft to the cylinder considered, via a transfer duct arriving opposite the exhaust side in the cylinder considered (duct generally called duct rear transfer).
Dans la mesure où le lieu de dosage du carburant (en amont de l'orifice d'admission débouchant dans le cylindre) n'est pas sous une pression supérieure à la pression ambiante pendant tout le temps en dehors de la période d'introduction de mélange carburé, ce dosage peut s'effectuer à l'aide d'injecteurs basse pression, mais aussi à l'aide de dispositifs plus simples, comme, par exemple, un carburateur du type de ceux utilisés à l'admission d'un moteur deux-temps.Insofar as the place of metering of the fuel (upstream of the intake orifice opening into the cylinder) is not under a pressure greater than the ambient pressure during all the time outside the period of introduction of fuel mixture, this dosage can be done using low pressure injectors, but also using simpler devices, such as, for example, a carburetor of the type used for the intake of an engine two-stroke.
D'une manière générale, la présente invention concerne un dispositif d'introduction sous pression du mélange carburé dans un premier cylindre d'un moteur à combustion interne, ce moteur comportant au moins un autre cylindre ayant un carter pompe. Le dispositif selon l'invention se caractérise en ce qu'il comporte une canalisation de liaison entre ledit carter pompe et le premier cylindre et en ce qu'il existe un décalage angulaire non nul entre le cycle de chacun desdits cylindres.In general, the present invention relates to a device for introducing under pressure the fuel mixture into a first cylinder of an internal combustion engine, this engine comprising at least one other cylinder having a pump casing. The device according to the invention is characterized in that it comprises a connecting pipe between said pump casing and the first cylinder and in that there is a non-zero angular offset between the cycle of each of said cylinders.
Ce décalage angulaire pourra être de 120° et le cycle du premier cylindre pourra précéder le cycle de l'autre cylindre de 120°.This angular offset can be 120 ° and the cycle of the first cylinder can precede the cycle of the other cylinder by 120 °.
De même, ce décalage angulaire pourra être de 90° et le cycle du premier cylindre pourra précéder le cycle de l'autre cylindre de 90°.Likewise, this angular offset may be 90 ° and the cycle of the first cylinder may precede the cycle of the other cylinder by 90 °.
Le dispositif selon l'invention s'applique notamment aux moteurs comportant un nombre de cylindre multiple de 3 ou 4.The device according to the invention applies in particular to engines comprising a number of cylinders multiple of 3 or 4.
La canalisation pourra déboucher dans le premier cylindre au voisinage de la culasse du moteur.The pipeline may open into the first cylinder in the vicinity of the cylinder head of the engine.
De même la canalisation pourra déboucher dans le premier cylindre sur la paroi latérale de ce cylindre sensiblement à la partie basse de ce cylindre.Likewise, the pipeline may open into the first cylinder on the side wall of this cylinder substantially at the bottom of this cylinder.
Le dispositif selon l'invention pourra comporter un organe d'obturation placé entre la canalisation et le premier cylindre, sensiblement au voisinage de ce dernier.The device according to the invention may include a shutter member placed between the pipe and the first cylinder, substantially in the vicinity of the latter.
L'organe d'obturation pourra être une soupape commandée par une came, ou électromagnétiquement, ou un boisseau tournant.The shutter member may be a valve controlled by a cam, or electromagnetically, or a rotating plug.
De même, l'organe d'obturation pourra être automatique et être adapté à agir à la manière d'un clapet.Likewise, the shutter member may be automatic and be adapted to act like a valve.
La canalisation pourra comporter un organe d'introduction et de dosage de carburant.The pipeline may include a fuel introduction and metering device.
Ce dispositif d'introduction du carburant pourra être un injecteur basse pression, de même qu'il pourra comporter une buse venturi associée audit injecteur basse pression.This fuel introduction device may be a low pressure injector, just as it may include a venturi nozzle associated with said low pressure injector.
Le dispositif d'introduction du carburant pourra être un carburateur.The fuel introduction device may be a carburetor.
La commande de ce carburateur pourra être couplée avec une commande qui contrôle la quantité de gaz introduite dans le carter pompe du premier cylindre.The control of this carburetor can be coupled with a control that controls the amount of gas introduced into the pump housing of the first cylinder.
Le dispositif selon l'invention pourra comporter entre le carburateur et la canalisation un élément anti- retour tel un clapet.The device according to the invention may comprise between the carburetor and the pipe a non-return element such as a valve.
On ne sortira pas du cadre de la présente invention si l'organe d'introduction et de dosage du carburant comporte une pompe à membrane actionnée par les pulsations de pression d'un carter pompe.It will not depart from the scope of the present invention if the fuel introduction and metering member comprises a diaphragm pump actuated by the pressure pulses of a pump casing.
Le conduit de sortie de cette pompe à membrane qui relie cette dernière à la canalisation, pourra comporter un système d'ajustement de sa section de passage. Ce système pourra comporter un pointeau et des moyens de commande prenant en compte la pression moyenne d'un carter.The outlet duct of this diaphragm pump which connects the latter to the pipeline, may include a system for adjusting its passage section. This system may include a needle and control means taking into account the average pressure of a casing.
