FR2854434A1 - Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown - Google Patents

Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown Download PDF

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Publication number
FR2854434A1
FR2854434A1 FR0305294A FR0305294A FR2854434A1 FR 2854434 A1 FR2854434 A1 FR 2854434A1 FR 0305294 A FR0305294 A FR 0305294A FR 0305294 A FR0305294 A FR 0305294A FR 2854434 A1 FR2854434 A1 FR 2854434A1
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FR
France
Prior art keywords
piston
combustion chamber
gases
crown
exhaust port
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.)
Withdrawn
Application number
FR0305294A
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French (fr)
Inventor
Bleis Didier Rolland Emile Le
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D L B
Original Assignee
D L B
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by D L B filed Critical D L B
Priority to FR0305294A priority Critical patent/FR2854434A1/en
Publication of FR2854434A1 publication Critical patent/FR2854434A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
    • F02B25/18—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke the charge flowing upward essentially along cylinder wall adjacent the inlet ports, e.g. by means of deflection rib on piston
    • 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
    • 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
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The system has a piston for retaining burnt gases expanded in a lower cylinder and for retaining pre-compressed fresh gas in a combustion chamber by the burnt gas before or after closing exhaust port of the combustion chamber by a piston crown. The burnt gas is released in a determined zone and forced into atmosphere by descending phase of the piston.