La présente invention concerne également une méthode d'introduction sous pression du mélange carburé dans un premier cylindre d'un moteur à combustion interne, ce moteur comportant au moins un autre cylindre ayant un carter pompe. Cette méthode se caractérise en ce que l'on utilise la pression des gaz contenus dans ledit carter pompe comme source de pression pour injecter le mélange carburé dans l'autre cylindre.The present invention also relates to a method of introducing the fuel mixture under pressure into a first cylinder of an internal combustion engine, this engine comprising at least one other cylinder having a pump casing. This method is characterized in that the pressure of the gases contained in said pump housing is used as a pressure source for injecting the fuel mixture into the other cylinder.
Lorsque la présente invention concerne un moteur multicylindre pour lequel chaque cylindre comporte un carter pompe, chacun des cylindres pourra être connecté à un carter pompe d'un autre cylindre retardé angulairement.When the present invention relates to a multi-cylinder engine for which each cylinder comprises a pump casing, each of the cylinders may be connected to a pump casing of another cylinder angularly delayed.
Ainsi, dans le cas d'un moteur à trois cylindres ayant chacun un carter pompe, chaque cylindre pourra être en liaison avec le carter pompe du cylindre qui en retard de 120° vilebrequin.Thus, in the case of a three-cylinder engine each having a pump casing, each cylinder may be in connection with the pump casing of the cylinder which is 120 ° behind the crankshaft.
Selon la présente invention la canalisation de liaison ne sert pas de capacité de stockage et son volume peut être relativement faible.According to the present invention, the connecting pipe does not serve as storage capacity and its volume can be relatively small.
L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation illustrée par les figures annexées, parmi lesquelles :
- - la figure 1 illustre le principe d'utilisation de la pression régnant dans le carter du cylindre en retard de 120° Vilebrequin par rapport au cylindre considéré,
- - la figure 2 illustre le cas d'un retard de 90° Vilebrequin au
lieu 120° Vilebrequin, - - la figure 3 est relative au cas d'une introduction retardée de 120° Vilebrequin du mélange carburé dans la chambre de combustion du cylindre considéré, via une soupape commandée,
- - la figure 4 montre le cas d'une introduction retardée de 120° Vilebrequin du mélange carburé dans la chambre de combustion du cylindre considéré, via une soupape automatique,
- - la figure 5 illustre le cas d'une introduction retardée de 120° Vilebrequin du mélange carburé dans le transfert arriére du cylindre considéré, via un clapet anti-retour,
- - la figure 6 est relative au cas d'une introduction retardée de 120° Vilebrequin de mélange carburé dans le transfert arrière du cylindre considéré, via un boisseau rotatif,
- - la figure 7 montre le cas d'une introduction retardée de 90° Vilebrequin de mélange carburé dans le transfert arrière du cylindre considéré,
- - la figure 8 illustre un dispositif de dosage et d'introduction du carburant par la pression régnant dans le carter,
- - la figure 9 est semblable à la figure 8, mais avec le perfectionnement du dispositif de dosage en fonction de la charge moteur, et
- - la figure 10 montre le cas d'une introduction de mélange carburé préalablement admis via un carburateur classique.
- FIG. 1 illustrates the principle of using the pressure prevailing in the cylinder crankcase which is 120 ° crankshaft late with respect to the cylinder considered,
- FIG. 2 illustrates the case of a 90 ° crankshaft delay instead of 120 ° crankshaft,
- FIG. 3 relates to the case of a delayed introduction of 120 ° crankshaft of the fuel mixture into the combustion chamber of the cylinder in question, via a controlled valve,
- FIG. 4 shows the case of a delayed introduction of 120 ° crankshaft of the fuel mixture into the combustion chamber of the cylinder in question, via an automatic valve,
- FIG. 5 illustrates the case of a delayed introduction of 120 ° crankshaft of the fuel mixture into the rear transfer of the cylinder in question, via a non-return valve,
- FIG. 6 relates to the case of a delayed introduction of 120 ° crankshaft of fuel mixture into the rear transfer of the cylinder in question, via a rotary plug,
- FIG. 7 shows the case of a delayed introduction of 90 ° crankshaft of fuel mixture into the rear transfer of the cylinder considered,
- FIG. 8 illustrates a device for metering and introducing fuel by the pressure prevailing in the crankcase,
- FIG. 9 is similar to FIG. 8, but with the improvement of the metering device as a function of the engine load, and
- - Figure 10 shows the case of an introduction of fuel mixture previously admitted via a conventional carburetor.
La figure 1 montre en trait plein portant la référence P1, la courbe de variation de la pression dans le cylindre pendant le balayage de ce cylindre ou cylindre considéré.Figure 1 shows in solid lines with the reference P1, the pressure variation curve in the cylinder during the scanning of this cylinder or cylinder considered.
La courbe de variation de la pression du carter équipant ce cylindre est indiquée en pointillé, et porte la référence P3, et la variation de la pression dans le carter du cylindre en retard de 120° est indiquée en trait mixte et porte la référence P2. Ce carter retardé de 120° par rapport au cylindre considéré représente la source de pression. La figure 1 montre bien que la pression de cette source est supérieure à la pression du cylindre pendant une grande partie du balayage, correspond à la partie hachurée sur cette figure.The curve of variation of the pressure of the casing equipping this cylinder is indicated in dotted lines, and bears the reference P3, and the variation of the pressure in the casing of the cylinder lagging by 120 ° is indicated in dashed lines and bears the reference P2. This housing delayed by 120 ° relative to the cylinder considered represents the pressure source. Figure 1 shows that the pressure of this source is higher than the cylinder pressure during a large part of the scanning, corresponds to the hatched part in this figure.
Cette source de pression peut donc permettre l'introduction de mélange carburé pendant toute cette partie du cycle de fonctionnement du cylindre considéré où la différence de pression est suffisante. Par le choix et la conception de la méthode d'introduction adoptée, soupape commandée, soupape automatique, lumière plus clapet, ou lumière plus boisseau rotatif, il est possible de controler plus ou moins l'instant le plus favorable pour l'introduction de ce mélange carburé.This pressure source can therefore allow the introduction of fuel mixture during this whole part of the operating cycle of the cylinder considered where the pressure difference is sufficient. By the choice and the design of the method of introduction adopted, controlled valve, automatic valve, light more valve, or light more rotary valve, it is possible to control more or less the most favorable moment for the introduction of this fuel mixture.
La figure 2 montre le même cas, avec cette fois une source de pression provenant d'un carter en retard de 90° Vilebrequin par rapport au cylindre considéré, ceci correspond notamment au cas d'un moteur comportant quatre cylindres. Le principe en est le même, avec toutefois une source de pression disponible avec un décalage de 90° Vilebrequin arrivant 30° Vilebrequin plus tôt dans le balayage.FIG. 2 shows the same case, this time with a pressure source coming from a crankcase 90 ° behind the crankshaft relative to the cylinder considered, this corresponds in particular to the case of an engine comprising four cylinders. The principle is the same, with however a source of pressure available with an offset of 90 ° Crankshaft arriving 30 ° Crankshaft earlier in the sweep.
Les deux figures montrent par ailleurs que pendant toute une autre grande partie du cycle, la pression dans le cylindre considéré (qui n'est d'ailleurs pas représentée sur tout le cycle puisque ses valeurs sortiraient de l'échelle des figures), est supérieure à la pression de la source de pression, or, il est important qu'il n'y ait pas d'échange dans le sens cylindre considéré vers source de pression, pour ne pas perturber le fonctionnement de la source de pression et du dispositif de dosage de carburant qui lui est associé.The two figures also show that during a whole other large part of the cycle, the pressure in the cylinder considered (which is moreover not represented over the entire cycle since its values would go out of the scale of the figures), is greater than the pressure of the pressure source, however, it is important that there is no exchange in the cylinder direction considered towards pressure source, so as not to disturb the operation of the pressure source and the associated fuel metering device.
Les figures 3, 4, 5, 6, 7 représentent en traits pleins le cylindre considéré 1 avec son piston 2 en fin de balayage, son échappement 3, sa lumière d'échappement 4 qui est sur le point d'être fermée, ses lumières de transfert latérales 5, et arrière 6, son carter 7 avec une admission d'air uniquement, par exemple par clapets 8, sa bougie d'allumage 9, le système bielle-manivelle 10.Figures 3, 4, 5, 6, 7 show in solid lines the cylinder considered 1 with its
En traits mixtes est représenté le cylindre 11 ayant un piston 12 dont le mouvement est retardé angulairement de 120° par l'intermédiaire du système bielle-manivelle 13, par rapport au piston 2 du cylindre considéré 1. Le piston 12 est en phase de détente dans le cylindre 11 et en même temps de compression dans le carter pompe 14.In dashed lines is shown the
Le carter-pompe 14 dont le mouvement du piston 12 est retardé angulairement de 120° fournit la source de pression à travers le conduit 15.The
Dans le cas des figures 3 et 4, ce conduit est relié à la chambre de combustion 16 du cylindre considéré 1. Le transfert arrière 6 du cylindre 1 peut alors être éventuellement relié à son propre carter-pompe 7 par le conduit 17.In the case of FIGS. 3 and 4, this duct is connected to the
L'introduction de l'air sous pression provenant du carter-pompe 14 dans la chambre 16 se fait par un orifice 18 dont l'ouverture est commandée par une soupape 19. En amont de la soupape se trouve un dispositif d'introduction et de dosage basse-pression du carburant 20.The introduction of the pressurized air from the
Ce dispositif peut être un injecteur basse-pression que l'on trouve dans le commerce, ou une pompe de carburant actionnée par les pressions et dépressions successives d'un carter-pompe. Un schéma de ce dernier dispositif sera précisé à la figure 8. L'introduction du carburant liquide peut avoir lieu dans le conduit 15 aussi bien pendant tout le temps où la soupape 19 est fermée que pendant celui où elle est ouverte.This device can be a low-pressure injector that is found commercially, or a fuel pump actuated by successive pressures and depressions of a pump housing. A diagram of this latter device will be specified in FIG. 8. The introduction of the liquid fuel can take place in the
Ce dispositif 20 de dosage et d'introduction du carburant peut être associé à une buse-venturi 21 placée dans le conduit 15, juste en amont de la soupape 19 et de l'orifice 18, conformément au brevet EP-189.714, afin d'améliorer la pulvérisation du carburant par l'air provenant de la source de pression (carter-pompe 14).This fuel metering and
Juste en aval de l'orifice 18, on peut aussi avantageusement placer un déflecteur 22, ou dispositif d'orientation du jet de mélange introduit dans le cylindre. Ce dispositif faisant partie de la culasse ou rapporté sur la culasse est du type, par exemple, décrit dans le brevet EP-189.715.Just downstream of the
Dans le cas particulier de la figure 3, la soupape 19 est commandée mécaniquement, par exemple par une came 23 entraînée en rotation à la vitesse du moteur. Cette came commande le mouvement de la soupape 19 par l'intermédiaire d'un poussoir 24. Le rappel de la soupape 19 se fait par un ressort 25.In the particular case of FIG. 3, the
Dans le cas particulier de la figure 4 qui illustre une autre variante, la soupape 19 n'est pas commandée. Elle est simplement équipée d'un ressort de rappel 25. Elle est laissée libre de se déplacer en fonction des différences de pression amont et aval. Elle agit alors à la manière d'un clapet ou soupape automatique.In the particular case of FIG. 4 which illustrates another variant, the
La commande de la soupape peut être faite par un système électromagnétique qui peut être commandé électroniquement.The control of the valve can be done by an electromagnetic system which can be controlled electronically.