Description

- Description Les modifications apportées a l'invention visent essentiellement à en réduire le bruit, la pollution et la consommation suivant un principe de fonctionnement différent du premier moteur 2 temps à piston à couronne.
Le piston diffère du premier modèle, par sa couronne simple dépourvue de lumières, qui est équipé ou non d'un segment, suivant l'option choisie. Il évolue dans un cylindre adapté comportant, dans sa partie inférieure, une chambre annulaire dans laquelle sont usinés des transferts destinés à l'évacuation des gaz brûlés contrôlés par la couronne du piston qui, au point mort bas, retient ces gaz dans cette chambre suffisamment volumineuse pour les détendre et permettre, dans la chambre de combustion, l'arrivée de gaz frais précompressés dans le carter pompe du moteur, puis, au cours de sa remontée, retient ces gaz frais dans la chambre de combustion par l'intermédiaire des gaz brûlés, qui sont libérés dans une zone déterminée, pour le meilleur rendement du moteur,peu avant ou peu après la fermeture de la lumière d'échappement de la chambre de combustion, par la calotte du piston, pour être chassé avec force dans l'atmosphère en phase descendante.
La détente du piston est prolongée jusqu'au point mort bas par le transfert des gaz brûlés dans la chambre annulaire où ils appliquent une pression sur la couronne qui repousse, par sa face inférieure, les gaz de la combustion précédente vers l'atmosphère.
L'onde sonore émise par la combustion des gaz en détente est retenue dans la chambre annulaire où elle est étouffée, le transfert des gaz brûlés vers l'atmosphère se faisant indirectement.
Sur les moteurs a 4 temps, à injection essence et diesel, l'admission d'air pur ou injecté de carburant peut se faire en totalité par les clapets et transférer dans le cylindre par les lumières des transferts qui sont découverts par la calotte du piston, au passage du point mort bas, permettant ainsi de supprimer la ou les soupapes d'admission avec leur distribution, donc de simplifier le moteur et de diminuer les coûts de fabrication.
Le rendement est augmenté par un meilleur remplissage du cylindre, qui, en phase admission est en dépression jusqu'à l'ouverture des lumières communiquant avec le cylindre inférieur du piston-pompe, qui, alors en compression, propulse, l'air pur ou injecté de carburant dans la chambre de combustion, permettant une vitesse d'admission et un remplissage optimal.
En phase échappement, la combustion est amélioré par l'air pur propulsé dans la chambre de combustion, comme précédemment, il balaye le cylindre et favorise l'oxydation des gaz.
Ce système de piston-pompe convient également aux moteurs diesel et essence deux temps car, capable d'envoyer un volume d'air suffisant dans la chambre de combustion sans l'aide de compresseur, ni de soupapes, tout en conservant le système de graissage sous pression classique aux moteurs quatre temps.
- Revendications 1) Dispositif permettant de diminuer les nuisances sonores, la pollution et la consommation, caractérisé par un piston long, à couronne simple dépourvu de lumières, évoluant dans un cylindre adapté comportant dans sa partie inférieure, une chambre annulaire, dans laquelle sont usinés des transferts destinés à l'évacuation des gaz brûlés contrôlés par la couronne du piston et qui, au point mort bas retient les gaz brûlés détendus dans le cylindre inférieur, qui est d'un volume suffisant pour faire chuter la pression et permettre l'arrivée dans la chambre de combustion, des gaz frais précompréssés dans la carter pompe, en évitant toutes pertes, puis, au cours de sa remontée retient les gaz frais dans la chambre de combustion,par l'intermédiaire des gaz brûlés avant de les libérer au moment ou la calotte du piston referme la lumière d'échappement de la chambre de combustion et de les repousser fortement dans l'atmosphère, dans la phase descendante du piston, par la couronne qui prolonge la détente du piston jusqu'au point mort bas.- Description The modifications made to the invention are essentially aimed at reducing noise, pollution and consumption according to a different operating principle from the first 2-stroke crown piston engine.
The piston differs from the first model, by its simple crown devoid of lights, which may or may not be fitted with a segment, depending on the option chosen. It evolves in a suitable cylinder comprising, in its lower part, an annular chamber in which transfers are machined intended for the evacuation of the burnt gases controlled by the crown of the piston which, at bottom dead center, retains these gases in this chamber sufficiently bulky to relax them and allow, in the combustion chamber, the arrival of precompressed fresh gases in the engine crankcase, then, during its ascent, retains these fresh gases in the combustion chamber via the gases burned, which are released in a specific area, for the best performance of the engine, shortly before or shortly after the closing of the exhaust port of the combustion chamber, by the cap of the piston, to be forcefully driven into the descending atmosphere.
The expansion of the piston is extended to bottom dead center by the transfer of the burnt gases into the annular chamber where they apply pressure to the crown which pushes, by its underside, the gases of the previous combustion towards the atmosphere.
The sound wave emitted by the combustion of the expanding gases is retained in the annular chamber where it is smothered, the transfer of the burnt gases to the atmosphere taking place indirectly.
On 4-stroke engines, with petrol and diesel injection, the intake of pure air or fuel injected can be done entirely by the valves and transferred into the cylinder by the transfer lights which are discovered by the piston cap , when passing from bottom dead center, thus eliminating the intake valve or valves with their distribution, therefore simplifying the engine and reducing manufacturing costs.
The efficiency is increased by a better filling of the cylinder, which, in the intake phase is in depression until the opening of the lights communicating with the lower cylinder of the piston-pump, which, then in compression, propels, the pure air or injected with fuel into the combustion chamber, allowing optimum intake speed and filling.
In the exhaust phase, combustion is improved by the pure air propelled into the combustion chamber, as before, it sweeps the cylinder and promotes the oxidation of gases.
This piston-pump system is also suitable for diesel and two-stroke petrol engines because, capable of sending a sufficient volume of air into the combustion chamber without the aid of a compressor or valves, while retaining the lubrication system under conventional pressure with four-stroke engines.
- Claims 1) Device making it possible to reduce noise pollution, pollution and consumption, characterized by a long piston, with a simple crown devoid of lights, operating in a suitable cylinder comprising in its lower part, an annular chamber, in which are machined transfers intended for the evacuation of the burnt gases controlled by the crown of the piston and which, at bottom dead center retains the relaxed burnt gases in the lower cylinder, which is of sufficient volume to drop the pressure and allow the arrival in the combustion chamber, fresh gases precompressed in the pump casing, avoiding any losses, then, during its ascent retains the fresh gases in the combustion chamber, via the burnt gases before releasing them at the time or the piston cap closes the exhaust light from the combustion chamber and strongly push them back into the atmosphere, in the phase of ascent of the piston, by the crown which extends the expansion of the piston to bottom dead center.

Claims (4)