Dans le cas des deux figures 3 et 4, quand la pression dans le carter 14 est supérieure à la pression dans le cylindre 1 considéré (Fig. 1), l'introduction de mélange carburé peut se produire dans le cylindre 1, soit au moment commandé choisi (Fig. 3), soit automatiquement pendant cette période de différence de pression, entre carter 14 et cylindre 1 (Fig. 4). Dans les deux cas, le mouvement du piston 2 est tel qu'il ferme la lumière d'échappement 4 avant que le carburant ait pu s'échapper du cylindre 1 dans l'échappement 3, à travers cette même lumière 4.In the case of the two figures 3 and 4, when the pressure in the
Dans le cas des figures 5 et 6, le conduit 15 provenant de la source d'air comprimé 14 est relié à une lumière de transfert, préférentiellement à la lumière de transfert arrière 6, ainsi nommée car elle est sensiblement opposée à la lumière d'échappement. A proximité de la lumière 6 et en aval de celle-ci, un clapet anti-retour 26 empêche les gaz du cylindre 1 de pénêtrer dans le carter 14 pendant la phase de dépression de ce dernier.In the case of FIGS. 5 and 6, the
En amont du clapet, se trouve le dispositif 27 de dosage et d'introduction basse-pression du carburant. Cette introduction de carburant peut avoir lieu à n'importe quel moment du cycle, même quand la lumière 6 est obturée par le piston 2.Upstream of the valve, there is the
Ce dispositif 27 de dosage et d'introduction du carburant peut être un injecteur basse-pression que l'on trouve dans le commerce, ou une pompe de carburant actionnée par les pressions et dépressions successives d'un carter-pompe (Fig. 8), ou un carburateur classique actionné par le débit d'air le traversant. Dans ce dernier cas, il convient de prévoir un deuxième circuit d'admission d'air extérieur, par exemple à travers ce carburateur et à travers le conduit 15. Une représentation schématique en est faite à la figure 10.This fuel metering and
Dans tous les cas, la pulvérisation du mélange carburé pourra être avantageusement améliorée par un dispositif de type buse-venturi 28 placé juste en amont du clapet 26 conformément au brevet FR-2.575.521.In all cases, the spraying of the fuel mixture may be advantageously improved by a nozzle-
Dans le cas de la figure 6, le clapet 6 est remplacé par un boisseau rotatif 29 entraîné par la rotation du moteur et commandant ainsi préférentiellement l'ouverture de la lumière 6.In the case of Figure 6, the
La figure 7 indique le cas de la figure 6 où la source de pression est fournie par le mouvement dans le carter-pompe 14 d'un piston 12 retardé angulairement de 90° Vilebrequin par rapport au mouvement du piston 2 du cylindre considéré 1. Il est évident que les cas des figures 3, 4, 5 pourraient être décrits aussi de la même façon avec ce retard de 90°V au lieu de 120°V.Figure 7 shows the case of Figure 6 where the pressure source is provided by the movement in the
La figure 8 montre une représentation schématique d'un dispositif de dosage de carburant pouvant être utilisé en lieu et place des dispositifs 20 ou 27.FIG. 8 shows a schematic representation of a fuel metering device which can be used in place of the
Ce dispositif pompe le carburant du réservoir 30 via le clapet anti-retour 31 jusqu'au conduit 34 à travers le clapet anti-retour 33. La membrane 32 fait office de pompe de carburant. D'un côté elle est en contact avec le carburant qu'elle pompe. De l'autre côté, son mouvement alternatif qui permet ce rôle de pompe est actionné par les pulsations de pression provenant d'un carter-pompe qui peut être indifféremment le carter 7 ou le carter 14 et qui est relié à ce côté de la membrane par le conduit 35.This device pumps the fuel from the
Pendant la phase d'admission du carter-pompe, celui-ci est en dépression et commande donc la membrane 32 de façon à augmenter le volume 36 en aspirant ainsi du carburant à travers le clapet 31 qui s'ouvre. Ensuite, pendant la phase de compression du carter, le mouvement de la membrane 32 réduit le volume 36 et pompe donc le carburant dans le conduit 34 via le clapet 33.During the intake phase of the pump crankcase, the latter is under vacuum and therefore controls the
Ce dispositif fait donc office de pompe et de dosage de carburant. Il est asservi au régime moteur, puisqu'il fournit un mouvement de pompe par tour, et il est aussi asservi à la charge puisque l'amplitude des pulsations de pression dans le carter est proportionnelle a la charge.This device therefore acts as a pump and fuel metering. It is slaved to the engine speed, since it provides one pump movement per revolution, and it is also slaved to the load since the amplitude of the pressure pulses in the crankcase is proportional to the load.
Dans le cas où il est utilisé seul, sans supplément de moyens de dosage plus fins, le conduit 34 est alors directement relié à l'emplacement dans le conduit 15 où a lieu l'introduction du carburant.In the case where it is used alone, without additional finer metering means, the
Dans le cas où un réglage plus fin du débit de carburant par rapport à la charge est nécessaire, l'ouverture du conduit 34 est ajustée en fonction de la charge par un pointeau 37 qui peut être actionné soit directement, soit indirectement par un levier 38 relié à une autre membrane 39. L'autre côté de la membrane 39 est là encore en communication avec la pression d'un carter-pompe du moteur via un conduit 40.In the case where a finer adjustment of the fuel flow rate relative to the load is necessary, the opening of the
L'inertie de l'ensemble constitué par le pointeau 37, le levier 38 et la membrane 39 est choisie telle qu'elle ne permet pas un mouvement de la membrane 39 suivant les pulsations de pression instantanée d'un carter. Elle doit être étudiée pour n'être commandée que par la pression moyenne d'un carter, pression qui est directement représentative de la charge du moteur. Il en résulte une position du pointeau de dosage directement représentative de la charge du moteur. A l'endroit du pointeau, le carburant ainsi dosé est guidé par le conduit 41 jusqu'au lieu d'introduction dans le conduit 15.The inertia of the assembly constituted by the
Enfin, la figure 10 montre une autre réalisation particulièrement simple du dispositif de dosage.Finally, Figure 10 shows another particularly simple embodiment of the metering device.
La source de pression du carter 14 à travers le conduit 15 qui sert à l'introduction de mélange carburé dans le cylindre 1, sert aussi pendant sa phase de dépression à l'aspiration de mélange carburé très riche via un carburateur classique 42 et un dispositif anti-retour de type clapet 43. Le carburateur est par exemple un carburateur du type classique pour moteur 2-temps, à boisseau et aiguille corrigeant l'ajutage du gicleur avec la charge.The pressure source of the
L'ensemble forme alors un véritable deuxième circuit d'admission de mélange très riche, séparé de l'admission via le clapet 8 d'air uniquement.The assembly then forms a true second very rich mixture intake circuit, separated from the intake via the
La longueur du conduit 15 pourra être étudiée pour ne pas permettre au mélange carburé ainsi admis dans ce conduit, d'atteindre le carter-pompe 14, avant d'être repoussé dans le cylindre 1 par la pression du carter-pompe 14 revenu en phase de compression.The length of the
Un autre avantage très intéressant réside dans le fait que, dans le cas d'un moteur multicylindre dont l'ensemble des cylindres fonctionne suivant le principe de l'invention, avec les combinaisons adaptées de conduits 15, un seul carburateur 42 peut être utilisé pour l'ensemble des cylindres. En aval du carburateur, les différents conduits 44 peuvent se séparer pour aboutir aux différents cylindres, afin de pouvoir alimenter en mélange carburé leurs conduits 15 respectifs à travers leurs clapets respectifs 43.Another very advantageous advantage lies in the fact that, in the case of a multi-cylinder engine whose set of cylinders operates according to the principle of the invention, with the suitable combinations of
Le dispositif à carburateur de la figure 10, variante du cas de la figure 5, peut aussi s'adapter au cas des figures 3, 4 et 6.The carburetor device of FIG. 10, a variant of the case of FIG. 5, can also be adapted to the case of FIGS. 3, 4 and 6.