2) Dispositif suivant la revendication 1 caractérisée par le fait que le piston comporte 1 ou 2 segments sur la calotte et 1 sur la couronne, celui-ci étant facultatif. 3) Dispositif suivant la revendication 1 caractérisé par un piston long équipé d'une couronne dépourvue de transferts en son milieu, dont le diamètre est calculé pour obtenir un volume suffisant pour détendre les gaz brûlés dans la chambre de combustion. 4) Dispositif suivant la revendication 1 caractérisée par le fait que l'évacuation des gaz brûlés vers l'atmosphère débute peu avant ou peu après la fermeture de la lumière d'échappement de la chambre de combustion par la calotte du piston, en tenant compte que ce moment est déterminé dans la zone où se situe le meilleur rendement du moteur. 5) Dispositif suivant la revendication 1 caractérisé par une chambre annulaire dotée d'une sortie d'échappement à sa base et de transferts permettant l'évacuation des gaz brûlés, en tenant compte du moment de fermeture de la lumière d'échappement de la chambre de combustion par la calotte du piston. 6) Dispositif suivant la revendication 1 caractérisée par le fait que les gaz brûlés sont rejetés dans l'atmosphère indirectement, après avoir été détendus dans la chambre annulaire en prolongeant la détente du piston jusqu'au point mort bas. 7) Dispositif suivant la revendication 1 caractérisé par le fait que l'onde sonore émise par la combustion en détente est retenue dans la chambre annulaire où elle est étouffée, le transfert des gaz brûlés se faisant indirectement. 8) Dispositif suivant la revendication 1 caractérisé par le fait que la couronne du piston, au cours de sa remontée retient les gaz frais dans la chambre de combustion par l'intermédiaire des gaz brûlés jusqu'à la fermeture de la lumière d'échappement de la chambre de combustion par la calotte du piston, empêchant ainsi toutes fuites des gaz frais dans l'atmosphère, diminuant d'autant la pollution et la consommation.2) Device according to claim 1 characterized in that the piston has 1 or 2 segments on the cap and 1 on the crown, the latter being optional. 3) Device according to claim 1 characterized by a long piston equipped with a crown devoid of transfers in the middle, whose diameter is calculated to obtain a volume sufficient to relax the gases burned in the combustion chamber. 4) Device according to claim 1 characterized in that the evacuation of the burnt gases to the atmosphere begins shortly before or shortly after the closing of the exhaust port of the combustion chamber by the cap of the piston, taking into account that this moment is determined in the area where the best engine performance is located. 5) Device according to claim 1 characterized by an annular chamber with an exhaust outlet at its base and transfers allowing the evacuation of the burnt gases, taking into account the closing time of the exhaust light from the chamber combustion by the piston cap. 6) Device according to claim 1 characterized in that the burnt gases are released into the atmosphere indirectly, after being expanded in the annular chamber by extending the expansion of the piston to bottom dead center. 7) Device according to claim 1 characterized in that the sound wave emitted by the combustion in expansion is retained in the annular chamber where it is smothered, the transfer of the burnt gases being done indirectly. 8) Device according to claim 1 characterized in that the crown of the piston, during its ascent retains the fresh gases in the combustion chamber through the burnt gases until the exhaust port of the the combustion chamber by the cap of the piston, thus preventing any leakage of fresh gases into the atmosphere, thereby reducing pollution and consumption. 9) Dispositif permettant, sur les moteurs à 4 temps, à injection essence et diesel, le remplissage du cylindre en air pur ou injecté de carburant, sans soupapes d'admission, le volume d'air admis étant directement déterminé par les différences de diamètres et la course du piston, ces cotes étant calculés pour un fonctionnement optimum du moteur, et permettant, dans la phase échappement, d'améliorer le balayage du cylindre et l'oxydation des gaz par apport d'air pur. 9) Device allowing, on 4-stroke engines, with petrol and diesel injection, the filling of the cylinder with pure air or fuel injected, without intake valves, the volume of air admitted being directly determined by the differences in diameters and the piston stroke, these dimensions being calculated for optimum operation of the engine, and making it possible, in the exhaust phase, to improve the sweeping of the cylinder and the oxidation of the gases by supplying pure air. 10) Dispositif suivant la revendication 9 permettant de réduire les coûts de fabrication en supprimant la ou les soupapes d'admission et leur distribution.10) Device according to claim 9 for reducing manufacturing costs by eliminating the intake valve or valves and their distribution. 11) Dispositif suivant la revendication 9 permettant une vitesse d'admission et un remplissage optimal du cylindre, celui-ci étant en dépression jusqu'à l'ouverture des transferts d'admission, mis en surpression par la descente du piston.11) Device according to claim 9 allowing an admission speed and an optimal filling of the cylinder, the latter being in depression until the opening of the admission transfers, put in overpressure by the descent of the piston. 12) Dispositif convenant aux moteurs diesel 2 temps car capable d'envoyer un volume d'air suffisant dans la chambre de combustion, sans compresseur, ni soupapes, tout en conservant le système de graissage sous pression classique des moteurs quatre temps.12) Device suitable for 2-stroke diesel engines because capable of sending a sufficient volume of air into the combustion chamber, without compressor or valves, while retaining the conventional pressure lubrication system of four-stroke engines.
FR0305294A 2003-04-29 2003-04-29 Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown Withdrawn FR2854434A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0305294A FR2854434A1 (en) 2003-04-29 2003-04-29 Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0305294A FR2854434A1 (en) 2003-04-29 2003-04-29 Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown

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FR2854434A1 true FR2854434A1 (en) 2004-11-05

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FR0305294A Withdrawn FR2854434A1 (en) 2003-04-29 2003-04-29 Piston-pump system for two/four stroke petrol/diesel engine, has piston for retaining pre-compressed fresh gas in combustion chamber by burnt gas before or after closing exhaust port of combustion chamber by piston crown

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FR (1) FR2854434A1 (en)

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