Selon la présente invention le conduit 15 qui relie le carter-pompe 14 à la chambre de combustion d'un cylindre 1 ne constitue pas une capacité de stockage, mais sert essentiellement à acheminer le gaz comprimé dans le carter-pompe 14 vers le cylindre 1. Ainsi il est important selon la présente invention que le conduit 15 ait une section de passage suffisante pour ne pas créer de trop grandes pertes de charge du gaz transféré, mais un volume faible pour ne pas limiter le taux de compression du carter-pompe.According to the present invention the
Il est à noter que selon la présente invention il est inutile que le conduit 15 soit relié directement à une canalisation d'échappement. Selon la présente invention il est possible de ne pas utiliser la pression des gaz d'échappement pour effectuer l'injection du combustible.It should be noted that according to the present invention there is no need for the
On ne sortira pas du cadre de la présente invention si la commande de la soupape 19 est pneumatique ou hydraulique.It will not depart from the scope of the present invention if the control of the
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8709035 | 1987-06-26 | ||
FR8709035A FR2617240B1 (en) | 1987-06-26 | 1987-06-26 | DEVICE AND METHOD FOR PRESSURIZING CARBIDE MIXTURE INTO THE CYLINDER OF AN ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0296969A1 true EP0296969A1 (en) | 1988-12-28 |
EP0296969B1 EP0296969B1 (en) | 1993-08-18 |
Family
ID=9352560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88401569A Expired - Lifetime EP0296969B1 (en) | 1987-06-26 | 1988-06-22 | Device for the induction under pressure of a mixture in the cylinder of an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5062396A (en) |
EP (1) | EP0296969B1 (en) |
JP (1) | JP2673700B2 (en) |
DE (1) | DE3883311T2 (en) |
FR (1) | FR2617240B1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0346188A1 (en) * | 1988-06-08 | 1989-12-13 | Institut Français du Pétrole | Device and method for the introduction of a pressurized air-fuel mixture into the cylinder of an engine |
EP0406083A1 (en) * | 1989-06-30 | 1991-01-02 | Institut Français du Pétrole | Device for controlling the start of the introduction of pressurized mixture in an internal combustion engine and its application to the two-stroke engine |
EP0435730A1 (en) * | 1989-12-29 | 1991-07-03 | Institut Francais Du Petrole | Two-stroke engine with controlled pneumatic injection |
FR2656656A1 (en) * | 1989-12-29 | 1991-07-05 | Inst Francais Du Petrole | Two-stroke engine with controlled pneumatic injection |
FR2656653A1 (en) * | 1989-12-29 | 1991-07-05 | Inst Francais Du Petrole | Two-stroke engine with pneumatic injection controlled by an assisted valve |
FR2662214A1 (en) * | 1990-05-21 | 1991-11-22 | Inst Francais Du Petrole | Two-stroke engine with pneumatic fuel-injection and injection controlled by a rotary plug |
WO2003006822A1 (en) * | 2001-07-09 | 2003-01-23 | Normand Beaudoin | Power engine with retroactive injection |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2641336B1 (en) * | 1988-12-30 | 1994-05-20 | Institut Francais Petrole | DEVICE AND METHOD FOR INTRODUCING A FUEL MIXTURE INTO A CHAMBER OF A TWO-STROKE ENGINE |
JP3252196B2 (en) * | 1991-02-06 | 2002-01-28 | ヤマハ発動機株式会社 | In-cylinder two-stroke engine |
JPH05106456A (en) * | 1991-10-17 | 1993-04-27 | Kawasaki Heavy Ind Ltd | Multi-cylinder two cycle engine with stepped piston |
JPH05118225A (en) * | 1991-10-24 | 1993-05-14 | Kawasaki Heavy Ind Ltd | Two cycle engine having stepped piston |
JP2561593B2 (en) * | 1992-02-14 | 1996-12-11 | 川崎重工業株式会社 | Multi-cylinder two-cycle engine with stepped pistons |
JPH07310554A (en) * | 1993-03-31 | 1995-11-28 | Mitsubishi Heavy Ind Ltd | Crank case compression type two-cycle engine |
FR2725475B1 (en) * | 1994-10-11 | 1996-12-20 | Inst Francais Du Petrole | TWO-STROKE ENGINE WITH PNEUMATIC INJECTION OF CARBIDE MIXTURE |
US7270110B2 (en) * | 2000-04-24 | 2007-09-18 | Frank Keoppel | Four stroke internal combustion engine with inlet air compression chamber |
KR20020038912A (en) * | 2000-11-18 | 2002-05-24 | 김경환 | Short term internal combustion engine |
US20040031459A1 (en) * | 2001-08-08 | 2004-02-19 | Green William Delaplaine | Two-cycle internal combustion engine |
FR2856435B1 (en) * | 2003-06-20 | 2005-09-23 | Inst Francais Du Petrole | INTERNAL COMBUSTION ENGINE WITH INDIRECT INJECTION TO SWEEP GAS SCAN AND METHOD OF SUPPLYING SURALIMENT AIR FOR SUCH AN ENGINE |
DE102005002272A1 (en) * | 2005-01-18 | 2006-07-20 | Andreas Stihl Ag & Co. Kg | Two-stroke engine |
US10914205B2 (en) * | 2017-03-14 | 2021-02-09 | Onur Gurler | Rotational valve for two stroke engine |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE854125C (en) * | 1950-07-22 | 1952-10-30 | N S U Werke Ag | Mixture-flushed two-stroke carburetor engine with a charge pump that is connected to the cylinder via an overflow channel |
US2833255A (en) * | 1956-02-14 | 1958-05-06 | Lejardi Rafael | Plural cylinder two cycle engine |
US3289656A (en) * | 1964-04-27 | 1966-12-06 | Kiekhaefer Corp | Crossfeed scavenging for multi-cylinder two cycle engines |
US3698368A (en) * | 1970-03-13 | 1972-10-17 | Yamaha Motor Co Ltd | Fuel feed device for an internal combustion engine |
US4066050A (en) * | 1974-12-18 | 1978-01-03 | Ricardo & Co., Engineers (1927) Limited | Two-stroke I.C. engines |
FR2467288A1 (en) * | 1979-10-08 | 1981-04-17 | Quiniou Herve | Two-stroke IC engine - has charge transfer from crankcase controlled by rotary valve driven from crankshaft |
EP0189714A1 (en) * | 1984-12-28 | 1986-08-06 | Institut Français du Pétrole | Device for improving the quality of the carburetted mixture delivered by a pneumatic injection system |
EP0192010A1 (en) * | 1984-12-28 | 1986-08-27 | Institut Français du Pétrole | Apparatus and method for the injection of fuel into an internal-combustion engine assisted by compressed air or gas |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1600795A (en) * | 1926-09-21 | Internal-combustion engine | ||
US27367A (en) * | 1860-03-06 | Jasper johnson | ||
US1237312A (en) * | 1912-09-14 | 1917-08-21 | George W Donning | Internal-combustion engine. |
US1593989A (en) * | 1923-05-28 | 1926-07-27 | Rafter Albert | Internal-explosion engine |
US1986674A (en) * | 1930-12-03 | 1935-01-01 | Waldo G Gernandt | Internal combustion engine |
JPS584167B2 (en) * | 1974-08-06 | 1983-01-25 | ヤマハハツドウキ カブシキガイシヤ | Crank tension 2 cycle engine |
JPS5851373U (en) * | 1981-09-30 | 1983-04-07 | 株式会社日立製作所 | banknote payment device |
JPS58138221A (en) * | 1982-02-10 | 1983-08-17 | Sanshin Ind Co Ltd | Two-cycle multi-cylinder internal-combustion engine |
JPS58169117U (en) * | 1982-05-10 | 1983-11-11 | トヨタ自動車株式会社 | Fuel-injected spark-ignition two-stroke internal combustion engine |
JPS61182451A (en) * | 1985-02-08 | 1986-08-15 | Teikei Kikaki Kk | Engine |
-
1987
- 1987-06-26 FR FR8709035A patent/FR2617240B1/en not_active Expired - Fee Related
-
1988
- 1988-06-22 EP EP88401569A patent/EP0296969B1/en not_active Expired - Lifetime
- 1988-06-22 DE DE88401569T patent/DE3883311T2/en not_active Expired - Fee Related
- 1988-06-27 JP JP63160558A patent/JP2673700B2/en not_active Expired - Fee Related
-
1989
- 1989-11-09 US US07/461,487 patent/US5062396A/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE854125C (en) * | 1950-07-22 | 1952-10-30 | N S U Werke Ag | Mixture-flushed two-stroke carburetor engine with a charge pump that is connected to the cylinder via an overflow channel |
US2833255A (en) * | 1956-02-14 | 1958-05-06 | Lejardi Rafael | Plural cylinder two cycle engine |
US3289656A (en) * | 1964-04-27 | 1966-12-06 | Kiekhaefer Corp | Crossfeed scavenging for multi-cylinder two cycle engines |
US3698368A (en) * | 1970-03-13 | 1972-10-17 | Yamaha Motor Co Ltd | Fuel feed device for an internal combustion engine |
US4066050A (en) * | 1974-12-18 | 1978-01-03 | Ricardo & Co., Engineers (1927) Limited | Two-stroke I.C. engines |
FR2467288A1 (en) * | 1979-10-08 | 1981-04-17 | Quiniou Herve | Two-stroke IC engine - has charge transfer from crankcase controlled by rotary valve driven from crankshaft |
EP0189714A1 (en) * | 1984-12-28 | 1986-08-06 | Institut Français du Pétrole | Device for improving the quality of the carburetted mixture delivered by a pneumatic injection system |
EP0192010A1 (en) * | 1984-12-28 | 1986-08-27 | Institut Français du Pétrole | Apparatus and method for the injection of fuel into an internal-combustion engine assisted by compressed air or gas |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0346188A1 (en) * | 1988-06-08 | 1989-12-13 | Institut Français du Pétrole | Device and method for the introduction of a pressurized air-fuel mixture into the cylinder of an engine |
FR2632684A1 (en) * | 1988-06-08 | 1989-12-15 | Inst Francais Du Petrole | DEVICE AND METHOD FOR THE PRESSURIZED INTRODUCTION OF A CARBIDE MIXTURE IN THE CYLINDER OF AN ENGINE |
EP0406083A1 (en) * | 1989-06-30 | 1991-01-02 | Institut Français du Pétrole | Device for controlling the start of the introduction of pressurized mixture in an internal combustion engine and its application to the two-stroke engine |
FR2649158A1 (en) * | 1989-06-30 | 1991-01-04 | Inst Francais Du Petrole | DEVICE FOR MONITORING THE INTRODUCTION OF THE CARBIDE MIXTURE IN PRESSURE IN AN INTERNAL COMBUSTION ENGINE AND ITS APPLICATION TO THE 2-STROKE ENGINE |
EP0435730A1 (en) * | 1989-12-29 | 1991-07-03 | Institut Francais Du Petrole | Two-stroke engine with controlled pneumatic injection |
FR2656656A1 (en) * | 1989-12-29 | 1991-07-05 | Inst Francais Du Petrole | Two-stroke engine with controlled pneumatic injection |
FR2656653A1 (en) * | 1989-12-29 | 1991-07-05 | Inst Francais Du Petrole | Two-stroke engine with pneumatic injection controlled by an assisted valve |
FR2662214A1 (en) * | 1990-05-21 | 1991-11-22 | Inst Francais Du Petrole | Two-stroke engine with pneumatic fuel-injection and injection controlled by a rotary plug |
WO2003006822A1 (en) * | 2001-07-09 | 2003-01-23 | Normand Beaudoin | Power engine with retroactive injection |
Also Published As
Publication number | Publication date |
---|---|
DE3883311D1 (en) | 1993-09-23 |
FR2617240B1 (en) | 1992-10-02 |
JP2673700B2 (en) | 1997-11-05 |
FR2617240A1 (en) | 1988-12-30 |
EP0296969B1 (en) | 1993-08-18 |
JPS6435021A (en) | 1989-02-06 |
DE3883311T2 (en) | 1993-12-09 |
US5062396A (en) | 1991-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0296969B1 (en) | Device for the induction under pressure of a mixture in the cylinder of an internal combustion engine | |
FR2550280A1 (en) | FUEL INJECTION PROCESS FOR INTERNAL COMBUSTION ENGINES AND DEVICE FOR CARRYING OUT SAID METHOD | |
BE897463A (en) | FUEL SUPPLY SYSTEM FOR AN INTERNAL COMBUSTION ENGINE | |
FR2575523A1 (en) | DEVICE AND METHOD FOR INJECTING AIR-ASSISTED FUEL OR COMPRESSED GAS INTO A MOTOR | |
FR2500063A1 (en) | FOUR-STROKE THERMAL ENGINE LIKELY FOR TEMPORARY OVERPURPOSE | |
EP0376836B1 (en) | Device for introducing a carburetted mixture to the combustion chamber of a two-stroke engine | |
EP0346188B1 (en) | Device and method for the introduction of a pressurized air-fuel mixture into the cylinder of an engine | |
WO1979000757A1 (en) | Improvements in two-stroke engines enhancing the combustion and allowing a reduction of pollution | |
FR2582356A1 (en) | METHOD AND APPARATUS FOR FUEL INJECTION SYSTEMS | |
EP0786046B1 (en) | Pneumatically-controlled air-fuel mixture injection in a two-stroke engine | |
FR2673246A1 (en) | DEVICE FOR INJECTING LIQUID, PARTICULARLY FUEL, IN AT LEAST ONE PRESSURIZED CHAMBER OF A PERIODICALLY OPERATING MACHINE SUCH AS AN INTERNAL COMBUSTION ENGINE AND SUCH AN ENGINE PROVIDED WITH SUCH A DEVICE. | |
EP0786045B1 (en) | Two-stroke engine comprising an enhanced injection device and associated injection method | |
EP0691472B1 (en) | Internal combustion engine with pressure tank for specific purposes | |
EP0406083B1 (en) | Device for controlling the start of the introduction of pressurized mixture in an internal combustion engine and its application to the two-stroke engine | |
EP0577451B1 (en) | Device for controlling the pneumatic injection of carburetted mixture for a two stroke internal combustion engine and its use | |
EP0704017B1 (en) | Fuel-air mixture feed device for a two-stroke internal combustion engine | |
EP0458670B1 (en) | Method of pneumatic fuel injection in a two-stroke engine and such a two-stroke engine | |
EP0406078B1 (en) | Two-stroke engine with rotating valves and operation of said engine | |
CA1170520A (en) | Pump and injector array for internal combustion engines | |
FR2476224A1 (en) | FUEL INJECTION PUMP APPARATUS FOR COMPRESSION IGNITION ENGINE | |
FR2496757A1 (en) | Charge intake for two stroke IC-engine - has charge fed across crank case to inlet ports with valved intake for non-carburetted air | |
FR2585079A1 (en) | FUEL INJECTION METHOD FOR INTERNAL COMBUSTION ENGINES FOR INJECTING DOSE QUANTITIES IN THE COMBUSTION CHAMBER | |
EP0060184A1 (en) | Charging of two-stroke engines | |
FR2743111A1 (en) | Motor vehicle I.C. engine inlet | |
EP0637679A1 (en) | Two strobe engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19880708 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB IT NL SE |
|
17Q | First examination report despatched |
Effective date: 19910307 |
|
ITF | It: translation for a ep patent filed |
Owner name: ST. ASSOC. MARIETTI & PIPPARELLI |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB IT NL SE |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19930817 |
|
REF | Corresponds to: |
Ref document number: 3883311 Country of ref document: DE Date of ref document: 19930923 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
EAL | Se: european patent in force in sweden |
Ref document number: 88401569.4 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19970624 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980630 |
|
BERE | Be: lapsed |
Owner name: AUTOMOBILES CITROEN Effective date: 19980630 Owner name: AUTOMOBILES PEUGEOT Effective date: 19980630 Owner name: INSTITUT FRANCAIS DU PETROLE Effective date: 19980630 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20020320 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20020426 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020527 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020628 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020703 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030622 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030623 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040101 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040101 |
|
EUG | Se: european patent has lapsed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030622 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040227 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20040101 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050622 |